CN211405519U

CN211405519U - Power supply system

Info

Publication number: CN211405519U
Application number: CN201922120739.7U
Authority: CN
Inventors: 杜蕴
Original assignee: Beijing Jingdong Qianshi Technology Co Ltd
Current assignee: Beijing Jingdong Qianshi Technology Co Ltd
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2020-09-01
Anticipated expiration: 2029-11-29

Abstract

The utility model discloses a power supply system relates to electron technical field. One embodiment of the power supply system includes: the device comprises a battery, a power manager, a distribution circuit, a conversion circuit and a discharge circuit; wherein the power manager, the distribution circuit, the conversion circuit, and the discharge circuit are integrated on a printed circuit board; the battery is connected with the distribution circuit and used for supplying power to the power manager, the conversion circuit and the discharge circuit through the distribution circuit; the power supply manager is respectively connected with the distribution circuit, the conversion circuit and the discharge circuit and is used for managing the distribution circuit, the conversion circuit and the discharge circuit. This embodiment has simplified the electrical connection of power system of AGV to make power system's overall arrangement more concentrated, reduced the occupied space of power system in the AGV, thereby improve AGV's manufacturability and reliability.

Description

Power supply system

Technical Field

The utility model relates to the field of electronic technology, especially, relate to a power supply system.

Background

An Automated Guided Vehicle (AGV) supplies power to its various functional components through its internal power supply system.

Because AGV power supply system's module is more, connects through electric wire between each module, and the inside wiring of AGV power supply system is comparatively complicated to, each module dispersion of AGV power supply system arranges, also makes the space that AGV power supply system occupy great.

SUMMERY OF THE UTILITY MODEL

In view of this, the embodiment of the utility model provides a power supply system can simplify AGV power supply system's electrical connection to make the overall arrangement of each module more concentrated among the power supply system, reduce shared space of power supply system in the AGV, thereby improve AGV's manufacturability and reliability.

To achieve the above object, according to one aspect of the embodiments of the present invention, a power supply system is provided.

The utility model discloses a power supply system includes: the device comprises a battery, a power manager, a distribution circuit, a conversion circuit and a discharge circuit; wherein the content of the first and second substances,

the power manager, the distribution circuit, the conversion circuit and the discharge circuit are integrated on a printed circuit board;

the battery is connected with the distribution circuit and used for supplying power to the power manager, the conversion circuit and the discharge circuit through the distribution circuit;

the power supply manager is respectively connected with the distribution circuit, the conversion circuit and the discharge circuit and is used for managing the distribution circuit, the conversion circuit and the discharge circuit.

Alternatively,

the distribution circuit is connected with the conversion circuit;

the conversion circuit includes a plurality of mutually isolated converters, and the output voltages of the batteries distributed by the distribution circuit are converted by the mutually isolated converters, so that the conversion circuit outputs different voltages for different electrical devices.

Alternatively,

the discharge circuit includes: a first MOSFET and a first high side driver circuit; wherein the content of the first and second substances,

the first high-side driving circuit is respectively connected with the power supply manager and the first MOSFET, and the first MOSFET is connected with the distribution circuit;

the power supply manager controls the on or off of the first MOSFET through the first high-side driving circuit, so that when the first MOSFET is switched on, power is supplied to an external servo system through the discharging circuit.

Alternatively,

the distribution circuit includes: a three-terminal fuse; wherein the content of the first and second substances,

the three-terminal fuse is respectively connected with the source electrode of the first MOSFET and the power supply manager;

and the power supply manager determines whether the first MOSFET is in a normal state or not according to the voltage between the source electrode and the drain electrode of the first MOSFET, and controls the three-terminal fuse to be fused when the first MOSFET is in an abnormal state so as to turn off the first MOSFET.

Alternatively,

the distribution circuit comprises a plurality of three-terminal fuses connected in parallel, the discharge circuit comprises a plurality of groups of first MOSFETs connected in parallel, and each group of first MOSFETs is connected with one servo system;

the number of the three-terminal fuses corresponds to the number of the first MOSFET groups one by one, and each three-terminal fuse is connected with the corresponding first MOSFET.

Alternatively,

a set of the first MOSFETs includes a plurality of first MOSFETs connected in parallel.

Alternatively,

the power supply system further includes: a charging circuit;

the charging circuit is connected with the power supply manager, and the charging circuit, the power supply manager, the distribution circuit, the conversion circuit and the discharge circuit are integrated on the PCB.

Alternatively,

the charging circuit is connected with an external power system in a wireless and/or wired mode so as to charge the battery by using the external power system.

Alternatively,

the charging circuit includes: the pair of second MOSFETs, the second high-side driving circuit and the first charging interface; wherein the content of the first and second substances,

the source electrodes of the pair of second MOSFETs are connected with the second high-side driving circuit, the drain electrode of one second MOSFET in the pair of second MOSFETs is connected with the external power system, and the drain electrode of the other second MOSFET in the pair of second MOSFETs is connected with the first charging interface;

the second high-side driving circuit is connected with the power supply manager, and the power supply manager controls the second MOSFET to be switched on or switched off through the second high-side driving circuit; when the second MOSFET is turned on, the battery is charged by the external power system.

Alternatively,

the charging circuit includes: the controllable rectifier bridge and the second charging interface;

one end of the controllable rectifier bridge is connected with the power supply manager and can be connected with the external power system through the second charging interface; the other end of the controllable rectifier bridge is connected with the first charging interface;

when the controllable rectifier bridge is connected with the external power system through the second charging interface, the controllable rectifier bridge adjusts the voltage output by the first charging interface under the control of the power manager so as to adjust the charging voltage of the battery.

An embodiment in the above-mentioned utility model has following advantage or beneficial effect: the power supply manager, the distribution circuit, the conversion circuit and the discharge circuit are integrated on the same PCB, and the power supply manager, the distribution circuit, the conversion circuit and the discharge circuit are not required to be connected through electric connecting lines, so that the electric connection of the power supply system is simplified, the layout of the power supply system is more concentrated, the space occupied by the power supply system in the AGV is reduced, and the manufacturability and the reliability of the AGV are improved.

Further effects of the above-mentioned non-conventional alternatives will be described below in connection with the embodiments.

Drawings

The accompanying drawings are included to provide a better understanding of the present invention and are not intended to constitute an undue limitation on the invention. Wherein:

fig. 1 is a schematic connection diagram of the main modules of a power supply system according to an embodiment of the present invention;

fig. 2 is a schematic connection diagram of a power supply system including main modules of a conversion circuit according to an embodiment of the present invention;

fig. 3 is a schematic connection diagram of a power supply system including main modules of a discharge circuit according to an embodiment of the present invention;

fig. 4 is a schematic connection diagram of a power supply system including main modules of a distribution circuit according to an embodiment of the present invention;

fig. 5 is a schematic connection diagram of a power supply system including main modules of a charging circuit according to an embodiment of the present invention.

Detailed Description

Exemplary embodiments of the invention are described below with reference to the accompanying drawings, in which various details of embodiments of the invention are included to assist understanding, and which are to be considered exemplary only. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.

It should be noted that the embodiments of the present invention and the technical features of the embodiments may be combined with each other without conflict.

Fig. 1 is a schematic diagram of main modules of a power supply system according to an embodiment of the present invention.

As shown in fig. 1, a power supply system 10 according to an embodiment of the present invention includes: a battery 11, a power manager 12, a distribution circuit 13, a conversion circuit 14, and a discharge circuit 15; wherein the content of the first and second substances,

the power manager 12, the distribution circuit 13, the conversion circuit 14 and the discharge circuit 15 are integrated on a printed circuit board 17;

the battery 11 is connected to the distribution circuit 13, and is used for supplying power to the power manager 12, the conversion circuit 14 and the discharge circuit 15 through the distribution circuit 13;

the power manager 12 is respectively connected to the distribution circuit 13, the conversion circuit 14, and the discharge circuit 15, and is configured to manage the distribution circuit 13, the conversion circuit 14, and the discharge circuit 15.

When the power supply system 10 is applied to the inside of the AGV to supply power to the functional components inside the AGV, the power supply manager 12, the distribution circuit 13, the conversion circuit 14 and the discharge circuit 15 are integrated on the same PCB (Printed circuit board) without connecting the power supply manager 12, the distribution circuit 13, the conversion circuit 14 and the discharge circuit 15 through electrical wires, so that the electrical connection of the power supply system 10 of the AGV is simplified, the layout of the power supply system 10 is more centralized, the space occupied by the power supply system 10 in the AGV is reduced, and the manufacturability and reliability of the AGV are improved.

It is understood that the power supply system 10 provided by the embodiment of the present invention can be applied to AGVs, and can also be applied to other devices requiring power supply, such as indoor service robots and unmanned distribution vehicles. When power supply system 10 is applied to different equipment, it charges and the power supply mechanism is the same, therefore, the embodiment of the present invention only uses power supply system 10 to be applied to the AGV as an example, and it is right that the embodiment of the present invention provides a detailed description of the working mechanism of power supply system 10.

When the embodiment of the present invention provides a power supply system 10 applied to AGVs, because the power consumption voltage of the electrical equipment such as the controller and the sensor used by the conventional AGVs is 24V, the special electrical equipment may adopt 12V or 5V, and the standard voltage of the battery output is generally 48V, in order to make the battery supply power for the electrical equipment of each difference, the embodiment of the present invention adopts the conversion circuit 14 to convert and control the voltage of the power output.

Specifically, as shown in fig. 2, the distribution circuit 13 is connected to the conversion circuit 14; the conversion circuit 14 includes a plurality of mutually isolated converters (fig. 2 illustrates a DC-DC converter as an example), and the output voltages of the batteries 11 distributed by the distribution circuit 13 are converted by the plurality of mutually isolated converters, respectively, so that the conversion circuit 14 outputs different voltages for different electrical devices.

In the present embodiment, the output voltage of the battery 11 is converted by using mutually isolated converters, which may be DC-DC converters. As shown in fig. 2, the output voltage of the battery 11 is 48V, and after being converted into 24V by the isolated DC-DC converter, the battery can supply power to the electrical devices outside the power supply system 10, such as the controller and the sensor. Instead of converting the 48V voltage output by the battery 11 into the 24V voltage, the voltage output by the battery 11 may be converted into a voltage of other magnitude, such as 12V or 5V, by another isolated DC-DC converter. The voltage is converted by the mutually isolated converters and then externally supplied, so that the influence on the stability of the voltage due to dynamic electrical noise can be avoided, in other words, the voltage is converted by the mutually isolated converters, and the stability of the voltage is improved.

In addition, the battery 11 also supplies power to the power manager 12, that is, the battery 11 also supplies power to the components inside the power system 10, in which case the converting circuit 14 may convert the voltage output by the power source 21 through a non-isolated converter and then supply power to the power manager 12 through the converted voltage. Since the battery 11 generally has less voltage instability when supplying power to the internal components of the power supply system 10, a non-isolated converter may be used to convert the voltage, and of course, an isolated converter may be used to convert the voltage output by the power supply 21, and fig. 2 shows an example of converting the voltage inside the power supply system 10 by using a non-isolated DC-DC converter.

It is understood that the above voltage conversion process can be controlled by the Power manager 12, and the Power manager 12 can be a Power Distribution Unit (PDU). As shown in fig. 2, the power manager inputs a control signal to the conversion circuit 14 to control each converter in the conversion circuit 14 to convert the voltage through the control signal. In addition, the voltage outlets corresponding to the converters can be configured with individual power supply switches, and the power supply switches are individually controlled by the power manager 12, so as to achieve the effect of high efficiency and energy saving.

As shown in fig. 3, in an embodiment of the present invention, the discharge circuit 15 includes: a first MOSFET152 (Metal-Oxide-Semiconductor Field-Effect Transistor) and a first high side driver circuit 151; wherein, the first high side driving circuit 151 is respectively connected to the power manager 12 and the first MOSFET152, and the first MOSFET152 is connected to the distribution circuit 13; the power manager 12 controls the first MOSFET152 to be turned on or off through the first high-side driving circuit 151, so that when the first MOSFET152 is turned on, power is supplied to an external servo system through the discharging circuit 15.

The AGV servo system generally uses a higher voltage/current, so that the servo system can be directly powered by the discharge circuit 15, in other words, the discharge circuit 15 has a main function of supplying a large current to the AGV servo system, and independently controls the power supply circuit of each path of servo system. Specifically, in the present embodiment, the first MOSFET152 is used as a switch of the discharge circuit, and the first high-side driving circuit 151 is provided, and the power manager 12 controls the first MOSFET152 to be turned on and off through the first high-side driving circuit 151, so that the first MOSFET152 is independently controlled, the risk of electric shock is reduced, and the safety of the AGV body is improved. Compared with the prior art in which the direct current contactor adopts a mechanical contact mode, that is, the two copper sheets are mechanically contacted and disconnected to realize on-off, the on-off control method has the advantages that loss is caused by abrasion of the copper sheets in the using process, so that delay and errors are possibly caused in on-off control, and the service life of a power supply system is short. And the embodiment of the utility model provides an adopt first MOSFET152 can tolerate heavy current pulse and strike, and the outstanding ability of current-resistant of local can not be lost, reduces on-off control's time delay and error to can prolong electrical power generating system's life-span.

To further improve the current endurance of the discharge circuit 15, with continued reference to fig. 3, in one embodiment of the present invention, the set of first MOSFETs 152 in the discharge circuit 15 includes a plurality of first MOSFETs connected in parallel. Fig. 3 illustrates that the group of first MOSFETs 152 includes two first MOSFETs 152 connected in parallel, and the group of first MOSFETs can be made more resistant to current flow by connecting a plurality of first MOSFETs in parallel.

In addition, in the discharging circuit 15, the first MOSFET152 and the first high-side driving circuit 151 are adopted, compared with the prior art, a pre-charging circuit and an external resistor are omitted, the wiring volume of the electrical connection line, namely the cost, is greatly simplified, the discharging circuit 15 and other modules in the power supply system 10 can be integrated on the same PCB 17, and the electrical connection of the power supply system 10 of the AGV is greatly simplified. In addition, the first MOSFET152 has high current tolerance, so that the discharge circuit 15 is very suitable for peak current through-flow at the moment of power supply, and the lossless current-withstanding capability of the power supply system 10 is improved.

Since the servo of the AGV typically uses higher voltages/currents, the distribution circuit 13 can distribute the voltage to the servo directly through the discharge circuit 15. In order to protect the servo system, in an embodiment of the present invention, the distribution circuit 13 includes: a three-terminal fuse; wherein, the three-terminal fuse is respectively connected with the source of the first MOSFET152 and the power manager 12;

the power manager 12 determines whether the first MOSFET152 is in a normal state according to the voltage between the source and the drain of the first MOSFET152, and controls the three-terminal fuse to blow when the first MOSFET152 is in an abnormal state, so that the first MOSFET152 is turned off.

In the above embodiment, the distribution circuit 13 can implement active and passive dual protection of the servo system through a three-terminal fuse. Specifically, the active protection strategy is: the power manager 12 can determine whether the first MOSFET152 is in the normal state through the voltage between the source and the drain of the first MOSFET152, for example, when the power manager 12 transmits a turn-off signal to the discharge circuit 15, at this time, if the discharge circuit 15 turns off the first MOSFET152 according to the turn-off signal, the voltage between the source and the drain of the first MOSFET152 should be 0, at this time, if the power manager 12 detects that the voltage between the source and the drain of the first MOSFET152 is not 0, it is determined that the first MOSFET152 is in the abnormal state, and in order to protect the servo system, the power manager 12 controls the three-terminal fuse in the distribution circuit 13 to turn off the first MOSFET152 in the discharge circuit 15, so as to prevent the servo system from being damaged due to an overcurrent. It is understood that when the power manager 12 detects that the voltage between the source and the drain of the first MOSFET152 does not match the control signal transmitted to the first MOSFET152, the first MOSFET152 can be determined to be in an abnormal state.

In addition, the passive protection policy of the distribution circuit 13 is: when the current flowing through the three-terminal fuse exceeds the threshold of the current which can be carried by the three-terminal fuse, the three-terminal fuse can be heated and blown to disconnect the discharge circuit 15 and the power supply of the servo system, thereby rapidly cutting off the abnormal power electric path. In summary, the active and passive dual protection of the servo system is realized by the three-terminal fuse in the distribution circuit 13, and the safety of the power supply system 10 is improved.

In order to achieve independent protection of each group of servo systems, in an embodiment of the present invention, as shown in fig. 4, the distribution circuit 13 includes a plurality of three-terminal fuses connected in parallel, the discharge circuit 15 includes a plurality of groups of first MOSFETs 152 connected in parallel, and each group of the first MOSFETs 152 is connected to one of the servo systems; the number of the three-terminal fuses corresponds to the number of the first MOSFETs 152, and each of the three-terminal fuses is connected to the corresponding first MOSFET 152.

It will be appreciated that the number of three-terminal fuses connected in parallel corresponds to the number of servo systems, and that when the AGV includes 4 sets of servo systems, then there are also 4 three-terminal fuses connected in parallel in the distribution circuit 13 (as shown in fig. 4). Accordingly, each three-terminal fuse corresponds to a group of first MOSFETs 152 connected in-line, so that each group of servo systems is individually protected by the active and passive protection strategies of each three-terminal fuse. It is understood that, as mentioned above, each group of the first MOSFETs 152 may include a plurality of first MOSFETs 152 connected in parallel to improve the current endurance of the discharge circuit 15. It is worth mentioning that in fig. 4, only one first MOSFET152 per group of first MOSFETs 152 is shown as an illustration.

In order to realize the charging of the AGV, as shown in fig. 1, the power supply system 10 according to the embodiment of the present invention further includes: a charging circuit 16; the charging circuit 16 is connected to the power manager 12, and the charging circuit 16, the power manager 12, the distribution circuit 13, the conversion circuit 14, and the discharge circuit 15 are integrated on the PCB 17.

Specifically, the charging circuit 16 and the external power system may be connected in a wireless and/or wired manner to charge the battery 11 using the external power system. As shown in fig. 1, when the charging circuit 16 is wirelessly connected to the external power system, the automatic charging control area 16 'of the charging circuit 16 can be connected to the external power system through the external charging pad 20, and it is understood that the connection line between the automatic charging control area 16' and the charging pad 20 in fig. 1 is only used for indicating the connection relationship between the two, and is not used for indicating that the two are connected by a wire. When the charging circuit 16 is connected to the external power system in a wired manner, the manual charging rectifying section 16 ″ of the charging circuit may be connected to the external power system through a charging plug (a second charging interface 165 described below).

In the charging process, in order to ensure that the charging tray 20 is not charged and ensure the charging safety, the MOSFET is used to realize the on-off control of the automatic charging loop. Specifically, in an embodiment of the present invention, as shown in fig. 5, the charging circuit 16 includes: a pair of second MOSFETs 161, a second high side driving circuit 162, and a first charging interface 163; wherein the content of the first and second substances,

the source of the pair of second MOSFETs 161 is connected to the second high side driver circuit 162, the drain of one of the pair of second MOSFETs 161 is connected to the external power system, and the drain of the other second MOSFET is connected to the first charging interface 163;

the second high-side driving circuit 162 is connected to the power manager 12, and the power manager 12 controls the second MOSFET161 to be turned on or off through the second high-side driving circuit 162; when the second MOSFET161 is turned on, the battery 11 is charged with the external power system.

When the charging circuit 16 is wirelessly connected to an external power system, that is, the charging circuit 16 is connected to the external power system through the charging pad 20, the second MOSFET161 may be an N-MOSFET, and is connected to the sources of the pair of second MOSFETs 161 through the second high-side driving circuit 162, that is, in a form of a pair of N-MOSFET pair transistors, so as to simultaneously control the gates of the pair of second MOSFETs 161 to perform on-off operation, and through two opposite-phase diodes in the pair of second MOSFETs 161, the charging pad 20 is not charged during charging, thereby ensuring safety and reliability during charging. In addition, the loss of charging internal resistance can be reduced by adopting a mode that a plurality of groups of N-MOSFET are connected in parallel to the transistor, so that the charging efficiency is improved.

In addition, when the charging circuit 16 is connected to the external power system in a wired manner, the voltage supplied from the external power system is generally 220V, and the charging voltage of the battery 11 is generally smaller than 220V, for example, 54.6V, so that when the battery 11 is charged by the external power system, the voltage supplied from the external power system needs to be converted to fit the charging voltage of the battery 11. In the prior art, an external transformer is generally adopted to convert the voltage provided by the external power system, so that during charging, the transformer needs to be externally connected through a manual charging port provided by a power supply system, and then the transformer is connected with the external power system, so that the voltage provided by the external power system is converted through the external transformer. When the charging mode in the prior art is adopted, the external transformer is required for each charging, so that the charging process is complicated, the transformer matched with the conversion voltage phase needs to be found firstly, and then the charging can be carried out after the transformer is externally connected.

In the embodiment of the present invention, with continued reference to fig. 5, the charging circuit 16 includes: a controllable rectifier bridge 164 and a second charging interface 165; one end of the controllable rectifier bridge 164 is connected to the power manager 12, and can be connected to the external power system through the second charging interface 165; the other end of the controllable rectifier bridge 164 is connected to the first charging interface 163;

when the controllable rectifier bridge 164 is connected to the external power system through the second charging interface 165, the controllable rectifier bridge 164 adjusts the voltage output by the first charging interface 163 under the control of the power manager 12 to adjust the charging voltage of the battery 11.

In the above embodiment, the voltage of the external power system is converted by the controllable rectifier bridge 164, so that when the battery 11 is charged, the external power system is directly connected through the second charging interface 165, as shown in fig. 5, the second charging interface 165 may be a three-phase socket, the second charging interface may be connected to the controllable rectifier bridge 164 in the charging circuit 16 through a general 220V electrical connection, and when the second charging interface 165 is externally connected to the 220V three-phase socket, the external power system may be connected to the external power system, and the battery 11 is charged by the voltage of the external power system. That is to say, in the embodiment of the present invention, through controllable rectifier bridge 164, when charging for power supply system 10, can directly charge the external power system through second charging interface 165 connected to controllable rectifier bridge 164, then the voltage of external power system can be converted by controllable rectifier bridge 164 inside charging circuit 16, so that when charging, it is not necessary to look for and connect the transformer in addition, thereby simplifying the charging operation of power supply system 10, and, realize the voltage change inside power supply system 10, the practicality and the integration of power supply system 10 are improved. It will be appreciated that the conversion of the voltage by the controllable rectifier bridge 164 is under the control of the power manager 12.

In addition, in order to be compatible AGV battery charge and discharge with mouthful or different mouthful difference the embodiment of the utility model provides an in, as shown in fig. 5, first interface 163 that charges adopts two the tunnel mouth that charges to utilize two tunnel mouths and battery to carry out outside combination to the interface (the short splicing shown in fig. 1 and fig. 5) of charging, in order to reach general compatible purpose.

According to the utility model discloses electrical power generating system 10 can see out, through with power manager, distribution circuit, converting circuit and discharge circuit integration on same PCB board, and need not to connect power manager, distribution circuit, converting circuit and discharge circuit through electric line, the electrical power generating system electrical connection of AGV has been simplified to make electrical power generating system's overall arrangement more concentrated, reduced electrical power generating system shared space in the AGV, thereby improve AGV's manufacturability and reliability.

The above detailed description does not limit the scope of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions can occur, depending on design requirements and other factors. Any modification, equivalent replacement, 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. A power supply system (10), comprising: a battery (11), a power manager (12), a distribution circuit (13), a conversion circuit (14), and a discharge circuit (15); wherein the content of the first and second substances,

the power manager (12), the distribution circuit (13), the conversion circuit (14) and the discharge circuit (15) are integrated on a printed circuit board (17);

the battery (11) is connected with the distribution circuit (13) and used for supplying power to the power manager (12), the conversion circuit (14) and the discharge circuit (15) through the distribution circuit (13);

the power supply manager (12) is respectively connected with the distribution circuit (13), the conversion circuit (14) and the discharge circuit (15) and is used for managing the distribution circuit (13), the conversion circuit (14) and the discharge circuit (15).

2. The power supply system (10) of claim 1,

the distribution circuit (13) is connected with the conversion circuit (14);

the conversion circuit (14) includes a plurality of mutually isolated converters, and the output voltages of the batteries (11) distributed by the distribution circuit (13) are converted by the mutually isolated converters, so that the conversion circuit (14) outputs different voltages for different electrical devices.

3. The power supply system (10) of claim 1,

the discharge circuit (15) includes: a first MOSFET (152) and a first high side driver circuit (151); wherein the content of the first and second substances,

the first high-side driving circuit (151) is respectively connected with the power manager (12) and the first MOSFET (152), and the first MOSFET (152) is connected with the distribution circuit (13);

the power manager (12) controls the first MOSFET (152) to be switched on or switched off through the first high-side driving circuit (151), so that when the first MOSFET (152) is switched on, power is supplied to an external servo system through the discharging circuit (15).

4. The power supply system (10) of claim 3, wherein the distribution circuit (13) comprises: a three-terminal fuse; wherein the content of the first and second substances,

the three-terminal fuse is respectively connected with the source electrode of the first MOSFET (152) and the power supply manager (12);

the power manager (12) determines whether the first MOSFET (152) is in a normal state according to the voltage between the source and the drain of the first MOSFET (152), and controls the three-terminal fuse to be blown when the first MOSFET (152) is in an abnormal state so as to turn off the first MOSFET (152).

5. The power supply system (10) of claim 4,

the distribution circuit (13) comprises a plurality of three-terminal fuses connected in parallel, the discharge circuit (15) comprises a plurality of groups of first MOSFETs (152) connected in parallel, and each group of the first MOSFETs (152) is connected with one servo system;

the number of the three-terminal fuses corresponds to the number of the groups of the first MOSFET (152) one by one, and each three-terminal fuse is connected with the corresponding first MOSFET (152) respectively.

6. The power supply system (10) of claim 5,

a set of the first MOSFETs (152) includes a plurality of first MOSFETs (152) connected in parallel.

7. The power supply system (10) of claim 2, further comprising: a charging circuit (16);

the charging circuit (16) is connected with the power supply manager (12), and the charging circuit (16) is integrated with the power supply manager (12), the distribution circuit (13), the conversion circuit (14) and the discharge circuit (15) on the printed circuit board (17).

8. The power supply system (10) of claim 7,

the charging circuit (16) is connected with an external power system in a wireless and/or wired manner so as to charge the battery (11) by using the external power system.

9. The power supply system (10) of claim 8, wherein the charging circuit (16) comprises: a pair of second MOSFETs (161), a second high side driver circuit (162), and a first charging interface (163); wherein the content of the first and second substances,

the source electrode of the pair of second MOSFETs (161) is connected with the second high-side driving circuit (162), the drain electrode of one second MOSFET (161) in the pair of second MOSFETs (161) is connected with the external power system, and the drain electrode of the other second MOSFET (161) is connected with the first charging interface (163);

the second high-side driving circuit (162) is connected with the power manager (12), and the power manager (12) controls the second MOSFET (161) to be switched on or switched off through the second high-side driving circuit (162); charging the battery (11) with the external power system when the second MOSFET (161) is turned on.

10. The power supply system (10) of claim 9, wherein the charging circuit (16) comprises: a controllable rectifier bridge (164) and a second charging interface (165);

one end of the controllable rectifier bridge (164) is connected with the power supply manager (12) and can be connected with the external power system through the second charging interface (165); the other end of the controllable rectifier bridge (164) is connected with the first charging interface (163);

when the controllable rectifier bridge (164) is connected with the external power system through the second charging interface (165), the controllable rectifier bridge (164) adjusts the voltage output by the first charging interface (163) under the control of the power manager (12) to adjust the charging voltage of the battery (11).