Integrated power supply architecture, power supply system, and vehicle

Abstract

The present application discloses an integrated power supply architecture, a power supply system, and a vehicle. A first voltage conversion circuit converts an inputted first voltage into a second voltage to charge a power battery pack, or converts a second voltage provided by the power battery pack into a first voltage for output; a second voltage conversion circuit converts the second voltage provided by the first voltage conversion circuit or the power battery pack into a third voltage; a power distribution circuit receives the third voltage, and distributes electrical energy to a plurality of load power supply terminals; the first voltage conversion circuit, the second voltage conversion circuit, and the power distribution circuit share a same controller. Thus, on-board charging / discharging and low-voltage power distribution functions are integrated in vehicle power supply, improving the degree of system integration, reducing the response times of the functional circuits, reducing the use of wiring harnesses, connectors, and the like, and reducing costs.

Description

Integrated power supply architecture, power supply system and vehicle

[0001] This application refers to the Chinese Patent Application No. 202411396137.3 entitled “Integrated power supply architecture, power supply system and vehicle” filed on September 30, 2024, which is incorporated by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of vehicles, in particular to an integrated power supply architecture, a power supply system and a vehicle. BACKGROUND

[0003] In new energy vehicles, a bidirectional vehicle-mounted charger usually adopts a traditional mechanical relay switch and a traditional plug-in fuse, which has the problems of being unable to be integrated, short service life, high noise and long protection response time. Therefore, the traditional power distribution scheme has been unable to meet the needs of future autonomous driving. TECHNICAL PROBLEM

[0004] The present application provides an integrated power supply architecture, a power supply system and a vehicle, aiming to solve the problem of long response time existing in the current power distribution scheme. TECHNICAL SOLUTION

[0005] In view of the above problems, the present application provides an integrated power supply architecture, a power supply system and a vehicle, aiming to solve the problem of long response time existing in the current power distribution scheme.

[0006] The first aspect of the embodiments of the present application provides an integrated power supply architecture, which comprises:

[0007] a power battery pack;

[0008] a first voltage conversion circuit, configured to convert a first voltage accessed into a second voltage to charge the power battery pack, or configured to convert a second voltage provided by the power battery pack into a first voltage to output;

[0009] a second voltage conversion circuit, connected with the first voltage conversion circuit, configured to convert the second voltage provided by the first voltage conversion circuit or the power battery pack into a third voltage; the third voltage is less than the second voltage;

[0010] a power distribution circuit, connected with the second voltage conversion circuit, configured to receive the third voltage and distribute power to a plurality of load power supply ends;

[0011] The first voltage conversion circuit, the second voltage conversion circuit and the power distribution circuit share the same controller.

[0012] In the technical scheme of the embodiment of the application, the first voltage conversion circuit converts the accessed first voltage into the second voltage to charge the power battery pack, or converts the second voltage provided by the power battery pack into the first voltage to output, the second voltage conversion circuit converts the first voltage or the second voltage provided by the power battery pack into the third voltage, and the power distribution circuit receives the third voltage and distributes power to the plurality of load power supply ends. The first voltage conversion circuit, the second voltage conversion circuit and the power distribution circuit share the same controller, thereby integrating the functions of the vehicle-mounted charging and discharging and the low-voltage power distribution in the vehicle power supply, improving the integration of the system, reducing the response time of each functional circuit, and reducing the use of wire harnesses, connectors and the like, thereby reducing the cost.

[0013] In some embodiments, the integrated power supply architecture further comprises a low-voltage battery and a battery management circuit.

[0014] The low-voltage battery provides the third voltage to the power distribution circuit through the battery management circuit, and the battery management circuit is controlled by the controller to manage the charging and discharging of the low-voltage battery.

[0015] In the technical scheme of the embodiment of the application, the low-voltage battery can provide the third voltage to the power distribution circuit through the battery management circuit, and the battery management circuit is controlled by the controller to manage the charging and discharging of the low-voltage battery. The management of the low-voltage power distribution is integrated by the same controller, thereby improving the integration of the vehicle power supply circuit, having a faster response speed and a lower cost.

[0016] In some embodiments, the power distribution circuit comprises a plurality of first load power supply ends and a plurality of self-recovery overcurrent protection units.

[0017] The first load power supply end is connected to the second voltage conversion circuit or the battery management circuit through the self-recovery overcurrent protection unit.

[0018] The self-recovery overcurrent protection unit is controlled by the controller.

[0019] In the technical scheme of the embodiment of the application, the first load power supply end can be connected to the second voltage conversion circuit or the battery management circuit through the self-recovery overcurrent protection unit, so that the second voltage conversion circuit or the battery management circuit provides the third voltage to the plurality of first load power supply ends, and the self-recovery overcurrent protection unit with the overcurrent protection and self-recovery function is controlled by the controller to realize the overcurrent protection of the first load power supply end, so that the first load power supply end can be exempted from maintenance when triggering the protection mechanism in the overcurrent state, and the overcurrent protection threshold of the self-recovery overcurrent protection unit can be set by the controller, thereby optimizing the wiring path of the low-voltage power distribution circuit and saving the material cost of the vehicle.

[0020] In some embodiments, the self-restoring over-current protection unit comprises an electronic fuse, which is powered by the second voltage conversion circuit and / or the low-voltage battery.

[0021] In some embodiments, the power distribution circuit comprises a plurality of second load power supply terminals and a plurality of load switches.

[0022] The second load power supply terminals are connected to the second voltage conversion circuit or the battery management circuit through the load switches.

[0023] The load switches are controlled by the controller.

[0024] In the technical solution of the embodiments of the present application, the second load power supply terminals are connected to the second voltage conversion circuit or the battery management circuit through the load switches, and the switching state of the load switches is controlled by the controller, so that the power supply state of the second load power supply terminals can be flexibly controlled. Moreover, the power semiconductor switch can be used as the load switch to replace the mechanical relay, so that more switching operations and faster switching response speed can be achieved, and the noise of the switching operation is reduced. The low circuit loss of the low-voltage distribution circuit can also be reduced by taking advantage of the low on-resistance of the semiconductor switch.

[0025] In some embodiments, the load switches comprise high-side drive switch chips or relays.

[0026] In some embodiments, the first voltage conversion circuit comprises a power factor correction unit and a bidirectional DC conversion unit.

[0027] The power factor correction unit is controlled by the controller to convert the alternating voltage into direct current voltage in the charging mode and to convert the direct current voltage into alternating voltage in the discharging mode.

[0028] The bidirectional DC conversion unit is controlled by the controller to control the voltage conversion between the power factor correction unit and the power battery pack.

[0029] In the technical solution of the embodiments of the present application, the bidirectional DC conversion unit controlled by the controller can control the voltage conversion between the power factor correction unit and the power battery pack. The power factor correction unit can be used as a front-stage AC / DC conversion circuit of the on-board charger to convert the alternating voltage input by the power grid into direct current voltage in the charging mode. The power factor correction unit controlled by the controller can convert the direct current voltage into alternating voltage in the discharging mode. The on-board charging system can control the power factor correction unit to work in the soft switching mode, so that the switching tube is turned on at zero voltage, thereby reducing the loss of the switching tube, improving the discharging efficiency of the power battery pack, reducing the current ripple of the alternating current end of the power factor correction unit, improving the discharging efficiency, and thereby improving the driving mileage of the vehicle and the service life of the battery.

[0030] In some embodiments, the integrated power supply architecture further comprises:

[0031] An isolated voltage sampling circuit is configured to sample a DC bus voltage of the power factor correction unit to obtain a voltage sampling signal output to the controller.

[0032] The controller is further configured to control an operating state of the bidirectional DC conversion unit according to the voltage sampling signal.

[0033] In the technical solution of the embodiment, the isolated voltage sampling circuit is configured to sample a DC bus voltage of the power factor correction unit to obtain a voltage sampling signal output to the controller, and the controller is configured to control an operating state of the bidirectional DC conversion unit according to the voltage sampling signal, thereby achieving real-time voltage monitoring of the power battery pack during charging and discharging. Since the controller integrates the control of the bidirectional DC conversion unit, the voltage of the DC bus of the power factor correction unit can be quickly regulated, thereby improving the stability of vehicle power consumption.

[0034] In some embodiments, the integrated power supply architecture further includes:

[0035] An inductor current sampling circuit is configured to sample an inductor current of the power factor correction unit to obtain an inductor current sampling signal output to the controller.

[0036] The controller is further configured to control an operating state of the power factor correction unit according to the inductor current sampling signal.

[0037] In the technical solution of the embodiment, the inductor current sampling circuit is configured to sample an inductor current of the power factor correction unit to obtain an inductor current sampling signal output to the controller, and the controller is further configured to control an operating state of the power factor correction unit according to the inductor current sampling signal, thereby achieving real-time current monitoring of the power battery pack during charging and discharging. Since the controller integrates the control of the bidirectional DC conversion unit, the current of the DC bus of the power factor correction unit can be quickly regulated, thereby improving the stability of vehicle power consumption.

[0038] In some embodiments, the integrated power supply architecture further includes an external power supply interface, a main relay circuit.

[0039] The external power supply interface is connected to the first voltage conversion circuit through the main relay circuit.

[0040] The main relay is connected to the controller through a Darlington transistor and is controlled by the controller to control the connection state between the external power supply interface and the first voltage conversion circuit.

[0041] In the technical scheme of the embodiment of the application, the external power supply interface can be connected to the vehicle-mounted charger, the vehicle-mounted charger can be connected to the first voltage conversion circuit via the main relay circuit, the main relay can be connected to the Lintron transistor, and the controller can output corresponding control signals to the Lintron transistor to drive the main relay circuit to be turned on or turned off by using the high current gain characteristic of the Lintron transistor.

[0042] In some embodiments, the integrated power supply architecture further includes a bidirectional switch circuit.

[0043] The second voltage conversion circuit is connected to the battery management circuit via the bidirectional switch circuit, and the bidirectional switch circuit is controlled by the controller.

[0044] In the technical scheme of the embodiment of the application, the bidirectional switch circuit can control the current direction between the second voltage conversion circuit and the battery management circuit. In the case that the second voltage conversion circuit is connected to the power battery pack inside the vehicle, the second voltage conversion circuit can convert the second voltage provided by the power battery pack into a third voltage to supply power to the low-voltage battery, and when the vehicle is started, the low-voltage battery can pre-charge the capacitor at both ends of the power battery pack to achieve the purpose of fast starting.

[0045] In some embodiments, the integrated power supply architecture further includes:

[0046] The switch self-checking circuit is configured to detect the voltage of the common end of the corresponding bidirectional switch circuit and generate a corresponding voltage detection signal to the controller according to the detection result;

[0047] The controller is further configured to control the switching state of the bidirectional switch circuit and determine the switch detection result according to the switching state of the bidirectional switch circuit and the voltage detection signal.

[0048] In the technical scheme of the embodiment of the application, the switch self-checking circuit can detect the voltage of the common end of the corresponding bidirectional switch circuit and generate a corresponding voltage detection signal according to the detection result. The controller can actively control the switching state of the bidirectional switch circuit and sequentially determine the performance of each bidirectional switch circuit according to the switching state of the bidirectional switch circuit and the voltage detection signal, thereby realizing the diagnosis of the bidirectional switch circuit.

[0049] In some embodiments, the switch self-checking circuit includes a first switch unit and a second switch unit.

[0050] The input ends of the first switch unit and the second switch unit are connected to the second voltage conversion circuit and the battery management circuit, respectively.

[0051] The switching states of the first switch unit and the second switch unit are controlled by the controller, and the output end of the first switch unit and the output end of the second switch unit are connected to the switch self-checking circuit.

[0052] In the technical solution of the embodiment of the application, the output end of the first switch unit and the output end of the second switch unit are connected to the switch self-checking circuit. When the first switch unit and the second switch unit are in the on state, the current of the first voltage bus connected with the second voltage conversion circuit can flow to the switch self-checking circuit through the first switch unit, and the current of the second voltage bus connected with the battery management circuit can flow to the switch self-checking circuit through the second switch unit. When the controller controls one of the two-way switch circuits to perform self-checking, the first switch unit and the second switch unit in the two-way switch circuit can be controlled to be disconnected first, and then the voltage at the common end of the switch self-checking circuit is detected to obtain a first voltage detection signal. Then the first switch unit and the second switch unit can be controlled to be turned on, and the voltage at the common end of the switch self-checking circuit is detected to obtain a second voltage detection signal. In this way, the controller can judge the performance of the two-way switch circuit based on the first voltage detection signal and the second voltage detection signal.

[0053] The second aspect of the embodiment of the application further provides a power supply system including the integrated power supply architecture according to any one of the above.

[0054] The third aspect of the embodiment of the application further provides a vehicle including the integrated power supply architecture according to any one of the above.

[0055] In the technical solution of the embodiment of the application, the first voltage connected is converted into the second voltage by the first voltage conversion circuit to charge the power battery pack, or the second voltage provided by the power battery pack is converted into the first voltage for output. The second voltage conversion circuit converts the second voltage provided by the first voltage conversion circuit or the power battery pack into the third voltage. The power distribution circuit receives the third voltage and distributes power to the multiple load power supply ends. The first voltage conversion circuit, the second voltage conversion circuit and the power distribution circuit share the same controller, thereby integrating the functions of the on-board charging and discharging and the low-voltage power distribution in vehicle power supply, improving the integration of the system, reducing the response time of each functional circuit, and reducing the use of wiring harnesses, connectors and the like, thereby reducing the cost.

[0056] The above description is only a summary of the technical solutions of the application. In order to more clearly understand the technical means of the application, the following specific embodiments of the application can be implemented according to the content of the description, and in order to make the above and other purposes, features and advantages of the application more obvious and easy to understand, the following specific embodiments of the application are described in detail. Advantages

[0057] In the technical solution of the embodiment, the first voltage conversion circuit converts the accessed first voltage into a second voltage to charge the power battery pack, or converts the second voltage provided by the power battery pack into a first voltage to output, the second voltage conversion circuit converts the first voltage or the second voltage provided by the power battery pack into a third voltage, and the power distribution circuit receives the third voltage and distributes power to the plurality of load power supply ends. The first voltage conversion circuit, the second voltage conversion circuit and the power distribution circuit share the same controller, thereby integrating the functions of the vehicle-mounted charging and discharging and the low-voltage power distribution in vehicle power supply, improving the integration of the system, reducing the response time of each functional circuit, and reducing the use of wire harnesses, connectors and the like, thereby reducing the cost. BRIEF DESCRIPTION OF DRAWINGS

[0058] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of preferred embodiments, and are not meant to limit the present application. Moreover, the same reference numerals in the different drawings represent the same or similar elements. In the drawings:

[0059] FIG. 1 is a first structure schematic diagram of an integrated power supply architecture provided by an embodiment of the present application;

[0060] FIG. 2 is a second structure schematic diagram of an integrated power supply architecture provided by an embodiment of the present application;

[0061] FIG. 3 is a third structure schematic diagram of an integrated power supply architecture provided by an embodiment of the present application;

[0062] FIG. 4 is a fourth structure schematic diagram of an integrated power supply architecture provided by an embodiment of the present application;

[0063] FIG. 5 is a fifth structure schematic diagram of an integrated power supply architecture provided by an embodiment of the present application;

[0064] FIG. 6 is a sixth structure schematic diagram of an integrated power supply architecture provided by an embodiment of the present application;

[0065] FIG. 7 is a seventh structure schematic diagram of an integrated power supply architecture provided by an embodiment of the present application;

[0066] FIG. 8 is an eighth structure schematic diagram of an integrated power supply architecture provided by an embodiment of the present application;

[0067] FIG. 9 is a ninth structure schematic diagram of an integrated power supply architecture provided by an embodiment of the present application;

[0068] FIG. 10 is a tenth structure schematic diagram of an integrated power supply architecture provided by an embodiment of the present application;

[0069] FIG. 11 is an eleventh structure schematic diagram of an integrated power supply architecture provided by an embodiment of the present application;

[0070] FIG. 12 is a structural schematic diagram of an isolation sampling circuit according to an embodiment of the present application;

[0071] FIG. 13 is a twelfth structural schematic diagram of an integrated power supply architecture according to an embodiment of the present application;

[0072] FIG. 14 is a thirteenth structural schematic diagram of an integrated power supply architecture according to an embodiment of the present application;

[0073] FIG. 15 is a fourteenth structural schematic diagram of an integrated power supply architecture according to an embodiment of the present application;

[0074] FIG. 16 is a fifteenth structural schematic diagram of an integrated power supply architecture according to an embodiment of the present application;

[0075] FIG. 17 is a sixteenth structural schematic diagram of an integrated power supply architecture according to an embodiment of the present application. Embodiments of the present application

[0076] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0077] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used herein are only for the purpose of describing specific embodiments of the present application, and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0078] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0079] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase is not necessarily referring to the same embodiment at different occurrences throughout the specification, nor is it necessarily referring to a separate or alternative embodiment to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0080] In the description of the embodiments of the present application, the term "and / or" is only to describe the relationship between the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0081] In the description of the embodiments of the present application, the term "multi-frame" refers to two or more (including two).

[0082] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0083] In the current vehicle power supply system, the bidirectional vehicle charger usually uses traditional mechanical relays and traditional plug-in fuses, which cannot realize low-voltage intelligent power supply and distribution, self-recovery overcurrent protection (EFUSE) functions, and have problems of short service life, high noise, long response time, and are not suitable for system architecture upgrade, etc. Therefore, the traditional power distribution scheme has been unable to meet the needs of future autonomous driving.

[0084] In order to solve the above technical problems, the embodiments of the present application provide an integrated power supply architecture, as shown in FIG. 1, the integrated power supply architecture in the embodiments of the present application includes: a power battery pack 100, a first voltage conversion circuit 200, a second voltage conversion circuit 300, a power supply distribution circuit 400, the first voltage conversion circuit 200 is used to convert the first voltage accessed to the second voltage to charge the power battery pack 100, or is used to convert the second voltage provided by the power battery pack 100 to the first voltage output, the second voltage conversion circuit 300 is connected with the first voltage conversion circuit 200, the second voltage conversion circuit 300 is used to convert the second voltage provided by the first voltage conversion circuit 200 or the power battery pack 100 to the third voltage; the third voltage is less than the second voltage. The power supply distribution circuit 400 is connected with the second voltage conversion circuit 300, and the power supply distribution circuit 400 is used to receive the third voltage and distribute power to a plurality of load power supply ends; the first voltage conversion circuit 200, the second voltage conversion circuit 300 and the power supply distribution circuit 400 share the same controller 500.

[0085] In the embodiment, the first voltage conversion circuit 200 converts the first voltage to the second voltage to charge the power battery pack 100, or converts the second voltage provided by the power battery pack 100 to the first voltage to output, and the voltage conversion between the power battery pack 100 and the external power supply in the vehicle is realized by the first voltage conversion circuit 200. The second voltage conversion circuit 300 converts the second voltage provided by the first voltage conversion circuit 200 or the power battery pack 100 to the third voltage, the power distribution circuit 400 receives the third voltage and distributes the power to the plurality of load power supply terminals, thereby realizing the low-voltage power distribution function in the vehicle. The same controller 500 is shared by the first voltage conversion circuit 200, the second voltage conversion circuit 300 and the power distribution circuit 400, thereby integrating the vehicle-mounted charging and discharging and low-voltage power distribution functions in the vehicle power supply system, improving the integration of the system, reducing the response time of each functional circuit, and reducing the use of wire harnesses, connectors and other uses, thereby reducing the cost.

[0086] In some embodiments, the first voltage conversion circuit 200 and the second voltage conversion circuit 300 can be integrated on the same circuit board, and the controller 500 can be arranged on another circuit board, which is beneficial to heat dissipation during the charging and discharging of the power battery pack 100.

[0087] In some embodiments, the first voltage can be 220V alternating current or high-voltage direct current.

[0088] In some embodiments, the second voltage can be 400V or 800V direct current.

[0089] In some embodiments, the third voltage can be 48V, 36V, 24V or 12V direct current.

[0090] In some embodiments, referring to FIG. 2, the integrated power supply architecture further includes a low-voltage battery 610 and a battery management circuit 620; the low-voltage battery 610 provides the third voltage to the power distribution circuit 400 through the battery management circuit 620, and the battery management circuit 620 is controlled by the controller 500 to manage the charging and discharging of the low-voltage battery 610.

[0091] In the embodiment, the low-voltage battery 610 can provide the third voltage to the power distribution circuit 400 through the battery management circuit 620, and the battery management circuit 620 is controlled by the controller 500 to manage the charging and discharging of the low-voltage battery 610, thereby integrating the management of the low-voltage power distribution by the same controller 500, improving the integration of the vehicle power supply circuit, having a faster response speed and a lower cost.

[0092] In some embodiments, referring to FIG. 3, the power distribution circuit 400 comprises: a plurality of first load supply terminals 411 and a plurality of self-resetting overcurrent protection units 410; the first load supply terminals 411 are connected to the second voltage conversion circuit 300 or the battery management circuit 620 through the self-resetting overcurrent protection units 410; and the self-resetting overcurrent protection units 410 are controlled by the controller 500.

[0093] In the present embodiment, the first load supply terminals 411 can be connected to the second voltage conversion circuit 300 or the battery management circuit 620 through the self-resetting overcurrent protection units 410, so that the third voltage is provided for the plurality of first load supply terminals 411 by the second voltage conversion circuit 300 or the battery management circuit 620, and the overcurrent protection of the first load supply terminals 411 is realized by the self-resetting overcurrent protection units 410 with the overcurrent protection and self-resetting functions and controlled by the controller 500, so that the first load supply terminals 411 can be exempted from maintenance when the protection mechanism is triggered in the overcurrent state, and the overcurrent protection threshold of the self-resetting overcurrent protection units 410 can be set by the controller 500, the wiring path of the low-voltage power distribution circuit is optimized, and the material cost of the vehicle is saved.

[0094] In some embodiments, the self-resetting overcurrent protection units 410 comprise electronic fuses, and the electronic fuses are powered by the second voltage conversion circuit 300.

[0095] In some embodiments, the electronic fuses can be powered by the low-voltage battery 610.

[0096] In some embodiments, the electronic fuses can be powered by the second voltage conversion circuit 300 and the low-voltage battery 610 at the same time.

[0097] In the present embodiment, the second voltage conversion circuit 300 and the low-voltage battery 610 can select at least one of them to power the electronic fuses, so as to ensure the working stability of the electronic fuses.

[0098] In some embodiments, referring to FIG. 4, the power distribution circuit 400 comprises: a plurality of second load supply terminals 421 and a plurality of load switches 420; the second load supply terminals 421 are connected to the second voltage conversion circuit 300 or the battery management circuit 620 through the load switches 420; and the load switches 420 are controlled by the controller 500.

[0099] In the embodiment, the second load power supply end 421 is connected to the second voltage conversion circuit 300 or the battery management circuit 620 through the load switch 420. The switching state of the load switch 420 is controlled by the controller 500. The power supply state of the second load power supply end 421 can be flexibly controlled. The power semiconductor switch can be used as the load switch 420 to replace the mechanical relay. Therefore, the switching operation can be performed more times, the switching response speed is faster, and the noise of the switching operation is reduced. The semiconductor switch has a low conduction resistance. Therefore, the loop loss of the low-voltage power distribution circuit can be reduced.

[0100] In some embodiments, the load switch 420 includes a high-side drive switch chip or a relay.

[0101] In some embodiments, referring to FIG. 5, the first voltage conversion circuit 200 includes a power factor correction unit 210 and a bidirectional direct current conversion unit 220. The power factor correction unit 210 is controlled by the controller 500 to convert an alternating voltage into a direct voltage in a charging mode and to convert the direct voltage into the alternating voltage in a discharging mode. The bidirectional direct current conversion unit 220 is controlled by the controller 500 to control the voltage conversion between the power factor correction unit 210 and the power battery pack 100.

[0102] In the embodiment, the bidirectional direct current conversion unit 220 is controlled by the controller 500 to control the voltage conversion between the power factor correction unit 210 and the power battery pack 100. The power factor correction unit 210 can be used as a front-stage alternating current-direct current conversion circuit of an on-board charger to convert an alternating voltage input by a power grid into a direct voltage in the charging mode. The power factor correction unit 210 is controlled by the controller 500 to convert the direct voltage into the alternating voltage in the discharging mode. The on-board charging system can control the power factor correction unit 210 to work in a soft switching mode, so that the switching tube is turned on at zero voltage. Therefore, the loss of the switching tube can be reduced, the discharging efficiency of the power battery pack 100 is improved, the current ripple of the alternating current end of the power factor correction unit 210 is reduced, the discharging efficiency is improved, and the driving mileage of the vehicle and the service life of the battery are improved.

[0103] In some embodiments, referring to FIG. 6, the integrated power supply architecture further includes an isolated voltage sampling circuit 710. The isolated voltage sampling circuit 710 is used to sample a direct bus of the power factor correction unit 210 to obtain a voltage sampling signal output to the controller 500. The controller 500 is further used to control the working state of the bidirectional direct current conversion unit 220 according to the voltage sampling signal.

[0104] In the embodiment, the voltage sampling circuit 710 can sample the DC bus of the power factor correction unit 210 to obtain a voltage sampling signal output to the controller 500. The controller 500 can control the working state of the bidirectional DC conversion unit 220 according to the voltage sampling signal, so as to realize real-time voltage monitoring of the charging and discharging of the power battery pack 100. Since the controller 500 integrates the control of the bidirectional DC conversion unit 220, the voltage of the DC bus of the power factor correction unit 210 can be quickly regulated, and the stability of the vehicle power supply is improved.

[0105] In some embodiments, referring to FIG. 7, the integrated power supply architecture further includes an inductor current sampling circuit 720 configured to sample the inductor current of the power factor correction unit 210 to obtain an inductor current sampling signal output to the controller 500; and the controller 500 is further configured to control the working state of the power factor correction unit 210 according to the inductor current sampling signal.

[0106] In the embodiment, the inductor current sampling circuit 720 can sample the inductor current of the power factor correction unit 210 to obtain an inductor current sampling signal output to the controller 500; and the controller 500 is further configured to control the working state of the power factor correction unit 210 according to the inductor current sampling signal, so as to realize real-time current monitoring of the charging and discharging of the power battery pack 100. Since the controller 500 integrates the control of the bidirectional DC conversion unit 220, the current of the DC bus of the power factor correction unit 210 can be quickly regulated, and the stability of the vehicle power supply is improved.

[0107] In some embodiments, the inductor current sampling circuit 720 can include a Hall sensor.

[0108] In some embodiments, referring to FIG. 8, the integrated power supply architecture further includes an external power supply interface 731 and a main relay circuit 732; the external power supply interface 731 is connected to the first voltage conversion circuit 200 through the main relay circuit 732; the main relay circuit is connected to the controller 500 through a Darlington transistor and is controlled by the controller 500 to control the connection state between the external power supply interface 731 and the first voltage conversion circuit 200.

[0109] In the embodiment, the external power supply interface 731 can be connected to a vehicle charger. The vehicle charger can be connected to the first voltage conversion circuit 200 through the main relay circuit 732. The main relay can be connected to the Darlington transistor. The controller 500 can output a corresponding control signal to the Darlington transistor to drive the main relay circuit 732 to be turned on or turned off by using the high current gain characteristic of the Darlington transistor.

[0110] In some embodiments, the controller 500 can be a DSP chip, and the change of the high and low voltage output by the IO end of the DSP chip causes the change of the voltage output by the Darlington transistor, which in turn causes the change of the voltage across the coil of the relay, thereby controlling the attraction and release of the contacts of the relay to make the relay conduct or break.

[0111] In some embodiments, the Darlington transistor has high voltage and large current driving capability, and the Darlington transistor can be composed of seven NPN Darlington pairs, with a high-voltage output and a common cathode clamping diode for switching inductive load.

[0112] In some embodiments, the third voltage provided by the power distribution circuit 400 can be received by the flyback power supply circuit, and a plurality of isolated voltages can be obtained based on the third voltage to power the controller 500 or some sensors.

[0113] In some embodiments, referring to FIG. 9, the integrated power supply architecture further includes a bidirectional switch circuit 750; the second voltage conversion circuit 300 is connected to the battery management circuit 620 through the bidirectional switch circuit 750, and the bidirectional switch circuit 750 is controlled by the controller 500.

[0114] In this embodiment, the bidirectional switch circuit 750 can control the current direction between the second voltage conversion circuit 300 and the battery management circuit 620. When the second voltage conversion circuit 300 is connected to the power battery pack 100 inside the vehicle, the second voltage conversion circuit 300 can convert the second voltage provided by the power battery pack 100 into a third voltage to charge the low-voltage battery 610. In addition, when the vehicle is started, the low-voltage battery 610 can pre-charge the capacitor across the power battery pack 100 to achieve the purpose of fast starting.

[0115] In some embodiments, referring to FIG. 10, the integrated power supply architecture further includes a switch self-checking circuit 760, which is used to detect the voltage of the common end of the corresponding bidirectional switch circuit 750 and generate a corresponding voltage detection signal according to the detection result and output it to the controller 500; the controller 500 is further used to control the switching state of the bidirectional switch circuit 750 and determine the switch detection result according to the switching state of the bidirectional switch circuit 750 and the voltage detection signal.

[0116] In the embodiment, the switch self-checking circuit 760 can detect the voltage of the common terminal of the corresponding bidirectional switch circuit 750, and generate a corresponding voltage detection signal according to the detection result. The controller 500 can actively control the switch state of the bidirectional switch circuit 750, and judge the performance of each bidirectional switch circuit 750 according to the switch state of the bidirectional switch circuit 750 and the voltage detection signal, thereby realizing the diagnosis of the bidirectional switch circuit 750.

[0117] In some embodiments, as shown in FIG. 11, the power factor correction unit 210 includes multiple groups of bridge arms connected to the controller 500 via corresponding isolation driving circuits, wherein the power factor correction unit 210 can share one core of the controller 500, and the bidirectional DC / DC conversion unit 220, the second voltage conversion circuit 300 and the battery management circuit 620 share another core of the controller 500.

[0118] In some embodiments, as shown in FIG. 11, in the power factor correction unit 210, the two ends of the first side of the first common mode inductor T1 are respectively connected in parallel with the voltage-dependent resistor R3 and the third capacitor C3, and one end thereof is grounded via the first capacitor C1 and can also be grounded via the voltage-dependent resistor R0. The other end of the first side of the first common mode inductor T1 is grounded via the second capacitor C2 and can also be grounded via the voltage-dependent resistor R2. One end of the first side of the first common mode inductor T1 is connected to the first external power supply end 201 via the fuse F1, and the other end thereof is connected to the second external power supply end 202. The first external power supply end 201 and the second external power supply end 202 can be connected to an external power supply.

[0119] In the embodiment, the voltage-dependent resistors are connected to the first external power supply end 201 and the second external power supply end 202 respectively to detect the input voltage, thereby avoiding the problem of damage to the devices in the subsequent stage caused by excessively large input voltage. In addition, the input current is filtered by multiple capacitors to improve the stability of the input current.

[0120] In some embodiments, as shown in FIG. 11, the second side of the first common mode inductor T1 is connected in parallel with the sixth capacitor C6, and the two ends thereof are connected to the two ends of the first side of the second common mode inductor T2. The second side of the first common mode inductor T1 is grounded via the fourth capacitor C4 and the fifth capacitor C5 respectively.

[0121] In some embodiments, as shown in FIG. 11, the two ends of the second side of the second common mode inductor T2 are grounded via the seventh capacitor C7 and the eighth capacitor C8 respectively, and are connected in parallel with the ninth capacitor C9.

[0122] In the embodiment, the current output by the second common-mode inductor T2 is filtered by the seventh capacitor C7, the eighth capacitor C8 and the ninth capacitor C9, and the voltage on the second side of the second common-mode inductor T2 is sampled by the isolation sampling circuit AMC1 to obtain a corresponding voltage sampling signal output to the controller 500.

[0123] In some embodiments, as shown in FIG. 11, the first end of the second side of the second common-mode inductor T2 is connected to the first bridge arm via the first switch K1 and the first inductor L1, and is connected to the second bridge arm via the second inductor L2, and the second end of the second side of the second common-mode inductor T2 is connected to the third bridge arm. The thermistor PTC is connected in parallel with the first switch K1, the temperature of the first switch K1 can be detected by the thermistor, the voltage on the second end of the first switch K1 is sampled by the isolation sampling circuit AMC2, and the state of the first switch K1 is controlled by the isolation circuit IS1, and the controller 500 can also be connected to the Hall sensor HA5 through the isolation circuit IS1, so as to sample the current of the bridge arm.

[0124] In the embodiment, as shown in FIG. 11, the first bridge arm includes the switch tube Q11 and the switch tube Q12 connected in series, the second bridge arm includes the switch tube Q13 and the switch tube Q14 connected in series, and the third bridge arm includes the switch tube Q15 and the switch tube Q16 connected in series. The first end and the second end of the second side of the second common-mode inductor T2 are connected in parallel with the fifth resistor R5 and the tenth capacitor C10 via the first switch K1, the second end of the first switch K2 is connected to the common node of the switch tube Q11 and the switch tube Q12 via the first inductor L1 and the Hall sensor HA1, the second end of the first switch K2 is connected to the common node of the switch tube Q13 and the switch tube Q14 via the second inductor L2 and the Hall sensor HA2, and the second end of the second side of the second common-mode inductor T2 is connected to the common node of the switch tube Q15 and the switch tube Q16. The controller 500 controls the switch tube Q11 and the switch tube Q12 via the isolation driving circuit IS2, the controller 500 controls the switch tube Q13 and the switch tube Q14 via the isolation driving circuit GD1, and the controller 500 controls the switch tube Q15 and the switch tube Q16 via the isolation driving circuit GD2.

[0125] In some embodiments, as shown in FIG. 11, in the power factor correction unit 210, the fourth bridge arm includes the switch tube Q17 and the switch tube Q18 arranged in series, and the fifth bridge arm includes the switch tube Q19 and the switch tube Q20 arranged in series, the fourth bridge arm and the fifth bridge arm are connected in parallel with the first bridge arm, the first end of the first bridge arm is connected to the cathode of the first diode D1, the second end of the first bridge arm is connected to the anode of the second diode D2, the anode of the first diode D1 and the cathode of the second diode D2 are connected to the second end of the first switch K1. The second end of the fourth bridge arm is connected to the second end of the first switch K1 through the Hall sensor HA5 and the second diode D2, the eleventh capacitor C11 is connected in parallel with the first bridge arm, the sixth resistor R6 and the seventh resistor R7 constitute a voltage sampling circuit for sampling the voltage across the first bridge arm, and the sampled voltage sampling signal is output to the controller 500 through the isolation sampling circuit AMC3. The controller 500 controls the switch tube Q17 and the switch tube Q18 through the isolation driving circuit GD3, and the controller 500 controls the switch tube Q19 and the switch tube Q20 through the isolation driving circuit GD4. In this embodiment, the controller 500 samples the current and voltage of the sampling node in the power factor correction unit 210, so as to control the switching state of the first bridge arm, the second bridge arm, the third bridge arm, the fourth bridge arm and the fifth bridge arm in real time according to the sampling result, so as to realize the conversion between alternating current and direct current according to the type of input power supply, and correct and compensate the power factor of the input power supply.

[0126] In some embodiments, as shown in FIG. 11, the isolation driving circuit GD4, the isolation driving circuit GD3, the isolation driving circuit GD5, the isolation driving circuit GD6, the isolation driving circuit GD7 and the isolation driving circuit GD8 can be connected to the second voltage conversion circuit 300 or the low-voltage battery 610 for power supply through the first power supply end VC1.

[0127] In some embodiments, as shown in FIG. 11, the bidirectional direct current conversion unit 220 includes the sixth bridge arm and the seventh bridge arm, the controller 500 controls the switching state of the switch tube Q21 and the switch tube Q22 in the first bridge arm through the isolation driving circuit GD5, the controller 500 controls the switching state of the switch tube Q23 and the switch tube Q24 in the second bridge arm through the isolation driving circuit GD6, the eighth resistor R8 and the ninth resistor R9 constitute a voltage sampling circuit for sampling the voltage across the seventh bridge arm to obtain a corresponding voltage sampling signal, and output the voltage sampling signal to the controller 500 through the isolation sampling circuit AMC4, so as to realize the voltage sampling of the bidirectional direct current conversion unit 220.

[0128] In some embodiments, as shown in FIG. 11, the bi-directional DC conversion unit 220 and the power factor correction unit 210 can also be connected through a transformer T0 for voltage conversion. The first end of the first side of the transformer T0 is connected to the fourth bridge arm through the third inductor L3 and the capacitor C12, and the second end of the first side of the transformer T0 is connected to the fifth bridge arm. The first end of the second side of the transformer T0 is connected to the sixth bridge arm through the fourth inductor L4 and the capacitor C21, and the second end of the second side of the transformer T0 is connected to the seventh bridge arm. The Hall sensor HA3 is arranged on the conversion loop of the bi-directional DC conversion unit 220, the loop current of the bi-directional DC conversion is sampled by the Hall sensor HA3, and the obtained sampling current signal is output to the controller 500.

[0129] In the present embodiment, the sixth bridge arm and the seventh bridge arm are connected to the positive HVDC+ and the negative HVDC- of the power battery pack 100 through the third common-mode inductor T3, the first side of the third common-mode inductor T3 is provided with a capacitor C22 in parallel, and the two ends of the first side of the third common-mode inductor T3 are respectively grounded through the capacitor C23 and the capacitor C24, the second side of the third common-mode inductor T3 is provided with a capacitor C27 in parallel, and the two ends of the second side of the third common-mode inductor T3 are respectively grounded through the capacitor C25 and the capacitor C26. In the present embodiment, the controller 500 realizes real-time conversion of alternating current and direct current by sampling the current and voltage of the sampling node in the bi-directional DC conversion unit 220, improves the voltage conversion efficiency, and suppresses common-mode interference in the voltage conversion process through the common-mode inductor.

[0130] In some embodiments, as shown in FIG. 11, in the second voltage conversion circuit 300, the controller 500 controls the switching state of the switch Q31 and the switch Q32 in the eighth bridge arm through the isolation drive circuit GD7, the controller 500 controls the switching state of the switch Q33 and the switch Q34 in the ninth bridge arm through the isolation drive circuit GD8, the two ends of the eighth bridge arm are connected to the positive pole HVDC+ and the negative pole HVDC- of the power battery pack 100 through the Hall sensor HA4, the two ends of the eighth bridge arm are connected in parallel to the capacitor C33, and are respectively connected to the ground through the capacitor C31 and the capacitor C32. The eighth bridge arm is connected to the first end of the first side of the transformer T4 through the capacitor C34, and the seventh bridge arm is connected to the second end of the first side of the transformer T4 through the fourth inductor L4. The first end of the second side of the transformer T4 is connected to the ground through the switch Q36, and the second end of the second side of the transformer T4 is connected to the low-voltage power distribution input DCDC2 through the fifth inductor L5, the Hall sensor HA7, the sixth inductor L6, the switch Q37, the switch Q38, and supplies power to the power distribution circuit 400 through the low-voltage power distribution input DCDC2. The third end of the second side of the transformer T4 is connected to the ground through the switch Q35, the controller 500 controls the switching state of the switch Q35 through the low-voltage side drive circuit LGD1, and controls the switching state of the switch Q36 through the low-voltage side drive circuit LGD2, the resistor R10 and the capacitor C35 are connected in series and connected in parallel to the two ends of the switch Q35, the resistor R11 and the capacitor C36 are connected in series and connected in parallel to the two ends of the switch Q36, and the two ends of the sixth inductor L6 are respectively connected to the ground through the capacitor C37 and the capacitor C38. The switch Q37 and the switch Q38 are arranged top-to-top to form a bidirectional switch circuit, the switching state of the switch Q37 and the switch Q38 is controlled by the controller 500, so as to adjust the current direction flowing through the bidirectional switch circuit, the resistor R12 and the resistor R13 constitute a voltage sampling circuit for voltage sampling of the first side of the bidirectional switch circuit to obtain a corresponding voltage sampling signal output to the controller 500, and the resistor R14 and the resistor R15 constitute a voltage sampling circuit for voltage sampling of the second side of the bidirectional switch circuit to obtain a corresponding voltage sampling signal output to the controller 500.

[0131] In some embodiments, as shown in FIG. 11, in the power distribution circuit 400, the bidirectional switch circuit 750 can include a bidirectional switch Q41 controlled by the controller 500, which can adjust the current direction between the low-voltage battery 610 and the low-voltage power distribution input DCDC2.

[0132] In some embodiments, as shown in FIG. 11, the battery management circuit 620 includes a bidirectional switch Q42 controlled by the controller 500, which can adjust the current direction between the low-voltage battery 610 and the second voltage bus 120.

[0133] In some embodiments, bidirectional switch device Q41 and bidirectional switch device Q42 are each composed of two MOS transistors arranged top-to-top.

[0134] In some embodiments, as shown in FIG. 11, second voltage conversion circuit 300 can connect multiple load switches 420 via first voltage bus 110, and low-voltage battery 610 via battery management circuit 620 can connect multiple load switches 420 via second voltage bus 120. Each load switch 420 includes at least one switch K21 and switch K22, and second voltage bus 120 connects one part of second load supply end 421 via switch K21, and first voltage bus 110 connects another part of second load supply end 421 via switch K22.

[0135] In some embodiments, as shown in FIG. 11, second voltage conversion circuit 300 can connect multiple self-resetting overcurrent protection circuits 410 via first voltage bus 110, and low-voltage battery 610 via battery management circuit 620 can connect multiple self-resetting overcurrent protection circuits 410 via second voltage bus 120. Each self-resetting overcurrent protection circuit 410 includes at least one electronic fuse EF1 and electronic fuse EF2, and second voltage bus 120 connects one part of first load supply end 411 via electronic fuse EF1, and first voltage bus 110 connects another part of first load supply end 411 via electronic fuse EF2.

[0136] In some embodiments, as shown in FIG. 11, each electronic fuse EF1 can be connected in series with a switch tube Q51, and each electronic fuse EF2 can be connected in series with a switch tube Q52.

[0137] In some embodiments, the circuit structure of the isolation sampling circuit AMC1, the isolation sampling circuit AMC2, the isolation sampling circuit AMC3, and the isolation sampling circuit AMC4 can be as shown in FIG. 12. In combination with FIG. 12, in the isolation sampling circuit, the sampling end BUS+ can be connected to the corresponding sampling node, the sampling end BUS+ is connected to the input pin VIN of the isolation amplifier S71 through the voltage dividing circuit composed of the resistors R31, R32, R33, and R34, the shutdown control pin SHTDN, the first ground pin GND1, and the second ground pin GND2 of the isolation amplifier S71 are grounded, the resistor R35 and the capacitor C41 are connected in parallel with the resistor R34 in the voltage dividing circuit, the isolation amplifier S71 converts the single-ended voltage signal input by the voltage dividing circuit into a differential signal and outputs the differential signal through the first differential pin VOUTP and the second differential pin VOUTN. The first supply pin VDD1 of the isolation amplifier S71 can be connected to the supply end V2, and the second supply pin VDD2 of the isolation amplifier S71 can be connected to the supply end V3. The supply end V2 is grounded through the capacitor C42, and the supply end V3 is grounded through the capacitor C43. The first differential pin VOUTP and the second differential pin VOUTN of the isolation amplifier S71 are connected to the non-inverting input pin and the inverting input pin of the operational amplifier S72 through the resistors R36 and R37, respectively, and the output pin of the operational amplifier S72 is connected to the sampling pin INS_UP of the controller 500 through the resistor R40.

[0138] In some embodiments, in combination with FIG. 12, the non-inverting input pin of the operational amplifier S72 is grounded through the resistor R38, the non-inverting input pin of the operational amplifier S72 is grounded through the capacitor C44, the inverting input pin of the operational amplifier S72 is connected to the output pin of the operational amplifier S72 through the resistor R39, and the inverting input pin of the operational amplifier S72 is connected to the output pin of the operational amplifier S72 through the capacitor C45. The operational amplifier S72 can input a differential signal for amplification processing and convert it into a corresponding single-ended signal output to the controller 500. The capacitor C46 is connected in parallel between the first power supply pin and the second power supply pin of the operational amplifier S72, and the first power supply pin is connected to the supply end V4.

[0139] In some embodiments, in combination with FIG. 12, the resistor R40 is grounded through the capacitor C47, and the resistor R40 and the capacitor C47 constitute an RC filter circuit to filter the signal of the output pin of the operational amplifier S72. And connected to the voltage reference end V5 through the diode D12 and grounded through the diode D11. The diode D11 and the diode D12 can constitute a clamping circuit to control the potential of the sampling pin INS_UP of the controller 500 within a predetermined range, avoiding damage to the controller 500 caused by the sampling signal exceeding the predetermined range.

[0140] In some embodiments, as shown in FIG. 13, the bidirectional switch circuit 750 connected between the first voltage bus 110 and the second voltage bus 120 can be multiple, each of the bidirectional switch circuit 750 connected between the first voltage bus 110 and the second voltage bus 120, and the number of the switch self-checking circuit 760 can be multiple, each of the switch self-checking circuit 760 connected to the common terminal of at least one of the bidirectional switch circuit 750, and the switch self-checking circuit 760 used to detect the voltage of the common terminal of the corresponding bidirectional switch circuit 750 and generate the corresponding voltage detection signal according to the detection result. The controller 500 connected with the bidirectional switch circuit 750 and the switch self-checking circuit 760, and the controller 500 used to control the switch state of the bidirectional switch circuit 750 and determine the switch detection result according to the switch state of the bidirectional switch circuit 750 and the voltage detection signal.

[0141] In the embodiment, each of the bidirectional switch circuit 750 connected between the first voltage bus 110 and the second voltage bus 120, and each of the switch self-checking circuit 760 connected to the common terminal of at least one of the bidirectional switch circuit 750, and the switch self-checking circuit 760 used to detect the voltage of the common terminal of the corresponding bidirectional switch circuit 750 and generate the corresponding voltage detection signal according to the detection result, and the controller 500 can actively control the switch state of at least two of the bidirectional switch circuit 750 and sequentially determine the performance of each of the bidirectional switch circuit 750 according to the switch state of at least two of the bidirectional switch circuit 750 and the voltage detection signal, thereby realizing the diagnosis of each of the bidirectional switch circuit 750.

[0142] For example, when one of the bidirectional switch circuit 750 works in the diagnosis mode, the voltage of the common terminal of the bidirectional switch circuit 750 can be detected by the corresponding switch self-checking circuit 760 in the case that the bidirectional switch circuit 750 is controlled to be off, and the corresponding first voltage detection signal can be generated according to the detection result, and if the voltage value of the first voltage detection signal is within the first threshold voltage range, it indicates that the bidirectional switch circuit 750 can be normally off, and the voltage of the common terminal of the bidirectional switch circuit 750 can be detected by the corresponding switch self-checking circuit 760 in the case that the bidirectional switch circuit 750 is controlled to be on, and the corresponding second voltage detection signal can be generated according to the detection result, and if the voltage value of the second voltage detection signal is within the second threshold voltage range, it indicates that the bidirectional switch circuit 750 can be normally on. And the multiple bidirectional switch circuits 750 can be self-checked in turn, when one of the bidirectional switch circuit 750 performs the diagnosis action, the other bidirectional switch circuit 750 works normally, and the fault diagnosis of the bidirectional switch circuit 750 in the normal power supply state can be realized.

[0143] In some embodiments, as shown in FIG. 3, FIG. 4, FIG. 10 and FIG. 13, the second voltage conversion circuit 300 can be connected to the at least one first load supply terminal 411 or the at least one second load supply terminal 421 via the first voltage bus 110, and the battery management circuit 620 can be connected to the at least one first load supply terminal 411 or the at least one second load supply terminal 421 via the second voltage bus 120.

[0144] In some embodiments, as shown in FIG. 14, the bidirectional switch circuit 750 includes a first switch unit 751 and a second switch unit 752, the input terminals of the first switch unit 751 and the second switch unit 752 are connected to the first voltage bus 110 and the second voltage bus 120 respectively, the switch states of the first switch unit 751 and the second switch unit 752 are controlled by the controller 500, and the output terminals of the first switch unit 751 and the second switch unit 752 are connected to the switch self-checking circuit 760.

[0145] In the present embodiment, the output terminals of the first switch unit 751 and the second switch unit 752 are connected to the switch self-checking circuit 760, when the first switch unit 751 and the second switch unit 752 are in the on state, the current of the first voltage bus 110 can flow to the switch self-checking circuit 760 via the first switch unit 751, and the current of the second voltage bus 120 can flow to the switch self-checking circuit 760 via the second switch unit 752. When the controller 500 controls one of the bidirectional switch circuits 750 to perform self-checking, the controller 500 can first control the first switch unit 751 and the second switch unit 752 in the bidirectional switch circuit 750 to be off, then the switch self-checking circuit 760 detects the voltage at the common terminal to obtain a first voltage detection signal, and then the controller 500 can control the first switch unit 751 and the second switch unit 752 to be on, then the switch self-checking circuit 760 detects the voltage at the common terminal to obtain a second voltage detection signal, in this way, the controller 500 can determine the performance of the bidirectional switch circuit 750 based on the first voltage detection signal and the second voltage detection signal.

[0146] In some embodiments, the bidirectional switch circuit 750 includes two unidirectional switches, the output terminals of the two unidirectional switches are connected to the switch self-checking circuit 760, and the input terminals of the two unidirectional switches are connected to the first voltage bus 110 and the second voltage bus 120 respectively.

[0147] In some embodiments, each unidirectional switch is connected in parallel with a diode, the anode of the diode is connected to the output terminal of the corresponding unidirectional switch, and the cathode of the diode is connected to the input terminal of the corresponding unidirectional switch.

[0148] In some embodiments, the at least two switch self-checking circuits 760 can be integrated in the same detection circuit, and the voltage detection end of the detection circuit is connected to the voltage of the common end of each bidirectional switch circuit 750, and generates a corresponding voltage detection signal according to the detection result and outputs to the controller 500. The controller 500 judges the performance of each bidirectional switch circuit 750 in turn according to the switch state of the corresponding bidirectional switch circuit 750 and the received voltage detection signal, and realizes the diagnosis of each bidirectional switch circuit 750.

[0149] In some embodiments, the detection circuit can be connected to the common end of the plurality of bidirectional switch circuits 750 through a plurality of voltage detection ends.

[0150] In some embodiments, the at least two switch self-checking circuits 760 can be integrated in the same controller 500, and the voltage detection pin of the controller 500 is connected to the voltage of the common end of each bidirectional switch circuit 750, and generates a corresponding voltage detection signal according to the detection result and outputs to the controller 500. The controller 500 judges the performance of each bidirectional switch circuit 750 in turn according to the switch state of the corresponding bidirectional switch circuit 750 and the received voltage detection signal, and realizes the diagnosis of each bidirectional switch circuit 750.

[0151] In some embodiments, the controller 500 can be connected to the common end of the plurality of bidirectional switch circuits 750 through a plurality of voltage detection pins.

[0152] In the embodiment, the output end of the first switch unit 751 and the output end of the second switch unit 752 are connected to the switch self-checking circuit 760. When the first switch unit 751 and the second switch unit 752 are in the on state, the current of the first voltage bus 110 can flow to the switch self-checking circuit 760 through the first switch unit 751, and the current of the second voltage bus 120 can flow to the switch self-checking circuit 760 through the second switch unit 752. When the controller 500 controls one of the bidirectional switch circuits 750 to perform self-checking, it can first control the first switch unit 751 and the second switch unit 752 in the bidirectional switch circuit 750 to be disconnected, and then the switch self-checking circuit 760 detects the voltage of the common end to obtain a first voltage detection signal. Then the first switch unit 751 and the second switch unit 752 can be controlled to be turned on, and the switch self-checking circuit 760 detects the voltage of the common end to obtain a second voltage detection signal. In this way, the controller 500 can judge the performance of the bidirectional switch circuit 750 based on the first voltage detection signal and the second voltage detection signal. At the same time, the other bidirectional switch circuits 750 work normally, and the other bidirectional switch circuits 750 can not be controlled by the controller 500, or the controller 500 controls the other bidirectional switch circuits 750 to work normally.

[0153] In some embodiments, when the controller 500 controls one of the bidirectional switch circuits 750 to perform self-checking, the controller 500 can first control the first switch unit 751 and the second switch unit 752 in the bidirectional switch circuit 750 to be turned on, and then the switch self-checking circuit 760 detects the voltage at the common terminal of the first switch unit 751 and the second switch unit 752 to obtain a second voltage detection signal. Then the controller 500 can control the first switch unit 751 and the second switch unit 752 to be turned off, and then the switch self-checking circuit 760 detects the voltage at the common terminal of the first switch unit 751 and the second switch unit 752 to obtain a first voltage detection signal. If the voltage value of the first voltage detection signal is within a first threshold voltage range, it indicates that the bidirectional switch circuit 750 can be normally turned off. If the voltage value of the second voltage detection signal is within a second threshold voltage range, it indicates that the bidirectional switch circuit 750 can be normally turned on. The plurality of bidirectional switch circuits 750 can be checked in turn, and when one of the bidirectional switch circuits 750 performs the diagnostic action, the other bidirectional switch circuit 750 can normally work, so that the fault diagnosis of the bidirectional switch circuit 750 can be realized in the normal power supply state of the circuit.

[0154] In some embodiments, the first threshold voltage range can be -0.1V-0.1V.

[0155] In the present embodiment, when the controller 500 controls the first switch unit 751 and the second switch unit 752 to be turned off, the switch self-checking circuit 760 detects the voltage at the common terminal of the first switch unit 751 and the second switch unit 752 to obtain a first voltage detection signal. If the voltage of the first voltage detection signal is 0V, it indicates that the bidirectional switch circuit 750 can be normally turned off. If the voltage of the first voltage detection signal is not within the first threshold voltage range, for example, the voltage of the first voltage detection signal is 5V or 12V, it indicates that the bidirectional switch circuit 750 cannot be normally turned off.

[0156] In some embodiments, the second threshold voltage range can be determined by the voltage range of the first voltage bus 110 and the second voltage bus 120. For example, the second threshold voltage range can be 11.5V-12.5V, and the second threshold voltage range can also be 23.5V-24.5V.

[0157] In the present embodiment, when the controller 500 controls the first switch unit 751 and the second switch unit 752 to be turned on, the switch self-checking circuit 760 detects the voltage at the common terminal of the first switch unit 751 and the second switch unit 752 to obtain a second voltage detection signal. If the voltage of the second voltage detection signal is 12V, it indicates that the bidirectional switch circuit 750 can be normally turned on. If the voltage of the second voltage detection signal is not within the second threshold voltage range, for example, the voltage of the first voltage detection signal is 5V, it indicates that the bidirectional switch circuit 750 cannot be normally turned on.

[0158] In some embodiments, the controller 500 can control the first switch unit 751 and the second switch unit 752 to be turned on in sequence, so as to separately detect the turn-on performance of the first switch unit 751 and the second switch unit 752. In the case that the first switch unit 751 is turned on, if the switch self-checking circuit 760 detects that the voltage at the common terminal is inconsistent with the voltage of the second voltage detection signal, it indicates that the first switch unit 751 is abnormally turned on. If the switch self-checking circuit 760 detects that the voltage at the common terminal is consistent with the voltage of the first voltage bus 110, it indicates that the first switch unit 751 can be normally turned on.

[0159] In the embodiment, if the difference between the voltage of the second voltage detection signal and the voltage of the first voltage bus 110 is less than the first threshold voltage, it can be indicated that the voltage of the second voltage detection signal is consistent with the voltage of the first voltage bus 110. The first threshold voltage is related to the voltage drop of the first switch unit 751. For example, if the difference between the voltage of the second voltage detection signal and the voltage of the first voltage bus 110 is less than 0.7V, it can be indicated that the voltage of the second voltage detection signal is consistent with the voltage of the first voltage bus 110.

[0160] In some embodiments, referring to FIG. 15, each switch self-checking circuit 760 includes a voltage dividing resistor unit 761, the first end of the voltage dividing resistor unit 761 is connected to the common terminal of the bidirectional switch circuit 750, and the second end of the voltage dividing resistor unit 761 is grounded.

[0161] In the embodiment, the first switch unit 751 and the second switch unit 752 are connected in series with the common terminal of the bidirectional switch circuit 750 through the voltage dividing resistor unit 761, so that the output terminal of the first switch unit 751 is connected with the output terminal of the first switch unit 751 at the switch self-checking circuit 760. When the first switch unit 751 and the second switch unit 752 are in the on state, the current of the first voltage bus 110 can flow to the switch self-checking circuit 760 through the first switch unit 751, and the current of the second voltage bus 120 can flow to the switch self-checking circuit 760 through the first switch unit 751. When the controller 500 controls one of the bidirectional switch circuits 750 to perform self-checking, the controller 500 can first control the first switch unit 751 and the second switch unit 752 in the bidirectional switch circuit 750 to be off, and then the switch self-checking circuit 760 detects the voltage at the common terminal to obtain a first voltage detection signal. Then the controller 500 can control the first switch unit 751 and the second switch unit 752 to be on, and the switch self-checking circuit 760 detects the voltage at the common terminal to obtain a second voltage detection signal. In this way, the controller 500 can determine the performance of the bidirectional switch circuit 750 based on the first voltage detection signal and the second voltage detection signal. At the same time, the other bidirectional switch circuits 750 work normally, and the other bidirectional switch circuits 750 can not be controlled by the controller 500, or the controller 500 controls the other bidirectional switch circuits 750 to work normally.

[0162] In some embodiments, referring to FIG. 16, each switch self-checking circuit 760 includes a detection switch unit 762 connected in series with the voltage dividing resistor unit 761.

[0163] In the embodiment, the detection switch unit 762 can be used to control the start of the switch self-checking circuit 760. Since the detection switch unit 762 is connected in series with the voltage dividing resistor unit 761, when the detection switch unit 762 is off, the voltage dividing resistor unit 761 cannot form a loop. Therefore, the switch self-checking circuit 760 can be turned off when the bidirectional switch circuit 750 works in the non-self-checking mode, so as to reduce the static current and achieve the purpose of reducing the power consumption of the circuit.

[0164] In some embodiments, the switch state of the detection switch unit 762 is controlled by the controller 500.

[0165] In the embodiment, the switch state of the detection switch unit 762 is controlled by the controller 500. The controller 500 can control the corresponding detection switch unit 762 to be turned on according to the user demand, further control the corresponding bidirectional switch circuit 750 to be turned on or turned off, detect the voltage of the common terminal of the corresponding bidirectional switch circuit 750 by the switch self-checking circuit 760, and generate the corresponding voltage detection signal according to the detection result. The controller 500 can actively control the switch state of at least two bidirectional switch circuits 750, and judge the performance of each bidirectional switch circuit 750 according to the switch state of the at least two bidirectional switch circuits 750 and the voltage detection signal, so as to realize the diagnosis of each bidirectional switch circuit 750. When one of the bidirectional switch circuits 750 performs the diagnosis action, the other bidirectional switch circuit 750 normally works, so that the fault diagnosis of the bidirectional switch circuit 750 can be realized in the normal power supply state of the circuit.

[0166] In some embodiments, referring to FIG. 17, the first switch unit 751 includes a first MOS tube Q1, and the first switch unit 751 includes a second MOS tube Q2. The drain of the first MOS tube Q1 is connected to the first voltage bus 110, the source of the first MOS tube Q1 and the source of the second MOS tube Q2 are commonly connected to the corresponding switch self-checking circuit 760, the drain of the second MOS tube Q2 is connected to the second voltage bus 120, and the switch state of the first MOS tube Q1 and the second MOS tube Q2 is controlled by the controller 500.

[0167] In the embodiment, the first MOS tube Q1 and the second MOS tube Q2 are arranged in a back-to-back manner, so that the sources of the first MOS tube Q1 and the second MOS tube Q2 are commonly connected, and the anodes of the parasitic diodes in the first MOS tube Q1 and the second MOS tube Q2 are commonly connected. When the first MOS tube Q1 and the second MOS tube Q2 are controlled by the controller 500 to be turned off, if the switch self-checking circuit 760 detects that the voltage of the source of the first MOS tube Q1 and the second MOS tube Q2 is in the first threshold voltage range, it can be judged that the first MOS tube Q1 and the second MOS tube Q2 can be normally turned off.

[0168] In some embodiments, referring to FIG. 17, the voltage dividing resistor unit 761 includes a first resistor R1, and the first resistor R1 is connected between the common terminal of the corresponding bidirectional switch circuit 750 and the ground.

[0169] In some embodiments, referring to FIG. 17, the detection switch unit 762 includes a first switch K1, and the first switch K1 is connected in series with the voltage dividing resistor unit 761.

[0170] In the embodiment, the first switch K1 can be connected between the common terminal of the bidirectional switch circuit 750 and the voltage dividing resistor unit 761, or connected between the voltage dividing resistor unit 761 and the ground.

[0171] In some embodiments, the first voltage bus 110 is connected to a part of the first load power supply terminal 411 via the first load switch 420 circuit.

[0172] In some embodiments, the second voltage bus 120 is connected to another part of the first load power supply terminal 411 via the second load switch 420 circuit.

[0173] In the embodiment, the first voltage bus 110 can be connected to the first load power supply terminal 411 via the first load switch 420 circuit, and supply power to the connected first load via the first load power supply terminal 411; the second voltage bus 120 is connected to the first load power supply terminal 411 via the second load switch 420 circuit, and supply power to the connected second load via the first load power supply terminal 411; the switch state of the first load switch 420 circuit and the second load switch 420 circuit can be controlled according to the voltage of the first voltage bus 110 and the second voltage bus 120, so as to avoid the problem that the instability of the voltage of the first voltage bus 110 and the second voltage bus 120 causes damage to the connected load.

[0174] In some embodiments, the controller 500 is further configured to control at most one bidirectional switch circuit 750 to work in the diagnostic mode; and the switch self-checking circuit 760 is further configured to detect the voltage of the common terminal of the bidirectional switch circuit 750 when the bidirectional switch circuit 750 works in the diagnostic mode, and generate a corresponding voltage detection signal according to the detection result and output the voltage detection signal to the controller 500.

[0175] In the embodiment, the controller 500 can control at most one bidirectional switch circuit 750 to work in the diagnostic mode, and the other bidirectional switch circuits 750 to work in the non-diagnostic mode. The bidirectional switch circuit 750 working in the diagnostic mode can be turned on and turned off in sequence, and the voltage of the common terminal of the bidirectional switch circuit 750 is detected by the corresponding switch self-checking circuit 760, and a corresponding voltage detection signal is generated according to the detection result, and the controller 500 judges the performance of the bidirectional switch circuit 750 working in the diagnostic mode according to the switch state of the bidirectional switch circuit 750 and the voltage detection signal, so as to realize the diagnosis of the bidirectional switch circuit 750, and when one of the bidirectional switch circuits 750 performs the diagnosis, the other bidirectional switch circuits 750 work in the non-diagnostic mode. Since the other bidirectional switch circuits 750 can work normally, the connection control between the first voltage bus 110 and the second voltage bus 120 is not affected, and the fault diagnosis of the bidirectional switch circuit 750 in the normal power supply state of the circuit can be realized.

[0176] In some embodiments, the controller 500 is further configured to control the first switch unit 751 and the second switch unit 752 to be turned on simultaneously, and then to be turned off simultaneously, in the diagnostic mode.

[0177] In some embodiments, when the controller 500 controls one of the bidirectional switch circuits 750 to perform self-checking, the first switch unit 751 and the second switch unit 752 in the bidirectional switch circuit 750 can be first controlled to be turned on, and then the switch self-checking circuit 760 detects the voltage at the common terminal to obtain a second voltage detection signal. Then the first switch unit 751 and the second switch unit 752 can be controlled to be turned off, and then the switch self-checking circuit 760 detects the voltage at the common terminal to obtain a first voltage detection signal. If the voltage value of the first voltage detection signal is within a first threshold voltage range, it indicates that the bidirectional switch circuit 750 can be normally turned off. If the voltage value of the second voltage detection signal is within a second threshold voltage range, it indicates that the bidirectional switch circuit 750 can be normally turned on. The multiple bidirectional switch circuits 750 can be checked in turn. When one of the bidirectional switch circuits 750 performs the diagnostic action, the other bidirectional switch circuit 750 can normally work, so that the fault diagnosis of the bidirectional switch circuit 750 can be realized in the normal power supply state of the circuit.

[0178] In some embodiments, the controller 500 is further configured to control the first switch unit 751 and the second switch unit 752 to be turned off simultaneously, and then to be turned on simultaneously, in the diagnostic mode.

[0179] In the embodiment, the output end of the first switch unit 751 is connected with the output end of the first switch unit 751 at the switch self-checking circuit 760. When the first switch unit 751 and the second switch unit 752 are in the on state, the current of the first voltage bus 110 can flow to the switch self-checking circuit 760 through the first switch unit 751, and the current of the second voltage bus 120 can flow to the switch self-checking circuit 760 through the first switch unit 751. When the controller 500 controls one of the bidirectional switch circuits 750 to perform self-checking, the first switch unit 751 and the second switch unit 752 in the bidirectional switch circuit 750 can be controlled to be turned off first, and then the first switch unit 751 and the second switch unit 752 are turned on, and the voltage at the common end of the switch self-checking circuit 760 is detected to obtain a first voltage detection signal. Then the first switch unit 751 and the second switch unit 752 are turned on, and the voltage at the common end of the switch self-checking circuit 760 is detected to obtain a second voltage detection signal. In this way, the controller 500 can determine the performance of the bidirectional switch circuit 750 based on the first voltage detection signal and the second voltage detection signal. At the same time, the other bidirectional switch circuits 750 work normally, and the other bidirectional switch circuits 750 can not be controlled by the controller 500, or the controller 500 controls the other bidirectional switch circuits 750 to work normally.

[0180] In some embodiments, the switch self-checking circuit 760 detects the voltage at the common end of the first switch unit 751 and the second switch unit 752 to obtain a first voltage detection signal when the first switch unit 751 and the second switch unit 752 are turned off at the same time; the switch self-checking circuit 760 detects the voltage at the common end of the first switch unit 751 and the second switch unit 752 to obtain a second voltage detection signal when the first switch unit 751 and the second switch unit 752 are turned on at the same time; and the controller 500 is further configured to determine that the first switch unit 751 and the second switch unit 752 are normal when the voltage value of the first voltage detection signal is within a first threshold voltage range and the voltage value of the second voltage detection signal is within a second threshold voltage range.

[0181] In the embodiment, the output end of the first switch unit 751 is connected with the output end of the first switch unit 751 at the switch self-checking circuit 760. When the first switch unit 751 and the second switch unit 752 are in the on state, the current of the first voltage bus 110 can flow to the switch self-checking circuit 760 through the first switch unit 751, and the current of the second voltage bus 120 can flow to the switch self-checking circuit 760 through the first switch unit 751. When the controller 500 controls one of the bidirectional switch circuits 750 to perform self-checking, the first switch unit 751 and the second switch unit 752 in the bidirectional switch circuit 750 can be controlled to be turned off first. Then the switch self-checking circuit 760 detects the voltage at the common end to obtain a first voltage detection signal. If the voltage of the first voltage detection signal is within a first threshold voltage range, it indicates that the first switch unit 751 and the second switch unit 752 can be normally turned off. Then the first switch unit 751 and the second switch unit 752 can be controlled to be turned on. The switch self-checking circuit 760 detects the voltage at the common end to obtain a second voltage detection signal. If the voltage of the second voltage detection signal is within a second threshold voltage range, it indicates that the first switch unit 751 and the second switch unit 752 can be normally turned on. In this way, the controller 500 can judge the performance of the bidirectional switch circuit 750 based on the first voltage detection signal and the second voltage detection signal. In addition, the other bidirectional switch circuits 750 work in the non-diagnostic mode. Since the other bidirectional switch circuits 750 can normally work, the connection control between the first voltage bus 110 and the second voltage bus 120 will not be affected, and the fault diagnosis of the bidirectional switch circuit 750 in the normal power supply state of the circuit can be realized.

[0182] In some embodiments, the detection switch unit 762 is further configured to turn off when the corresponding bidirectional switch circuit 750 exits the diagnostic mode.

[0183] In the embodiment, the detection switch unit 762 can be used to control the start of the switch self-checking circuit 760. Since the detection switch unit 762 is connected in series with the voltage dividing resistor unit 761, when the detection switch unit 762 is turned off, the voltage dividing resistor unit 761 cannot form a loop. In this way, the detection switch unit 762 can be turned off when the bidirectional switch circuit 750 works in the non-self-checking mode, so as to reduce the static current and achieve the purpose of reducing the power consumption of the circuit.

[0184] The embodiment of the present application also provides a power distribution system, which comprises the low-voltage power distribution integrated circuit according to any one of the above embodiments.

[0185] The embodiment of the present application also provides a vehicle, which comprises the low-voltage power distribution integrated circuit according to any one of the above embodiments.

[0186] In some embodiments, the vehicle includes a power battery pack, the power battery pack is connected with the outside of the vehicle via the first voltage conversion circuit to realize charging and discharging, and the power battery pack is connected with the power distribution circuit via the second voltage conversion circuit to realize low-voltage power distribution inside the vehicle. The second voltage conversion circuit is connected with at least one first load power supply end and at least one second load power supply end via the first voltage bus, and the battery management circuit is connected with at least one first load power supply end and at least one second load power supply end via the second voltage bus.

[0187] In the embodiment, the first voltage is converted into the second voltage by the first voltage conversion circuit to charge the power battery pack, or the second voltage provided by the power battery pack is converted into the first voltage for output, the second voltage conversion circuit converts the first voltage or the second voltage provided by the power battery pack into the third voltage, the power distribution circuit receives the third voltage and distributes power to the plurality of load power supply ends; the first voltage conversion circuit, the second voltage conversion circuit and the power distribution circuit share the same controller, so as to integrate the functions of vehicle charging and discharging and low-voltage power distribution in vehicle power supply, improve the integration of the system, reduce the response time of each functional circuit, and reduce the use of wire harness, connector and the like, and reduce the cost.

[0188] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above-mentioned division of functional units and circuits is exemplified, and in actual application, the above-mentioned functions can be completed by different functional units and circuits according to needs, that is, the internal structure of the device is divided into different functional units or circuits to complete all or part of the above-described functions. Each functional unit and circuit in the embodiment can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. In addition, the specific names of each functional unit and circuit are only for the convenience of mutual distinction, and are not used to limit the protection scope of the present application. The specific working process of the units and circuits in the above system can refer to the corresponding process in the foregoing method embodiments, which will not be described here.

[0189] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described or recorded in detail in a certain embodiment can be referred to the related description of other embodiments.

[0190] In the embodiments of the present application, it should be understood that the disclosed device and method can be implemented in other ways. For example, the electronic device embodiments described above are merely illustrative. For example, the division of the circuit or unit is only a logical function division. In actual implementation, another division manner can be used. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interfaces, devices or units, and can be electrical, mechanical or other forms.

[0191] In addition, each function unit in each embodiment of the present application can be integrated into a processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be realized in the form of hardware or in the form of a software function unit.

[0192] The above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalent ones. The modification or replacement does not change the essence of the corresponding technical solutions, and should be included in the protection scope of the present application.

Claims

1. An integrated power supply architecture, wherein, The integrated power supply architecture comprises: a power battery pack; a first voltage conversion circuit, configured to convert an accessed first voltage into a second voltage to charge the power battery pack, or to convert a second voltage provided by the power battery pack into a first voltage to output; a second voltage conversion circuit, connected with the first voltage conversion circuit, configured to convert a second voltage provided by the first voltage conversion circuit or the power battery pack into a third voltage; the third voltage is less than the second voltage; a power distribution circuit, connected with the second voltage conversion circuit, configured to receive the third voltage and distribute power to a plurality of load power supply terminals; the first voltage conversion circuit, the second voltage conversion circuit and the power distribution circuit share a same controller.

2. The integrated power architecture of claim 1, wherein, The integrated power supply architecture further comprises a low-voltage battery and a battery management circuit; the low-voltage battery provides a third voltage to the power distribution circuit through the battery management circuit; the battery management circuit is controlled by the controller to manage charging and discharging of the low-voltage battery.

3. The integrated power architecture of claim 2, wherein, The power distribution circuit comprises a plurality of first load power supply terminals and a plurality of self-recovery overcurrent protection units; the first load power supply terminal is connected with the second voltage conversion circuit or the battery management circuit through the self-recovery overcurrent protection unit; the self-recovery overcurrent protection unit is controlled by the controller.

4. The integrated power architecture of claim 3, wherein, The self-recovery overcurrent protection unit comprises an electronic fuse, which is powered by the second voltage conversion circuit and / or the low-voltage battery.

5. The integrated power architecture of any of claims 1-4, wherein, The power distribution circuit comprises a plurality of second load power supply terminals and a plurality of load switches; the second load power supply terminal is connected with the second voltage conversion circuit or the battery management circuit through the load switch; the load switch is controlled by the controller.

6. The integrated power architecture of claim 5, wherein, The load switch comprises a high-side drive switch chip or a relay.

7. The integrated power architecture of any of claims 1-6, wherein, The first voltage conversion circuit comprises a power factor correction unit and a bidirectional DC / DC conversion unit; the power factor correction unit is controlled by the controller to convert an alternating voltage into a direct voltage in a charging mode, and to convert the direct voltage into an alternating voltage in a discharging mode; the bidirectional DC / DC conversion unit is controlled by the controller to control voltage conversion between the power factor correction unit and the power battery pack.

8. The integrated power architecture of claim 7, wherein, The integrated power supply architecture further comprises: an isolated voltage sampling circuit, configured to sample a direct bus of the power factor correction unit to obtain a voltage sampling signal output to the controller; the controller is further configured to control a working state of the bidirectional DC / DC conversion unit according to the voltage sampling signal.

9. The integrated power architecture of claim 7, wherein, The integrated power supply architecture further comprises: an inductor current sampling circuit, configured to sample an inductor current of the power factor correction unit to obtain an inductor current sampling signal output to the controller; the controller is further configured to control a working state of the power factor correction unit according to the inductor current sampling signal.

10. The integrated power architecture of any of claims 1-9, wherein, The integrated power supply architecture further comprises an external power supply interface and a main relay circuit; the external power supply interface is connected with the first voltage conversion circuit through the main relay circuit; The main relay is connected to the controller through a Darlington transistor, and is controlled by the controller to control the connection state between the external power interface and the first voltage conversion circuit.

11. The integrated power architecture of claim 2, wherein, The integrated power supply architecture further comprises a bidirectional switch circuit. The second voltage conversion circuit is connected to the battery management circuit through the bidirectional switch circuit, and the bidirectional switch circuit is controlled by the controller.

12. The integrated power architecture of claim 11, wherein, The integrated power supply architecture further comprises: A switch self-checking circuit is configured to detect the voltage of the common terminal of the corresponding bidirectional switch circuit, and generate a corresponding voltage detection signal to the controller according to the detection result; The controller is further configured to control the switch state of the bidirectional switch circuit, and determine a switch detection result according to the switch state of the bidirectional switch circuit and the voltage detection signal.

13. The integrated power architecture of claim 12, wherein, The switch self-checking circuit comprises a first switch unit and a second switch unit. The input terminals of the first switch unit and the second switch unit are connected to the second voltage conversion circuit and the battery management circuit, respectively. The switch states of the first switch unit and the second switch unit are controlled by the controller, and the output terminal of the first switch unit and the output terminal of the second switch unit are connected to the switch self-checking circuit.

14. A power supply system, wherein, An integrated power supply architecture as claimed in any one of claims 1-13.

15. A vehicle, wherein, An integrated power supply architecture as claimed in any one of claims 1-13.

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