Vehicle low-voltage hybrid power supply architecture, and automobile

Abstract

A vehicle low-voltage hybrid power supply architecture, and an automobile. A power battery pack (100) comprises at least two battery units connected in series. A power distribution circuit (300) is connected to a first battery set (110) in the power battery pack (100) via a first bidirectional DC DC circuit, and the power distribution circuit (300) is further connected to a second battery set (120) in the power battery pack (100) via a second bidirectional DC DC circuit (220). The first battery set (110) and the second battery set (120) both comprise a portion of battery units in the power battery pack (100). The power distribution circuit (300), controlled by a master control circuit (400), can control the direction of energy transmission between the power battery pack (100), the first battery set (110) and the second battery set (120), and provide different voltages for the first battery set (110) and the second battery set (120). By means of the described power supply architecture, a low-voltage storage battery of the whole vehicle can be removed, and diverse low-voltage power distribution of the vehicle can be achieved by using the power battery pack (100); thus replacement and maintenance of a low-voltage storage battery are not required, and space for a storage battery does not need to be reserved in the whole vehicle structure, facilitating arrangement and simplification of an electronic control system.

Description

Vehicle low-voltage hybrid power supply architecture, automobile

[0001] This application is based on Chinese Patent Application No. 202410706352.2 entitled "Vehicle low-voltage hybrid power supply architecture, automobile" filed on May 31, 2024, which is incorporated by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of automobile technology, in particular to a vehicle low-voltage hybrid power supply architecture and an automobile. BACKGROUND

[0003] The existing vehicle body low-voltage power distribution usually adopts a discrete low-voltage lithium ion battery technology, and a fuse box product is equipped based on a low-voltage storage battery to realize primary power distribution of vehicle loads, and then a battery management system is used to manage the low-voltage lithium ion battery. With the increasing power demand of new energy vehicle intelligence and chassis system, the low-voltage system needs to provide 48V and 12V low-voltage power distribution application requirements. However, in the current vehicle power supply architecture, two independent low-voltage batteries are usually needed to provide corresponding low-voltage, not only the problem of occupying a large space of the vehicle exists, but also regular maintenance and replacement of multiple low-voltage storage batteries are needed, increasing the cost of the vehicle. TECHNICAL PROBLEM

[0004] In view of the above problems, the present application provides a vehicle low-voltage hybrid power supply architecture and an automobile, which can solve the problem that the current vehicle power supply architecture needs two independent low-voltage batteries to provide corresponding low-voltage, faces regular maintenance and replacement of low-voltage storage batteries, and increases the cost of the vehicle. TECHNICAL SOLUTION

[0005] In view of the above problems, the present application provides a vehicle low-voltage hybrid power supply architecture and an automobile, which can solve the problem that the current vehicle power supply architecture needs two independent low-voltage batteries to provide corresponding low-voltage, faces regular maintenance and replacement of low-voltage storage batteries, and increases the cost of the vehicle.

[0006] The first aspect of the embodiment of the present application provides a vehicle low-voltage hybrid power supply architecture, comprising:

[0007] a power battery pack, the power battery pack comprising a first battery group and a second battery group, the first battery group and the second battery group comprising at least one battery cell;

[0008] a first bidirectional DCDC circuit connected with the first battery group;

[0009] a second bidirectional DCDC circuit connected with the second battery group;

[0010] a power distribution circuit connected with the first bidirectional DCDC circuit and the second bidirectional DCDC circuit;

[0011] a master control circuit configured to control the power distribution circuit, the first bidirectional DCDC circuit and the second bidirectional DCDC circuit to regulate the energy transmission direction among the first battery pack, the second battery pack and the power distribution circuit, and the power distribution circuit is controlled by the master control circuit to be the first battery pack and the second battery pack.

[0012] In the technical solution of the embodiment, the vehicle low-voltage hybrid power supply architecture includes a power battery pack, a first bidirectional DCDC circuit, a second bidirectional DCDC circuit, a power distribution circuit and a master control circuit. The power battery pack includes at least two battery cells connected in series. The power distribution circuit is connected to the first battery pack in the power battery pack via the first bidirectional DCDC circuit, and is connected to the second battery pack in the power battery pack via the second bidirectional DCDC circuit. The first battery pack and the second battery pack each include part of the battery cells in the power battery pack. The power distribution circuit is controlled by the master control circuit to control the energy transmission direction among the power battery pack, the first battery pack and the second battery pack, and to provide the required voltage for the first low-voltage load end and the second low-voltage load end, respectively. Through the power supply architecture, the low-voltage storage battery of the vehicle can be cancelled, and the power battery pack can be used to realize various low-voltage power distribution of the vehicle. The low-voltage storage battery does not need to be replaced and maintained, and the space for the storage battery in the vehicle structure does not need to be reserved, which is beneficial to the arrangement and simplification of the electronic control system.

[0013] In some embodiments, the vehicle low-voltage hybrid power supply architecture further includes:

[0014] a DCDC circuit connected between the power battery pack and the power distribution circuit, configured to convert high-voltage power output by the power battery pack into low-voltage power and output to the power distribution circuit under the control of the master control circuit.

[0015] The power distribution circuit is controlled by the master control circuit to control the energy transmission direction between the DCDC circuit and the first battery pack and the energy transmission direction between the DCDC circuit and the second battery pack.

[0016] In the technical scheme of the embodiment of the application, the DCDC circuit controlled by the master control circuit can convert high-voltage power output by the power battery pack into low-voltage power and output to the power distribution circuit, the power distribution circuit controlled by the master control circuit controls the low-voltage power provided by the DCDC circuit to supply power to the first battery pack, and can also control the DCDC circuit to supply power to the second battery pack, and the power distribution circuit can also be controlled by the master control circuit to provide different voltages to the first low-voltage load end and the second low-voltage load end from the DCDC circuit, thereby realizing the energy transmission direction among the DCDC circuit, the first battery pack, the second battery pack and the power battery pack. The scheme in the embodiment cancels the low-voltage storage battery of the whole vehicle, and can cancel the low-voltage storage battery of the whole vehicle and realize various low-voltage power distribution of the vehicle by using the power battery pack, without the replacement and maintenance of the low-voltage storage battery and the reservation of the space of the storage battery in the structure of the whole vehicle, which is beneficial to the arrangement and simplification of the electronic control system.

[0017] In some embodiments, the vehicle low-voltage hybrid power supply architecture further includes:

[0018] A battery management circuit connected with the power battery pack and used for managing charging and discharging of the power battery pack.

[0019] In some embodiments, the DCDC circuit includes:

[0020] A third DCDC circuit connected between the power battery pack and the power distribution circuit and used for converting high-voltage power output by the power battery pack into first voltage and output to the power distribution circuit under the control of the master control circuit.

[0021] In the technical scheme of the embodiment of the application, the third DCDC circuit is connected between the power battery pack and the power distribution circuit, the third DCDC circuit controlled by the master control circuit converts high-voltage power output by the power battery pack into first voltage and outputs to the power distribution circuit, and the power distribution circuit controlled by the master control circuit controls the first voltage provided by the third DCDC circuit to supply power to the first battery pack, and can also control the third DCDC circuit to provide the first voltage to the first low-voltage load end. The scheme in the embodiment cancels the low-voltage storage battery of the whole vehicle, and can cancel the low-voltage storage battery of the whole vehicle and realize various low-voltage power distribution of the vehicle by using the power battery pack, without the replacement and maintenance of the low-voltage storage battery and the reservation of the space of the storage battery in the structure of the whole vehicle, which is beneficial to the arrangement and simplification of the electronic control system.

[0022] In some embodiments, the DCDC circuit further includes:

[0023] A fourth DCDC circuit connected between the power battery pack and the power distribution circuit and used for converting input voltage into second voltage and outputting to the power distribution circuit under the control of the master control circuit; the first voltage is greater than the second voltage.

[0024] In the technical scheme of the embodiment of the application, the fourth DCDC circuit is connected between the power battery pack and the power distribution circuit, the fourth DCDC circuit converts high-voltage power output by the power battery pack into a second voltage and outputs the second voltage to the power distribution circuit, and the power distribution circuit can be controlled by the master control circuit to forward the second voltage to the second low-voltage load end or the second bidirectional DCDC circuit.

[0025] In some embodiments, the DCDC circuit further comprises:

[0026] The fourth DCDC circuit is connected between the third DCDC circuit and the power distribution circuit, and is configured to convert an input voltage into a second voltage and output the second voltage to the power distribution circuit under the control of the master control circuit; the first voltage is greater than the second voltage.

[0027] In the technical scheme of the embodiment of the application, the input end of the fourth DCDC circuit is connected to the output end of the third DCDC circuit, the third DCDC circuit is controlled by the master control circuit to convert high-voltage power output by the power battery pack into a first voltage, the fourth DCDC circuit converts the first voltage output by the third DCDC circuit into a second voltage and outputs the second voltage to the power distribution circuit, and the power distribution circuit can be controlled by the master control circuit to forward the second voltage to the second low-voltage load end or the second bidirectional DCDC circuit.

[0028] In some embodiments, the power distribution circuit comprises:

[0029] The first bidirectional switch unit is connected between the third DCDC circuit and the first bidirectional DCDC circuit and is controlled by the master control circuit to control the energy transmission direction between the third DCDC circuit and the first bidirectional DCDC circuit.

[0030] In some embodiments, the power distribution circuit comprises:

[0031] The second bidirectional switch unit is connected between the fourth DCDC circuit and the second bidirectional DCDC circuit and is controlled by the master control circuit to control the energy transmission direction between the fourth DCDC circuit and the second bidirectional DCDC circuit.

[0032] In some embodiments, the power distribution circuit comprises a first load switch unit, the first load switch unit is connected between the third DCDC circuit and the first low-voltage load end, and the first load switch unit is controlled by the master control circuit to control the connection state between the third DCDC circuit and the first low-voltage load end.

[0033] In some embodiments, the power distribution circuit includes: a second load switch unit connected between the fourth DC-DC circuit and the second low-voltage load terminal, the second load switch unit being controlled by the main control circuit to control the connection state between the fourth DC-DC circuit and the second low-voltage load terminal.

[0034] In some embodiments, the DC-DC circuit includes: a multi-winding integrated transformer, a first voltage conversion circuit, a second voltage conversion circuit, and a third voltage conversion circuit;

[0035] The first winding of the multi-winding integrated transformer is connected to the battery management circuit via the first voltage conversion circuit, the second winding of the multi-winding integrated transformer is connected to the power distribution circuit via the second voltage conversion circuit, and the third winding of the multi-winding integrated transformer is connected to the power distribution circuit via the third voltage conversion circuit.

[0036] In the technical solution of this application embodiment, the operating states of the first voltage conversion circuit, the second voltage conversion circuit, and the third voltage conversion circuit are controlled by the main control circuit. The first voltage conversion circuit is connected between the power battery pack and the first winding, the second voltage conversion circuit is connected between the power distribution circuit and the second winding, and the third voltage conversion circuit is connected between the power distribution circuit and the third winding. This allows the power battery pack to simultaneously generate the first voltage and the second voltage via a multi-winding integrated transformer and output them to the power distribution circuit. The power distribution circuit then provides the first voltage to the first low-voltage load terminal and the second voltage to the second low-voltage load terminal. Furthermore, by controlling the first voltage conversion circuit, the second voltage conversion circuit, and the third voltage conversion circuit... The operating state of the three-voltage conversion circuit can determine the primary and secondary side settings of the first, second, and third windings, thereby adjusting the energy transmission direction between each winding. It can not only realize the function of providing low-voltage power distribution to the entire vehicle from the power battery pack, but also match the current transmission direction between the power battery pack, the first battery pack, and the second battery pack according to the vehicle's power demand. The solution in this embodiment eliminates the need for the vehicle's low-voltage battery, and the power battery pack can be used to realize multiple low-voltage power distributions for the vehicle. There is no need to replace or maintain the low-voltage battery, nor is there any need to reserve space for the battery in the vehicle structure, which is conducive to the layout and simplification of the electronic control system.

[0037] In some embodiments, the main control circuit is further configured to control the power battery pack to replenish the first battery pack via the DCDC circuit, the power distribution circuit, and the first bidirectional DCDC circuit when the charge of the first battery pack is less than a first preset value.

[0038] In some embodiments, the master control circuit is further configured to control the power battery pack to charge the second battery pack via the DCDC circuit, the power distribution circuit and the second bidirectional DCDC circuit when the second battery pack has less than a second preset amount of power.

[0039] In some embodiments, the master control circuit is further configured to control the DCDC circuit to provide a first voltage to the first low-voltage load end and a second voltage to the second low-voltage load end when the battery management circuit outputs high-voltage power.

[0040] The second aspect of the embodiments of the present application provides an automobile comprising the vehicle low-voltage hybrid power supply architecture according to any one of the above embodiments.

[0041] The above description is only a summary of the technical solutions of the present application. In order to enable the technical means of the present application to be more clearly understood, and to be implemented according to the content of the description, and in order to enable the above and other purposes, characteristics and advantages of the present application to be more apparent and easy to understand, the following specific embodiments of the present application are described. Advantages

[0042] In the technical solutions of the embodiments of the present application, the power distribution circuit is connected to the first battery pack in the power battery pack via the first bidirectional DCDC circuit, and the power distribution circuit is connected to the second battery pack in the power battery pack via the second bidirectional DCDC circuit. The first battery pack and the second battery pack each include part of the battery cells in the power battery pack. The power distribution circuit, controlled by the master control circuit, can control the energy transmission direction between the power battery pack, the first battery pack and the second battery pack, and provide different voltages for the first battery pack and the second battery pack, respectively. Through the power supply architecture of the present application, the low-voltage storage battery of the vehicle can be cancelled, and the power battery pack can be used to realize various low-voltage power distribution of the vehicle. The replacement and maintenance of the low-voltage storage battery are not required, and the space for the storage battery in the vehicle structure is not required. This is conducive to the arrangement and simplification of the electronic control system. BRIEF DESCRIPTION OF DRAWINGS

[0043] 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 better understanding of the preferred embodiments, and are not to be considered as limitations on the present application. Moreover, in the entire drawings, the same reference numerals are used to designate the same components. In the drawings:

[0044] FIG. 1 is a first structure schematic diagram of a vehicle low-voltage hybrid power supply architecture provided by the embodiments of the present application;

[0045] FIG. 2 is a second structure schematic diagram of a vehicle low-voltage hybrid power supply architecture provided by the embodiments of the present application;

[0046] FIG. 3 is a third structure schematic diagram of a low-voltage hybrid power supply architecture of a vehicle according to an embodiment of the present application;

[0047] FIG. 4 is a fourth structure schematic diagram of a low-voltage hybrid power supply architecture of a vehicle according to an embodiment of the present application;

[0048] FIG. 5 is a fifth structure schematic diagram of a low-voltage hybrid power supply architecture of a vehicle according to an embodiment of the present application;

[0049] FIG. 6 is a sixth structure schematic diagram of a low-voltage hybrid power supply architecture of a vehicle according to an embodiment of the present application;

[0050] FIG. 7 is a seventh structure schematic diagram of a low-voltage hybrid power supply architecture of a vehicle according to an embodiment of the present application;

[0051] FIG. 8 is an eighth structure schematic diagram of a low-voltage hybrid power supply architecture of a vehicle according to an embodiment of the present application. Embodiments of the present application

[0052] 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.

[0053] 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 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.

[0054] 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.

[0055] 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 locations in the specification, nor is it necessarily 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.

[0056] In the description of the embodiments of the present application, the term "and / or" is only to describe the association relationship of 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 an "or" relationship.

[0057] In the description of the embodiments of the present application, the term "multi-frame" refers to two or more (including two).

[0058] 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 based on 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 indicated device or element 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.

[0059] In the related art, two independent low-voltage batteries are usually required in the vehicle power supply architecture to provide corresponding low voltages, not only the problem of occupying a large space of the vehicle exists, but also regular maintenance and replacement of multiple low-voltage storage batteries are required, increasing the cost of the vehicle.

[0060] In order to solve the above technical problems, the embodiments of the present application provide a vehicle low-voltage hybrid power supply architecture, as shown in FIG. 1, the vehicle low-voltage hybrid power supply architecture includes a power battery pack 100, a first bidirectional DCDC circuit 210, a second bidirectional DCDC circuit 220, a power distribution circuit 300, and a master control circuit 400, wherein the power battery pack 100 includes a first battery pack 110 and a second battery pack 120, the first battery pack 110 and the second battery pack 120 include at least one battery unit, the first bidirectional DCDC circuit 210 is connected with the first battery pack 110, the second bidirectional DCDC circuit 220 is connected with the second battery pack 120, and the voltages at both ends of the first battery pack 110 and the second battery pack 120 are different. The power distribution circuit 300 is connected with the first bidirectional DCDC circuit 210 and the second bidirectional DCDC circuit 220, the master control circuit 400 is used for controlling the power distribution circuit 300, the first bidirectional DCDC circuit 210 and the second bidirectional DCDC circuit 220 to adjust the energy transfer direction between the first battery pack 110, the second battery pack 120 and the power distribution circuit 300, and the power distribution circuit 300 is controlled by the master control circuit 400 for the first battery pack 110 and the second battery pack 120.

[0061] In the embodiment, the power battery pack 100 includes a first battery group 110 and a second battery group 120, the power distribution circuit 300 is connected with the first battery group 110 in the power battery pack 100 via a first bidirectional DCDC circuit 210, and the power distribution circuit 300 is also connected with the second battery group 120 in the power battery pack 100 via a second bidirectional DCDC circuit 220, the first battery group 110 and the second battery group 120 each include part of the battery cells in the power battery pack 100, and the power distribution circuit 300 controlled by the master control circuit 400 can control the energy transmission direction between the power battery pack 100, the first battery group 110 and the second battery group 120, and provide different voltages for the first low-voltage load end 510 and the second low-voltage load end 520, respectively. Through the power supply architecture of the application, the low-voltage storage battery of the whole vehicle can be cancelled, and the power battery pack 100 is used to realize various low-voltage power distribution of the vehicle, and when one of the battery groups is abnormal, the other battery group can also replace the low-voltage power supply, ensuring the stability of the low-voltage power supply inside the vehicle, and without the replacement and maintenance of the low-voltage storage battery, the space for the storage battery in the whole vehicle structure is also not needed, which is beneficial to the arrangement and simplification of the electronic control system.

[0062] In some embodiments, the power battery pack 100 includes a plurality of battery cells, the plurality of battery cells are connected in series, and the first battery group 110 and the second battery group 120 are connected in series.

[0063] In some embodiments, the first battery group 110 and the second battery group 120 have different battery cells, and the number of battery cells in the first battery group 110 and the second battery group 120 is different, and the voltage across the first battery group 110 and the second battery group 120 is different.

[0064] In some embodiments, the first battery group 110 and the second battery group 120 have some same battery cells, and the number of battery cells in the first battery group 110 and the second battery group 120 is different.

[0065] In some embodiments, the first battery group 110 and the second battery group 120 have the same battery cells, and the voltage across the first battery group 110 and the second battery group 120 is the same.

[0066] In some embodiments, the number of battery cells in the first battery group 110 is at least twice the number of battery cells in the second battery group 120.

[0067] In some embodiments, referring to FIG. 2, the vehicle low-voltage hybrid power supply architecture further comprises a DCDC circuit 600 connected between the power battery pack 100 and the power distribution circuit 300, the DCDC circuit 600 being configured to convert high-voltage power output by the power battery pack 100 into low-voltage power output to the power distribution circuit 300 under the control of the master control circuit 400, and the power distribution circuit 300 being configured to control the energy transmission direction between the DCDC circuit 600 and the first battery pack 110 and the energy transmission direction between the DCDC circuit 600 and the second battery pack 120 under the control of the master control circuit 400.

[0068] In the embodiments of the present application, the DCDC circuit 600 can convert high-voltage power output by the power battery pack 100 into low-voltage power output to the power distribution circuit 300 under the control of the master control circuit 400, and the power distribution circuit 300 can control the low-voltage power provided by the DCDC circuit 600 to supplement the first battery pack 110, or control the DCDC circuit 600 to supplement the second battery pack 120, and the power distribution circuit 300 can also be controlled by the master control circuit 400 to provide different voltages to the first low-voltage load end 510 and the second low-voltage load end 520 by the DCDC circuit 600, thereby realizing the energy transmission direction between the DCDC circuit 600, the first battery pack 110, the second battery pack 120, and the power battery pack 100. Through the scheme in the embodiments, the low-voltage storage battery of the whole vehicle can be cancelled, and the power battery pack 100 can be used to realize various low-voltage power distribution of the vehicle, without the need for replacement and maintenance of the low-voltage storage battery, and without the need for reserving space for the storage battery in the structure of the whole vehicle, which is conducive to the arrangement and simplification of the electronic control system.

[0069] In some embodiments, the first bidirectional DCDC circuit 210 is connected between the power battery pack 100 and the power distribution circuit 300, and is configured to realize voltage conversion and power isolation between the first battery pack 110 and the power distribution circuit 300; and the second bidirectional DCDC circuit 220 is connected between the battery pack 110 and the power distribution circuit 300, and is configured to realize voltage conversion and power isolation between the second battery pack 120 and the power distribution circuit 300.

[0070] In the embodiment, the first bidirectional DCDC circuit 210 can convert the voltage output by the first battery pack 110 into a first voltage and output to the power distribution circuit 300, and isolate the power distribution circuit 300 from the first battery pack 110. The second bidirectional DCDC circuit 220 can isolate the power distribution circuit 300 from the second battery pack 120, and convert the output voltage of the battery pack 110 into a second voltage and output to the power distribution circuit 300. In this way, the power distribution circuit 300 can be simultaneously connected to the first battery pack 110 and the second battery pack 120 in the power battery pack 100 via the first bidirectional DCDC circuit 210 and the second bidirectional DCDC circuit 220, respectively, and the power distribution circuit 300 can be provided with a first voltage by the first battery pack 110 and a second voltage by the second battery pack 120, respectively, to realize the function of providing multiple low-voltage power distribution for the whole vehicle by the power battery pack 100. Even if the high-voltage output of the whole vehicle is turned off, the first bidirectional DCDC circuit 210 and the second bidirectional DCDC circuit 220 can be controlled by the master control circuit 400 to provide the required low-voltage power for the whole vehicle by the first battery pack 110 and the second battery pack 120 in the power battery pack 100. And through the scheme in the embodiment, the current transmission direction between the power battery pack 100, the first battery pack 110 and the second battery pack 120 can be matched according to the power demand of the vehicle. When the first battery pack 110 or the second battery pack 120 fails, the high-voltage power can be converted into a first voltage and a second voltage by the DCDC circuit 600 in the power battery pack 100 to supply power to the whole vehicle. In this way, the low-voltage storage battery of the whole vehicle can be cancelled, and there is no need to replace and maintain the low-voltage storage battery, and there is no need to reserve space for the storage battery in the structure of the whole vehicle, which is beneficial to the arrangement and simplification of the electronic control system.

[0071] In some embodiments, the first bidirectional DCDC circuit 210 and the second bidirectional DCDC circuit 220 can be bidirectional voltage conversion circuits. In this way, the working state of the first bidirectional DCDC circuit 210 and the second bidirectional DCDC circuit 220 can be controlled by the master control circuit 400, so as to match the current transmission direction between the power battery pack 100, the first battery pack 110, the second battery pack 120 and the power distribution circuit 300 according to the power demand of the vehicle. Through the scheme in the embodiment, the low-voltage storage battery of the whole vehicle is cancelled, and the low-voltage power distribution of the vehicle is realized by the power battery, without the need to replace and maintain the low-voltage storage battery, and without the need to reserve space for the storage battery in the structure of the whole vehicle, which is beneficial to the arrangement and simplification of the electronic control system.

[0072] In some embodiments, the second bidirectional DCDC circuit 220 can convert the voltage of the second battery pack 120 into a second voltage and output to the power distribution circuit 300, or can receive the voltage input by the power distribution circuit 300 and convert it into a suitable charging voltage to charge the second battery pack 120.

[0073] In some embodiments, referring to FIG. 3, the vehicle low-voltage hybrid power supply architecture further includes a battery management circuit 700 connected to the power battery pack 100, and the battery management circuit 700 is configured to manage charging and discharging of the power battery pack 100.

[0074] In some embodiments, referring to FIG. 4, the DCDC circuit 600 includes a third DCDC circuit 610 connected between the power battery pack 100 and the power distribution circuit 300, and the third DCDC circuit 610 is controlled by the master control circuit 400 to convert high-voltage power output by the power battery pack 100 into a first voltage and output to the power distribution circuit 300.

[0075] In the embodiments of the present application, the third DCDC circuit 610 is connected between the power battery pack 100 and the power distribution circuit 300, and the third DCDC circuit 610 is controlled by the master control circuit 400 to convert high-voltage power output by the power battery pack 100 into a first voltage and output to the power distribution circuit 300, and the power distribution circuit 300 is controlled by the master control circuit 400 to control the first voltage provided by the third DCDC circuit 610 to supply power to the first battery pack 110, and can also control the third DCDC circuit 610 to supply power to the first low-voltage load end 510. Through the scheme in the embodiments, the low-voltage storage battery of the whole vehicle is cancelled, the low-voltage storage battery of the whole vehicle can be cancelled, and the power battery pack 100 is used to realize various low-voltage power distribution of the vehicle, without the need for replacement and maintenance of the low-voltage storage battery, and without the need for reserving space for the storage battery in the structure of the whole vehicle, which is conducive to the arrangement and simplification of the electronic control system.

[0076] In some embodiments, referring to FIG. 5, the DCDC circuit 600 further includes a fourth DCDC circuit 620 connected between the power battery pack 100 and the power distribution circuit 300, and the fourth DCDC circuit 620 is controlled by the master control circuit 400 to convert input voltage into a second voltage and output to the power distribution circuit 300; the first voltage is greater than the second voltage.

[0077] In the embodiments of the present application, the input end of the fourth DCDC circuit 620 is connected to the power battery pack 100, the fourth DCDC circuit 620 converts high-voltage power output by the power battery pack 100 into a second voltage and outputs to the power distribution circuit 300, and the power distribution circuit 300 can be controlled by the master control circuit 400 to forward the second voltage to the second low-voltage load end 520 or the second bidirectional DCDC circuit 220.

[0078] In some embodiments, referring to FIG. 6, the DCDC circuit 600 further includes a fourth DCDC circuit 620 connected between the third DCDC circuit 610 and the power distribution circuit 300, and the fourth DCDC circuit 620 is controlled by the master control circuit 400 to convert input voltage into a second voltage and output to the power distribution circuit 300.

[0079] In the embodiment, the input end of the fourth DCDC circuit 620 is connected to the output end of the third DCDC circuit 610, and the third DCDC circuit 610 is controlled by the master control circuit 400 to convert the high-voltage power output by the power battery pack 100 into a first voltage, and the fourth DCDC circuit 620 converts the first voltage output by the third DCDC circuit 610 into a second voltage and outputs the second voltage to the power distribution circuit 300, the first voltage is greater than the second voltage, and the power distribution circuit 300 can be controlled by the master control circuit 400 to forward the second voltage to the second low-voltage load end 520 or the second bidirectional DCDC circuit 220.

[0080] In some embodiments, referring to FIG. 7, the power distribution circuit 300 includes a first bidirectional switching unit connected between the third DCDC circuit 610 and the first bidirectional DCDC circuit 210, and the first bidirectional switching unit is controlled by the master control circuit 400 to control the energy transmission direction between the third DCDC circuit 610 and the first bidirectional DCDC circuit 210.

[0081] In the embodiment, the first bidirectional switching unit is connected between the third DCDC circuit 610 and the first bidirectional DCDC circuit 210, and the first bidirectional switching unit can be controlled by the master control circuit 400 to control the third DCDC circuit 610 to output a first voltage to the DCDC circuit 600, the first bidirectional DCDC circuit 210 is used to realize voltage conversion between the first battery pack 110 and the power distribution circuit 300, and the first bidirectional DCDC circuit 210 can be controlled by the master control circuit 400 to convert the first voltage into a high voltage to charge the first battery pack 110.

[0082] In some embodiments, the first bidirectional switching unit 310 can include two MOSFETs arranged in opposition, and by controlling the switching state of the two MOSFETs arranged in opposition, the energy transmission direction between the first bidirectional DCDC circuit 210 and the third DCDC circuit 610 can be controlled.

[0083] In some embodiments, referring to FIG. 7, the first bidirectional switching unit 310 includes a first electronic switch Q1 and a second electronic switch Q2, and the first electronic switch Q1 and the second electronic switch Q2 are arranged in opposition.

[0084] In some embodiments, the first electronic switch Q1 and the second electronic switch Q2 are both MOSFETs, and the source electrodes of the first electronic switch Q1 and the second electronic switch Q2 are connected in common, or the drain electrodes thereof are connected in common.

[0085] In some embodiments, referring to FIG. 7, the power distribution circuit 300 comprises a second bidirectional switch unit 320 connected between the fourth DCDC circuit 620 and the second bidirectional DCDC circuit 220, and the second bidirectional switch unit 320 is controlled by the master control circuit 400 to control the energy transmission direction between the fourth DCDC circuit 620 and the second bidirectional DCDC circuit 220.

[0086] In the present embodiment, the second bidirectional switch unit 320 is connected between the fourth DCDC circuit 620 and the second bidirectional DCDC circuit 220, and the second bidirectional switch unit 320 can be controlled by the master control circuit 400 to control the fourth DCDC circuit 620 to output the second voltage to the second bidirectional DCDC circuit 220, and the second bidirectional DCDC circuit 220 can be controlled by the master control circuit 400 to convert the second voltage into a high voltage to charge the second battery pack 120.

[0087] In some embodiments, referring to FIG. 7, the second bidirectional switch unit 320 comprises a third electronic switch Q3 and a fourth electronic switch Q4, and the third electronic switch Q3 and the fourth electronic switch Q4 are arranged in a top-to-top manner.

[0088] In some embodiments, the third electronic switch Q3 and the fourth electronic switch Q4 are both MOSFETs, and the source electrodes of the third electronic switch Q3 and the fourth electronic switch Q4 are connected in common, or the drain electrodes of the third electronic switch Q3 and the fourth electronic switch Q4 are connected in common.

[0089] In some embodiments, referring to FIG. 7, the power distribution circuit 300 comprises a first load switch unit T1 connected between the third DCDC circuit 610 and the first low-voltage load end 510, and the first load switch unit T1 is controlled by the master control circuit 400 to control the connection state between the third DCDC circuit 610 and the first low-voltage load end 510.

[0090] In the present embodiment, the first load switch unit T1 is controlled by the master control circuit 400 to control the connection state between the third DCDC circuit 610 and the first low-voltage load end 510, and in the case that the first load switch unit T1 is turned on, the third DCDC circuit 610 provides the first voltage to the first low-voltage load end 510 via the first load switch unit T1. In the case that the third DCDC circuit 610 stops working, the first bidirectional DCDC circuit 210 can also convert the voltage of the first battery pack 110 into the first voltage and provide the first voltage to the first low-voltage load end 510 via the first load switch unit T1.

[0091] In some embodiments, referring to FIG. 7, the power distribution circuit 300 comprises a second load switch unit T2 connected between the fourth DCDC circuit 620 and the second low-voltage load end 520, and the second load switch unit T2 is controlled by the master control circuit 400 to control the connection state between the fourth DCDC circuit 620 and the second low-voltage load end 520.

[0092] In the present embodiment, the second load switch unit T2 is controlled by the master control circuit 400 to control the connection state between the third DCDC circuit 610 and the first low-voltage load end 510, and in the case that the first load switch unit T1 is turned on, the third DCDC circuit 610 provides the first voltage to the first low-voltage load end 510 via the first load switch unit T1. In the case that the third DCDC circuit 610 stops working, the first bidirectional DCDC circuit 210 can also convert the voltage of the first battery pack 110 into the first voltage and provide the first voltage to the first low-voltage load end 510 via the first load switch unit T1.

[0093] In some embodiments, the first low-voltage load end 510 can be connected to the vehicle interior comfort type load, such as the air conditioner, seat heating and other functional loads, and the second low-voltage load end 520 can be connected to the vehicle interior safety control type load, such as the car controller, light, steering, brake and other functional loads.

[0094] In some embodiments, the first load switch unit T1 can comprise a plurality of electronic switches connected to a plurality of first loads respectively.

[0095] In some embodiments, the second load switch unit T2 can comprise a plurality of electronic switches connected to a plurality of second loads respectively.

[0096] In the present embodiment, the first load can be the air conditioner, seat heating and other functional loads, and the second load can be the car controller, light, steering, brake and other functional loads.

[0097] In some embodiments, the first load switch unit T1 and the second load switch unit T2 can be MOSFET or IGBT.

[0098] When the vehicle starts, the first bidirectional switch unit 310 is turned on, the first battery pack 110 outputs the first voltage through the first bidirectional DCDC circuit 210 to supply power to the first low-voltage load end 510, thereby supplying power to the vehicle interior driving safety category controller, and then the main positive relay and the main negative relay in the battery management circuit 700 are closed, the third DCDC circuit 610 is started, the third DCDC circuit 610 converts the high-voltage power output by the power battery pack 100 into the first voltage and outputs the first voltage to the first low-voltage load end 510, and the vehicle is powered on.

[0099] In some embodiments, referring to FIG. 8, the DCDC circuit 600 comprises a multi-winding integrated transformer T0, a first voltage conversion circuit 631, a second voltage conversion circuit 632, and a third voltage conversion circuit 633, a first winding of the multi-winding integrated transformer T0 is connected to the battery management circuit 700 via the first voltage conversion circuit 631, a second winding of the multi-winding integrated transformer T0 is connected to the power distribution circuit 300 via the second voltage conversion circuit 632, and a third winding of the multi-winding integrated transformer T0 is connected to the power distribution circuit 300 via the third voltage conversion circuit 633.

[0100] In the embodiments of the present application, the working states of the first voltage conversion circuit 631, the second voltage conversion circuit 632, and the third voltage conversion circuit 633 are controlled by the master control circuit 400, the first voltage conversion circuit 631 is connected between the power battery pack 100 and the first winding, the second voltage conversion circuit 632 is connected between the power distribution circuit 300 and the second winding, and the third voltage conversion circuit 633 is connected between the power distribution circuit 300 and the third winding, so that the power battery pack 100 can simultaneously generate the first voltage and the second voltage and output them to the power distribution circuit 300 via the multi-winding integrated transformer T0, and the power distribution circuit 300 can provide the first voltage for the first low-voltage load end 510 and the second voltage for the second low-voltage load end 520, respectively. By controlling the working states of the first voltage conversion circuit 631, the second voltage conversion circuit 632, and the third voltage conversion circuit 633, the primary side and the secondary side of the first winding, the second winding, and the third winding can be determined, so as to adjust the energy transmission direction between the windings. Not only can the function of providing low-voltage power distribution for the whole vehicle by the power battery pack 100 be realized, but also the current transmission direction between the power battery pack 100, the first battery pack 110, and the second battery pack 120 can be matched according to the power demand of the vehicle. The low-voltage storage battery of the whole vehicle can be cancelled by the scheme in the embodiments, and the low-voltage storage battery of the whole vehicle can be cancelled, and the power distribution of the vehicle can be realized by the power battery pack 100, without the replacement and maintenance of the low-voltage storage battery, and without reserving the space of the storage battery in the structure of the whole vehicle, which is beneficial to the arrangement and simplification of the electronic control system.

[0101] In some embodiments, the DCDC converter with three ports is composed of the first voltage conversion circuit 631, the second voltage conversion circuit 632, the third voltage conversion circuit 633, and the multi-winding integrated transformer T0, the first voltage and the second voltage can be obtained by the power battery pack 100, the power distribution scheme of the vehicle without the low-voltage battery can be realized by multiplexing the power battery pack 100, and the pre-charging relay and the pre-charging resistor can be omitted in the power supply architecture of the vehicle, so as to reduce the cost of the power supply architecture of the vehicle.

[0102] In the embodiment, the power distribution circuit 300 is connected to the second winding of the multi-winding integrated transformer T0 via the second voltage conversion circuit 632, and the power distribution circuit 300 is connected to the third winding of the multi-winding integrated transformer T0 via the third voltage conversion circuit 633, wherein the second winding and the third winding can convert the high-voltage power of the power battery pack 100 into low-voltage power as secondary windings, and can obtain the first voltage via the second voltage conversion circuit 632 and the second voltage via the third voltage conversion circuit 633, respectively, and can achieve a state switching time of 100 microseconds (us) level based on the multi-winding transformer, and the switching rate is much higher than the switching time of 10 microseconds (us) level of the relay.

[0103] In some embodiments, the first voltage conversion circuit 631 can be a full-bridge rectification inverter circuit.

[0104] In some embodiments, the second voltage conversion circuit 632 can be a full-bridge rectification inverter circuit.

[0105] In some embodiments, the third voltage conversion circuit 633 can be a full-bridge rectification inverter circuit.

[0106] In the embodiment, the first voltage conversion circuit 631 and the second voltage conversion circuit 632 can be full-bridge rectification inverter circuits, and the first voltage conversion circuit 631 controlled by the master control circuit 400 can convert the direct current output by the power battery pack 100 into alternating current and output to the first winding of the multi-winding integrated transformer T0, and at this time, the first winding can be the primary winding of the multi-winding integrated transformer T0, and the first voltage conversion circuit 631 can also be controlled by the master control circuit 400 to convert the alternating current output by the first winding of the multi-winding integrated transformer T0 into direct current and output to both ends of the power battery pack 100, and at this time, the first winding can be the secondary winding of the multi-winding integrated transformer T0.

[0107] The second voltage conversion circuit 632 controlled by the master control circuit 400 can convert the alternating current output by the multi-winding integrated transformer T0 into direct current and output to the power distribution circuit 300, and at this time, the second winding can be the secondary winding of the multi-winding integrated transformer T0, and the second voltage conversion circuit 632 can also be controlled by the master control circuit 400 to convert the low-voltage power output by the power distribution circuit 300 into alternating current and output to the power battery pack 100 via the second winding, so as to achieve the purpose of pre-charging the power battery pack 100.

[0108] In some embodiments, the first voltage conversion circuit 631 can be a half-bridge rectification inverter circuit.

[0109] In some embodiments, the second voltage conversion circuit 632 can be a half-bridge rectification inverter circuit.

[0110] In some embodiments, the third voltage conversion circuit 633 can be a half-bridge rectifier inverter circuit.

[0111] In the present embodiment, by setting the second voltage conversion circuit 632 and the third voltage conversion circuit 633 as a half-bridge rectifier inverter circuit, the conversion efficiency of the second winding and the third winding of the multi-winding integrated transformer T0 can be improved, and it is more suitable for low-voltage and large-current application scenarios. In the present embodiment, the second voltage conversion circuit 632 controlled by the master control circuit 400 can convert the alternating current output by the second winding into direct current and output to the power distribution circuit 300, and the third voltage conversion circuit 633 controlled by the master control circuit 400 can convert the alternating current output by the third winding into direct current and output to the power distribution circuit 300. Not only can the function of providing low-voltage power distribution for the whole vehicle by the power battery pack 100 be realized, but also the current transmission direction between the power battery pack 100, the first battery pack 110, the second battery pack 120, and the power distribution circuit 300 can be matched according to the vehicle power demand. By the scheme in the present embodiment, the low-voltage storage battery of the whole vehicle is cancelled, and the low-voltage power distribution of the vehicle is realized by using the power battery, without the need for replacement and maintenance of the low-voltage storage battery, and without the need for reserving space for the storage battery in the structure of the whole vehicle, which is conducive to the arrangement and simplification of the electronic control system.

[0112] In some embodiments, the first winding of the multi-winding integrated transformer T0 and the first voltage conversion circuit 631 can not need to be provided with a resonant inductor. By controlling the working mode of the second voltage conversion circuit 632 and the third voltage conversion circuit 633, leakage inductance is generated in the first winding of the multi-winding integrated transformer T0, thereby replacing the resonant inductor between the first winding of the multi-winding integrated transformer T0 and the first voltage conversion circuit 631.

[0113] In some embodiments, the second winding of the multi-winding integrated transformer T0 and the second voltage conversion circuit 632 can not need to be provided with a resonant inductor. By controlling the working mode of the third voltage conversion circuit 633, the third winding and the fourth winding of the multi-winding integrated transformer T0 are connected in series, thereby generating leakage inductance in the second winding of the multi-winding integrated transformer T0, thereby replacing the resonant inductor between the second winding of the multi-winding integrated transformer T0 and the second voltage conversion circuit 632.

[0114] In some embodiments, the first winding can be connected to the first voltage conversion circuit 631 via a first resonant inductor unit.

[0115] In some embodiments, the second winding can be connected to the second voltage conversion circuit 632 via a second resonant inductor unit.

[0116] In the embodiment, two ends of the first winding of the multi-winding integrated transformer T0 are connected to the positive and negative poles of the power battery pack 100 via the first voltage conversion circuit 631, and two ends of the second winding of the multi-winding integrated transformer T0 are connected to the first load switch unit T1 via the second voltage conversion circuit 632. The third winding of the multi-winding integrated transformer T0 is connected to the second load switch unit T2 via the third voltage conversion circuit 633. When the power battery pack 100 in the vehicle outputs a high voltage, the second winding and the third winding of the multi-winding integrated transformer T0 output low-voltage alternating current, and the first voltage conversion circuit 632 outputs a first voltage to the first load switch unit T1 via the second voltage conversion circuit 632, and the second voltage conversion circuit 633 outputs a second voltage to the second load switch unit T2 via the third voltage conversion circuit 633.

[0117] In some embodiments, two ends of the second winding of the multi-winding integrated transformer T0 are connected to the power distribution circuit 300 via the second voltage conversion circuit 632. The second voltage conversion circuit 632 is a smaller power module, and the power thereof can be a hundred-watt level. Before the high voltage output by the power battery pack 100 is powered on, the second voltage conversion circuit 632 can not only supply power to the power distribution circuit 300 of the vehicle, but also perform pre-charging processing for the closure of the total positive relay K11 of the power battery pack 100.

[0118] In some embodiments, the master control circuit 400 is further configured to control the power battery pack 100 to supply power to the first battery pack 110 via the DCDC circuit 600, the power distribution circuit 300, and the first bidirectional DCDC circuit 210 when the power of the first battery pack 110 is less than the first preset value.

[0119] In the embodiment, the first battery pack 110 includes at least one battery cell. When the power of the first battery pack 110 is less than the first preset value, the power distribution circuit 300 can output a first voltage to the first bidirectional DCDC circuit 210. At this time, the first bidirectional DCDC circuit 210 converts the received first voltage into an adaptive voltage to charge the first battery pack 110.

[0120] In some embodiments, the master control circuit 400 is further configured to control the power battery pack 100 to supply power to the second battery pack 120 via the DCDC circuit 600, the power distribution circuit 300, and the second bidirectional DCDC circuit 220 when the power of the second battery pack 120 is less than the second preset value.

[0121] In the embodiment, the second battery pack 120 includes at least one battery cell. When the power of the second battery pack 120 is less than the second preset value, the power distribution circuit 300 can output a second voltage to the second bidirectional DCDC circuit 220. At this time, the second bidirectional DCDC circuit 220 converts the received second voltage into an adaptive voltage to charge the second battery pack 120.

[0122] In some embodiments, the master control circuit 400 is further configured to control the DCDC circuit 600 to provide the first voltage to the first low-voltage load end 510 and the second voltage to the second low-voltage load end 520 when the battery management circuit 700 outputs high-voltage electricity.

[0123] In some embodiments, referring to FIG. 7, the battery management circuit 700 can include a total positive relay K11 and a total negative relay K12. When the total positive relay K11 and the total negative relay K12 are closed, the power battery pack 100 outputs high-voltage electricity, and the vehicle is powered by the power battery pack 100 in the charging, driving, and parking states.

[0124] In some embodiments, referring to FIG. 7, the battery management circuit 700 can include a pre-charge relay K21 and a pre-charge resistor R0. The pre-charge relay K21 and the pre-charge resistor R0 are connected in series and are connected in parallel with the main positive relay K11.

[0125] In some embodiments, the first voltage output by the first bidirectional DCDC circuit 210 to the power distribution circuit 300 can be 48V.

[0126] In some embodiments, the second voltage output by the second bidirectional DCDC circuit 220 to the power distribution circuit 300 can be 12V.

[0127] In some embodiments, the master control circuit 400 is further configured to control the DCDC circuit 600 to convert high-voltage electricity output by the power battery pack 100 into the first voltage when the amount of electricity of the first battery group 110 is less than the first preset value, and to charge the first battery group 110 via the power distribution circuit 300.

[0128] In this embodiment, after the vehicle high-voltage power-up is completed and normal work is started, the DCDC circuit 600 converts high-voltage electricity output by the power battery pack 100 into the first voltage to supply power to the first low-voltage load end 510 in the power distribution circuit 300, and the DCDC circuit 600 converts high-voltage electricity output by the power battery pack 100 into the second voltage to supply power to the second low-voltage load end 520 in the power distribution circuit 300. The battery management system requests voltage and current from the first bidirectional DCDC circuit 210 according to the voltage of the battery unit in the first battery group 110, and realizes charging and balancing of the first battery group 110 in the power battery pack 100.

[0129] In some embodiments, when the third DCDC circuit 610, the high-voltage loop (such as a relay, a high-voltage connector, a non-start-stop battery cell, etc.) fails, the first bidirectional DCDC circuit 210 can quickly start and access the low-voltage load loop when the vehicle is normally running, and the first bidirectional DCDC circuit 210 converts the voltage of the first battery pack 110 into the first voltage to be intelligently distributed by the power distribution circuit 300, and only powers the vehicle safety loads such as brakes, steering, warning lights, etc., to ensure the user's basic steering and parking safety operation.

[0130] In some embodiments, when the fourth DCDC circuit 620, the high-voltage loop (such as a relay, a high-voltage connector, a non-start-stop battery cell, etc.) fails, the second bidirectional DCDC circuit 220 converts the voltage of the second battery pack 120 into the second voltage to be intelligently distributed by the power distribution circuit 300, and the second low-voltage load end 520 can only power the vehicle safety loads such as brakes, steering, warning lights, etc., to ensure the user's basic steering and parking safety operation.

[0131] In some embodiments, the output voltage range of the first battery pack 110 is 24V-72V.

[0132] In some embodiments, the second battery pack 120 includes a 12-volt lithium-ion battery or a sodium-ion battery, or other rechargeable batteries.

[0133] In some embodiments, the second battery pack 120 includes a 24-volt lithium-ion battery or a sodium-ion battery, or other rechargeable batteries.

[0134] In some embodiments, the second battery pack 120 includes a 48-volt lithium-ion battery or a sodium-ion battery, or other rechargeable batteries.

[0135] In some embodiments, the second battery pack 120 includes a 72-volt lithium-ion battery or a sodium-ion battery, or other rechargeable batteries.

[0136] In some embodiments, the first battery pack 110 includes a 24-volt lithium-ion battery or a sodium-ion battery, or other rechargeable batteries.

[0137] In some embodiments, the first battery pack 110 includes a 48-volt lithium-ion battery or a sodium-ion battery, or other rechargeable batteries.

[0138] In some embodiments, the first battery pack 110 includes a 72-volt lithium-ion battery or a sodium-ion battery, or other rechargeable batteries.

[0139] In the embodiment, the vehicle low-voltage hybrid power supply architecture in the embodiment can be applied to a new energy vehicle, wherein the output voltage of the battery pack 110 in the power battery pack 100 does not exceed 72V.

[0140] The embodiment also provides a vehicle management system, which comprises the vehicle low-voltage hybrid power supply architecture in any one of the above embodiments.

[0141] The embodiment also provides an automobile, which comprises the vehicle low-voltage hybrid power supply architecture in any one of the above embodiments.

[0142] In the embodiment, by integrating the vehicle low-voltage hybrid power supply architecture in any one of the above embodiments in the automobile, the DCDC circuit 600, the power distribution circuit 300 and the master control circuit 400 can be integrated into one structural member, and the DCDC circuit 600 and the power distribution circuit 300 share one controller, so that the electrical architecture of the vehicle management system is optimized, the related components of the automobile are simplified, and the cost of the automobile is greatly reduced.

[0143] In the embodiment, the power battery pack 100 comprises at least two battery units connected in series, the power distribution circuit 300 is connected with the first battery pack 110 in the power battery pack 100 via the first bidirectional DCDC circuit 210, the power distribution circuit 300 is also connected with the second battery pack 120 in the power battery pack 100 via the second bidirectional DCDC circuit 220, the first battery pack 110 and the second battery pack 120 each comprise part of the battery units in the power battery pack 100, the power distribution circuit 300 controlled by the master control circuit 400 can control the energy transmission direction among the power battery pack 100, the first battery pack 110 and the second battery pack 120, and provide different voltages for the first battery pack 110 and the second battery pack 120, respectively. By using the power supply architecture, the low-voltage storage battery of the automobile can be cancelled, the power battery pack 100 can be used to realize various low-voltage power distribution of the vehicle, the replacement and maintenance of the low-voltage storage battery are not needed, and the space for the storage battery in the automobile structure is not needed, which is beneficial to the arrangement and simplification of the electronic control system.

[0144] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above functional units and modules is taken as an example for description, and in actual application, the above functions can be completed by different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. In addition, the specific names of each functional unit and module are only for easy distinction, and do not limit the protection scope of the present application. The specific working process of the units and modules in the system can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

[0145] 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.

[0146] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the electronic device embodiments described above are only schematic. For example, the division of the modules or units is only a logical function division, and actual implementation can have another division manner, 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 shown or discussed each other can be indirect coupling or communication connection through some interfaces, devices or units, and can be electrical, mechanical or other forms.

[0147] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0148] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of software functional unit.

[0149] The above examples are only used to illustrate the technical solutions of the present application, but not limit the same; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can be modified, or some technical features can be replaced by equivalent ones; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A low-voltage hybrid power supply architecture for vehicles, wherein, include: A power battery pack, the power battery pack including a first battery pack and a second battery pack, the first battery pack and the second battery pack including at least one battery cell; A first bidirectional DC-DC circuit is connected to the first battery pack; A second bidirectional DC-DC circuit is connected to the second battery pack; The power distribution circuit connects the first bidirectional DC-DC circuit and the second bidirectional DC-DC circuit; The main control circuit is used to control the power distribution circuit, the first bidirectional DC-DC circuit and the second bidirectional DC-DC circuit to adjust the energy transfer direction between the first battery pack, the second battery pack and the power distribution circuit, and the power distribution circuit is controlled by the main control circuit to supply power to the first low-voltage load terminal and the second low-voltage load terminal.

2. The vehicle low-voltage hybrid power supply architecture according to claim 1, wherein, The vehicle low-voltage hybrid power supply architecture also includes: A DC-DC circuit is connected between the power battery pack and the power distribution circuit, and is used to convert the high voltage output of the power battery pack into low voltage power output to the power distribution circuit under the control of the main control circuit. The power distribution circuit is controlled by the main control circuit, which controls the energy transfer direction between the DC-DC circuit and the first battery pack, as well as the energy transfer direction between the DC-DC circuit and the second battery pack.

3. The vehicle low-voltage hybrid power supply architecture according to claim 1, wherein, The vehicle low-voltage hybrid power supply architecture also includes: A battery management circuit, connected to the power battery pack, is used to manage the charging and discharging of the power battery pack.

4. The vehicle low-voltage hybrid power supply architecture according to claim 2, wherein, The DC-DC circuit includes: The third DC-DC circuit is connected between the power battery pack and the power distribution circuit, and is controlled by the main control circuit to convert the high voltage output from the power battery pack into a first voltage and output it to the power distribution circuit.

5. The vehicle low-voltage hybrid power supply architecture according to claim 4, wherein, The DC-DC circuit also includes: The fourth DC-DC circuit is connected between the power battery pack and the power distribution circuit, and is used to convert the input voltage into a second voltage and output it to the power distribution circuit under the control of the main control circuit; the first voltage is greater than the second voltage.

6. The vehicle low-voltage hybrid power supply architecture according to claim 4, wherein, The DC-DC circuit also includes: The fourth DC-DC circuit is connected between the third DC-DC circuit and the power distribution circuit, and is controlled by the main control circuit to convert the input voltage into a second voltage and output it to the power distribution circuit; the first voltage is greater than the second voltage.

7. The vehicle low-voltage hybrid power supply architecture according to claim 4, wherein, The power distribution circuit includes: The first bidirectional switching unit is connected between the third DC-DC circuit and the first bidirectional DC-DC circuit, and is controlled by the main control circuit to control the energy transfer direction between the third DC-DC circuit and the first bidirectional DC-DC circuit.

8. The vehicle low-voltage hybrid power supply architecture according to claim 5 or 6, wherein, The power distribution circuit includes: The second bidirectional switching unit is connected between the fourth DC-DC circuit and the second bidirectional DC-DC circuit, and is controlled by the main control circuit to control the energy transfer direction between the fourth DC-DC circuit and the second bidirectional DC-DC circuit.

9. The vehicle low-voltage hybrid power supply architecture according to claim 4, wherein, The power distribution circuit includes: a first load switch unit, which is connected between the third DC-DC circuit and the first low-voltage load terminal. The first load switch unit is controlled by the main control circuit to control the connection state between the third DC-DC circuit and the first low-voltage load terminal.

10. The vehicle low-voltage hybrid power supply architecture according to claim 5 or 6, wherein, The power distribution circuit includes a second load switch unit, which is connected between the fourth DC-DC circuit and the second low-voltage load terminal. The second load switch unit is controlled by the main control circuit to control the connection state between the fourth DC-DC circuit and the second low-voltage load terminal.

11. The vehicle low-voltage hybrid power supply architecture according to claim 2, wherein, The DC-DC circuit includes: a multi-winding integrated transformer, a first voltage conversion circuit, a second voltage conversion circuit, and a third voltage conversion circuit; The first winding of the multi-winding integrated transformer is connected to the battery management circuit via the first voltage conversion circuit, the second winding of the multi-winding integrated transformer is connected to the power distribution circuit via the second voltage conversion circuit, and the third winding of the multi-winding integrated transformer is connected to the power distribution circuit via the third voltage conversion circuit.

12. The vehicle low-voltage hybrid power supply architecture according to any one of claims 2-11, wherein, The main control circuit is also used to control the power battery pack to replenish the first battery pack via the DCDC circuit, the power distribution circuit and the first bidirectional DCDC circuit when the power of the first battery pack is less than a first preset value.

13. The vehicle low-voltage hybrid power supply architecture according to any one of claims 2-11, wherein, The main control circuit is also used to control the power battery pack to replenish the second battery pack via the DCDC circuit, the power distribution circuit and the second bidirectional DCDC circuit when the power of the second battery pack is less than the second preset value.

14. The vehicle low-voltage hybrid power supply architecture according to any one of claims 2-11, wherein, The main control circuit is also used to control the DCDC circuit to provide a first voltage to the first low-voltage load terminal and a second voltage to the second low-voltage load terminal when the battery management circuit outputs high voltage.

15. A type of automobile, wherein, The vehicle includes a vehicle low-voltage hybrid power supply architecture as described in any one of claims 1 to 14.

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