Low voltage battery distribution architecture, automotive

Abstract

The present application discloses a low-voltage battery power distribution architecture and a vehicle, wherein a first battery pack includes at least two battery cells connected in series in sequence, a second battery pack includes some battery cells in the first battery pack, a first DCDC circuit is used to realize conversion between a first voltage and a second voltage, and a power distribution circuit can provide a first voltage to a first low-voltage load terminal and a second voltage to a second low-voltage load terminal according to at least one of the first battery pack, the second battery pack and the first DCDC circuit, and the power distribution circuit and the first DCDC circuit are controlled by a main control circuit so that the power distribution circuit provides corresponding voltages to the first low-voltage load terminal and the second low-voltage load terminal. Through the power supply architecture of the present application, a single low-voltage battery can be used to provide a variety of required low voltages for the vehicle, without the need for regular maintenance and replacement of multiple low-voltage batteries, which is conducive to reducing the space occupied by the battery and the layout and simplification of the electronic control system.

Description

Technical Field

[0001] The present application relates to the field of automobile technology, and in particular to a low-voltage battery power distribution architecture and an automobile. Background Art

[0002] The existing low-voltage power distribution of the vehicle body usually adopts discrete low-voltage lithium-ion battery technology, and uses low-voltage batteries equipped with fuse box products to achieve primary power distribution for vehicle loads, and then the battery management system manages the low-voltage lithium-ion battery. With the increasing power requirements of new energy vehicles such as intelligent and chassis systems, the low-voltage system needs to provide 48V and 12V low-voltage power distribution applications.

[0003] However, in order to provide 48V and 12V low-voltage power distribution, the current vehicle power supply architecture usually requires two independent low-voltage batteries to provide the corresponding low voltages respectively. This not only takes up a lot of space in the vehicle, but also requires regular maintenance and replacement of multiple low-voltage batteries, increasing vehicle costs. Utility Model Content

[0004] In view of the above problems, the present application provides a low-voltage battery power distribution architecture and a vehicle, which can solve the problem that the current vehicle power supply architecture requires regular maintenance and replacement of multiple low-voltage batteries, thereby increasing the cost of the vehicle.

[0005] A first aspect of an embodiment of the present application provides a low-voltage battery power distribution architecture, including:

[0006] A first battery pack includes at least two battery cells connected in series;

[0007] a second battery pack, comprising some of the battery cells in the first battery pack;

[0008] A first DCDC circuit, used to realize conversion between a first voltage and a second voltage;

[0009] a power distribution circuit, connected to the first battery pack, the second battery pack and the first DCDC circuit, for providing a first voltage to a first low-voltage load terminal, or providing a second voltage to a second low-voltage load terminal, for at least one of the first battery pack, the second battery pack and the first DCDC circuit;

[0010] The main control circuit is used to control the power distribution circuit and the first DCDC circuit to provide corresponding voltages for the first low-voltage load end and the second low-voltage load end.

[0011] In the technical solution of the embodiment of the present application, the first battery pack includes at least two battery cells connected in series in sequence, and the second battery pack includes some battery cells in the first battery pack, so that the first battery pack can output a first voltage, and the second battery pack can output a second voltage, and the voltage values ​​of the first voltage and the second voltage are different. The main control circuit is used to control the distribution circuit and the first DCDC circuit to provide corresponding voltages for the first low-voltage load end and the second low-voltage load end. The distribution circuit provides the first voltage for the first low-voltage load end according to the first voltage provided by the first battery pack, and the distribution circuit can also provide the second voltage for the second low-voltage load end according to the second voltage output by the second battery pack. The voltage source of the first DCDC circuit is different from that of the first battery pack and the second battery pack. The first DCDC circuit is connected to the voltage input from the outside and converted into the first voltage or the second voltage according to the voltage input from the outside, so as to provide the first voltage or the second voltage for the distribution circuit. In this way, through the control of the working state of the distribution circuit and the first DCDC circuit by the main control circuit, the first voltage can be provided for the first low-voltage load end according to any one of the first battery pack, the second battery pack and the first DCDC circuit, and the second voltage can be provided for the second low-voltage load end at the same time. Through the power supply architecture of the present application, a low-voltage battery and a first DCDC circuit can be used to provide the vehicle with multiple required low voltages, without the need for regular maintenance and replacement of multiple low-voltage batteries, which is beneficial to reducing the space occupied by the battery and the layout and simplification of the electronic control system.

[0012] In some embodiments, the low voltage battery power distribution architecture includes:

[0013] A power supply end, connected to the power distribution circuit, for receiving a third voltage and outputting the third voltage to the power distribution circuit;

[0014] The power distribution circuit is further configured to output a first voltage to the first DCDC circuit, the first battery pack or the first low-voltage load terminal according to the third voltage.

[0015] In the technical solution of the embodiment of the present application, the power supply end can be connected to a third voltage, and the third voltage can be provided by a power battery pack or a vehicle generator. The distribution circuit is controlled by the main control circuit to output a first voltage to the bidirectional DC DC circuit according to the third voltage connected to the power supply end. The bidirectional DC DC circuit can convert the first voltage into a second voltage to supply power to the second low-voltage load end. The distribution circuit can also be controlled by the main control circuit to output the first voltage to the first battery pack according to the third voltage connected to the power supply end to charge the first battery pack. The distribution circuit can also be controlled by the main control circuit to output the first voltage to the first low-voltage load end according to the third voltage connected to the power supply end to supply power to the first low-voltage load end. Through the solution in this embodiment, the power supply end can charge and balance the first battery pack, and can also provide a variety of required low voltages for the vehicle, without the need for regular maintenance and replacement of multiple low-voltage batteries, and the first voltage can be provided to the first DCDC circuit, the first battery pack or the first low-voltage load end through the distribution circuit according to the third voltage connected to the power supply end, which is conducive to reducing the occupied space of the battery and the layout and simplification of the electronic control system.

[0016] In some embodiments, the low voltage battery power distribution architecture further includes:

[0017] The second DCDC circuit is connected between the power battery pack and the power supply end, and is used for converting the voltage output by the power battery pack into the third voltage and outputting it to the power supply end.

[0018] In the technical solution of the embodiment of the present application, the second DCDC circuit converts the voltage output by the power battery pack into the third voltage and outputs it to the power supply end. When the power battery pack is powered on, the second DCDC circuit converts the voltage output by the power battery pack into the third voltage and outputs it to the distribution circuit via the power supply end. The distribution circuit is controlled by the main control circuit to output the first voltage to the bidirectional DC DC circuit according to the third voltage connected to the power supply end, and can also be controlled by the main control circuit to output the first voltage to the first battery pack to charge the first battery pack according to the third voltage connected to the power supply end, and can also be controlled by the main control circuit to output the first voltage to the first low-voltage load end according to the third voltage connected to the power supply end to supply power to the first low-voltage load end. Through the solution in this embodiment, a low-voltage battery can be used to provide a variety of required low voltages for the vehicle, without the need for regular maintenance and replacement of multiple low-voltage batteries, and the third voltage can be provided by the power battery pack, and the distribution circuit provides the first voltage to the first DCDC circuit, the first battery pack or the first low-voltage load end according to the third voltage, which is conducive to reducing the occupied space of the battery and the layout and simplification of the electronic control system.

[0019] In some embodiments, the low voltage battery power distribution architecture includes:

[0020] The third DCDC circuit is connected between the generator and the power battery pack, and is used for converting the voltage output by the generator into the third voltage and outputting it to the power supply end.

[0021] In the technical solution of the embodiment of the present application, the third DCDC circuit converts the voltage output by the generator into the third voltage and outputs it to the power supply end. When the power battery pack is powered on, the second DCDC circuit converts the voltage output by the generator into the third voltage and outputs it to the distribution circuit via the power supply end. The distribution circuit is controlled by the main control circuit to output the first voltage to the bidirectional DC DC circuit according to the third voltage connected to the power supply end, and can also be controlled by the main control circuit to output the first voltage to the first battery pack to charge the first battery pack according to the third voltage connected to the power supply end, and can also be controlled by the main control circuit to output the first voltage to the first low-voltage load end according to the third voltage connected to the power supply end to supply power to the first low-voltage load end. Through the solution in this embodiment, a low-voltage battery can be used to provide a variety of required low voltages for the vehicle, without the need for regular maintenance and replacement of multiple low-voltage batteries, and the third voltage can be provided by the generator, and the distribution circuit provides the first voltage to the first DCDC circuit, the first battery pack or the first low-voltage load end according to the third voltage, which is conducive to reducing the occupied space of the battery and the layout and simplification of the electronic control system.

[0022] In some embodiments, the power distribution circuit comprises:

[0023] The first load switch unit is connected between the first battery pack and the first low-voltage load end. The first load switch unit is controlled by the main control circuit to control the connection state between the first battery pack and the first low-voltage load end.

[0024] In some embodiments, the power distribution circuit comprises:

[0025] The first bidirectional switch unit is connected between the first battery pack and the first low-voltage load end, and the first bidirectional switch unit is controlled by the main control circuit to control the energy transfer direction between the first battery pack and the first low-voltage load end.

[0026] In the technical solution of the embodiment of the present application, the first low-voltage load end is connected to the first battery pack via the first bidirectional switch unit, one end of the first DCDC circuit can also be connected to the first battery pack via the first bidirectional switch unit, and the other end of the first DCDC circuit is connected to the second battery pack via the distribution circuit. The first DCDC circuit can convert the first voltage input at one end thereof into a second voltage to supply power to the second low-voltage load end. In this way, the first battery pack can supplement the power of the second battery pack via the first bidirectional switch unit, and the first battery pack can also supply power to the first low-voltage load end via the first bidirectional switch unit, and can also supply power to the second low-voltage load end via the first DCDC circuit. Through the solution in this embodiment, a low-voltage battery can be used to provide a variety of required low voltages for the vehicle, without the need for regular maintenance and replacement of multiple low-voltage batteries, and the first voltage can be provided to the first DCDC circuit, the first battery pack or the first low-voltage load end through the distribution circuit according to the third voltage connected to the power supply end, which is conducive to reducing the occupied space of the battery and the layout and simplification of the electric control system.

[0027] In some embodiments, the power distribution circuit comprises:

[0028] The second bidirectional switch unit is connected between the power supply end and the first low-voltage load end, and the second bidirectional switch unit is controlled by the main control circuit to control the energy transfer direction between the power supply end and the first low-voltage load end.

[0029] In the technical solution of the embodiment of the present application, the first low-voltage load terminal is connected to the first battery pack via the first bidirectional switch unit, and the first low-voltage load terminal can also be connected to the power supply terminal via the second bidirectional switch unit, and the second bidirectional switch unit is controlled by the main control circuit to control the energy transfer direction between the power supply terminal and the first low-voltage load terminal. In the case where the power battery pack is connected to the power supply terminal via the second DCDC circuit, the power supply terminal can charge the first battery pack by the second bidirectional switch unit and the first bidirectional switch unit, and the first battery pack can also be pre-charged at both ends of the power battery pack by the first bidirectional switch unit and the second bidirectional switch unit. The first DCDC circuit can convert the first voltage input at one end thereof into a second voltage to supply power to the second low-voltage load terminal. In this way, the first battery pack can supplement the power of the second battery pack via the first bidirectional switch unit, can also supply power to the first low-voltage load terminal via the first bidirectional switch unit, and can also supply power to the second low-voltage load terminal via the first DCDC circuit. Through the scheme in this embodiment, one low-voltage battery can be used to provide the vehicle with multiple required low voltages, without the need for regular maintenance and replacement of multiple low-voltage batteries, and the first voltage can be provided to the first DCDC circuit, the first battery pack or the first low-voltage load end through the distribution circuit according to the third voltage connected to the power supply end, which is beneficial to reducing the space occupied by the battery and the layout and simplification of the electronic control system.

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

[0031] The third bidirectional switch unit is connected between the first low-voltage load end and the first DCDC circuit, and the third bidirectional switch unit is controlled by the main control circuit to control the energy transfer direction between the first DCDC circuit and the first low-voltage load end.

[0032] In the technical solution of the embodiment of the present application, the first low-voltage load end is connected to the first battery pack via the first bidirectional switch unit, the first low-voltage load end can also be connected to the power supply end via the second bidirectional switch unit, and the first low-voltage load end can also be connected to the first DCDC circuit via the third bidirectional switch unit. The first bidirectional switch unit, the second bidirectional switch unit, and the third bidirectional switch unit are controlled by the main control circuit to control the energy transfer direction between the power supply end, the first DCDC circuit, and the first battery pack. In the case where the power battery pack is connected to the power supply end via the second DCDC circuit, the power supply end can charge the first battery pack by the second bidirectional switch unit and the first bidirectional switch unit, and the first battery pack can also be pre-charged by the first bidirectional switch unit and the second bidirectional switch unit. The first DCDC circuit can convert the first voltage input at one end thereof into a second voltage to supply power to the second low-voltage load end. In this way, the first battery pack can supplement the power of the second battery pack via the first bidirectional switch unit, or supply power to the first low-voltage load end via the first bidirectional switch unit, or supply power to the second low-voltage load end via the first DCDC circuit. Through the scheme in this embodiment, one low-voltage battery can be used to provide the vehicle with multiple required low voltages, without the need for regular maintenance and replacement of multiple low-voltage batteries, and the first voltage can be provided to the first DCDC circuit, the first battery pack or the first low-voltage load end through the distribution circuit according to the third voltage connected to the power supply end, which is beneficial to reducing the space occupied by the battery and the layout and simplification of the electronic control system.

[0033] In some embodiments, the power distribution circuit comprises:

[0034] The second load switch unit is connected between the first DCDC circuit and the second low-voltage load end, and the second load switch unit is controlled by the main control circuit to control the connection state between the first DCDC circuit and the second low-voltage load end.

[0035] In some embodiments, the power distribution circuit comprises:

[0036] The fourth bidirectional switch unit is connected between the first DCDC circuit and the second low-voltage load end, and the fourth bidirectional switch unit is controlled by the main control circuit to control the energy transfer direction between the first DCDC circuit and the second low-voltage load end.

[0037] In some embodiments, the power distribution circuit comprises:

[0038] A fifth bidirectional switch unit is connected between the second battery pack and the second low-voltage load end. The fifth bidirectional switch unit is controlled by the main control circuit to control the energy transfer direction between the second battery pack and the second low-voltage load end.

[0039] In some embodiments, the main control circuit is further used to control the working state of the power distribution circuit when the power of the first battery pack is less than a first preset value, so as to control the power distribution circuit to supplement power for the first battery pack according to the third voltage.

[0040] In some embodiments, the main control circuit is also used to control the working status of the power distribution circuit and the first DCDC circuit when the power level of the second battery pack is less than a second preset value, so as to control the third voltage input from the power supply end to supplement the power of the second battery pack via the power distribution circuit and the first DCDC circuit.

[0041] In some embodiments, the main control circuit is also used to control the working status of the distribution circuit and the first DCDC circuit when the power supply end is powered on, so as to control the third voltage input from the power supply end to provide the first voltage to the first low-voltage load end via the distribution circuit, and to provide the second voltage to the second low-voltage load end via the distribution circuit and the first DCDC circuit.

[0042] In some embodiments, the main control circuit is also used to control the third voltage input from the power supply end to provide the first voltage to the first low-voltage load end via the distribution circuit when a failure occurs in the first DCDC circuit, and to replenish power for the first battery pack, and to control the second battery pack to provide the second voltage to the second low-voltage load end via the distribution circuit.

[0043] A second aspect of an embodiment of the present application provides a vehicle, comprising a low-voltage battery power distribution architecture as described in any of the above embodiments.

[0044] In the technical solution of the embodiment of the present application, the first battery group includes at least two battery cells connected in series in sequence, the second battery group includes some battery cells in the first battery group, the first DCDC circuit is used to realize the conversion between the first voltage and the second voltage, and the distribution circuit can provide the first voltage to the first low-voltage load end, and can also provide the second voltage to the second low-voltage load end according to at least one of the first battery group, the second battery group, and the first DCDC circuit. The distribution circuit and the first DCDC circuit are controlled by the main control circuit so that the distribution circuit provides corresponding voltages for the first low-voltage load end and the second low-voltage load end. Through the power supply architecture of the present application, a low-voltage battery and the first DCDC circuit can be used to provide a variety of required low voltages for the vehicle, without the need for regular maintenance and replacement of multiple low-voltage batteries, which is conducive to reducing the space occupied by the battery and the layout and simplification of the electronic control system.

[0045] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0047] Figure 1 A schematic diagram of a first structure of a low-voltage battery power distribution architecture provided in an embodiment of the present application;

[0048] Figure 2 A second structural schematic diagram of a low-voltage battery power distribution architecture provided in an embodiment of the present application;

[0049] Figure 3 A third structural schematic diagram of the low-voltage battery power distribution architecture provided in an embodiment of the present application;

[0050] Figure 4 A fourth structural schematic diagram of a low-voltage battery power distribution architecture provided in an embodiment of the present application;

[0051] Figure 5 A fifth structural schematic diagram of the low-voltage battery power distribution architecture provided in an embodiment of the present application. DETAILED DESCRIPTION

[0052] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0053] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[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 "multiple" is more than two, unless otherwise clearly and specifically defined.

[0055] Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The phrase "second connection port" at various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0056] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

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

[0058] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or position relationship used for the orientation or position relationship shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific 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 respectively. This not only takes up a large space in the vehicle, but also requires regular maintenance and replacement of multiple low-voltage batteries, increasing vehicle costs.

[0060] In order to solve the above technical problems, the present application embodiment provides a low-voltage battery distribution architecture, see Figure 1 As shown, the low-voltage battery distribution architecture includes a first battery group 100, a second battery group 110, a distribution circuit 300, a first DCDC circuit 200, and a main control circuit 400. The first battery group 100 includes at least two battery cells connected in series, and the second battery group 110 includes some battery cells in the first battery group 100. The first battery group 100 is used to provide a first voltage, and the second battery group 110 is used to provide a second voltage. The main control circuit 400 is used to control the distribution circuit 300 and the first DCDC circuit 200 to provide corresponding voltages for the first low-voltage load terminal 510 and the second low-voltage load terminal 520. The distribution circuit 300 is connected to the first battery group 100 and the second battery group 110. The distribution circuit 300 can provide a first voltage for the first low-voltage load terminal 510 according to at least one of the first battery group 100, the second battery group 110 and the first DCDC circuit 200, and can also provide a second voltage for the second low-voltage load terminal 520. At this time, the first DCDC circuit 200 is connected between the first battery group 100 and the distribution circuit 300, and the first voltage provided by the first battery group 100 is converted into a second voltage through the first DCDC circuit 200 and output to the second low-voltage load terminal 520.

[0061] In this embodiment, the first battery group 100 includes at least two battery cells connected in series, and the second battery group 110 includes some battery cells in the first battery group 100, so that the first battery group 100 can output a first voltage and the second battery group 110 can output a second voltage, and the voltage values ​​of the first voltage and the second voltage are different. The main control circuit 400 is used to control the distribution circuit 300 and the first DCDC circuit 200 to provide corresponding voltages for the first low-voltage load terminal 510 and the second low-voltage load terminal 520. The distribution circuit 300 provides a first voltage to the first low-voltage load terminal 510 according to the first voltage provided by the first battery group 100, and the distribution circuit 300 can also provide a second voltage to the second low-voltage load terminal 520 according to the second voltage output by the second battery group 110. The voltage source of the first DCDC circuit 200 is different from the first battery pack 100 and the second battery pack 110. The first DCDC circuit 200 can be connected to an external input voltage and converted into a first voltage or a second voltage according to the external input voltage, thereby providing the first voltage or the second voltage for the distribution circuit 300. In this way, through the control of the working state of the distribution circuit 300 and the first DCDC circuit 200 by the main control circuit 400, the first voltage can be provided to the first low-voltage load terminal 510 according to any one of the first battery pack 100, the second battery pack 110 and the first DCDC circuit 200, and the second voltage can be provided to the second low-voltage load terminal 520 at the same time. Through the power supply architecture of the present application, a low-voltage battery can be used to provide a variety of required low voltages for the vehicle, without the need for regular maintenance and replacement of multiple low-voltage batteries, which is conducive to reducing the occupied space of the battery and the layout and simplification of the electric control system.

[0062] In some embodiments, the first DCDC circuit 200 can be a bidirectional DCDC circuit. The first DCDC circuit 200 is controlled by the main control circuit 400. Under the control of the main control circuit 400, the first voltage input to its first end can be converted into a second voltage, and the second voltage input to its second end can be converted into the first voltage.

[0063] In some embodiments, the first DCDC circuit 200 can be connected between the first battery group 100 and the distribution circuit 300. The first end of the first DCDC circuit 200 is connected to the first battery group 100 via the distribution circuit 300, and the second end of the first DCDC circuit 200 is connected to the second battery group 110 via the distribution circuit. At this time, the first DCDC circuit 200 can convert the first voltage provided by the first battery group 100 into a second voltage and output it to the distribution circuit 300, so that the main control circuit 400 controls the working status of the distribution circuit 300 and the first DCDC circuit 200, so that the first DCDC circuit 200 converts the first voltage input to its first end into a second voltage, and the first voltage provided by the first battery group 100 provides a second voltage to the second low-voltage load end 520 via the first DCDC circuit 200.

[0064] In some embodiments, the first battery pack 100 and the second battery pack 110 share the same negative electrode as a reference ground.

[0065] In some embodiments, the first DCDC circuit 200 can convert the second voltage provided by the second battery group 110 into a first voltage, the distribution circuit 300 provides a first voltage to the first low-voltage load terminal 510 according to the second voltage provided by the second battery group 110, and the distribution circuit 300 provides a second voltage to the second low-voltage load terminal 520 according to the second voltage provided by the second battery group 110. The main control circuit 400 is used to control the distribution circuit 300 and the first DCDC circuit 200 to provide corresponding voltages to the first low-voltage load terminal 510 and the second low-voltage load terminal 520.

[0066] In this embodiment, the first battery pack 100 includes at least two battery cells connected in series, the second battery pack 110 includes some battery cells in the first battery pack 100, and the first DCDC circuit 200 is connected between the first battery pack 100 and the distribution circuit 300. When the first DCDC circuit 200 can convert the second voltage provided by the second battery pack 110 into the first voltage, the working state of the distribution circuit 300 is controlled by the main control circuit 400, and the second battery pack 110 provides the first voltage to the first low-voltage load terminal 510 via the first DCDC circuit 200 and the distribution circuit 300, and the distribution circuit 300 provides the second voltage to the second low-voltage load terminal 520 according to the second voltage provided by the second battery pack 110. Through the power supply architecture of the present application, one low-voltage battery can be used to provide a variety of required low voltages for the vehicle, without the need for regular maintenance and replacement of multiple low-voltage batteries, which is conducive to reducing the space occupied by the battery and the layout and simplification of the electronic control system.

[0067] In some embodiments, the power distribution circuit 300 provides a first voltage to the first low-voltage load terminal 510 according to a first voltage provided by the first battery pack 100 and a second voltage provided by the second battery pack 110 .

[0068] In this embodiment, the first battery group 100 includes at least two battery cells connected in series, the second battery group 110 includes some battery cells in the first battery group 100, and the distribution circuit 300 outputs the first voltage provided by the first battery group 100 to the first low-voltage load terminal 510. The first DCDC circuit 200 can convert the second voltage provided by the second battery group 110 into a first voltage. At this time, the second battery group 110 can provide the first voltage to the first low-voltage load terminal 510 via the first DCDC circuit 200 and the distribution circuit 300. In this way, when the first low-voltage load terminal 510 has a large power demand, the first battery group 100 and the second battery group 110 can provide it with the first voltage at the same time.

[0069] In some embodiments, the power distribution circuit 300 may also provide a second voltage to the second low-voltage load terminal 520 according to the first voltage provided by the first battery pack 100 and the second voltage provided by the second battery pack 110 .

[0070] In this embodiment, the first DCDC circuit 200 is connected between the first battery group 100 and the distribution circuit 300. The first DCDC circuit 200 can convert the first voltage provided by the first battery group 100 into a second voltage. The main control circuit 400 controls the voltage conversion direction of the first DCDC circuit 200. The first DCDC circuit 200 can convert the first voltage provided by the first battery group 100 into a second voltage, and the distribution circuit 300 distributes the second voltage output by the first DCDC circuit 200 to the second low-voltage load end 520. The second voltage output by the second battery group 110 is directly output to the second low-voltage load end 520 via the distribution circuit 300. In this way, when the second low-voltage load end 520 has a large power demand, the first battery group 100 and the second battery group 110 can provide it with a second voltage at the same time.

[0071] In some embodiments, see Figure 2 As shown, the low-voltage battery power distribution architecture includes a power supply terminal 530, which is connected to the power distribution circuit 300. The power supply terminal 530 is used to access the third voltage and output the third voltage to the power distribution circuit 300. The power distribution circuit 300 is controlled by the main control circuit 400 to output the first voltage to the first DCDC circuit 200, the first battery pack 100 or the first low-voltage load terminal 510 according to the third voltage accessed by the power supply terminal 530.

[0072] In the embodiment of the present application, the power supply terminal 530 can be connected to a third voltage inputted externally, and the third voltage inputted externally can be provided by a power battery pack or a vehicle generator. When the power supply terminal 530 is connected to the third voltage inputted externally, the voltage source of the first DCDC circuit 200 is different from the first battery pack 100 and the second battery pack 110, and the voltage source input voltage of the first DCDC circuit 200 comes from the third voltage inputted to the power supply terminal 530. The distribution circuit 300 is controlled by the main control circuit 400 to output the first voltage to the first DCDC circuit 200 according to the third voltage inputted to the power supply terminal 530. The first DCDC circuit 200 converts the inputted first voltage into a second voltage and outputs it to the distribution circuit 300, and the distribution circuit 300 outputs it to the second low-voltage load terminal 520. The distribution circuit 300 can also be controlled by the main control circuit 400 to output the first voltage to the first low-voltage load terminal 510 according to the third voltage inputted to the power supply terminal 530, so as to supply power to the first low-voltage load terminal 510. Through the solution in this embodiment, one low-voltage battery can be used to provide the vehicle with multiple required low voltages, without the need for regular maintenance and replacement of multiple low-voltage batteries, and the third voltage input from the outside can be connected through the power supply terminal 530 to power the first DCDC circuit 200, the first battery pack 100 or the first low-voltage load terminal 510, which is beneficial to reducing the space occupied by the battery and the layout and simplification of the electronic control system.

[0073] In some embodiments, the power distribution circuit 300 may also be controlled by the main control circuit 400 to output the first voltage to the first battery pack 100 according to the third voltage connected to the power supply terminal 530 to charge the first battery pack 100.

[0074] In some embodiments, see Figure 3 As shown, the low-voltage battery power distribution architecture also includes a second DCDC circuit 611, which is connected between the power supply end 530 and the power battery pack 610, and is used to convert the voltage output by the power battery pack 610 into a third voltage and output it to the power supply end 530.

[0075] In this embodiment, the second DCDC circuit 611 converts the voltage output by the power battery pack 610 into a first voltage and outputs it to the power supply terminal 530. When the power battery pack 610 is powered on, the second DCDC circuit 611 converts the voltage output by the power battery pack into a third voltage and outputs it to the power distribution circuit 300 via the power supply terminal 530. The power distribution circuit 300 is controlled by the main control circuit 400 to output the third voltage connected to the power supply terminal 530 to the bidirectional DC DC circuit, and can also be controlled by the main control circuit 400 to output the third voltage connected to the power supply terminal 530 to the first battery pack 100 to charge the first battery pack 100, and can also be controlled by the main control circuit 400 to output the third voltage connected to the power supply terminal 530 to the first low-voltage load terminal 510 to supply power to the first low-voltage load terminal 510. Through the solution in this embodiment, one low-voltage battery can be used to provide the vehicle with multiple required low voltages, without the need for regular maintenance and replacement of multiple low-voltage batteries, and the distribution circuit 300 can access the external input third voltage through the power supply terminal 530 to power the first DCDC circuit 200, the first battery pack 100 or the first low-voltage load terminal 510, which is beneficial to reducing the space occupied by the battery and the layout and simplification of the electronic control system.

[0076] In some embodiments, see Figure 4 As shown, the low-voltage battery power distribution architecture includes a third DCDC circuit 621 , which is connected between the generator 620 and the power supply end 530 , and is used to convert the voltage output by the generator 620 into a third voltage and output it to the power supply end 530 .

[0077] In this embodiment, the third DCDC circuit 621 converts the voltage output by the generator into a third voltage and outputs it to the power supply terminal 530, and the second DCDC circuit 611 converts the voltage output by the generator into a third voltage and outputs it to the power distribution circuit 300 via the power supply terminal 530. The power distribution circuit 300 is controlled by the main control circuit 400 to output the first voltage to the bidirectional DC DC circuit according to the third voltage connected to the power supply terminal 530, and can also be controlled by the main control circuit 400 to output the first voltage to the first battery pack 100 according to the third voltage connected to the power supply terminal 530 to charge the first battery pack 100, and can also be controlled by the main control circuit 400 to output the first voltage to the first low-voltage load terminal 510 according to the third voltage connected to the power supply terminal 530 to supply power to the first low-voltage load terminal 510. Through the scheme in this embodiment, one low-voltage battery can be used to provide the vehicle with multiple required low voltages, without the need for regular maintenance and replacement of multiple low-voltage batteries, and the first voltage input from the outside can be connected through the power supply terminal 530 to power the first DCDC circuit 200, the first battery pack 100 or the first low-voltage load terminal 510, which is beneficial to reducing the space occupied by the battery and the layout and simplification of the electronic control system.

[0078] In some embodiments, the third voltage may have the same voltage value as the first voltage.

[0079] In some embodiments, a voltage value of the third voltage may be greater than a voltage value of the first voltage, and a voltage difference between the third voltage and the first voltage is less than 3V.

[0080] In some embodiments, the second DCDC circuit 611 and the third DCDC circuit 621 can be connected to the power supply terminal 530 at the same time, and the generator 620 inside the vehicle can charge the power battery pack 610 via the power supply terminal 530 .

[0081] In some embodiments, the second DCDC circuit 611 and the third DCDC circuit 621 may be the same transformer, the first winding of the transformer is connected to the power battery pack 610 , the second winding of the transformer is connected to the generator 620 , and the third winding of the transformer is connected to the power supply terminal 530 .

[0082] In some embodiments, the second DCDC circuit 611 and the third DCDC circuit 621 can be the same voltage conversion circuit, the first end of the voltage conversion circuit is connected to the power battery pack 610 and the generator 620, and the second end of the voltage conversion circuit is connected to the power supply end 530. The voltage conversion circuit can convert the input voltage of its first end into a third voltage and output it to the power supply end 530.

[0083] In some embodiments, the voltage conversion circuit converts the third voltage input at its second terminal into high voltage electricity and outputs it to both ends of the power battery pack 610 to pre-charge the capacitors at both ends of the power battery pack 610 .

[0084] In some embodiments, see Figure 5 As shown, the power distribution circuit 300 includes a first load switch unit T1, which is connected between the first battery pack 100 and the first low-voltage load terminal 510. The first load switch unit T1 is controlled by the main control circuit 400 to control the connection state between the first battery pack 100 and the first low-voltage load terminal 510.

[0085] In some embodiments, see Figure 5 As shown, the power distribution circuit 300 includes a first bidirectional switch unit 310, which is connected between the first battery group 100 and the first low-voltage load end 510, and the first bidirectional switch unit 310 is controlled by the main control circuit 400 to control the direction of energy transfer between the first battery group 100 and the first low-voltage load end 510.

[0086] In an embodiment of the present application, the first low-voltage load terminal 510 is connected to the first battery group 100 via the first bidirectional switch unit 310, one end of the first DCDC circuit 200 can also be connected to the first battery group 100 via the first bidirectional switch unit 310, and the other end of the first DCDC circuit 200 is connected to the second battery group 110 via the distribution circuit 300. The first DCDC circuit 200 can convert the first voltage input at one end thereof into a second voltage to supply power to the second low-voltage load terminal 520. In this way, the first battery group 100 can supplement power to the second battery group 110 via the first bidirectional switch unit 310, or supply power to the first low-voltage load terminal 510 via the first bidirectional switch unit 310, or supply power to the second low-voltage load terminal 520 via the first DCDC circuit 200. Through the scheme in this embodiment, one low-voltage battery can be used to provide the vehicle with multiple required low voltages, without the need for regular maintenance and replacement of multiple low-voltage batteries, and the first voltage input from the outside can be connected through the power supply terminal 530 to power the first DCDC circuit 200, the first battery pack 100 or the first low-voltage load terminal 510, which is beneficial to reducing the space occupied by the battery and the layout and simplification of the electronic control system.

[0087] In some embodiments, see Figure 5 As shown, the first load switch unit T1 is connected between the first low-voltage load terminal 510 and the first bidirectional switch unit 310, the first bidirectional switch unit 310 is connected to the first terminal of the first load switch unit T1, and the first low-voltage load terminal 510 is connected to the second terminal of the first load switch unit T1.

[0088] In some embodiments, see Figure 5 As shown, the power distribution circuit 300 includes a second bidirectional switch unit 320, which is connected between the first low-voltage load terminal 510 and the power supply terminal 530. The second bidirectional switch unit 320 is controlled by the main control circuit 400 to control the direction of energy transfer between the first low-voltage load terminal 510 and the power supply terminal 530.

[0089] In the embodiment of the present application, the first low-voltage load terminal 510 is connected to the first battery pack 100 via the first bidirectional switch unit 310, and the first low-voltage load terminal 510 can also be connected to the power supply terminal 530 via the second bidirectional switch unit 320, and the second bidirectional switch unit 320 is controlled by the main control circuit 400 to control the energy transfer direction between the first bidirectional switch unit 310 and the power supply terminal 530. In the case where the power battery pack is connected to the power supply terminal 530 via the second DCDC circuit 611, the power supply terminal 530 can charge the first battery pack 100 through the second bidirectional switch unit 320 and the first bidirectional switch unit 310, and the first battery pack 100 can also pre-charge the power battery pack through the first bidirectional switch unit 310 and the second bidirectional switch unit 320. The first DCDC circuit 200 can convert the first voltage input at one end thereof into a second voltage to supply power to the second low-voltage load end 520. In this way, the first battery pack 100 can supplement power to the second battery pack 110 via the first bidirectional switch unit 310, or supply power to the first low-voltage load end 510 via the first bidirectional switch unit 310, or supply power to the second low-voltage load end 520 via the first DCDC circuit 200. Through the scheme in this embodiment, a single low-voltage battery can be used to provide a variety of required low voltages for the vehicle, without the need for regular maintenance and replacement of multiple low-voltage batteries, and the first voltage inputted externally can be connected through the power supply end 530 to supply power to the first DCDC circuit 200, the first battery pack 100 or the first low-voltage load end 510, which is conducive to reducing the occupied space of the battery and the layout and simplification of the electric control system.

[0090] In some embodiments, see Figure 5 As shown, the first load switch unit T1 is connected between the first low voltage load terminal 510 and the second bidirectional switch unit 320, the second bidirectional switch unit 320 is connected to the first terminal of the first load switch unit T1, and the first low voltage load terminal 510 is connected to the second terminal of the first load switch unit T1.

[0091] In some embodiments, see Figure 5 As shown, the power distribution circuit 300 includes a third bidirectional switch unit 330, which is connected between the first low-voltage load terminal 510 and the first DCDC circuit 200, and the third bidirectional switch unit 330 is controlled by the main control circuit 400 to control the energy transfer direction between the first low-voltage load terminal 510 and the first DCDC circuit 200.

[0092] In the embodiment of the present application, the first low-voltage load terminal 510 is connected to the first battery pack 100 via the first bidirectional switch unit 310, and the first low-voltage load terminal 510 can also be connected to the power supply terminal 530 via the second bidirectional switch unit 320, and the first low-voltage load terminal 510 can also be connected to the first DCDC circuit 200 via the third bidirectional switch unit 330. The first bidirectional switch unit 310, the second bidirectional switch unit 320, and the third bidirectional switch unit 330 are controlled by the main control circuit 400 to control the energy transfer direction between the power supply terminal 530, the first DCDC circuit 200, and the first battery pack 100. When the power battery pack is connected to the power supply terminal 530 via the second DCDC circuit 611, the power supply terminal 530 can charge the first battery pack 100 by the second bidirectional switch unit 320 and the first bidirectional switch unit 310, and the first battery pack 100 can also pre-charge the power battery pack by the first bidirectional switch unit 310 and the second bidirectional switch unit 320. The first DCDC circuit 200 can convert the first voltage input at one end thereof into a second voltage to supply power to the second low-voltage load end 520. In this way, the first battery pack 100 can supplement power to the second battery pack 110 via the first bidirectional switch unit 310, or supply power to the first low-voltage load end 510 via the first bidirectional switch unit 310, or supply power to the second low-voltage load end 520 via the first DCDC circuit 200. Through the scheme in this embodiment, a single low-voltage battery can be used to provide a variety of required low voltages for the vehicle, without the need for regular maintenance and replacement of multiple low-voltage batteries, and the first voltage inputted externally can be connected through the power supply end 530 to supply power to the first DCDC circuit 200, the first battery pack 100 or the first low-voltage load end 510, which is conducive to reducing the occupied space of the battery and the layout and simplification of the electric control system.

[0093] In some embodiments, see Figure 5 As shown, the first load switch unit T1 is connected between the first low-voltage load terminal 510 and the third bidirectional switch unit 330, the third bidirectional switch unit 330 is connected to the first end of the first load switch unit T1, and the first low-voltage load terminal 510 is connected to the second end of the first load switch unit T1.

[0094] In some embodiments, see Figure 5As shown, one end of the first bidirectional switch unit 310, the second bidirectional switch unit 320, and the third bidirectional switch unit 330 are connected to the first end of the first load switch unit T1, the other end of the first bidirectional switch unit 310 is connected to the first battery pack 100, the other end of the second bidirectional switch unit 320 is connected to the power supply end 530, and the other end of the third bidirectional switch unit 330 is connected to the first DCDC circuit 200. The first bidirectional switch unit 310, the second bidirectional switch unit 320, and the third bidirectional switch unit 330 are controlled by the main control circuit 400. The main control circuit 400 can control the current direction between the power supply terminal 530, the first battery pack 100, and the first DCDC circuit 200 by controlling the current direction of the first bidirectional switch unit 310, the second bidirectional switch unit 320, and the third bidirectional switch unit 330 in the on state. It can make any one of the power supply terminal 530, the first battery pack 100, and the first DCDC circuit 200 as input, and the other two or the first low-voltage load terminal 510 as output. It can also make any two of the power supply terminal 530, the first battery pack 100, and the first DCDC circuit 200 as input, and the other two or the first low-voltage load terminal 510 as output. It can also make the power supply terminal 530, the first battery pack 100, and the first DCDC circuit 200 all serve as input to supply power to the first low-voltage load terminal 510, thereby improving the power supply safety of the first low-voltage load terminal 510.

[0095] In some embodiments, see Figure 5 As shown, the power distribution circuit 300 includes a second load switch unit T2, which is connected between the first DCDC circuit 200 and the second low-voltage load end 520, and the second load switch unit T2 is controlled by the main control circuit 400 to control the connection state between the first DCDC circuit 200 and the second low-voltage load end 520.

[0096] In this embodiment, the second low-voltage load end 520 is connected to the first DCDC circuit 200 via the second load switch unit T2, and can receive the second voltage converted by the first DCDC circuit 200. The second load switch unit T2 can be controlled by the main control circuit 400, thereby controlling the voltage output of the second low-voltage load end 520.

[0097] In some embodiments, see Figure 5 As shown, the power distribution circuit 300 includes a fourth bidirectional switch unit 340, which is connected between the first DCDC circuit 200 and the second low-voltage load end 520. The fourth bidirectional switch unit 340 is controlled by the main control circuit 400 to control the energy transfer direction between the first DCDC circuit 200 and the second low-voltage load end 520.

[0098] In this embodiment, the second low-voltage load terminal 520 is connected to the first DCDC circuit 200 via the fourth bidirectional switch unit 340. The first DCDC circuit 200 can be controlled by the fourth bidirectional switch unit 340 to convert the first voltage inputted at the first terminal thereof into the second voltage outputted to the second load switch unit T2. The first DCDC circuit 200 can also be controlled to convert the second voltage inputted at the second terminal thereof into the first voltage and outputted to the first load switch unit T1 via the third bidirectional switch unit 330. In this way, the first bidirectional switch unit 310 can be turned off when some battery cells in the first battery pack 100 are abnormal, and the second battery pack 110 provides the first voltage to the first low-voltage load terminal 510 via the first DCDC circuit 200. At the same time, the second battery pack 110 also provides the second voltage to the second low-voltage load terminal 520, thereby improving the safety level of low-voltage power distribution of the vehicle.

[0099] In some embodiments, see Figure 5 As shown, the power distribution circuit 300 includes a fifth bidirectional switch unit 350, which is connected between the second battery group 110 and the second low-voltage load end 520. The fifth bidirectional switch unit 350 is controlled by the main control circuit 400 to control the direction of energy transfer between the second battery group 110 and the second low-voltage load end 520.

[0100] In this embodiment, the second battery pack 110 is connected to the first DCDC circuit 200 via the fifth bidirectional switch unit 350. When the first battery pack 100 and the second battery pack 110 are working normally, the third bidirectional switch unit 330 is disconnected, and the first battery pack 100 outputs the first voltage to the first low-voltage load terminal 510 via the first bidirectional switch unit 310, and the second battery pack 110 outputs the second voltage to the second low-voltage load terminal 520 via the fifth bidirectional switch unit 350. Through the power supply architecture of the present application, the first battery pack 100 can be used to provide a variety of required low voltages for the vehicle, without the need for regular maintenance and replacement of multiple low-voltage batteries, which is conducive to reducing the occupied space of the battery and the layout and simplification of the electric control system.

[0101] In some embodiments, see Figure 5As shown, one end of the fourth bidirectional switch unit 340 and the fifth bidirectional switch unit 350 are connected to the first end of the first load switch unit T1, the other end of the fourth bidirectional switch unit 340 is connected to the first DCDC circuit 200, and the other end of the fifth bidirectional switch unit 350 is connected to the second battery pack 110. The fourth bidirectional switch unit 340 and the fifth bidirectional switch unit 350 are controlled by the main control circuit 400. The main control circuit 400 can control the current direction between the second battery pack 110 and the first DCDC circuit 200 by controlling the current direction of the fourth bidirectional switch unit 340 and the fifth bidirectional switch unit 350 in the on state, so as to make any one of the second battery pack 110 and the first DCDC circuit 200 as input, and the other one or the second low-voltage load end 520 as output, or make the second battery pack 110 and the first DCDC circuit 200 both as input to supply power to the second low-voltage load end 520, thereby improving the power supply safety of the second low-voltage load end 520.

[0102] In some embodiments, see Figure 5 As shown, the first bidirectional switch unit 310 may include two MOSFETs facing each other. By controlling the switching states of the two MOSFETs facing each other in the first bidirectional switch unit 310, the energy transmission direction between the first DCDC circuit 200 and the first battery pack 100 may be controlled.

[0103] In some embodiments, see Figure 5 As shown, the first bidirectional switch 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 opposite to each other.

[0104] In some embodiments, the first electronic switch Q1 and the second electronic switch Q2 are both MOSFETs, and the sources of the first electronic switch Q1 and the second electronic switch Q2 are connected in common, or the drains thereof are connected in common.

[0105] In some embodiments, see Figure 5 As shown, the second bidirectional switch unit 320 may include two opposite MOSFETs. By controlling the switching states of the two opposite MOSFETs in the second bidirectional switch unit 320, the energy transmission direction between the first DCDC circuit 200 and the power supply end 530 can be controlled, and the energy transmission direction between the first battery pack 100 and the power supply end 530 can also be controlled.

[0106] In some embodiments, see Figure 5 As shown, the second bidirectional switch unit 320 includes 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 opposite to each other.

[0107] In some embodiments, see Figure 5As shown, the third bidirectional switch unit 330 may include two opposite MOSFETs. By controlling the switching states of the two opposite MOSFETs in the third bidirectional switch unit 330, the energy transmission direction between the first DCDC circuit 200 and the power supply end 530 can be controlled, and the energy transmission direction between the first DCDC circuit 200 and the first battery pack 100 can also be controlled.

[0108] In some embodiments, the third electronic switch Q3 and the fourth electronic switch Q4 are both MOSFETs, and the sources of the third electronic switch Q3 and the fourth electronic switch Q4 are connected in common, or the drains thereof are connected in common.

[0109] In some embodiments, see Figure 5 As shown, the third bidirectional switch unit 330 includes a fifth electronic switch Q5 and a sixth electronic switch Q6, and the fifth electronic switch Q5 and the sixth electronic switch Q6 are arranged opposite to each other.

[0110] In some embodiments, see Figure 5 As shown, the fourth bidirectional switch unit 340 may include two opposite MOSFETs. By controlling the switching states of the two opposite MOSFETs in the fourth bidirectional switch unit 340, the energy transmission direction between the first DCDC circuit 200 and the second low-voltage load end 520 can be controlled, and the energy transmission direction between the first DCDC circuit 200 and the second battery pack 110 can also be controlled.

[0111] In some embodiments, the fifth electronic switch Q5 and the sixth electronic switch Q6 are both MOSFETs, and the sources of the fifth electronic switch Q5 and the sixth electronic switch Q6 are connected in common, or the drains thereof are connected in common.

[0112] In some embodiments, see Figure 5 As shown, the quad bidirectional switch unit 340 includes a seventh electronic switch Q7 and an eighth electronic switch Q8, and the seventh electronic switch Q7 and the eighth electronic switch Q8 are arranged opposite to each other.

[0113] In some embodiments, see Figure 5 As shown, the fifth bidirectional switch unit 350 may include two opposite MOSFETs. By controlling the switching states of the two opposite MOSFETs in the fifth bidirectional switch unit 350, the energy transmission direction between the second battery group 110 and the second low-voltage load end 520 can be controlled, and the energy transmission direction between the first DCDC circuit 200 and the second battery group 110 can also be controlled.

[0114] In some embodiments, the seventh electronic switch Q7 and the eighth electronic switch Q8 are both MOSFETs, and the sources of the seventh electronic switch Q7 and the eighth electronic switch Q8 are connected in common, or the drains thereof are connected in common.

[0115] In some embodiments, see Figure 5 As shown, the fifth bidirectional switch unit 350 includes a ninth electronic switch Q9 and a tenth electronic switch Q10, and the ninth electronic switch Q9 and the tenth electronic switch Q10 are arranged opposite to each other.

[0116] In some embodiments, the ninth electronic switch Q9 and the tenth electronic switch Q10 are both MOSFETs, and the sources of the ninth electronic switch Q9 and the tenth electronic switch Q10 are connected in common, or the drains thereof are connected in common.

[0117] In some embodiments, the first low-voltage load terminal 510 can be connected to the vehicle's internal comfort type loads, such as vehicle air conditioning, seat heating and other functional loads, and the second low-voltage load terminal 520 can be connected to the vehicle's internal safety control type power loads, such as vehicle computer controllers, lights, steering, brakes and other functional loads.

[0118] In some embodiments, the first load switch unit T1 may include a multi-way electronic switch, and the multi-way electronic switch is respectively connected to a plurality of first loads.

[0119] In some embodiments, the second load switch unit T2 may include a multi-way electronic switch, and the multi-way electronic switch is respectively connected to a plurality of second loads.

[0120] In this embodiment, the first load may be a functional load such as a vehicle air conditioner, seat heating, etc., and the second load may be a functional load such as a vehicle controller, lighting, steering, braking, etc.

[0121] In some embodiments, the main control circuit 400 is also used to control the working state of the distribution circuit 300 when the power of the first battery pack 100 is less than a first preset value, so as to control the third voltage input from the power supply end 530 to supplement the power of the first battery pack 100 through the distribution circuit 300.

[0122] In this embodiment, when the power level of the first battery pack 100 is less than the first preset value, the states of the first double-open switch unit and the second bidirectional switch unit 320 are controlled so that the current flows from the power supply end 530 to the first double-open switch unit, and the first battery pack 100 is charged via the first bidirectional switch unit 310.

[0123] In some embodiments, the main control circuit 400 is also used to control the working status of the distribution circuit 300 and the first DCDC circuit 200 when the power level of the second battery group 110 is less than a second preset value, so as to control the third voltage input from the power supply end 530 to replenish power for the second battery group 110 via the distribution circuit 300 and the first DCDC circuit 200.

[0124] In this embodiment, when the power level of the second battery group 110 is less than the second preset value, the states of the first double-on switch unit, the third bidirectional switch unit 330, the fourth bidirectional switch unit 340 and the fifth bidirectional switch unit 350 are controlled so that the current flows from the power supply end 530 to the first double-on switch unit and the third bidirectional switch unit 330, and the first voltage is converted into a second voltage via the first DCDC circuit 200 and then output to the fourth bidirectional switch unit 340, and then the second battery group 110 is charged via the fifth bidirectional switch unit 350, so that the power levels of the battery cells in the second battery group 110 match those of other battery cells in the first battery group 100.

[0125] In some embodiments, the main control circuit 400 is also used to control the working status of the distribution circuit 300 and the first DCDC circuit 200 when the power supply end 530 is powered on, so as to control the third voltage input from the power supply end 530 to provide a first voltage to the first low-voltage load end 510 via the distribution circuit 300, and to provide a second voltage to the second low-voltage load end 520 via the distribution circuit 300 and the first DCDC circuit 200.

[0126] In this embodiment, when the power supply end 530 is powered on, the first bidirectional switch unit 310 and the fifth bidirectional switch unit 350 can be turned off, the second bidirectional switch unit 320, the third bidirectional switch unit 330 and the fourth bidirectional switch unit 340 can be turned on, and the first DCDC circuit 200 can be controlled to start, and the first voltage input to its first end is converted into a second voltage, so that the power supply end 530 provides the first voltage to the first low-voltage load end 510 via the distribution circuit 300, and provides the second voltage to the second low-voltage load end 520 via the first DCDC circuit 200.

[0127] In some embodiments, the main control circuit 400 is also used to control the third voltage input from the power supply terminal 530 to provide a first voltage to the first low-voltage load terminal 510 via the distribution circuit 300 when a fault occurs in the first DCDC circuit 200, and to control the second battery group 110 to provide a second voltage to the second low-voltage load terminal 520 via the distribution circuit 300.

[0128] In this embodiment, if the first DCDC circuit 200 fails, the third bidirectional switch unit 330 and the fourth bidirectional switch unit 340 are controlled to be turned off, and the third voltage input from the power supply end 530 provides a first voltage to the first low-voltage load end 510 via the second bidirectional switch unit 320 and the first load switch unit T1, and the second battery pack 110 provides a second voltage to the second low-voltage load end 520 via the fifth bidirectional switch unit 350 and the second load switch unit T2, and the distribution circuit 300 outputs a first voltage to replenish the first battery pack 100 according to the third voltage input from the power supply end 530, thereby preventing the second battery pack 110 inside it from being over-discharged, thereby improving the safety of the vehicle's low-voltage power distribution.

[0129] When the vehicle is started, the first bidirectional switch unit 310 is turned on, and the first battery pack 100 outputs the first voltage through the first bidirectional switch unit 310 to power the first low-voltage load terminal 510, thereby powering the controller of the driving safety category inside the vehicle. At the same time, the second battery pack 110 powers the second low-voltage load terminal 520 through the fifth bidirectional switch unit 350, and the vehicle is powered on. Then, the power supply terminal 530 receives the first voltage provided by the power battery pack or the generator, and the power supply terminal 530 powers the first low-voltage load terminal 510 through the second bidirectional switch unit 320, and powers the second low-voltage load terminal 520 through the third bidirectional switch unit 330, the first DCDC circuit 200, and the fourth bidirectional switch unit 340, and finally the fifth bidirectional switch unit 350 and the first bidirectional switch unit 310 are turned off.

[0130] In some embodiments, when the vehicle is driving normally, when a high-voltage circuit (such as a relay, a high-voltage connector, a non-start-stop battery cell, etc.) fails, the first DCDC circuit 200 is started, and the first battery pack 100 outputs a first voltage to the first low-voltage load terminal 510, and the second battery pack 110 outputs a second voltage to the second low-voltage load terminal 520 via the fifth bidirectional switch unit 350, so that the vehicle's safety load is quickly connected to the low-voltage battery, ensuring the user's basic steering and side parking safety operations.

[0131] In some embodiments, the output voltage range of the second battery pack 110 is 12V-72V.

[0132] In some embodiments, the second battery pack 110 includes a 12 volt lithium-ion battery or a sodium-ion battery, or other rechargeable batteries.

[0133] In some embodiments, the second battery pack 110 includes a 24V lithium-ion battery or a sodium-ion battery, or other rechargeable batteries.

[0134] In some embodiments, the second battery pack 110 includes a 48V lithium-ion battery or a sodium-ion battery, or other rechargeable batteries.

[0135] In some embodiments, the second battery pack 110 includes a 72V lithium-ion battery or a sodium-ion battery, or other rechargeable batteries.

[0136] In this embodiment, the low-voltage battery distribution architecture in the embodiment of the present application can be applied to new energy vehicles as well as fuel vehicles, wherein the output voltage of the second battery pack 110 in the first battery pack 100 does not exceed 72V.

[0137] In some embodiments, the first battery pack 100 includes a 48V lithium-ion battery or a sodium-ion battery, or other rechargeable batteries, and the output voltage of the first battery pack 100 is 48V.

[0138] In some embodiments, the first battery pack 100 includes a 72V lithium-ion battery or a sodium-ion battery, or other rechargeable batteries, and the output voltage of the first battery pack 100 does not exceed 72V.

[0139] An embodiment of the present application also provides a vehicle management system, which includes a low-voltage battery distribution architecture as in any one of the above embodiments.

[0140] An embodiment of the present application also provides a car, which includes a low-voltage battery distribution architecture as described in any one of the above embodiments.

[0141] In this embodiment, by integrating the low-voltage battery distribution architecture of any of the above embodiments in the automobile, the first DCDC circuit 200, the distribution circuit 300, and the main control circuit 400 can be integrated into one structural component, and the first DCDC circuit 200 and the distribution circuit 300 reuse the same controller, thereby optimizing the electrical architecture of the vehicle management system, simplifying the relevant components of the entire vehicle, and greatly reducing the cost of the entire vehicle.

[0142] In this embodiment, a first battery pack 100 and a first DCDC circuit 200 are provided in a low-voltage power distribution system in a car. The first battery pack 100 includes at least two battery cells connected in series in sequence, and the second battery pack 110 includes some battery cells in the first battery pack 100, so that the first battery pack 100 can output a first voltage and the second battery pack 110 can output a second voltage. The voltage values ​​of the first voltage and the second voltage are different. The main control circuit 400 is used to control the distribution circuit 300 and the first DCDC circuit 200 to provide corresponding voltages for the first low-voltage load terminal 510 and the second low-voltage load terminal 520. The distribution circuit 300 provides a first voltage to the first low-voltage load terminal 510 according to the first voltage provided by the first battery pack 100, and the distribution circuit 300 can also provide a second voltage to the second low-voltage load terminal 520 according to the second voltage output by the second battery pack 110. The voltage source of the first DCDC circuit 200 is different from the first battery pack 100 and the second battery pack 110. The first DCDC circuit 200 can be connected to an external input voltage and converted into a first voltage or a second voltage according to the external input voltage, thereby providing a first voltage or a third voltage for the distribution circuit 300. In this way, through the control of the working state of the distribution circuit 300 and the first DCDC circuit 200 by the main control circuit 400, the first voltage can be provided to the first low-voltage load terminal 510 according to any one of the first battery pack 100, the second battery pack 110 and the first DCDC circuit 200, and the second voltage can be provided to the second low-voltage load terminal 520 at the same time. Through the power supply architecture of the present application, a low-voltage battery can be used to provide a variety of required low voltages for the vehicle, without the need for regular maintenance and replacement of multiple low-voltage batteries, which is conducive to reducing the occupied space of the battery and the layout and simplification of the electric control system.

[0143] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments 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. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0144] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0145] 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 merely schematic. For example, the division of modules or units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0146] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0147] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0148] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions 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 battery distribution architecture, characterized in that: include: A first battery pack includes at least two battery cells connected in series; a second battery pack, comprising some of the battery cells in the first battery pack; A first DCDC circuit, used to realize conversion between a first voltage and a second voltage; a power distribution circuit, connected to the first battery pack, the second battery pack and the first DCDC circuit, for providing a first voltage to a first low-voltage load terminal, or providing a second voltage to a second low-voltage load terminal, for at least one of the first battery pack, the second battery pack and the first DCDC circuit; The main control circuit is used to control the power distribution circuit and the first DCDC circuit to provide corresponding voltages for the first low-voltage load end and the second low-voltage load end.

2. The low-voltage battery distribution architecture according to claim 1, characterized in that: The low voltage battery distribution architecture includes: A power supply end, connected to the power distribution circuit, for receiving a third voltage and outputting the third voltage to the power distribution circuit; The power distribution circuit is further configured to output a first voltage to the first DCDC circuit, the first battery pack or the first low-voltage load terminal according to the third voltage.

3. The low-voltage battery distribution architecture according to claim 2, characterized in that: The low voltage battery distribution architecture includes: The second DCDC circuit is connected between the power battery pack and the power supply end, and is used for converting the voltage output by the power battery pack into the third voltage and outputting it to the power supply end.

4. The low-voltage battery distribution architecture according to claim 2, characterized in that: The low voltage battery distribution architecture includes: The third DCDC circuit is connected between the generator and the power supply end, and is used for converting the voltage output by the generator into the third voltage and outputting it to the power supply end.

5. The low-voltage battery distribution architecture according to claim 1, characterized in that: The power distribution circuit comprises: The first load switch unit is connected between the first battery pack and the first low-voltage load end. The first load switch unit is controlled by the main control circuit to control the connection state between the first battery pack and the first low-voltage load end.

6. The low-voltage battery distribution architecture according to claim 1, characterized in that: The power distribution circuit comprises: The first bidirectional switch unit is connected between the first battery pack and the first low-voltage load end, and the first bidirectional switch unit is controlled by the main control circuit to control the energy transfer direction between the first battery pack and the first low-voltage load end.

7. The low-voltage battery distribution architecture according to claim 2, characterized in that: The power distribution circuit comprises: The second bidirectional switch unit is connected between the power supply end and the first low-voltage load end, and the second bidirectional switch unit is controlled by the main control circuit to control the energy transfer direction between the power supply end and the first low-voltage load end.

8. The low-voltage battery distribution architecture according to claim 1, characterized in that: The power distribution circuit comprises: The third bidirectional switch unit is connected between the first DCDC circuit and the first low-voltage load end, and the third bidirectional switch unit is controlled by the main control circuit to control the energy transfer direction between the first DCDC circuit and the first low-voltage load end.

9. The low-voltage battery power distribution architecture according to any one of claims 2 to 8, characterized in that: The power distribution circuit comprises: The second load switch unit is connected between the first DCDC circuit and the second low-voltage load end, and the second load switch unit is controlled by the main control circuit to control the connection state between the first DCDC circuit and the second low-voltage load end.

10. The low-voltage battery power distribution architecture according to claim 9, characterized in that: The power distribution circuit comprises: The fourth bidirectional switch unit is connected between the first DCDC circuit and the second low-voltage load end, and the fourth bidirectional switch unit is controlled by the main control circuit to control the energy transfer direction between the first DCDC circuit and the second low-voltage load end.

11. The low-voltage battery power distribution architecture according to claim 9, characterized in that: The power distribution circuit comprises: A fifth bidirectional switch unit is connected between the second battery pack and the second low-voltage load end. The fifth bidirectional switch unit is controlled by the main control circuit to control the energy transfer direction between the second battery pack and the second low-voltage load end.

12. The low-voltage battery distribution architecture according to any one of claims 2-4 and 7, characterized in that: The main control circuit is further used to control the working state of the power distribution circuit when the power level of the first battery pack is less than a first preset value, so as to control the power distribution circuit to supplement power for the first battery pack according to the third voltage.

13. The low-voltage battery distribution architecture according to any one of claims 2-4 and 7, characterized in that: The main control circuit is also used to control the working status of the distribution circuit and the first DCDC circuit when the power of the second battery pack is less than a second preset value, so as to control the third voltage input from the power supply end to supplement the power of the second battery pack via the distribution circuit and the first DCDC circuit.

14. The low-voltage battery distribution architecture according to any one of claims 2-4 and 7, characterized in that: The main control circuit is also used to control the working states of the distribution circuit and the first DCDC circuit when the power supply end is powered on, so as to control the third voltage input from the power supply end to provide the first voltage to the first low-voltage load end via the distribution circuit, and to provide the second voltage to the second low-voltage load end via the distribution circuit and the first DCDC circuit.

15. The low-voltage battery distribution architecture according to any one of claims 2-4 and 7, characterized in that: The main control circuit is also used to control the third voltage input from the power supply end to provide the first voltage to the first low-voltage load end via the distribution circuit when the first DCDC circuit fails, and to replenish power for the first battery pack, and to control the second battery pack to provide the second voltage to the second low-voltage load end via the distribution circuit.

16. A car, characterized in that: The vehicle comprises a low-voltage battery power distribution architecture as claimed in any one of claims 1 to 15.

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