Power supply system, battery system, vehicle, and power supply control method

Abstract

The invention discloses a power supply system, a battery system, a vehicle and a power supply control method.The power supply system comprises a first battery, a second battery and a bidirectional direct current conversion module, the first battery is connected with a first load, the second battery is connected with a second load, and the bidirectional direct current conversion module is connected between the first battery and the second battery; the control module is used for controlling the first battery to supply power to the first load and controlling the first battery and the second battery to supply power to the second load together when the state parameter of the first battery meets a first power supply condition; or when the state parameter of the second battery meets a second power supply condition, the second battery is controlled to supply power to the second load, and the second battery and the first battery are controlled to supply power to the first load together; wherein the first power supply condition represents that the state parameter of the first battery is higher than the power supply demand parameter of the first load, and the second power supply condition represents that the state parameter of the second battery is higher than the power supply demand parameter of the second load.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more particularly to a power supply system, a battery system, a vehicle, and a power supply control method. Background Technology

[0002] With the rapid development of the automotive industry, "energy conservation" and "emission reduction" have become the main themes of automotive industrial development. New energy vehicles, represented by pure electric vehicles and plug-in hybrid vehicles, are receiving increasing attention and recognition. Currently, the driving range of new energy vehicles is one of the most important concerns for users.

[0003] In related technologies, increasing battery capacity is usually used to increase the driving range of new energy vehicles, but this method results in a large investment in the overall cost of the vehicle. Summary of the Invention

[0004] This application proposes a power supply system, a battery system, a vehicle, and a power supply control method, which utilizes a first battery and a second battery to charge each other, thereby increasing the vehicle's driving range while reducing costs and improving the vehicle's driving safety.

[0005] The technical solution of this application is implemented as follows:

[0006] In a first aspect, embodiments of this application provide a power supply system, which includes a first battery, a second battery, and a bidirectional DC-DC converter module, wherein:

[0007] The first battery is connected to the first load, the second battery is connected to the second load, and the bidirectional DC-DC converter module is connected between the first battery and the second battery.

[0008] A bidirectional DC-DC converter module is used to control the first battery to supply power to the first load when the state parameters of the first battery meet the first power supply condition, and to control the first battery and the second battery to supply power to the second load together; or to control the second battery to supply power to the second load when the state parameters of the second battery meet the second power supply condition, and to control the second battery and the first battery to supply power to the first load together.

[0009] The first power supply condition indicates that the state parameters of the first battery are higher than the power supply demand parameters of the first load, and the second power supply condition indicates that the state parameters of the second battery are higher than the power supply demand parameters of the second load.

[0010] Through the aforementioned technical means, the first battery is connected to the first load to provide power to the first load, and the second battery is connected to the second load to provide power to the second load. Furthermore, a bidirectional DC-DC converter module is connected between the first and second batteries. When the state parameters of the first battery meet the first power supply condition, the bidirectional DC-DC converter module controls the first battery to supply power to the first load, and controls both the first and second batteries to jointly supply power to the second load; alternatively, when the state parameters of the second battery meet the second power supply condition, the bidirectional DC-DC converter module controls the second battery to supply power to the second load, and controls both the second and first batteries to jointly supply power to the first load. Thus, the second battery replaces the original battery in the vehicle, thereby reducing costs. In addition, this system employs dual-battery redundancy backup, and the bidirectional DC-DC converter module allows the first battery to also supply power to the second load, or vice versa, thereby meeting the requirements of autonomous driving and preventing the vehicle from malfunctioning due to sudden power loss, thus improving vehicle safety.

[0011] In some embodiments, the battery voltage corresponding to the first battery is higher than the battery voltage corresponding to the second battery.

[0012] Through the above-mentioned technical means, since the corresponding battery voltage of the first battery is higher than that of the second battery, the first battery can be used to supply power to the high-voltage load and the second battery can be used to supply power to the low-voltage load, so that the load can operate normally and thus ensure the safe driving of the vehicle.

[0013] In some embodiments, the power supply system further includes a first power distribution module and a second power distribution module; wherein: the first power distribution module is connected between the first battery and the first load, and is used to control the first battery to supply power to the first load; the second power distribution module is connected between the second battery and the second load, and is used to control the second battery to supply power to the second load.

[0014] By using the above-mentioned technical means, the first power distribution module is connected to the first battery, which can control the first battery to supply power to the first load. The second power distribution module is connected to the second battery, which can control the second battery to supply power to the second load. This ensures that the first load and the second load can operate stably and safely, thereby ensuring the safe driving of the vehicle.

[0015] In some embodiments, the bidirectional DC-DC converter module is configured to, when the state parameters of the first battery meet the first power supply condition and the state parameters of the second battery are lower than the power supply requirement parameters of the second load, control the bidirectional DC-DC converter module to be in a first operating mode, convert the output power of the first battery into a first power supply power and supply it to the second load through the second power distribution module; or, the bidirectional DC-DC converter module is configured to, when the state parameters of the second battery meet the second power supply condition and the state parameters of the first battery are lower than the power supply requirement parameters of the first load, control the bidirectional DC-DC converter module to be in a second operating mode, convert the output power of the second battery into a second power supply power and supply it to the first load through the first power distribution module.

[0016] Using the aforementioned technical means, when the state parameters of the second battery are lower than the power supply requirements of the second load (i.e., the power of the second battery is insufficient to maintain the normal operation of the second load), if the state parameters of the first battery meet the first power supply conditions, the bidirectional DC-DC converter module can be controlled to operate in the first mode, so that the output power of the first battery is converted and supplied to the second load through the second power distribution module. This maintains the normal operation of the second load and improves the driving safety of the vehicle. Alternatively, when the state parameters of the first battery are lower than the power supply requirements of the first load (i.e., the power of the first battery is insufficient to maintain the normal operation of the first load), if the state parameters of the second battery meet the second power supply conditions, the bidirectional DC-DC converter module can be controlled to operate in the second mode, so that the output power of the second battery is converted and supplied to the first load through the first power distribution module. This maintains the normal operation of the first load and improves the driving safety of the vehicle.

[0017] In some embodiments, the power supply system further includes a unidirectional DC-DC converter module connected between the second power distribution module and the second load; wherein: the unidirectional DC-DC converter module is used to convert the output voltage of the second power distribution module into a target voltage and provide the target voltage to the second load when the output voltage of the second power distribution module is inconsistent with the required voltage of the second load.

[0018] By employing the aforementioned technical means, when the output voltage of the second power distribution module is inconsistent with the required voltage of the second load, the output voltage of the second power distribution module is converted into the target voltage, and the target voltage is supplied to the second load. This also maintains the normal operation of the second load and improves the driving safety of the vehicle.

[0019] In some embodiments, the bidirectional DC-DC converter module is configured to control the bidirectional DC-DC converter module to operate in a first working mode when the state parameters of the first battery meet the first power supply condition and the state parameters of the second battery are lower than the first preset parameter threshold, converting the output power of the first battery into a third power supply and providing it to charge the second battery; or, the bidirectional DC-DC converter module is configured to control the bidirectional DC-DC converter module to operate in a second working mode when the state parameters of the second battery meet the second power supply condition and the state parameters of the first battery are lower than the second preset parameter threshold, converting the output power of the second battery into a fourth power supply and providing it to charge the first battery.

[0020] Using the aforementioned technical means, when the state parameters of the second battery are lower than the first preset parameter threshold (i.e., the second battery's charge is insufficient), if the state parameters of the first battery meet the first power supply condition, the bidirectional DC-DC converter module can be controlled to operate in a first working mode to convert the output power of the first battery and charge the second battery. Alternatively, when the state parameters of the first battery are lower than the second preset parameter threshold (i.e., the first battery's charge is insufficient), if the state parameters of the second battery meet the second power supply condition, the bidirectional DC-DC converter module can be controlled to operate in a second working mode to convert the output power of the second battery and charge the first battery. Thus, by using the first and second batteries to charge each other, the driving range can be increased while maintaining a lower operating cost. Moreover, the dual-battery redundancy backup not only meets the needs of autonomous driving but also avoids sudden power loss, improving vehicle driving safety.

[0021] In some embodiments, the power supply system further includes an AC conversion module connected to the first battery; wherein: the AC conversion module is used to, when connected to an AC charging device, convert the output power of the AC charging device into AC-DC power to obtain a fifth power supply, and provide the fifth power supply to charge the first battery.

[0022] Through the above-mentioned technical means, when the AC conversion module is connected to the AC charging device, the AC conversion module charges the first battery by converting the output power of the AC charging device from AC to DC, thereby increasing the capacity of the first battery and maintaining the normal operation of the load.

[0023] Secondly, embodiments of this application provide a battery system including a battery module and a power supply system as described in any one of the first aspects.

[0024] Through the aforementioned technical means, since the battery system includes the aforementioned power supply system, by managing the power supply of the first battery and the second battery, the first battery can supply power to the second battery or the second load, or the second battery can supply power to the first battery or the first load; thereby effectively increasing the driving range, and eliminating the original battery in the vehicle, it can also reduce costs; in addition, since the battery system adopts dual-battery redundancy backup, it can also avoid sudden power loss and increase safety.

[0025] Thirdly, this application provides a vehicle that includes the battery system described in the second aspect.

[0026] By employing the aforementioned technical means, and since the vehicle includes the aforementioned battery system, the first battery and the second battery can charge each other, thereby meeting the needs of autonomous driving and preventing sudden power loss, thus improving the vehicle's driving safety.

[0027] Fourthly, embodiments of this application provide a power supply control method, which includes:

[0028] When the state parameters of the first battery meet the first power supply condition, the first battery is controlled by the bidirectional DC-DC converter module to supply power to the first load, and the first battery and the second battery are controlled together to supply power to the second load.

[0029] When the state parameters of the second battery meet the second power supply conditions, the second battery is controlled by the bidirectional DC-DC converter module to supply power to the second load, and the second battery and the first battery are controlled together to supply power to the first load.

[0030] The first power supply condition indicates that the state parameters of the first battery are higher than the power supply demand parameters of the first load, and the second power supply condition indicates that the state parameters of the second battery are higher than the power supply demand parameters of the second load.

[0031] Through the aforementioned technical means, when the state parameters of the first battery meet the first power supply condition, the bidirectional DC-DC converter module controls the first battery to supply power to the first load, and controls both the first and second batteries to supply power to the second load; or when the state parameters of the second battery meet the second power supply condition, the bidirectional DC-DC converter module controls the second battery to supply power to the second load, and controls both the second and first batteries to supply power to the first load. In this way, the second battery replaces the original battery in the vehicle, thereby reducing costs. Furthermore, this system employs dual-battery redundancy backup, and the bidirectional DC-DC converter module allows the first battery to supply power to the second load, or vice versa, thus meeting the requirements of autonomous driving and preventing sudden power loss, thereby improving vehicle driving safety.

[0032] In some embodiments, when the state parameters of the first battery meet the first power supply condition, the power supply control method further includes: when the state parameters of the first battery meet the first power supply condition and the state parameters of the second battery are lower than the power supply demand parameters of the second load, controlling the bidirectional DC-DC converter module to be in a first operating mode, converting the output power of the first battery into a first power supply power and supplying it to the second load through the second power distribution module; or, when the state parameters of the first battery meet the first power supply condition and the state parameters of the second battery are lower than a first preset parameter threshold, controlling the bidirectional DC-DC converter module to be in a first operating mode, converting the output power of the first battery into a third power supply power and supplying it to charge the second battery.

[0033] Using the aforementioned technical means, when the state parameters of the second battery are lower than the power supply requirements of the second load (i.e., the second battery's charge is insufficient to maintain the normal operation of the second load), if the state parameters of the first battery meet the first power supply condition, the bidirectional DC-DC converter module can be controlled to operate in a first mode, so that the output power of the first battery is converted and supplied to the second load through the second power distribution module. Alternatively, when the state parameters of the second battery are lower than a first preset parameter threshold (i.e., the second battery's charge is insufficient), if the state parameters of the first battery meet the first power supply condition, the bidirectional DC-DC converter module can be controlled to operate in a first mode, so that the output power of the first battery is converted and used to charge the second battery, enabling the second battery to supply power to the second load. Thus, by supplying power to the second load from the first battery or the second battery itself, the normal operation of the second load can be maintained, improving vehicle driving safety.

[0034] In some embodiments, when the state parameters of the second battery meet the second power supply condition, the power supply control method further includes: when the state parameters of the second battery meet the second power supply condition and the state parameters of the first battery are lower than the power supply demand parameters of the first load, controlling the bidirectional DC-DC converter module to be in a second operating mode, converting the output power of the second battery into a second power supply power and supplying it to the first load through the first power distribution module; or, when the state parameters of the second battery meet the second power supply condition and the state parameters of the first battery are lower than a second preset parameter threshold, controlling the bidirectional DC-DC converter module to be in a second operating mode, converting the output power of the second battery into a fourth power supply power and supplying it to charge the first battery.

[0035] Through the aforementioned technical means, when the state parameters of the first battery are lower than the power supply requirements of the first load (i.e., the first battery's charge is insufficient to maintain the normal operation of the first load), if the state parameters of the second battery meet the second power supply conditions, the bidirectional DC-DC converter module can be controlled to operate in a second mode, so that the output power of the second battery is converted and supplied to the first load through the first power distribution module. Alternatively, when the state parameters of the first battery are lower than a second preset parameter threshold (i.e., the first battery's charge is insufficient), if the state parameters of the second battery meet the second power supply conditions, the bidirectional DC-DC converter module can be controlled to operate in a second mode, so that the output power of the second battery is converted and supplied to the first battery, enabling the first battery to supply power to the first load. Thus, by supplying power to the first load from the second battery or the first battery, the normal operation of the first load can be maintained, improving safety and enhancing vehicle driving safety.

[0036] In some embodiments, the power supply control method further includes: when the output voltage of the second power distribution module is inconsistent with the required voltage of the second load, converting the output voltage of the second power distribution module into a target voltage through a unidirectional DC-DC converter module, and providing the target voltage to the second load for power supply.

[0037] By employing the aforementioned technical means, when the output voltage of the second power distribution module is inconsistent with the required voltage of the second load, the output voltage of the second power distribution module is converted into the target voltage, and the target voltage is supplied to the second load. This also maintains the normal operation of the second load and improves the driving safety of the vehicle.

[0038] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory, and are not intended to limit the technical solutions of this application. Attached Figure Description

[0039] Figure 1 A schematic diagram of the composition structure of a power supply system provided in this application embodiment. Figure 1

[0040] Figure 2 A schematic diagram of the composition structure of a power supply system provided in this application embodiment. Figure 2 ;

[0041] Figure 3 A schematic diagram of the composition structure of a power supply system provided in this application embodiment. Figure 3 ;

[0042] Figure 4 A schematic diagram of the composition structure of a power supply system provided in this application embodiment. Figure 4 ;

[0043] Figure 5 A schematic flowchart illustrating a power supply control method provided in an embodiment of this application;

[0044] Figure 6 This is a schematic diagram of the composition structure of a battery system provided in an embodiment of this application;

[0045] Figure 7 This is a schematic diagram illustrating an application scenario of a battery system provided in an embodiment of this application;

[0046] Figure 8 This is a schematic diagram of the composition structure of a vehicle provided in an embodiment of this application. Detailed Implementation

[0047] In order to gain a more detailed understanding of the features and technical content of the embodiments of this application, the implementation of the embodiments of this application will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for reference and illustration only and are not intended to limit the embodiments of this application.

[0048] 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 this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.

[0049] In the following description, references are made to “some embodiments,” which describe a subset of all possible embodiments. However, it is understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0050] It should also be noted that the terms "first, second, and third" used in the embodiments of this application are only used to distinguish similar objects and do not represent a specific order of objects. It is understood that "first, second, and third" can be interchanged in a specific order or sequence where permitted, so that the embodiments of this application described herein can be implemented in an order other than that illustrated or described herein.

[0051] Furthermore, the reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0052] The following section provides a description of the relevant technologies used in this application.

[0053] New energy batteries are being used more and more widely in daily life and industry. For example, new energy vehicles equipped with batteries are already widely used. In addition, batteries are being used more and more in the field of energy storage.

[0054] Currently, new energy batteries are being used more and more widely in daily life and industry. They are not only used in energy storage systems for hydropower, thermal power, wind power, and solar power plants, but also extensively in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields. With the continuous expansion of the application areas of power batteries, the market demand is also constantly increasing.

[0055] In this application embodiment, the battery can be a single battery cell or a battery pack composed of multiple battery cells. A single battery cell refers to a basic unit capable of converting chemical energy into electrical energy, and can be used to manufacture battery modules or battery packs to supply power to electrical devices. A single battery cell can be a rechargeable battery, which is a battery cell that can be recharged after discharge to activate its active materials and continue to be used. A single battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and this disclosure embodiment is not limited to this.

[0056] In this embodiment, the battery may also be a single physical module comprising one or more battery cells to provide higher voltage and capacity. When there are multiple battery cells, the multiple battery cells are connected in series, parallel, or mixed via a busbar.

[0057] Furthermore, with the rapid development of the automotive industry, "energy conservation" and "emission reduction" have become the main themes of automotive industrial development. New energy vehicles, represented by pure electric vehicles and plug-in hybrid electric vehicles, are receiving increasing attention and recognition. Currently, the driving range of new energy vehicles is one of the most pressing concerns for users. In related technologies, increasing battery capacity is typically used to increase the driving range of new energy vehicles; however, increasing battery capacity leads to a significant increase in cost, resulting in low cost-effectiveness.

[0058] Based on this, embodiments of this application provide a power supply system, a battery system, a vehicle, and a power supply control method. The power supply system includes a first battery, a second battery, and a bidirectional DC-DC converter module. The first battery is connected to a first load and can supply power to the first load; the second battery is connected to a second load and can supply power to the second load. The bidirectional DC-DC converter module is connected between the first and second batteries. When the state parameters of the first battery meet a first power supply condition, the bidirectional DC-DC converter module controls the first battery to supply power to the first load, and controls both the first and second batteries to supply power to the second load; or when the state parameters of the second battery meet a second power supply condition, the bidirectional DC-DC converter module controls the second battery to supply power to the second load, and controls both the second and first batteries to supply power to the first load. Thus, the second battery replaces the original battery in the vehicle, thereby reducing costs. Furthermore, the use of dual-battery redundancy, and the bidirectional DC-DC converter module allowing the first battery to supply power to the second load, or the second battery to supply power to the first load, meets the requirements of autonomous driving and avoids sudden power outages, improving vehicle driving safety.

[0059] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0060] In one embodiment of this application, Figure 1 A schematic diagram of the composition structure of a power supply system provided in this application embodiment. Figure 1 .like Figure 1 As shown, the power supply system 10 may include a first battery 101, a second battery 102, and a bidirectional DC-DC converter module 103, wherein:

[0061] The first battery 101 is connected to the first load 11, the second battery 102 is connected to the second load 12, and the bidirectional DC-DC converter module 103 is connected between the first battery 101 and the second battery 102.

[0062] The bidirectional DC-DC converter module 103 is used to control the first battery 101 to supply power to the first load 11 when the state parameters of the first battery 101 meet the first power supply condition, and to control the first battery 101 and the second battery 102 to supply power to the second load 12 together; or to control the second battery 102 to supply power to the second load 12 when the state parameters of the second battery 102 meet the second power supply condition, and to control the second battery 102 and the first battery 101 to supply power to the first load 11 together.

[0063] In this embodiment of the application, the first battery 101 is connected to the first load 13 and can supply power to the first load 11 to maintain the normal operation of the first load 11; the second battery 102 is connected to the second load 12 and can supply power to the second load 12 to maintain the normal operation of the second load 12.

[0064] In this embodiment, when the state parameters of the first battery 101 meet the first power supply condition, the first battery 101 can be controlled to supply power to the second battery 102, or to supply power to the second load 12, or both the first and second batteries 101 can be controlled to supply power to the second load 12. Similarly, when the state parameters of the second battery 102 meet the second power supply condition, the second battery 102 can be controlled to supply power to the first battery 101, or to supply power to the first load 11, or both the second and first batteries 101 can be controlled to supply power to the first load 11. Here, the first power supply condition indicates that the state parameters of the first battery 101 are higher than the power supply requirement parameters of the first load 11, and the second power supply condition indicates that the state parameters of the second battery 102 are higher than the power supply requirement parameters of the second load 12. In other words, the first power supply condition indicates that the output power of the first battery 101 is greater than the power required by the first load 11, that is, when the output power of the first battery 101 is in surplus, it can supply power to the second load 12 or the second battery 102; the second power supply condition indicates that the output power of the second battery 102 is greater than the power required by the second load 12, that is, when the output power of the second battery 102 is in surplus, it can supply power to the first load 11 or the first battery 101.

[0065] In this embodiment, the state parameters can be battery voltage, battery current, remaining charge (SOC), and output power, etc. Correspondingly, the power supply demand parameters can be demand voltage, demand current, demand charge, and demand power, etc. Here, the state parameters and power supply demand parameters correspond, and the specific parameters they contain are not specifically limited.

[0066] For example, if the SOC of the second battery 102 is insufficient to maintain the power supply requirements of the second load 12, and the state parameters of the first battery 101 are detected and it is determined that the state parameters of the first battery 101 meet the first power supply condition, then the first battery 101 can be controlled to supply power to the second load 12, or the first battery 101 and the second battery 102 can be controlled to jointly supply power to the second load, or the first battery 101 can be controlled to charge the second battery 102 while simultaneously supplying power to the second load 12. No limitations are imposed here; the specific method will be determined based on the actual situation.

[0067] In this embodiment, for both the first and second power supply conditions, the battery state parameters need to be greater than a preset parameter range. The preset parameter range can be determined based on the specific conditions of the vehicle. For example, if the power demand of the second load 12 is low, assuming the second battery 102 is at 20% SOC, and the second load 12 can maintain normal operation, then the second battery 102 can continue to discharge to supply power to the second load 12 to maintain its operation. If the power demand parameters of the second load 12 are high, assuming the second battery is at 20% SOC, and the second load 12 cannot maintain normal operation, then if the second battery 102 continues to discharge to supply power to the second load 12, it will cause over-discharge of the second battery 102, resulting in a safety problem. In this case, the first battery 101 can charge the second battery 102, or the first battery 101 and the second battery 102 can jointly supply power to the second load 12.

[0068] In some embodiments, such as Figure 2 As shown, the power supply system 10 may further include a first power distribution module 104 and a second power distribution module 105; wherein: the first power distribution module 104 is connected between the first battery 101 and the first load 11, and is used to control the first battery 101 to supply power to the first load 11; the second power distribution module 105 is connected between the second battery 102 and the second load 12, and is used to control the second battery 102 to supply power to the second load 12.

[0069] In this embodiment of the application, when the state parameters of the first battery 101 meet the power supply requirements of the first load 11, the first load 11 can be powered by the first power distribution module 104; when the state parameters of the second battery 102 meet the power supply requirements of the second load 12, the second load 12 can be powered by the second power distribution module 105.

[0070] In this embodiment of the application, the first power distribution module 104 and the second power distribution module 105 can be modules that integrate switches or fuses. The opening and closing states of their internal switches can control the circuits that need to be turned on to be turned on, and the circuits that need to be turned off to be turned off.

[0071] Furthermore, for the first load 11 and the second load 12, the first load 11 can be a high-voltage load and the second load 12 can be a low-voltage load; or, the first load 11 can be a low-voltage load and the second load 12 can be a high-voltage load. The high-voltage load can be electrical equipment in the vehicle that operates at a higher voltage, such as the vehicle's drive system, while the low-voltage load can be electrical equipment in the vehicle that operates at a lower voltage, such as the vehicle's lighting system. Therefore, the power supply requirements of the high-voltage load are higher than those of the low-voltage load.

[0072] For example, assuming the first load 11 is a high-voltage load and the second load 12 is a low-voltage load; correspondingly, the first power distribution module 104 is a high-voltage power distribution module and the second power distribution module 105 is a low-voltage power distribution module. In one possible implementation, the first load 11 may include a motor drive (or electric drive), and the motor drive is connected to the first power distribution module 104 and the first load 11 to convert the output power provided by the first power distribution module 104 into mechanical energy to drive the vehicle. Here, the first power distribution module 104 may be referred to as a high-voltage distribution box, and the second power distribution module 105 may be referred to as a low-voltage distribution box.

[0073] It is understood that by connecting the first power distribution module 104 to the first battery 101, the first battery 101 can be controlled to supply power to the first load 11. By connecting the second power distribution module 105 to the second battery 102, the second battery 102 can be controlled to supply power to the second load 12. This ensures that the first load 11 and the second load 12 can operate stably and safely, thereby ensuring the safe driving of the vehicle.

[0074] It should also be noted that, in this embodiment, the batteries are configured using a combination of a first battery 101 and a second battery 102. In some embodiments, the voltage of the first battery 101 can be higher than the voltage of the second battery 102. Accordingly, the first battery 101 can be a power battery, also known as a high-voltage battery, and the second battery 102 can be a low-voltage battery. Therefore, the first battery 101 can be used to power the first load 11, and the second battery 102 can power the second load 12, to meet the power supply requirements of the first load 11 and the second load 12 respectively.

[0075] It should be noted that in this field, the concepts of high voltage and low voltage are relative. For example, a device with a voltage to ground of 1000V or below can be referred to as low voltage (or simply "low voltage"); a device with a voltage to ground of 1000V or above can be referred to as high voltage (or simply "high voltage"). Here, high voltage usually refers to bus voltage, battery voltage, etc., above 1000V, without any limitation.

[0076] It should also be noted that for new energy vehicles, batteries with a voltage of 200V or higher can be called high-voltage batteries, while those with a voltage below 200V can be called low-voltage batteries. Therefore, the voltage of a high-voltage battery is higher than that of a low-voltage battery. High-voltage batteries are typically power batteries. For example, the voltage range of power batteries is usually between 200 volts (V) and 760V, with the specific voltage depending on the vehicle manufacturer's design standards. For instance, the voltage of power batteries in pure electric vehicles is generally close to 400V. Low-voltage batteries typically have a voltage range between 12V and 200V, with the specific voltage also depending on the vehicle manufacturer's design standards.

[0077] It is important to note that the cost of power battery cells is relatively high, while the cost of low-voltage battery cells is relatively low. Directly increasing the capacity of the power battery to increase the driving range would lead to increased costs. Therefore, this application embodiment uses a combination of a power battery and a low-voltage battery to reduce costs while increasing the vehicle's driving range. Furthermore, the low-voltage battery in this application embodiment differs from the vehicle's storage battery. A low-voltage battery has the characteristics of storing more electrical energy (i.e., charge) and having a lower output voltage, while a storage battery has the characteristics of storing less electrical energy and having a lower output voltage. It is evident that both low-voltage batteries and storage batteries have low output voltages, but low-voltage batteries can store more electrical energy than storage batteries. Here, a second battery 102 replaces the original storage battery in the vehicle. In this case, the original storage battery in the vehicle is no longer needed to supply power to the low-voltage load, thus eliminating the need for the original storage battery and reducing costs.

[0078] It is understood that, in this embodiment of the application, since the battery voltage of the first battery 101 is higher than that of the second battery 102, the first battery 101 can be used to power the high-voltage load and the second battery 102 can be used to power the low-voltage load, so that the load can operate normally and thus ensure the safe driving of the vehicle.

[0079] This application provides a power supply system that effectively increases the driving range by allowing a first battery and a second battery to charge each other, thus achieving a range extension effect. Simultaneously, the second battery replaces the original battery in the vehicle, thereby reducing costs. Furthermore, the system employs dual-battery redundancy backup, and a bidirectional DC-DC converter module allows the first battery to power a second load, or vice versa, thereby meeting the needs of autonomous driving and preventing sudden power outages, thus improving vehicle driving safety.

[0080] In another embodiment of this application, the operating mode of the bidirectional DC-DC converter module 103 may include a first operating mode and a second operating mode; wherein, the first operating mode is used to characterize the buck conversion operating mode, and the second operating mode is used to characterize the boost conversion operating mode.

[0081] In this embodiment, the bidirectional DC-DC converter module 103 can be a bidirectional DC-DC converter circuit. The bidirectional DC-DC circuit can achieve bidirectional conversion of electrical energy or voltage (i.e., buck conversion and boost conversion). Specifically, it can convert high-voltage DC to low-voltage DC, or vice versa, thereby achieving voltage regulation and matching.

[0082] In some embodiments, the bidirectional DC-DC converter module 103 is configured to, when the state parameters of the first battery 101 meet the first power supply condition and the state parameters of the second battery 102 are lower than the power supply requirement parameters of the second load 12, control the bidirectional DC-DC converter module 103 to be in a first operating mode, convert the output power of the first battery 101 into a first power supply power and supply it to the second load 12 through the second power distribution module 105; or...

[0083] The bidirectional DC-DC converter module 103 is used to control the bidirectional DC-DC converter module 103 to be in a second working mode when the state parameters of the second battery 102 meet the second power supply conditions and the state parameters of the first battery 101 are lower than the power supply demand parameters of the first load 11, so as to convert the output power of the second battery 102 into the second power supply power and supply it to the first load 11 through the first power distribution module 104.

[0084] In this embodiment, when the state parameter of the second battery 102 is lower than the power supply requirement parameter of the second load 12, the state parameter of the first battery 101 is determined to be higher than the first power supply condition by detecting the state parameter of the first battery 101. At this time, the bidirectional DC-DC converter module 103 can be controlled to be in the first working mode so as to perform step-down conversion on the output power of the first battery 101, and the converted first power supply is provided to the second load 12 through the second power distribution module 105 to meet the power supply requirement parameter of the second load 12.

[0085] In this embodiment, when the state parameter of the first battery 101 is lower than the power supply requirement parameter of the first load 11, the state parameter of the second battery 102 is detected and determined to be higher than the second power supply condition. At this time, the bidirectional DC-DC converter module 103 can be controlled to be in the second working mode so as to boost the output power provided by the second battery 102 and provide the converted second power supply to the first load 11 through the first power distribution module 104 to meet the power supply requirement parameter of the first load 11.

[0086] In this embodiment of the application, when the first battery 101 supplies power to the second load 12, it can be determined whether the second battery 102 supplies power to the second load based on the state parameters of the second battery 102; similarly, when the second battery 102 supplies power to the first load 11, it can also be determined whether the first battery 101 supplies power to the first load 11 based on the state parameters of the first battery 101.

[0087] In other words, under certain circumstances, the first battery 101 can supply power to the second load 12 through the bidirectional DC-DC converter module 103, and the second battery 102 can also supply power to the first load 11 through the bidirectional DC-DC converter module 103. Thus, if the first battery 101 fails, the output power of the second battery 102 can be boosted by the bidirectional DC-DC converter module 103 before supplying power to the first load 11, avoiding the problem of the vehicle being unable to move due to a sudden power outage and improving vehicle driving safety. Furthermore, when the second battery 102 cannot maintain the normal operation of the second load 12, the output power of the first battery 101 can be bucked by the bidirectional DC-DC converter module 103 before supplying power to the second load 12 to maintain its normal operation.

[0088] Thus, in this embodiment, when the state parameters of the second battery 102 are lower than the power supply requirements of the second load 12 (i.e., the charge of the second battery 102 is insufficient to maintain the normal operation of the second load 12), if the state parameters of the first battery 101 meet the first power supply conditions, the bidirectional DC-DC converter module 103 can be controlled to operate in the first mode, so that the output power of the first battery 101 is converted and supplied to the second load through the second power distribution module 105. This can maintain the normal operation of the second load 12 and improve the driving safety of the vehicle. Alternatively, when the state parameters of the first battery 101 are lower than the power supply requirements of the first load 11 (i.e., the charge of the first battery 101 is insufficient to maintain the normal operation of the first load 11), if the state parameters of the second battery 102 meet the second power supply conditions, the bidirectional DC-DC converter module 103 can be controlled to operate in the second mode, so that the output power of the second battery 102 is converted and supplied to the first load 11 through the first power distribution module 103. This can maintain the normal operation of the first load 11 and improve the driving safety of the vehicle.

[0089] In some embodiments, the bidirectional DC-DC converter module 103 is configured to, when the state parameters of the first battery 101 meet the first power supply condition and the state parameters of the second battery 102 are lower than a first preset parameter threshold, control the bidirectional DC-DC converter module 103 to be in a first operating mode, converting the output power of the first battery 101 into a third power supply and providing it to charge the second battery 102; or...

[0090] The bidirectional DC-DC converter module 103 is used to control the bidirectional DC-DC converter module 103 to be in a second working mode when the state parameters of the second battery 102 meet the second power supply conditions and the state parameters of the first battery 101 are lower than the second preset parameter threshold, so as to convert the output power of the second battery 102 into a fourth power supply power and provide it to charge the first battery 101.

[0091] In this embodiment, when the state parameters of the second battery 102 are lower than the first preset parameter threshold, for example, when the SOC of the second battery 102 is lower than the first preset parameter threshold, it indicates that the power of the second battery 102 is insufficient. At this time, by detecting the state parameters of the first battery 101 and determining that the state parameters of the first battery 101 meet the first power supply condition, the bidirectional DC-DC converter module 103 can be controlled to enter the first operating mode to perform step-down conversion on the output power of the first battery 101 and provide the converted third power supply to charge the second battery 102. Here, the first preset parameter threshold indicates that the state parameters of the second battery 102 can supply power to the second load 12, and the specific value of the first preset threshold is determined according to the second load 12.

[0092] In other words, in this embodiment of the application, when the SOC of the second battery 102 is lower than the first preset parameter threshold and the SOC of the first battery is within the ideal value range (i.e., the first power supply condition is met), the first working mode in the bidirectional DC-DC converter module 103 is activated so that the first battery 101 charges the second battery 102.

[0093] In this embodiment, when the state parameters of the first battery 101 are lower than the second preset parameter threshold, the state parameters of the second battery 102 are detected and determined to meet the second power supply condition. Therefore, the bidirectional DC-DC converter module 103 can be controlled to operate in the second mode to boost the output power provided by the second battery 102 and supply the converted fourth power to the first battery 101 for charging. Here, the second preset parameter threshold indicates that the state parameters of the first battery 101 can supply power to the first load 12. The specific value of the second preset threshold is determined based on the first load 11.

[0094] In other words, in this embodiment of the application, when the SOC of the first battery 101 is lower than the second preset parameter threshold and the SOC of the second battery 102 is within the ideal value range (i.e., the second power supply condition is met), the second working mode in the bidirectional DC-DC converter module 103 is activated so that the second battery 102 charges the first battery 101.

[0095] In some embodiments, the bidirectional DC-DC converter module 103 is configured to, when the state parameters of the first battery 101 meet the first power supply condition and the state parameters of the second battery 102 are lower than the power supply demand parameters of the second load 12 and the state parameters of the second battery 102 are lower than the first preset parameter threshold, control the bidirectional DC-DC converter module 103 to be in a first operating mode, convert the output power of the first battery 101 into a first power supply power and supply it to the second load 12 through the second power distribution module 105, and convert the output power of the first battery 101 into a third power supply power and supply it to the second battery 102 for charging; or, the bidirectional DC-DC converter module 103 is configured to, when the state parameters of the second battery 102 meet the second power supply condition and the state parameters of the first battery 101 are lower than the power supply demand parameters of the first load 11 and the state parameters of the first battery 101 are lower than the second preset parameter threshold, control the bidirectional DC-DC converter module 103 to be in a second operating mode, convert the output power of the second battery 102 into a second power supply power and supply it to the first load 11 through the first power distribution module 104, and convert the output power of the second battery 102 into a fourth power supply power and supply it to the first battery 101 for charging.

[0096] In some embodiments of this application, the first battery 101 can charge the second battery 102 and also supply power to the second load 12, and the second battery 102 can charge the first battery 101 and also supply power to the first load 11.

[0097] Thus, in this embodiment, when the state parameters of the second battery 102 are lower than the first preset parameter threshold (i.e., the second battery 102 has insufficient power), if the state parameters of the first battery 101 meet the first power supply condition, the bidirectional DC-DC converter module 103 can be controlled to operate in the first mode, so that the output power of the first battery 101 is converted to charge the second battery 102. Alternatively, when the state parameters of the first battery 101 are lower than the second preset parameter threshold (i.e., the first battery 101 has insufficient power), if the state parameters of the second battery 102 meet the second power supply condition, the bidirectional DC-DC converter module 103 can be controlled to operate in the second mode, so that the output power of the second battery 102 is converted to charge the first battery 101. In this way, by using the first battery 101 and the second battery 102 to charge each other, the driving range can be increased while maintaining a lower cost. Moreover, the dual-battery redundancy backup not only meets the needs of autonomous driving but also avoids sudden power loss, improving vehicle driving safety.

[0098] This application provides a power supply system in which a bidirectional DC-DC converter module can include a first working mode of buck conversion and a second working mode of boost conversion. This allows the first battery and the second battery to charge each other, and the first battery can supply power to the second load, while the second battery can supply power to the first load. This dual-battery redundancy backup not only meets the needs of autonomous driving but also avoids sudden power outages, thus improving vehicle driving safety.

[0099] In yet another embodiment of this application, Figure 3 A schematic diagram of the composition structure of a power supply system provided in this application embodiment. Figure 3 .like Figure 3 As shown, the power supply system 10 may further include a unidirectional DC-DC converter module 106, which is connected between the second power distribution module 105 and the second load 12; wherein:

[0100] The unidirectional DC-DC converter module 106 is used to convert the output voltage of the second power distribution module 105 into the target voltage and provide the target voltage to the second load 12 when the output voltage of the second power distribution module 105 is inconsistent with the required voltage of the second load 12.

[0101] In this embodiment, the unidirectional DC-DC converter module 106 can be a unidirectional DC-DC circuit. Assuming the required voltage of the second load 12 is 12V, if the output voltage of the second power distribution module 105 is 48V, since the output voltage of the second power distribution module 105 is inconsistent with the required voltage of the second load 12, the unidirectional DC-DC converter module 106 can be controlled to work in buck mode. The unidirectional DC-DC converter module 106 will perform buck conversion on the output voltage of the second power distribution module 105 to convert the output voltage of the second power distribution module 105 to the target voltage to meet the required voltage of the second load 12.

[0102] In this embodiment, the output voltage of the second power distribution module 105 can come from the first battery 101, the second battery 102, or both the first battery 101 and the second battery 102. The voltage is determined based on the state parameters of the first battery 101 and the second battery 102, without any limitation.

[0103] This application provides a power supply system that, when the output voltage of the second power distribution module is inconsistent with the required voltage of the second load, converts the output voltage of the second power distribution module to the target voltage and provides the target voltage to the second load, thereby maintaining the normal operation of the second load and improving the driving safety of the vehicle.

[0104] In yet another embodiment of this application, Figure 4 A schematic diagram of the composition structure of a power supply system provided in this application embodiment. Figure 4 .like Figure 4 As shown, the power supply system 10 may further include an AC converter module 107, which is connected to the first battery 101; wherein:

[0105] The AC converter module 107 is used to convert the output power of the AC charging device 401 from AC to DC to obtain a fifth power supply when connected to the AC charging device 401, and to supply the fifth power supply to charge the first battery.

[0106] In this embodiment, the AC conversion module 107 can be a unidirectional AC-DC converter or a rectifier circuit, capable of converting the output power of the AC charging device 401 into AC-DC power to meet the charging requirements of the first battery 101. Here, the AC charging device 401 can be an AC charging pile, an AC charger, etc.

[0107] In this embodiment, the AC conversion module 107 can also be connected to the second battery 102 via the bidirectional DC conversion module 103. When connected to the AC charging device 401, it converts the output power of the AC charging device 401 from AC to DC to obtain a sixth power supply and provides the sixth power supply to the second battery 102 for charging.

[0108] In some embodiments, the first battery 101 is connected to the DC charging device 402 to provide the output power of the DC charging device 402 to charge the first battery 101; or, the second battery 102 is connected to the DC charging device 402 to provide the output power of the DC charging device 402 to charge the second battery 102.

[0109] It should be noted that, in the embodiments of this application, as Figure 4 As shown, although the DC charging device 402 is not directly connected to the second battery 102, if the first battery 101 is a power battery, due to the internal structural characteristics of the power battery, when connected to the DC charging device 402, the power battery can be used as a wire to charge the second battery 102 through the bidirectional DC charging module 402.

[0110] In this embodiment of the application, when the first battery 101 and the second battery 102 are connected to an external charging device (e.g., an AC charging device 401 and a DC charging device 402), the first battery 101 and the second battery 102 are charged by the external charging device, which enables the first battery 101 and the second battery 102 to store enough power to supply power to the load when the load needs power, so as to maintain the normal operation of the vehicle.

[0111] It should be noted that the first battery 101 and the second battery 102 can constitute a battery module, and the first power distribution module 104, the second power distribution module 105, the unidirectional DC-DC converter module 106, and the AC-DC converter module 107 can constitute an energy management module. It can be understood that the energy management module is used to manage the power supply to the battery module. Furthermore, the energy management module can be located inside or outside the battery module. If the energy management module is located outside the battery module, the two are separate and independent modules.

[0112] This application provides a power supply system in which, when an AC converter module is connected to an AC charging device, the AC converter module charges a first battery by converting the output power of the AC charging device from AC to DC, thereby increasing the capacity of the first battery and enabling the load to operate normally.

[0113] In yet another embodiment of this application, the power supply system is based on the foregoing embodiments. Figure 5 This is a flowchart illustrating a power supply control method provided in an embodiment of this application. Figure 5 As shown, the detailed process may include steps S501 to S502, as follows:

[0114] S501, when the state parameters of the first battery meet the first power supply condition, the bidirectional DC-DC converter module controls the first battery to supply power to the first load, and controls the first battery and the second battery to supply power to the second load together.

[0115] S502, when the state parameters of the second battery meet the second power supply conditions, the bidirectional DC-DC converter module controls the second battery to supply power to the second load, and controls the second battery and the first battery to supply power to the first load together.

[0116] In this embodiment, the power supply control method is applied to the power supply system described in any of the foregoing embodiments. The power supply system may include a first power distribution module, a second power distribution module, a first battery, a second battery, and a bidirectional DC-DC converter module. A first power supply condition indicates that the state parameters of the first battery are higher than the power supply demand parameters of the first load, and a second power supply condition indicates that the state parameters of the second battery are higher than the power supply demand parameters of the second load.

[0117] In this embodiment, the operating modes of the bidirectional DC-DC converter module may include a first operating mode and a second operating mode; wherein, the first operating mode is used to characterize the buck conversion operating mode, and the second operating mode is used to characterize the boost conversion operating mode.

[0118] In this embodiment, when the SOC of the second battery is insufficient or the SOC of the second battery cannot maintain the power supply requirements of the second load, if the state parameters of the first battery meet the first power supply condition, the bidirectional DC-DC converter module can be controlled to be in a first operating mode so that the output power of the first battery is stepped down and then supplied to the second battery or the second load; when the SOC of the first battery is insufficient or the SOC of the first battery cannot maintain the power supply requirements of the first load, if the state parameters of the second battery meet the second power supply condition, the bidirectional DC-DC converter module can be controlled to be in a second operating mode so that the output power of the second battery is stepped up and then supplied to the first battery or the first load.

[0119] In some embodiments, when the state parameters of the first battery satisfy the first power supply condition, the power supply control method may further include:

[0120] When the state parameters of the first battery meet the first power supply condition and the state parameters of the second battery are lower than the power supply requirements of the second load, the bidirectional DC-DC converter module is controlled to operate in a first mode, converting the output power of the first battery into the first power supply power and supplying it to the second load through the second power distribution module; or...

[0121] When the state parameters of the first battery meet the first power supply condition and the state parameters of the second battery are lower than the first preset parameter threshold, the bidirectional DC-DC converter module is controlled to be in the first working mode, converting the output power of the first battery into the third power supply power and providing it to charge the second battery.

[0122] In this embodiment, when the state parameters of the second battery are lower than the power supply requirements of the second load (i.e., the second battery's charge is insufficient to maintain the normal operation of the second load), if the state parameters of the first battery meet the first power supply condition, the bidirectional DC-DC converter module can be controlled to operate in a first mode. This allows the output power of the first battery to be converted and then supplied to the second load via the second power distribution module. Alternatively, the output power of the second battery and the output power of the first battery can be converted together and then supplied to the second load via the second power distribution module. Alternatively, when the state parameters of the second battery are lower than a first preset threshold (i.e., the second battery's charge is insufficient), if the state parameters of the first battery meet the first power supply condition, the bidirectional DC-DC converter module can be controlled to operate in a first mode. This allows the output power of the first battery to be converted and then used to charge the second battery, enabling the second battery to supply power to the second load. Thus, by supplying power to the second load from the first battery or the second battery itself, the normal operation of the second load can be maintained, improving vehicle driving safety.

[0123] In some embodiments, when the state parameters of the second battery satisfy the second power supply condition, the power supply control method may further include:

[0124] When the state parameters of the second battery meet the second power supply condition and the state parameters of the first battery are lower than the power supply requirements of the first load, the bidirectional DC-DC converter module is controlled to enter the second operating mode, converting the output power of the second battery into the second power supply power and providing it to the first load through the first power distribution module; or...

[0125] When the state parameters of the second battery meet the second power supply conditions and the state parameters of the first battery are lower than the second preset parameter threshold, the bidirectional DC-DC converter module is controlled to be in the second working mode, converting the output power of the second battery into the fourth power supply power and providing it to charge the first battery.

[0126] In this embodiment, when the state parameters of the first battery are lower than the power supply requirements of the first load (i.e., the first battery's charge is insufficient to maintain the normal operation of the first load), if the state parameters of the second battery meet the second power supply conditions, the bidirectional DC-DC converter module can be controlled to operate in a second mode. This allows the output power of the second battery to be converted and then supplied to the first load via the first power distribution module. Alternatively, the output power of both the first and second batteries can be converted and then supplied to the first load via the first power distribution module. Alternatively, when the state parameters of the first battery are lower than a second preset threshold (i.e., the first battery's charge is insufficient), if the state parameters of the second battery meet the second power supply conditions, the bidirectional DC-DC converter module can be controlled to operate in a second mode. This allows the output power of the second battery to be converted and then used to charge the first battery, enabling the first battery to supply power to the first load. Thus, by supplying power to the first load from the second battery or the first battery itself, the normal operation of the first load can be maintained, improving safety and vehicle driving safety.

[0127] Thus, in this embodiment of the application, the first battery and the second battery are used to charge each other, which can increase the driving range while using a lower cost; moreover, the dual battery redundancy backup can not only meet the needs of autonomous driving, but also avoid sudden power loss and improve the driving safety of the vehicle.

[0128] In this embodiment, the power supply system may further include a unidirectional DC-DC converter module connected between the second power distribution module and the second load. In some embodiments, the power supply control method further includes:

[0129] When the output voltage of the second power distribution module is inconsistent with the required voltage of the second load, the output voltage of the second power distribution module is converted into the target voltage through a unidirectional DC-DC converter module, and the target voltage is provided to the second load to supply power.

[0130] In this embodiment of the application, when the output voltage of the second power distribution module is inconsistent with the required voltage of the second load, the output voltage of the second power distribution module is converted into the target voltage and the target voltage is provided to the second load to supply power. This can maintain the normal operation of the second load and improve the driving safety of the vehicle.

[0131] In this embodiment, the power supply system may further include an AC converter module connected to the first battery. In some embodiments, the power supply control method may further include: when the AC converter module is connected to the AC charging device, performing AC-DC conversion on the output power of the AC charging device through the AC converter module to obtain a fifth power supply, and providing the fifth power supply to charge the first battery.

[0132] In this embodiment, the AC converter module can also convert the output power of the AC charging device and supply it to the second battery for charging, thereby increasing the capacity of the second battery and enabling the load to operate normally.

[0133] Thus, in this embodiment of the application, when the AC conversion module is connected to the AC charging device, the AC conversion module charges the first battery by converting the output power of the AC charging device from AC to DC, thereby increasing the capacity of the first battery and enabling the normal operation of the load.

[0134] This application provides a power supply control method that effectively increases the driving range by allowing the first battery and the second battery to charge each other, thus achieving a range extension effect. Simultaneously, the second battery replaces the original battery in the vehicle, thereby reducing costs. Furthermore, this method employs dual-battery redundancy backup, and a bidirectional DC-DC converter module allows the first battery to power a second load, or vice versa, thereby meeting the needs of autonomous driving and preventing sudden power outages, thus improving vehicle driving safety.

[0135] In yet another embodiment of this application, Figure 6 This is a schematic diagram of the composition structure of a battery system provided in an embodiment of this application. Figure 6 As shown, the battery system 60 may include the power supply system 10 as described in any of the foregoing embodiments.

[0136] In this embodiment of the application, the power supply system 10 can manage the power supply to the first battery and the second battery, thereby maintaining the normal operation of the first load and the second load.

[0137] This application provides a battery system that includes the aforementioned power supply system. By managing the power supply of the first battery and the second battery, the first battery can supply power to the second battery or the second load, or the second battery can supply power to the first battery or the first load. This effectively increases the driving range and eliminates the need for the original battery in the vehicle, thus reducing costs. Furthermore, the dual-battery redundancy backup in the battery system also prevents sudden power loss and increases safety.

[0138] In yet another embodiment of this application, Figure 7 This is a schematic diagram illustrating an application scenario of a battery system provided in an embodiment of this application. For example... Figure 7 As shown, this application scenario may include an AC charging device 401, a DC charging device 402, a power supply system 10, a motor drive module 708, a high-voltage load 709, and a low-voltage load 710. The power supply system may include a unidirectional AC-DC circuit 701, a high-voltage distribution box 702, a bidirectional DC-DC circuit 703, a low-voltage distribution box 704, a unidirectional DC-DC circuit 705, a power battery 706, and a low-voltage battery 707. The specific connection relationships of each module are as follows... Figure 7 As shown.

[0139] In this embodiment, the unidirectional AC-DC circuit 701 is the AC conversion module in the aforementioned embodiment, the high-voltage distribution box 702 is the first power distribution module in the aforementioned embodiment, the bidirectional DC-DC circuit 703 is the bidirectional DC conversion module in the aforementioned embodiment, the low-voltage distribution box 704 is the second power distribution module in the aforementioned embodiment, the unidirectional DC-DC circuit 705 is the unidirectional DC conversion module in the aforementioned embodiment, the power battery 706 is the first battery in the aforementioned embodiment, the low-voltage battery 707 is the second battery in the aforementioned embodiment, the high-voltage load 709 is the first load in the aforementioned embodiment, and the low-voltage load 710 is the second load in the aforementioned embodiment.

[0140] In this embodiment, the power battery and the low-voltage battery can be referred to as a battery module. The battery module can be in a composite form, meaning that the power battery 706 and the low-voltage battery 707 form a composite battery module. Here, "composite form" means that the power battery 706 and the low-voltage battery 707 form a system, and does not necessarily limit the power battery 706 and the low-voltage battery 707 to being physically in the same battery pack. In addition, the power supply system 10 can be integrated into the battery module, or it can be installed as a separate independent module on the vehicle where the battery module 601 is located.

[0141] In this embodiment of the application, when the state parameters of the power battery 706 meet the first power supply condition, the output power of the power battery 706 can be stepped down and converted by the bidirectional DC-DC circuit 703 to charge the low-voltage battery 707, or the output power of the power battery 706 can be stepped down and converted by the bidirectional DC-DC circuit 703 to supply power to the low-voltage load 710.

[0142] In this embodiment of the application, when the state parameters of the low-voltage battery 707 meet the power supply requirements of the low-voltage load 710, power can be supplied to the low-voltage load 710 through the low-voltage distribution box 704.

[0143] In this embodiment of the application, when the state parameters of the low-voltage load 710 meet the second power supply condition, the low-voltage battery 707 can be boosted and converted by the bidirectional DC-DC circuit 703 to charge the power battery 706, or the output power of the low-voltage battery 707 can be boosted and converted by the bidirectional DC-DC circuit 703 to supply power to the low-voltage load 710.

[0144] It is understood that, in some embodiments of this application, the low-voltage battery 707 can work together with the power battery 706 to supply power to the high-voltage load 709, or the power battery 706 can work together with the low-voltage battery 707 to supply power to the low-voltage load. Furthermore, the low-voltage battery 707 can also charge the power battery 706 and continue to supply power to the low-voltage load 710, or the power battery 706 can also charge the low-voltage battery 707 and continue to supply power to the high-voltage load 709.

[0145] In this embodiment of the application, it is assumed that the required voltage of the low-voltage load 710 is 12V, and the low-voltage battery 707 provides an output voltage of 48V. That is, the required voltage of the low-voltage load 710 is inconsistent with the output voltage of the low-voltage battery 707. At this time, the output voltage of the low-voltage battery 707 can be stepped down by the unidirectional DC-DC circuit 705 and then supplied to the low-voltage load 710.

[0146] In this embodiment, the motor drive module 708 is connected to the high-voltage distribution box 702 and the high-voltage load 709, and can convert the output power of the high-voltage distribution box 702 into mechanical energy, thereby driving the normal operation of the high-voltage load 709.

[0147] In this embodiment, the power battery 706 and the low-voltage battery 707 can be connected to an external charging device to charge them. Specifically, the power battery 706 can be connected to a DC charging device 402, or to an AC charging device 401 via a unidirectional AC-DC circuit 701, so that the power battery 706 can be charged by either the DC charging device 402 or the AC charging device 401. Furthermore, due to the internal structure of the power battery 706, the DC charging device 402 can bypass the power battery 706 to charge the low-voltage battery 707, and the AC charging device 401 can also charge the low-voltage battery 707.

[0148] This application provides a battery system, specifically a high-voltage electrical system for a vehicle. The specific implementation of the aforementioned embodiments has been described in detail through the above embodiments. It can be seen that when the power battery's charge is low, the low-voltage battery can supply power to the power battery, increasing the driving range and thus achieving a range extension effect. Furthermore, when the power battery fails, the low-voltage battery can be boosted by a converter (i.e., a bidirectional DC-DC circuit) to supply power to the vehicle, increasing safety. In addition, the use of dual-battery (power battery and low-voltage battery) redundancy provides a backup power source (i.e., the low-voltage battery) in emergency situations such as collisions, improving safety and eliminating the need for the vehicle's original battery, thus reducing costs.

[0149] In yet another embodiment of this application, Figure 8 This is a schematic diagram of the structural composition of a vehicle provided in an embodiment of this application. Figure 8 As shown, vehicle 80 may include battery system 60 as described in the foregoing embodiments.

[0150] In this embodiment, vehicle 80 can be a new energy vehicle, such as an electric vehicle or a plug-in hybrid electric vehicle; no specific limitation is made here. It should be noted that the battery in vehicle 80 can store electrical energy and stably supply this electrical energy to vehicle 80, ensuring the normal operation of vehicle 80.

[0151] This application provides a vehicle that includes the aforementioned battery system, in which a first battery and a second battery charge each other, thereby meeting the needs of autonomous driving and preventing sudden power loss, thus improving the vehicle's driving safety.

[0152] In another embodiment of this application, a computer-readable storage medium is provided, which stores a computer program that, when executed by at least one processor, implements any of the power supply control methods described in the foregoing embodiments.

[0153] In yet another embodiment of this application, a computer program product is also provided, including a computer program or instructions that, when executed by a processor, implement the power supply control method as described in any of the foregoing embodiments.

[0154] Those skilled in the art will understand that embodiments of this application can be provided as methods, apparatus, devices, or computer program products. Therefore, this application can take the form of hardware embodiments, software embodiments, or embodiments combining software and hardware aspects. Furthermore, this application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage) containing computer-usable program code.

[0155] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0156] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0157] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0158] It should be noted that, in this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, product, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, product, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, product, or apparatus that includes that element.

[0159] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0160] The methods disclosed in the several method embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments.

[0161] The features disclosed in the several product embodiments provided in this application can be arbitrarily combined without conflict to obtain new product embodiments.

[0162] The features disclosed in the several method or device embodiments provided in this application can be arbitrarily combined without conflict to obtain new method or device embodiments.

[0163] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A power supply system, characterized in that, The power supply system includes a first battery, a second battery, and a bidirectional DC-DC converter module; wherein: The first battery is connected to the first load, the second battery is connected to the second load, and the bidirectional DC-DC converter module is connected between the first battery and the second battery; The bidirectional DC-DC converter module is used to control the first battery to supply power to the first load when the state parameters of the first battery meet the first power supply condition, and to control the first battery and the second battery to jointly supply power to the second load; or to control the second battery to supply power to the second load when the state parameters of the second battery meet the second power supply condition, and to control the second battery and the first battery to jointly supply power to the first load. Wherein, the first power supply condition indicates that the state parameter of the first battery is higher than the power supply requirement parameter of the first load, and the second power supply condition indicates that the state parameter of the second battery is higher than the power supply requirement parameter of the second load.

2. The power supply system according to claim 1, characterized in that, The battery voltage corresponding to the first battery is higher than the battery voltage corresponding to the second battery.

3. The power supply system according to claim 1, characterized in that, The power supply system further includes a first power distribution module and a second power distribution module; wherein... The first power distribution module is connected between the first battery and the first load, and is used to control the first battery to supply power to the first load; The second power distribution module is connected between the second battery and the second load, and is used to control the second battery to supply power to the second load.

4. The power supply system according to claim 3, characterized in that, The bidirectional DC-DC converter module is configured to, when the state parameters of the first battery meet the first power supply condition and the state parameters of the second battery are lower than the power supply requirement parameters of the second load, control the bidirectional DC-DC converter module to be in a first operating mode, convert the output power of the first battery into a first power supply power, and provide it to the second load through the second power distribution module; or... The bidirectional DC-DC converter module is used to control the bidirectional DC-DC converter module to be in a second working mode when the state parameters of the second battery meet the second power supply conditions and the state parameters of the first battery are lower than the power supply demand parameters of the first load, so as to convert the output power of the second battery into a second power supply power and provide it to the first load through the first power distribution module.

5. The power supply system according to claim 3, characterized in that, The power supply system further includes a unidirectional DC-DC converter module, which is connected between the second power distribution module and the second load; wherein: The unidirectional DC-DC converter module is used to convert the output voltage of the second power distribution module into a target voltage when the output voltage of the second power distribution module is inconsistent with the required voltage of the second load, and to provide the target voltage to the second load.

6. The power supply system according to claim 1, characterized in that, The bidirectional DC-DC converter module is configured to control the bidirectional DC-DC converter module to operate in a first mode when the state parameters of the first battery meet a first power supply condition and the state parameters of the second battery are lower than a first preset parameter threshold, thereby converting the output power of the first battery into a third power supply and providing it to charge the second battery; or... The bidirectional DC-DC converter module is used to control the bidirectional DC-DC converter module to be in a second working mode when the state parameters of the second battery meet the second power supply conditions and the state parameters of the first battery are lower than the second preset parameter threshold, so as to convert the output power of the second battery into a fourth power supply and provide it to charge the first battery.

7. The power supply system according to any one of claims 1 to 6, characterized in that, The power supply system further includes an AC converter module, which is connected to the first battery; wherein: The AC conversion module is used to convert the output power of the AC charging device to DC power when connected to the AC charging device to obtain a fifth power supply, and to supply the fifth power supply to charge the first battery.

8. A battery system, characterized in that, The battery system includes the power supply system as described in any one of claims 1 to 7.

9. A vehicle, characterized in that, The vehicle includes the battery system as described in claim 8.

10. A power supply control method, characterized in that, The power supply control method, applied to any one of claims 1 to 7, comprises: When the state parameters of the first battery meet the first power supply condition, the bidirectional DC-DC converter module controls the first battery to supply power to the first load, and controls the first battery and the second battery to supply power to the second load together. When the state parameters of the second battery meet the second power supply conditions, the bidirectional DC-DC converter module controls the second battery to supply power to the second load, and controls the second battery and the first battery to supply power to the first load together; Wherein, the first power supply condition indicates that the state parameter of the first battery is higher than the power supply requirement parameter of the first load, and the second power supply condition indicates that the state parameter of the second battery is higher than the power supply requirement parameter of the second load.

11. The power supply control method according to claim 10, characterized in that, When the state parameters of the first battery meet the first power supply condition, the power supply control method further includes: When the state parameters of the first battery meet the first power supply condition and the state parameters of the second battery are lower than the power supply requirement parameters of the second load, the bidirectional DC-DC converter module is controlled to be in a first operating mode, converting the output power of the first battery into a first power supply power and providing it to the second load through the second power distribution module; or... When the state parameters of the first battery meet the first power supply condition and the state parameters of the second battery are lower than the first preset parameter threshold, the bidirectional DC-DC converter module is controlled to be in the first working mode, converting the output power of the first battery into the third power supply and providing it to charge the second battery.

12. The power supply control method according to claim 10, characterized in that, When the state parameters of the second battery meet the second power supply condition, the power supply control method further includes: When the state parameters of the second battery meet the second power supply condition and the state parameters of the first battery are lower than the power supply requirements of the first load, the bidirectional DC-DC converter is controlled to be in a second operating mode, converting the output power of the second battery into a second power supply power and providing it to the first load through the first power distribution module; or... When the state parameters of the second battery meet the second power supply condition and the state parameters of the first battery are lower than the second preset parameter threshold, the bidirectional DC-DC converter module is controlled to be in the second working mode, converting the output power of the second battery into the fourth power supply power and providing it to charge the first battery.

13. The power supply control method according to claim 10, characterized in that, The power supply control method further includes: When the output voltage of the second power distribution module is inconsistent with the required voltage of the second load, the output voltage of the second power distribution module is converted into the target voltage through a unidirectional DC-DC converter module, and the target voltage is provided to the second load to supply power.

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