Low-voltage power supply system and wide-body vehicle

Abstract

The utility model provides a low-voltage power supply system and a wide-body vehicle. The low-voltage power supply system comprises a control module, a first battery pack and a second battery pack. The control module is connected with the power battery, the first load module and the second load module, the control module is used for outputting first low-voltage electricity to the first load module based on the high-voltage electricity of the power battery, and the control module is further used for outputting second low-voltage electricity to the second load module based on the high-voltage electricity of the power battery; the first battery pack is connected with the control module and the first load module, and the first battery pack is used for receiving first low-voltage electricity from the control module; the second battery pack is connected with the control module and the second load module. The second battery pack is used for receiving the second low-voltage power from the control module. The low-voltage power supply system is provided with two groups of battery packs to share the power of the whole vehicle so as to buffer the starting current, so that all equipment of the wide-body vehicle can still operate normally during the starting period, and the operation reliability of the whole wide-body vehicle is ensured.

Description

Technical Field

[0001] This application relates to the field of engineering machinery technology, and more specifically, to a low-voltage power supply system and a wide-body vehicle. Background Technology

[0002] Wide-body vehicles have a larger body width and interior space, resulting in higher cargo capacity and transportation efficiency. They are widely used in various engineering fields. To achieve electrification, wide-body vehicles are electric vehicles, meaning they are equipped with drive motors and power batteries to replace the engines and fuel tanks of traditional wide-body vehicles.

[0003] However, high-power low-voltage devices (such as drive motors) in wide-body vehicles typically require very large instantaneous currents during startup. This large instantaneous current can cause a sharp drop in power supply voltage, which in turn affects the normal operation of other equipment in the wide-body vehicle. Utility Model Content

[0004] To address the aforementioned issues, this application provides a low-voltage power supply system and a wide-body vehicle, aiming to solve the problem that the instantaneous high current of high-power low-voltage devices during startup in a wide-body vehicle can cause a sharp drop in power supply voltage, thereby affecting the normal operation of other equipment in the wide-body vehicle.

[0005] In a first aspect, this application provides a low-voltage power supply system applied to a wide-body vehicle. The wide-body vehicle includes a power battery, a first load module, and a second load module. The low-voltage power supply system includes a control module, a first battery pack, and a second battery pack. The control module is connected to the power battery, the first load module, and the second load module. The control module is used to output a first low-voltage power from the high-voltage power of the power battery to the first load module. The control module is also used to output a second low-voltage power from the high-voltage power of the power battery to the second load module. The first battery pack is connected to the control module and the first load module. The first battery pack is used to receive the first low-voltage power from the control module. The second battery pack is connected to the control module and the second load module. The second battery pack is used to receive the second low-voltage power from the control module.

[0006] Based on the low-voltage power supply system provided in this application embodiment, the first battery pack and the second battery pack can provide a larger total capacity and lower internal resistance. Furthermore, they can share the vehicle's power, enabling them to more effectively handle instantaneous high current demands. When high-power low-voltage devices (such as motors) in the wide-body vehicle generate very large instantaneous currents during startup, the first and second battery packs can each share a portion of the startup current, thus buffering the current and preventing a sharp drop in power supply voltage caused by the large instantaneous current of the high-power low-voltage devices during startup, which could affect the normal operation of other equipment in the wide-body vehicle. This also avoids line overload and improves safety. By using two battery packs (i.e., the first and second battery packs) to buffer the startup current, this application ensures that all equipment in the wide-body vehicle can still operate normally during startup, thereby guaranteeing the overall operational reliability of the wide-body vehicle.

[0007] In one possible design, the control module includes a main control unit, a first conversion unit, and a second conversion unit; the main control unit is connected to the power battery; the first conversion unit is connected to the main control unit, a first load module, and a first battery pack, and is used to convert the high-voltage electricity from the power battery into a first low-voltage electricity for output to the first load module and the first battery pack; the second conversion unit is connected to the main control unit, a second load module, and a second battery pack; the second conversion unit is used to convert the high-voltage electricity from the power battery into a second low-voltage electricity for output to the second load module and the second battery pack.

[0008] In the above technical solution, the first conversion unit can provide a stable and reliable first low-voltage power supply to the first battery pack and the first load module, and the second conversion unit can provide a stable and reliable second low-voltage power supply to the second battery pack and the second load module, thereby ensuring the reliability of power supply to the first battery pack, the first load module, the second battery pack, and the second load module. Secondly, when the starting current of the wide-body vehicle is too high, the first and second conversion units can work in conjunction with the first and second battery packs to share the overall vehicle power, enabling them to more effectively cope with instantaneous high current demands. When high-power low-voltage devices in the wide-body vehicle generate very large instantaneous currents during startup, the first and second battery packs, the first and second conversion units can each share a portion of the starting current, thus buffering the current and preventing a sharp drop in power supply voltage caused by the large instantaneous current of the high-power low-voltage devices during startup, which could affect the normal operation of other equipment in the wide-body vehicle. This application uses two sets of batteries (i.e., the first battery pack and the second battery pack) and two sets of conversion units (i.e., the first conversion unit and the second conversion unit) to buffer the starting current, which can ensure that all equipment of the wide-body vehicle can still operate normally during the start-up period, thereby ensuring the overall operational reliability of the wide-body vehicle.

[0009] In one possible design, the low-voltage power supply system also includes a first fuse box, the input of which is connected to the first conversion unit and the first battery pack, and the output of which is connected to the first load module.

[0010] In the above technical solution, when the wide-body vehicle is in the ON position, the first battery pack provides low-voltage electricity to the water pump, chassis and fan in the first load module through the first fuse box to further improve the power supply reliability. Secondly, the first fuse box can effectively protect downstream sensitive electronic equipment and avoid equipment damage or performance degradation due to excessive current surges.

[0011] In one possible design, the wide-body vehicle also includes an electric retardation system; the low-voltage power supply system also includes a first fuse, one end of which is connected to the input terminal of the first fuse box, the first conversion unit and the first battery pack, and the other end of which is connected to the electric retardation system.

[0012] In the above technical solution, when the wide-body vehicle is heavily loaded and going downhill, the electric slow-down system is activated. At this time, the whole vehicle is in a high-voltage state, and the first conversion unit provides low-voltage electricity to the electric slow-down system. This will not affect the low voltage of the whole vehicle. In addition, the first fuse can prevent the first conversion unit from breaking the circuit with the electric slow-down system, thereby ensuring the reliability of the power supply provided by the first conversion unit to the electric slow-down system.

[0013] In one possible design, the low-voltage power supply system also includes a second fuse box, the input of which is connected to the second conversion unit and the second battery pack, and the output of which is connected to the second load module.

[0014] In the above technical solution, when the wide-body vehicle is in the ON position, the second battery pack provides low-voltage electricity to the cooling fan, condenser fan and water-cooled unit in the second load module through the second fuse box, so as to further improve the power supply reliability. Secondly, the second fuse box can effectively protect the downstream sensitive electronic equipment and avoid equipment damage or performance degradation due to excessive current surge.

[0015] In one possible design, the wide-body vehicle also includes an emergency steering system; the low-voltage power supply system includes a second fuse, one end of which is connected to the input terminal of the second fuse box, the second conversion unit, and the second battery pack, and the other end of which is connected to the emergency steering system.

[0016] Secondly, this application provides a wide-body vehicle, including a power battery, a low-voltage power supply system as described in any optional manner of the first aspect, a first load module, and a second load module; the low-voltage power supply system is connected to the power battery; the first load module is connected to the low-voltage power supply system; and the second load module is connected to the low-voltage power supply system.

[0017] In one possible design, the first load module includes at least a water pump, a chassis, and a fan.

[0018] In one possible design, the second load module includes at least a cooling fan, a condenser fan, and a water-cooled unit.

[0019] In one possible design, the wide-body vehicle also includes an electric retardation system and an emergency steering system; the electric retardation system is connected to a low-voltage power supply system; the emergency steering system is also connected to a low-voltage power supply system. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the modular structure of a wide-body vehicle provided in an embodiment of this application;

[0021] Figure 2 This is a schematic diagram of the modular structure of another wide-body vehicle provided in an embodiment of this application;

[0022] Figure 3 This is a schematic diagram of the modular structure of another wide-body vehicle provided in an embodiment of this application;

[0023] Figure 4 This is a schematic diagram of the modular structure of another wide-body vehicle provided in an embodiment of this application;

[0024] Figure 5 This is a schematic diagram of the modular structure of another wide-body vehicle provided in an embodiment of this application;

[0025] Figure 6 This is a schematic diagram of the modular structure of another wide-body vehicle provided in the embodiments of this application.

[0026] The following are the labeling elements in the figure:

[0027] 1. Wide-body vehicle; 11. Power battery; 12. Low-voltage power supply system; 121. Control module; 1211. Main control unit; 1212. First conversion unit; 1213. Second conversion unit; 122. First battery pack; 123. Second battery pack; 124. First fuse box; 125. First fuse; 126. Second fuse box; 127. Second fuse; 13. First load module; 131. Water pump; 132. Chassis; 133. Fan; 14. Second load module; 141. Cooling fan; 142. Condenser fan; 143. Water-cooled unit; 15. Electric slow-motion system; 16. Emergency steering system. Detailed Implementation

[0028] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, and circuits have been omitted so as not to obscure the description of this application with unnecessary detail.

[0029] With the rapid development of new energy sources, more and more equipment is moving towards the "dual carbon" goals of "carbon peaking" and "carbon neutrality." Taking engineering equipment as an example, fuel-powered excavators, loaders, and wide-body trucks powered by engine oil have higher manufacturing and maintenance costs, while electric excavators, loaders, and wide-body trucks powered by batteries have lower costs. Wide-body trucks, with their larger body width and interior space, offer higher cargo capacity and transportation efficiency, making them widely used in various fields. To enable the electrification of wide-body trucks, they are typically equipped with drive motors and power batteries to replace the traditional engines and fuel tanks.

[0030] Currently, wide-body vehicles in related technologies typically use a battery and a DC-DC converter connected in parallel to power the vehicle's low-voltage electrical system. This means the DC-DC converter connects to the power battery, converts the high-voltage electricity provided by the converter into low-voltage electricity, and outputs it to the battery and the vehicle's low-voltage electrical system. In other words, the low-voltage electrical system and corresponding control modules in a wide-body vehicle share a single power supply. However, high-power low-voltage devices in wide-body vehicles (such as drive motors) often require a very large instantaneous current during startup. This large instantaneous current causes a sharp drop in power supply voltage, meaning that the startup of high-power low-voltage electrical appliances can lower the overall vehicle voltage. This may affect the normal operation of other electronic devices (such as instrument panels, navigation systems, lighting, etc.) and high-power equipment (high-power cooling systems, high-power heaters, etc.) within the wide-body vehicle, and may even cause these devices to temporarily malfunction or restart. Furthermore, a system based on 24V requires more current to transmit current, which may lead to energy loss and circuit overload, posing certain safety hazards.

[0031] This application provides a low-voltage power supply system and a wide-body vehicle. The low-voltage power supply system is equipped with two sets of battery packs to distribute the power of the entire vehicle and buffer the starting current, thereby ensuring that all equipment of the wide-body vehicle can still operate normally during startup, so as to ensure the overall operational reliability of the wide-body vehicle.

[0032] The low-voltage power supply system and wide-body vehicle provided in this application are described below with reference to the accompanying drawings.

[0033] like Figure 1As shown, this application embodiment provides a wide-body vehicle 1, which includes a power battery 11, a low-voltage power supply system 12, a first load module 13, and a second load module 14. The low-voltage power supply system 12 is connected to the power battery 11, the first load module 13, and the second load module 14. The first load module 13 and the second load module 14 are both low-voltage loads. The low-voltage power supply system 12 can convert the high-voltage electricity output from the power battery 11 into low-voltage electricity and output it to the first load module 13 and the second load module 14 respectively to ensure power supply reliability, thereby ensuring the working reliability of the first load module 13 and the second load module 14 based on the low-voltage electricity.

[0034] In one example, such as Figure 2 As shown, the first load module 13 provided in this application includes at least a water pump 131, a chassis 132, and a fan 133. The main function of the water pump 131 is to drive the coolant to circulate between the engine and radiator to maintain the engine's operating temperature within a safe range. Through effective heat dissipation, the water pump can prevent engine overheating, thereby reducing component wear and extending engine life. The chassis 132 supports the wide-body vehicle's body, engine, transmission system, etc., and connects these components together. Specifically, the chassis 132 may include a frame, suspension system, steering system, and braking system. The fan 133 is an Automatic Temperature Sensing (ATS) fan. The ATS fan automatically adjusts its speed according to changes in engine temperature to achieve precise cooling. Furthermore, the ATS fan can reduce unnecessary energy consumption and improve fuel economy while ensuring effective cooling. The water pump 131, chassis 132, and fan 133 are key components in the wide-body vehicle 1; these components are crucial for the vehicle's basic operation and safety. For example, water pump 131 is responsible for cooling system circulation, fan 133 ensures the engine operates at the appropriate temperature, and chassis 132 supports the entire vehicle structure and affects driving performance. In the event of limited power supply or emergency, the normal operation of these components must be prioritized to ensure the reliability of the wide-body vehicle 1.

[0035] Optionally, the first load module 13 may also include cab electrical components corresponding to the wide-body vehicle.

[0036] In one example, such as Figure 2As shown, the second load module 14 provided in this application includes at least a cooling fan 141, a condenser fan 142, and a water-cooled unit 143. The main task of the cooling fan 141 is to accelerate airflow through forced convection to help dissipate heat from the engine and its related components. The condenser fan 142 is mainly used in the condenser section of the air conditioning system to help the condenser cool the refrigerant from a gaseous state to a liquid state, thereby completing the refrigeration cycle. The water-cooled unit 143 is a high-efficiency cooling system used to circulate coolant to remove the heat generated by the engine. Although the components such as the cooling fan 141, condenser fan 142, and water-cooled unit 143 also have an important impact on the vehicle's performance, they are more auxiliary, mainly used to enhance the cooling effect and environmental adaptability. In situations of limited power supply or emergencies, it is not necessary to prioritize the normal operation of these components.

[0037] In order to enable the low-voltage power supply system 12 provided in this application to reliably supply power to the first load module 13 and the second load module 14, in one example, such as Figure 3 As shown, the low-voltage power supply system 12 includes a control module 121, a first battery pack 122, and a second battery pack 123. The control module 121 is connected to the power battery 11, the first load module 13, and the second load module 14. The control module 121 is used to output a first low-voltage power from the high-voltage power of the power battery 11 to the first load module 13, and the control module 121 is also used to output a second low-voltage power from the high-voltage power of the power battery 11 to the second load module 14. The first battery pack 122 is connected to the control module 121 and the first load module 13, and the first battery pack 122 is used to receive the first low-voltage power from the control module 121. The second battery pack 123 is connected to the control module 121 and the second load module 14, and the second battery pack 123 is used to receive the second low-voltage power from the control module 121.

[0038] In this example, when the wide-body vehicle needs to be started, the operator can turn it to the ON position using the key switch. At this time, the wide-body vehicle is in the ON position (start position). The first battery pack 122 and the second battery pack 123 provide low-voltage power to the vehicle. The first battery pack 122 outputs low voltage to the first load module 13, and the second battery pack 123 outputs low voltage to the second load module 14. This ensures reliable power supply to the first load module 13 and the second load module 14 when the wide-body vehicle is in the ON position, thus guaranteeing the operational reliability of the first load module 13 and the second load module 14. When the wide-body vehicle is powered by high voltage (provided by the power battery 11), the control module 121 converts the high-voltage power from the power battery 11 into a first low-voltage power and a second low-voltage power. The first low-voltage power supplies the first battery pack 122 and the first load module 13, and the second low-voltage power supplies the second battery pack 123 and the second load module 14.

[0039] Thus, the first battery pack 122 and the second battery pack 123 can provide a larger total capacity and lower internal resistance, and they can share the vehicle's power, enabling them to more effectively cope with instantaneous high current demands. When high-power low-voltage devices (such as electric motors) in the wide-body vehicle generate very large instantaneous currents during startup, the first battery pack 122 and the second battery pack 123 can each share a portion of the startup current, thus buffering the current and preventing a sharp drop in power supply voltage caused by the large instantaneous current of high-power low-voltage devices during startup, which could affect the normal operation of other equipment in the wide-body vehicle. This also avoids circuit overload and improves safety. By using two battery packs (i.e., the first battery pack 122 and the second battery pack 123) to buffer the startup current, this application ensures that all equipment in the wide-body vehicle 1 can still operate normally during startup, thereby guaranteeing the overall operational reliability of the wide-body vehicle.

[0040] In one example, such as Figure 4 As shown, the control module 121 includes a main control unit 1211, a first conversion unit 1212, and a second conversion unit 1213. The main control unit 1211 is connected to the power battery 11. The first conversion unit 1212 is connected to the main control unit 1211, the first load module 13, and the first battery pack 122. The first conversion unit 1212 is used to convert the high-voltage electricity from the power battery 11 into a first low-voltage electricity and output it to the first load module 13 and the first battery pack 122. The second conversion unit 1213 is connected to the main control unit 1211, the second load module 14, and the second battery pack 123. The second conversion unit 1213 is used to convert the high-voltage electricity from the power battery 11 into a second low-voltage electricity and output it to the second load module 14 and the second battery pack 123.

[0041] In this example, the first conversion unit 1212 outputs a first low-voltage power to the first load module 13 and the first battery pack 122. The first conversion unit 1212 can stabilize the first low-voltage power within the required output voltage range. That is, during startup, the first conversion unit 1212 can monitor and adjust the output first low-voltage power to ensure it remains at a stable level, thereby providing a stable and reliable first low voltage to the first load module 13 and the first battery pack 122. The second conversion unit 1213 outputs a second low-voltage power to the second load module 14 and the second battery pack 123. The second conversion unit 1213 can stabilize the second low-voltage power within the required output voltage range. That is, during startup, the second conversion unit 1213 can monitor and adjust the output second low-voltage power to ensure it remains at a stable level, thereby providing a stable and reliable second low voltage to the second load module 14 and the second battery pack 123.

[0042] Secondly, when the starting current of the wide-body vehicle is too high, the first conversion unit 1212 and the second conversion unit 1213 can work in conjunction with the first battery pack 122 and the second battery pack 123 to share the overall vehicle power, enabling them to more effectively cope with instantaneous high current demands. When high-power low-voltage devices in the wide-body vehicle generate very large instantaneous currents during startup, the first battery pack 122, the second battery pack 123, the first conversion unit 1212, and the second conversion unit 1213 can each share a portion of the starting current, thus buffering the current and preventing the high-power low-voltage devices in the wide-body vehicle from experiencing a sharp drop in power supply voltage during startup, which could affect the normal operation of other equipment in the wide-body vehicle. This application, through two sets of batteries (i.e., the first battery pack 122 and the second battery pack 123) and two sets of conversion units (i.e., the first conversion unit 1212 and the second conversion unit 1213), can ensure that all equipment in the wide-body vehicle can still operate normally during startup by buffering the starting current, thereby guaranteeing the overall operational reliability of the wide-body vehicle.

[0043] Optionally, the first conversion unit 1212 and the second conversion unit 1213 can be DC-DC converters. These converters can dynamically adjust the output voltage according to the needs of the first load module 13 and the second load module 14, ensuring power is distributed on demand and avoiding unnecessary energy waste. The DC-DC converters have a voltage regulation function, maintaining output voltage stability even when the high-voltage power supplied by the power battery 11 fluctuates, thereby protecting sensitive electronic equipment from voltage fluctuations. Optionally, the first conversion unit 1212 can be a DC-DC converter built into the main control unit 1211, and the second conversion unit 1213 can be a DC-DC converter external to the main control unit 1211. This application does not impose specific limitations on this.

[0044] In one example, such as Figure 5 As shown, the low-voltage power supply system 12 also includes a first fuse box 124. The input terminal of the first fuse box 124 is connected to the first conversion unit 1212 and the first battery pack 122, and the output terminal of the first fuse box 124 is connected to the first load module 13. In this example, when the wide-body vehicle is in the ON position, the first battery pack 122 provides low-voltage power to the water pump 131, chassis 132, and fan 133 in the first load module 13 via the first fuse box 124, thereby further improving the reliability of power supply. Secondly, the first fuse box 124 can effectively protect downstream sensitive electronic equipment, avoiding equipment damage or performance degradation due to excessive current surges.

[0045] In one example, such as Figure 5As shown, the wide-body vehicle 1 also includes an electric retarder system 15. The electric retarder system is mainly used to assist the wide-body vehicle 1 in deceleration and braking, especially in situations involving prolonged downhill driving or frequent deceleration. It generates braking force through an electric motor or electromagnetic induction, thereby reducing the burden on the traditional mechanical braking system. In this example, the low-voltage power supply system 12 also includes a first fuse 125. One end of the first fuse 125 is connected to the input terminal of the first fuse box 124, the first conversion unit 1212, and the first battery pack 122, while the other end of the first fuse 125 is connected to the electric retarder system 15. In this example, when the wide-body vehicle 1 is heavily loaded and going downhill, the electric slowing system 15 is activated. At this time, the whole vehicle is in a high-voltage state, and the first conversion unit 1212 provides low-voltage electricity to the electric slowing system 15. This will not affect the low voltage of the whole vehicle. Furthermore, the first fuse 125 can prevent the first conversion unit 1212 from breaking the circuit with the electric slowing system 15, thereby ensuring the reliability of the power supply provided by the first conversion unit 1212 to the electric slowing system 15.

[0046] In one example, such as Figure 5 As shown, the low-voltage power supply system 12 also includes a second fuse box 126. The input terminal of the second fuse box 126 is connected to the second conversion unit 1213 and the second battery pack 123, and the output terminal of the second fuse box 126 is connected to the second load module 14. In this example, when the wide-body vehicle is in the ON position, the second battery pack 123 provides low-voltage power to the cooling fan 141, condenser fan 142, and water-cooled unit 143 in the second load module 14 via the second fuse box 126, thereby further improving the reliability of power supply. Secondly, the second fuse box 126 can effectively protect downstream sensitive electronic equipment, avoiding equipment damage or performance degradation due to excessive current surges.

[0047] In one example, such as Figure 5 As shown, the wide-body vehicle 1 also includes an emergency steering system 16. This emergency steering system provides backup steering capability when the main steering system of the wide-body vehicle 1 fails or malfunctions, ensuring the vehicle can still be effectively controlled and preventing accidents. In this example, when the wide-body vehicle 1 starts to turn, the first battery pack 122, the second battery pack 123, the first conversion unit 1212, and the second conversion unit 1213 buffer the starting current, thereby preventing the vehicle voltage from being pulled down and improving the overall vehicle operational reliability.

[0048] In this example, the low-voltage power supply system 12 also includes a second fuse 127. One end of the second fuse 127 is connected to the input terminal of the second fuse box 126, the second conversion unit 1213, and the second battery pack 123, and the other end of the second fuse 127 is connected to the emergency steering system 16. The second fuse 127 prevents a break in the circuit between the second conversion unit 1213 and the emergency steering system 16, thereby ensuring the reliability of the power supply provided by the second conversion unit 1213 to the emergency steering system 16.

[0049] Optional, such as Figure 6 As shown, the first battery pack 122 provided in this application may include two batteries connected in series, and the second battery pack 123 may include two batteries connected in series. The batteries selected have larger capacity and starting current to further improve the buffering effect of the starting current. The specific capacity and starting current of the batteries can be selected according to actual needs. This application does not impose specific restrictions on this.

[0050] In summary, the first battery pack 122 and the second battery pack 123 can provide a larger total capacity and lower internal resistance. Furthermore, they can share the vehicle's power, enabling them to more effectively handle instantaneous high current demands. When high-power low-voltage devices (such as electric motors) in the wide-body vehicle generate very large instantaneous currents during startup, the first battery pack 122 and the second battery pack 123 can each share a portion of the starting current, thus buffering the current and preventing a sharp drop in power supply voltage caused by the large instantaneous current of the high-power low-voltage devices during startup, which could affect the normal operation of other equipment in the wide-body vehicle. This also avoids circuit overload and improves safety. By using two battery packs (i.e., the first battery pack 122 and the second battery pack 123) to buffer the starting current, this application ensures that all equipment in the wide-body vehicle 1 can still operate normally during startup, thereby guaranteeing the overall operational reliability of the wide-body vehicle.

[0051] Secondly, a second aspect of this application also proposes a wide-body vehicle 1, including the low-voltage power supply system 12 described in any of the above embodiments. The wide-body vehicle 1 provided in this application, having the low-voltage power supply system 12 described in the above embodiments, possesses all the beneficial effects of the low-voltage power supply system 12. The low-voltage power supply system 12 has been described in detail above and will not be repeated here.

[0052] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.

[0053] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0054] Furthermore, in the description of this application and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0055] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0056] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A low-voltage power supply system, characterized in that, Applied to wide-body vehicles, the wide-body vehicles include a power battery, a first load module and a second load module; The low-voltage power supply system includes: A control module is connected to the power battery, the first load module, and the second load module. The control module is used to output a first low voltage power to the first load module based on the high voltage power of the power battery. The control module is also used to output a second low voltage power to the second load module based on the high voltage power of the power battery. A first battery pack, connected to the control module and the first load module, the first battery pack being used to receive the first low-voltage power from the control module; and, The second battery pack is connected to the control module and the second load module, and the second battery pack is used to receive the second low-voltage power from the control module.

2. The low-voltage power supply system according to claim 1, characterized in that, The control module includes: The main control unit is connected to the power battery; A first conversion unit, connected to the main control unit, the first load module, and the first battery pack, is used to convert the high-voltage electricity from the power battery into a low-voltage electricity output to the first load module and the first battery pack; and... The second conversion unit is connected to the main control unit, the second load module, and the second battery pack; the second conversion unit is used to convert the high voltage of the power battery into the second low voltage and output it to the second load module and the second battery pack.

3. The low-voltage power supply system according to claim 2, characterized in that, The low-voltage power supply system also includes: The first fuse box has its input terminal connected to the first conversion unit and the first battery pack, and its output terminal connected to the first load module.

4. The low-voltage power supply system according to claim 3, characterized in that, The wide-body vehicle also includes an electric retardation system; the low-voltage power supply system also includes: The first fuse has one end connected to the input terminal of the first fuse box, the first conversion unit, and the first battery pack, and the other end connected to the electric slow-down system.

5. The low-voltage power supply system according to claim 2, characterized in that, The low-voltage power supply system also includes: The second fuse box has its input terminal connected to the second conversion unit and the second battery pack, and its output terminal connected to the second load module.

6. The low-voltage power supply system according to claim 5, characterized in that, The wide-body vehicle also includes an emergency steering system; the low-voltage power supply system also includes: The second fuse has one end connected to the input terminal of the second fuse box, the second conversion unit, and the second battery pack, and the other end connected to the emergency steering system.

7. A wide-body vehicle, characterized in that, include: Power battery; The low-voltage power supply system as described in any one of claims 1-6 is connected to the power battery; A first load module is connected to the low-voltage power supply system; as well as, The second load module is connected to the low-voltage power supply system.

8. The wide-body vehicle according to claim 7, characterized in that, The first load module includes at least a water pump, a chassis, and a fan.

9. The wide-body vehicle according to claim 7, characterized in that, The second load module includes at least a cooling fan, a condenser fan, and a water-cooled unit.

10. The wide-body vehicle according to claim 7, characterized in that, The wide-body vehicle also includes: An electric retardation system connected to the low-voltage power supply system; and an emergency steering system connected to the low-voltage power supply system.

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