Low-voltage power supply system and vehicle

Abstract

The utility model relates to the technical field of automobiles, in particular to a low-voltage power supply system and a vehicle. The low-voltage power supply system is applied to a vehicle body, the vehicle body comprises a chassis, a front cabin and a passenger compartment, the chassis is provided with a front area corresponding to the front cabin, a middle area corresponding to the passenger compartment and a rear area far away from the front area, and the low-voltage power supply system comprises a first power supply system. The first power supply system comprises a DCDC converter and a main distribution box, and the DCDC converter is arranged in the rear area of the chassis; the main distribution box is arranged in the rear area of the chassis, and the DCDC converter is electrically connected to the main distribution box and supplies power to a vehicle-mounted low-voltage load through the main distribution box. The technical problem that the same vehicle body is difficult to be compatible with low-voltage power supply systems matched with different vehicle types is solved.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of automobiles, and in particular to a low-voltage power supply system and a vehicle. BACKGROUND

[0002] With the rapid development of electric vehicles and intelligent driving technology, the power supply system of the whole vehicle becomes more and more complex and important. The power supply system not only needs to support more and more vehicle configurations, but also must meet strict functional safety requirements, especially when the automatic driving technology reaches L3 level, the vehicle needs to handle the driving task on its own under certain conditions, which puts higher requirements on the safety of the vehicle. Automotive Safety Integrity Level (ASIL) is an important standard for automotive functional safety, and ASIL-D is the highest safety level, which means that system failure may cause serious consequences, so the highest level of safety measures is required.

[0003] For vehicle models with intelligent driving L3 and steer-by-wire and brake functions, vehicle models with intelligent driving L3 and traditional steer-by-wire and brake functions, and conventional intelligent driving or non-intelligent driving vehicle models, the above three types of vehicles are different, and the low-voltage power supply system of different vehicles usually needs to be adjusted according to specific needs, which may involve redesign of the power supply architecture, changes in vehicle layout, and significant adjustments to the vehicle structure, making it difficult to effectively compatible, resulting in an increase in production design costs.

[0004] Therefore, it is urgent to solve the problem of the low-voltage power supply system that is difficult to compatible with different vehicle models on the same vehicle body, resulting in an increase in vehicle design costs and production complexity. CONTENT OF THE INVENTION

[0005] In view of this, embodiments of the present application provide a low-voltage power supply system and a vehicle to solve the technical problem of the low-voltage power supply system that is difficult to compatible with different vehicle models on the same vehicle body, so as to reduce the complexity of vehicle design costs and production.

[0006] In order to achieve the above purpose, the technical scheme of the embodiments of the present application is as follows:

[0007] In a first aspect, the embodiments of the present application provide a low-voltage power supply system applied to a vehicle body, the vehicle body comprising a chassis, a front engine compartment and a passenger compartment, the chassis having a front region corresponding to the front engine compartment, a middle region corresponding to the passenger compartment, and a rear region away from the front region, the low-voltage power supply system comprising a first power supply system, the first power supply system comprising:

[0008] a DCDC converter, the DCDC converter being arranged in the rear region of the chassis;

[0009] A main distribution box is arranged in the rear area of the chassis, the DCDC converter is electrically connected to the main distribution box and supplies power to the low-voltage load on the vehicle through the main distribution box.

[0010] The low-voltage power supply system provided by the application improves the versatility of the vehicle body by arranging the DCDC converter in the rear area of the chassis and arranging the main distribution box in the rear area of the chassis. The vehicle bodies of different vehicle models such as the vehicle model with L3 intelligent driving and the steer-by-wire and brake-by-wire function, the vehicle model with L3 intelligent driving and the traditional steer-by-wire and brake-by-wire function, and the conventional intelligent driving or non-intelligent driving vehicle model can be universal, facilitating the arrangement of different low-voltage power supply systems. When the production is switched between different vehicle models, the adjustment requirement of the low-voltage power supply system is minimized, the complexity in the design and production process is reduced, and the cost is reduced.

[0011] In a possible implementation, the first power supply system further includes a main battery arranged in the front engine compartment, the main battery is electrically connected to the main distribution box and supplies power to the low-voltage load on the vehicle through the main distribution box.

[0012] In a possible implementation, the low-voltage power supply system further includes a second power supply system, the second power supply system includes:

[0013] A first redundant distribution box is arranged in parallel with the main distribution box between the main battery and the low-voltage load on the vehicle, and the first redundant distribution box is arranged in the front engine compartment.

[0014] In a possible implementation, the low-voltage power supply system further includes a first cut-off switch, the first cut-off switch has a first port and a second port, the first port is electrically connected to the DCDC converter, the second port is electrically connected to the main battery, and the first cut-off switch is arranged close to the main battery in the front engine compartment.

[0015] In a possible implementation, the low-voltage power supply system further includes a third power supply system, the third power supply system includes:

[0016] A second redundant distribution box is arranged in parallel with the main distribution box between the main battery and the low-voltage load on the vehicle, and the second redundant distribution box is arranged in the front engine compartment.

[0017] A redundant battery is connected in series between the second redundant distribution box and the main battery, and the redundant battery is arranged in the passenger compartment.

[0018] In a possible implementation, the low-voltage power supply system further includes a second cut-off switch, which is connected in series between the main battery and the redundant battery, and is arranged in the front cabin close to the main battery.

[0019] In a possible implementation, the DCDC converter and the main power distribution box are arranged in the rear part in the width direction of the vehicle body and are spaced apart from each other.

[0020] In a possible implementation, the main battery and the second redundant power distribution box are arranged in the front cabin in the width direction of the vehicle body and are spaced apart from each other.

[0021] In a possible implementation, the low-voltage load includes at least one of a steering unit, a braking unit, an intelligent driving unit, and a domain control unit.

[0022] In a second aspect, an embodiment of the present application provides a vehicle, including:

[0023] a vehicle body; and the low-voltage power supply system.

[0024] The low-voltage power supply system and the vehicle provided by the present application solve the problem that the structure of the same vehicle body is difficult to adapt to low-voltage power supply systems of different vehicle models, and the problem of poor universality of the vehicle body, so that the same vehicle body can adapt to different configuration requirements without the need to redesign the vehicle body.

[0025] The low-voltage power supply system and the vehicle provided by the present application can be compatible with low-voltage power supply system configurations of different vehicle models, have good compatibility, do not need to adjust the arrangement scheme of the low-voltage power supply system for different configuration vehicle models, can completely adapt to different configuration requirements, do not need to re-arrange the low-voltage power supply system, and reduce costs.

[0026] The low-voltage power supply system and the vehicle provided by the present application only need to add or remove elements of the low-voltage power supply system according to different configuration types for the structure of the same vehicle body, do not need to change the vehicle body structure, thereby avoiding the problem that different configuration vehicle models need to re-adjust the overall vehicle arrangement. DETAILED DESCRIPTION

[0027] Figure 1 FIG. 1 is a schematic diagram of a vehicle body chassis and wheels provided by an embodiment of the present application;

[0028] Figure 2 FIG. 2 is a schematic diagram of a low-voltage power supply system provided by an embodiment of the present application;

[0029] Figure 3 FIG. 3 is a schematic diagram of the structure of the low-voltage power supply system in a vehicle body provided by an embodiment of the present application;

[0030] Figure 4 A schematic diagram of a low-voltage power supply system provided for Embodiment Two of the present application;

[0031] Figure 5 A structural schematic diagram of a low-voltage power supply system provided for Embodiment Two of the present application in a vehicle body;

[0032] Figure 6 A schematic diagram of a low-voltage power supply system provided for Embodiment Three of the present application;

[0033] Figure 7 A structural schematic diagram of a low-voltage power supply system provided for Embodiment Three of the present application in a vehicle body.

[0034] Reference signs:

[0035] 10 - vehicle body;

[0036] 11 - chassis;

[0037] 111 - front region;

[0038] 112 - middle region;

[0039] 113 - rear region;

[0040] 12 - front cabin;

[0041] 13 - passenger cabin;

[0042] 14 - vehicle wheel;

[0043] 20 - DCDC converter;

[0044] 30 - main distribution box;

[0045] 40 - main battery;

[0046] 50 - on-vehicle low-voltage load;

[0047] 51 - steering unit;

[0048] 52 - braking unit;

[0049] 53 - intelligent driving unit;

[0050] 54 - domain control unit;

[0051] 61 - first redundant distribution box;

[0052] 62 - second redundant distribution box;

[0053] 63 - redundant battery;

[0054] 70 - first cut-off switch;

[0055] 71 - first port;

[0056] 72 - second port;

[0057] 80 - second cut-off switch. DETAILED DESCRIPTION

[0058] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will further describe the specific technical solutions of the present application with reference to the drawings in the embodiments of the present application. The following embodiments are used to explain the present application, but not to limit the scope of the present application.

[0059] In the embodiments of the present application, the terms "first", "second" are only used for descriptive purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0060] In addition, in the embodiments of the present application, the orientation terms such as "upper", "lower", "left" and "right" are defined with respect to the orientation of the components shown in the drawings, and it should be understood that these directional terms are relative concepts, which are used for relative description and clarification, and can be changed accordingly according to the change of the orientation of the components placed in the drawings.

[0061] In the embodiments of the present application, unless otherwise explicitly specified and limited, the term "connection" should be understood in a broad sense, for example, "connection" can be fixed connection, or detachable connection, or integral; can be directly connected, or indirectly connected through intermediate medium.

[0062] In the embodiments of the present application, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or device. Without more limitation, the element defined by the sentence "including a…" does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0063] In the embodiments of the present application, the words such as "exemplary" or "for example" are used to mean an example, illustration or description. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as more preferred or more advantageous than other embodiments or design solutions. Rather, the use of the words such as "exemplary" or "for example" is intended to present the relevant concept in a specific manner.

[0064] In a vehicle, the power supply system is responsible for providing necessary power support for various electronic and electrical systems of the vehicle, and is often referred to as the "heart" of the vehicle. For vehicle models with L3 intelligent driving and steer-by-wire and brake functions, L3 intelligent driving and traditional steer-by-wire and brake functions, and conventional intelligent driving or non-intelligent driving, the power supply system solutions are different, the power supply architecture needs to be adjusted, and it is difficult to effectively compatible, affecting the universality of the vehicle body, causing the complexity of production to increase, and the production cost to rise substantially.

[0065] Therefore, the low-voltage power supply system provided by the present application can be used for different vehicle models such as L3 intelligent driving and steer-by-wire and brake functions, L3 intelligent driving and traditional steer-by-wire and brake functions, and conventional intelligent driving or non-intelligent driving. The vehicle body can be universal, facilitating the arrangement of different low-voltage power supply systems. When switching between different vehicle models, the adjustment requirement of the low-voltage power supply system is minimized, which can reduce the complexity in the design and production process, thereby reducing the cost.

[0066] Embodiment one

[0067] The present application provides a low-voltage power supply system applied to a vehicle body 10. As shown in Figure 1 , the vehicle body 10 includes a chassis 11, a front engine compartment 12, and a passenger compartment 13. The chassis 11 has a front area 111 corresponding to the front engine compartment 12, a middle area 112 corresponding to the passenger compartment 13, and a rear area 113 away from the front area 111.

[0068] As shown in Figure 1 , Figure 2 and Figure 3 , the low-voltage power supply system includes a first power supply system, which includes a DCDC converter 20 and a main distribution box 30. The DCDC converter 20 is arranged in the rear area 113 of the chassis 11. The main distribution box 30 is arranged in the rear area 113 of the chassis 11. The DCDC converter 20 is electrically connected to the main distribution box 30 and supplies power to the vehicle low-voltage load 50 through the main distribution box 30.

[0069] The low-voltage power supply system provided by the present application arranges the DCDC converter 20 in the rear area 113 of the chassis 11 and arranges the main distribution box 30 in the rear area 113 of the chassis 11, thereby improving the universality of the vehicle body 10. For different vehicle models such as L3 intelligent driving and steer-by-wire and brake functions, L3 intelligent driving and traditional steer-by-wire and brake functions, and conventional intelligent driving or non-intelligent driving, the vehicle body 10 can be universal, facilitating the arrangement of different low-voltage power supply systems. When switching between different vehicle models, the adjustment requirement of the low-voltage power supply system is minimized, which can reduce the complexity in the design and production process, thereby reducing the cost.

[0070] The DCDC converter 20 is an electronic device for converting direct current DC from one voltage level to another voltage level. In this example, the DCDC converter 20 is connected to the high-voltage output of the vehicle body 10 to convert the voltage of the high-voltage battery pack of the vehicle body 10 into a voltage required by the low-voltage system of the vehicle (usually 12V or 48V) power input, to supply power to the low-voltage load 50 on the vehicle. Through the efficient voltage conversion of the DCDC converter 20, stable power supply can be provided for the low-voltage power supply system of the vehicle, while improving the overall energy efficiency.

[0071] The main distribution box 30 is responsible for distributing low-voltage power from the DCDC converter 20 to various low-voltage loads 50 on the vehicle. Through the efficient power distribution of the main distribution box 30, the vehicle can support the normal operation of various functions and systems, improving user experience and vehicle performance.

[0072] The DCDC converter 20 is electrically connected to the main distribution box 30 and supplies power to the low-voltage load 50 on the vehicle through the main distribution box 30. This design not only improves overall efficiency, but also simplifies the electrical architecture of the vehicle, making maintenance and fault diagnosis easier.

[0073] In some embodiments of the present application, the first power supply system further includes a main battery 40, which is arranged in the front engine compartment 12 and is electrically connected to the main distribution box 30 and supplies power to the low-voltage load 50 on the vehicle through the main distribution box 30. The main battery 40 and the DCDC converter 20 both serve as the main power supply for the low-voltage power supply system, achieving dual power supply and improving the redundancy and reliability of the low-voltage power supply system, which is suitable for conventional intelligent driving or non-intelligent driving vehicle models.

[0074] The main battery 40 is arranged in the front engine compartment 12, and the DCDC converter 20 is arranged in the rear area 113 of the chassis 11. Both the main battery 40 and the DCDC converter 20 serve as the main power supply for the low-voltage power supply system. In the event of a collision problem with the vehicle, such as a collision of the vehicle head, causing the main battery 40 to lose power, the DCDC converter 20 located at the rear of the vehicle will not be affected and will provide stable low-voltage power, ensuring the continuous operation of the low-voltage power supply system. When a collision occurs at the rear of the vehicle, causing the DCDC converter 20 to lose power, the main battery 40 arranged in the front engine compartment 12 will not be affected and will provide stable low-voltage power, ensuring the continuous operation of the low-voltage power supply system, thereby enhancing the safety of the vehicle in use.

[0075] The low-voltage power supply system provided by the embodiment of the present application can be applied to conventional intelligent driving or non-intelligent driving vehicle models.

[0076] In some embodiments of the present application, the low-voltage load 50 includes at least one of a steering unit 51, a braking unit 52, an intelligent driving unit 53, and a domain control unit 54.

[0077] In some embodiments of the present application, the low-voltage load 50 includes all of the steering unit 51, the braking unit 52, the intelligent driving unit 53, and the domain control unit 54.

[0078] The steering unit 51 is responsible for controlling the steering system of the vehicle, ensuring that the driver can accurately control the direction of the vehicle, including the Electric Power Steering (EPS), which requires stable low-voltage power support to ensure the response speed and reliability of the system.

[0079] The braking unit 52 is responsible for controlling the braking system of the vehicle, including the Anti-lock Braking System (ABS) and the Electronic Stability Control (ESC), which monitors the speed of each wheel 14 in real time through the wheel speed sensor, and the Electronic Stability Control is responsible for processing sensor data and performing stability control. These systems rely on low-voltage power to provide fast response and accurate control, ensuring the safe braking performance of the vehicle.

[0080] The intelligent driving unit 53 includes automatic driving and driving assistance systems such as Adaptive Cruise Control (ACC) and Lane Keeping Assist (LKA), which can automatically adjust the vehicle speed according to traffic conditions to maintain a safe distance from the vehicle in front. Lane Keeping Assist monitors the position of the vehicle in the lane and makes fine adjustments as needed to prevent the vehicle from accidentally deviating from the lane. Automatic driving and driving assistance systems require continuous power supply to process sensor data and perform complex computing tasks to achieve intelligent driving functions.

[0081] The domain control unit 54 is responsible for integrating and managing multiple Electronic Control Units (ECU) of the vehicle, achieving coordination and optimization between different systems. As the electronic control center of the vehicle, the domain control unit 54 requires stable power support to ensure its efficient operation and real-time response. In the vehicle, through the domain control unit, the control functions of components such as doors and windows can be centrally managed, improving the performance and safety of the vehicle.

[0082] By providing reliable low-voltage power support for the steering unit 51, the braking unit 52, the intelligent driving unit 53, and the domain control unit 54, the vehicle can achieve higher safety, performance, and intelligent level. The design of the low-voltage power supply system needs to ensure that these units can obtain stable and sufficient power supply under various operating conditions to meet their functional requirements.

[0083] Embodiment Two

[0084] Referring to Figure 1 , Figure 4 and Figure 5 , the low-voltage power supply system provided by Embodiment Two includes the first power supply system described above, and further includes a second power supply system, which includes a first redundant distribution box 61. The first redundant distribution box 61 is arranged in parallel with the main distribution box 30 between the main battery 40 and the vehicle-mounted low-voltage load 50, and is arranged in the front compartment 12.

[0085] In Embodiment Two, the first redundant distribution box 61 is arranged in parallel with the main distribution box 30, so that when either of the first redundant distribution box 61 and the main distribution box 30 fails, the other one can continue to work normally. This configuration provides double protection for power distribution, and the parallel configuration also simplifies the power switching process and ensures a quick response in the event of a failure.

[0086] By adding the first redundant distribution box 61 between the main battery 40 and the vehicle-mounted low-voltage load 50, the first redundant distribution box 61 can continue to supply power to the vehicle-mounted low-voltage load 50 when the main distribution box 30 fails, thereby improving the reliability and safety of the low-voltage power supply system.

[0087] Arranging the first redundant distribution box 61 in the front compartment 12 can make use of the space of the front compartment 12, and at the same time optimize the cable routing and reduce power transmission loss. The front compartment 12 is usually an area of the vehicle that is easy to maintain and inspect, which makes it more convenient to maintain and diagnose faults of the first redundant distribution box 61.

[0088] In some embodiments of the present application, the low-voltage power supply system further includes a first cut-off switch 70 having a first port 71 and a second port 72. The first port 71 is electrically connected to the DCDC converter 20, and the second port 72 is electrically connected to the main battery 40. The first cut-off switch 70 is arranged in the front compartment 12 close to the main battery 40.

[0089] The first cut-off switch 70 can selectively use one of the DCDC converter 20 and the main battery 40 as the working power supply of the low-voltage power supply system. When the DCDC converter 20 needs to be maintained or fails, the main battery 40 can be switched to as a backup power supply to maintain normal power supply of the low-voltage power supply system; when the main battery 40 needs to be maintained or fails, the DCDC converter 20 can be switched to for power supply, thereby improving the safety and reliability of use.

[0090] When an abnormal situation of the low-voltage power supply system is detected, the first cut-off switch 70 can quickly isolate the faulty power supply, effectively isolate the fault in a specific area, prevent it from affecting the entire low-voltage power supply system, and protect the safety of the vehicle and the passengers.

[0091] The first cut-off switch 70 is arranged in the front compartment 12 close to the main battery 40, which can reduce the cable length, reduce power transmission loss, and simplify wiring.

[0092] In some embodiments of the present application, the first cut-off switch 70 can be an air switch, for example.

[0093] In this embodiment two, there are two circuits to supply power to the low-voltage load 50 in the vehicle, in which the DCDC converter 20 serves as the main power supply, and supplies power to the low-voltage load 50 in the vehicle through the main distribution box 30; while the main battery 40 serves as a redundant power supply, and provides redundant power to the low-voltage load 50 in the vehicle through the first redundant distribution box 61. The first cut-off switch 70 is used for power switching between the DCDC converter 20 and the main battery 40. This redundant and parallel configuration not only improves the reliability of the system, but also enhances the safety and adaptability of the vehicle in various situations.

[0094] The low-voltage power supply system provided in this embodiment two can be applied to vehicles with L3 intelligent driving and traditional steering and braking functions.

[0095] Compared with the low-voltage power supply system provided in this embodiment one, the low-voltage power supply system provided in this embodiment two only needs a first cut-off switch 70 and a first redundant distribution box 61, and the positions of other elements in the low-voltage power supply system do not need to be adjusted, which can simplify the installation process of the low-voltage power supply system, reduce the installation time and complexity, and make the production process of different vehicle models not need to make a lot of adjustments and re-layout of the vehicle body 10 structure, improve the versatility of the vehicle body 10, and be conducive to reducing the complexity and design cost of production.

[0096] Embodiment three

[0097] Reference Figure 1 , Figure 6 and Figure 7 As shown in the drawings, the low-voltage power supply system provided in this embodiment three includes the above-mentioned first power supply system, and further includes a third power supply system, which includes: a second redundant distribution box 62 and a redundant battery 63, the second redundant distribution box 62 is arranged in parallel with the main distribution box 30 between the main battery 40 and the low-voltage load 50 in the vehicle, and the second redundant distribution box 62 is arranged in the front compartment 12; the redundant battery 63 is connected in series between the second redundant distribution box 62 and the main battery 40, and the redundant battery 63 is arranged in the passenger compartment 13.

[0098] The second redundant distribution box 62 is arranged in parallel with the main distribution box 30 between the main battery 40 and the low-voltage load 50 on the vehicle, and can continue to supply power to the low-voltage load 50 on the vehicle when the main distribution box 30 fails, thereby improving the reliability and safety of the low-voltage power supply system.

[0099] The second redundant distribution box 62 is arranged in the front cabin 12, and makes full use of the space in the front cabin 12, optimizes the cable layout, and reduces power transmission loss.

[0100] The redundant battery 63 is connected in series between the second redundant distribution box 62 and the main battery 40, and can provide additional power reserves. When the main battery 40 is insufficient or fails, the redundant battery 63 can provide backup power support to ensure the continuous operation of the key functions of the vehicle, such as braking function, steering function, etc., and improve the driving safety.

[0101] In some embodiments of the present application, the redundant battery 63 is arranged in the passenger cabin 13, for example, below the co-pilot seat or below the rear seat of the co-pilot seat. Of course, it can also be arranged at other positions in the passenger cabin 13, so as to make full use of the space in the passenger cabin while keeping the weight distribution of the vehicle balanced.

[0102] In some embodiments of the present application, the low-voltage power supply system further comprises a second cut-off switch 80 connected in series between the main battery 40 and the redundant battery 63. The second cut-off switch 80 is arranged in the front cabin 12 close to the main battery 40.

[0103] The main function of the second cut-off switch 80 is to provide isolation capability of the circuit, and selectively enable one of the main battery 40 and the redundant battery 63 to supply power, thereby ensuring stable operation of the low-voltage power supply system. Through the second cut-off switch 80, the use of the power supply can be flexibly managed under different operating conditions, and the energy consumption and power distribution can be optimized.

[0104] The second cut-off switch 80 is arranged in the front cabin 12 close to the main battery 40, which can reduce the cable length, reduce the power transmission loss, and simplify the wiring.

[0105] In some embodiments of the present application, the second cut-off switch 80 can be an air switch, for example.

[0106] In the third embodiment, two circuits supply power to the low-voltage load 50, in which the DCDC converter 20 and the main battery 40 serve as the main power supply, supply power to the low-voltage load 50 through the main distribution box 30, and the redundant battery 63 serves as the redundant power supply, supplies power to the low-voltage load 50 through the second redundant distribution box 62. The second cut-off switch 80 between the main battery 40 and the redundant battery 63 can quickly identify and respond to power supply failure, so that the other circuit can work normally without being affected after one circuit fails, reducing the simultaneous failure of the main power supply and the redundant power supply, and improving the reliability and safety of the low-voltage power supply system.

[0107] The low-voltage power supply system provided in the third embodiment can be applied to a vehicle model with L3 intelligent driving and with a steer-by-wire and brake-by-wire function.

[0108] In some embodiments of the present application, the DCDC converter 20 and the main distribution box 30 are arranged in the rear area 113 and spaced apart from each other along the width direction of the vehicle body 10.

[0109] In some embodiments of the present application, the DCDC converter 20 is arranged in the right area in the rear area 113, and the main distribution box 30 is arranged in the left area in the rear area 113.

[0110] In some embodiments of the present application, the main battery 40 and the second redundant distribution box 62 are arranged in the front engine compartment 12 and spaced apart from each other along the width direction of the vehicle body 10.

[0111] In some embodiments of the present application, the main battery 40 is arranged in the left area in the front engine compartment 12, and the second redundant distribution box 62 is arranged in the right area in the front engine compartment 12. The left area and the right area are respectively the left side and the right side of the vehicle body 10 in the driving direction.

[0112] Compared with the low-voltage power supply system provided in the second embodiment, the low-voltage power supply system provided in the third embodiment only needs to add the redundant battery 63, without the need to re-adjust the arrangement positions of other elements. Compared with the low-voltage power supply system provided in the first embodiment, the low-voltage power supply system provided in the third embodiment only needs to add the redundant battery 63, the second redundant distribution box 62, and the second cut-off switch 80, so that the structure of the vehicle body 10 does not need to be adjusted and re-arranged, improving the versatility of the vehicle body 10 and being conducive to reducing the complexity of production and design cost.

[0113] The present application also provides a vehicle, comprising a vehicle body 10 and the above-mentioned low-voltage power supply system.

[0114] The vehicle in the present application can refer to a large car, a small car, a special car, and the like. For example, according to the vehicle type, the vehicle in the present application can be a sedan type, a SUV type, a Multi-Purpose Vehicles (MPV) type, or other types. For the vehicle, generally, wheels 14, a power source, and a transmission system arranged between the wheels 14 and the power source are provided. The transmission system can transmit power provided by the power source to the wheels 14 to drive the wheels 14 to rotate, thereby driving the vehicle to travel.

[0115] It should be noted that the type of the power source of the vehicle is not limited in the embodiments of the present application. For example, for an electric vehicle, the power source can refer to an electric motor; for a hybrid vehicle, the power source can refer to an engine or an electric motor; and for a vehicle powered in other ways, the power source can refer to a device that generates power.

[0116] The low-voltage power supply system and the vehicle provided by the present application solve the problem that the structure of the same vehicle body 10 is difficult to adapt to low-voltage power supply systems of different vehicle types, and the problem of poor universality of the vehicle body 10. The same vehicle body 10 can adapt to different configuration requirements without the need to redesign the vehicle body 10.

[0117] The low-voltage power supply system and the vehicle provided by the present application can be compatible with low-voltage power supply system configurations of different vehicle types, have good compatibility, and do not need to adjust the arrangement scheme of the low-voltage power supply system for different configuration vehicle types. The low-voltage power supply system can completely adapt to different configuration requirements without the need to rearrange the low-voltage power supply system, thereby reducing costs.

[0118] The low-voltage power supply system and the vehicle provided by the present application only need to add or remove elements of the low-voltage power supply system according to different configuration types for the structure of the same vehicle body 10 without the need to change the structure of the vehicle body 10, thereby avoiding the problem that different configuration vehicle types need to adjust the overall vehicle arrangement.

[0119] The low-voltage power supply system and the vehicle provided by the present application supply power to the vehicle-mounted low-voltage load 50 through two sets of power supply circuits. When a collision problem occurs in the vehicle, for example, the vehicle head collides, the DCDC converter 20 located at the tail of the vehicle will not be affected to provide stable low-voltage power, thereby ensuring the continuous operation of the low-voltage power supply system. When the tail of the vehicle collides and the DCDC converter 20 cannot supply power, the main battery 40 arranged in the front cabin 12 or the redundant battery 63 arranged in the passenger cabin 13 will not be affected to provide stable low-voltage power, thereby ensuring the continuous operation of the low-voltage power supply system and enhancing the use safety of the vehicle.

[0120] The above sequence numbers of the embodiments of the present application are only for description, and do not represent the advantages and disadvantages of the embodiments. The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation using the content of the specification and drawings of the present application, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A low voltage power supply system, characterized by, Applied to a vehicle body (10) comprising a chassis (11), a front engine compartment (12) and a passenger compartment (13), the chassis (11) having a front region (111) corresponding to the front engine compartment (12), a middle region (112) corresponding to the passenger compartment (13), and a rear region (113) away from the front region (111), the low-voltage power supply system comprising a first power supply system, the first power supply system comprising: a DCDC converter (20) arranged in the rear region (113) of the chassis (11); a main distribution box (30) arranged in the rear region (113) of the chassis (11), the DCDC converter (20) being electrically connected to the main distribution box (30) and supplying power to a vehicle-mounted low-voltage load (50) through the main distribution box (30).

2. The low voltage power supply system of claim 1, wherein, The first power supply system further comprises a main battery (40) arranged in the front engine compartment (12), the main battery (40) being electrically connected to the main distribution box (30) and supplying power to the vehicle-mounted low-voltage load (50) through the main distribution box (30).

3. The low voltage power supply system of claim 2, wherein, Further comprising a second power supply system, the second power supply system comprising: a first redundant distribution box (61) arranged in parallel with the main distribution box (30) between the main battery (40) and the vehicle-mounted low-voltage load (50), the first redundant distribution box (61) being arranged in the front engine compartment (12).

4. The low voltage power supply system of claim 3, wherein, Further comprising a first cut-off switch (70) having a first port (71) and a second port (72), the first port (71) being electrically connected to the DCDC converter (20), the second port (72) being electrically connected to the main battery (40), the first cut-off switch (70) being arranged in the front engine compartment (12) close to the main battery (40).

5. The low voltage power supply system of claim 2, wherein, Further comprising a third power supply system, the third power supply system comprising: a second redundant distribution box (62) arranged in parallel with the main distribution box (30) between the main battery (40) and the vehicle-mounted low-voltage load (50), the second redundant distribution box (62) being arranged in the front engine compartment (12); a redundant battery (63) connected in series between the second redundant distribution box (62) and the main battery (40), the redundant battery (63) being arranged in the passenger compartment (13).

6. The low voltage power supply system of claim 5, wherein, Further comprising a second cut-off switch (80) connected in series between the main battery (40) and the redundant battery (63), the second cut-off switch (80) being arranged in the front engine compartment (12) close to the main battery (40).

7. The low voltage power supply system according to any of claims 1-6, characterized by Along the width direction of the vehicle body (10), the DCDC converter (20) and the main distribution box (30) are arranged in the rear region (113) at a distance from each other.

8. The low voltage power supply system according to claim 5 or 6, characterized in that, The main battery (40) and the second redundant power distribution box (62) are arranged in the front cabin (12) along the width direction of the vehicle body (10) and are spaced apart from each other.

9. The low voltage power supply system according to any of claims 1-6, characterized by The low-voltage load (50) includes at least one of a steering unit (51), a braking unit (52), an intelligent driving unit (53), and a domain control unit (54).

10. A vehicle characterized by comprising: Comprising: a vehicle body (10); and, a low-voltage power supply system according to any one of claims 1 to 9.

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