Centralized low-voltage power supply system for vehicle

Abstract

The utility model provides a centralized low-voltage power supply system for a vehicle. The centralized low-voltage power supply system comprises a centralized low-voltage power supply distribution device and a fuse box in a cab, the centralized low-voltage power supply distribution device is provided with multiple paths of low-voltage output interfaces, the fuse box in the cab and the high-power load outside the cab are electrically connected with the corresponding low-voltage output interfaces respectively, and the fuse box in the cab is electrically connected with the whole vehicle low-power load; the centralized low-voltage power distribution device is provided with a DCDC conversion module, and the DCDC conversion module is electrically connected with the low-voltage output interface and used for converting input high-voltage direct current into low-voltage direct current and conducting low-voltage power supply on all loads of the whole vehicle through the low-voltage output interface. According to the utility model, the safety and scientificity of vehicle low-voltage power supply distribution can be improved, and the vehicle maintenance difficulty and wiring cost can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage power supply for vehicles, and in particular to a centralized low-voltage power supply system for vehicles. Background Art

[0002] Most of the low-voltage power supplies of existing vehicles are distributed in multiple levels through multiple fuse boxes. The first-level power distribution is performed through the fuse box outside the cab (such as the front cabin fuse box or the chassis fuse box, etc.), and the second-level power distribution is performed through the fuse box inside the cab. The arrangement of the fuse box outside the cab requires a more complex installation structure; the connection between the fuse box and the low-voltage power supply requires the use of a separate power harness, and considering the voltage drop, a power harness with a larger wire diameter needs to be arranged. This results in high cost, difficult maintenance, waterproofing and difficulty in arrangement when setting up the fuse box outside the cab. Therefore, it is of great significance to improve the power supply structure of the vehicle's low-voltage power supply to reduce the use of outdoor fuse boxes and reduce the difficulty of arrangement. Utility Model Content

[0003] The utility model provides a centralized low-voltage power supply system for vehicles, which solves the problem that the existing low-voltage power supply for vehicles needs to be equipped with an outdoor fuse box for primary power distribution, which is high in cost and difficult to repair. The utility model can improve the safety and scientificity of low-voltage power distribution for vehicles, and reduce the difficulty of vehicle repair and wiring costs.

[0004] In order to achieve the above objectives, the utility model provides the following technical solutions:

[0005] A centralized low-voltage power supply system for a vehicle, comprising: a centralized low-voltage power supply distribution device, a battery and a fuse box in a cab;

[0006] The centralized low-voltage power distribution device is provided with multiple low-voltage output interfaces, the battery, the fuse box in the cab and the high-power load outside the cab are electrically connected to the corresponding low-voltage output interfaces respectively, and the fuse box in the cab is electrically connected to the low-power load of the whole vehicle;

[0007] The centralized low-voltage power distribution device is provided with a DCDC conversion module, which is electrically connected to the low-voltage output interface and is used to convert the input high-voltage direct current into low-voltage direct current, and provide low-voltage power supply to various loads of the vehicle through the low-voltage output interface.

[0008] Preferably, the centralized low-voltage power distribution device further comprises: a power control module;

[0009] The power control module is connected in series between the DCDC conversion module and the low voltage output interface;

[0010] The power control module is used to control the disconnection of the electrical connection between the DCDC conversion module and the low voltage output interface when the output current of the low voltage output interface is greater than a set current threshold.

[0011] Preferably, the power control module includes at least any one of the following: a fuse and a power switch device.

[0012] Preferably, the centralized low-voltage power distribution device further includes: a current acquisition module;

[0013] The current acquisition module is signal-connected to the power control module, and the current acquisition module performs current acquisition on each of the low-voltage output interfaces to obtain the output current of each of the low-voltage output interfaces.

[0014] Preferably, the centralized low-voltage power distribution device further comprises: a CAN communication module;

[0015] The current acquisition module is signal-connected to the CAN communication module, and reports the working status information corresponding to each of the low-voltage output interfaces through the CAN communication module.

[0016] Preferably, the centralized low-voltage power distribution device is signal-connected to the vehicle body control center and the entertainment system control center respectively to realize low-voltage power distribution information interaction.

[0017] Preferably, the centralized low-voltage power distribution device is arranged outside the cab.

[0018] Preferably, the centralized low-voltage power distribution device is an integrated structure.

[0019] Preferably, it also includes: a battery;

[0020] The storage battery is electrically connected to the centralized low-voltage power distribution device.

[0021] Preferably, the centralized low-voltage power distribution device has a built-in low-voltage power supply, and the low-voltage power supply includes: a storage battery, a lithium battery or a sodium battery.

[0022] The utility model provides a centralized low-voltage power supply system for vehicles. By setting multiple low-voltage output interfaces and DCDC conversion modules in a centralized low-voltage power distribution device, the battery, the fuse box in the cab and the high-power load outside the cab are respectively connected to the corresponding low-voltage output ports, so that the DCDC conversion module can provide low-voltage power supply to the corresponding loads inside and outside the vehicle through the low-voltage output interface. The primary power distribution is achieved by the fuse box in the cab, and the high-power load outside the cab is directly powered by the centralized low-voltage power distribution device, thereby reducing the use of the fuse box. The existing vehicle low-voltage power supply needs to be equipped with an outdoor fuse box for primary power distribution, which is costly and difficult to maintain. The safety and scientificity of the vehicle low-voltage power distribution can be improved, and the difficulty of vehicle maintenance and wiring costs can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present utility model, the drawings required for use in the embodiments are briefly introduced below.

[0024] Figure 1 It is a schematic diagram of a vehicle centralized low-voltage power supply system provided by the utility model.

[0025] Figure 2 It is a structural schematic diagram of a centralized low-voltage power distribution device provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the solutions of the embodiments of the present utility model, the embodiments of the present utility model are further described in detail below in conjunction with the accompanying drawings and implementation methods.

[0027] In view of the fact that current vehicles need an outdoor fuse box outside the cab to supply power to outdoor loads, which has the problems of high cost and difficult maintenance, the utility model provides a vehicle centralized low-voltage power supply system, which solves the problem that the existing vehicle low-voltage power supply needs to be configured with an outdoor fuse box for primary power distribution, which has the problems of high cost and difficult maintenance. The utility model can improve the safety and scientificity of vehicle low-voltage power distribution and reduce the difficulty of vehicle maintenance and wiring costs.

[0028] like Figure 1 and Figure 2 As shown, a centralized low-voltage power supply system for a vehicle includes: a centralized low-voltage power supply distribution device, a battery, and a fuse box in the cab. The centralized low-voltage power supply distribution device is provided with a multi-channel low-voltage output interface 1, the battery, the fuse box in the cab, and the high-power load outside the cab are electrically connected to the corresponding low-voltage output interface respectively, and the fuse box in the cab is electrically connected to the low-power load of the whole vehicle.

[0029] The centralized low-voltage power distribution device is provided with a DCDC conversion module, which is electrically connected to the low-voltage output interface and is used to convert the input high-voltage direct current into low-voltage direct current, and provide low-voltage power supply to various loads of the vehicle through the low-voltage output interface.

[0030] Specifically, the centralized low-voltage power distribution device is provided with multiple low-voltage output interfaces, and the number of low-voltage output interfaces can be expanded according to demand, and each low-voltage output interface can be set to a different limiting current value according to the actual current demand. Each load outside the cab can be directly connected to a low-voltage output interface separately, wherein the load outside the cab generally includes a service brake system, a parking brake system, a steering system, a heat dissipation system and other driving assistance systems containing high-power loads. The battery is electrically connected to the DCDC conversion module through the corresponding low-voltage output interface. At the same time, the fuse box in the cab is also electrically connected to the DCDC converter through the corresponding low-voltage output interface. The DCDC converter converts the input high-voltage DC into the low-voltage DC required by each port to power each load. The system converts the low-voltage DC through the DCDC conversion module and directly supplies low-voltage power to the load outside the cab through the low-voltage output interface, which can reduce the difficulty of vehicle maintenance and wiring costs.

[0031] Furthermore, the centralized low-voltage power distribution device further includes: a power control module 2; the power control module 2 is connected in series between the DCDC conversion module and the low-voltage output interface. The power control module is used to control the disconnection of the electrical connection between the DCDC conversion module and the low-voltage output interface when the output current of the low-voltage output interface is greater than a set current threshold.

[0032] Furthermore, the power control module includes at least any one of the following: a fuse and a power switch device.

[0033] In practical applications, the power control module can be implemented by a control circuit or controlled by a microprocessor.

[0034] Furthermore, the centralized low-voltage power supply distribution device also includes: a current acquisition module (not shown in the figure); the current acquisition module is signal-connected to the power control module, and the current acquisition module performs current acquisition on each of the low-voltage output interfaces to obtain the output current of each of the low-voltage output interfaces.

[0035] The centralized low-voltage power distribution device also includes: a CAN communication module (not shown in the figure); the current acquisition module is signal-connected to the CAN communication module, and reports the working status information corresponding to each of the low-voltage output interfaces through the CAN communication module.

[0036] Furthermore, the centralized low-voltage power distribution device is signal-connected to the vehicle body control center and the entertainment system control center respectively to realize low-voltage power distribution information interaction.

[0037] Furthermore, the centralized low-voltage power distribution device is arranged outside the cab.

[0038] Furthermore, the centralized low-voltage power distribution device is an integrated structure.

[0039] In one embodiment, the system further includes: a battery; the battery is electrically connected to the centralized low-voltage power distribution device.

[0040] In another embodiment, the centralized low-voltage power distribution device may have a built-in low-voltage power supply, and the low-voltage power supply is a storage battery, a lithium battery, a sodium battery, etc.

[0041] It can be seen that the utility model provides a centralized low-voltage power supply system for vehicles. By setting multiple low-voltage output interfaces and DCDC conversion modules in a centralized low-voltage power distribution device, the battery, the fuse box in the cab and the high-power load outside the cab are respectively connected to the corresponding low-voltage output ports, so that the DCDC conversion module can provide low-voltage power supply to the corresponding loads inside and outside the vehicle through the low-voltage output interface. The first-level power distribution is achieved by the fuse box in the cab, and the high-power load outside the cab is directly powered by the centralized low-voltage power distribution device, thereby reducing the use of fuse boxes. It solves the problem that the existing vehicle low-voltage power supply needs to be equipped with an outdoor fuse box for first-level power distribution, which is high in cost and difficult to maintain. It can improve the safety and scientificity of the vehicle's low-voltage power distribution, and reduce the difficulty of vehicle maintenance and wiring costs.

[0042] The above describes in detail the structure, features and effects of the utility model based on the embodiments shown in the drawings. The above is only a preferred embodiment of the utility model, but the utility model is not limited to the scope of implementation shown in the drawings. Any changes made according to the concept of the utility model, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the description and the drawings, should be within the protection scope of the utility model.

Claims

1. A vehicle centralized low-voltage power supply system, characterized in that: include: Centralized low-voltage power distribution device and in-cab fuse box; The centralized low-voltage power distribution device is provided with multiple low-voltage output interfaces, the in-cab fuse box and the high-power load outside the cab are electrically connected to the corresponding low-voltage output interfaces respectively, and the in-cab fuse box is electrically connected to the low-power load of the vehicle; The centralized low-voltage power distribution device is provided with a DCDC conversion module, which is electrically connected to the low-voltage output interface and is used to convert the input high-voltage direct current into low-voltage direct current, and provide low-voltage power supply to various loads of the vehicle through the low-voltage output interface.

2. The vehicle centralized low-voltage power supply system according to claim 1, characterized in that: The centralized low-voltage power distribution device also includes: a power control module; The power control module is connected in series between the DCDC conversion module and the low voltage output interface; The power control module is used to control the disconnection of the electrical connection between the DCDC conversion module and the low voltage output interface when the output current of the low voltage output interface is greater than a set current threshold.

3. The vehicle centralized low-voltage power supply system according to claim 2, characterized in that: The power control module includes at least any one of the following: a fuse and a power switch device.

4. The vehicle centralized low-voltage power supply system according to claim 3, characterized in that: The centralized low-voltage power distribution device further includes: a current acquisition module; The current acquisition module is signal-connected to the power control module, and the current acquisition module performs current acquisition on each of the low-voltage output interfaces to obtain the output current of each of the low-voltage output interfaces.

5. The vehicle centralized low-voltage power supply system according to claim 4, characterized in that: The centralized low-voltage power distribution device also includes: a CAN communication module; The current acquisition module is signal-connected to the CAN communication module, and reports the working status information corresponding to each of the low-voltage output interfaces through the CAN communication module.

6. The vehicle centralized low-voltage power supply system according to claim 5, characterized in that: The centralized low-voltage power distribution device is respectively connected to the vehicle body control center and the entertainment system control center by signals to realize low-voltage power distribution information interaction.

7. The centralized low-voltage power supply system for vehicles according to claim 6, characterized in that: The centralized low-voltage power distribution device is arranged outside the cab.

8. The centralized low-voltage power supply system for vehicles according to claim 7, characterized in that: The centralized low-voltage power distribution device is an integrated structure.

9. The vehicle centralized low-voltage power supply system according to claim 8, characterized in that: Also includes: Batteries; The storage battery is electrically connected to the centralized low-voltage power distribution device.

10. The vehicle centralized low-voltage power supply system according to claim 8, characterized in that: The centralized low-voltage power distribution device has a built-in low-voltage power supply, and the low-voltage power supply includes: a storage battery, a lithium battery or a sodium battery.

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