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CN-119369935-B - Weak current system of vehicle and vehicle

CN119369935BCN 119369935 BCN119369935 BCN 119369935BCN-119369935-B

Abstract

The disclosure provides a weak current system of a vehicle and the vehicle, and belongs to the technical field of automobiles. In the disclosure, for each electric device of a vehicle, according to the estimated line length of the electric device and an engine compartment electric box and the estimated line length of the electric device and a passenger compartment electric box, determining which electric box the electric device is connected with. Therefore, the electric equipment in the electric automobile can be regularly distributed, the length of the electric wire required for supplying power to the electric equipment can be reduced as much as possible, the total length of the electric wire required in the automobile can be reduced on the whole, and the electric wire in the automobile is more concise and regular.

Inventors

  • DUAN YONGAN
  • ZHENG ADONG
  • WANG XIAOYUN
  • Huan Yuelai
  • Ang Sijia
  • XUE WENZHE

Assignees

  • 奇瑞汽车股份有限公司

Dates

Publication Date
20260505
Application Date
20241028

Claims (8)

  1. 1. A vehicle weak current system is characterized in that the vehicle weak current system is applied to a vehicle and comprises a weak current battery (1), an engine compartment electric box (2), a passenger compartment electric box (3) and a plurality of electric equipment (4); The engine compartment electric box (2) is electrically connected with the weak electric battery (1), the passenger compartment electric box (3) and a first electric device (4 a) and a third electric device (4 c) in the plurality of electric devices (4), wherein the line length of the electric connection of the first electric device (4 a) and the engine compartment electric box (2) is smaller than or equal to the estimated line length of the first electric device (4 a) and the passenger compartment electric box (3), the estimated line length of the third electric device (4 c) and the passenger compartment electric box (3) is smaller than or equal to the line length of the electric connection of the third electric device (4 c) and the engine compartment electric box (2), the line length of the electric connection of the third electric device (4 c) and the passenger compartment electric box (3) is added with the line length of the electric connection of the engine compartment electric box (2), if the estimated line length of the electric connection of the third electric device (4 c) and the engine compartment electric box (2) is smaller than or equal to the estimated line length of the electric connection of the electric device (2) is the electric connection of the engine compartment electric box (2), and the electric connection of the engine compartment electric box (2) is the electric connection of the electric device (2) between the passenger compartment electric device (4 c) and the electric device (2) is the electric device (2), and the electric device is the electric device (2) is the electric device after the electric device is the electric device A weak current battery (1) and an engine cabin electrical box (2) or a weak current battery (1) and a passenger cabin electrical box (3); For any two first electric equipment (4 a) meeting synchronous working conditions, the distance between first output ends (21 b) which are respectively electrically connected with the two first electric equipment (4 a) on the engine compartment electric equipment box (2) is larger than a first designated distance, and the distance between two lines which are respectively electrically connected with the two first electric equipment (4 a) on the engine compartment electric equipment box (2) is larger than a second designated distance, wherein the synchronous working conditions are that the average value of the duty ratio of the time length of two first electric equipment (4 a) which are determined based on historical use data of a plurality of vehicles and are operated simultaneously in the time length of the vehicles in a starting state is larger than a preset threshold; the passenger cabin electrical box (3) is electrically connected with second electrical equipment (4 b) in the plurality of electrical equipment (4), wherein the line length of the electrical connection between the second electrical equipment (4 b) and the passenger cabin electrical box (3) is smaller than or equal to the estimated line length of the second electrical equipment (4 b) and the engine cabin electrical box (2).
  2. 2. The vehicle weak current system according to claim 1, characterized in that the weak current battery (1) is located in an engine compartment of the vehicle, the engine compartment electrical box (2) is located in the engine compartment, and the passenger compartment electrical box (3) is located inside a center console of a passenger compartment of the vehicle.
  3. 3. The vehicle weak current system according to claim 1, wherein the nacelle electrical box (2) comprises a first distribution circuit (21) and a second distribution circuit (22); The first distribution circuit (21) comprises a first input end (21 a) and a plurality of first output ends (21 b), the first input end (21 a) is electrically connected with the weak current battery (1), and at least one first output end (21 b) is electrically connected with different first electric equipment (4 a) respectively; The second distribution circuit (22) comprises a second input end (22 a) and a plurality of second output ends (22 b), the second input end (22 a) is electrically connected with the weak current battery (1), and at least one second output end (22 b) is electrically connected with different first electric equipment (4 a) respectively; At least one first output end (21 b) which is not connected with the first electric equipment (4 a) and/or at least one second output end (22 b) which is not connected with the first electric equipment (4 a) are electrically connected with the passenger cabin electric box (3).
  4. 4. A weak vehicle electrical system according to claim 3, wherein the nacelle electrical box (2) further comprises a third distribution circuit (24); The third distribution circuit (24) comprises a third input end (24 a) and a plurality of third output ends (24 b), the third input end (24 a) is electrically connected with the weak current battery (1), and at least one third output end (24 b) is electrically connected with different first electric equipment (4 a) respectively.
  5. 5. The vehicular weak current system according to claim 4, wherein the third distribution circuit (24) further comprises a first switching unit (25), the first switching unit (25) being electrically connected to a controller; The first switch unit (25) is used for switching on or switching off the electrical connection between the third input end (24 a) and all the third output ends (24 b) under the control of the controller.
  6. 6. The vehicle weak current system according to claim 1, wherein the passenger compartment electrical box (3) comprises a fourth distribution circuit (31) and a fifth distribution circuit (32), the fourth distribution circuit (31) and the fifth distribution circuit (32) being connected in parallel; The fourth distribution circuit (31) comprises at least one fourth input end (31 a) and a plurality of fourth output ends (31 b), the at least one fourth input end (31 a) is electrically connected with the engine compartment electric box (2), and the at least one fourth output end (31 b) is electrically connected with different second electric equipment (4 b) respectively; The fifth distribution circuit (32) comprises at least one fifth input end (32 a) and a plurality of fifth output ends (32 b), the at least one fifth input end (32 a) is electrically connected with the engine compartment electric box (2), and the at least one fifth output end (32 b) is electrically connected with different second electric equipment (4 b) respectively.
  7. 7. The vehicle weak current system according to claim 6, wherein the fifth distribution circuit (32) further comprises a second switching unit (34), the second switching unit (34) being electrically connected to the controller; The second switch unit (34) is used for switching on or switching off the electrical connection between the fifth input end (32 a) and all the fifth output ends (32 b) under the control of the controller.
  8. 8. A vehicle, characterized in that it comprises a vehicle weak current system according to any one of claims 1-7.

Description

Weak current system of vehicle and vehicle Technical Field The disclosure relates to the technical field of automobiles, in particular to a weak current system of a vehicle and the vehicle. Background Various weak-current electric equipment such as an electric tail gate, an air conditioner panel, an atmosphere lamp and the like is arranged on the electric automobile. In order to ensure the power supply of the electric equipment, a vehicle weak current system is arranged in the electric automobile. The weak current system of the vehicle comprises a plurality of electrical boxes (more commonly, two electrical boxes) which are used for dividing one power supply line into a plurality of power supply lines so as to realize power supply to a plurality of electric equipment. The electric boxes, the electric boxes and the weak current batteries and the electric boxes and the electric equipment are all connected through wires. There are very many consumers of electricity in electric vehicles, which can lead to very cluttered wire connections. Disclosure of Invention The present disclosure provides a weak current system for a vehicle, which can solve the above technical problems existing in the related art. The technical scheme is as follows: in a first aspect, a vehicle weak current system is provided, the vehicle weak current system is applied to a vehicle, the vehicle weak current system comprises a weak current battery (1), an engine compartment electrical box (2), a passenger compartment electrical box (3) and a plurality of electrical equipment (4); The engine compartment electric box (2) is electrically connected with the weak current battery (1), the passenger compartment electric box (3) and a first electric device (4 a) of the plurality of electric devices (4), wherein the line length of the electric connection of the first electric device (4 a) and the engine compartment electric box (2) is smaller than or equal to the estimated line length of the first electric device (4 a) and the passenger compartment electric box (3); the passenger cabin electrical box (3) is electrically connected with second electrical equipment (4 b) in the plurality of electrical equipment (4), wherein the line length of the electrical connection between the second electrical equipment (4 b) and the passenger cabin electrical box (3) is smaller than or equal to the estimated line length of the second electrical equipment (4 b) and the engine cabin electrical box (2). In one possible implementation, the estimated line length is a shortest line length after the devices are electrically connected by a line and then line planning is performed based on the vehicle internal structure. In one possible implementation, the weak battery (1) is located in an engine compartment of the vehicle, the engine compartment electrical box (2) is located in the engine compartment, and the passenger compartment electrical box (3) is located inside a center console of a passenger compartment of the vehicle. In one possible implementation, the line length of the electrical box (2) of the engine compartment electrically connected with the weak battery (1) is smaller than the estimated line length of the electrical box (3) of the passenger compartment and the weak battery (1). In one possible implementation, the nacelle electrical box (2) comprises a first distribution circuit (21) and a second distribution circuit (22); the first distribution circuit (21) comprises a first input end (21 a) and a plurality of first output ends (21 b), the first input end (21 a) is electrically connected with the weak current battery (1), and at least one first output end (21 b) is electrically connected with different first electric equipment (4 a) respectively; The second distribution circuit (22) comprises a second input end (22 a) and a plurality of second output ends (22 b), the second input end (22 a) is electrically connected with the weak current battery (1), and at least one second output end (22 b) is electrically connected with different first electric equipment (4 a) respectively; At least one first output end (21 b) which is not connected with the first electric equipment (4 a) and/or at least one second output end (22 b) which is not connected with the first electric equipment (4 a) are electrically connected with the passenger cabin electric box (3). In one possible implementation, the rated current of the first electric device (4 a) connected to the first distribution circuit (21) is within a first current range, the rated current of the first electric device (4 a) connected to the second distribution circuit (22) is within a second current range, and the lower limit of the first current range is greater than or equal to the upper limit of the second current range. In one possible implementation manner, a fuse (23) is connected to a line electrically connected to each first electrical device (4 a) by the first distribution circuit (21), and a fuse (23) is con