Weak-current power supply wiring structure of electric vehicle

Abstract

The utility model discloses a weak current power supply wiring structure of an electric vehicle, which comprises a power supply module, a whole power line, an inner power line, an inner weak wire, an outer transmission line, a protection piece, a PCB (Printed Circuit Board) and a function unit, the PCB is provided with a function line terminal and a power line terminal, and the power supply module is electrically connected with the power line terminal through the whole power line. The inner power line and the inner weak wire are arranged on the PCB, one end of the inner power line is electrically connected to the output end of the power line terminal, one end of the inner weak wire is electrically connected to the function line terminal, the inner power line is electrically connected with the other end of the inner weak wire, and the protection piece is electrically connected between the inner power line and the inner weak wire; the outer transmission line is electrically connected with the function line terminal and the function unit, and the outer transmission line is electrically connected with an electric door lock. And the inner weak electric wire is pulled out from the inner power wire and is routed on the PCB, so that the wiring convenience is improved, and the safety of the whole vehicle is improved through the protection piece.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electric vehicle power supply, especially to an electric vehicle weak current power supply wiring structure. BACKGROUND

[0002] The electric vehicle includes strong current line and weak current line when supplying power, the strong current line and weak current line are pulled out from the positive pole of the battery and preferentially pass to the electric door lock key, and then are branched to other units by the electric door lock, so that the wiring harness is long and the wiring is complex, and there is also a lack of corresponding protection structure, which affects the safety during power supply and needs to be improved. SUMMARY

[0003] The utility model provides a new electric vehicle weak current power supply wiring structure in view of the defects of complex wiring structure, long wiring length and low safety of weak current line and strong current line during weak current power supply of the electric vehicle in the prior art.

[0004] In order to solve the above technical problems, the utility model realizes the following technical scheme:

[0005] A weak current power supply wiring structure of an electric vehicle, comprising a power module, further comprising an integral power line, an inner power line, an inner weak current line, an outer transmission line, a protection piece, a PCB board and a functional unit, the PCB board is provided with a function line terminal and a power line terminal, the power module and the power line terminal are electrically connected through the integral power line, the inner power line and the inner weak current line are arranged on the PCB board, one end of the inner power line is electrically connected to the output end of the power line terminal, one end of the inner weak current line is electrically connected to the function line terminal, the other end of the inner power line and the inner weak current line is electrically connected, and the protection piece is electrically connected between the inner power line and the inner weak current line; the outer transmission line is electrically connected to the power supply output end of the function line terminal, the electric door lock is electrically connected to the outer transmission line, the GND input end of the functional unit is electrically connected to the GND output end on the function line terminal, and the power input end of the functional unit is electrically connected to the outer transmission line.

[0006] The inner weak current line is pulled out from the inner power line and is wired on the PCB board through the function line terminal and the power line terminal, which improves the convenience during wiring, simplifies the whole vehicle electrical wiring harness, reduces the failure rate of the wiring harness and reduces the use cost; the protection piece improves the safety of the whole vehicle and facilitates use.

[0007] As preferred, the weak current power supply wiring structure of the electric vehicle, the protection piece is a recoverable fuse, and the two ends of the recoverable fuse are respectively electrically connected to the inner power line and the inner weak current line.

[0008] The protection piece adopts a recoverable fuse, on one hand, the recoverable fuse can continue to be used after the fault point is repaired, thereby prolonging the service life of the protection piece, on the other hand, the recoverable fuse can play a role of overcurrent protection, thereby improving the safety of the whole vehicle.

[0009] As preferred, the above-mentioned electric vehicle low-voltage power supply wiring structure further comprises an air switch, the power line terminal comprises a strong current input end, and the air switch is electrically connected between the positive electrode of the power supply module and the strong current input end.

[0010] When the current output by the power supply module exceeds the standard current of the air switch, the air switch can cut off the connection between the power supply module and the power line terminal, thereby protecting the power supply module and the power line terminal, and further improving the safety during use.

[0011] As preferred, the above-mentioned electric vehicle low-voltage power supply wiring structure has an upper limit current of 30 A for the function line terminal and an upper limit current of 5 A for the power line terminal.

[0012] By limiting the upper limit current of different lines, the occurrence of overcurrent can be prevented, the risk of electrical fire can be reduced, and the safety during use can be improved.

[0013] As preferred, the above-mentioned electric vehicle low-voltage power supply wiring structure has the inner low-voltage line in a bent shape, the bending angle of the inner low-voltage line is 90 degrees, the width of the inner power line and the inner low-voltage line on the PCB is 5 mm, and the thickness of the inner power line and the inner low-voltage line on the PCB is 1.5 oz.

[0014] The inner low-voltage line in a bent shape and the bending angle of 90 degrees of the inner low-voltage line can more effectively utilize the space, improve the anti-interference ability during signal transmission, the width of 5 mm of the line can reduce the resistance of the line and improve the current transmission efficiency, and the thickness of 1.5 oz of the line provides good conductivity, which helps to reduce heat loss and improve energy efficiency.

[0015] As preferred, the above-mentioned electric vehicle low-voltage power supply wiring structure has a recoverable fuse of the model 2018L030 / 60GR.

[0016] The use of the recoverable fuse of the model 2018L030 / 60GR can provide efficient and reliable overcurrent protection for the low-voltage power supply system of the electric vehicle, while reducing the maintenance requirements and costs. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The structure block diagram of the utility model.

[0018] Explanation of reference signs: 1, power module; 2, protection piece; 3, PCB board; 4, functional unit; 5, functional line terminal; 6, power line terminal; 7, electric door lock; 8, air switch. DETAILED DESCRIPTION

[0019] The utility model will be described in further detail below in combination with the drawings Figure 1 and specific embodiments, but they are not limitations on the utility model:

[0020] Embodiment 1

[0021] As Figure 1 shown, a weak current power supply wiring structure of an electric vehicle, comprising a power module 1, further comprising an integral power line, an inner power line, an inner weak current line, an outer transmission line, a protection piece 2, a PCB board 3 and a functional unit 4, the PCB board 3 is provided with a functional line terminal 5 and a power line terminal 6, the power module 1 is electrically connected with the power line terminal 6 through the integral power line, the inner power line and the inner weak current line are all arranged on the PCB board 3, one end of the inner power line is electrically connected at the output end of the power line terminal 6, one end of the inner weak current line is electrically connected on the functional line terminal 5, the other end of the inner power line and the inner weak current line is electrically connected, the protection piece 2 is electrically connected between the inner power line and the inner weak current line; the outer transmission line is electrically connected on the power supply output end of the functional line terminal 5, the outer transmission line is electrically connected with an electric door lock 7, the GND input end of the functional unit 4 is electrically connected with the GND output end on the functional line terminal 5, and the power input end of the functional unit 4 is electrically connected with the outer transmission line.

[0022] As preferred, the protection piece 2 is a recoverable fuse, and the two ends of the recoverable fuse are respectively electrically connected on the inner power line and the inner weak current line.

[0023] As preferred, further comprising an air switch 8, the power line terminal 6 comprises a strong current input end, and the air switch 8 is electrically connected between the positive pole of the power module 1 and the strong current input end.

[0024] As preferred, the upper limit current of the functional line terminal 5 is 30A, and the upper limit current of the power line terminal 6 is 5A.

[0025] As preferred, the inner weak current line is in a bent shape, the bending angle of the inner weak current line is 90 degrees, the wiring width of the inner power line and the inner weak current line on the PCB board 3 is 5mm, and the wiring thickness of the inner power line and the inner weak current line on the PCB board 3 is 1.5oz.

[0026] As preferred, the model of the recoverable fuse is 2018L030 / 60GR.

[0027] The inner weak current line is pulled out from the inner power line, and the whole power line, the inner power line, the inner weak current line and the outer transmission line are routed on the PCB 3 through the function line terminal and the power line terminal, which improves the convenience during wiring, simplifies the whole vehicle electrical wiring harness, reduces the failure rate of the wiring harness and reduces the use cost; the safety of the whole vehicle is improved through the protection member 2 and the air switch 8, and the use is facilitated.

[0028] In summary, the above only for the preferred embodiments of the present application, any changes and modifications made in the scope of the application for the patent of the present application, should belong to the scope of the present application.

Claims

1. An electric vehicle low-voltage power supply wiring structure comprising a power supply module (1), characterized in that: The power line, the inner power line, the inner weak current line, the outer transmission line, the protection piece (2), the PCB board (3) and the functional unit (4) are further included, the functional line terminal (5) and the power line terminal (6) are arranged on the PCB board (3), the power module (1) and the power line terminal (6) are electrically connected through the whole power line, the inner power line and the inner weak current line are arranged on the PCB board (3), one end of the inner power line is electrically connected to the output end of the power line terminal (6), one end of the inner weak current line is electrically connected to the functional line terminal (5), the other end of the inner power line and the inner weak current line is electrically connected, and the protection piece (2) is electrically connected between the inner power line and the inner weak current line; the outer transmission line is electrically connected to the power supply output end of the functional line terminal (5), the electric door lock (7) is electrically connected to the outer transmission line, the GND input end of the functional unit (4) is electrically connected to the GND output end of the functional line terminal (5), and the power input end of the functional unit (4) is electrically connected to the outer transmission line.

2. The weak current power supply wiring structure for electric vehicles according to claim 1, characterized by: The protection piece (2) is a recoverable fuse, and the two ends of the recoverable fuse are respectively electrically connected to the inner power line and the inner weak current line.

3. The weak current power supply wiring structure for electric vehicles according to claim 1, characterized by: The power line terminal (6) includes a strong current input end, and the air switch (8) is electrically connected between the positive electrode of the power module (1) and the strong current input end.

4. The weak current power supply wiring structure for electric vehicles according to claim 1, characterized by: The upper limit current of the functional line terminal (5) is 30A, and the upper limit current of the power line terminal (6) is 5A.

5. The weak current power supply wiring structure for electric vehicles according to claim 1, characterized by: The inner weak current line is in a bent shape, the bending angle of the inner weak current line is 90 degrees, the wiring width of the inner power line and the inner weak current line on the PCB board (3) is 5mm, and the wiring thickness of the inner power line and the inner weak current line on the PCB board (3) is 1.5oz.

6. The weak current power supply wiring structure for electric vehicles according to claim 2, characterized by: The model of the recoverable fuse is 2018L030 / 60GR.

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