System Power

Abstract

The present invention relates to a system power supply. The system power supply includes an input power supply, an operating power supply unit, a plurality of control modules, and a wire harness. The wire harness includes an operating power supply line and an input power supply line. In the plurality of control modules, the input power supply port is connected to the input power supply line, and the operating power supply port is connected to the operating power supply line. The input power supply is connected to the input power supply line, and the output of the operating power supply unit is connected to the operating power supply line. In the present invention, operating power is provided to the plurality of control modules via the operating power supply line, eliminating the need to install an operating power supply independently for each control module, and realizing low cost and high reliability of the control system. This is also advantageous in realizing miniaturization of the control module and integration into an integrated circuit.

Description

[Technical field]

[0001] The present invention relates to the field of vehicle control technology, and more particularly to a system power supply used to transmit operating power required for multiple control modules in a vehicle. [Background technology]

[0002] The operating power required for a typical control module is realized by converting the power supply included in the control module, and each control module is equipped with an operating power supply conversion device.

[0003] With the advancement of automobile technology, the control module of the vehicle is developed into local electric intelligent and miniaturized. The control system is used to control the electric appliances of the vehicle body, and a relatively large number of control modules are required. Due to the unstable input power supply of the automobile and the poor electrical environment of the automobile, the technical difficulty of arranging the operating power conversion device of the control module is increased, the power conversion is more complicated, and the cost is increased and the reliability is reduced.

[0004] Therefore, in a model in which the operating power supply is located in the main body of each control module, it is difficult to realize a plurality of control modules, it is also difficult to reduce the size of the plurality of control modules, and the cost efficiency of the control system is poor. Summary of the Invention

[0005] The present invention aims to provide a system power supply. This system power supply provides operating power to multiple control modules via a single operating power line. This eliminates the need for the conventional method of providing an independent operating power supply for each control module, realizing low-cost and high-reliability control systems. It is also advantageous in realizing miniaturization and integration of control modules.

[0006] The technical solutions of the present invention are as follows:

[0007] A system power supply including an input power source, an operating power supply unit, a plurality of control modules, and a wire harness, the wire harness including an operating power supply line and an input power supply line. In the plurality of control modules, the input power supply port is connected to the input power supply line, and the operating power supply port is connected to the operating power supply line. The input power source is connected to the input power supply line, and the output of the operating power supply unit is connected to the operating power supply line.

[0008] The input power source is a storage battery.

[0009] The input of the operating power supply unit is an input power supply or an externally connected power supply.

[0010] At least one of the plurality of control modules includes an operating power supply unit.

[0011] At least two operating power supply units are provided, and the output terminals of the operating power supply units are connected in series with a diode and then connected to a control power supply line.

[0012] The operating power supply unit may be an isolated DC / DC power supply, the positive input terminal of the isolated DC / DC power supply being connected to the input power supply, and the negative output terminal of the isolated DC / DC power supply being connected to the positive terminal of the input power supply.

[0013] The operating power supply unit may be a DC / DC conversion power supply, the positive input terminal of the DC / DC conversion power supply being connected to the input power supply, and the negative output terminal of the DC / DC conversion power supply being connected to the negative terminal of the input power supply.

[0014] Each of the control modules includes an operating power protection device, one end of which is connected to an operating power line and the other end of which provides operating power to a control circuit board included in the control module. The operating power protection device includes a protection circuit consisting of a self-resettable fuse, a current limiting circuit, or a series connection of a self-resettable fuse and a current limiting circuit.

[0015] A high-side driving circuit is provided on a control circuit board included in the control module and connected to a port of a corresponding operating power supply, and drives an electronic switch transistor in the control module to turn on and off.

[0016] Industrial Applicability The present invention realizes the transmission of input power and operating power to multiple control modules via operating power lines and input power lines simply by arranging at least one operating power unit. There is no need to arrange operating power supplies in all control modules as in the past. The main effects of the system power supply of the present invention are as follows: (1) It is easy to realize miniaturization of the control module. (2) The reliability of the control system is improved. (3) The cost of the control system can be reduced. [Brief description of the drawings]

[0017] [Figure 1] FIG. 2 is a schematic diagram of the structural principle of an embodiment of the present invention; [Diagram 2] 1 is a diagram showing the relative relationship between the system power supply and the operating voltage when the operating power supply of the present invention is in a high side state. [Diagram 3] FIG. 2 is a diagram showing the relative relationship between the system power supply and the operating voltage when the operating power supply of the present invention is in a low-side state. [Figure 4] FIG. 2 is a system connection diagram of two control modules including an operating power supply unit according to the present invention. [Diagram 5] This is a diagram showing the principle of how an operating power supply VCC drives an electronic switch transistor. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] The following provides a clear and comprehensive description of the technical solutions in the embodiments of the present invention in conjunction with the drawings of the embodiments of the present invention. It is clear that the described embodiments are only a part of the embodiments of the present invention, and are not all of the embodiments. Based on the embodiments of the present invention, all other embodiments that can be obtained by those skilled in the art without any creative efforts are included in the protection scope of the present invention.

[0019] The system power supply includes an input power supply VB, four control modules 3, 4, 5 and 6, and a wire harness 2. The wire harness 2 includes an operating power supply line 21 and an input power supply line 22. The operating power supplies of the control modules are connected by an operating power supply port 7, and the input power supplies are connected by an input power supply port 8. The operating power supply port 7 is connected to the operating power supply line 21, the input power supply port 8 is connected to the input power supply line 22, and the input power supply VB is connected to the input power supply line 22. The self-resettable fuse 44 disposed on the control circuit board 47 has one end connected to the operating power supply port 7 and the other end applied to an inlet point 48 of the control circuit board of the control module. In the four control modules 3, 4, 5 and 6, the control module 3 includes an operating power supply unit 1. The input end of the operating power supply unit 1 is connected to the input power supply VB. The output end of the operating power supply unit 1 outputs an operating power supply VCC and is connected to the operating power supply line 21.

[0020] As shown in Figure 1, the input power source VB is a battery power source. In certain vehicle configurations, the input power source may be provided by other power sources without the use of a battery power source. For example, in an electric vehicle, the input power source may be provided by a power battery.

[0021] As shown in Fig. 1, the operating power supply unit 1 includes an isolated DC / DC power supply and a self-resettable fuse 11. A positive input terminal T2 of the isolated DC / DC power supply is connected to an input power supply VB. A negative input terminal T1 of the isolated DC / DC power supply is connected to GND (power supply ground or body earth). A positive input terminal T3 of the isolated DC / DC power supply is connected to an operating power supply port 7 via the self-resettable fuse 11. A negative input terminal T4 and a positive input terminal T2 of the isolated DC / DC power supply are connected to an input power supply port 8.

[0022] When the isolated DC / DC power supply is replaced with a DC / DC conversion power supply, the positive input terminal T2 of the DC / DC conversion power supply is connected to the input power supply VB, the negative input terminal T1 of the DC / DC conversion power supply is connected to GND, the positive input terminal T3 is connected to the operating power supply port 7 via the self-resettable fuse 11, and the negative input terminal T4 is connected to the negative input terminal T1 and shares GND (body earth).

[0023] The control modules 4, 5 and 6 do not include an operating power supply unit, and their operating power supply is provided by an operating power supply line 21. An operating power supply protection device is disposed in each control module. The operating power supply protection device includes a protection circuit consisting of a self-resettable fuse, a current limiting circuit, or a series connection of a self-resettable fuse and a current limiting circuit.

[0024] FIG. 2 is a diagram showing the relationship between the levels of the operating power supply VCC and the input power supply VB converted by an isolated DC / DC power supply.

[0025] FIG. 3 is a diagram showing the relationship between the levels of the operating power supply VCC converted by the DC / DC conversion power supply and the input power supply VB.

[0026] As shown in Fig. 4, among the four control modules 3, 4, 5 and 6, the control modules 4 and 6 include an operating power supply unit. The output terminals of the two operating power supply units are connected in series with diodes D2 and D4, respectively. The purpose of providing two operating power supply units is to expand the power supply capacity and improve the reliability of the system.

[0027] In some control systems, the operating power supply unit is arranged independently so that maintenance of the operating power supply or provision of an operating power supply device can be easily performed. Here, a principle diagram and description are omitted.

[0028] In this embodiment, the operating power supply VCC comprehensively selects the level amplitude of VCC and the control electrode conduction level amplitude of the electronic switch transistor (usually referred to as an N-type MOS transistor) when the process is performed, so that the operating power supply VCC meets the operating power requirement of the control module and also meets the control voltage requirement for the control module to drive the N-type MOS transistor.

[0029] 5, the control circuit board 47 of the control module 4 includes a logic unit 49 and a driving unit 45. The on / off of an electronic switch transistor M1 is controlled by a port D1 of the logic unit 49. The output of the electronic switch transistor M1 is connected to a load of a light bulb LAMP. In addition to the load of the light bulb LAMP, the loads connected to the output of the electronic switch transistor M1 further include primary electrical loads of the vehicle body, such as a motor, an electric heater, etc.

[0030] The principle by which the electronic switch transistor M1 is driven by the control circuit board 47 is as follows. First, when the logic unit 49 outputs a low level to the port D1 (the low level of the logic unit 49 is VB), the triode vacuum tube TVT is turned on, and the operating power connected to the operating power port 7 is turned on by the self-resettable fuse PTC and the triode vacuum tube TVT The voltage is applied to resistor R4 via the self-resettable fuse PTC and triode vacuum tube TVT When the voltage drop is small during normal operation, the control voltage VCC can be considered to be directly applied to the resistor R4, so the electronic switch transistor M1 turns on and operates. When the logic unit 49 outputs a high level to the port D1 (or controls D1 to a high resistance state), the triode vacuum tube TVT is turned off, the input terminal of resistor R4 is pulled low by resistor R3, and the electronic switch transistor M1 is turned off and stops operating.

[0031] In the present invention, the operating power required for the control modules 3, 4, 5 and 6 is provided through the operating power port 7, which satisfies the control requirement for turning on the electronic switch transistors, and further, it is not necessary to arrange a driving power supply, which reduces the cost and simplifies the structure.

[0032] Although the embodiments of the present invention have been described, those skilled in the art can modify, substitute, and change these embodiments without departing from the principles and spirit of the present invention, and therefore the scope of the present invention is limited by the claims and their equivalents.

Claims

1. A system power supply including an input power source, an operating power supply unit, a plurality of control modules, and a wire harness, the wire harness including an operating power supply line and an input power supply line, and in each of the plurality of control modules, an input power supply port is connected to the input power supply line, an operating power supply port is connected to the operating power supply line, the input power source is connected to the input power supply line, and an output of the operating power supply unit is connected to the operating power supply line; The input of the operating power supply unit is an input power supply or an externally connected power supply; The operating power supply unit is an isolated DC / DC power supply, the positive input terminal of the isolated DC / DC power supply is connected to the input power supply, and the negative output terminal of the isolated DC / DC power supply is connected to the positive terminal of the input power supply; A system power supply characterized in that the operating power supply unit is a DC / DC conversion power supply, the positive input terminal of the DC / DC conversion power supply is connected to the input power supply, and the negative output terminal of the DC / DC conversion power supply is connected to the negative terminal of the input power supply.

2. 2. The system power supply of claim 1, wherein the input power source is a battery.

3. 2. The system power supply of claim 1, wherein at least one of said plurality of control modules includes said operating power supply unit.

4. 2. The system power supply according to claim 1, wherein at least two of the operating power supply units are provided, and the output terminal of each of the operating power supply units is connected in series to a diode and then connected to a control power supply line.

5. 2. The system power supply according to claim 1, wherein each of the plurality of control modules includes an operating power protection device, one end of the operating power protection device is connected to the operating power line and the other end of the operating power protection device provides operating power to a control circuit board included in the control module, and the operating power protection device includes a protection circuit consisting of a self-resettable fuse, a current limiting circuit, or a series connection of a self-resettable fuse and a current limiting circuit.

6. 2. The system power supply according to claim 1, wherein the operating power supply unit is configured such that the level amplitude of the operating power supply VCC meets the operating power supply requirements of the control module and also meets the control voltage requirements for driving the N-type MOS transistor of the control module, and the control voltage amplitude of the operating power supply VCC and the control electrode conduction level amplitude of the electronic switch transistor are selected.

7. The system power supply described in Claim 1, characterized in that the control circuit board included in the control module includes a logic unit and a drive unit, the on / off of the electronic switch transistor M1 is controlled by a port D1 of the logic unit, and the output of the electronic switch transistor M1 is connected to a load.

8. 2. The system power supply according to claim 1, wherein a control circuit board included in the control module is provided with a high side drive circuit connected to a port of a corresponding operating power supply, and the high side drive circuit drives an electronic switch transistor inside the control module to be turned on and off.

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