Novel brake assisting system with power supply controller for electric automobile

Abstract

The utility model relates to an electric vehicle brake assisting system, in particular to a novel electric vehicle brake assisting system with a power supply controller. The system comprises a brake pedal, a vacuum pump, a vacuum pump controller, a vacuum tank with a sensor, a hydraulic brake system, an instrument and a power supply controller, the power supply controller adopts vehicle ON power for output power supply and adopts vehicle constant power for transient guarantee power supply, the constant power and the ON power are arranged in parallel, and a vacuum pump controller internal switch is arranged on the constant power; an MCU connected to ON power and constant power is arranged in the power supply controller, a P-point connecting end and an N-point connecting end are arranged on the MCU, the P-point connecting end is electrically connected to the ON power and the constant power, a voltage amplification circuit is arranged on the P-point connecting end, and an R is arranged on the voltage amplification circuit; the N-point connecting end is provided with an optocoupler mos circuit which is connected with a vacuum pump controller, and the vacuum pump controller controls closing to enable the vacuum pump to work. The brake assisting system can still work normally when the vehicle is powered off abnormally.

Description

Technical Field

[0001] The utility model relates to an electric vehicle brake boosting system, in particular to a novel electric vehicle brake boosting system with a power supply controller. Background Art

[0002] As we all know, among all the major systems in a car, the brake system is an important system related to personal safety. This system must ensure low failure rate and high safety. In the brake system, the power assist system is particularly important. There are three commonly used power assist sources in electric vehicles: vacuum pump, air pump and oil pump. Air pumps and oil pumps are large in size, heavy, noisy and consume a lot of energy, so vacuum assist is widely used in passenger cars.

[0003] At present, the power-assisting systems used in electric vehicles on the market are all powered by a single power supply. Taking the air pump power-assisting form as an example, once the vehicle fails or the high and low voltages of the vehicle are abnormally cut off during driving, and due to the limited capacity of the gas tank, when the air pump is not working, the power-assisting system can only be used by the driver for about two brakes. Therefore, when the vehicle is abnormally powered off, the brake assist system will fail, causing the brake pedal to become heavier, the braking effect to decrease, and even the result of ineffective braking, seriously endangering the driving safety of the vehicle.

[0004] At present, the vacuum-assisted braking systems used in the pure electric vehicle industry are all powered by a single circuit. Once a vehicle failure occurs or the high and low voltages of the vehicle are abnormally cut off during driving, the brake assist system fails, the brake pedal becomes heavier, the braking effect decreases, and even the braking effect becomes ineffective, seriously endangering the driving safety of the vehicle. In addition, the existing assist system is too complicated, and the operation is cumbersome when the system is working normally. In addition, when a failure occurs, it is not convenient to troubleshoot and repair the fault. Utility Model Content

[0005] In order to solve the above-mentioned technical problems, the purpose of the utility model is to provide a new brake assist system for electric vehicles with a power supply controller. When the vehicle is abnormally powered off, the brake assist system can still ensure the normal operation of the assist system. In an emergency, the vehicle can still continue to brake effectively, thereby ensuring driving safety.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0007] A novel brake booster system for electric vehicles with a power supply controller, the brake booster system is composed of a brake pedal, a vacuum pump, a vacuum pump controller, a vacuum tank, a hydraulic brake system, an instrument and a power supply controller; a sensor is provided on the vacuum tank;

[0008] Among them, the power supply controller adopts the vehicle's ON power for output power supply and uses the vehicle's normal power for temporary power supply guarantee. The normal power and the ON power are arranged in parallel, and an internal switch of the vacuum pump controller is arranged on the normal power; the power supply controller is provided with an MCU connected to the ON power and the normal power, and the MCU is provided with a P point connection terminal and an N point connection terminal. The P point connection terminal is electrically connected to the ON power and the normal power, and a voltage amplifier circuit is arranged on the P point connection terminal, and R is arranged on the voltage amplifier circuit; an optocoupler MOS circuit is arranged on the N point connection terminal, and the optocoupler MOS circuit is connected to the vacuum pump controller, and the vacuum pump controller controls the closure to make the vacuum pump work.

[0009] Preferably, the vacuum pump is electrically connected to a parallel circuit of ON power and normal power, and the vacuum pump is connected in parallel to the vacuum tank, and the vacuum tank is electrically connected to the hydraulic brake system, instrument and brake pedal respectively.

[0010] Preferably, the sensor is electrically connected to the instrument and the vacuum pump.

[0011] In summary, the advantages of the utility model are as follows:

[0012] 1. The power supply controller detects the vehicle power-on status. When the vehicle power is abnormally cut off, the power-assist system can still supply power normally.

[0013] 2. When the vehicle is powered off normally, the vacuum pump works for protection; when there is only normal power, when the power supply controller is powered off from ON power, the power supply controller works for 3 minutes and then the active output of the power supply controller can be turned off to stop the vacuum pump from working. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the topology diagram of the new brake assist system;

[0015] Figure 2 This is the schematic diagram of the power supply controller;

[0016] Figure numerals: 1. brake pedal; 2. vacuum tank; 3. sensor; 4. vacuum pump; 5. instrument; 6. hydraulic brake system; 7. power supply controller; 8. vacuum pump controller; 9. internal switch of vacuum pump controller; 10. ON power; 11. normal power; 12. MCU; 13. P point connection terminal; 14. N point connection terminal; 15. voltage amplifier circuit; 16. R; 17. optocoupler MOS circuit. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0018] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0019] It should also be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition and explanation in subsequent drawings.

[0020] The specific implementation of the utility model is described in detail below in conjunction with the accompanying drawings.

[0021] like Figure 1 to Figure 2 As shown, this utility model patent is a new type of electric vehicle brake assist system with a power supply controller. It adopts a simple electric vehicle braking system, which consists of a brake pedal 1, a vacuum pump 4, a vacuum pump controller 8, a vacuum tank 2 with a sensor 3, a hydraulic brake system 6, an instrument 5 and a power supply controller 7.

[0022] The vacuum pump 4 is electrically connected to the parallel circuit of the vehicle ON power 10 and the vehicle normal power 11, and the vacuum pump 4 is connected in parallel to the vacuum tank 2, and the vacuum tank 2 is electrically connected to the hydraulic brake system 6, the instrument 5 and the brake pedal 1. A sensor 3 is provided on the vacuum tank 2, and the sensor 3 is electrically connected to the instrument 5 and the vacuum pump 4.

[0023] like Figure 1 to Figure 2 As shown, when the vehicle is working normally with the ON power 10, a person steps on the brake pedal 1, the power assist system works, and the vehicle is braked through the hydraulic brake system 6. When the sensor 3 detects that the vacuum degree of the vacuum tank 2 is lower than a certain value, the sensor 3 enables the vacuum pump 4 to work; wherein, the vacuum pump 4 is powered by the ON power 10, and the power supply controller 7 is always powered by the normal power 11.

[0024] At this time, the power supply controller 7 can sample the voltage at both ends of R16, and the voltage at both ends of R16 is V1. The voltage is amplified to V2, that is, the voltage at point P, through the voltage amplifier circuit 15. The power supply controller 7 MCU12 sets the voltage range Vo-Vh. When the voltage at point P is lower than Vo, it is abnormal; when the vehicle is powered on normally, V2 is within the range of Vo-Vh, and MCU12 does not act. When the vehicle is powered off abnormally, the voltage at both ends of R16 is 0, the voltage at point P is 0, and the voltage is lower than Vo. MCU12 detects that point P is at a low level, and immediately enables at point N, controls the optocoupler MOS circuit 17, and enables the power supply controller 7 to perform active output. Through the vacuum pump controller 8, the internal switch 9 of the vacuum pump controller is attracted, and the vacuum pump 4 works. After the vehicle is powered off abnormally, the power assist system can still be powered normally. Among them, the vacuum pump controller 8 can be a relay.

[0025] In order to prevent the vacuum pump 4 from still working through the power supply controller 7 when the vehicle is powered off normally, the power supply controller 7 is set to work normally when both the ON power 10 and the normal power 11 exist. When only the normal power 11 is present, the power supply controller 7 is powered off from the ON power 10, and the power supply controller 7 works for 3 minutes to turn off the active output of the power supply controller 7, so that the vacuum pump 4 stops working. The ON power 10 is only used as a condition for the power supply controller 7 to judge the working state, and does not provide power.

[0026] The key technical points of this patent are:

[0027] 1. The power supply controller 7 detects the vehicle power ON 10. When the vehicle power is abnormally cut off, the power assist system can still supply power normally.

[0028] 2. When the vehicle is powered off normally, the vacuum pump 4 works for protection; when there is only normal power 11, when the controller is powered off from the ON power 10, the controller works for 3 minutes to turn off the active output of the power supply controller 7, so that the vacuum pump 4 stops working.

[0029] The above is a description of the embodiments of the utility model. Through the above description of the disclosed embodiments, professionals and technicians in the field can implement or use the utility model. Various modifications to these embodiments will be obvious to professionals and technicians in the field. The general principles defined in this article can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to these embodiments shown in this article, but will conform to the widest range consistent with the principles and novelties disclosed in this article.

Claims

1. A novel brake booster system for electric vehicles with a power supply controller, characterized in that: The brake booster system comprises a brake pedal (1), a vacuum pump (4), a vacuum pump controller (8), a vacuum tank (2), a hydraulic brake system (6), an instrument (5) and a power supply controller (7); a sensor (3) is provided on the vacuum tank (2); The power supply controller (7) uses the vehicle ON power (10) for output power supply and uses the vehicle normal power (11) for temporary power supply guarantee. The normal power (11) is arranged in parallel with the ON power (10), and a vacuum pump controller internal switch (9) is arranged on the normal power (11); the power supply controller (7) is provided with an MCU (12) connected to the ON power (10) and the normal power (11), and the MCU (12) is provided with a P point connection terminal (13) and an N point connection terminal (14), the P point connection terminal (13) is electrically connected to the ON power (10) and the normal power (11), and the P point connection terminal (13) is provided with a voltage amplifier circuit (15), and R (16) is arranged on the voltage amplifier circuit (15); an optical coupler MOS (17) circuit is provided on the N point connection terminal (14), and the optical coupler MOS (17) circuit is connected to the vacuum pump controller (8), and the vacuum pump controller (8) controls the closing to make the vacuum pump (4) work.

2. A novel electric vehicle brake booster system with a power supply controller according to claim 1, characterized in that: The vacuum pump (4) is electrically connected to a parallel circuit of ON power (10) and normal power (11), and the vacuum pump (4) is connected in parallel to the vacuum tank (2), and the vacuum tank (2) is electrically connected to the hydraulic brake system (6), the instrument (5) and the brake pedal (1) respectively.

3. A novel electric vehicle brake booster system with a power supply controller according to claim 2, characterized in that: The sensor (3) is electrically connected to the instrument (5) and the vacuum pump (4).

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