A novel circuit for vehicle controller brownout delay

Abstract

The application discloses a novel circuit for vehicle controller delay power-off, and relates to the technical field of vehicle controller circuits, which comprises a whole vehicle power supply module and a control panel power supply module, the whole vehicle power supply module is electrically connected with the control panel power supply module through a power supply wire, and a second relay and a whole vehicle key ON block module are connected in series on a power supply loop of the whole vehicle power supply module and the control panel power supply module; the whole vehicle power supply module is electrically connected with the control panel power supply module through another power supply wire, and a first relay is connected in series on another power supply loop of the whole vehicle power supply module and the control panel power supply module; the circuit further comprises a single-chip microcomputer I / O port and a key ON block state monitoring circuit; the single-chip microcomputer I / O port is electrically connected with the first relay through an optical coupling isolation driving module (3); and the key ON block state monitoring circuit is connected on the power supply loop of the whole vehicle power supply module and the control panel power supply module.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle controller circuit, in particular to a novel circuit for vehicle controller delay power-off. BACKGROUND

[0002] Hydrogen fuel cell is an important part of the current new energy development field, with the continuous expansion of the national hydrogen energy demonstration city group, more and more hydrogen fuel cell vehicles are put into the market, because hydrogen fuel stack adopts the way of electrochemical reaction to convert hydrogen into electric energy, water will be produced in the working process of the stack, in the normal working process, these water will be discharged with the remaining air. But before the stack is powered off, the water generated in the reaction inside the stack must be completely purged to avoid ice blockage due to low temperature. The freeze-thaw process also accelerates the physical damage of proton membrane. At the same time, the hydrogen fuel cell BOP system needs to work for a certain time before the stack is powered off, so as to completely react the residual hydrogen and air in the stack air duct, avoiding local hydrogen and oxygen interpenetration and burning the catalyst layer on the surface of the catalyst.

[0003] Due to the above reasons, for the vehicle equipped with hydrogen fuel stack, the driver needs to purge and discharge the stack before the vehicle is powered off, and the process time is determined by the size of the stack power, which is about 5 minutes. Therefore, the driver needs to continue working for a period of time before stopping driving, and the system can be completely powered off after the purging and discharging process is completed, which brings great inconvenience to the driver. The controller needs to provide self-control delay power-off to avoid the driver from being unable to immediately power off due to the characteristics of the fuel cell. At present, the delay power-off of the fuel cell usually adopts the following ways: using independent power distribution module, which has the disadvantages of high cost and difficult adjustment of vehicle wire harness. Using the standby power mode of the controller part circuit, which has the disadvantages of large static power consumption and certain safety hazards of incomplete power-off. Using special power management chip, which has the advantages of good control, but the cost is high, and most of the power management chips are imported products, which has certain uncertainty in supply. SUMMARY

[0004] The purpose of the present application is to provide a novel circuit for vehicle controller delay power-off to solve the above problems in the prior art.

[0005] In order to achieve the above purpose, the present application provides the following technical scheme: a novel circuit for vehicle controller delay power-off, comprising a vehicle power supply module and a control board power supply module,

[0006] The vehicle power supply module is electrically connected to the control board power supply module through a power supply wire, and a second relay and a vehicle key ON position module are connected in series on one power supply circuit between the vehicle power supply module and the control board power supply module.

[0007] The vehicle power supply module is electrically connected to the control board power supply module through another power supply wire, and a first relay is connected in series on the other power supply circuit between the vehicle power supply module and the control board power supply module.

[0008] It also includes a microcontroller I / O port and a key ON position status monitoring circuit;

[0009] The microcontroller I / O port is electrically connected to the first relay through the optocoupler isolation driver module (3);

[0010] The key ON position status monitoring circuit is connected to one power supply circuit between the vehicle power supply module and the control board power supply module.

[0011] As a further description of the above technical solution: the microcontroller I / O port is the microcontroller I / O port in the original fuel cell controller.

[0012] As a further description of the above technical solution: the operating voltage of the second relay is 24V or 12V.

[0013] As a further description of the above technical solution: the operating voltage of the first relay on the other power supply circuit is 5V.

[0014] As a further description of the above technical solution: the first relay switching signal adopts an optocoupler isolation driver module plus an NPN transistor driving method.

[0015] As a further description of the above technical solution: the key ON position status monitoring circuit adopts an optocoupler isolation circuit.

[0016] In the above technical solution, the novel circuit for delayed power-off of a vehicle controller provided by the present invention has the following beneficial effects:

[0017] The novel circuit for vehicle controller delay power-off is used, when the driver disconnects the whole vehicle key ON block module, the second relay is disconnected, but at this time the first relay is still in the closed state, the control panel power supply module is normally powered, at this time, through the judgment of the key ON state monitoring circuit detection signal, the system needs to enter the power-down process, the fuel cell controller carries out the power-down process of the peripheral accessories, after all the peripheral accessories are normally powered down, the single-chip microcomputer I / O port voltage is high, the output end of the optocoupler isolation drive module is disconnected, and the first relay is disconnected immediately, and finally the control panel power supply module is powered off, through the intelligent control mode of the single-chip microcomputer, another power supply is selected, and the two-way parallel power supply mode is provided, after the whole vehicle key ON block module is disconnected, the power supply selected by the single-chip microcomputer will continue to maintain the power supply of the control panel power supply module, at this time the driver can leave the vehicle, after the system judges that the power-down can be normal, the circuit will automatically disconnect the power supply of the control panel power supply module, since the relay power supply mode is adopted, there is no static power consumption after complete power-off.

[0018] And the novel circuit for vehicle controller delay power-off is simple and reliable in design, the part of the circuit can be added on the original fuel cell controller circuit, so that the intelligent delay power-off function of the control panel power supply module is realized, the demand of the whole vehicle delay power-off after the driver leaves the vehicle is met, the safety risk caused by the system being in the standby power state is avoided, the system adopts the control mode of the single-chip microcomputer and the traditional vehicle relay, has mature application characteristics, reliable architecture design, and high commercial promotion value. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0020] Figure 1 A schematic diagram of a novel circuit for vehicle controller delay power-off is provided for the embodiments of the present application.

[0021] BRIEF DESCRIPTION OF DRAWINGS

[0022] 1, whole vehicle key ON block module; 2, single-chip microcomputer I / O port; 3, optocoupler isolation drive module; 4, first relay; 5, second relay; 6, control panel power supply module; 7, key ON state monitoring circuit; 8, whole vehicle power supply module. DETAILED DESCRIPTION

[0023] In order to make those skilled in the art better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the drawings.

[0024] Please refer to Figure 1 The embodiment of the application provides a technical scheme: a novel circuit for vehicle controller delay power-off, comprising a whole vehicle power supply module 8 and a control panel power supply module 6,

[0025] The whole vehicle power supply module is electrically connected with the control panel power supply module through a power supply wire, and the second relay 5 and the whole vehicle key ON block module 1 are connected in series on a power supply loop of the whole vehicle power supply module and the control panel power supply module;

[0026] The whole vehicle power supply module is electrically connected with the control panel power supply module through another power supply wire, and the first relay 4 is connected in series on another power supply loop of the whole vehicle power supply module and the control panel power supply module;

[0027] Further comprising a single-chip microcomputer I / O port 2 and a key ON block state monitoring circuit 7; the single-chip microcomputer I / O port 2 is electrically connected with the first relay 4 through an optical coupling isolation driving module 3; the key ON block state monitoring circuit 7 is connected on the power supply loop of the whole vehicle power supply module and the control panel power supply module.

[0028] Specifically, after the controller circuit is powered by the whole vehicle key ON block module 1, the second relay 5 is attracted, the control panel power supply module 6 is normally powered, and the system normally works; after working, the voltage of the single-chip microcomputer I / O port 2 is low, at this time, the output end of the optical coupling isolation driving module 3 is turned on, and the first relay 4 is normally attracted; in this state, the first relay 4 and the second relay 5 simultaneously supply power to the control panel power supply module 6; when the driver disconnects the whole vehicle key ON block module 1, the second relay 5 is disconnected, but at this time, the first relay 4 is still in the closed state, the control panel power supply module 6 is normally powered, at this time, the system needs to enter the power-down process through the judgment of the signal detected by the key ON block state monitoring circuit 7, the fuel cell controller carries out the power-down process of the peripheral accessories, after all the peripheral accessories are normally powered down, the voltage of the single-chip microcomputer I / O port 2 is high, the output end of the optical coupling isolation driving module 3 is disconnected, and the first relay 4 is disconnected immediately, and finally the control panel power supply module 6 is powered off; the intelligent control mode of the single-chip microcomputer is adopted to select another power supply after the control panel power supply module 6 is normally powered, a two-way parallel power supply mode is provided, after the whole vehicle key ON block module 1 is disconnected, the power supply selected by the single-chip microcomputer will continue to maintain the power supply of the control panel power supply module 6, at this time, the driver can leave the vehicle, and after the system judges that the normal power-down can be carried out, the circuit will automatically disconnect the power supply of the control panel power supply module 6. Since the relay power supply mode is adopted, there is no static power consumption after complete power-off;

[0029] And the new circuit for vehicle controller delay power-off is simple and reliable, can add this part of circuit on the original fuel cell controller circuit, thereby realizing the intelligent delay power-off function of the control board power supply module 6, meeting the demand of the driver after leaving the car delay power-off, avoiding the safety risk caused by the system being in standby power state all the time, the system adopts the control mode of single-chip microcomputer plus traditional vehicle relay, has mature application characteristics, reliable architecture design, and high commercial promotion value.

[0030] Further, the single-chip microcomputer I / O port 2 is the single-chip microcomputer I / O port in the original fuel cell controller, so as to reduce the use of main control chip.

[0031] One way of the second relay 5 working voltage is 24V or 12V, and the working voltage of the first relay 4 on the other power supply loop is 5V. The whole power supply demand can be set according to the demand.

[0032] The first relay 4 switching signal adopts an optical coupling isolation driving module (3) plus NPN type triode driving mode. The key ON state monitoring circuit 7 adopts an optical coupling isolation circuit.

[0033] The above only describes some exemplary embodiments of the present application by way of illustration, without doubt, for those skilled in the art, the described embodiments can be modified in various ways without departing from the spirit and scope of the present application. Therefore, the above figures and description are illustrative in nature and should not be construed as limiting the scope of the claims of the present application.

Claims

1. A novel circuit for vehicle controller delay power-off, comprising a vehicle power supply module (8) and a control board power supply module (6), characterized in that: the vehicle power supply module is electrically connected with the control board power supply module through a power supply wire, and a second relay (5) and a vehicle key ON block module (1) are connected in series on a power supply loop of the vehicle power supply module and the control board power supply module; the vehicle power supply module is electrically connected with the control board power supply module through another power supply wire, and a first relay (4) is connected in series on another power supply loop of the vehicle power supply module and the control board power supply module; further comprising a single-chip microcomputer I / O port (2) and a key ON block state monitoring circuit (7); the single-chip microcomputer I / O port (2) is electrically connected with the first relay (4) through an optocoupler isolation driving module (3); the key ON block state monitoring circuit (7) is connected on the power supply loop of the vehicle power supply module and the control board power supply module; the single-chip microcomputer I / O port (2) is the original fuel cell controller single-chip microcomputer I / O port; the second relay (5) has a working voltage of 24V or 12V; the first relay (4) on the other power supply loop has a working voltage of 5V; the first relay (4) uses an optocoupler isolation driving module (3) and an NPN triode driving mode; and the key ON block state monitoring circuit (7) uses an optocoupler isolation circuit. ​ ​ ​ ​ ​ 2. A novel circuit for time delay power off of vehicle controller as claimed in claim 1 wherein, ​ 3. A novel circuit for time delay power off of vehicle controller as claimed in claim 1 wherein, ​ 4. A novel circuit for time delay power off of vehicle controller as claimed in claim 1 wherein, ​ 5. A novel circuit for time delay power off of vehicle controller as claimed in claim 1 wherein, ​ 6. A novel circuit for time delay power off of vehicle controller as claimed in claim 1, wherein ​

Images