CN102673421A - Method for switching sleep mode and wakeup mode of electric vehicle control unit and realization circuit thereof - Google Patents
Method for switching sleep mode and wakeup mode of electric vehicle control unit and realization circuit thereof Download PDFInfo
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Abstract
The invention relates to a method for switching a sleep mode and a wakeup mode of an electric vehicle control unit and a realization circuit thereof. The circuit comprises a vehicle 12V low-voltage battery supply, a main chip main core power supply and a controller input/output port (I/O) power supply, wherein the vehicle 12V low-voltage battery supply comprises the main chip main core power supply and the I/O power supply; the main chip main core power supply is used for powering a main chip main core of the vehicle control unit; and the I/O power supply is used for powering the input and the output of the vehicle control unit.
Description
Technical field
The present invention relates to a kind of method and realization circuit thereof of realizing that dormancy of battery-driven car entire car controller and awakening mode switch.
Background technology
The battery-driven car entire car controller needs the state of monitoring electrokinetic cell after key switch is closed; When especially charging to the detection of battery load state and state of health; If let entire car controller be in normal mode of operation always, will certainly consume the energy of low pressure baby battery excessively, so; A kind of low-power consumption mode that the battery-driven car entire car controller utilizes chip itself to provide; After key switch was closed, chip got into the low-power consumption park mode, and can wake chip up with monitoring electrokinetic cell state through hardware interrupts.
Summary of the invention
The object of the present invention is to provide a kind of method and realization circuit thereof of realizing that dormancy of battery-driven car entire car controller and awakening mode switch; The master chip of controller is according to the automatic switchover dormancy of peripheral hardware hardware interrupts and wake two kinds of patterns up; Thereby guarantee under charge condition; Entire car controller is operated under the super low-power consumption pattern, monitors the state of electrokinetic cell.The benefit of doing like this: after the car load key is closed; Effectively reduce the electric consumption of using of entire car controller; Guarantee that car load low pressure lead-acid battery the feed phenomenon can not occur, both prolonged the life-span of plumbic acid baby battery, stopped the complete vehicle fault phenomenon of bringing because of the baby battery feed again.
Master chip master nuclear-electric power supply and I/O power supply independent operating; Master chip is through the ignition key switch signal; Charging connects signal, after CAN interrupts waking up, controls the switchover operation of these two power supplys voluntarily; And an external hardware timer circuit also can timing wake-up be in master chip under the dormant state, makes it recover normal mode of operation.
Through the key switch input, RC regularly discharges and recharges, and charging connects the signal input; CAN interrupts the hardware interrupts of wake-up trigger chip; Wake master chip up, freely switch two independent 5V power supply, realize the switching of controller normal operation and park mode; After the controller monitoring whole vehicle state finishes, get into dormant state once more.
Battery-driven car is under the pattern that cruising and battery fill soon, and entire car controller also will work under the normal mode, is used to monitor car load driving and charge condition; The battery-driven car ignition key switch is in " shut " mode" or battery is under the charging battery pattern and work as, and entire car controller need work in park mode, and all input/output ports of controller are not worked; Also the work power consumption of stop pattern (even crystal oscillator is not worked yet) controller of master chip reaches a microampere rank; And can interval 10 minutes timing wake master chip up through the hardware timing circuit, at this time the of short duration recovery of controller is normal, detects trickle charge state down; All are normal, continue dormancy.
The master chip of controller to be according to peripheral hardware demand this two kinds of patterns that automatically switch, thereby guarantees that under charge condition, entire car controller is operated under the super low-power consumption pattern, monitors the state of electrokinetic cell.The benefit of doing like this: after the car load key is closed; Effectively reduce the electric consumption of using of entire car controller; Guarantee that car load low pressure lead-acid battery the feed phenomenon can not occur, both prolonged the life-span of plumbic acid baby battery, stopped the complete vehicle fault phenomenon of bringing because of the baby battery feed again.
Concrete technical scheme is following:
A kind of realization circuit of realizing the method that dormancy of battery-driven car entire car controller and awakening mode switch; Comprise car load 12V A-battery power supply; Master chip master nuclear-electric power supply and controller IO port I/O power supply; Said car load 12V A-battery power supply is divided into master chip master nuclear-electric power supply and I/O power supply two-way power supply, and wherein said master chip master nuclear-electric power supply is used for examining power supply to the master chip master of entire car controller, and said I/O power supply is used for the input and output power supply to entire car controller.
Further, also comprise filter, car load 12V A-battery power supply is divided into master chip master nuclear-electric power supply and I/O power supply two-way power supply through behind the filter.
Further, also comprise two MOSFET switch Q1 and Q2, it is used for controlling respectively conducting master chip master's nuclear-electric power supply and I/O power supply two-way power supply.
Further, master chip master nuclear-electric power supply and I/O power supply are separate 5V power supply 5V_digital_core and 5V_Digital_I/O of two-way.
Further; Also be provided with a RC oscillating circuit in the entire car controller; It is used for the charge of a capacitor that the interior power supply of controller is given wake-up circuit; Wake-up circuit is raise to the output voltage of controller chip pin, interrupt, wake chip up and recover normal mode of operation through the skip signal triggering of controller chip input pin.
A kind of method that realizes that dormancy of battery-driven car entire car controller and awakening mode switch, further, it adopts above-mentioned realization circuit, and adopts following algorithm,
(1) park mode and an awakening mode of definition entire car controller;
(2) be in awakening mode following time when entire car controller, the two-way power supply of said realization circuit all has;
(3) be in park mode following time when entire car controller, said master chip master nuclear-electric power supply has electricity, and said controller IO port I/O power supply does not have;
(4) under park mode, the master chip of controller gets into the super low-power consumption pattern, and the power consumption of entire car controller is 10 microamperes of ranks, guarantees car load low potential source power shortage not for a long time.
Further, when entire car controller is in park mode following time, following four kinds of situation can be waken controller up:
A. dynamic battery charge connects signal, and battery-driven car gets into the charging battery pattern; Or
B. key switch restarts, and the ignition key signal is arranged; Or
C. other controller of car load carries out communication through CAN and wakes up through the CAN wake-up signal; Or
D. be provided with a timing circuit, come timing wake-up through timing circuit.
Further,
Said situation a is specially: when car load will charge, one of the battery charger output level signal of the conversion master chip of giving entire car controller from high to low woke it up; Or,
Said situation b is specially: when key switch restarts; Ignition unblanking power supply normal mode of operation is worked to the two-way power supply of master chip power supply, simultaneously simultaneously; Ignition signal high level signal is input to controller as digital quantity; After the digital quantity signal processing of circuit, be input to the wake module of master chip, master chip gets into mode of operation from park mode;
Said situation c is specially: other controller on the CAN network sends the CAN signal and wakes entire car controller up, make it work in normal mode, and the power supply of the power supply of CAN transceiver and master chip is a same road power supply;
Said situation d is specially: RC oscillating circuit of controller indoor design; Power supply is given the charge of a capacitor in the wake-up circuit in the controller; Wake-up circuit is raise to the output voltage of controller chip pin; Skip signal through the controller chip input pin triggers interruption, wakes chip up and recovers normal mode of operation.
Further, among the situation d, before the charge of a capacitor in giving wake-up circuit,, during discharge, be output port with the cooresponding triggering pin configuration of controller chip, and level is low earlier with this capacitor discharge.
Further, adopt following steps:
1) battery-driven car is under the pattern that cruising and battery fill soon, and entire car controller also works under the normal mode, is used to monitor car load driving and charge condition;
2) be in " shut " mode" or battery is under the charging battery pattern when the battery-driven car ignition key switch, entire car controller works in park mode, and all input/output ports of controller are not worked, and also the work power consumption of stop mode controller of master chip reaches a microampere rank;
3) wake master chip up through hardware timing circuit interval 10 minutes timing;
4) the of short duration recovery of entire car controller after waking up is normal, and detects trickle charge state down;
5) all are normal when testing result, and then entire car controller continues to get into dormant state.
Compare with present prior art, the ignition key of battery-driven car of the present invention is in off position the time, and controller can be waken up through following several kinds of modes.1: power battery charging connects signal; 2: other controller of car load is through the CAN wake-up signal; 3: the ignition key signal.The present invention is through the key switch input, and RC regularly discharges and recharges, and charging connects the signal input; CAN interrupts the hardware interrupts of wake-up trigger chip; Wake master chip up, freely switch two independent 5V power supply, realize the switching of controller normal operation and park mode; After the controller monitoring whole vehicle state finishes, get into dormant state once more.Effect: after the car load key is closed, effectively reduce the electric consumption of using of entire car controller, guarantee that car load low pressure lead-acid battery the feed phenomenon can not occur, both prolonged the life-span of plumbic acid baby battery, stopped the complete vehicle fault phenomenon of bringing because of the baby battery feed again
Description of drawings
Fig. 1 is a circuit diagram of the present invention--the two independent power circuit
Fig. 2 is a circuit diagram of the present invention--wake-up master chip circuit
The specific embodiment
Describe the present invention according to accompanying drawing below, it is a kind of preferred embodiment in the numerous embodiments of the present invention.
As shown in Figure 1, the positive pole of the little lead-acid battery of car load low pressure connects the positive pole of entire car controller low potential source, and negative pole connects the ground of entire car controller.The power supply of baby battery is divided into two-way, controls by Q1 and Q2 respectively, and MOSFET Q1 conducting, Q2 turn-offs, the chip normal operation, power supply 5V_Digital_Core and 5V_Digital_I/O get; MOSFET Q1 turn-offs, the Q2 conducting, and 5V_Digital_Core gets electric, the 5V_Digital_I/O dead electricity, chip operation is under low-power consumption mode.When ignition key switch Ignition gets to the position of On, aerotron S1 conducting, P type MOSFET Q1 conducting, the controller normal operation, master chip output high level Keep_live signal is to realize the power supply auto-lock function.
Shown in Fig. 2; There are three outward signs to be input to the interrupt module of master chip; After as long as master chip detects the hardware interrupt pulse of wherein any one level saltus step, master chip just from the sleep state mode switch to mode of operation, enable the keeplive signal simultaneously; Make the power module normal operation, 5V_Digital_Core and 5V_Digital_I/O get.First interrupt signal actv. condition is level saltus step from low to high, and second interrupt signal actv. condition is level transition from high to low, and the 3rd interrupt signal actv. condition is level saltus step from low to high.First interrupt source signal is the RC oscillating circuit, and during the RC charging, the frequency pin Interrupt1_wake_up of master chip is configured to input; When the level of capacitor C reaches the limit value of high level; Hardware interrupts of master chip record, interrupt counter adds one simultaneously, when counting machine is added to limit value; Master chip is jumped out sleep pattern, gets into mode of operation.Second interrupt source signal is that charger connects useful signal; When charger does not link to each other with car load high pressure wire harness; The 5V level is input to master chip through pull-up resistor R3, in case when charger links to each other with car load, export a low level signal; When master chip pin Interrupt2_wake_up detected from high to low pulse of level, hardware interrupts made master chip enter into mode of operation by sleep pattern.The 3rd interrupt source signal is the key switch signal; When it switches the state of on by the off state; When master chip pin Interrupt3_wake_up detected the pulse that level changes from low to high, hardware interrupts made master chip enter into mode of operation by sleep pattern.After controller is accomplished the task of regulation, chip keeplive signal output low level, off switch Q1, the I/O power remove of controller, chip gets into sleep pattern again, thereby has reduced the power consumption of controller.
Design of the present invention is at first based on the super low-power consumption pattern thought of master chip, again by the power circuit of uniqueness and chip wake-up trigger junction circuit as support, accomplish by software algorithm at last.Master chip has two kinds of mode of operations: normal mode of operation and super low-power consumption pattern.Under the super low-power consumption pattern: all power down of peripheral hardware that master chip is all, have only in-to-in RAM and low frequency crystal oscillator to power on, power consumption is less than 50 microamperes.
The battery-driven car entire car controller is realized method and the realization circuit that dormancy and awakening mode switch, and the 5V digital quantity power supply of entire car controller is divided into two-way, and one the tunnel is to the power supply of master chip nuclear, and another road is the input and output power supply to controller.This two-way power supply all has electricity under the awakening mode, and the first via has electricity under the park mode, and the second the tunnel does not have.Under park mode, the master chip of controller gets into the super low-power consumption pattern, and the power consumption of entire controller has only 10 microamperes rank, guarantees car load low potential source power shortage not for a long time.After controller chip gets into park mode, there are four kinds of situation to wake controller up.First kind of situation: battery-driven car gets into the charging battery pattern; Second kind of situation: key switch restarts; The third situation: wake up through the CAN communication; The 4th kind of situation: wake up through timing circuit.Car load 12V A-battery power supply is through behind the filter; Be divided into two-way; Two MOSFET switch Q1 and Q2 control conducting is arranged respectively, and during vehicle launch, ignition key switch triggers the Q1 conducting; The power supply 5V_digital_core of master chip and controller IO port power supply 5V_Digital_I/O have electricity, and MOSFET switch Q2 automatically shuts down.When vehicle stopped working, ignition key switch was closed, and MOSFET Q1 can not conducting, the automatic conducting of MOSFET Q2, and the power supply 5V_digital_core of master chip powers on, and the 5V_Digital_I/O automatic power down.Be input to through the conversion of hardware level signal to trigger on the pin of master chip and interrupt so that master chip switches to normal mode from low-power consumption mode.Method one is: when car load will charge, one of battery charger output is the level signal of the conversion master chip of giving entire car controller from high to low, wakes it up.Method two is: when key switch restarts; Ignition unblanking power supply normal mode of operation is worked to the two-way power supply of master chip power supply, simultaneously simultaneously; Ignition signal high level signal is input to controller as digital quantity; After the digital quantity signal processing of circuit, be input to the wake module of master chip, master chip gets into mode of operation from park mode.Method three is: controller is under the state of dormancy, and other controller on the CAN network sends the CAN signal and wakes entire car controller up, makes it work in normal mode.Characteristics: the power supply of CAN transceiver and the power supply of master chip are same road power supplys.Method four is: RC oscillating circuit of controller indoor design; Power supply is given the charge of a capacitor in the wake-up circuit in the controller; Wake-up circuit is raise to the output voltage of controller chip pin; Skip signal through the controller chip input pin triggers interruption, wakes chip up and recovers normal mode of operation.Giving before the charge of a capacitor in the wake-up circuit, earlier with this capacitor discharge, during discharge, be output port with the cooresponding triggering pin configuration of controller chip, and level is low.
Combine accompanying drawing that the present invention has been carried out exemplary description above; Obviously the concrete realization of the present invention does not receive the restriction of aforesaid way; As long as the various improvement of having adopted method design of the present invention and technical scheme to carry out; Or directly apply to other occasion without improvement, all within protection scope of the present invention.
Claims (10)
1. realization circuit of realizing the method that the dormancy of battery-driven car entire car controller and awakening mode switch; It is characterized in that; Comprise car load 12V A-battery power supply, master chip master nuclear-electric power supply and controller IO port I/O power supply, said car load 12V A-battery power supply is divided into master chip master nuclear-electric power supply and I/O power supply two-way power supply; Wherein said master chip master nuclear-electric power supply is used for examining power supply to the master chip master of entire car controller, and said I/O power supply is used for the input and output power supply to entire car controller.
2. realize the realization circuit of the method that dormancy of battery-driven car entire car controller and awakening mode switch according to claim 1; It is characterized in that; Also comprise filter, car load 12V A-battery power supply is divided into master chip master nuclear-electric power supply and I/O power supply two-way power supply through behind the filter.
3. realize the realization circuit of the method that dormancy of battery-driven car entire car controller and awakening mode switch according to claim 1 or claim 2; It is characterized in that; Also comprise two MOSFET switch Q1 and Q2, it is used for controlling respectively conducting master chip master's nuclear-electric power supply and I/O power supply two-way power supply.
4. the realization circuit of the method for switching like each said realization battery-driven car entire car controller dormancy and awakening mode among the claim 1-3; It is characterized in that master chip master nuclear-electric power supply and I/O power supply are separate 5V power supply 5V_digital_core and 5V_Digital_I/O of two-way.
5. the realization circuit of the method for switching like each said realization battery-driven car entire car controller dormancy and awakening mode among the claim 1-4; It is characterized in that; Also be provided with a RC oscillating circuit in the entire car controller, it is used for, and power supply makes wake-up circuit raise to the output voltage of controller chip pin to the charge of a capacitor of wake-up circuit in the controller; Skip signal through the controller chip input pin triggers interruption, wakes chip up and recovers normal mode of operation.
6. a method that realizes that dormancy of battery-driven car entire car controller and awakening mode switch is characterized in that it adopts the described realization circuit of claim 1-5, and adopts following algorithm,
(1) park mode and an awakening mode of definition entire car controller;
(2) be in awakening mode following time when entire car controller, the two-way power supply of said realization circuit all has;
(3) be in park mode following time when entire car controller, said master chip master nuclear-electric power supply has electricity, and said controller IO port I/O power supply does not have;
(4) under park mode, the master chip of controller gets into the super low-power consumption pattern, and the power consumption of entire car controller is 10 microamperes of ranks, guarantees car load low potential source power shortage not for a long time.
7. the method for switching like the entire car controller dormancy of the said realization battery-driven car of claim 6 and awakening mode is characterized in that, when entire car controller is in park mode following time, following four kinds of situation can be waken controller up:
A. dynamic battery charge connects signal, and battery-driven car gets into the charging battery pattern; Or
B. key switch restarts, and the ignition key signal is arranged; Or
C. other controller of car load carries out communication through CAN and wakes up through the CAN wake-up signal; Or
D. be provided with a timing circuit, come timing wake-up through timing circuit.
8. like the method for claim 6 or 7 said realization battery-driven car entire car controller dormancy and awakening mode switching, it is characterized in that,
Said situation a is specially: when car load will charge, one of the battery charger output level signal of the conversion master chip of giving entire car controller from high to low woke it up; Or,
Said situation b is specially: when key switch restarts; Ignition unblanking power supply normal mode of operation is worked to the two-way power supply of master chip power supply, simultaneously simultaneously; Ignition signal high level signal is input to controller as digital quantity; After the digital quantity signal processing of circuit, be input to the wake module of master chip, master chip gets into mode of operation from park mode;
Said situation c is specially: other controller on the CAN network sends the CAN signal and wakes entire car controller up, make it work in normal mode, and the power supply of the power supply of CAN transceiver and master chip is a same road power supply;
Said situation d is specially: RC oscillating circuit of controller indoor design; Power supply is given the charge of a capacitor in the wake-up circuit in the controller; Wake-up circuit is raise to the output voltage of controller chip pin; Skip signal through the controller chip input pin triggers interruption, wakes chip up and recovers normal mode of operation.
9. the method for switching like each said realization battery-driven car entire car controller dormancy and awakening mode among the claim 6-8; It is characterized in that, among the situation d, before the charge of a capacitor in giving wake-up circuit; Earlier with this capacitor discharge; During discharge, be output port with the cooresponding triggering pin configuration of controller chip, and level is low.
10. the method for switching like each said realization battery-driven car entire car controller dormancy and awakening mode among the claim 6-9 is characterized in that, adopts following steps:
1) battery-driven car is under the pattern that cruising and battery fill soon, and entire car controller also works under the normal mode, is used to monitor car load driving and charge condition;
2) be in " shut " mode" or battery is under the charging battery pattern when the battery-driven car ignition key switch, entire car controller works in park mode, and all input/output ports of controller are not worked, and also the work power consumption of stop mode controller of master chip reaches a microampere rank;
3) wake master chip up through hardware timing circuit interval 10 minutes timing;
4) the of short duration recovery of entire car controller after waking up is normal, and detects trickle charge state down;
5) all are normal when testing result, and then entire car controller continues to get into dormant state.
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