CN112590686B - Switching management device and switching management method for vehicle-mounted power supply - Google Patents

Switching management device and switching management method for vehicle-mounted power supply Download PDF

Info

Publication number
CN112590686B
CN112590686B CN202011477751.4A CN202011477751A CN112590686B CN 112590686 B CN112590686 B CN 112590686B CN 202011477751 A CN202011477751 A CN 202011477751A CN 112590686 B CN112590686 B CN 112590686B
Authority
CN
China
Prior art keywords
vehicle
voltage
resistor
power supply
switch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202011477751.4A
Other languages
Chinese (zh)
Other versions
CN112590686A (en
Inventor
赵元国
范飞军
王军
刘满红
吕凯
胡芳芳
王士朋
余旭
赵飞
陈小磊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CETHIK Group Ltd
Original Assignee
CETHIK Group Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CETHIK Group Ltd filed Critical CETHIK Group Ltd
Priority to CN202011477751.4A priority Critical patent/CN112590686B/en
Publication of CN112590686A publication Critical patent/CN112590686A/en
Application granted granted Critical
Publication of CN112590686B publication Critical patent/CN112590686B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
    • B60R16/0231—Circuits relating to the driving or the functioning of the vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
    • B60R16/033—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for characterised by the use of electrical cells or batteries

Abstract

The invention discloses a switching management device and a switching management method of a vehicle-mounted power supply, wherein a power supply access is flexibly selected to be switched on or switched off according to needs, a vehicle original storage battery is charged preferentially when an engine of a vehicle is started, a special storage battery charging function is started only when the vehicle original storage battery is full of electric quantity, the charging electric quantity of the vehicle original storage battery is preferentially ensured, and meanwhile, a generator is prevented from charging two storage batteries with large current simultaneously, and the load of the generator is increased. After the engine of the vehicle is flamed out, the power supply of the equipment is automatically switched to the special storage battery, and the power input path of the charging circuit and the power supply path of the generator serving as the equipment are disconnected, so that the electric quantity of the original storage battery of the vehicle is prevented from being consumed by the equipment, the original storage battery of the vehicle and the special storage battery are prevented from being charged and discharged mutually, and the function of protecting the battery is achieved. After the vehicle is flamed out, the power supply of the special battery is turned off in a delayed mode, the situation that the normal use of a user is influenced by suddenly turning off the equipment under the condition that the user does not prepare is avoided, and therefore the adverse effect on the driving safety is avoided.

Description

Switching management device and switching management method for vehicle-mounted power supply
Technical Field
The application belongs to the technical field of vehicle-mounted power supply management, and particularly relates to a switching management device and a switching management method for a vehicle-mounted power supply.
Background
Intelligent driving training based on modern advanced technology is gradually rising, and then the requirement for the after-loading modification and upgrading of electronic equipment of a vehicle required for teaching is increasingly urgent, in order to realize intelligent teaching and teaching safety guarantee, a series of electronic and electrical equipment such as a vehicle-mounted computer, GPS positioning, mobile communication, video monitoring, voice communication, a vehicle-mounted radar, auxiliary braking and the like are additionally installed and integrated in the vehicle, and the whole control system is more complicated due to the upgrading and upgrading of the equipment, so that new requirements are provided for power supply systematization management, the power supply requirement of the after-loading equipment is guaranteed to be met, and the influence on the original power supply system of the vehicle is also guaranteed not to be influenced or reduced as much as possible, for example, the vehicle cannot be normally started due to the fact that the after-loading equipment consumes the electric quantity of a vehicle-mounted storage battery; if the special storage battery is added, the influence of the storage battery on the power supply system of the original vehicle is avoided; for example, how to ensure that the electronic equipment continuously and normally works when the vehicle is accidentally flamed out.
At present, the following defects exist in the systematic management of the vehicle-mounted power supply:
1) the prior art allows the after-loading equipment to continue to use the vehicle-mounted storage battery for supplying power after the vehicle is flameout, and even if the equipment is provided with the electric quantity detection function of the vehicle-mounted storage battery, the problems of service life shortening of the storage battery and the like caused by increasing the load of the vehicle-mounted storage battery and overusing the original storage battery of the vehicle can be solved.
2) In the prior art, the storage battery is not selected with priority in charging, power can be supplied to various electronic and electrical equipment after a vehicle is started, and meanwhile, the vehicle-mounted storage battery and the special storage battery are charged simultaneously, so that loads of a vehicle generator and a vehicle power supply path are undoubtedly increased.
3) The downstream power supply interface in the prior art is unique, the through-current capacity of a power transmission bus path is undoubtedly increased under the condition that high-power electrical equipment exists, a thick lead is further needed, the power transmission coupling path of the high-power equipment and small-power equipment is prolonged, and the power supply interference is reduced. Simultaneously, higher requirements on mechanical strength and fixed strength of the power management equipment interface are provided, and later-stage engineering implementation and installation are not facilitated.
Disclosure of Invention
The application aims to provide a switching management device and a switching management method of a vehicle-mounted power supply, which can automatically and reasonably switch a power supply of load equipment and ensure that a primary battery of an automobile has the highest charging priority.
In order to achieve the purpose, the technical scheme adopted by the application is as follows:
the utility model provides a switching management device of vehicle mounted power supply, vehicle mounted power supply includes car former storage battery and special battery, car former storage battery and special battery charge based on the generator power supply of vehicle, vehicle mounted power supply's switching management device includes: the system comprises a central control unit, a generator start-stop detection unit, a battery switching control unit and a battery charging management unit;
the generator starting and stopping detection unit is connected with the generator power supply and generates an interrupt signal according to the voltage of the output end of the generator power supply and feeds the interrupt signal back to the central control unit;
the battery switching control unit comprises a first switch, a second switch and a third switch, the automobile primary battery is connected with a power receiving load through the first switch for power supply, the special storage battery is connected with the power receiving load through the second switch for power supply, the control ends of the first switch and the second switch are connected to the central control unit, and the output end of the generator power supply is connected with the automobile primary battery;
the output end of the battery charging management unit is connected with a special storage battery, the input end of the battery charging management unit is connected with the output end of the power supply of the generator through a third switch, and the control end of the third switch is connected to the central control unit;
the central control unit judges the starting and stopping states of the vehicle according to the interrupt signals fed back by the generator starting and stopping detection unit, and controls the opening and closing states of the first switch, the second switch and the third switch respectively based on the starting and stopping states to realize switching management of the vehicle-mounted power supply.
Several alternatives are provided below, but not as an additional limitation to the above general solution, but merely as a further addition or preference, each alternative being combinable individually for the above general solution or among several alternatives without technical or logical contradictions.
Preferably, the generator start-stop detection unit comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, an optocoupler OC1, an NPN triode Q1, a PNP triode Q2 and a comparator U1;
the positive electrode of a light emitting diode ON the primary side of the optical coupler OC1 is connected with one end of a resistor R1, the other end of the resistor R1 is connected with a special storage battery as a VCC _ BAT end, the negative electrode of the light emitting diode ON the primary side of the optical coupler OC1 is connected with the output end of a power supply of a generator as a VCC _ M end, the collector ON the secondary side of the optical coupler OC1 is connected with one end of a resistor R2, the other end of the resistor R2 is connected with 3.3V, the emitter ON the secondary side of the optical coupler OC1 is grounded, and the collector ON the secondary side of the optical coupler OC1 leads out an INT _ ON end to be connected with a central control unit;
an emitting electrode of the NPN triode Q1 is grounded, a base electrode of the NPN triode Q1 is connected with one end of a resistor R7, the other end of the resistor R7 is connected with the central control unit as a SW end, a collector electrode of the NPN triode Q1 is connected with a base electrode of a PNP triode Q2 through a resistor R4, an emitting electrode of the PNP triode Q2 is connected with a negative electrode of a light emitting diode on the primary side of an optocoupler OC1, one end of the resistor R3 is connected with a base electrode of the PNP triode Q2, and the other end of the resistor R3 is connected with an emitting electrode of a PNP triode Q2;
the collecting electrode of PNP triode Q2 passes through resistance R5 and is connected with comparator U1's negative input end, resistance R6 one end ground connection, the other end are connected with comparator U1's negative input end, comparator U1's negative input end is drawn forth ADC _ IN end and is connected with central control unit, comparator U1's positive input end connects 3.3V through resistance R8, comparator U1's positive input end passes through resistance R9 ground connection, comparator U1's output is connected with central control unit as INT _ OFF end.
Preferably, the battery charging management unit comprises a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a diode D1, a diode D2, an inductor L1, a light-emitting diode LED1, a light-emitting diode LED2, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a resistor R16, a power supply chip U1 and a field effect transistor U2;
a 3 rd pin of the field-effect tube U2 is connected with an output end of a power supply of the generator through a third switch, 1 st and 2 nd pins of the field-effect tube U2 are connected with a 3 rd pin of the field-effect tube U2, a 3 rd pin of the field-effect tube U2 is grounded through a capacitor C1, a 3 rd pin of the field-effect tube U2 is connected with a 1 st pin of a power supply chip U1 through a capacitor C2, a 4 th pin of the field-effect tube U2 is connected with a 10 th pin of the power supply chip U1, a 5 th pin of the field-effect tube U2 is connected with an anode of a diode D1, and 6 th, 7 th and 8 th pins of the field-effect tube U2 are connected with a 5 th pin of the field-effect tube U2;
the negative electrode of the diode D1 is connected with one end of an inductor L1, the other end of the inductor L1 is connected with a special storage battery through a resistor R10, a resistor R11 is connected in parallel with two ends of a resistor R10, one end of the resistor R10, which is connected with the special storage battery, is grounded through a capacitor C3, the negative electrode of the diode D1 is connected with the negative electrode of a diode D2, and the positive electrode of the diode D2 is grounded;
the 2 nd pin of the power chip U1 is grounded, the 3 rd pin of the power chip U1 is connected with the cathode of the light emitting diode LED1, the anode of the light emitting diode LED1 is connected with one end of the third switch far away from the power supply of the generator through a resistor R12, the 4 th pin of the power chip U1 is connected with the cathode of the light emitting diode LED2, the anode of the light emitting diode LED2 is connected with one end of the third switch far away from the power supply of the generator through a resistor R13, the 5 th pin of the power chip U1 is grounded through a resistor R14 and a capacitor C4, the 6 th pin of the power chip U1 is grounded through a resistor R15, the 6 th pin of the power chip U1 is connected with one end of the third switch far away from the power supply of the generator through a resistor R16, the 7 th pin of the power chip U1 is connected with one end of a special storage battery connected with the resistor R10, the 8 th pin of the power chip U1 is connected with one end of an inductor L1 connected with the resistor R10, the 9 th lead of the power chip U1 is connected with one end of the third switch far away from the power supply of the generator.
The application also provides a switching management method of the vehicle-mounted power supply, which comprises the following steps:
the generator start-stop detection unit generates an interrupt signal according to the voltage of the output end of the generator power supply and feeds the interrupt signal back to the central control unit;
the central control unit judges the starting and stopping states of the vehicle according to an interruption signal fed back by the generator starting and stopping detection unit, wherein the starting and stopping states comprise a starting state and a flameout state, and the switching states of the first switch, the second switch and the third switch are respectively controlled based on the starting and stopping states to realize switching management of the vehicle-mounted power supply, and comprise a disconnection state and a connection state;
the central control unit respectively controls the opening and closing states of the first switch, the second switch and the third switch based on the starting and stopping states to realize switching management of the vehicle-mounted power supply, and the switching management comprises the following specific steps:
when the vehicle is judged to be changed from the starting state to the flameout state, the second switch is controlled to be closed, the first switch and the third switch are controlled to be opened, and the second switch is controlled to be opened after a preset time length;
when the vehicle is judged to be changed from a flameout state to a starting state, if the second switch is in a closed state at present, the first switch and the third switch are controlled to be closed, and the second switch is controlled to be disconnected; if the second switch is in the off state, the central control unit controls the first switch and the third switch to be closed and the second switch to be kept off.
Preferably, the switching management method of the vehicle-mounted power supply further comprises the steps that when the third switch is in a closed state, the charging management unit continuously monitors the voltage of the automobile primary battery, and if the voltage of the automobile primary battery reaches a preset voltage, the special storage battery is charged; otherwise, the special storage battery is not charged.
Preferably, the generator start-stop detection unit generates an interrupt signal according to the voltage of the output end of the generator power supply and feeds the interrupt signal back to the central control unit; the central control unit judges the starting and stopping state of the vehicle according to the interrupt signal fed back by the generator starting and stopping detection unit, and comprises:
when the vehicle is in a flameout state, the VCC _ M end is an original storage battery power supply of the vehicle, the typical voltage value is 12V, the VCC _ BAT end is connected with the special storage battery, the typical voltage value is 12V, the voltage of the VCC _ M end is more than or equal to the voltage of the VCC _ BAT end, the optocoupler OC1 is in a cut-off state, and the INT _ ON end is in a high level state; the central control unit keeps the SW end at a low level, the NPN triode Q1 and the PNP triode Q2 are IN a cut-OFF state, the voltage collected by the VCC _ M end is not fed back to the comparator U1, the ADC _ IN end is at a low level and is lower than the reference voltage of the positive input end of the comparator, and the INT _ OFF end output by the comparator U1 is at a high level state;
when a vehicle is IN a starting state, a VCC _ M end takes a power supply of an automobile generator, the voltage value is 14.5V, the voltage of the VCC _ M end is higher than that of a VCC _ BAT end, an optocoupler OC1 is IN a cut-OFF state, an INT _ ON end is IN a high level state, a central control unit keeps the SW end IN a high level state, an NPN triode Q1 and a PNP triode Q2 are IN a conducting state, the voltage collected by the VCC _ M end is fed back to a comparator U1, the voltage of an ADC _ IN end takes a divided voltage value of the voltage of the VCC _ M end after passing through a resistor R5 and a resistor R6, the reference voltage of a forward input end of the comparator U1 is lower than the divided voltage value, and the INT _ OFF end output by the comparator U1 is IN a low level state;
1) vehicle start detection:
a. at the moment of vehicle ignition, a VCC _ M terminal voltage falls from 12V to 9V, a forward voltage difference is generated at two ends of the primary side of the optocoupler OC1 to enable the optocoupler OC1 to be conducted, and an INT _ ON terminal is converted from a high level to a low level to generate an interrupt signal; if the vehicle is successfully started, the voltage VCC _ M is recovered to the output voltage of the power supply of the generator, if the vehicle is not successfully started, the voltage VCC _ M is recovered to the voltage of the original battery of the vehicle, the voltage at the two ends of the primary side of the optocoupler OC1 is reversely cut off, and the INT _ ON end is changed into a high level state;
b. after the central control unit detects an interrupt signal of the INT _ ON end, the output enables the SW end to become high level, the NPN triode Q1 and the PNP triode Q2 are IN a conducting state, the voltage collected by the VCC _ M end is fed back to the comparator U1, and the voltage of the ADC _ IN end is a voltage division value of the voltage of the VCC _ M end after passing through the resistor R5 and the resistor R6;
c. if the vehicle is successfully started, the voltage of the negative input end of the comparator U1 is higher than the reference voltage of the positive input end of the comparator U1, the comparator U1 outputs an interrupt signal when the INT _ OFF end is inverted from a high level to a low level, otherwise, the INT _ OFF end keeps the high level without the interrupt signal, namely, the vehicle is still in a flameout state;
d. after the central control unit detects the interruption of the INT _ OFF end, starting the voltage of the AD sampling ADC _ IN end, comparing the voltage with a preset reference level, and if the voltage is continuously higher than the preset level, judging that the vehicle is started successfully; otherwise, the vehicle fails to start, namely the vehicle is still in a flameout state;
2) vehicle flameout detection:
a. after the vehicle is flamed out, the voltage of a VCC _ M end is reduced to 12V of the voltage of an original battery jar of the vehicle, the voltage of two ends of the primary side of the optocoupler OC1 is cut off in a reverse direction, and an INT _ ON end still keeps a high level state; the voltage of the ADC _ IN end is reduced to be lower than the reference voltage of the positive input end of the comparator U1, and the INT _ OFF end output by the comparator U1 is inverted from low level to high level to generate an interrupt signal;
b. after the central control unit detects an interrupt signal of an INT _ OFF end, the INT _ ON end is monitored to be high level and no falling edge interrupt signal is generated, voltage sampling of an ADC _ IN end is collected and compared with a preset voltage value, and if the voltage sampling is continuously lower than the preset voltage value, the vehicle is judged to be flameout;
c. after the central control unit judges that the vehicle is flamed out, the output enables the SW end to become low level, the NPN triode Q1 and the PNP triode Q2 become cut-off states, and the voltage collected by the VCC _ M end is not fed back to the comparator U1.
The application provides a switching management device and switching management method of vehicle power supply, as required nimble selection switch-on or switch-off power supply route, under vehicle engine starting condition, the alternative is prior to charging for the former storage battery of vehicle, just can open special storage battery charging function when treating that the former storage battery electric quantity of vehicle is abundant, the former storage battery electric quantity of charging of priority guarantee vehicle avoids the generator to charge for two blocks of storage battery heavy currents simultaneously, increases the generator load. After the engine of the vehicle is flamed out, the power supply of the equipment is automatically switched to the special storage battery, and meanwhile, the power supply input path of the charging circuit and the power supply path of the generator serving as the equipment are disconnected, so that the equipment is prevented from consuming the electric quantity of the primary storage battery of the vehicle, the primary storage battery of the vehicle and the special storage battery are prevented from being charged and discharged mutually, and the battery is protected. After the vehicle is flamed out, the power supply of the special battery is turned off in a delayed mode, the situation that the normal use of a user is influenced by suddenly turning off the equipment under the condition that the user does not prepare is avoided, and therefore the adverse effect on the driving safety is avoided.
Drawings
Fig. 1 is a schematic structural diagram of a switching management device of a vehicle-mounted power supply according to the present application;
FIG. 2 is a schematic structural diagram of a generator start-stop detection unit according to the present application;
FIG. 3 is a schematic diagram of a dedicated battery charging management unit;
fig. 4 is a flowchart of a handover management method according to the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
In one embodiment, the switching management device for the vehicle-mounted power supply is provided, so that charging and discharging between a primary storage battery and a special storage battery of an automobile are effectively managed, the service life and the continuous service time of the vehicle-mounted power supply are prolonged, and the switching management device has a better application value on various vehicles.
As shown in fig. 1, the vehicle-mounted power supply of the present embodiment includes a vehicle primary battery and a dedicated battery, which are charged based on a generator power supply of the vehicle, and therefore the switching management device of the vehicle-mounted power supply of the present embodiment includes: the system comprises a central control unit, a generator start-stop detection unit, a battery switching control unit and a battery charging management unit.
The generator starting and stopping detection unit is connected with the generator power supply and generates an interrupt signal according to the voltage of the output end of the generator power supply and feeds the interrupt signal back to the central control unit;
the battery switching control unit comprises a first switch, a second switch and a third switch, the automobile primary battery is connected with a power receiving load through the first switch for power supply, the output end of the special storage battery is connected with the power receiving load through the second switch for power supply, the control ends of the first switch and the second switch are connected to the central control unit, and the output end of the generator power supply is connected with the automobile primary battery;
the output end of the battery charging management unit is connected with a special storage battery, the input end of the battery charging management unit is connected with the output end of the power supply of the generator through a third switch, and the control end of the third switch is connected to the central control unit;
the central control unit judges the starting and stopping states of the vehicle according to the interrupt signals fed back by the generator starting and stopping detection unit, and controls the opening and closing states of the first switch, the second switch and the third switch respectively based on the starting and stopping states to realize switching management of the vehicle-mounted power supply.
Generally, the generator power supply does not have voltage output when the vehicle is flamed out, the voltage value when the vehicle is started can reach 14.5V, the typical voltage value of the automobile primary battery is 12V when the vehicle is flamed out or started, and the starting and stopping state of the vehicle is judged by the central control unit based on the output end of the generator power supply (namely the terminal of the automobile primary battery) based on the embodiment. The judging mode can judge the starting and stopping states of the vehicle intuitively and accurately, and the judging speed is high because the judging path is direct.
Further, the switching control of the vehicle-mounted power supply can be realized only by controlling the opening and closing states of the 3 switches, the structure of excessive elements is not needed, the energy consumption of the whole judgment control is reduced, the size of the switching management device of the embodiment is effectively reduced, and the switching management device is beneficial to being integrated and used on large, medium and small vehicles.
In order to ensure the normal use of the central control unit, the power supply module is further provided, the input end of the power supply module is respectively connected with the special storage battery and the power supply of the generator through the diode, and the output end of the power supply module is connected with the central control unit. The power module is a conventional circuit in the chip control design, and is not described herein again.
As shown in fig. 2, the generator start-stop detection unit provided by this embodiment includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, an optocoupler OC1, an NPN triode Q1, a PNP triode Q2, and a comparator U1.
The anodal one end with resistance R1 of emitting diode of the former avris of opto-coupler OC1 is connected, and resistance R1's the other end is connected with special battery as VCC _ BAT end, the emitting diode's of the former avris of opto-coupler OC1 negative pole is connected with the output of generator power as VCC _ M end, the vice limit of opto-coupler OC1 side collecting electrode is connected with resistance R2's one end, and another termination 3.3V of resistance R2, the vice limit of opto-coupler OC1 side emitter ground connection, the vice limit of opto-coupler OC1 side collecting electrode is drawn forth INT _ ON end and is connected with central control unit.
The emitter of the NPN triode Q1 is grounded, the base of the NPN triode Q1 is connected with one end of a resistor R7, the other end of the resistor R7 is connected with the central control unit as a SW end, the collector of the NPN triode Q1 is connected with the base of a PNP triode Q2 through a resistor R4, the emitter of the PNP triode Q2 is connected with the negative electrode of a light emitting diode on the primary side of an optocoupler OC1, one end of the resistor R3 is connected with the base of the PNP triode Q2, and the other end of the resistor R3 is connected with the emitter of a PNP triode Q2.
The collecting electrode of PNP triode Q2 passes through resistance R5 and is connected with comparator U1's negative input end, resistance R6 one end ground connection, the other end is connected with comparator U1's negative input end, comparator U1's negative input end is drawn forth ADC _ IN end and is connected with central control unit, comparator U1's positive input end connects 3.3V through resistance R8, comparator U1's positive input end passes through resistance R9 ground connection, comparator U1's output is connected with central control unit as INT _ OFF end.
The generator start-stop detection unit IN the embodiment triggers the central control unit to start corresponding vehicle start or flameout detection by utilizing interrupt signals of the INT _ OFF end and the INT _ ON end, determines the start-stop state of the vehicle by matching with the voltage of the ADC _ IN end, avoids the situation that false detection is easy to occur when detection is performed according to a single signal, and avoids false detection caused by voltage drift or instability ON the basis of voltage detection of the ADC _ IN end for a certain time.
It should be noted that, the above-mentioned optimal circuit structure of the generator start-stop detection unit provided in this embodiment is still within the protection scope of the present application, and the generator start-stop detection unit is obtained by simple modification based on the above-mentioned circuit structure. Wherein a central control unit has a larger number of controller models available, such as the STM32F1X family. The general IO port of connecting pin is connected to the IO port that has interrupt function can, no special requirement and restriction, ADC _ IN end is connected to AD passageway pin can, therefore this application does not carry out specific restriction to central control unit's model.
As shown in fig. 3, in order to avoid affecting the charging efficiency of the primary battery of the automobile, the present embodiment provides a battery charging management unit, which includes a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a diode D1, a diode D2, an inductor L1, a light emitting diode LED1, a light emitting diode LED2, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a resistor R16, a power chip U1, and a field effect transistor U2.
A 3 rd pin of the field-effect tube U2 is connected with an output end of a power supply of the generator through a third switch, 1 st and 2 nd pins of the field-effect tube U2 are connected with a 3 rd pin of the field-effect tube U2, a 3 rd pin of the field-effect tube U2 is grounded through a capacitor C1, a 3 rd pin of the field-effect tube U2 is connected with a 1 st pin of a power supply chip U1 through a capacitor C2, a 4 th pin of the field-effect tube U2 is connected with a 10 th pin of a power supply chip U1, a 5 th pin of the field-effect tube U2 is connected with an anode of a diode D1, and 6 th, 7 th and 8 th pins of the field-effect tube U2 are connected with a 5 th pin of the field-effect tube U2.
The negative electrode of the diode D1 is connected with one end of an inductor L1, the other end of the inductor L1 is connected with the special storage battery through a resistor R10, a resistor R11 is connected in parallel with two ends of a resistor R10, one end of the resistor R10, which is connected with the special storage battery, is grounded through a capacitor C3, the negative electrode of the diode D1 is connected with the negative electrode of the diode D2, and the positive electrode of the diode D2 is grounded.
The 2 nd pin of the power chip U1 is grounded, the 3 rd pin of the power chip U1 is connected with the cathode of the light emitting diode LED1, the anode of the light emitting diode LED1 is connected with one end of the third switch far away from the power supply of the generator through a resistor R12, the 4 th pin of the power chip U1 is connected with the cathode of the light emitting diode LED2, the anode of the light emitting diode LED2 is connected with one end of the third switch far away from the power supply of the generator through a resistor R13, the 5 th pin of the power chip U1 is grounded through a resistor R14 and a capacitor C4, the 6 th pin of the power chip U1 is grounded through a resistor R15, the 6 th pin of the power chip U1 is connected with one end of the third switch far away from the power supply of the generator through a resistor R16, the 7 th pin of the power chip U1 is connected with one end of a special storage battery connected with the resistor R10, the 8 th pin of the power chip U1 is connected with one end of an inductor L1 connected with the resistor R10, the 9 th lead of the power chip U1 is connected with one end of the third switch far away from the power supply of the generator.
The power chip U1 can be CN3767 chip, and the field effect transistor U2 can be packaged by SOP-8.
Based on the CN3767 chip, the working flow of the battery charging management unit in this embodiment is as follows:
the resistor R10 and the resistor R11 adjust charging current, and the diode D1 prevents the special storage battery from being charged for a long time, limits charging voltage and prevents the current between the special storage battery and the original storage battery of the automobile from flowing backwards.
After the vehicle is successfully started, the second switch is turned off, the first switch and the third switch are turned on, one end, namely a Vcrg end, far away from a power supply of the generator is divided by resistors R15 and R16 and then input to an MPPT pin (pin 6), if the divided voltage value is higher than the internal reference Vref of a chip, the special storage battery is started for charging, otherwise, the charging function of the special storage battery is not started, when the charging is carried out until the forward voltage difference between two ends of a diode D1 is lower than the D1 conduction voltage, the special storage battery is considered to be fully charged, the storage battery is not continuously charged, and the charging is turned off.
When judging whether to start charging or not according to the MPPT pin voltage of the CN3767 chip, the starting charging voltage threshold is set through the voltage division of the resistors R15 and R16. If the vehicle is shut down, the voltage of the original battery of the automobile is about 12V, and the voltage input to the MPPT pin through the resistors R15 and R16 is lower than the internal reference voltage Vref of the chip, the charging is closed. If the vehicle is started, the generator power supply outputs voltage, the generator power supply charges the original storage battery of the vehicle after the vehicle is started, the output voltage of the generator power supply is temporarily lower than 14.5V, the battery charging management unit detects that the external voltage is still lower than the internal reference voltage, the special storage battery is not started to be charged, and when the original storage battery of the vehicle is charged for a period of time, the voltage at the output end of the generator charges to raise the voltage of the original storage battery of the vehicle back to be higher than a threshold, the special storage battery is started to be charged.
The charging management module preferentially ensures that the original storage battery of the automobile is charged to the condition that the electric quantity is sufficient and then automatically starts to charge the special storage battery under the starting state of the automobile, thereby not influencing the charging efficiency of the original storage battery of the automobile, avoiding overlarge power load pressure of the generator and ensuring that the special storage battery can be automatically charged.
The power supply of the power generator is preferentially used for supplying power to the equipment when the vehicle is started, the original vehicle-mounted storage battery is prevented from supplying power to the additional equipment and feeding power after flameout, meanwhile, automatic switching to the special storage battery is achieved, the equipment continues to work within the specified time without power failure, the power supply of the power generator is switched again after the vehicle is restarted, and the accessory equipment cannot be restarted due to power failure in the whole switching process.
In another embodiment, a switching management method for a vehicle-mounted power supply is provided, where the method is implemented based on the switching management device for the vehicle-mounted power supply, and a specific switching management method of this embodiment includes the following steps:
the generator start-stop detection unit generates an interrupt signal according to the voltage of the output end of the generator power supply and feeds the interrupt signal back to the central control unit.
The central control unit judges the starting and stopping states of the vehicle according to an interruption signal fed back by the generator starting and stopping detection unit, the starting and stopping states comprise a starting state and a flameout state, the opening and closing states of the first switch, the second switch and the third switch are respectively controlled based on the starting and stopping states to achieve switching management of the vehicle-mounted power supply, and the opening and closing states comprise disconnection and connection.
As shown in fig. 4, the central control unit respectively controls the on-off states of the first switch, the second switch, and the third switch based on the start-stop state to implement switching management of the vehicle-mounted power supply, which is specifically as follows:
and when the vehicle is judged to be changed from the starting state to the flameout state, the second switch is controlled to be closed, the first switch and the third switch are controlled to be opened, and the second switch is controlled to be opened after a preset time length.
When the vehicle is judged to be changed from a flameout state to a starting state, if the second switch is in a closed state at present, the first switch and the third switch are controlled to be closed, and the second switch is controlled to be disconnected; if the second switch is in an off state, the central control unit controls the first switch and the third switch to be closed and the second switch to be kept off.
In order to ensure that the original storage battery of the automobile has the highest charging priority, the switching management method of the vehicle-mounted power supply further comprises the steps that when the third switch is in a closed state, the charging management unit continuously monitors the voltage of the original storage battery of the automobile, and if the voltage of the original storage battery of the automobile reaches a preset voltage, the special storage battery is charged; otherwise, the special storage battery is not charged.
In the embodiment, the generator start-stop detection unit generates an interrupt signal according to the voltage of the output end of the generator power supply and feeds the interrupt signal back to the central control unit; the central control unit judges the start-stop state of the vehicle according to the interrupt signal fed back by the generator start-stop detection unit, and comprises:
when the vehicle is in a flameout state, the VCC _ M end is an original storage battery power supply of the vehicle, the typical voltage value is 12V, the VCC _ BAT end is connected with the special storage battery, the typical voltage value is 12V, the voltage of the VCC _ M end is more than or equal to the voltage of the VCC _ BAT end, the optocoupler OC1 is in a cut-off state, and the INT _ ON end is in a high level state; the central control unit keeps the SW end at a low level, the NPN triode Q1 and the PNP triode Q2 are IN a cut-OFF state, the voltage collected by the VCC _ M end is not fed back to the comparator U1, the ADC _ IN end is at a low level and is lower than the reference voltage of the positive input end of the comparator, and the INT _ OFF end output by the comparator U1 is at a high level state.
When a vehicle is IN a starting state, a VCC _ M end obtains a power supply of an automobile generator, the voltage value is 14.5V, the voltage of the VCC _ M end is higher than that of a VCC _ BAT end, an optocoupler OC1 is IN a cut-OFF state, an INT _ ON end is IN a high level state, a central control unit keeps the SW end IN a high level state, an NPN triode Q1 and a PNP triode Q2 are IN a conducting state, the voltage collected by the VCC _ M end is fed back to a comparator U1, the voltage of an ADC _ IN end obtains a divided voltage value of the voltage of the VCC _ M end after passing through a resistor R5 and a resistor R6, the reference voltage of a forward input end of the comparator U1 is lower than the divided voltage value, and the INT _ OFF end is IN a low level state output by the comparator U1;
1) vehicle start detection:
a. at the moment of vehicle ignition, the voltage of VCC _ M drops from 12V to 9V, the two ends of the primary side of the optocoupler OC1 generate a forward voltage difference to enable the optocoupler OC1 to be switched ON, and the INT _ ON end is switched from a high level to a low level to generate an interrupt signal; if the vehicle is successfully started, the voltage VCC _ M is recovered to the output voltage of the generator, if the vehicle is not successfully started, the voltage VCC _ M is recovered to the original battery voltage of the vehicle, the voltage at the two ends of the primary side of the optocoupler OC1 is reversely cut off, and the INT _ ON end is changed into a high level state.
b. After the central control unit detects an interrupt signal of the INT _ ON end, the output enables the SW end to become high level, the NPN triode Q1 and the PNP triode Q2 are IN a conducting state, the voltage collected by the VCC _ M end is fed back to the comparator U1, and the voltage of the ADC _ IN end is a voltage division value of the voltage of the VCC _ M end after passing through the resistor R5 and the resistor R6.
c. If the vehicle is successfully started, the voltage at the negative input end of the comparator U1 is higher than the reference voltage at the positive input end of the comparator U1, the comparator U1 outputs an interrupt signal when the INT _ OFF end is inverted from high level to low level, otherwise, the INT _ OFF end keeps high level and has no interrupt signal, namely, the vehicle is still in a flameout state.
d. After the central control unit detects the interruption of the INT _ OFF end, starting the voltage of the AD sampling ADC _ IN end, comparing the voltage with a preset reference level, and if the voltage is continuously higher than the preset level, judging that the vehicle is started successfully; otherwise, the vehicle fails to start, namely the vehicle is still in a flameout state.
2) Vehicle flameout detection:
a. after the vehicle is flamed out, the voltage of a VCC _ M end is reduced to 12V of the voltage of an original battery jar of the vehicle, the voltage of two ends of the primary side of the optocoupler OC1 is cut off in a reverse direction, and an INT _ ON end still keeps a high level state; the voltage at the ADC _ IN terminal is reduced to be lower than the reference voltage at the positive input end of the comparator U1, and the INT _ OFF terminal output by the comparator U1 is inverted from low level to high level to generate an interrupt signal.
b. After the central control unit detects the interrupt signal of the INT _ OFF end, the INT _ ON end is monitored to be at a high level and no falling edge interrupt signal is generated, the voltage sampling of the ADC _ IN end is collected and compared with a preset voltage value, and if the voltage sampling is continuously lower than the preset voltage value, the vehicle is judged to be flameout.
c. After the central control unit judges that the vehicle is flamed out, the output enables the SW end to become low level, the NPN triode Q1 and the PNP triode Q2 become cut-off states, and the voltage collected by the VCC _ M end is not fed back to the comparator U1.
The switching management device of the vehicle-mounted power supply, which runs the switching management method of the application, can realize seamless switching no matter from the high level of the generator to the low level of the special storage battery or from the storage battery to the high level of the generator, and the power failure restart of the power receiving equipment cannot be caused in the switching process. When the engine is flamed out, the power supply path of the generator can be cut off, the special storage battery supplies power, and the power is cut off and shut down after the delay is set to be 5 minutes; when the engine is started, the power supply path of the special storage battery can be cut off, and the generator supplies power. The special battery charging function normally starts the special storage battery charging when the voltage of the power supply path of the generator exceeds the set 13.5V.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, and these are all within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (5)

1. The utility model provides a switching management device of vehicle mounted power supply, its characterized in that, vehicle mounted power supply includes former storage battery of car and special battery, former storage battery of car and special battery charge based on the generator power supply of vehicle, vehicle mounted power supply's switching management device includes: the system comprises a central control unit, a generator start-stop detection unit, a battery switching control unit and a battery charging management unit;
the generator starting and stopping detection unit is connected with the generator power supply and generates an interrupt signal according to the voltage of the output end of the generator power supply and feeds the interrupt signal back to the central control unit;
the battery switching control unit comprises a first switch, a second switch and a third switch, the automobile primary battery is connected with a power receiving load through the first switch for power supply, the special storage battery is connected with the power receiving load through the second switch for power supply, the control ends of the first switch and the second switch are connected to the central control unit, and the output end of the generator power supply is connected with the automobile primary battery;
the output end of the battery charging management unit is connected with a special storage battery, the input end of the battery charging management unit is connected with the output end of the power supply of the generator through a third switch, and the control end of the third switch is connected to the central control unit;
the central control unit judges the starting and stopping states of the vehicle according to the interrupt signals fed back by the generator starting and stopping detection unit, and controls the opening and closing states of the first switch, the second switch and the third switch respectively to realize switching management of the vehicle-mounted power supply based on the starting and stopping states;
the generator start-stop detection unit comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, an optocoupler OC1, an NPN triode Q1, a PNP triode Q2 and a comparator U1;
the positive electrode of a light emitting diode ON the primary side of the optical coupler OC1 is connected with one end of a resistor R1, the other end of the resistor R1 is connected with a special storage battery as a VCC _ BAT end, the negative electrode of the light emitting diode ON the primary side of the optical coupler OC1 is connected with the output end of a power supply of a generator as a VCC _ M end, the collector ON the secondary side of the optical coupler OC1 is connected with one end of a resistor R2, the other end of the resistor R2 is connected with 3.3V, the emitter ON the secondary side of the optical coupler OC1 is grounded, and the collector ON the secondary side of the optical coupler OC1 leads out an INT _ ON end to be connected with a central control unit;
an emitting electrode of the NPN triode Q1 is grounded, a base electrode of the NPN triode Q1 is connected with one end of a resistor R7, the other end of the resistor R7 is connected with the central control unit as a SW end, a collector electrode of the NPN triode Q1 is connected with a base electrode of a PNP triode Q2 through a resistor R4, an emitting electrode of the PNP triode Q2 is connected with a negative electrode of a light emitting diode on the primary side of an optocoupler OC1, one end of the resistor R3 is connected with a base electrode of the PNP triode Q2, and the other end of the resistor R3 is connected with an emitting electrode of a PNP triode Q2;
the collecting electrode of PNP triode Q2 passes through resistance R5 and is connected with comparator U1's negative input end, resistance R6 one end ground connection, the other end is connected with comparator U1's negative input end, comparator U1's negative input end is drawn forth ADC _ IN end and is connected with central control unit, comparator U1's positive input end connects 3.3V through resistance R8, comparator U1's positive input end passes through resistance R9 ground connection, comparator U1's output is connected with central control unit as INT _ OFF end.
2. The switching management device for the vehicle-mounted power supply according to claim 1, wherein the battery charging management unit includes a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a diode D1, a diode D2, an inductor L1, a light emitting diode LED1, a light emitting diode LED2, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a resistor R16, a power chip U1, a field effect transistor U2;
a 3 rd pin of the field-effect tube U2 is connected with an output end of a power supply of the generator through a third switch, 1 st and 2 nd pins of the field-effect tube U2 are connected with a 3 rd pin of the field-effect tube U2, a 3 rd pin of the field-effect tube U2 is grounded through a capacitor C1, a 3 rd pin of the field-effect tube U2 is connected with a 1 st pin of a power supply chip U1 through a capacitor C2, a 4 th pin of the field-effect tube U2 is connected with a 10 th pin of the power supply chip U1, a 5 th pin of the field-effect tube U2 is connected with an anode of a diode D1, and 6 th, 7 th and 8 th pins of the field-effect tube U2 are connected with a 5 th pin of the field-effect tube U2;
the negative electrode of the diode D1 is connected with one end of an inductor L1, the other end of the inductor L1 is connected with a special storage battery through a resistor R10, a resistor R11 is connected in parallel with two ends of a resistor R10, one end of the resistor R10, which is connected with the special storage battery, is grounded through a capacitor C3, the negative electrode of the diode D1 is connected with the negative electrode of a diode D2, and the positive electrode of the diode D2 is grounded;
the 2 nd pin of the power chip U1 is grounded, the 3 rd pin of the power chip U1 is connected with the cathode of the light emitting diode LED1, the anode of the light emitting diode LED1 is connected with one end of the third switch far away from the power supply of the generator through a resistor R12, the 4 th pin of the power chip U1 is connected with the cathode of the light emitting diode LED2, the anode of the light emitting diode LED2 is connected with one end of the third switch far away from the power supply of the generator through a resistor R13, the 5 th pin of the power chip U1 is grounded through a resistor R14 and a capacitor C4, the 6 th pin of the power chip U1 is grounded through a resistor R15, the 6 th pin of the power chip U1 is connected with one end of the third switch far away from the power supply of the generator through a resistor R16, the 7 th pin of the power chip U1 is connected with one end of a special storage battery connected with the resistor R10, the 8 th pin of the power chip U1 is connected with one end of an inductor L1 connected with the resistor R10, the 9 th lead of the power chip U1 is connected with one end of the third switch far away from the power supply of the generator.
3. A switching management method of a vehicle-mounted power supply is realized based on the switching management device of the vehicle-mounted power supply of claim 1, and is characterized by comprising the following steps:
the generator start-stop detection unit generates an interrupt signal according to the voltage of the output end of the generator power supply and feeds the interrupt signal back to the central control unit;
the central control unit judges the starting and stopping states of the vehicle according to an interruption signal fed back by the generator starting and stopping detection unit, wherein the starting and stopping states comprise a starting state and a flameout state, and the switching states of the first switch, the second switch and the third switch are respectively controlled based on the starting and stopping states to realize switching management of the vehicle-mounted power supply, and comprise a disconnection state and a connection state;
the central control unit respectively controls the opening and closing states of the first switch, the second switch and the third switch based on the starting and stopping states to realize switching management of the vehicle-mounted power supply, and the switching management comprises the following specific steps:
when the vehicle is judged to be changed from the starting state to the flameout state, the second switch is controlled to be closed, the first switch and the third switch are controlled to be opened, and the second switch is controlled to be opened after a preset time length;
when the vehicle is judged to be changed from a flameout state to a starting state, if the second switch is in a closed state at present, the first switch and the third switch are controlled to be closed, and the second switch is controlled to be disconnected; if the second switch is in the off state, the central control unit controls the first switch and the third switch to be closed and the second switch to be kept off.
4. The switching management method of the vehicle-mounted power supply according to claim 3, further comprising the steps that when the third switch is in a closed state, the charging management unit continuously monitors the voltage of the automobile primary battery, and if the voltage of the automobile primary battery reaches a preset voltage, the special storage battery is charged; otherwise, the special storage battery is not charged.
5. The switching management method of the vehicle-mounted power supply according to claim 3, characterized in that the generator start-stop detection unit generates an interrupt signal according to the voltage of the output end of the generator power supply and feeds the interrupt signal back to the central control unit; the central control unit judges the start-stop state of the vehicle according to the interrupt signal fed back by the generator start-stop detection unit, and comprises:
when the vehicle is in a flameout state, the VCC _ M end is an original storage battery power supply of the vehicle, the typical voltage value is 12V, the VCC _ BAT end is connected with the special storage battery, the typical voltage value is 12V, the voltage of the VCC _ M end is more than or equal to the voltage of the VCC _ BAT end, the optocoupler OC1 is in a cut-off state, and the INT _ ON end is in a high level state; the central control unit keeps the SW end at a low level, the NPN triode Q1 and the PNP triode Q2 are IN a cut-OFF state, the voltage collected by the VCC _ M end is not fed back to the comparator U1, the ADC _ IN end is at a low level and is lower than the reference voltage of the positive input end of the comparator, and the INT _ OFF end output by the comparator U1 is at a high level state;
when a vehicle is IN a starting state, a VCC _ M end obtains a power supply of an automobile generator, the voltage value is 14.5V, the voltage of the VCC _ M end is higher than that of a VCC _ BAT end, an optocoupler OC1 is IN a cut-OFF state, an INT _ ON end is IN a high level state, a central control unit keeps the SW end IN a high level state, an NPN triode Q1 and a PNP triode Q2 are IN a conducting state, the voltage collected by the VCC _ M end is fed back to a comparator U1, the voltage of an ADC _ IN end obtains a divided voltage value of the voltage of the VCC _ M end after passing through a resistor R5 and a resistor R6, the reference voltage of a forward input end of the comparator U1 is lower than the divided voltage value, and the INT _ OFF end is IN a low level state output by the comparator U1;
1) vehicle start detection:
a. at the moment of vehicle ignition, the voltage of VCC _ M drops from 12V to 9V, the two ends of the primary side of the optocoupler OC1 generate a forward voltage difference to enable the optocoupler OC1 to be switched ON, and the INT _ ON end is switched from a high level to a low level to generate an interrupt signal; if the vehicle is successfully started, the voltage VCC _ M is recovered to the output voltage of the power supply of the generator, if the vehicle is not successfully started, the voltage VCC _ M is recovered to the voltage of the original battery of the vehicle, the voltage at the two ends of the primary side of the optocoupler OC1 is reversely cut off, and the INT _ ON end is changed into a high level state;
b. after the central control unit detects an interrupt signal of the INT _ ON end, the output enables the SW end to become high level, the NPN triode Q1 and the PNP triode Q2 are IN a conducting state, the voltage collected by the VCC _ M end is fed back to the comparator U1, and the voltage of the ADC _ IN end is a voltage division value of the voltage of the VCC _ M end after passing through the resistor R5 and the resistor R6;
c. if the vehicle is successfully started, the voltage of the negative input end of the comparator U1 is higher than the reference voltage of the positive input end of the comparator U1, the comparator U1 outputs an interrupt signal when the INT _ OFF end is inverted from a high level to a low level, otherwise, the INT _ OFF end keeps the high level without the interrupt signal, namely, the vehicle is still in a flameout state;
d. after the central control unit detects the interruption of the INT _ OFF end, starting the voltage of the AD sampling ADC _ IN end, comparing the voltage with a preset reference level, and if the voltage is continuously higher than the preset level, judging that the vehicle is started successfully; otherwise, the vehicle fails to start, namely the vehicle is still in a flameout state;
2) vehicle flameout detection:
a. after the vehicle is flamed out, the voltage of a VCC _ M end is reduced to 12V of the voltage of an original battery jar of the vehicle, the voltage of two ends of the primary side of the optocoupler OC1 is cut off in a reverse direction, and an INT _ ON end still keeps a high level state; the voltage of the ADC _ IN end is reduced to be lower than the reference voltage of the positive input end of the comparator U1, and the INT _ OFF end output by the comparator U1 is inverted from low level to high level to generate an interrupt signal;
b. after the central control unit detects an interrupt signal of an INT _ OFF end, the INT _ ON end is monitored to be high level and no falling edge interrupt signal is generated, voltage sampling of an ADC _ IN end is collected and compared with a preset voltage value, and if the voltage sampling is continuously lower than the preset voltage value, the vehicle is judged to be flameout;
c. after the central control unit judges that the vehicle is flamed out, the output enables the SW end to become low level, the NPN triode Q1 and the PNP triode Q2 become cut-off states, and the voltage collected by the VCC _ M end is not fed back to the comparator U1.
CN202011477751.4A 2020-12-15 2020-12-15 Switching management device and switching management method for vehicle-mounted power supply Active CN112590686B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011477751.4A CN112590686B (en) 2020-12-15 2020-12-15 Switching management device and switching management method for vehicle-mounted power supply

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011477751.4A CN112590686B (en) 2020-12-15 2020-12-15 Switching management device and switching management method for vehicle-mounted power supply

Publications (2)

Publication Number Publication Date
CN112590686A CN112590686A (en) 2021-04-02
CN112590686B true CN112590686B (en) 2022-06-21

Family

ID=75196017

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011477751.4A Active CN112590686B (en) 2020-12-15 2020-12-15 Switching management device and switching management method for vehicle-mounted power supply

Country Status (1)

Country Link
CN (1) CN112590686B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI790701B (en) * 2021-08-03 2023-01-21 博盛半導體股份有限公司 Electromagnetic interference regulator and method by use of capacitive parameters of field-effect transistor
CN114655147B (en) * 2022-05-05 2022-08-23 浙江春风动力股份有限公司 All-terrain vehicle
US11685323B2 (en) 2021-08-31 2023-06-27 Zhejiang CFMOTO Power Co., Ltd. Off-road vehicle
CN115891880A (en) * 2023-01-09 2023-04-04 中国第一汽车股份有限公司 Method, system and device for controlling electric quantity of battery in vehicle and vehicle
CN116513082B (en) * 2023-02-06 2023-10-13 江西新画卷科技有限公司 Automatic switching device and method for power supply of OBD intelligent equipment
CN117394520B (en) * 2023-12-11 2024-04-05 深圳市创诺新电子科技有限公司 Vehicle-mounted multifunctional energy storage power supply system, power supply method and readable storage medium

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101888114A (en) * 2010-07-14 2010-11-17 朱光怀 Multifunctional power supply of vehicular automotive electronic device
CN203554016U (en) * 2013-11-05 2014-04-16 王襄 Automatic charge/discharge switching controller for two storage batteries of automobile
CN107187407A (en) * 2017-05-24 2017-09-22 上海碧虎网络科技有限公司 A kind of mobile unit power supply mode
JP2017214039A (en) * 2016-06-02 2017-12-07 日立化成株式会社 Power supply system for vehicle and vehicle
CN107910951A (en) * 2017-12-26 2018-04-13 周伟中 A kind of automobile starting storage battery
CN110371053A (en) * 2019-08-16 2019-10-25 慧翰微电子股份有限公司 Reserve battery management system and management method built in T-BOX

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101888114A (en) * 2010-07-14 2010-11-17 朱光怀 Multifunctional power supply of vehicular automotive electronic device
CN203554016U (en) * 2013-11-05 2014-04-16 王襄 Automatic charge/discharge switching controller for two storage batteries of automobile
JP2017214039A (en) * 2016-06-02 2017-12-07 日立化成株式会社 Power supply system for vehicle and vehicle
CN107187407A (en) * 2017-05-24 2017-09-22 上海碧虎网络科技有限公司 A kind of mobile unit power supply mode
CN107910951A (en) * 2017-12-26 2018-04-13 周伟中 A kind of automobile starting storage battery
CN110371053A (en) * 2019-08-16 2019-10-25 慧翰微电子股份有限公司 Reserve battery management system and management method built in T-BOX

Also Published As

Publication number Publication date
CN112590686A (en) 2021-04-02

Similar Documents

Publication Publication Date Title
CN112590686B (en) Switching management device and switching management method for vehicle-mounted power supply
CN110970673A (en) Battery pack and battery system
CN106981914A (en) A kind of vehicle-mounted energy control method and system based on double cell
CN103427821B (en) Power management device realizing zero standby current
CN212162913U (en) Interactive DC power supply switching device, uninterrupted DC stabilized power supply and vehicle
CN211567861U (en) Automatic power supply device for storage battery of electric vehicle
CN211239354U (en) Main loop control circuit of energy storage equipment
CN212162912U (en) Back-up power supply input self-starting control circuit suitable for power distribution terminal power supply
CN111030269B (en) Energy storage type peak shifting power consumption base station power supply system
CN113937865A (en) Battery management system and power supply system
CN208896885U (en) Power battery enhancing continues a journey and prolongs insurance system
CN112208381A (en) New energy automobile charging system control circuit and control method
CN220673418U (en) Battery unit protection circuit and battery package management circuit
CN219477620U (en) Low-voltage power-off and charging activation circuit
CN216146149U (en) Standby power control circuit, system and fire control equipment
CN220873487U (en) Automobile driving relay holding circuit and automobile control circuit
CN212231110U (en) Battery charging protection circuit, battery charger and battery pack
CN216312735U (en) Battery management system and power supply system
CN219204128U (en) Charging system based on intelligent lithium battery BMS protection board
CN213906339U (en) Intelligent sound post circuit convenient to charge
CN111525649B (en) Time-sharing utilization control circuit for storage battery
CN220585979U (en) Management system, power supply device, and vehicle
CN219086871U (en) Power supply switching circuit and electric appliance
CN219164259U (en) Bluetooth headset pilot lamp power supply circuit and bluetooth headset
CN213693141U (en) Soft switch structure and power supply device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant