CN113595189A - Power management method, equipment and circuit of vehicle-mounted intelligent equipment - Google Patents
Power management method, equipment and circuit of vehicle-mounted intelligent equipment Download PDFInfo
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- 238000007726 management method Methods 0.000 title claims abstract description 58
- 238000006243 chemical reaction Methods 0.000 claims abstract description 39
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 37
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 37
- 230000007246 mechanism Effects 0.000 claims abstract description 9
- 230000002093 peripheral effect Effects 0.000 claims abstract description 7
- 230000006978 adaptation Effects 0.000 claims abstract description 5
- 230000005669 field effect Effects 0.000 claims description 13
- 101000716809 Homo sapiens Secretogranin-1 Proteins 0.000 claims description 9
- 102100020867 Secretogranin-1 Human genes 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 4
- 230000005059 dormancy Effects 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 4
- 230000007958 sleep Effects 0.000 claims description 3
- 238000013461 design Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 230000007774 longterm Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000002618 waking effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
- H02J7/00036—Charger exchanging data with battery
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00022—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission
- H02J13/00026—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission involving a local wireless network, e.g. Wi-Fi, ZigBee or Bluetooth
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Human Computer Interaction (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a power supply management method of vehicle-mounted intelligent equipment, which comprises a state conversion mechanism, a lithium battery charging management mechanism, a power supply adaptation selection mechanism and a power supply early warning function; the invention also provides a power management device of the vehicle-mounted intelligent device, which comprises a power supply, an MCU circuit and an intelligent device core, wherein the MCU circuit consists of a single chip microcomputer and a peripheral circuit thereof and is used for detecting an external power supply state, managing power supply and charging, communicating with the central processor and reporting the power supply state; the invention also provides a power management circuit of the vehicle-mounted intelligent device, which comprises a power conversion circuit and a lithium battery charging control circuit.
Description
Technical Field
The invention relates to the field of vehicle-mounted intelligent equipment power control, in particular to a power management method, equipment and a circuit of vehicle-mounted intelligent equipment.
Background
Along with the development of the automobile industry, the vehicle-mounted intelligent equipment is widely applied, the existing vehicle-mounted equipment is powered by a storage battery of an automobile in operation, the power consumption is large, the efficiency is low, after the battery is in power shortage, the battery is not charged in time, and the service life of the battery is short.
The storage battery capacity of the automobile is limited, and the current use of more and more vehicle-mounted equipment leads to the frequent occurrence of a feed state of the storage battery, so that the automobile can not be started normally, the service life of the storage battery is greatly shortened, and the capacity attenuation of the storage battery is accelerated.
The conventional vehicle-mounted intelligent device has no good power management strategy, and thus has the problems of high power consumption and low efficiency, so that a new power management method for the vehicle-mounted intelligent device is needed to be provided to solve the problems.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a power management method, equipment and a circuit of vehicle-mounted intelligent equipment, and at least solves part of problems in the prior art.
The invention is realized by the following steps:
the invention provides a power supply management method of vehicle-mounted intelligent equipment, the working state of the vehicle-mounted intelligent equipment comprises a shutdown state, a working state, a dormant state and a standby state,
the state transition mechanism includes:
s1, shutdown state: in a shutdown state, no electric quantity is consumed, and the lithium battery is protected from power shortage;
s2, working state: when the intelligent device is started for the first time, the intelligent device enters a working state through the access trigger of an external power supply;
s3, sleep state: when the intelligent equipment does not work, various trigger signals are detected, when the fact that all triggers are in an OFF state is detected, and after 1 minute of timing, the intelligent equipment enters a dormant state, wherein the state is a low power consumption state;
s4, standby state: when the power supply voltage is lower than 9V, the system can trigger the ultra-low voltage early warning, and close the dormancy timing awakening function, and the system enters the standby state, and in this state, the intelligent equipment can be awakened only by the ACC signal and the charging signal.
Preferably, the working state of the vehicle-mounted intelligent device further comprises a timing awakening state: after the timed awakening, the MCU firstly detects an ACC signal, if the ACC is OFF, the MCU only powers on the 4G module, only collects GPS positioning data and reports the GPS positioning data to the remote server, and then the MCU enters a dormant state.
Preferably, when the intelligent device is in a dormant state, and when the power supply harness is pulled out by a person, the intelligent device automatically wakes up, only the 4G module is started, and reports the state that the power supply harness is detached to the remote server through the 4G module, and then the intelligent device enters a shutdown state.
Preferably, when the external power supply is adopted for supplying power, the internal lithium battery can be charged, and after the external power supply is lost, the internal lithium battery supplies power, and the management mechanism for charging the lithium battery comprises the following steps:
when external power supply is adopted, the device detects that the lithium battery starts charging when the voltage is lower than 5V, stops charging when the voltage is higher than 14V, and does not charge when the lithium battery is adopted for power supply.
Preferably, the power adaptation selection mechanism comprises:
the intelligent device can be supplied with power by a 12V or 24V external power supply, when a power supply line bundle is accessed, the intelligent device switches corresponding charging and power supply circuits according to power supply voltage, and reports the power supply state to a remote server, when the 24V power supply is lower than 18V, the intelligent device switches to the 12V power supply circuit, when the 12V power supply is lower than 10V, the intelligent device switches to self-contained lithium battery power supply, when the external power supply is detected to be higher than 12V, the intelligent device switches to the 12V power supply circuit by the lithium battery power supply, and when the external power supply is detected to be higher than 24V, the intelligent device switches to the 24V power supply circuit by the 12V power supply circuit.
Preferably, the power management method of the vehicle-mounted intelligent device further comprises a power early warning function, and when the power voltage is lower than 11.5V, the detection result is uploaded to the remote server through the 4G module, and the battery low power is reported.
The invention also provides a power supply management device of the vehicle-mounted intelligent device, which comprises a power supply, an MCU circuit and an intelligent device core,
the MCU circuit consists of a singlechip and a peripheral circuit thereof, is used for detecting the external power supply state, managing the power supply and charging, communicates with the central processing unit and reports the power supply state;
the intelligent device core is a central processing unit and a peripheral circuit thereof and is used for controlling the 4G module, the WIFI module and the external camera;
and the 4G module is used for uploading the working state and the working data of the equipment to a remote server.
Preferably, the power supply comprises a built-in lithium battery and an external power supply, and the external power supply is 12V or 24V.
The invention also provides a power supply management circuit of the vehicle-mounted intelligent equipment, which comprises a power supply conversion circuit and a lithium battery charging control circuit, wherein the power supply conversion circuit comprises a first DC-DC conversion chip TP1300 and a second DC-DC conversion chip TP1301, the first DC-DC conversion chip and the second DC-DC conversion chip are electrically connected with the single chip microcomputer control signal pin 9201_ PWR _ EN, the IN port of the first DC-DC conversion chip TP1300 is electrically connected with an external VCC12V power supply, the SW port of the first DC-DC conversion chip TP1300 is electrically connected with a VDD _3V7 power supply interface, the IN port of the second DC-DC conversion chip TP1301 is electrically connected with an external VCC12V power supply, and the VCC5V power supply interface and the VDD _5V power supply interface are electrically connected with the SW port of the second DC-DC conversion chip TP 1301.
Preferably, the battery charging control circuit comprises a charging management chip U1106 and a field effect transistor Q1120, a chip microcomputer charging state pin CHR _ STATUS is electrically connected with a CHGB pin of the charging management chip U1106, the CHGB pin of the charging management chip U1106 is electrically connected with a VCC3V3 power interface through a resistor R1163, the BAT pin of the charging management chip U1106 is electrically connected with a lithium battery, a 1 st pin, a 2 nd pin, a 5 th pin, a 6 th pin and a 7 th pin of the field effect transistor Q1120 are electrically connected with a VCC pin of the charging management chip U1106, a 4 th pin and an 8 th pin of the field effect transistor Q1120 are electrically connected with a VDD _5V power interface, and a 4 th pin and an 8 th pin of the field effect transistor Q1120 are electrically connected with a single chip microcomputer battery charging enable interface BAT _ CE.
The invention has the following beneficial effects:
1. the invention provides a power management design and a power management strategy of vehicle-mounted intelligent equipment, which are used for improving the working efficiency of a battery of the vehicle, reducing the power consumption of the equipment, ensuring that a vehicle storage battery is not in a long-term power shortage state and prolonging the service life of the battery.
2. The invention provides a power management design and a strategy of vehicle-mounted intelligent equipment, wherein the design is mainly based on a new power hardware design scheme, and different working states of the equipment are switched through related software strategies, so that the power consumption of the intelligent equipment is reduced, the purpose of long-time working of a battery is realized, and the service life of the battery is prolonged.
3. The invention can make the equipment enter different states according to the power supply condition of the external power supply and the self working condition, thereby effectively reducing the power consumption, improving the working efficiency of the battery of the machine and prolonging the working time of the equipment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a hardware block diagram of the present invention provided by an embodiment of the present invention;
FIG. 2 is a flow chart of state transition provided by an embodiment of the present invention;
fig. 3 is a flowchart illustrating a lithium battery charging management method according to an embodiment of the present invention;
FIG. 4 is a diagram of a power adaptation process (power detection and alarm) provided by an embodiment of the present invention;
fig. 5 is a first power management circuit diagram (power conversion circuit) according to an embodiment of the present invention;
FIG. 6 is an enlarged view of portion A of FIG. 5 according to an embodiment of the present invention;
FIG. 7 is an enlarged view of portion B of FIG. 5 according to an embodiment of the present invention;
FIG. 8 is an enlarged view of portion C of FIG. 5 according to an embodiment of the present invention;
FIG. 9 is an enlarged view of portion D of FIG. 5 according to an embodiment of the present invention;
fig. 10 is a second power management circuit diagram (lithium battery charging control circuit) according to an embodiment of the present invention;
FIG. 11 is an enlarged view of section E of FIG. 10 in accordance with an embodiment of the present invention;
fig. 12 is an enlarged view of portion F of fig. 10 according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, 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 invention.
Referring to fig. 1-12, the device is mainly divided into 3 parts, a power supply, an MCU circuit and an intelligent device core, referring to fig. 1. The system is powered by two power supplies, one is an external 12V or 24V power supply, the other is a built-in lithium battery, when the external power supply is adopted for supplying power, the internal lithium battery can be charged, and when the external power supply is lost, the internal lithium battery supplies power.
The MCU circuit consists of a singlechip S32K144 and peripheral circuits thereof, and is used for finishing detection of external power supply state, power supply management and charging management, communicating with the central processing unit and reporting the power supply state.
The intelligent device core: the central processing unit (main CPU) and the peripheral circuit mainly control functional circuits such as a 4G module, a WIFI module and an external 4 cameras. The central processing unit is a control chip of a CAN bus, and the central processing unit adopts a cool-core micro AR9201 chip.
The working state and working data of the equipment can be uploaded to a remote server through a 4G module, and the equipment configuration can also be set through the remote server.
The principle of power management:
the system can work in 5 states, including off state, working state, dormant state, timing awakening state and standby state.
1. As in fig. 2, state transitions:
shutdown state: in a shutdown state, no electric quantity is consumed, the lithium battery is protected from power shortage, and the equipment is in a default state when leaving a factory.
The working state is as follows: when the intelligent device is started for the first time, the intelligent device enters a working state through the access trigger of an external power supply.
A dormant state: when the intelligent equipment does not work, various trigger signals can be detected, when the intelligent equipment detects that all triggers are in an OFF state and counts for 1 minute, the intelligent equipment enters a dormant state, and the power consumption is extremely low in the state.
Standby state: when the power supply voltage is lower than 9V, the system can trigger the ultra-low voltage early warning, and close the dormancy timing awakening function, and the system enters a standby state. In this state, the device needs ACC signal and charging signal to wake up.
ACC is a gear signal of the automobile, and the gear is 'the gear signal can supply power to a distributor inside the automobile without starting the automobile'; ACC gear: when the key is turned to the position, the circuit for the accessory is connected, and equipment such as a radio can be used. The ACC state is to turn on the power of electrical equipment of the automobile part, such as a CD, an air conditioner, etc. In the present invention, ACC is defined as turning a vehicle key to the ACC gear.
A timed awakening state: the system is awakened every 6 minutes (12 hours) by default in dormancy, after the system is awakened regularly, the MCU firstly detects an ACC signal, if the ACC is OFF, the MCU only powers on the 4G module, other parts (a main CPU, a camera, WiFi, Audio and CAN buses) are not powered on, only GPS positioning data is collected and reported to a server, and then the system enters a dormant state. The timing wake-up period and the wake-up maintaining time can be configured through a remote server, the default wake-up period of the factory is 12 hours, and the maintaining time after wake-up is 6 minutes.
Entering a shutdown state: when the equipment is in a dormant state, when the power supply harness is pulled out by a person, the equipment automatically wakes up, only the 4G module is started, the state that the power supply harness is detached is reported to a remote server through the 4G module, and then the equipment enters a shutdown state.
The awakening mode comprises the following steps: there are four wake-up modes for sleep: ACC signals, charging, door magnetic induction starting (a magnetic sensor when a vehicle door is opened and closed), and CAN bus waking up, and entering into a working state after waking up.
2. Charging management:
when external power supply is adopted, the device detects that the lithium battery starts charging when the voltage is lower than 5V, and stops charging when the voltage is higher than 14V. When the lithium battery is adopted for power supply, the battery is not charged, and the flow is shown in the attached figure 3.
3. Power supply adaptation:
the system may be powered by a 12V or 24V external power source, and when a power harness is accessed, the system switches the corresponding charging and power supply circuits according to the power supply voltage and reports the power status to the remote server. When the 24V power supply is lower than 18V, the power supply is switched to the 12V power supply, and when the 12V power supply is lower than 10V, the power supply is switched to the power supply with the lithium battery, and the flow is shown in the figure 4.
4. Power supply early warning:
when the power supply voltage is lower than 11.5V, the low battery level is reported to the remote server, and early warning is given.
As shown in fig. 5-9, the first DC-DC conversion chip and the second DC-DC conversion chip both adopt MP4423HGQ-Z, both DC-DC conversion chips MP4423HGQ-Z are electrically connected with the one-chip microcomputer control signal pin 9201_ PWR _ EN, and the one-chip microcomputer S32K144 controls the two MP4423HGQ-Z to enable or shut down.
The two DC-DC conversion chips MP4423HGQ-Z are respectively responsible for converting an external power supply VCC12V into 5V and 3.7V required by the inside, VCC5V supplies power to a CAN interface chip, VDD _3V7 is supplied to a power management chip DA9062, and the power is converted into other groups of power supplies (1.2V, 1.8V and 3.3V) for use by other devices. VDD _5V is used to power the internal lithium battery.
As in fig. 10-12, the WS4509EH chip is a charge management chip; the CHGB pin of the WS4509EH chip is connected with the single chip microcomputer, the CHR _ STATUS represents a charging state, the CHR _ STATUS is connected with the single chip microcomputer, and the pin is low during charging; the CHGB pin of the WS4509EH chip is electrically connected with a power supply VCC3V3 through a resistor R1163, the power supply VCC3V3 is obtained by VDD _3V7 through conversion of a power management chip DA9062, the CHGB pin of the WS450 4509EH chip is set high through R1163, and the initial state of CHR _ STATUS is marked as uncharged; BAT _ CE is a single-chip microcomputer battery charging enabling interface; the BAT pin of the WS4509EH chip is electrically connected with the lithium battery to charge the lithium battery, and the BAT _ CE battery is enabled to charge and connected to the singlechip and controlled by the singlechip; VDD _5V is electrically connected to the VCC pin of WS4509EH chip through FET Q1120.
The power management circuit of the vehicle-mounted intelligent device comprises a power conversion circuit and a lithium battery charging control circuit, as shown IN fig. 5-9, the power conversion circuit comprises a first DC-DC conversion chip TP1300 and a second DC-DC conversion chip TP1301, the first DC-DC conversion chip and the second DC-DC conversion chip are both electrically connected with a single chip microcomputer control signal pin 9201_ PWR _ EN, an IN port of the first DC-DC conversion chip TP1300 is electrically connected with an external VCC12V power supply, a SW port of the first DC-DC conversion chip TP1300 is electrically connected with a VDD _3V7 power supply interface, an IN port of the second DC-DC conversion chip TP1301 is electrically connected with an external VCC12V power supply, and a VCC5V power supply interface and a VDD _5V power supply interface are both electrically connected with a SW port of the second DC-DC conversion chip TP 1301.
As shown in fig. 10-12, the battery charging control circuit includes a charging management chip U1106 and a field effect transistor Q1120, the single chip microcomputer charging state pin CHR _ STATUS is electrically connected to the CHGB pin of the charging management chip U1106, the CHGB pin of the charging management chip U1106 is electrically connected to the VCC3V3 power interface through a resistor R1163, the BAT pin of the charging management chip U1106 is electrically connected to the lithium battery, the 1 st pin, the 2 nd pin, the 5 th pin, the 6 th pin, and the 7 th pin of the field effect transistor Q1120 are electrically connected to the VCC pin of the charging management chip U1106, the 4 th pin and the 8 th pin of the field effect transistor Q1120 are electrically connected to the VDD _5V power interface, and the 4 th pin and the 8 th pin of the field effect transistor Q1120 are electrically connected to the single chip microcomputer battery charging enable interface BAT _ CE.
In this embodiment, the first DC-DC conversion chip TP1300 and the second DC-DC conversion chip TP1301 both adopt MP4423HGQ-Z chips, the charge management chip U1106 adopts WS4509EH chips, and the field effect transistor Q1120 adopts WPM1481 chips.
The invention provides a power management design and strategy of vehicle-mounted intelligent equipment, which improves the working efficiency of a battery of the vehicle-mounted intelligent equipment, reduces the power consumption of the equipment, ensures that an automobile storage battery is not in a long-term power shortage state and prolongs the service life of the battery.
The invention provides a power management design and a strategy of vehicle-mounted intelligent equipment, wherein the design is mainly based on a new power hardware design scheme, and different working states of the equipment are switched through related software strategies, so that the power consumption of the intelligent equipment is reduced, the purpose of long-time working of a battery is realized, and the service life of the battery is prolonged.
The invention can make the equipment enter different states according to the power supply condition of the external power supply and the self working condition, thereby effectively reducing the power consumption, improving the working efficiency of the battery of the machine and prolonging the working time of the equipment.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A power management method of vehicle-mounted intelligent equipment is characterized by comprising the following steps: the working state of the vehicle-mounted intelligent equipment comprises a shutdown state, a working state, a dormant state and a standby state,
the state transition mechanism includes:
s1, shutdown state: in a shutdown state, no electric quantity is consumed, and the lithium battery is protected from power shortage;
s2, working state: when the intelligent device is started for the first time, the intelligent device enters a working state through the access trigger of an external power supply;
s3, sleep state: when the intelligent equipment does not work, various trigger signals are detected, when the fact that all triggers are in an OFF state is detected, and after 1 minute of timing, the intelligent equipment enters a dormant state, wherein the state is a low power consumption state;
s4, standby state: when the power supply voltage is lower than 9V, the system can trigger the ultra-low voltage early warning, and close the dormancy timing awakening function, and the system enters the standby state, and in this state, the intelligent equipment can be awakened only by the ACC signal and the charging signal.
2. The power management method of the vehicle-mounted intelligent device according to claim 1, characterized in that: the working state of the vehicle-mounted intelligent equipment further comprises a timing awakening state: after the timed awakening, the MCU firstly detects an ACC signal, if the ACC is OFF, the MCU only powers on the 4G module, only collects GPS positioning data and reports the GPS positioning data to the remote server, and then the MCU enters a dormant state.
3. The power management method of the in-vehicle smart device according to claim 2, characterized in that: when the intelligent equipment is in a dormant state, when the power supply harness is pulled out by a person, the intelligent equipment can automatically wake up, only the 4G module is started, the state that the power supply harness is detached is reported to the remote server through the 4G module, and then the intelligent equipment enters a shutdown state.
4. The power management method of the vehicle-mounted intelligent device according to claim 1, characterized in that: when the power supply that adopts external power source, can charge to inside lithium cell, after losing external power source power supply, by inside lithium cell power supply, the management mechanism to lithium cell charging includes:
when external power supply is adopted, the device detects that the lithium battery starts charging when the voltage is lower than 5V, stops charging when the voltage is higher than 14V, and does not charge when the lithium battery is adopted for power supply.
5. The power management method of the vehicle-mounted intelligent device according to claim 1, characterized in that: the power adaptation selection mechanism comprises:
the intelligent device can be supplied with power by a 12V or 24V external power supply, when a power supply line bundle is accessed, the intelligent device switches corresponding charging and power supply circuits according to power supply voltage, and reports the power supply state to a remote server, when the 24V power supply is lower than 18V, the intelligent device switches to the 12V power supply circuit, when the 12V power supply is lower than 10V, the intelligent device switches to self-contained lithium battery power supply, when the external power supply is detected to be higher than 12V, the intelligent device switches to the 12V power supply circuit by the lithium battery power supply, and when the external power supply is detected to be higher than 24V, the intelligent device switches to the 24V power supply circuit by the 12V power supply circuit.
6. The power management method of the in-vehicle smart device according to claim 5, wherein: the power supply early warning function is further included, when the power supply voltage is lower than 11.5V, the detection result is uploaded to the remote server through the 4G module, and the low battery level of the battery is reported.
7. The utility model provides a power management equipment of on-vehicle smart machine which characterized in that: comprises a power supply, an MCU circuit and an intelligent equipment core,
the MCU circuit consists of a singlechip and a peripheral circuit thereof, is used for detecting the external power supply state, managing the power supply and charging, communicates with the central processing unit and reports the power supply state;
the intelligent device core is a central processing unit and a peripheral circuit thereof and is used for controlling the 4G module, the WIFI module and the external camera;
and the 4G module is used for uploading the working state and the working data of the equipment to a remote server.
8. The power management device of the in-vehicle smart device of claim 7, wherein: the power supply comprises a built-in lithium battery and an external power supply, and the external power supply is 12V or 24V.
9. The utility model provides a power management circuit of on-vehicle smart machine which characterized in that: the power conversion circuit comprises a first DC-DC conversion chip TP1300 and a second DC-DC conversion chip TP1301, wherein the first DC-DC conversion chip and the second DC-DC conversion chip are electrically connected with a single chip microcomputer control signal pin 9201_ PWR _ EN, an IN port of the first DC-DC conversion chip TP1300 is electrically connected with an external VCC12V power supply, a SW port of the first DC-DC conversion chip TP1300 is electrically connected with a VDD _3V7 power supply interface, an IN port of the second DC-DC conversion chip TP1301 is electrically connected with an external VCC12V power supply, and a VCC5V power supply interface and a VDD _5V power supply interface are electrically connected with a SW port of the second DC-DC conversion chip TP 1301.
10. The power management circuit of the in-vehicle smart device of claim 9, wherein: the battery charging control circuit comprises a charging management chip U1106 and a field-effect tube Q1120, a SCM charging state pin CHR _ STATUS is electrically connected with a CHGB pin of the charging management chip U1106, the CHGB pin of the charging management chip U1106 is electrically connected with a VCC3V3 power interface through a resistor R1163, a BAT pin of the charging management chip U1106 is electrically connected with a lithium battery, a 1 st pin, a 2 nd pin, a 5 th pin, a 6 th pin and a 7 th pin of the field-effect tube Q1120 are electrically connected with the VCC pin of the charging management chip U1106, a 4 th pin and an 8 th pin of the field-effect tube Q1120 are electrically connected with a VDD _5V power interface, and a 4 th pin and an 8 th pin of the field-effect tube Q1120 are electrically connected with a SCM battery charging enable interface BAT _ CE.
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