CN115167609B - 12V/48V double-channel MPPT solar control system and control method for motor home - Google Patents
12V/48V double-channel MPPT solar control system and control method for motor home Download PDFInfo
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- CN115167609B CN115167609B CN202210712353.9A CN202210712353A CN115167609B CN 115167609 B CN115167609 B CN 115167609B CN 202210712353 A CN202210712353 A CN 202210712353A CN 115167609 B CN115167609 B CN 115167609B
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000006243 chemical reaction Methods 0.000 claims abstract description 29
- 238000005070 sampling Methods 0.000 claims abstract description 27
- 238000001914 filtration Methods 0.000 claims description 13
- 238000004891 communication Methods 0.000 claims description 11
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical group [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 8
- 229910052744 lithium Inorganic materials 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 3
- 238000007667 floating Methods 0.000 claims description 3
- 102200088301 rs2287555 Human genes 0.000 claims 1
- 238000003745 diagnosis Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/66—Regulating electric power
- G05F1/67—Regulating electric power to the maximum power available from a generator, e.g. from solar cell
-
- 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
- H02J7/34—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering with light sensitive cells
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model provides a 12V/48V binary channels MPPT solar control system and control method for car as a house, MPPT control/drive unit's power end connects auxiliary power supply, MPPT control/drive unit's sampling end passes through first DC/DC conversion unit and second DC/DC conversion unit and connects sampling unit, sampling unit connects MCU, MCU passes through protection cell and connects MPPT control/drive unit, MPPT control/drive unit divides into two-way after connecting the PV anti-reflection unit, respectively through filter unit, DC/DC conversion unit and BATT anti-reflection unit connection 12V start battery and 48V living battery, 12V start battery and 48V living battery all connect auxiliary power supply and sampling unit. By intelligently distributing 12V/48V side charging power, simultaneous charging of a 12V battery and a 48V battery is achieved. The intelligent network system has the advantages of wide scene coverage, intelligent control, intelligent network connection, high reliability, capability of carrying out fault diagnosis reminding and the like. The system effectively ensures the power utilization of the 12V side system, and after the power utilization requirement is met, the system intelligently charges power at 48V sides respectively, and stores electric energy in 48V batteries.
Description
Technical Field
The invention belongs to the technical field of control systems, and particularly relates to a 12V/48V double-channel MPPT solar control system and control method for a motor home.
Background
The existing solar charging system of the motor home mainly comprises a 12V solar panel, a 12V controller, a 12V battery and a 48V solar panel, a 48V solar controller and a 48V battery, wherein the current system cannot charge the 12V battery and the 48V battery at the same time and has the respective defects when being used independently:
When a 12V solar charging system is configured for a 1.48V lithium battery, solar energy is wasted in low power consumption, and the 48V lithium battery cannot be charged;
when a 48V solar charging system is configured by a 2.48V lithium battery, the 48V solar charging system is required to be started for charging, BMS and DCDC conversion losses exist, and the charging efficiency is relatively low.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects of the prior art, and provide a 12V/48V double-channel MPPT solar control system and a control method for a motor home, which realize the simultaneous charging of a 12V battery and a 48V battery by intelligently distributing 12V/48V side charging power. The intelligent network intelligent system has the advantages of wide scene coverage, intelligent control, intelligent network connection, high reliability, capability of carrying out fault diagnosis reminding and the like, and meets the requirements of current automobile industry on innovation and four-in-one. The system effectively ensures the power utilization of the 12V side system, and after the power utilization requirement is met, the system intelligently charges power at 48V sides respectively, and stores electric energy in 48V batteries.
The invention provides a 12V/48V double-channel MPPT solar control system for a motor home, which comprises an MPPT control/driving unit, wherein a power end of the MPPT control/driving unit is connected with an auxiliary power supply, a sampling end of the MPPT control/driving unit is connected with the sampling unit through a first DC/DC conversion unit and a second DC/DC conversion unit, the sampling unit is connected with an MCU, the MCU is connected with the MPPT control/driving unit through a protection unit, the MPPT control/driving unit is connected with a PV anti-reflection unit and then is divided into two paths, one path is connected with a 12V starting battery through a first filtering unit, a first DC/DC conversion unit, a second filtering unit and a first BATT anti-reflection unit, the other path is connected with a 48V living battery through a third filtering unit, a second DC/DC conversion unit, a fourth filter and a second BATT anti-reflection unit, the 12V starting battery is connected with the auxiliary power supply and the sampling unit, and the auxiliary power supply, and the sampling unit and the PV anti-reflection unit are all connected with a solar panel.
As a further technical scheme of the invention, the 12V starting battery is a lead-acid battery, and the 48V living battery is a lithium battery.
Further, the MCU is respectively connected with the communication unit and the key/display unit.
Further, the PV anti-reflection unit, the filtering unit, the first DC/DC conversion unit, the second DC/DC conversion unit, the third DC/DC conversion unit, the fourth DC/DC conversion unit, the first BATT anti-reflection unit, the second BATT anti-reflection unit, the MPPT control/driving unit, the sampling unit and the protection unit form a power board, and the MCU, the MPPT control/driving unit, the communication unit, the sampling unit and the protection unit form a control board.
The invention also provides a control method of the 12V/48V double-channel MPPT solar control system for the motor home, which comprises the following steps,
S1, one path of the solar panel supplies power for the PV anti-reflection unit, and the two paths of the solar panel supply power for the battery terminal to charge and output: a 12V start-up battery and a 48V life battery;
s2, starting 12V to start battery charging, and charging with the maximum power which can be born by the battery according to the main priority; starting the battery to charge at 12V, and charging the redundant electric quantity at a secondary priority;
S3, a charging current distribution rule, a 12V charging current factory setting default value, an opening setting Imax, and a maximum XXAmax;
and S4, after the vehicle is flameout and powered off, the controller only charges the 12V starting battery, and the lithium battery is turned off at the moment. The controller starts the battery to charge for 12V according to the set Imax to a floating charge state;
And S5, when the vehicle works normally, the controller charges the 12V starting battery and the 48V living battery respectively. The 12V starting battery is charged with Imax, and the 48V living battery is charged by the residual energy; the charging current is adjusted in real time, when the 12V starting battery electric quantity is completed to be supplemented, the CV stage and the FLOAT stage are entered, and the charging current is reduced; the charging current of one path of 48V living battery is correspondingly increased.
The present invention has the advantage that,
1. Intelligent regulation: aiming at a 12V/48V power supply system, the conversion between energy situations can be reduced, the energy transmission path is reduced, and the energy utilization efficiency is improved;
2. control logic is strict, and portability is strong: the system is arranged on various motor home vehicle types, so that quick adaptation can be realized;
3. the fault diagnosis and alarm reminding functions are supported;
4. Intelligent reminding and control are supported.
Drawings
FIG. 1 is a schematic block diagram of a controller system of the present invention;
FIG. 2 is a schematic diagram of an external interface of the system according to the present invention;
FIG. 3 is a schematic diagram of a system interface relationship according to the present invention;
FIG. 4 is a main loop circuit diagram of the present invention;
FIG. 5 is a main loop topology of the present invention;
fig. 6 is a logic control state diagram of the present invention.
Detailed Description
The controller product and the optional components thereof in the embodiment are mainly used for matching a motor home power supply system so as to realize conversion control between DC/DC and obtain optimal battery charging efficiency and power control.
The controller mainly comprises an input unit, DC/DC conversion, filtering, sampling, driving, auxiliary power supply, communication, control, protection, display and the like.
The definitions of the various definitions are shown in table 1,
Table 1 controller definition table
Referring to fig. 1, the embodiment provides a 12V/48V dual-channel MPPT solar control system for a motor home, which comprises an MPPT control/driving unit, wherein a power end of the MPPT control/driving unit is connected with an auxiliary power supply, a sampling end of the MPPT control/driving unit is connected with the sampling unit through a first DC/DC conversion unit and a second DC/DC conversion unit, the sampling unit is connected with an MCU, the MCU is connected with the MPPT control/driving unit through a protection unit, the MPPT control/driving unit is connected with a PV anti-reflection unit and then is divided into two paths, one path is connected with a 12V starting battery through a first filtering unit, a first DC/DC conversion unit, a second filtering unit and a first BATT anti-reflection unit, the other path is connected with a 48V living battery through a third filtering unit, a second DC/DC conversion unit, a fourth filter and a second BATT anti-reflection unit, the 12V starting battery is connected with the auxiliary power supply and the sampling unit, and the auxiliary power supply, the sampling unit and the PV anti-reflection unit are all connected with a solar panel.
The layout and function of the system is shown in table 2,
Table 2 layout and function table of system
The 2V starting battery is a lead-acid battery, and the 48V living battery is a lithium battery.
The MCU is respectively connected with the communication unit and the key/display unit.
The PV anti-reflection unit, the filtering unit, the first DC/DC conversion unit, the second DC/DC conversion unit, the third DC/DC conversion unit, the fourth DC/DC conversion unit, the first BATT anti-reflection unit, the second BATT anti-reflection unit, the MPPT control/driving unit, the sampling unit and the protection unit form a power board, and the MCU, the MPPT control/driving unit, the communication unit, the sampling unit and the protection unit form a control board.
The external interfaces of the system are shown in fig. 2, the relation among the interfaces is shown in fig. 3,
In fig. 3, the device comprises an external PV module input interface 1, an external 12V battery input interface 2, an external 48V battery input interface 3, an external temperature sensor sampling interface 4, an external battery voltage sampling interface 5, an auxiliary power board and power board connection 6, a control board and power board connection 7, an external 485 communication interface, a CAN communication interface 8, a control board and communication board connection 9 and a control board and key/display board connection 10.
The main loop is shown in fig. 4, and the two charging channels are both technically adopting the DCDC control technology of synchronous BUCK.
Main timing:
judging charging enable charging logic- (MPPT control strategy- (CC control strategy- (CV control strategy- (FLOAT control strategy-) protection strategy);
And (3) displaying:
component status indicator lamp (charging status indicator)
Battery state indicator (Low power mode indication)
Fault indicator lamp
Protection of
The first requirement is: the fault condition fault indicator lights are on. Self-recovery after exception removal.
And the second requirement is that: and uploading the fault code under the fault condition.
The main loop topology is shown in fig. 5, and the control method of the system comprises the following steps,
S1, one path of the solar panel supplies power for the PV anti-reflection unit, and the two paths of the solar panel supply power for the battery terminal to charge and output: a 12V start-up battery and a 48V life battery;
s2, starting 12V to start battery charging, and charging with the maximum power which can be born by the battery according to the main priority; starting the battery to charge at 12V, and charging the redundant electric quantity at a secondary priority;
S3, a charging current distribution rule, a 12V charging current factory setting default value, an opening setting Imax, and a maximum XXAmax;
and S4, after the vehicle is flameout and powered off, the controller only charges the 12V starting battery, and the lithium battery is turned off at the moment. The controller starts the battery to charge for 12V according to the set Imax to a floating charge state;
And S5, when the vehicle works normally, the controller charges the 12V starting battery and the 48V living battery respectively. The 12V starting battery is charged with Imax, and the 48V living battery is charged by the residual energy; the charging current is adjusted in real time, when the 12V starting battery electric quantity is completed to be supplemented, the CV stage and the FLOAT stage are entered, and the charging current is reduced; the charging current of one path of 48V living battery is correspondingly increased.
The logic control state of the present system is shown in figure 6,
Power on：
Powering up
Reset：
1) Resetting
2) Fault restart
3) Online upgrade reset
Wait：
1) Boot self-test
2) Error reporting wait
3) Confirming operation mode and state
Charge@12V：
12V start battery charging
Idle：
Standby
Charge@48V：
48V living battery charging
Fault：
1) Abnormal communication data (re-receiving instruction)
2) Firmware upgrade abnormality (re-upgrade)
3) Program run (reset)
4) Can restore abnormality (overvoltage, undervoltage, etc.) to alarm state (restoring condition)
5) Abnormal (over-temperature, overload, short circuit, etc.) which can not be recovered by self, stopping working, waiting for manual reset
Boot：
And receiving a firmware upgrading instruction, stopping all processes, and entering an upgrading state.
When the system is used for normal operation of the vehicle, the controller charges the 12V starting battery and the 48V living battery respectively. The 12V start battery charges at Imax and the remaining energy charges the 48V living battery. Meanwhile, the charging current can be adjusted in real time, and when the 12V starting battery electric quantity is completed to be supplemented, the CV stage and the FLOAT stage are entered, and the charging current is reduced; the charging current of the 48V living battery path correspondingly increases.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the specific embodiments described above, and that the above specific embodiments and descriptions are provided for further illustration of the principles of the present invention, and that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined in the appended claims. The scope of the invention is defined by the claims and their equivalents.
Claims (5)
1. A12V/48V double-channel MPPT solar control method for a motor home is characterized by comprising the following steps,
S1, one path of the solar panel supplies power for the PV anti-reflection unit, and the two paths of the solar panel supply power for the battery terminal to charge and output: a 12V start-up battery and a 48V life battery;
s2, starting 12V to start battery charging, and charging with the maximum power which can be born by the battery according to the main priority; starting the battery to charge at 12V, and charging the redundant electric quantity at a secondary priority;
S3, a charging current distribution rule is that 12V charging current leaves a factory to set a default value, and Imax is set in an open mode;
S4, after flameout and power failure of the vehicle, the controller only charges a 12V starting battery, and at the moment, a 48V living battery is turned off; the controller starts the battery to charge for 12V according to the set Imax to a floating charge state;
S5, when the vehicle works normally, the controller charges a 12V starting battery and a 48V living battery respectively; the 12V starting battery is charged with Imax, and the 48V living battery is charged by the residual energy; the charging current is adjusted in real time, when the 12V starting battery electric quantity is completed to be supplemented, the CV stage and the FLOAT stage are entered, and the charging current is reduced; the charging current of one path of 48V living battery is correspondingly increased.
2. The control system of the 12V/48V dual-channel MPPT solar control method for a motor home according to claim 1, comprising an MPPT control/driving unit, wherein a power end of the MPPT control/driving unit is connected with an auxiliary power source, a sampling end of the MPPT control/driving unit is connected with a sampling unit through a first DC/DC conversion unit and a second DC/DC conversion unit, the sampling unit is connected with an MCU, the MCU is connected with the MPPT control/driving unit through a protection unit, the MPPT control/driving unit is connected with a PV anti-reflection unit and then is divided into two paths, one path is connected with a 12V start battery through a first filtering unit, a first DC/DC conversion unit, a second filtering unit and a first BATT anti-reflection unit, the other path is connected with a 48V living battery through a third filtering unit, a second DC/DC conversion unit, a fourth filtering unit and a second BATT anti-reflection unit, the 12V start battery is connected with the auxiliary power source and the sampling unit, and the auxiliary power source, the auxiliary power source and the PV start battery and the PV anti-reflection unit are connected with a solar panel.
3. The control system of claim 2, wherein the 12V start-up battery is a lead-acid battery and the 48V life battery is a lithium battery.
4. The control system of claim 2, wherein the MCU is connected to a communication unit and a key/display unit, respectively.
5. The control system according to claim 2, wherein the PV anti-reflection unit, the first to fourth filter units, the first DC/DC conversion unit, the second DC/DC conversion unit, the first BATT anti-reflection unit, the second BATT anti-reflection unit, the MPPT control/drive unit, the sampling unit, and the protection unit constitute a power board, and the MCU, the MPPT control/drive unit, the communication unit, the sampling unit, and the protection unit constitute a control board.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210712353.9A CN115167609B (en) | 2022-06-22 | 2022-06-22 | 12V/48V double-channel MPPT solar control system and control method for motor home |
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| CN202210712353.9A CN115167609B (en) | 2022-06-22 | 2022-06-22 | 12V/48V double-channel MPPT solar control system and control method for motor home |
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| CN115167609B true CN115167609B (en) | 2024-09-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN206678799U (en) * | 2017-03-01 | 2017-11-28 | 上海蔚来汽车有限公司 | vehicle solar charging device, system and vehicle |
| CN207251552U (en) * | 2017-02-22 | 2018-04-17 | 东汉新能源汽车技术有限公司 | Distributed MPPT solar recharging systems and solar telephone |
| CN111196235A (en) * | 2018-11-20 | 2020-05-26 | 矢崎总业株式会社 | Power Systems |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9090253B2 (en) * | 2012-01-30 | 2015-07-28 | Enow, Inc. | Method and apparatus for vehicular energy management |
| CN204167983U (en) * | 2014-03-04 | 2015-02-18 | 中国第一汽车股份有限公司 | Solar energy electric tourism caravan |
| CN108565959B (en) * | 2018-04-17 | 2020-08-21 | 厦门拓宝科技有限公司 | Service battery charging management device and method for power supply of motor home |
| AU2019100177A4 (en) * | 2019-02-17 | 2019-03-28 | Hou, Changyi MS | 2kw to 20kw Hybrid Power Systems for Recreational and Special Vehicles. This innovation relates to electrical power systems in recreational and special vehicles that don't use electrical power exclusively for locomotion. It introduces in-vehicle power generation greater than 2kw used in conjunction with renewable power sources to charge Lithium Batteries on an independent subsidiary electrical system at 48VDC with conversion to 12VDC network of appliances and energy consumers on an independent network with a battery and with conversion to 110-240V A/C network of appliances and energy consumers |
| CN210526452U (en) * | 2019-06-17 | 2020-05-15 | 深圳市华宝新能源股份有限公司 | Car as a house electrical power generating system |
| CN111446767A (en) * | 2020-04-20 | 2020-07-24 | 南京中港电力股份有限公司 | 48V power supply system applied to recreational vehicle with photovoltaic power generation |
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- 2022-06-22 CN CN202210712353.9A patent/CN115167609B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207251552U (en) * | 2017-02-22 | 2018-04-17 | 东汉新能源汽车技术有限公司 | Distributed MPPT solar recharging systems and solar telephone |
| CN206678799U (en) * | 2017-03-01 | 2017-11-28 | 上海蔚来汽车有限公司 | vehicle solar charging device, system and vehicle |
| CN111196235A (en) * | 2018-11-20 | 2020-05-26 | 矢崎总业株式会社 | Power Systems |
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