CN107276407B - PTC power management system for electric automobile - Google Patents
PTC power management system for electric automobile Download PDFInfo
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- CN107276407B CN107276407B CN201710656852.XA CN201710656852A CN107276407B CN 107276407 B CN107276407 B CN 107276407B CN 201710656852 A CN201710656852 A CN 201710656852A CN 107276407 B CN107276407 B CN 107276407B
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- 239000003990 capacitor Substances 0.000 claims description 94
- 230000000087 stabilizing effect Effects 0.000 claims description 23
- 238000012545 processing Methods 0.000 claims description 11
- 230000002457 bidirectional effect Effects 0.000 claims description 6
- 230000006698 induction Effects 0.000 claims description 2
- 230000001360 synchronised effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 5
- 238000004378 air conditioning Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000009123 feedback regulation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/157—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators with digital control
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/1566—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators with means for compensating against rapid load changes, e.g. with auxiliary current source, with dual mode control or with inductance variation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Direct Current Feeding And Distribution (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
A PTC power management system for an electric automobile belongs to the electric control field of new energy electric automobiles. The PTC power management system for the electric automobile comprises a system power input end, an input power unit, an up-down power mode unit, an output power unit and a main control unit; the input power supply unit comprises a voltage division acquisition circuit for providing input for the main control unit, a time sequence power supply circuit for supplying power to the power-on and power-off mode unit and a main switch circuit respectively connected with the main control unit and the electric automobile controller; the system power supply input end is respectively connected with the voltage division acquisition circuit and the time sequence power supply circuit, the time sequence power supply circuit is connected with the main switch circuit, the main switch circuit also outputs two paths of signals, one path of mode input signals are input into the up-down power mode unit, and the other path of pull signals are input into the output power supply unit; the power-on and power-off mode unit outputs power to the main control unit; the output power supply unit outputs power to the PTC driving power supply. The invention carries out dynamic load modulation, reduces energy loss, improves the reliability of the power management system and prolongs the service life of the power management system.
Description
Technical Field
The invention relates to the technical field of electric control for new energy electric automobiles, in particular to a PTC power management system for an electric automobile.
Background
The current endurance mileage of the electric automobile is increased from more than one hundred kilometers to about three hundred kilometers at present, and according to the development of the current technology, the endurance mileage is estimated to be about 500 kilometers in 2020. Therefore, each time of improvement of the technology is always to optimize the endurance mileage and reduce the energy consumption, and the energy consumption of the comfort air conditioning system is reduced as much as possible except that the power system consumes energy to drive the vehicle to run, so that the technical problem which is urgent to be solved currently is solved.
The PTC belongs to a particularly important part in an electric automobile, belongs to a heating part in an air conditioning system, and is also a part with relatively large energy consumption, and the power of the PTC is different from a few kilowatts to ten kilowatts and corresponds to a whole automobile, so that if reasonable power management is not added and the power on and off of the PTC is effectively controlled and distributed, the battery performance of the electric automobile is greatly influenced, the driving range of the whole automobile is further influenced, the energy consumed by the PTC system is reduced by about 12% according to the current practical experience, and different vehicles are slightly different. This will have a relatively large impact on the range of the vehicle.
In the traditional mechanical control scheme, electronic mode control cannot be adopted, so that the electronic mode control is gradually eliminated by various large-scale factories, almost every host factory and some spare part suppliers are developing similar products from the current knowledge, and the difficulty of the products is that communication with a vehicle controller and overall system power management are needed. The whole vehicle factory is generally unfamiliar to the power supply of the novel control system of the parts, especially, the existing whole vehicle controller is generally developed and controlled by the host factory, and as the suppliers of the parts are unfamiliar with the control strategy and the specific scheme of the whole control system, the whole vehicle controller is difficult to realize the light-weight product, has complete functions and high efficiency, is not efficient in power supply management, has high cost, and cannot meet the market demand of the new energy electric vehicle, so that the novel PTC power supply management system controlled by the novel automatic control high-efficiency power supply system is needed to realize the urgent demand.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides a PTC power management system for an electric automobile.
The invention is realized by the following technical scheme:
the PTC power management system for the electric automobile comprises a system power input end, an input power unit, an up-down power mode unit, an output power unit and a main control unit; the input power supply unit comprises a voltage division acquisition circuit for providing input for the main control unit, a time sequence power supply circuit for supplying power to the power-on and power-off mode unit, and a main switch circuit respectively connected with the main control unit and the electric automobile controller; the system power supply input end is respectively connected with the voltage division acquisition circuit and the time sequence power supply circuit, the time sequence power supply circuit is connected with the main switch circuit, the main switch circuit also outputs two paths of signals, one path of mode input signals are input to the power-on and power-off mode unit, and the other path of pull signals are input to the output power supply unit; the power-on and power-off mode unit outputs power to the main control unit; the output power supply unit outputs power to the PTC driving power supply.
Preferably, the voltage division acquisition circuit comprises a first resistor, a second resistor and a first capacitor; and the system power input end is respectively connected with the second resistor and the first capacitor through the first resistor and then grounded.
Preferably, the time sequence power supply circuit comprises a second capacitor, a third capacitor, a first inductor, a fourth capacitor and a fifth capacitor; the system power supply input end is connected with the first inductor after passing through the second capacitor and the third capacitor which are connected in parallel, and the first inductor is grounded after being connected with the fourth capacitor and the fifth capacitor which are connected in parallel.
Preferably, the input power supply unit further includes a signal processing circuit composed of a fourteenth capacitor, a bidirectional regulator, and a first diode; the system power input end is grounded through the fourteenth capacitor and the bidirectional voltage stabilizing tube respectively, and the system power input end is connected with the time sequence power supply circuit through the first diode.
Preferably, the main switch circuit comprises a third resistor, a fourth resistor, a sixth capacitor, a first zener diode and a first MOS transistor; the third resistor is connected in parallel between the fourth resistor and the sixth capacitor, and the common output end of the third resistor and the fourth resistor is respectively connected with the main control unit and the electric automobile controller; the drain electrode of the first MOS tube is connected with the cathode of the first Zener diode, the anode of the first Zener diode is connected with the fourth resistor, the grid electrode of the first MOS tube is connected with the anode of the first Zener diode, and the source electrode of the first MOS tube is used for respectively outputting a mode input signal and a pull-up signal.
Preferably, the source electrode of the first MOS transistor is filtered by the filter circuit before outputting the mode input signal and the pull-up signal.
Preferably, the power-on/off mode unit comprises a first voltage stabilizing circuit, a first switch circuit, an interface power supply circuit and a voltage-reduction power supply circuit; the main switching circuit outputs a mode input signal to the first voltage stabilizing circuit, the first switching circuit and the interface power supply circuit in sequence; the main switch circuit also outputs a mode input signal to the step-down power supply circuit; the time sequence power supply circuit outputs a time sequence power supply signal to the first switch circuit.
Preferably, the output power supply unit comprises a second voltage stabilizing circuit, a load dynamic adjusting circuit and a flyback circuit; the pull-up signal is connected with the load dynamic adjusting circuit and the flyback circuit through the second voltage stabilizing circuit respectively, and the flyback circuit outputs power to the PTC driving power supply.
Preferably, the load dynamic adjustment circuit includes a PWM chip, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor, a second MOS transistor, and a second diode; the running end of the PWM chip is connected with the second voltage stabilizing circuit through the fifth resistor and grounded through the sixth resistor; the threshold current end of the PWM chip is grounded through the seventh resistor and the eighth capacitor in sequence; the feedback end of the PWM chip is grounded through the eighth resistor respectively, the feedback end of the PWM chip is connected with the cathode of the second diode through the tenth resistor, and the anode of the second diode is connected with the flyback circuit; the frequency end of the PWM chip is grounded through the ninth resistor; the mode end/synchronous end of the PWM chip is grounded through the tenth capacitor; the input power end of the PWM chip is grounded through the tenth capacitor; the induction end of the PWM chip is respectively connected with the twelfth capacitor and the twelfth resistor; the voltage input end is grounded through the eleventh capacitor and connected with the second voltage stabilizing circuit through the eleventh resistor; the gate end of the PWM chip is connected with the gate of the second MOS tube, the source electrode of the second MOS tube is sequentially connected with the fourteenth resistor and the thirteenth capacitor to be grounded, and the source electrode of the second MOS tube is also connected with the flyback circuit; the drain electrode of the second MOS tube is respectively connected with the twelfth resistor and the thirteenth resistor; the twelfth capacitor and the thirteenth resistor are grounded, respectively.
Preferably, the output power supply unit further comprises a filter circuit, and the filter circuit is connected between the load dynamic adjusting circuit and the flyback circuit, so that the invention has the following beneficial effects:
the PTC power management system for the electric automobile utilizes a high-efficiency power chip and PWM output and performs input-output-load dynamic modulation through reasonable circuit interface matching design, and scientifically manages energy. According to the feedback of the current, voltage and other acquisition and diagnosis loops to the main control unit and the power chip, the PWM adjustment output voltage response is dynamically adjusted in real time according to the analysis of the system algorithm to form automatic control, and the power-on and power-off time is controlled according to the air conditioning system, the device enters different modes, can efficiently realize adjustment, reduces energy loss, brings high service life and high efficiency, has simple design and high reliability, realizes low cost and high efficiency, and well solves a series of problems of management control, cost, reliability and the like.
Drawings
FIG. 1 is a schematic block diagram of a PTC power management system for an electric vehicle according to the present invention;
fig. 2 is a circuit diagram of an input power unit of the PTC power management system for an electric vehicle according to the present invention;
fig. 3 is a circuit diagram of a power-on/power-off mode unit of the PTC power management system for an electric vehicle according to the present invention;
fig. 4 is a circuit diagram of an output power supply unit of the PTC power management system for an electric vehicle according to the present invention;
fig. 5 is a block diagram showing power supply signals in the PTC power management system for an electric vehicle according to the present invention.
Detailed Description
The following are specific embodiments of the present invention and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
Referring to fig. 1, the PTC power management system for an electric vehicle according to the present invention includes an input power unit, an up-down power mode unit, an output power unit, and a main control unit. The system power input terminal, which is typically 9-16V supplied by an external small battery, is input to the power management system. The input power supply unit is respectively connected with the power-on and power-off mode unit, the output power supply unit and the main control unit.
The main control unit comprises an MCU and peripheral circuits thereof. The MCU generally adopts a MC9S12G64 type chip.
Referring specifically to fig. 2-5, the input power supply unit includes a voltage division acquisition circuit, a time sequence power supply circuit, and a main switch circuit. One path of system power supply input end KL30 is connected with the main SWITCH circuit through the time sequence power supply circuit, specifically, the path outputs KL_30FILT to the power-on and power-off mode unit through the time sequence power supply circuit to provide time sequence power supply input for the power-on and power-off mode unit, and outputs PSU signals to the main control unit and the electric automobile controller respectively through the main SWITCH circuit on the one hand, and outputs mode input signals KL30_SWITCH to the power-on and power-off mode unit and outputs pull-up signals KL30_PULLLUP to the output power supply unit on the other hand; the other path is connected with the partial pressure acquisition circuit, provides input for the main control unit, monitors the dynamic input of the external small battery, and adjusts and protects the external small battery according to specific transient load. The power-on/off mode unit outputs 5V_SWITCH to supply to an interface connected with the main control unit and to collect power, and outputs 5V_CORE to supply to the main control unit and can power in the electric automobile. The output power supply unit outputs power to the PTC driving power supply. The PSU signal output end is respectively connected with the main control unit and the electric automobile controller through the KL15 switch circuit, and is used for maintaining the working state of the loop by keeping the low level after the power of the KL15 is off after the work; power-down protection and wake-up functions, etc.
As shown in fig. 2, the voltage division collecting circuit includes a first resistor R63, a second resistor R64, and a first capacitor C53. The system power input KL30 is connected to the second resistor R64 and the first capacitor C53 via the first resistor R63, and then grounded. The input source is fed back through the sampling resistor and then enters the main control system for monitoring, and when the input source is detected to be too high or too low, the input source enters the corresponding load control output.
The time sequence power supply circuit comprises a second capacitor C43, a third capacitor C44, a first inductor L1, a fourth capacitor C41 and a fifth capacitor C42. The system power input KL30 is connected to the first inductor L1 after passing through the second capacitor C43 and the third capacitor C44 which are connected in parallel, and the first inductor L1 is grounded after being connected to the fourth capacitor C41 and the fifth capacitor C42 which are connected in parallel. And the power supply of the system power supply input end KL30 is filtered by the time sequence power supply circuit and then outputs KL_30FILT to the power-on and power-off mode unit.
The main switching circuit comprises a third resistor R57, a fourth resistor R58, a sixth capacitor C49, a first zener diode Z1 and a first MOS tube Q1. The sixth capacitor C49 and the first zener diode Z1 are connected in parallel and then connected in series with the fourth resistor R58. The third resistor R57 is connected in parallel between the fourth resistor R58 and the sixth capacitor C49. And the common output end of the third resistor R57 and the fourth resistor R58 is a PSU end and is respectively connected with the main control unit and the electric automobile controller. The drain electrode of the first MOS transistor Q1 is connected with the cathode of the first Zener diode Z1, the anode of the first Zener diode Z1 is connected with the fourth resistor R58, and the grid electrode of the first MOS transistor Q1 is connected with the anode of the first Zener diode Z1. The source electrode of the first MOS transistor Q1 is configured to output a mode input signal kl30_switch and a pull-up signal kl30_pulse, respectively.
In order to obtain a cleaner power input, a signal processing circuit is arranged before the time sequence power supply circuit. The signal processing circuit comprises a fourteenth capacitor C50, a bidirectional voltage regulator D7 and a first diode D5. The system power input end is grounded through the fourteenth capacitor C50 and the bidirectional voltage regulator D7 respectively, and the system power input end KL30 is connected with the time sequence power supply circuit through the first diode D5. The signal processing circuit is used for carrying out front-stage transient absorption and rectification on power supply from a small battery, and the processed power supply is provided for a rear-stage circuit.
In order to output the steady mode input signal kl30_switch and the pull-up signal kl30_pull, the source electrode of the first MOS transistor Q1 is filtered by a filter circuit before outputting the steady mode input signal and the pull-up signal. For example, one end of the capacitor is connected with the source electrode of the first MOS tube, and the other end of the capacitor is grounded. In addition, a unidirectional voltage regulator D6 is connected between the mode input signal kl30_switch and the pull-up signal kl30_pulse, the anode terminal is connected to the mode input signal kl30_switch, and the cathode terminal is connected to the pull-up signal kl30_pulse, so as to protect the stable output of the power supply.
When the KL30 input from the small battery voltage is normal, the voltage is generally between 9 and 16V, usually about 13V, and the anti-surge and filtering absorption treatment is performed by the signal processing circuit. The processed signals are transmitted to the main control unit and the electric automobile controller through the voltage division acquisition circuit, and the signals are output by the power supply KL30_FILT through the time sequence power supply circuit to provide time sequence power supply input for the power supply of the later mode as input, and then the signals are transmitted through the main switch circuit. On one hand, the main switch circuit outputs PSU signals, and the power supply output by the time sequence power supply circuit is triggered by the enabling signals of the electric automobile controller, so that the PSU terminal is in a low level. The power management system is in a low power consumption mode, and outputs such as loads are not activated; when the first MOS tube is conducted, two paths of power supply outputs are formed; the two power supply circuits output by the main SWITCH circuit are kl30_switch and kl30_pulllup respectively, and the kl30_switch and kl30_pulllup are output to the power-on/power-off mode unit and the output power supply unit as primary.
As shown in fig. 3, the power up and down mode unit includes a first voltage stabilizing circuit, a first switch circuit, an interface power supply circuit, and a step-down power supply circuit. And the main switching circuit outputs a mode input signal to the first voltage stabilizing circuit, the first switching circuit and the interface power supply circuit in sequence. The main switch circuit also outputs a mode input signal to the buck power supply circuit. The time sequence power supply circuit outputs a time sequence power supply signal to the first switch circuit.
Specifically, the first voltage stabilizing circuit includes a third diode D8, a fourteenth resistor R69, and a fifteenth resistor R68.Kl30_switch is connected to the cathode of the third diode D8, and the anode of the third diode D8 is connected to the fourteenth resistor R69 and to ground and also connected to the first switching circuit via the fifteenth resistor R68.
The first switch circuit comprises a first triode Q5, a sixteenth resistor R65, a third MOS tube Q6, a seventeenth resistor R66, an eighteenth resistor R67, a second Zener diode Z2 and a fourth MOS tube Q4. The base electrode of the first triode Q5 is connected with the fifteenth resistor R68, the collector electrode of the first triode Q5 is respectively connected with the sixteenth resistor R65, the grid electrode of the third MOS tube Q6 and the interface power supply circuit, and the emitter electrode of the first triode Q5 is connected with the drain electrode of the third MOS tube Q6. The source electrode of the third MOS tube Q6 is respectively connected with the seventeenth resistor R66 and the eighteenth resistor R67; one end of the eighteenth resistor R67 is connected with the source electrode of the third MOS transistor Q6, the other end of the eighteenth resistor R67 is connected with the anode of the second Zener diode Z2, and the other end of the eighteenth resistor R67 is also connected with the grid electrode of the fourth MOS transistor. And the drain electrode of the fourth MOS tube is connected with an interface power supply circuit. Kl_30filt is respectively connected with the source electrode of the fourth MOS tube, the cathode of the second zener diode Z2, the sixteenth resistor R6 and the seventeenth resistor R66.
The interface power supply circuit comprises a fourth diode D10, a nineteenth resistor R70, a twentieth resistor R72, a fifth MOS tube Q7, a fifteenth capacitor C56 and a twenty-first resistor R71. The collector of the first triode Q5 is connected with the cathode of the fourth diode D10, the anode of the fourth diode D10 is connected with the grid electrode of the fifth MOS tube Q7 through the nineteenth resistor R70, the source electrode of the fifth MOS tube Q7 is connected with the grid electrode of the fifth MOS tube Q7 through the twentieth resistor R72, and the source electrode of the fifth MOS tube Q7 is connected with the step-down power supply circuit. The drain connection 5V_SWITCH, 5V_SWITCH of the fifth MOS transistor Q7 is further grounded via the fifteenth capacitor C56 and the twenty-first resistor R71, respectively.
The step-down power supply circuit includes a step-down chip IC2, a sixteenth capacitor C60, a seventeenth capacitor C61, and a twenty-second resistor R73.Kl30_switch is connected to the input terminal IN of the buck chip IC2 through a unidirectional voltage regulator D11, the DELAY terminal DELAY of the buck chip IC2 is grounded through the sixteenth capacitor C60, and the output terminal of the buck chip IC2 outputs 5v_core. The RO end of the buck chip is grounded through the seventeenth capacitor C61. And the twenty-second resistor R73 is connected between the RO end and the output end of the buck chip.
When the input kl30_switch enters the third diode D8 to stabilize voltage, the input kl30_switch is provided to the first triode Q5 as a switch input control and is output with a low level when the input kl30_switch is valid, the fourth diode D10 is also low level, the gate of the third MOS transistor Q6 is also low level, the eighteenth resistor R67 is input to be high, the source of the third MOS transistor Q6 is high, when the kl30_switch is high, the buck chip IC2 is input with a high level, the buck chip IC2 outputs to be valid and forms a 5v_core power supply, the power supply is input to the fifth MOS transistor Q7, at this time and when the kl30_switch is high, the base of the first triode Q5 is high to be valid, the collector of the Q5 is low, at this time, the 5v_core is valid, the fourth diode D10 is turned on, the gate of the fifth MOS transistor Q7 is high, and after the fifth MOS transistor Q7 is turned on, the power supply 5v is output. Wherein, the 5V_core supplies power for the master control, can communication and the like. The 5V_switch output supplies power to ports such as I/0. The 5V_core and the 5V_switch power supply respectively form closed-loop control for the main control unit through the acquisition feedback circuit (refer to figure 5).
As shown in fig. 4, the output power supply unit includes a second voltage stabilizing circuit, a load dynamic adjusting circuit and a flyback circuit. The pull-up signal KL30_PULLLUP is respectively connected with the load dynamic adjusting circuit and the flyback circuit through the second voltage stabilizing circuit, and the flyback circuit outputs power to the PTC driving power supply.
The second voltage stabilizing circuit comprises a second inductor L2003 and an eighteenth capacitor C2046. The kl30_pulllup is respectively connected with the fifth resistor R2017, the eleventh resistor R2025 and the eighteenth capacitor C2046 through the second inductor L2003, and the eighteenth capacitor C2046 is grounded.
The load dynamic adjusting circuit comprises a PWM chip U2003, a fifth resistor R2017, a sixth resistor R2018, a seventh resistor R2019, an eighth resistor R2020, a ninth resistor R2025, a tenth resistor R2021, an eleventh resistor R2026, a twelfth resistor R2027, a thirteenth resistor R2029, a fourteenth resistor R2030, an eighth capacitor C2038, a ninth capacitor C2070, a tenth capacitor C2039, an eleventh capacitor C2040, a twelfth capacitor C2042, a thirteenth capacitor C2044, a second MOS transistor Q2004 and a second diode D2007. The RUN end RUN of the PWM chip U2003 is connected to the second voltage stabilizing circuit through the fifth resistor R2017, and is grounded through the sixth resistor R2018. The threshold current terminal ITH of the PWM chip U2003 is grounded through the seventh resistor R2019 and the eighth capacitor C2038 in sequence. The feedback FB of the PWM chip U2003 is grounded via the eighth resistor R2020, and is connected to the cathode of the second diode D2007 via the tenth resistor R2021, and the anode of the second diode D2007 is connected to the flyback circuit. The frequency end FREQ of the PWM chip U2003 is grounded via the ninth resistor R2025. The MODE/SYNC terminal MODE/SYNC of the PWM chip U2003 is grounded via the tenth capacitor C2039. The input power terminal INTVCC of the PWM chip U2003 is also grounded via the tenth capacitor C2039. The sensing end SENSE of the PWM chip U2003 is connected to the twelfth capacitor C2042 and the twelfth resistor R2027, respectively. The voltage input terminal VIN is grounded through the eleventh capacitor C2040 and connected to the second voltage stabilizing circuit through the eleventh resistor R2026. The GATE terminal GATE of the PWM chip U2003 is connected to the GATE of the second MOS transistor Q2004, the source of the second MOS transistor Q2004 is sequentially connected to the fourteenth resistor R2030 and the thirteenth capacitor C2044 to be grounded, and the source of the second MOS transistor Q2004 is also connected to the flyback circuit. The drain electrode of the second MOS transistor Q2004 is connected to the twelfth resistor R2027 and the thirteenth resistor R2029, respectively. The twelfth capacitor C2042 and the thirteenth resistor R2029 are grounded, respectively.
The flyback circuit comprises a flyback transformer and a peripheral circuit U2001 thereof. The source electrode of the second MOS transistor Q2004 is connected with a flyback circuit. And a filtering circuit is also connected between the load dynamic adjusting circuit and the flyback circuit. A filter circuit is also provided between the flyback circuit outputs h_u1 and h_u2z. PWM chip U2003 output produces PWM signal, forms current loop and voltage loop through peripheral circuit, and the current loop is used for gathering switch second MOS pipe output load current and is regarded as feedback regulation input, twelfth resistance R2027 and with eighth resistance R2020, ninth resistance R2025 and seventh resistance R2019 etc. form voltage regulation loop for the load output satisfies outside flyback transformer dynamic regulation load output. The stabilized voltage absorbed by the second inductor L2003 passes through a U2001 loop and forms an input and a flyback circuit in the primary coil of the transformer, the second MOS tube Q2004 forms a flyback circuit and forms three paths of output, the output of the flyback circuit is rectified by the second diode D2007 and fed back to the PWM chip U2003 to serve as input of the input voltage loop system, and when the input changes, the output changes and the corresponding load feedback is output. The other output is rectified and filtered from the secondary output of the transformer to form H_U1, the H_U1 is output to the PTC driving power supply for supplying power, the last output is rectified and filtered to form H_U2, the H_U2 is processed after driving power supply and is divided into one path, the one path is formed into a buck circuit through an LDO, and a 5v VCC_ISOLATE isolation circuit is used for supplying power to driving logic and other paths and is isolated from other signals.
When the voltage of 9-16v is input into the small KL30 battery, the small KL30 battery is processed by the electric box and then output to form KL15, one path is reserved, the other path is processed by the related level circuit and then gives an enabling signal to the main switch circuit, at the moment, the MCU chip enables no input, when the VCU of the electric automobile controller sends an enabling signal, the voltage of the KL15 is effective, therefore, the PTC power supply system after the whole automobile is ignited is in a low power consumption mode, the output of loads and the like cannot be activated, and when the electric automobile controller sends the enabling signal to the main control unit after ready, the MCU sends the enabling signal to activate the main switch circuit, so that the KL30 switch and the KL30 PULLUP normally work. When the whole vehicle works, the ready signal is already activated, and if the KL15 signal is disconnected, the MCU sends an enabling maintenance signal to ensure that the switch control circuit works normally. When the electric automobile controller does not send out an enabling signal, the main control unit does not send out an enabling and activating function, and the main control unit manages the power supply to enter a sleep mode until the enabling signal is activated. In addition, when the electric automobile controller sends a can message to activate the main control unit, the PTC power management system is also activated.
When the input power of the small battery KL30 is abnormal, the input power may be higher or lower, the acquisition loop feeds back the signal to the MCU, and the MCU performs corresponding strategy processing according to specific load conditions and reports the signal to the can bus. When the load of the H_U1 is abnormal, the voltage fluctuation or abnormality of the H_U1 is caused, the power supply chip feeds back the current to the current loop through current collection to adjust the PWM duty ratio, so that the load of the transformer or the full-load characteristic output curve is ensured not to have a peak, and the output power supply voltage is stable and does not have fluctuation.
The invention realizes power supply output of different voltage classes through different power supply topological structures and circuits to meet the dynamic response requirement of a load and different working modes to switch through electronic switching power supply management, and simultaneously carries out a series of system processing to realize electronic control switching power supply management.
The power supply circuit is characterized in that the power supply circuit is divided into two paths through the input of external small batteries 9-16v, one path is used for supplying power to a 5v system, and the other path is used for supplying power to an H_U power supply input, isolating the 5v power supply input and a loop PWM driving and collecting current feedback through the processing of a flyback circuit. The other path is used as KL15 input and is collected through signal processing for power supply power-on and power-off mode management. The 5v power management is divided into digital and analog 5v for the main control circuit, can and signal processing circuit respectively. And the necessary signals such as output voltage and the like are fed back, collected and diagnosed, and the automatic regulation and response can be controlled dynamically in real time through an algorithm strategy, so that an automatic control management system is achieved.
It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are by way of example only and are not limiting. The objects of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been shown and described in the examples and embodiments of the invention may be modified or practiced without departing from the principles described.
Claims (9)
1. The PTC power management system for the electric automobile is characterized by comprising a system power input end, an input power unit, an up-down power mode unit, an output power unit and a main control unit; the input power supply unit comprises a voltage division acquisition circuit for providing input for the main control unit, a time sequence power supply circuit for supplying power to the power-on and power-off mode unit, and a main switch circuit respectively connected with the main control unit and the electric automobile controller; the system power supply input end is respectively connected with the voltage division acquisition circuit and the time sequence power supply circuit, the time sequence power supply circuit is connected with the main switch circuit, the main switch circuit also outputs two paths of signals, one path of mode input signals are input to the power-on and power-off mode unit, and the other path of pull signals are input to the output power supply unit; the power-on and power-off mode unit outputs power to the main control unit; the output power supply unit outputs power to the PTC driving power supply; the output power supply unit comprises a second voltage stabilizing circuit, a load dynamic adjusting circuit and a flyback circuit; the pull-up signal is respectively connected with the load dynamic adjusting circuit and the flyback circuit through the second voltage stabilizing circuit, and the flyback circuit outputs power to the PTC driving power supply; the second voltage stabilizing circuit comprises a second inductor and an eighteenth capacitor.
2. The PTC power management system according to claim 1, wherein the voltage dividing and collecting circuit comprises a first resistor, a second resistor, and a first capacitor; and the system power input end is respectively connected with the second resistor and the first capacitor through the first resistor and then grounded.
3. The PTC power management system according to claim 1, wherein the time-series power supply circuit comprises a second capacitor, a third capacitor, a first inductor, a fourth capacitor, and a fifth capacitor; the system power supply input end is connected with the first inductor after passing through the second capacitor and the third capacitor which are connected in parallel, and the first inductor is grounded after being connected with the fourth capacitor and the fifth capacitor which are connected in parallel.
4. The PTC power management system for an electric vehicle according to claim 1, wherein the input power supply unit further comprises a signal processing circuit composed of a fourteenth capacitor, a bidirectional regulator, and a first diode; the system power input end is grounded through the fourteenth capacitor and the bidirectional voltage stabilizing tube respectively, and the system power input end is connected with the time sequence power supply circuit through the first diode.
5. The PTC power management system according to claim 1, wherein the main switching circuit comprises a third resistor, a fourth resistor, a sixth capacitor, a first zener diode, and a first MOS transistor; the third resistor is connected in parallel between the fourth resistor and the sixth capacitor, and the common output end of the third resistor and the fourth resistor is respectively connected with the main control unit and the electric automobile controller; the drain electrode of the first MOS tube is connected with the cathode of the first Zener diode, the anode of the first Zener diode is connected with the fourth resistor, the grid electrode of the first MOS tube is connected with the anode of the first Zener diode, and the source electrode of the first MOS tube is used for respectively outputting a mode input signal and a pull-up signal.
6. The PTC power management system according to claim 5, wherein the source of the first MOS transistor is filtered by the filter circuit before the input signal in the output mode and the pull-up signal are outputted.
7. The PTC power management system according to claim 1, wherein the power-on/power-off mode unit comprises a first voltage stabilizing circuit, a first switching circuit, an interface power supply circuit, and a step-down power supply circuit; the main switching circuit outputs a mode input signal to the first voltage stabilizing circuit, the first switching circuit and the interface power supply circuit in sequence; the main switch circuit also outputs a mode input signal to the step-down power supply circuit; the time sequence power supply circuit outputs a time sequence power supply signal to the first switch circuit.
8. The PTC power management system according to claim 1, wherein the load dynamic adjustment circuit comprises a PWM chip, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor, a second MOS transistor, and a second diode; the running end of the PWM chip is connected with the second voltage stabilizing circuit through the fifth resistor and grounded through the sixth resistor; the threshold current end of the PWM chip is grounded through the seventh resistor and the eighth capacitor in sequence; the feedback end of the PWM chip is grounded through the eighth resistor respectively, the feedback end of the PWM chip is connected with the cathode of the second diode through the tenth resistor, and the anode of the second diode is connected with the flyback circuit; the frequency end of the PWM chip is grounded through the ninth resistor; the mode end/synchronous end of the PWM chip is grounded through the tenth capacitor; the input power end of the PWM chip is grounded through the tenth capacitor; the induction end of the PWM chip is respectively connected with the twelfth capacitor and the twelfth resistor; the voltage input end of the PWM chip is grounded through the eleventh capacitor and connected with the second voltage stabilizing circuit through the eleventh resistor; the gate end of the PWM chip is connected with the gate of the second MOS tube, the source electrode of the second MOS tube is sequentially connected with the fourteenth resistor and the thirteenth capacitor to be grounded, and the source electrode of the second MOS tube is also connected with the flyback circuit; the drain electrode of the second MOS tube is respectively connected with the twelfth resistor and the thirteenth resistor; the twelfth capacitor and the thirteenth resistor are grounded, respectively.
9. A PTC power management system according to claim 1, wherein the output power supply unit further comprises a filter circuit connected between the load dynamic adjustment circuit and the flyback circuit.
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| CN201710656852.XA CN107276407B (en) | 2017-08-03 | 2017-08-03 | PTC power management system for electric automobile |
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| CN108556632B (en) * | 2018-06-10 | 2023-08-25 | 重庆三三电器股份有限公司 | Intelligent TFT instrument screen brightness wake-up circuit and control method thereof |
| CN112564501A (en) * | 2020-12-16 | 2021-03-26 | 博耐尔汽车电气系统有限公司 | Switching power supply for PTC and control method thereof |
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| CN102809931A (en) * | 2011-05-30 | 2012-12-05 | 鸿富锦精密工业（深圳）有限公司 | Time sequence control circuit for power supply |
| CN104638885A (en) * | 2014-12-30 | 2015-05-20 | 上海英联电子系统有限公司 | Dynamic load fast response circuit |
| CN205800724U (en) * | 2016-06-29 | 2016-12-14 | 浙江合众新能源汽车有限公司 | A kind of PTC heat driven system used for electric vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB2421594A (en) * | 2004-12-21 | 2006-06-28 | Cambridge Semiconductor Ltd | Switch mode power supply digital control system |
| JP2012196985A (en) * | 2011-03-18 | 2012-10-18 | Mitsubishi Heavy Ind Ltd | Heater for heat medium and air conditioner for vehicle with the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102809931A (en) * | 2011-05-30 | 2012-12-05 | 鸿富锦精密工业（深圳）有限公司 | Time sequence control circuit for power supply |
| CN104638885A (en) * | 2014-12-30 | 2015-05-20 | 上海英联电子系统有限公司 | Dynamic load fast response circuit |
| CN205800724U (en) * | 2016-06-29 | 2016-12-14 | 浙江合众新能源汽车有限公司 | A kind of PTC heat driven system used for electric vehicle |
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