CN207368880U - Bi-directional DC-DC battery pack converting means in electric automobile - Google Patents
Bi-directional DC-DC battery pack converting means in electric automobile Download PDFInfo
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- CN207368880U CN207368880U CN201820102954.7U CN201820102954U CN207368880U CN 207368880 U CN207368880 U CN 207368880U CN 201820102954 U CN201820102954 U CN 201820102954U CN 207368880 U CN207368880 U CN 207368880U
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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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- 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
- Y02T10/72—Electric energy management in electromobility
Abstract
Two-way DC DC battery pack converting means in electric automobile, the utility model belong to the DC converter field of electric power system.The utility model for existing battery pack converting means transmission speed it is slow, be not easy to realize, precision is low, stability is poor, the deficiency of power consumption and poor-performing, there is provided it is a kind of it is simple easily realize, transmission speed is fast, precision is high, the two-way DC DC converting means of circuit stability, Low Power High Performance.Using main topological circuit as core, be subject to TL494, IR2110, STM32F103C8T6 chip and other auxiliary circuits realizes in the range of certain voltage to battery pack constant-current charge the utility model.The utility model is mainly used in the battery pack of electric automobile.
Description
Technical field
The utility model belongs to the DC converter field of electric power system.
Background technology
Common TLP350 is a to be used for carrying out IGBT raster data models in DC-DC battery packs converting means on the market now
The photoelectrical coupler encapsulated with the 8PIN DIP of POWER MOSFET raster data models.Its output peak point current IO=± 2.5A,
It is very suitable for the IGBT/MOSFET for driving 1200V.With high noise resisting ability, minimum common mode inhibition, output pulse width from
Limitation, the advantage such as switching speed is fast, small cost is low.Although light-coupled isolation is small and simple in structure, there are common mode
The shortcomings of rejection ability is poor, and transmission speed is relatively slow.Fastest only tens KHz of light-coupled isolation device, so can not carry
Rise the switching speed of MOSFET pipes.
Usually PWM is produced using microcontroller MOS (metal oxide are controlled by IR2110 in the prior art
Semiconductor) pipe is cut-off.Using the timer internal setting time benchmark of microcontroller, make timer overflow n times when
Between be PWM high level time.Initial value is assigned to timer according to the time reference of setting.Flag bit FLAG=1PWM is set as height
Level, when n is added to certain number, makes FLAG=0, PWM output low levels.This scheme can accurately control generation certain frequency
PWM, but software realize it is complex.
In summary, it is necessary to which a kind of simple easily realization, transmission speed is fast, precision is high, circuit stability, Low Power High Performance
Bi-directional DC-DC battery pack converting means.
Utility model content
For the above-mentioned prior art be difficult meet it is simple easily realize, transmission speed is fast, precision is high, circuit stability, low-power consumption
High performance problem, the utility model provide it is a kind of it is simple easily realize, transmission speed is fast, precision is high, circuit stability, low-power consumption
High performance bidirectional DC-DC converter device.
The technical solution of bi-directional DC-DC battery pack converting means in electric automobile involved by the utility model is as follows：
Bi-directional DC-DC battery pack converting means in electric automobile, it includes D.C. regulated power supply, battery pack, electric current inspection
Slowdown monitoring circuit, overcharge protection circuit, AND gate circuit, step motion control circuit and microprocessor, it further includes two-way buck-boost and turns
Converter circuit, PWM modulation circuit；The two-way buck-boost converter circuits include main topological circuit and drive circuit；
The D.C. regulated power supply connects the main topological circuit in two-way buck-boost converter circuits, drive circuit
Receiving the signal that AND gate circuit is given controls main topological circuit to be converted between buck topological circuits and boost topological circuits, with
The output terminal of the input terminal connection microprocessor of gate circuit, the input terminal of the output terminal connection PWM modulation circuit of AND gate circuit,
The output terminal of PWM modulation circuit connects two-way buck-boost converter circuits, the output terminal and current detecting of main topological circuit
The input terminal connection of circuit, the input terminal of the output terminal connection microcontroller of current detection circuit, the input of step motion control circuit
The output terminal of end connection microprocessor, the output terminal of step motion control circuit connect the input of two-way buck-boost converter circuits
End, battery pack are bi-directionally connected with two-way buck-boost converter circuits, the output terminal connection load of battery pack, two-way buck-
The output terminal connection load of boost converter circuits, the input terminal of overcharge protection circuit connect two-way buck-boost converters
The output terminal of circuit, the output terminal connection battery pack of overcharge protection circuit.
The main topological circuit includes 2 terminals Ps 1, P2,5 resistance R3, R4, R5, R6, R7,3 capacitance C2, C3,
C4,2 metal-oxide-semiconductor Q1, Q2,1 inductance L1 and 2 diodes D1, D4；No. 3 of one end connection terminal P2 of the resistance R5
Port, one end of the other end connection resistance R6 of resistance R5, No. 1 port of the other end connection terminal P2 of resistance R6, resistance R7
One end connection terminal P2 No. 1 port, the other end ground connection, No. 3 ports of one end connection terminal P2 of capacitance C3, another termination
Ground, No. 3 ports of one end connection terminal P2 of inductance L1, the drain electrode of the other end connection metal-oxide-semiconductor Q2 of inductance L1, metal-oxide-semiconductor Q2's
Source electrode is connected between capacitance C3 and resistance R7, the drain electrode of the source electrode connection metal-oxide-semiconductor Q2 of metal-oxide-semiconductor Q1, the drain electrode connection of metal-oxide-semiconductor Q1
No. 1 port of terminals P 1, No. 1 port of the cathode connecting terminal P1 of diode D1, the anode connection diode D4 of diode D1
Cathode, the plus earth of diode D4, the drain electrode of the cathode of diode D4 also with metal-oxide-semiconductor Q2 is connected, and one end of capacitance C2 connects
No. 1 port of connecting terminal P1, other end ground connection, No. 1 port of one end connection terminal P1 of resistance R3, the other end of resistance R3 connect
One end of connecting resistance R4, the other end ground connection of resistance R4, capacitance C4 are connected in parallel on the both ends of resistance R4, and No. 3 ports of terminals P 1 connect
Ground.
The drive circuit includes 1 IR2110S chip, 2 resistance R1, R8,3 diode D2, D3, D5,3
12V voltage sources；The pin VDD and pin VCC of the IR2110S chips connect two 12V voltage sources respectively, pin SD,
VSS, COM are grounded respectively, and the anode connection 12V voltage sources of diode D2, the cathode connection chip I R2110S's of diode D2 draws
One end of foot VB, capacitance C1 connect pin VB, the other end connects pin VS, diode D4 in the main topological circuit of pin VC connections
Cathode, one end connection pin VS of resistance R1, other end ground connection, the cathode connection pin HO of diode D3, the sun of diode D3
Pole connects the grid of metal-oxide-semiconductor Q1 in main topological circuit, and resistance R2 is connected in parallel on the both ends of diode D3, the cathode connection of diode D5
The anode of pin LO, diode D5 connect the grid of metal-oxide-semiconductor Q2 in main topological circuit, and resistance R8 is connected in parallel on the two of diode D5
End.
The PWM modulation circuit includes 1 TL494 chip, 9 resistance R9, R10, R11, R12, R13, R14, R15,
R16, R17, it is the pin RT of one end connection chip TL494 of 5 capacitance C5, C6, C7, C12, C13, the resistance R9, another
End ground connection, the pin CT of one end connection chip TL494 of capacitance C6, other end ground connection, pin DTC ground connection, one end of resistance R10
Pin IN1-, one end of the other end connection capacitance C12 of resistance R10 are connected, the other end of capacitance C12 connects the one of capacitance C13
End, one end of the other end connection resistance R15 of capacitance C13, the other end connection pin IN2- of resistance R15, one end of resistance R11
Pin IN1- is connected, one end of the other end connection resistance R13 of resistance R11, the other end connection pin IN2- of resistance R13, draws
Foot CMPEN is connected between capacitance C12 and capacitance C13, while pin CMPEN is connected between resistance R11 and resistance R13, electricity
Hinder one end connection pin IN2+, pin GND ground connection of R12, pin E2, the other end of one end connection chip TL494 of resistance R17
Ground connection, pin E1 are connected with pin E2, and the pin E2 of one end connection chip TL494 of resistance R14, the other end of resistance R14 connects
One end of connecting resistance R16, the other end ground connection of resistance R16, the pin VCC of chip TL494, pin C1, pin C2 and connect into
12V voltage sources, one end connection pin VCC of capacitance C5, other end ground connection.
The AND gate circuit includes 3 logic units U5A, U5B, U5C, and the pin 13 of the logic unit U5A connects
Between connecting resistance R16 and resistance R14, the pin 11 of logic unit U5C connects the pin 13 of logic unit U5A, logic unit U5A
Pin 12 connect the pin LIN of drive circuit chips IR2110, the pin 8 of logic unit U5C connects drive circuit SMIC
The pin HIN of piece IR2110.
Bi-directional DC-DC battery pack converting means in the electric automobile further includes key control module and display mould
Block；Key control module and display module are connected with microcontroller respectively.The microcontroller is STM32F103C88T6.
The utility model beneficial effect：
Bi-directional DC-DC battery pack converting means in electric automobile involved by the utility model, using main topological circuit as
Core, be subject to drive circuit, PWM modulation circuit, microcontroller and other auxiliary circuits realize it is right in the range of certain voltage
Battery pack constant-current charge.The utility model has simple easily realization, transmission speed is fast, precision is high, circuit stability, the high property of low-power consumption
The advantages of energy.
When battery pack charges, the PWM ripples of output, the opening and closing of metal-oxide-semiconductor is controlled by IR2110 drive circuits, makes main topology knot
Structure is changed to buck buck configurations.Output current is converted into voltage signal through resistance and is acquired, then fed back difference progress PWM defeated
The adjustment gone out, realizes constant-current charge, the function of overshoot protection.Equally, during battery power discharge, main topological structure is boost liters
Laminated structure, finally realizes that voltage stabilizing exports.Continuous adjust automatically through oversampling circuit, enables power supply to work alternatively and is being charged and discharged shape
State, achievees the purpose that input voltage is constant.
Brief description of the drawings
Fig. 1 is the system block diagram of bi-directional DC-DC battery pack converting means；
Fig. 2 is main topological circuit figure；
Fig. 3 is drive circuit figure；
Fig. 4 is PWM modulation circuit diagram；
Fig. 5 is AND gate circuit figure；
Fig. 6 is the voltage follower circuit figure of TL494 amplifier output terminals；
Fig. 7 is the current amplifier circuit figure of output current under buck states；
Fig. 8 is the voltage follower circuit figure that output voltage samples under boost states；
Fig. 9 is the schematic diagram of two-way single-pole double-throw switch (SPDT) RS；
Figure 10 is the schematic diagram of two-way single-pole double-throw switch (SPDT) RL；
Figure 11 is the schematic diagram of two-way single-pole double-throw switch (SPDT) RL；
Figure 12 is the schematic diagram of binding post P3；
Figure 13 is the schematic diagram of binding post P4；
Figure 14 is the schematic diagram of binding post P5；
Figure 15 is the circuit diagram of power control board U2；
Figure 16 is microprocessor circuit connection figure；
Figure 17 is display module circuit connection diagram；
Figure 18 is the circuit diagram of coding volume U7；
Figure 19 is the circuit diagram of coding volume U8；
Figure 20 is the circuit diagram of D/A converter U5；
Figure 21 is the circuit diagram of D/A converter U6；
Figure 22 is the circuit diagram of a/d converter U4.
Embodiment
The technical solution of the utility model is described further with reference to embodiment, but is not limited thereto, it is all
Be to technical solutions of the utility model technical scheme is modified or replaced equivalently, without departing from technical solutions of the utility model spirit and
Scope, should all cover in the scope of protection of the utility model.
Embodiment 1
In the present embodiment, the bi-directional DC-DC battery pack converting means in electric automobile, it include D.C. regulated power supply,
Battery pack, current detection circuit, overcharge protection circuit, AND gate circuit, step motion control circuit and microprocessor, it further includes two-way
Buck-boost converter circuits, PWM modulation circuit；The two-way buck-boost converter circuits include main topological circuit
And drive circuit；
The D.C. regulated power supply connects the main topological circuit in two-way buck-boost converter circuits, drive circuit
Receiving the signal that AND gate circuit is given controls main topological circuit to be converted between buck topological circuits and boost topological circuits, with
The output terminal of the input terminal connection microprocessor of gate circuit, the input terminal of the output terminal connection PWM modulation circuit of AND gate circuit,
The output terminal of PWM modulation circuit connects two-way buck-boost converter circuits, the output terminal and current detecting of main topological circuit
The input terminal connection of circuit, the input terminal of the output terminal connection microcontroller of current detection circuit, the input of step motion control circuit
The output terminal of end connection microprocessor, the output terminal of step motion control circuit connect the input of two-way buck-boost converter circuits
End, battery pack are bi-directionally connected with two-way buck-boost converter circuits, the output terminal connection load of battery pack, two-way buck-
The output terminal connection load of boost converter circuits, the input terminal of overcharge protection circuit connect two-way buck-boost converters
The output terminal of circuit, the output terminal connection battery pack of overcharge protection circuit.The D.C. regulated power supply is carried by power control board
For.
Illustrate the present embodiment with reference to Fig. 1, Fig. 2, the bi-directional DC-DC battery pack in the electric automobile involved by the utility model
Converting means, the main topological circuit include 2 terminals Ps 1, P2,5 resistance R3, R4, R5, R6, R7,3 capacitance C2, C3,
C4,2 metal-oxide-semiconductor Q1, Q2,1 inductance L1 and 2 diodes D1, D4；No. 3 of one end connection terminal P2 of the resistance R5
Port, one end of the other end connection resistance R6 of resistance R5, No. 1 port of the other end connection terminal P2 of resistance R6, resistance R7
One end connection terminal P2 No. 1 port, the other end ground connection, No. 3 ports of one end connection terminal P2 of capacitance C3, another termination
Ground, No. 3 ports of one end connection terminal P2 of inductance L1, the drain electrode of the other end connection metal-oxide-semiconductor Q2 of inductance L1, metal-oxide-semiconductor Q2's
Source electrode is connected between capacitance C3 and resistance R7, the drain electrode of the source electrode connection metal-oxide-semiconductor Q2 of metal-oxide-semiconductor Q1, the drain electrode connection of metal-oxide-semiconductor Q1
No. 1 port of terminals P 1, No. 1 port of the cathode connecting terminal P1 of diode D1, the anode connection diode D4 of diode D1
Cathode, the plus earth of diode D4, the drain electrode of the cathode of diode D4 also with metal-oxide-semiconductor Q2 is connected, and one end of capacitance C2 connects
No. 1 port of connecting terminal P1, other end ground connection, No. 1 port of one end connection terminal P1 of resistance R3, the other end of resistance R3 connect
One end of connecting resistance R4, the other end ground connection of resistance R4, capacitance C4 are connected in parallel on the both ends of resistance R4, and No. 3 ports of terminals P 1 connect
Ground.
Main topology work in one cycle can be divided into two stages, when P1 ends are open-minded, and P2 ends close, circuit structure
For buck buck topologies；When P2 ends are open-minded, and P1 ends close, circuit structure is boost Boost topologies.Q1, Q2 during original state
It is turned off, does not have energy storage on inductance capacitance.
(1) first stage：Give metal-oxide-semiconductor grid one high level drive signal so that Q1 is turned on.Energy on inductance is opened
Begin from zero increase, in energy storage state, topological structure is buck configuration.
(2) second stage：Q2 is open-minded, electrolytic capacitor electric discharge, and the electric current on inductance flows counterflow through Q2, and inductance both ends energy is opened
Begin to reduce, topological structure is boost configuration.
Illustrate the present embodiment with reference to Fig. 3, Fig. 4, the bi-directional DC-DC battery pack in the electric automobile involved by the utility model
Converting means, the drive circuit include 1 IR2110S chip, 2 resistance R1, R8,3 diode D2, D3, D5,3
12V voltage sources；The pin VDD and pin VCC of the IR2110S chips connect two 12V voltage sources respectively, pin SD,
VSS, COM are grounded respectively, and the anode connection 12V voltage sources of diode D2, the cathode connection chip I R2110S's of diode D2 draws
One end of foot VB, capacitance C1 connect pin VB, the other end connects pin VS, diode D4 in the main topological circuit of pin VC connections
Cathode, one end connection pin VS of resistance R1, other end ground connection, the cathode connection pin HO of diode D3, the sun of diode D3
Pole connects the grid of metal-oxide-semiconductor Q1 in main topological circuit, and resistance R2 is connected in parallel on the both ends of diode D3, the cathode connection of diode D5
The anode of pin LO, diode D5 connect the grid of metal-oxide-semiconductor Q2 in main topological circuit, and resistance R8 is connected in parallel on the two of diode D5
End.
Because metal-oxide-semiconductor is there are IR2110 the problem of the driving of flash floating, is selected as MOS driving elements, using certainly
Act circuit can complete the driving to flash metal-oxide-semiconductor.IR2110 has independent low side and high-end input channel, its suspended power supply
Using boostrap circuit, high-end operating voltage is up to 500V, the quiescent dissipation only 116mW under 15V.
The PWM modulation circuit includes 1 TL494 chip, 9 resistance R9, R10, R11, R12, R13, R14, R15,
R16, R17, it is the pin RT of one end connection chip TL494 of 5 capacitance C5, C6, C7, C12, C13, the resistance R9, another
End ground connection, the pin CT of one end connection chip TL494 of capacitance C6, other end ground connection, pin DTC ground connection, one end of resistance R10
Pin IN1-, one end of the other end connection capacitance C12 of resistance R10 are connected, the other end of capacitance C12 connects the one of capacitance C13
End, one end of the other end connection resistance R15 of capacitance C13, the other end connection pin IN2- of resistance R15, one end of resistance R11
Pin IN1- is connected, one end of the other end connection resistance R13 of resistance R11, the other end connection pin IN2- of resistance R13, draws
Foot CMPEN is connected between capacitance C12 and capacitance C13, while pin CMPEN is connected between resistance R11 and resistance R13, electricity
Hinder one end connection pin IN2+, pin GND ground connection of R12, pin E2, the other end of one end connection chip TL494 of resistance R17
Ground connection, pin E1 are connected with pin E2, and the pin E2 of one end connection chip TL494 of resistance R14, the other end of resistance R14 connects
One end of connecting resistance R16, the other end ground connection of resistance R16, the pin VCC of chip TL494, pin C1, pin C2 and connect into
12V voltage sources, one end connection pin VCC of capacitance C5, other end ground connection.
TL494 is the PDM keyer that a kind of frequency can arbitrarily be set.It contains frequency of oscillation by outer connecting resistance
The saw-toothed oscillator that original paper Rt, capacity cell Ct are determined, exports the width modulated of pulse by the positive sawtooth at capacitance Ct both ends
What ripple and control signal obtained more afterwards, with the increase of control signal amplitude, exporting the width of pulse will reduce.Produced by RC
The signal of appropriate frequency first passes through drive circuit amplification and shaping, then acts directly on the high power device MOS of main power circuit
Guan Shang, so as to control the size of output current.Reference signal access feedback input end is produced through D/A by microcontroller, can be led to
The duty cycle of each pulse is overregulated to stablize output and carry out various protections.
Illustrate the present embodiment with reference to Fig. 5, the bi-directional DC-DC battery pack conversion in the electric automobile involved by the utility model
Device, the AND gate circuit include 3 logic units U5A, U5B, U5C, and the pin 13 of the logic unit U5A connects electricity
Between hindering R16 and resistance R14, the pin 11 of logic unit U5C connects the pin 13 of logic unit U5A, and logic unit U5A's draws
Foot 12 connects the pin LIN of drive circuit chips IR2110, and the pin 8 of logic unit U5C connects drive circuit chips
The pin HIN of IR2110.
The pwm signal that logic circuit exports TL494 is converted into voltage signal by sampling resistor, then microcontroller is defeated
The high/low level gone out is with the signal phase with exporting signal and being used for IR2110 driving metal-oxide-semiconductors.By microcontroller to high/low level
Control can selectivity extract different pwm signal driving metal-oxide-semiconductors, and then select the operating mode of main topological circuit.
Illustrate the present embodiment with reference to Fig. 6, the bi-directional DC-DC battery pack conversion in the electric automobile involved by the utility model
Device, sample circuit are mainly that the voltage acquisition of R7 in main topological circuit is come out to the positive input terminal for being sent into operational amplifier, warp
Cross scale operation amplifying circuit to amplify the signal, then sampled signal is sent into microcontroller fortune by the conversion of A/D converter
Calculation is handled, the COM ends of the voltage follower circuit connection power control board of TL494 amplifier output terminals.
Illustrate the present embodiment with reference to Fig. 7, Figure 15, the bi-directional DC-DC battery in the electric automobile involved by the utility model
Group converting means, the VIfb ends of the current amplifier access power control board of output current under buck states.
Illustrate the present embodiment with reference to Fig. 8, Figure 15, the bi-directional DC-DC battery in the electric automobile involved by the utility model
Group converting means, the Vofb ends for the voltage follower access power control board that output voltage samples under boost states and main topology
The VO ends of circuit.
Illustrate the present embodiment with reference to Fig. 9, Figure 10, Figure 11, the bi-directional DC-DC in electric automobile involved by the utility model
Battery pack converting means, the switch use 3 two-way single-pole double-throw switch (SPDT)s, disconnect S1, connect S2, device is set as putting
Power mode, keeps U2=30 ± 0.5V, at this time transducer effciency η 1 >=95%.S1 is connected, disconnects S2, adjusts D.C. regulated power supply
Output voltage, when the US is changed in the range of 32-38V, bi-directional DC-DC circuit automatic conversion operating mode and can keep U2=
30±0.5V.The power control board provides voltage source for main topological circuit, and 12V voltage sources are provided for circuit.
Illustrate the present embodiment with reference to Figure 12, Figure 13, Figure 14, the two-way DC- in the electric automobile involved by the utility model
DC battery pack converting means, binding post P3, P4, P5 connect blade RL, RS, US of 3 switches respectively.
Illustrate the present embodiment with reference to Figure 16, the bi-directional DC-DC battery pack in the electric automobile involved by the utility model becomes
Changing device, the microprocessor circuit include microcontroller, key control module and display module；Microcontroller connects at the same time
Display module, PWM modulation circuit, key control module are connected with microcontroller, the input terminal of display module and microcontroller
Output terminal connects, the PA pins connection binding post P1 of the microprocessor STM32F103C8T6；VDD pins connect 3.3V,
VSS pins are grounded.The utility model uses STM32F103C8T6 types microprocessor as system control core, by Keyboard Control,
Using pattern and data display screen of the liquid crystal display as system, sample circuit is input in microcontroller through A/D conversions, is led to
After crossing the series of algorithms processing of processor, changed by D/A, voltage reference is input in constant-current circuit and detects tested power supply
Equipment.A/D and D/A modules are powered using 3.3V.
Illustrate the present embodiment with reference to Figure 17, the bi-directional DC-DC battery pack in the electric automobile involved by the utility model becomes
Changing device, display module realize the light on and off of lamp by light emitting diode and by key control.
Illustrate the present embodiment with reference to Figure 18, Figure 19, the bi-directional DC-DC battery in the electric automobile involved by the utility model
Group converting means, user set preset value by matrix keyboard and are sent into microcontroller processing, the root when needing to change reference voltage
The pulse sent according to encoder inspires corresponding external interrupt, and the reference voltage of setting is changed in interruption.
Illustrate the present embodiment with reference to Figure 20, Figure 21, the bi-directional DC-DC battery in the electric automobile involved by the utility model
Group converting means, by the change of knob or digital encoder, stm32 is detected and is changed the value of DA chips output, realizes step
Into.The conversion between digital quantity and analog quantity is carried out using DAC8830 chips.DAC8830 is a 16, single channel, serial
Input, super low-power consumption, the digital analog converter of voltage output type.The chip periphery circuit is simple, provides it the power supply pair of 3.3V
The chip power supply, clock signal input is provided to the SCLK ends of the chip by master controller, and CS is chip selection signal input terminal, low electricity
It is flat enabled.It exports VOUT and send the amplifier input terminal to constant-current source as reference voltage using signal is exported.Microcontroller is on the one hand
Numerical value is shown by liquid crystal display, digital quantity is on the other hand changed into by corresponding analog quantity by D/A modular converters
Output, inputs a signal into TL494 as signal is referred to, the output valve for so allowing for buck circuits is constant and adjustable.
Illustrate the present embodiment with reference to Figure 22, the bi-directional DC-DC battery pack in the electric automobile involved by the utility model becomes
Changing device, ADS1232 is a 24 highly integrated analog-digital converters, when reference voltage is+5V, it is allowed to which full scale is differential defeated
Enter scope from 2.5V to 19.5mV, further comprises a low drifting on piece oscillator and external crystal oscillator.ADS1232 is not controlled
Register, parameter are directly controlled by pin, wherein SPEED control data rates, and GAIN0 and GAIN1 control gains, A0 are carried out
Channel selecting, PDWN is used to reset and conversion and control.At the same time microcontroller by 24 A/D to the R7 voltages that amplify through scale operation
Signal is sampled, and sampled numerical value is sent into liquid crystal display by the signal with digital shape after being handled inside microcontroller
Formula is shown.
Claims (7)
1. the bi-directional DC-DC battery pack converting means in electric automobile, it includes D.C. regulated power supply, battery pack, current detecting
Circuit, overcharge protection circuit, AND gate circuit, step motion control circuit and microprocessor, it is characterised in that it further includes two-way
Buck-boost converter circuits, PWM modulation circuit；The two-way buck-boost converter circuits include main topological circuit
And drive circuit；
The D.C. regulated power supply connects the main topological circuit in two-way buck-boost converter circuits, and drive circuit receives
The signal that AND gate circuit is given controls main topological circuit to be converted between buck topological circuits and boost topological circuits, with door electricity
The output terminal of the input terminal connection microprocessor on road, the input terminal of the output terminal connection PWM modulation circuit of AND gate circuit, PWM tune
The output terminal of circuit processed connects two-way buck-boost converter circuits, the output terminal of main topological circuit and current detection circuit
Input terminal connects, the input terminal of the output terminal connection microcontroller of current detection circuit, the input terminal connection of step motion control circuit
The output terminal of microprocessor, the output terminal of step motion control circuit connect the input terminal of two-way buck-boost converter circuits, electricity
Pond group is bi-directionally connected with two-way buck-boost converter circuits, the output terminal connection load of battery pack, two-way buck-boost
The output terminal connection load of converter circuit, the input terminal of overcharge protection circuit connect two-way buck-boost converter circuits
Output terminal, the output terminal connection battery pack of overcharge protection circuit.
2. the bi-directional DC-DC battery pack converting means in electric automobile according to claim 1, it is characterised in that described
Main topological circuit includes 2 terminals Ps 1, P2,5 resistance R3, R4, R5, R6, R7,3 capacitance C2, C3, C4,2 metal-oxide-semiconductor Q1,
Q2,1 inductance L1 and 2 diodes D1, D4；No. 3 ports of one end connection terminal P2 of the resistance R5, resistance R5's is another
One end of one end connection resistance R6, No. 1 port of the other end connection terminal P2 of resistance R6, one end connection terminal P2 of resistance R7
No. 1 port, other end ground connection, No. 3 ports of one end connection terminal P2 of capacitance C3, other end ground connection, one end of inductance L1
No. 3 ports of connection terminal P2, the drain electrode of the other end connection metal-oxide-semiconductor Q2 of inductance L1, the source electrode of metal-oxide-semiconductor Q2 are connected to capacitance C3
Between resistance R7, the drain electrode of the source electrode connection metal-oxide-semiconductor Q2 of metal-oxide-semiconductor Q1, No. 1 port of the drain electrode connection terminal P1 of metal-oxide-semiconductor Q1,
No. 1 port of the cathode connecting terminal P1 of diode D1, the cathode of the anode connection diode D4 of diode D1, diode D4's
Plus earth, the drain electrode of the cathode of diode D4 also with metal-oxide-semiconductor Q2 are connected, No. 1 port of one end connection terminal P1 of capacitance C2,
The other end is grounded, No. 1 port of one end connection terminal P1 of resistance R3, one end of the other end connection resistance R4 of resistance R3, electricity
The other end ground connection of R4 is hindered, capacitance C4 is connected in parallel on the both ends of resistance R4, No. 3 ports ground connection of terminals P 1.
3. the bi-directional DC-DC battery pack converting means in electric automobile according to claim 2, it is characterised in that described
Drive circuit includes 1 IR2110S chip, 2 resistance R1, R8,3 diodes D2, D3, D5,3 12V voltage sources；Described
The pin VDD and pin VCC of IR2110S chips connect two 12V voltage sources respectively, and pin SD, VSS, COM are grounded respectively, and two
The anode connection 12V voltage sources of pole pipe D2, the pin VB of the cathode connection chip I R2110S of diode D2, one end of capacitance C1
Connect pin VB, the other end connects pin VS, the cathode of diode D4, one end of resistance R1 in the main topological circuit of pin VC connections
Pin VS, other end ground connection are connected, the anode of cathode connection the pin HO, diode D3 of diode D3 are connected in main topological circuit
The grid of metal-oxide-semiconductor Q1, resistance R2 are connected in parallel on the both ends of diode D3, and the cathode of diode D5 connects pin LO, diode D5's
Anode connects the grid of metal-oxide-semiconductor Q2 in main topological circuit, and resistance R8 is connected in parallel on the both ends of diode D5.
4. the bi-directional DC-DC battery pack converting means in electric automobile according to claim 3, it is characterised in that described
PWM modulation circuit include 1 TL494 chip, 9 resistance R9, R10, R11, R12, R13, R14, R15, R16, R17,5 electricity
Hold C5, C6, C7, C12, C13, the pin RT of one end connection chip TL494 of the resistance R9, other end ground connection, capacitance C6
The pin CT of one end connection chip TL494, other end ground connection, pin DTC ground connection, one end connection pin IN1- of resistance R10,
One end of the other end connection capacitance C12 of resistance R10, one end of the other end connection capacitance C13 of capacitance C12, capacitance C13's is another
One end of one end connection resistance R15, one end connection pin IN1- of the other end connection pin IN2-, resistance R11 of resistance R15,
One end of the other end connection resistance R13 of resistance R11, the other end of resistance R13 connect pin IN2-, and pin CMPEN is connected to
Between capacitance C12 and capacitance C13, while pin CMPEN is connected between resistance R11 and resistance R13, and one end of resistance R12 connects
Meet pin IN2+, pin GND ground connection, the pin E2 of one end connection chip TL494 of resistance R17, other end ground connection, pin E1 and
Pin E2 connections, the one of the other end connection resistance R16 of the pin E2 of one end connection chip TL494 of resistance R14, resistance R14
End, the other end ground connection of resistance R16, the pin VCC of chip TL494, pin C1, pin C2 are simultaneously connected into 12V voltage sources, capacitance
One end connection pin VCC of C5, other end ground connection.
5. the bi-directional DC-DC battery pack converting means in electric automobile according to claim 4, it is characterised in that described
AND gate circuit include 3 logic unit U5A, U5B, U5C, the pin 13 of the logic unit U5A connects resistance R16 and electricity
Between hindering R14, the pin 11 of logic unit U5C connects the pin 13 of logic unit U5A, and the pin 12 of logic unit U5A connects
The pin 8 of the pin LIN of drive circuit chips IR2110, logic unit U5C connect drawing for drive circuit chips IR2110
Foot HIN.
6. the bi-directional DC-DC battery pack converting means in electric automobile according to claim 1, it is characterised in that described
Electric automobile in bi-directional DC-DC battery pack converting means further include key control module and display module；By key control mould
Block and display module are connected with microcontroller respectively.
7. the bi-directional DC-DC battery pack converting means in electric automobile according to claim 1, it is characterised in that described
Microcontroller be STM32F103C88T6.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820102954.7U CN207368880U (en) | 2018-01-22 | 2018-01-22 | Bi-directional DC-DC battery pack converting means in electric automobile |
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| CN201820102954.7U CN207368880U (en) | 2018-01-22 | 2018-01-22 | Bi-directional DC-DC battery pack converting means in electric automobile |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110707992A (en) * | 2019-11-04 | 2020-01-17 | 湘潭大学 | Photovoltaic power generation interface system and control method thereof |
| CN116247781A (en) * | 2023-05-09 | 2023-06-09 | 合肥安轩能源有限公司 | Low-power consumption power supply circuit of high-voltage lithium battery BMS |
-
2018
- 2018-01-22 CN CN201820102954.7U patent/CN207368880U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110707992A (en) * | 2019-11-04 | 2020-01-17 | 湘潭大学 | Photovoltaic power generation interface system and control method thereof |
| CN116247781A (en) * | 2023-05-09 | 2023-06-09 | 合肥安轩能源有限公司 | Low-power consumption power supply circuit of high-voltage lithium battery BMS |
| CN116247781B (en) * | 2023-05-09 | 2023-07-11 | 合肥安轩能源有限公司 | Low-power consumption power supply circuit of high-voltage lithium battery BMS |
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