CN107171389A - Battery charge control circuit - Google Patents
Battery charge control circuit Download PDFInfo
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- CN107171389A CN107171389A CN201710425989.4A CN201710425989A CN107171389A CN 107171389 A CN107171389 A CN 107171389A CN 201710425989 A CN201710425989 A CN 201710425989A CN 107171389 A CN107171389 A CN 107171389A
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- 210000003462 vein Anatomy 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
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Abstract
The invention discloses a kind of battery charge control circuit, including protection module, switch element, current detecting unit, pulse signal generation module, current control module, voltage control module, constant pressure module and main computer unit；The protection module and total input, the switch element, total output end and the pulse signal generation module are connected, the switch element is connected with the current detecting unit and the pulse signal generation module, the current detecting unit is connected with total output end and the current control module, the pulse signal generation module is connected with the current control module and the voltage control module, the current control module is connected with the constant pressure module and the main computer unit, the voltage control module and the constant pressure module, the main computer unit and total output end are connected.
Description
【Technical field】
The present invention relates to charging circuit technical field, more particularly to a kind of battery charge control circuit.
【Background technology】
The production of battery by a series of discharge and recharge steps such as chemical conversions and partial volume using needs with that could form resultant battery.
The chemical conversion of battery refers to the battery progress primary charging to new production, and the meaning that " chemical conversion " " is transformed " utilizes chemistry and electricity
Chemically react the process for making pole plate change into the positive and negative pole plate with electrochemical properties.This process is influence battery life
Important step, therefore, requires very strict to the charging control circuit of battery.Battery formation is generally divided into constant-current charge and constant pressure
Charge two benches, i.e., first battery terminal voltage is reached final discharging voltage with low current trickle charge, then constant-current charge is to battery
Terminal voltage reaches constant-voltage charge voltage, and then constant-voltage charge is untill fully charged.Existing battery charge control circuit is at the beginning
Just directly battery is charged by peak power, it is impossible to autonomous manipulation, is easily damaged battery.
In consideration of it, real be necessary to provide a kind of battery charge control circuit to solve drawbacks described above.
【The content of the invention】
It is an object of the invention to provide a kind of controllable battery charging voltage and the battery charge control circuit of charging current.
To achieve these goals, the present invention provides a kind of battery charge control circuit, including protection module, switch list
Member, current detecting unit, pulse signal generation module, current control module, voltage control module, constant pressure module and main frame list
Member；The protection module is connected with total input, the switch element, total output end and the pulse signal generation module, institute
Switch element is stated with the current detecting unit and the pulse signal generation module to be connected, the current detecting unit with it is total defeated
Go out end and the current control module is connected, the pulse signal generation module and the current control module and the voltage control
Molding block is connected, and the current control module is connected with the constant pressure module and the main computer unit, the voltage control module
It is connected with the constant pressure module, the main computer unit and total output end；The protection module is used to that the protection module will to be flowed through
Electric current change into voltage and transmit to the pulse signal generation module, flow through the electric current of the protection module i.e. described total defeated
Go out the output current at end, the output voltage of total output end feedback is also transmitted to the pulse signal and produced by the protection module
Raw module, presets when the voltage or the output voltage of total output end feedback that the output current of total output end is converted are more than
During voltage, the pulse signal generation module stops output pulse signal；The current detecting unit is used to detect described total defeated
Go out the output current at end and the output current detected changed into voltage to transmit to the current control module；The pulse letter
Number generation module is used to produce pulse signal；The constant pressure module is used to provide constant voltage and to the current control module
And the voltage control module is powered；The main computer unit is used to transmit control signal to the current control module or described
Voltage control module；The control signal that the current control module is used to transmit the main computer unit changes into voltage, and root
The voltage output that the control signal that the voltage transmitted according to the current detecting unit is transmitted with the main computer unit is changed into is controlled
Voltage is to the pulse signal generation module；The control signal that the voltage control module is used to transmit the main computer unit turns
Formation voltage, and the output voltage fed back according to the total output end the control signal transmitted with the main computer unit changes into
Voltage output control voltage is to the pulse signal generation module；The pulse signal generation module is according to the current control mould
The control voltage of block transmission and the control voltage of voltage control module transmission produce the pulse signal of corresponding dutycycle, and will
The pulse signal transmission of generation controls the frequency of the conducting and cut-off of the switch element, so as to control to the switch element
The output current of the output voltage of total output end and total output end.
In a preferred embodiment, the protection module includes current transformer, the first to the 7th resistance, the one or two
Pole pipe, the first electric capacity, the first power supply, the first photo-coupler, the first voltage-stablizer and the second electric capacity；The current transformer includes the
One coil and the second coil；The first end of the first coil is connected with total input, the second end of the first coil
It is connected with the switch element；The first end of second coil is connected with the first end of the first resistor, second line
Second end of circle is connected with the second end of the first resistor；The first end of the first resistor and the sun of first diode
Extremely it is connected, the second end ground connection of the first resistor；The negative electrode of first diode and the first end of the second resistance and
The first end of first electric capacity is connected, the second end ground connection of the second end of the second resistance and first electric capacity；It is described
The first end of second resistance is also connected with the pulse signal generation module, the first end output voltage of the second resistance to institute
State pulse signal generation module；First photo-coupler includes light-emitting component and photo detector；The first of the light-emitting component
End is connected by the 3rd resistor with total output end, the second end of the light-emitting component and the first of the 4th resistance
The first end of end and first voltage-stablizer is connected, the second end of the 4th resistance and the first end phase of the 5th resistance
Even, the first end of the second end of the 5th resistance and the 6th resistance, the second end of first voltage-stablizer and described the
The first end of two electric capacity is connected；The second end, the 3rd end of first voltage-stablizer and second electric capacity of 6th resistance
The second end ground connection；The first end of the photo detector is connected by the 7th resistance with first power supply, the light
Second end of element is connected with the pulse signal generation module, the second end output voltage of the photo detector to the pulse
Signal generator module.
In a preferred embodiment, the switch element include electronic switch, the first end of the electronic switch with
Second end of the first coil is connected, and the second end of the electronic switch is connected with the current detecting unit, the electronics
3rd end of switch is connected with the pulse signal generation module.
In a preferred embodiment, the electronic switch is N-type metal-oxide-semiconductor, the first end of the electronic switch, second
End and the 3rd end correspond to drain electrode, source electrode and the grid of metal-oxide-semiconductor respectively.
In a preferred embodiment, the current detecting unit include current detecting chip, the 8th to the 11st and
Second source；The current detecting chip includes the first pin, second pin, two the 3rd pins, the 4th pin and the 5th drawn
Pin；First pin of the current detecting chip is connected with the first end of the 8th resistance, and the of the current detecting chip
Two pins are connected with the second end of the 8th resistance, pass through described between two the 3rd pins of the current detecting chip
Nine resistance are connected in series with the tenth resistance；4th pin of the current detecting chip by the 11st resistance with it is described
Second source is connected, and the 5th pin of the current detecting chip is connected with the current control module, the current detecting core
5th pin output voltage of piece is to the current control module；The first end of 8th resistance also with the electronic switch
Second end is connected, and the second end of the 8th resistance is also connected with total output end.
In a preferred embodiment, the pulse signal generation module includes pulse signal generation chip, the second light
Coupler, driving chip, the 12nd to the 16th resistance and the 3rd electric capacity；Second photo-coupler include light-emitting component and by
Optical element；The driving chip includes the first pin, second pin, the 3rd pin and the 4th pin；The pulse signal is produced
Chip includes the first pin, second pin, the 3rd pin and the 4th pin；The pulse signal produce the first pin of chip with
The first end of 12nd resistance and the first end of the photo detector are connected, the second end of the 12nd resistance with it is described
First power supply is connected；The second end ground connection of the photo detector, the first end of the light-emitting component passes through the 13rd resistance
It is connected with the second source, the second end and the current control module and the voltage control module phase of the light-emitting component
Even；The second pin that the pulse signal produces chip is connected with first power supply, and the of the pulse signal generation chip
Three pins are connected by the 14th resistance with the first end of the second resistance and the second end of the photo detector, to connect
Receive the voltage of the second end output of the voltage and the photo detector of the first end output of the second resistance；The pulse signal
The 4th pin for producing chip is connected with the first pin of the driving chip, the second pin of the driving chip and described the
The first end of 15 resistance is connected, and the 3rd pin of the driving chip is connected with the first end of the 3rd electric capacity, described to drive
4th pin of dynamic chip is connected with the second end of the 3rd electric capacity, the second end of the 3rd electric capacity and the described 16th electricity
The first end of resistance is connected, and the second end of the 16th resistance is connected with the second end of the 15th resistance；Described 15th
Second end of resistance and the second end of the 16th resistance are also connected with the 3rd end of the electronic switch.
In a preferred embodiment, the current control module is put including the first analog-digital chip, the first computing
Big device, the 17th to the 21st resistance, the 4th to the 6th electric capacity and the second diode；First analog-digital chip includes
First pin, second pin, the 3rd pin and the 4th pin；The first pin and second pin of first analog-digital chip
It is connected with the main computer unit, the 3rd pin of first analog-digital chip is connected and by described with the constant pressure module
4th capacity earth, the 4th pin of first analog-digital chip is by the 5th capacity earth and passes through the described tenth
Seven resistance are connected with the in-phase input end of first operational amplifier, and the inverting input of first operational amplifier passes through
18th resistance is connected with the first end of the 19th resistance and the first end of the 20th resistance, and the described 19th
Second end of resistance is connected with the 5th pin of the current detecting chip, the second end ground connection of the 20th resistance；It is described
The inverting input of first operational amplifier is connected and described first by the 6th electric capacity and the 21st resistance
The output end of operational amplifier is connected, and the output end of first operational amplifier is connected with the negative electrode of second diode,
The anode of second diode is connected with the second end of the light-emitting component.
In a preferred embodiment, the voltage control module is put including the second analog-digital chip, the second computing
Big device, the 22nd to the 26th resistance, the 7th to the 9th electric capacity and the 3rd diode；The second analog-digital chip bag
Include the first pin, second pin, the 3rd pin and the 4th pin；First pin of second analog-digital chip and second draw
Pin is connected with the main computer unit, and the 3rd pin of second analog-digital chip is connected with the constant pressure module and by institute
State the 7th capacity earth, the 4th pin of second analog-digital chip is by the 8th capacity earth and passes through described
22 resistance are connected with the in-phase input end of second operational amplifier, the inverting input of second operational amplifier
It is connected by the 23rd resistance with the first end of the 24th resistance and the first end of the 25th resistance,
Second end of the 25th resistance is connected with total output end, the second end ground connection of the 25th resistance；It is described
The inverting input of second operational amplifier is connected and described second by the 9th electric capacity and the 26th resistance
The output end of operational amplifier is connected, and the output end of second operational amplifier is connected with the negative electrode of the 3rd diode,
The anode of 3rd diode is connected with the second end of the light-emitting component.
In a preferred embodiment, the constant pressure module include voltage conversion chip, the 3rd power supply, the tenth electric capacity and
11st electric capacity；The voltage conversion chip includes input pin and output pin；The input pin of the voltage conversion chip
It is connected with the 3rd power supply and by the tenth capacity earth, the output pin of the voltage conversion chip passes through described
11 capacity earths and the 3rd pin with first analog-digital chip and the 3rd of second analog-digital chip the draw
Pin is connected, and is powered with exporting constant voltage to first analog-digital chip and second analog-digital chip.
The battery charge control circuit of the present invention, control signal is artificially inputted by main computer unit to the current control
Module and the voltage control module, the current control module and the voltage control module are according to control signal output voltage
Signal controls the pulse signal to produce the dutycycle for the pulse signal that chip is produced, and then controls the conducting of the switch element
Time, so as to reach the output current and output voltage for controlling total output end, it is ensured that constant current constant voltage during Battery formation fills
Electricity.
【Brief description of the drawings】
The theory diagram for the battery charge control circuit that Fig. 1 provides for embodiment of the present invention.
Fig. 2 is the circuit diagram of the protection module shown in Fig. 1.
Fig. 3 is the circuit diagram of the current detecting unit shown in Fig. 1.
Fig. 4 is the switch element and the circuit diagram of pulse signal generation module shown in Fig. 1.
Fig. 5 is the circuit diagram of the current control module shown in Fig. 1.
Fig. 6 is the circuit diagram of the voltage control module shown in Fig. 1.
Fig. 7 is the circuit diagram of the constant pressure module shown in Fig. 1.
【Embodiment】
In order that the purpose of the present invention, technical scheme and advantageous effects become apparent from understanding, below in conjunction with this hair
Accompanying drawing in bright embodiment, the technical scheme in embodiment of the present invention is clearly and completely described, it is clear that retouched
The embodiment stated is only a part of embodiment of the invention, rather than whole embodiments.Based on the reality in the present invention
Apply mode, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made,
Belong to the scope of protection of the invention.
When an element was considered as with another element " being connected ", it can be directly to another element or
It may be simultaneously present centering elements.Unless otherwise defined, all of technologies and scientific terms used here by the article is with belonging to this hair
The implication that bright those skilled in the art are generally understood that is identical.Term used in the description of the invention herein
It is intended merely to describe the purpose of specific embodiment, it is not intended that in the limitation present invention.
Referring to Fig. 1, a kind of battery charge control circuit 100 that the present invention is provided, including protection module 10, switch element
20th, current detecting unit 30, pulse signal generation module 40, current control module 50, voltage control module 60, constant pressure module 70
And main computer unit 80.The protection module 10 and total input VIN, the switch element 20, total output end VOUT and the arteries and veins
Rush signal generator module 40 to be connected, the switch element 20 and the current detecting unit 30 and the pulse signal generation module
40 are connected, and the current detecting unit 30 is connected with total output end VOUT and the current control module 50, the pulse signal
Generation module 40 is connected with the current control module 50 and the voltage control module 60, the current control module 50 and institute
State constant pressure module 70 and the main computer unit 80 is connected, the voltage control module 60 and the constant pressure module 70, the main frame
Unit 80 and total output end VOUT are connected.Total input VIN is connected with power supply and receives the confession of the power supply
Piezoelectric voltage, total output end VOUT is connected with battery and battery is filled with the output voltage of total output end VOUT
Electricity.The protection module 10 is used to the electric current for flowing through the protection module 10 is changed into voltage and transmitted to the pulse signal
Generation module 40, flows through the i.e. described total output end VOUT of electric current of the protection module 10 output current, the protection module
10 also transmit the output voltage of total output end VOUT feedbacks to the pulse signal generation module 40, when total output
It is described when the output voltage for holding the voltage or total output end VOUT of VOUT output current conversion to feed back is more than predeterminated voltage
Pulse signal generation module 40 stops output pulse signal.The current detecting unit 30 is used to detect total output end VOUT
Output current and the output current detected changed into voltage transmitted to the current control module 50.The pulse signal
Generation module 40 is used to produce pulse signal.The constant pressure module 70 is used to provide constant voltage and to the current control mould
Block 50 and the voltage control module 60 are powered.The main computer unit 80 is used to transmit control signal to the current control mould
Block 50 or the voltage control module 60.The current control module 50 is used for the control signal for transmitting the main computer unit 80
Voltage is changed into, and the voltage transmitted according to the current detecting unit 30 turns with the control signal that the main computer unit 80 is transmitted
The voltage output control voltage of chemical conversion is to the pulse signal generation module 40.The voltage control module 60 is used for the master
The control signal that machine unit 80 is transmitted changes into voltage, and according to total output end VOUT output voltages fed back and the master
The voltage output control voltage that changes into of control signal that machine unit 80 is transmitted is to the pulse signal generation module 40.The arteries and veins
Control voltage and the voltage control module 60 that signal generator module 40 transmits according to the current control module 50 is rushed to transmit
Control voltage produce the pulse signal of corresponding dutycycle, and by the pulse signal transmission of generation to the switch element 20, control
Make the switch element 20 conducting with cut-off frequency so that control the output voltage of total output end VOUT size and
The size of the output current of total output end VOUT.
Referring to Fig. 2, the protection module 10 includes current transformer L1, the first to the 7th resistance R1-R7, the one or two pole
Pipe D1, the first electric capacity C1, the first power supply Vref1, the first photo-coupler OP1, the first voltage-stablizer TL1 and the second electric capacity C2.It is described
Current transformer L1 includes first coil J1 and the second coil J2.The first end of the first coil J1 and total input
VIN is connected, and the second end of the first coil J1 is connected with the switch element 20.The first end of the second coil J2 and institute
The first end for stating first resistor R1 is connected, and the second end of the second coil J2 is connected with the second end of the first resistor R1.
The first end of the first resistor R1 is connected with the anode of the first diode D1, the second termination of the first resistor R1
Ground.The negative electrode of the first diode D1 and the first end of the second resistance R2 and the first end phase of the first electric capacity C1
Even, the second end of the second resistance R2 and the second end of the first electric capacity C1 ground connection.The first end of the second resistance R2
Also it is connected with the pulse signal generation module 40, the first end output voltage Vis of the second resistance R2 to the pulse believes
Number generation module 40.The first photo-coupler OP1 includes light-emitting component D2 and photo detector T2.The of the light-emitting component D2
One end is connected by the 3rd resistor R3 with total output end VOUT, the second end of the light-emitting component D2 and the described 4th
Resistance R4 first end and the first end of the first voltage-stablizer TL1 are connected, the second end of the 4th resistance R4 and described the
Five resistance R5 first end is connected, the second end of the 5th resistance R5 and the first end of the 6th resistance R6, described first
Voltage-stablizer TL1 the second end and the second electric capacity C2 first end are connected.The second end of the 6th resistance R6, described first
Voltage-stablizer TL1 the 3rd end and the second end of the second electric capacity C2 ground connection.The first end of the photo detector T2 passes through described
7th resistance R7 is connected with the first power supply Vref1, and the second end and the pulse signal of the photo detector T2 produce mould
Block 40 is connected, the second end output voltage Vis of the photo detector T2 to the pulse signal generation module 40.When described first
When the voltage at voltage-stablizer TL1 the second end is more than preset value, first end and first voltage-stablizer of the first voltage-stablizer TL1
TL1 the 3rd end conducting.When the voltage of the first end of the light-emitting component D2 is more than the electricity at the second end of the light-emitting component D2
During pressure, the first end of the photo detector T2 and the second end of the photo detector T2 are turned on.
Referring to Fig. 4, the switch element 20 includes electronic switch Q1.The first end of the electronic switch Q1 and described the
One coil J1 the second end is connected, and the second end of the electronic switch Q1 is connected with the current detecting unit 30, the electronics
Switch Q1 the 3rd end is connected with the pulse signal generation module 40.In the present embodiment, the electronic switch Q1 is N-type
Metal-oxide-semiconductor, first end, the second end and the 3rd end of the electronic switch Q1 correspond to drain electrode, source electrode and the grid of metal-oxide-semiconductor respectively.
In other embodiment, the electronic switch Q1 can be triode or insulated gate bipolar transistor.
Referring to Fig. 3, the current detecting unit 30 includes current detecting chip U1, the 8th to the 11st R8-R11 and the
Two power supply V2.The current detecting chip U1 draws including the first pin-IN, second pin+IN, two the 3rd pin R_G, four
Pin+VS and the 5th pin V_OUT.The the first pin-IN and the 8th resistance R8 of the current detecting chip U1 first end
It is connected, the second pin+IN of the current detecting chip U1 is connected with the second end of the 8th resistance R8, the current detecting
Being connected in series by the 9th resistance R9 and the tenth resistance R10 between chip U1 two the 3rd pin R_G.The electric current
Detection chip U1 the 4th pin+VS is connected by the 11st resistance R11 with the second source V2, the current detecting
Chip U1 the 5th pin V_OUT is connected with the current control module 50, the 5th pin V_ of the current detecting chip U1
OUT output voltages V_isence is to the current control module 50.The first end of the 8th resistance R8 also with the electronic cutting
The second end for closing Q1 is connected, and the second end of the 8th resistance R8 is also connected with total output end VOUT.In present embodiment
In, the 8th resistance R8 is precision resistance, for detecting the electricity between total input VIN and total output end VOUT
Stream.
Referring again to Fig. 4, the pulse signal generation module 40 includes pulse signal and produces chip U2, the second photo-coupler
OP2, driving chip U3, the 12nd to the 16th resistance R12-R16 and the 3rd electric capacity C3.The second photo-coupler OP2 includes
Light-emitting component D3 and photo detector T3.The driving chip U3 includes the first pin HI, second pin HO, the 3rd pin HB and the
Four pin HS.The pulse signal produce chip U2 include the first pin COMP, second pin VREF, the 3rd pin ISENSE and
4th pin GATE.The pulse signal produces chip U2 the first pin COMP and the 12nd resistance R12 first end
And the first end of the photo detector T3 is connected, the second end of the 12nd resistance R12 and the first power supply Vref1 phases
Even.The second end ground connection of the photo detector T3, the first end of the light-emitting component D3 passes through the 13rd resistance R13 and institute
State second source V2 to be connected, the second end of the light-emitting component D3 and the current control module 50 and the voltage control module
60 are connected.The second pin VREF that the pulse signal produces chip U2 is connected with the first power supply Vref1, the pulse letter
Number produce first ends and institute of chip U2 the 3rd pin ISENSE by the 14th resistance R14 and second resistance R2
The second end for stating photo detector T2 is connected, to receive voltage Vis and the light that the first end of the second resistance R2 is exported
The voltage Vis of element T2 the second end output.The pulse signal produces chip U2 the 4th pin GATE and the driving core
Piece U3 the first pin HI is connected, the second pin HO of the driving chip U3 and the 15th resistance R15 first end phase
Even, the 3rd pin HB of the driving chip U3 is connected with the first end of the 3rd electric capacity C3, and the of the driving chip U3
Four pin HS are connected with the second end of the 3rd electric capacity C3, the second end and the 16th resistance of the 3rd electric capacity C3
R16 first end is connected, and the second end of the 16th resistance R16 is connected with the second end of the 15th resistance R15.It is described
The 3rd end phase of 15th resistance R15 the second end and the second end of the 16th resistance R16 also with the electronic switch Q1
Even.
Referring to Fig. 5, the current control module 50 include the first analog-digital chip U4, the first operational amplifier U5,
17th to the 21st resistance R17-R21, the 4th to the 6th electric capacity C4-C6 and the second diode D4.First digital-to-analogue turns
Changing chip U4 includes the first pin SDA, second pin SCL, the 3rd pin VREF and the 4th pin VOUT.First digital-to-analogue turns
The the first pin SDA and second pin SCL for changing chip U4 are connected with the main computer unit 80, the first analog-digital chip U4
The 3rd pin VREF be connected with the constant pressure module 70 and by the 4th electric capacity C4 be grounded, the first digital-to-analogue conversion core
Piece U4 the 4th pin VOUT is grounded by the 5th electric capacity C5 and passes through the 17th resistance R17 and first computing
Amplifier U5 in-phase input end is connected, and the inverting input of the first operational amplifier U5 passes through the 18th resistance
R18 is connected with the first end of the 19th resistance R19 and the first end of the 20th resistance R20, the 19th resistance
R19 the second end is connected with the 5th pin V_OUT of the current detecting chip U1, the second end of the 20th resistance R20
Ground connection.The inverting input of the first operational amplifier U5 passes through the 6th electric capacity C6 and the 21st resistance R21
Series connection be connected with the output end of the first operational amplifier U5, the output end of the first operational amplifier U5 and described the
Two diode D4 negative electrode is connected, and the anode of the second diode D4 is connected with the second end of the light-emitting component D3.
Referring to Fig. 6, the voltage control module 60 include the second analog-digital chip U6, the second operational amplifier U7,
22nd to the 26th resistance R22-R26, the 7th to the 9th electric capacity C7-C9 and the 3rd diode D5.Second digital-to-analogue
Conversion chip U6 includes the first pin SDA, second pin SCL, the 3rd pin VREF and the 4th pin VOUT.Second digital-to-analogue
Conversion chip U6 the first pin SDA and second pin SCL is connected with the main computer unit 80, second analog-digital chip
U6 the 3rd pin VREF is connected with the constant pressure module 70 and is grounded by the 7th electric capacity C7, second digital-to-analogue conversion
Chip U6 the 4th pin VOUT is grounded by the 8th electric capacity C8 and passes through the 22nd resistance R22 and described second
Operational amplifier U7 in-phase input end is connected, and the inverting input of the second operational amplifier U7 passes through the described 23rd
Resistance R23 is connected with the first end of the 24th resistance R24 and the first end of the 25th resistance R25, and described
25 resistance R25 the second end is connected with total output end VOUT, the second end ground connection of the 25th resistance R25.
The inverting input of the second operational amplifier U7 is connected by the 9th electric capacity C9 and the 26th resistance R26's
It is connected with the output end of the second operational amplifier U7, output end and the three or two pole of the second operational amplifier U7
Pipe D5 negative electrode is connected, and the anode of the 3rd diode D5 is connected with the second end of the light-emitting component D3.
Referring to Fig. 7, the constant pressure module 70 includes voltage conversion chip U8, the 3rd power supply V3, the tenth electric capacity C10 and the
11 electric capacity C11.The voltage conversion chip U8 includes input pin Vin and output pin Vout.The voltage conversion chip
U8 input pin Vin is connected with the 3rd power supply V3 and is grounded by the tenth electric capacity C10, the voltage conversion chip
U8 output pin Vout be grounded by the 11st electric capacity C11 and with the 3rd pin of the first analog-digital chip U4
VREF and the second analog-digital chip U6 the 3rd pin VREF are connected, to export constant voltage Vref2 to described first
Analog-digital chip U4 and the second analog-digital chip U6 power.
The main computer unit 80 is connected by CAN with computer, the data signal for receiving computer transmission, and
By the digital data transmission to the current control module 50 or the voltage control module 60.
The operation principle to the battery charge control circuit 100 is illustrated below.
During work, the constant pressure module 70 exports constant voltage Vref2 to the 3rd of the first analog-digital chip U4
Pin VREF and the second analog-digital chip U6 the 3rd pin VREF, with to the first analog-digital chip U4 and institute
State the second analog-digital chip U6 to power, the power supply inputs the battery charge control electricity from total input VIN
Road 100, is output as battery by the protection module 10, the switch element 20 and the current detecting unit 30 and charges, institute
State current detecting unit 30 and the output current of total output end VOUT is changed into by voltage by the 8th resistance R8, and lead to
Cross after the current detecting chip U1 handles the voltage at the 8th resistance R8 two ends by the current detecting chip U1's
5th pin V_OUT is exported to the 19th resistance R19 of the current control module 50 the second end, if total output
VOUT output current increase is held, operator is inputted the first control signal to the main computer unit 80 by computer, described
First control signal is data signal, and the main computer unit 80 transmits first control signal to the current control module
50 the first analog-digital chip U4 the first pin SDA and second pin SCL, the first analog-digital chip U4 will be described
First control signal is converted into the first analog voltage and transmitted by the 4th pin VOUT of the first analog-digital chip U4
To the in-phase input end of the first operational amplifier U5, first analog voltage is less than the of the current detecting chip U1
The voltage of the voltage V_isence, the first operational amplifier U5 of five pin V_OUT outputs output end output is gradually reduced,
Resistance between the photo detector T2 first ends of the second photo-coupler OP2 and the second end is gradually reduced, the pulse signal
The voltage for producing chip U2 the first pin COMP is gradually reduced, and the 4th pin GATE that the pulse signal produces chip U2 is defeated
The dutycycle of the pulse signal gone out is gradually reduced so that the ON time of the electronic switch Q1 reduces, and then total output
VOUT output current is held to reduce；If the output current of total output end VOUT reduces, operator is by computer by second
Control signal is inputted to the main computer unit 80, and second control signal is data signal, and the main computer unit 80 will be described
Second control signal, which is transmitted to the first analog-digital chip U4 of the current control module 50 the first pin SDA and second, draws
Second control signal is converted into the second analog voltage and by described by pin SCL, the first analog-digital chip U4
One analog-digital chip U4 the 4th pin VOUT is transmitted to the in-phase input end of the first operational amplifier U5, described second
Analog voltage is more than the voltage V_isence that the 5th pin V_OUT of the current detecting chip U1 is exported, first computing
The voltage of amplifier U5 output end output gradually increases, the photo detector T2 first ends of the second photo-coupler OP2 and the
Resistance between two ends gradually increases, and the voltage that the pulse signal produces chip U2 the first pin COMP gradually increases, institute
The dutycycle for stating the pulse signal of pulse signal generation chip U2 the 4th pin GATE outputs gradually increases so that the electronics
Switch Q1 ON time increase, and then the output current increase of total output end VOUT.If total output end VOUT's
Output voltage increases, and operator is inputted the 3rd control signal to the main computer unit 80, the 3rd control by computer
Signal is data signal, and the main computer unit 80 transmits the 3rd control signal to the second of the voltage control module 60
Analog-digital chip U6 the first pin SDA and second pin SCL, the second analog-digital chip U6 is controlled the described 3rd
Signal is converted into the 3rd analog voltage and transmitted by the 4th pin VOUT of the second analog-digital chip U6 to described
Two operational amplifier U7 in-phase input end, the 3rd analog voltage is less than the output voltage of total output end VOUT, institute
The voltage for stating the second operational amplifier U7 output end output is gradually reduced, the photo detector T2 of the second photo-coupler OP2
Resistance between first end and the second end is gradually reduced, the pulse signal produce chip U2 the first pin COMP voltage by
Decrescence small, the dutycycle that the pulse signal produces the pulse signal of chip U2 the 4th pin GATE outputs is gradually reduced, and is made
The ON time for obtaining the electronic switch Q1 reduces, and then the output voltage of total output end VOUT reduces；If described total defeated
Go out to hold VOUT output voltage to reduce, operator is inputted the 4th control signal to the main computer unit 80, institute by computer
The 4th control signal is stated for data signal, the 4th control signal is transmitted to the voltage and controls mould by the main computer unit 80
Second analog-digital chip U6 of block 60 the first pin SDA and second pin SCL, the second analog-digital chip U6 is by institute
The 4th control signal is stated to be converted into the 4th analog voltage and pass by the 4th pin VOUT of the second analog-digital chip U6
The in-phase input end of the second operational amplifier U7 is transported to, the 4th analog voltage is more than the defeated of total output end VOUT
Go out voltage, the voltage of the output end output of the second operational amplifier U7 gradually increases, the second photo-coupler OP2 by
Resistance between optical element T2 first ends and the second end gradually increases, and the pulse signal produces chip U2 the first pin COMP
Voltage gradually increase, the pulse signal produces the dutycycle of the pulse signal of chip U2 the 4th pin GATE outputs gradually
Increase so that the ON time increase of the electronic switch Q1, and then the output voltage increase of total output end VOUT.
The output current of total output end VOUT is also passed through described by the current transformer L1 of the protection module 10
The voltage Vis that one resistance R1 and the second resistance R2 change into the first end output of the second resistance R2 is transmitted to the arteries and veins
The 3rd pin ISENSE that signal produces chip U2 is rushed, when the voltage Vis that the first end of the second resistance R2 is exported is more than in advance
If during voltage, the 4th pin GATE that the pulse signal produces chip U2 stops output pulse signal, the electronic switch Q1
Disconnect, to avoid rechargeable battery because electric current is excessive and damages.First photo-coupler OP1 of the protection module 10 will also be described total
Output end VOUT output voltage is transmitted to the pulse signal by the second end of the photo detector T2 and produces chip U2's
3rd pin ISENSE, when the output voltage of total output end VOUT is more than predeterminated voltage, the pulse signal produces core
Piece U2 the 4th pin GATE stops output pulse signal, and the electronic switch Q1 disconnects, to avoid rechargeable battery because of voltage mistake
Damage greatly.
The battery charge control circuit 100 of the present invention, control signal is artificially inputted by main computer unit 80 to the electricity
Flow control module 50 and the voltage control module 60, the current control module 50 and the voltage control module 60 are according to control
Signal output voltage signal processed controls the pulse signal to produce the dutycycle for the pulse signal that chip U2 is produced, and then controls institute
The ON time of switch element 20 is stated, so as to reach the output current and output voltage for controlling total output end VOUT, it is ensured that
Constant-current constant-voltage charging during Battery formation.
The present invention is not restricted to described in specification and embodiment, therefore for the personnel of familiar field
Additional advantage and modification is easily achieved, therefore in the essence of the universal limited without departing substantially from claim and equivalency range
In the case of refreshing and scope, the present invention is not limited to specific details, representational equipment and shown here as the diagram with description
Example.
Claims (9)
1. a kind of battery charge control circuit, it is characterised in that：Including protection module, switch element, current detecting unit, pulse
Signal generator module, current control module, voltage control module, constant pressure module and main computer unit；The protection module with it is total defeated
Enter end, the switch element, total output end and the pulse signal generation module to be connected, the switch element is examined with the electric current
Survey unit and the pulse signal generation module is connected, the current detecting unit and total output end and the current control module
It is connected, the pulse signal generation module is connected with the current control module and the voltage control module, the electric current control
Molding block is connected with the constant pressure module and the main computer unit, the voltage control module and the constant pressure module, the master
Machine unit and total output end are connected；The protection module is used to the electric current for flowing through the protection module is changed into voltage and transmitted
To the pulse signal generation module, the output current of the i.e. described total output end of electric current of the protection module, the guarantor are flowed through
Shield module also transmits the output voltage of total output end feedback to the pulse signal generation module, when total output end
The voltage of output current conversion or the output voltage of total output end feedback when being more than predeterminated voltage, the pulse signal production
Raw module stops output pulse signal；The current detecting unit is used for the output current for detecting total output end and will detection
To output current change into voltage and transmit to the current control module；The pulse signal generation module is used to produce pulse
Signal；The constant pressure module is used to provide constant voltage and supplied to the current control module and the voltage control module
Electricity；The main computer unit is used to transmit control signal to the current control module or the voltage control module；The electricity
The control signal that flow control module is used to transmit the main computer unit changes into voltage, and is passed according to the current detecting unit
Voltage output control voltage to the pulse signal that the control signal that defeated voltage is transmitted with the main computer unit is changed into is produced
Raw module；The control signal that the voltage control module is used to transmit the main computer unit changes into voltage, and according to described
The voltage output control voltage that the control signal that the output voltage of total output end feedback is transmitted with the main computer unit is changed into is extremely
The pulse signal generation module；Control voltage that the pulse signal generation module is transmitted according to the current control module and
The control voltage of voltage control module transmission produces the pulse signal of corresponding dutycycle, and by the pulse signal transmission of generation
To the switch element, the frequency of the conducting and cut-off of the switch element is controlled, so as to control the output of total output end
The output current of voltage and total output end.
2. battery charge control circuit as claimed in claim 1, it is characterised in that：The protection module includes Current Mutual Inductance
Device, the first to the 7th resistance, the first diode, the first electric capacity, the first power supply, the first photo-coupler, the first voltage-stablizer and second
Electric capacity；The current transformer includes first coil and the second coil；The first end of the first coil and total input
It is connected, the second end of the first coil is connected with the switch element；The first end of second coil and the described first electricity
The first end of resistance is connected, and the second end of second coil is connected with the second end of the first resistor；The first resistor
First end is connected with the anode of first diode, the second end ground connection of the first resistor；The moon of first diode
Pole is connected with the first end of the second resistance and the first end of first electric capacity, the second end of the second resistance and described
The second end ground connection of first electric capacity；The first end of the second resistance is also connected with the pulse signal generation module, and described
The first end output voltage of two resistance is to the pulse signal generation module；First photo-coupler include light-emitting component and by
Optical element；The first end of the light-emitting component is connected by the 3rd resistor with total output end, the light-emitting component
Second end is connected with the first end of the 4th resistance and the first end of first voltage-stablizer, the second end of the 4th resistance
It is connected with the first end of the 5th resistance, the first end of the second end of the 5th resistance and the 6th resistance, described the
The first end of second end of one voltage-stablizer and second electric capacity is connected；Second end of the 6th resistance, first voltage stabilizing
3rd end of device and the second end ground connection of second electric capacity；The first end of the photo detector passes through the 7th resistance and institute
State the first power supply to be connected, the second end of the photo detector is connected with the pulse signal generation module, the photo detector
Second end output voltage is to the pulse signal generation module.
3. battery charge control circuit as claimed in claim 2, it is characterised in that：The switch element includes electronic switch,
The first end of the electronic switch is connected with the second end of the first coil, the second end and the electric current of the electronic switch
Detection unit is connected, and the 3rd end of the electronic switch is connected with the pulse signal generation module.
4. battery charge control circuit as claimed in claim 3, it is characterised in that：The electronic switch is N-type metal-oxide-semiconductor, institute
First end, the second end and the 3rd end for stating electronic switch correspond to drain electrode, source electrode and the grid of metal-oxide-semiconductor respectively.
5. battery charge control circuit as claimed in claim 4, it is characterised in that：The current detecting unit is examined including electric current
Survey chip, the 8th to the 11st and second source；The current detecting chip include the first pin, second pin, two the 3rd
Pin, the 4th pin and the 5th pin；First pin of the current detecting chip is connected with the first end of the 8th resistance,
The second pin of the current detecting chip is connected with the second end of the 8th resistance, two of the current detecting chip
Being connected in series by the 9th resistance and the tenth resistance between three pins；4th pin of the current detecting chip passes through
11st resistance is connected with the second source, the 5th pin and the current control module of the current detecting chip
It is connected, the 5th pin output voltage of the current detecting chip to the current control module；The first of 8th resistance
End is also connected with the second end of the electronic switch, and the second end of the 8th resistance is also connected with total output end.
6. battery charge control circuit as claimed in claim 5, it is characterised in that：The pulse signal generation module includes arteries and veins
Rush signal and produce chip, the second photo-coupler, driving chip, the 12nd to the 16th resistance and the 3rd electric capacity；Second light
Coupler includes light-emitting component and photo detector；The driving chip includes the first pin, second pin, the 3rd pin and the 4th
Pin；The pulse signal, which produces chip, includes the first pin, second pin, the 3rd pin and the 4th pin；The pulse letter
The first pin for number producing chip is connected with the first end of the 12nd resistance and the first end of the photo detector, and described the
Second end of 12 resistance is connected with first power supply；The second end ground connection of the photo detector, the of the light-emitting component
One end is connected by the 13rd resistance with the second source, the second end of the light-emitting component and the current control mould
Block and the voltage control module are connected；The second pin that the pulse signal produces chip is connected with first power supply, institute
State pulse signal produce the 3rd pin of chip by the first end of the 14th resistance and the second resistance and it is described by
Second end of optical element is connected, to receive the second end of voltage that the first end of the second resistance exports and the photo detector
The voltage of output；The 4th pin that the pulse signal produces chip is connected with the first pin of the driving chip, described to drive
The second pin of dynamic chip is connected with the first end of the 15th resistance, the 3rd pin and the described 3rd of the driving chip
The first end of electric capacity is connected, and the 4th pin of the driving chip is connected with the second end of the 3rd electric capacity, the 3rd electricity
The second end held is connected with the first end of the 16th resistance, the second end and the 15th resistance of the 16th resistance
The second end be connected；Second end of the 15th resistance and the second end of the 16th resistance also with the electronic switch
3rd end is connected.
7. battery charge control circuit as claimed in claim 6, it is characterised in that：The current control module includes the first number
Mould conversion chip, the first operational amplifier, the 17th to the 21st resistance, the 4th to the 6th electric capacity and the second diode；Institute
Stating the first analog-digital chip includes the first pin, second pin, the 3rd pin and the 4th pin；The first digital-to-analogue conversion core
The first pin and second pin of piece are connected with the main computer unit, the 3rd pin of first analog-digital chip with it is described
Constant pressure module is connected and by the 4th capacity earth, and the 4th pin of first analog-digital chip passes through the described 5th
Capacity earth is simultaneously connected by the 17th resistance with the in-phase input end of first operational amplifier, first computing
First end and the 20th resistance that the inverting input of amplifier passes through the 18th resistance and the 19th resistance
First end be connected, the second end of the 19th resistance is connected with the 5th pin of the current detecting chip, described second
The second end ground connection of ten resistance；The inverting input of first operational amplifier passes through the 6th electric capacity and the described 20th
The series connection of one resistance is connected with the output end of first operational amplifier, the output end of first operational amplifier with it is described
The negative electrode of second diode is connected, and the anode of second diode is connected with the second end of the light-emitting component.
8. battery charge control circuit as claimed in claim 7, it is characterised in that：The voltage control module includes the second number
Mould conversion chip, the second operational amplifier, the 22nd to the 26th resistance, the 7th to the 9th electric capacity and the 3rd diode；
Second analog-digital chip includes the first pin, second pin, the 3rd pin and the 4th pin；Second digital-to-analogue conversion
The first pin and second pin of chip are connected with the main computer unit, the 3rd pin of second analog-digital chip and institute
State constant pressure module to be connected and by the 7th capacity earth, the 4th pin of second analog-digital chip passes through described the
Eight capacity earths are simultaneously connected by the 22nd resistance with the in-phase input end of second operational amplifier, and described second
The inverting input of operational amplifier passes through the first end of the 23rd resistance and the 24th resistance and described the
The first end of 25 resistance is connected, and the second end of the 25th resistance is connected with total output end, and the described 20th
The second end ground connection of five resistance；The inverting input of second operational amplifier passes through the 9th electric capacity and the described 20th
The series connection of six resistance is connected with the output end of second operational amplifier, the output end of second operational amplifier with it is described
The negative electrode of 3rd diode is connected, and the anode of the 3rd diode is connected with the second end of the light-emitting component.
9. battery charge control circuit as claimed in claim 8, it is characterised in that：The constant pressure module includes voltage conversion core
Piece, the 3rd power supply, the tenth electric capacity and the 11st electric capacity；The voltage conversion chip includes input pin and output pin；It is described
The input pin of voltage conversion chip is connected with the 3rd power supply and by the tenth capacity earth, the voltage conversion core
Threeth pin and described of the output pin of piece by the 11st capacity earth and with first analog-digital chip
3rd pin of two analog-digital chips is connected, to export constant voltage to first analog-digital chip and second number
Mould conversion chip is powered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710425989.4A CN107171389A (en) | 2017-06-08 | 2017-06-08 | Battery charge control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710425989.4A CN107171389A (en) | 2017-06-08 | 2017-06-08 | Battery charge control circuit |
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| Publication Number | Publication Date |
|---|---|
| CN107171389A true CN107171389A (en) | 2017-09-15 |
Family
ID=59824962
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710425989.4A Pending CN107171389A (en) | 2017-06-08 | 2017-06-08 | Battery charge control circuit |
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| Country | Link |
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| CN (1) | CN107171389A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114977370A (en) * | 2022-03-09 | 2022-08-30 | 深圳市南霸科技有限公司 | Charging system |
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| CN2241410Y (en) * | 1996-01-17 | 1996-11-27 | 罗之洪 | Nickel-cadmium battery charger |
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Application publication date: 20170915 |