CN110289654A - A kind of charger and its charging circuit, charging control circuit - Google Patents
A kind of charger and its charging circuit, charging control circuit Download PDFInfo
- Publication number
- CN110289654A CN110289654A CN201910552530.XA CN201910552530A CN110289654A CN 110289654 A CN110289654 A CN 110289654A CN 201910552530 A CN201910552530 A CN 201910552530A CN 110289654 A CN110289654 A CN 110289654A
- Authority
- CN
- China
- Prior art keywords
- power supply
- charging
- voltage
- switching power
- current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000007600 charging Methods 0.000 title claims abstract description 118
- 230000001105 regulatory effect Effects 0.000 claims abstract description 10
- 230000005611 electricity Effects 0.000 claims description 20
- 230000001276 controlling effect Effects 0.000 claims description 19
- 230000006641 stabilisation Effects 0.000 claims description 4
- 238000011105 stabilization Methods 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 239000003990 capacitor Substances 0.000 description 20
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000004146 energy storage Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 102100039435 C-X-C motif chemokine 17 Human genes 0.000 description 1
- 101000889048 Homo sapiens C-X-C motif chemokine 17 Proteins 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 210000004709 eyebrow Anatomy 0.000 description 1
- 230000009123 feedback regulation Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- H02J7/0085—
-
- H02J7/0086—
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a kind of charger and its charging circuits, charging control circuit, and by the current voltage of voltage collection circuit acquisition battery, current collection circuit acquires the current charging current of battery；Charge control module is according to the current voltage of the battery and current charging current, determine the voltage exported needed for Switching Power Supply, the voltage of the output according to needed for Switching Power Supply makes Switching Power Supply export the required voltage exported come the received feedback signal of regulating switch power supply；The Switching Power Supply is for charging the battery.It is also able to achieve the adjustment to Switching Power Supply output without battery charging management chip as a result, to realize the multistage charging of battery, is reduced costs.
Description
Technical field
It charges field the present invention relates to battery, and in particular to a kind of charger and its charging circuit, charging control circuit.
Background technique
With the development of the times, energy storage technology is the transformation of future source of energy structure and the strategy that power generation consumption pattern is changed
Property support.In the case where energy storage technology develops and be commercialized trend promotion, battery is received extensive attention as one of leading role.
Battery is as energy storaging product, in recycling, unavoidably needs to charge.If charging is unreasonable, without needle
It is effectively charged to its chemical property, it will greatly reduce service life and utilization rate, cause battery is premature to scrap.Not only
Reduce product itself use value.Simultaneously due also to battery belongs to heavily contaminated product, recycling and processing difficulty are higher, if scrapped
It is too fast, aggravate the pollution of environment.
Existing charging modes generally use Switching Power Supply and battery charging management chip to carry out Charge Management, switch electricity
The direct current of source output charges the battery managing chip, after battery charging management chip is adjusted the direct current of input
It exports to battery, so that three sections or four sections chargings of battery are realized, to improve battery life and utilization rate.But battery charging valve
Reason chip price is expensive, and cost is too high.
Summary of the invention
Present invention generally provides a kind of charger and its charging circuit, charging control circuit, with reduce charging circuit at
This.
One embodiment provides a kind of charging control circuit of battery, comprising:
Voltage collection circuit, for acquiring the current voltage of battery；
Current collection circuit, for acquiring the current charging current of battery；
Charge control module, for determining Switching Power Supply according to the current voltage of the battery and current charging current
The voltage of required output, the voltage of the output according to needed for Switching Power Supply make to switch come the received feedback signal of regulating switch power supply
Power supply exports the required voltage exported；The Switching Power Supply is for charging the battery.
In the charging control circuit, charge control module is according to the current voltage of the battery and current charging electricity
Stream determines that the voltage exported needed for Switching Power Supply, the voltage of the output according to needed for Switching Power Supply are received come regulating switch power supply
Feedback signal includes:
According to the current voltage of the battery and current charging current, charging voltage needed for battery or required charging are obtained
Electric current, the charging voltage according to needed for battery or required charging current obtain the voltage of output needed for Switching Power Supply；By Switching Power Supply
The voltage of required output is converted into corresponding pwm signal, passes through the received feedback signal of pwm signal regulating switch power supply.
In the charging control circuit, the charge control module includes:
Charge controlling chip, for determining Switching Power Supply according to the current voltage of the battery and current charging current
The voltage of required output, and the voltage of output needed for Switching Power Supply is converted into corresponding pwm signal；
Electrical level transferring chip, for adjusting the amplitude of the pwm signal；
RC filter circuit, the pwm signal for exporting electrical level transferring chip are converted into DC level signal；
Optocoupler, for coupling and being exported to the feedback signal receiving end of Switching Power Supply by the DC level signal.
In the charging control circuit, the charge control module further include:
Follower, the DC level signal for exporting to the RC filter circuit follow；
Operational amplifier, the normal phase input end input of the operational amplifier follows that treated DC level signal, institute
The voltage that currently exports of Switching Power Supply after stating the inverting input terminal input partial pressure of operational amplifier, the operational amplifier it is defeated
Outlet is connect by the way of negative-feedback with the inverting input terminal；The output end of the operational amplifier is defeated with the optocoupler
Enter end connection, to control the working condition of the optocoupler.
In the charging control circuit, the electrical level transferring chip is 74CT244PWR chip, the charge control core
Piece is STM32F103C8T6 chip.
One embodiment provides a kind of charging circuit of battery, including Switching Power Supply and charge control as described above electricity
Road；The output end of the charging control circuit is connect with the feedback signal receiving end of the Switching Power Supply.
In the charging circuit, the Switching Power Supply includes Switching Power Supply control chip, for according to the feedback letter
Number PWM control is carried out to the switching tube of Switching Power Supply, the voltage stabilization for exporting Switching Power Supply is corresponding in the feedback signal
Voltage.
In the charging circuit, the Switching Power Supply is inverse-excitation type switch power-supply.
In the charging circuit, the Switching Power Supply control chip of the Switching Power Supply is UC2844 chip, described
The end COMP of UC2844 chip is the feedback signal receiving end of the Switching Power Supply, the output end company with the charging control circuit
It connects.
One embodiment provides a kind of charger, including charging circuit as described above.
According to the charger and its charging circuit, charging control circuit of above-described embodiment, electricity is acquired by voltage collection circuit
The current voltage in pond, current collection circuit acquire the current charging current of battery；Charge control module is current according to the battery
Voltage and current charging current, determine the voltage exported needed for Switching Power Supply, the voltage of the output according to needed for Switching Power Supply
Carry out the received feedback signal of regulating switch power supply, Switching Power Supply is made to export the required voltage exported；The Switching Power Supply is used
In charging the battery.It is also able to achieve the adjustment to Switching Power Supply output without battery charging management chip as a result, to realize electricity
The multistage in pond charges, and reduces costs.
Detailed description of the invention
Fig. 1 is the structural block diagram of charging circuit provided in an embodiment of the present invention；
Fig. 2 is the circuit diagram of electrical level transferring chip and its peripheral circuit；
Fig. 3 is the circuit diagram of the charge control module in addition to charge controlling chip and electrical level transferring chip；
Fig. 4 is the circuit diagram of voltage collection circuit；
Fig. 5 is the circuit diagram of current collection circuit.
Specific embodiment
Below by specific embodiment combination attached drawing, invention is further described in detail.Wherein different embodiments
Middle similar component uses associated similar element numbers.In the following embodiments, many datail descriptions be in order to
The application is better understood.However, those skilled in the art can recognize without lifting an eyebrow, part of feature
It is dispensed, or can be substituted by other elements, material, method in varied situations.In some cases, this Shen
Please it is relevant it is some operation there is no in the description show or describe, this is the core in order to avoid the application by mistake
More descriptions are flooded, and to those skilled in the art, these relevant operations, which are described in detail, not to be necessary, they
Relevant operation can be completely understood according to the general technology knowledge of description and this field in specification.
It is formed respectively in addition, feature described in this description, operation or feature can combine in any suitable way
Kind embodiment.Meanwhile each step in method description or movement can also can be aobvious and easy according to those skilled in the art institute
The mode carry out sequence exchange or adjustment seen.Therefore, the various sequences in the description and the appended drawings are intended merely to clearly describe a certain
A embodiment is not meant to be necessary sequence, and wherein some sequentially must comply with unless otherwise indicated.
It is herein component institute serialization number itself, such as " first ", " second " etc., is only used for distinguishing described object,
Without any sequence or art-recognized meanings.And " connection ", " connection " described in the application, unless otherwise instructed, include directly and
It is indirectly connected with (connection).
Charger provided by the invention includes that shell and setting are provided with charging on the intracorporal pcb board of shell, the pcb board
Circuit.As shown in Figure 1, the charging circuit includes Switching Power Supply 10 and charging control circuit, the output end of charging control circuit
It is connect with the feedback signal receiving end of Switching Power Supply 10.Wherein, charging control circuit includes current collection circuit 30, voltage acquisition
Circuit 40 and charge control module 20.
Switching Power Supply 10 can be using direct-current switch power supply or using alternating-current switch power supply, and the present embodiment is with inverse-excitation type
It is illustrated for Switching Power Supply, is used to power to battery 50, including major loop 110 and control loop 120.Major loop 110
For the access that power current in Switching Power Supply 10 flows through, the functions such as rectification, filtering, energy storage, switch including routine.Switching Power Supply
The input terminal input AC electricity of the major loop 110 of circuit, such as alternating current, output end connects battery 50, and passes through control loop 120
Carry out feedback regulation.Control loop 120 is depressured using PWM control mode, and acquires the voltage or electricity of the output of major loop 110
Stream obtains feedback signal, and the stabilization of output voltage is maintained by feedback signal.Specifically, control loop 120 includes switch electricity
Source controls chip, for carrying out PWM control to the switching tube on major loop 10 based on the feedback signal, the electricity for exporting major loop 10
Pressure is stablized in the corresponding voltage of feedback signal.The present invention is the improvement to circuit, therefore " connection " in text is electrical connection.
Current collection circuit 30 is for acquiring the current charging current of battery 50, for example, the acquisition output of major loop 110 is straight
Charging current of the electric current of galvanic electricity as battery 50.
Voltage collection circuit 40 is for acquiring the current voltage of battery 50.
Charge control module 20 is used to analyze battery 50 according to the current voltage of battery 50 and current charging current and work as
Preceding charged state, charging voltage needed for determining battery 50 or required charging current, the charging voltage according to needed for battery or required
Charging current obtains the voltage exported needed for Switching Power Supply, such as battery 50 needs constant-current charge, then the electricity of Switching Power Supply output
Pressure needs to be continuously improved, and battery 50 needs constant-voltage charge, then the voltage needs of Switching Power Supply output remain unchanged；And then basis is opened
The voltage exported needed for powered-down source carrys out the received feedback signal of regulating switch power supply control chip, Switching Power Supply control chip according to
Received feedback signal carries out PWM control automatically, the voltage exported needed for exporting major loop 110, so that battery 50
Charging voltage or charging current meet charging requirement.
The present invention controls the received feedback signal of chip by changing Switching Power Supply, to change the output of Switching Power Supply 10,
To realize the adjustment to 50 charging voltage of battery or charging current, battery is also able to achieve without battery charging management chip
Multistage charging, reduces costs.
Further, the voltage of the output according to needed for Switching Power Supply of charge control module 20 is received come regulating switch power supply
Feedback signal includes: that the voltage of output needed for Switching Power Supply is converted into corresponding pwm signal, is adjusted by the pwm signal
Switching Power Supply controls the received feedback signal of chip.
Specifically, as shown in Figures 2 and 3, charge control module 20 includes RC filter circuit 210, follower 220, operation
Amplifier Q1, charge controlling chip, electrical level transferring chip U1 and optocoupler U2.
Charge controlling chip is used to determine and fill needed for battery 50 according to the current voltage of battery 50 and current charging current
Piezoelectric voltage or required charging current, the charging voltage according to needed for battery or required charging current obtain output needed for Switching Power Supply
Voltage, and the voltage of output needed for Switching Power Supply is converted into corresponding pwm signal.In the present embodiment, charge controlling chip is
STM32F103C8T6 chip.
Since charge controlling chip output voltage is usually 3.3V, electrical level transferring chip U1 is for improving the charge control
The amplitude of the pwm signal of chip output, to match subsequent conditioning circuit.In the present embodiment, electrical level transferring chip is 74CT244PWR core
Piece is specifically used for being that the pwm signal of+3.3V is converted into the pwm signal of+5V by the amplitude that charge controlling chip exports.
The pwm signal that RC filter circuit 210 is used to export electrical level transferring chip is converted into DC level signal.
The DC level signal that follower 220 is used to export RC filter circuit 210 follows, and makes the DC level
Signal stabilization.As shown in figure 3, follower 220 includes operational amplifier Q2, the output end of operational amplifier Q2 connects anti-phase input
End is to constitute follower 220.
In the normal phase input end input of operational amplifier Q1 follows that treated DC level signal, such as Fig. 3, operation is put
The normal phase input end of big device Q1 connects the output end of operational amplifier Q2 by a resistance.The anti-phase input of operational amplifier Q1
Switching Power Supply current output voltage Vchg after end input partial pressure, realizes closed loop feedback.The output end of operational amplifier Q1 uses
The mode of negative-feedback is connect with inverting input terminal.The output end of operational amplifier Q1 is connect with the input terminal of optocoupler U2, with control
The working condition of optocoupler U2.
Optocoupler U2 by the operational amplifier Q1 signal exported for coupling and exporting to the feedback letter of Switching Power Supply 10
Number receiving end is exported to the feedback signal receiving end COMP of Switching Power Supply control chip U3.
As shown in Fig. 2, electrical level transferring chip U1 also has peripheral circuit, including first resistor R1, second in the present embodiment
Resistance R2,3rd resistor R3 and first capacitor C1.The output end of the input terminal connection charge controlling chip of electrical level transferring chip U1,
And pass through the first external power supply of first resistor R1 connection end VCC.The output end of electrical level transferring chip U1 is connected by second resistance R2
The second external power supply end VCC1 is met, one end of 3rd resistor R3 is also connected with.The other end of 3rd resistor R3 connects RC filter circuit
210 input terminal, and be grounded by first capacitor C1.Actually 3rd resistor R3 and first capacitor C1 also constitutes a RC filter
Wave circuit.
As shown in figure 3, RC filter circuit 210 includes the 4th resistance R4 and the second capacitor C2.One end of 4th resistance R4 is
The input terminal of RC filter circuit 210, the other end for connecting 3rd resistor R3.The other end of 4th resistance R4 connects operational amplifier
The normal phase input end of Q2, and be grounded by the second capacitor C2.
Charge control module 20 further includes the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, the 9th
Resistance R9, the tenth resistance R10, eleventh resistor R11, twelfth resistor R12, thirteenth resistor R13, third capacitor C3 and the 4th
Capacitor C4.The output end of operational amplifier Q2 passes through the normal phase input end of the 5th resistance R5 connection operational amplifier Q1, and operation is put
The inverting input terminal of big device Q1 connects one end of one end of the 6th resistance R6, the 7th resistance R7, and the other end of the 6th resistance R6 connects
Connect the output end of charge controlling chip, i.e. the voltage Vchg that currently exports of the other end input switch power supply of the 6th resistance R6.The
The other end of seven resistance R7 is grounded by the 8th resistance R8.The inverting input terminal of operational amplifier Q1 is also connected with the 9th resistance R9's
One end, by the output end of third capacitor C3 connection operational amplifier Q1, pass through the tenth resistance R10 connection operational amplifier Q1's
Output end.The other end of 9th resistance R9 passes through the output end of the 4th capacitor C4 connection operational amplifier Q1.Operational amplifier Q1
Output end also pass through one end of eleventh resistor R11 connection twelfth resistor R12 and the 2nd pin of optocoupler U2.12nd electricity
The 1st pin of the other end connection optocoupler U2 of R12 is hindered, and passes through the first external power supply of thirteenth resistor R13 connection end.Optocoupler U2
The 3rd pin connection switch power supply control chip U3 the end GND, the 4th pin connection switch power supply control chip U3 of optocoupler U2
The end COMP.In the present embodiment, the Switching Power Supply control chip U3 of Switching Power Supply 10 is UC2844 chip, UC2844 chip
The end COMP connect for the feedback signal receiving end of Switching Power Supply 10, with the output end of the charging control circuit.
In general, lithium battery charging has four-stage:
Stage 1: trickle charge --- trickle charge is used to first carry out preliminary filling to the battery unit to discharge completely (restorative to fill
Electricity).Use trickle charge when cell voltage is lower than 3V or so, trickle-charge current be constant-current charge electric current 1/10th i.e.
0.1c (being 1A citing with constant charge current, then trickle-charge current is 100mA).
Stage 2: constant-current charge --- when cell voltage rises to trickle charge threshold value or more, improves charging current and carry out
Constant-current charge.The electric current of constant-current charge is in 0.2C between 1.0C.Cell voltage is stepped up with constant-current charge process, generally
This voltage that single battery is set is 3.0-4.2V.
Stage 3: constant-voltage charge --- when cell voltage rises to 4.2V, constant-current charge terminates, and starts constant-voltage charge rank
Section.Electric current is according to the degree of saturation of battery core, as the continuation charging current of charging process is slowly reduced by maximum value, when being reduced to
When 0.01C, it is believed that charging termination.(C is with a kind of representation method of battery nominal capacity control electric current, if battery is 1000mAh
Capacity, 1C is exactly charging current 1000mA.)
Stage 4: charging termination.
The present embodiment is illustrated by taking the interim charging of lithium battery as an example.Charge controlling chip is according to current collection circuit
The current voltage of the battery that the current charging current of 30 batteries that sample, voltage collection circuit 40 sample, by preset rule
Charging voltage needed for battery or required charging current are then obtained, for example, judging cell voltage lower than if 3V if charge controlling chip
Battery needs to carry out trickle charge (constant-current charge), and defeated needed for obtaining Switching Power Supply according to the required charging current of trickle charge
Voltage out, the voltage of the required output are real-time changes, so that the charging current of battery is constant, charge controlling chip is defeated
Corresponding pwm signal out.Pwm signal is filtered and is followed using a RC, obtains one in A point (normal phase input end of amplifier Q1)
A level signal.Simultaneous Switching power supply current output voltage Vchg signal by way of electric resistance partial pressure, B point (amplifier Q1's
Inverting input terminal) also obtain a lower level signal.The electricity of output end is obtained by the negative-feedback circuit that amplifier Q1 is formed
Press the working condition of C, voltage C and the first external power supply VCC control optocoupler U2, further control switch power supply control chip U3
The feedback at the end COMP, the driving pwm signal of final control switch power supply control chip U3 are split powered-down by driving pwm signal
The switching tube in source 10 carries out PWM control, so that Switching Power Supply 10 exports the required voltage exported, battery 50 is made to can be carried out tiny stream
Current charge.Current collection circuit 30 and voltage collection circuit 40 carry out continuous collecting to electric current and voltage respectively, if cell voltage
Rise to trickle charge threshold value or more (such as cell voltage be higher than 3V), then carry out constant-current charge, process such as trickle charge,
Only charging current improves.Constant-voltage charge is carried out if cell voltage rises to 4.2V, charge controlling chip is filled according to constant pressure
The required charging voltage of electricity obtains the voltage (being substantially exactly the required charging voltage of constant-voltage charge) exported needed for Switching Power Supply,
Export corresponding pwm signal.Pwm signal is filtered and is followed using a RC, obtains a level signal in A point.It opens simultaneously
Powered-down source current output voltage Vchg signal also obtains a lower level signal by way of electric resistance partial pressure, in B point.It is logical
The negative-feedback circuit for crossing amplifier Q1 composition obtains the voltage C of output end, voltage C and the first external power supply VCC control optocoupler U2's
Working condition, the feedback at the end further control switch power supply control chip U3 COMP, final control switch power supply control chip U3
Driving pwm signal, PWM control is carried out to the switching tube of Switching Power Supply 10 by driving pwm signal, so that Switching Power Supply 10 is defeated
The required voltage exported out, makes battery 50 can be carried out constant-voltage charge.As it can be seen that the present invention adjusts feedback signal using MCU
Mode, realize multistage charging reduces while realizing battery charging management without expensive battery charging management chip
Cost.
Referring to Fig. 4, voltage collection circuit 40 includes the 14th resistance R14, the 15th resistance R15, the 16th resistance R16
With the 5th capacitor C5.One end of 14th resistance R14 connects anode, i.e. one end input battery electricity of the 14th resistance R14
Press BAT.The other end of 14th resistance R14 is grounded by the 15th resistance R15, and connects one end of the 16th resistance R16.The
The other end of 16 resistance R16 is the output end of voltage collection circuit 40, connects charge controlling chip.That is, voltage collection circuit
40 acquisition cell voltage BAT and convert thereof into charge controlling chip can received detection signal Vbat export and give charge control core
Piece.
Referring to Fig. 5, current collection circuit 30 includes the 17th resistance R17, the 18th resistance R18, the 19th resistance
R19, the 20th resistance R20, the 21st resistance R21, the 22nd resistance R22, the 23rd resistance R23, the 24th electricity
Hinder R24, the 25th resistance R25, the 26th resistance R26, the 27th resistance R27, the 28th resistance R28, the 20th
Nine resistance R29, the 30th resistance R30, the 31st resistance R31, the 6th capacitor C6, the 7th capacitor C7, the 8th capacitor C8, the 9th
Capacitor C9 and the tenth capacitor C10.One end of 17th resistance R17 is grounded, and the other end of the 17th resistance R17 passes through the 18th electricity
Hinder one end of the 19th resistance R19 of R18 connection, the normal phase input end of the other end connection amplifier Q4 of the 19th resistance R19.Second
The other end of one end connection battery of ten resistance R20 or the output end of Switching Power Supply, the 20th resistance R20 passes through the 21st electricity
Hinder one end of the 22nd resistance R22 of R21 connection, the inverting input terminal of the other end connection amplifier Q4 of the 22nd resistance R22.
The normal phase input end of amplifier Q4 is also grounded by the 23rd resistance R23, the 24th resistance R24 and the 6th capacitor C6 respectively.
The inverting input terminal of amplifier Q4 also passes through one end of the output end of the 7th capacitor C7 connection amplifier Q4, the 25th resistance R25.The
The other end of 25 resistance R25 connects one end of the 28th resistance R28, and passes through the 26th resistance R26, second respectively
The inverting input terminal of 17 resistance R27, the 8th capacitor C8 connection amplifier Q4.The other end of 28th resistance R28 connects amplifier
The normal phase input end of Q5, and be grounded by the 9th capacitor C9.The output end of amplifier Q5 passes through the 29th resistance R29 connection third
One end of ten resistance R30 and one end of the 31st resistance R31.The reverse phase of the other end connection amplifier Q5 of 30th resistance R30
Input terminal.The other end of 31st resistance R31 is the output end of current collection circuit 30, connects charge controlling chip, and lead to
Cross the tenth capacitor C10 ground connection.That is, charging current is obtained voltage signal by detecting resistance by current collection circuit 30, pass through
The voltage signal is amplified to the voltage signal that charge controlling chip easily identifies by differential amplifier circuit, follows (Q5) by level-one
Guarantee that voltage signal is more stable, reliable.
Use above specific case is illustrated the present invention, is merely used to help understand the present invention, not to limit
The system present invention.For those skilled in the art, according to the thought of the present invention, can also make several simple
It deduces, deform or replaces.
Claims (10)
1. a kind of charging control circuit of battery characterized by comprising
Voltage collection circuit, for acquiring the current voltage of battery；
Current collection circuit, for acquiring the current charging current of battery；
Charge control module, for determining needed for Switching Power Supply according to the current voltage of the battery and current charging current
The voltage of output, the voltage of the output according to needed for Switching Power Supply make Switching Power Supply come the received feedback signal of regulating switch power supply
Export the required voltage exported；The Switching Power Supply is for charging the battery.
2. charging control circuit as described in claim 1, which is characterized in that charge control module is according to the battery current
Voltage and current charging current, determine the voltage exported needed for Switching Power Supply, the voltage of the output according to needed for Switching Power Supply come
The received feedback signal of regulating switch power supply includes:
According to the current voltage of the battery and current charging current, charging voltage needed for battery or required charging electricity are obtained
Stream, the charging voltage according to needed for battery or required charging current obtain the voltage of output needed for Switching Power Supply；By Switching Power Supply institute
The voltage that need to be exported is converted into corresponding pwm signal, passes through the received feedback signal of pwm signal regulating switch power supply.
3. charging control circuit as described in claim 1, which is characterized in that the charge control module includes:
Charge controlling chip, for determining needed for Switching Power Supply according to the current voltage of the battery and current charging current
The voltage of output, and the voltage of output needed for Switching Power Supply is converted into corresponding pwm signal；
Electrical level transferring chip, for adjusting the amplitude of the pwm signal；
RC filter circuit, the pwm signal for exporting electrical level transferring chip are converted into DC level signal；
Optocoupler, for coupling and being exported to the feedback signal receiving end of Switching Power Supply by the DC level signal.
4. charging control circuit as claimed in claim 3, which is characterized in that the charge control module further include:
Follower, the DC level signal for exporting to the RC filter circuit follow；
Operational amplifier, the normal phase input end input of the operational amplifier follows that treated DC level signal, the fortune
The voltage that Switching Power Supply after calculating the inverting input terminal input partial pressure of amplifier currently exports, the output end of the operational amplifier
It is connect by the way of negative-feedback with the inverting input terminal；The input terminal of the output end of the operational amplifier and the optocoupler
Connection, to control the working condition of the optocoupler.
5. charging control circuit as claimed in claim 3, which is characterized in that the electrical level transferring chip is 74CT244PWR core
Piece, the charge controlling chip are STM32F103C8T6 chip.
6. a kind of charging circuit of battery, which is characterized in that including Switching Power Supply and such as any one of claim 1-5 institute
The charging control circuit stated；The output end of the charging control circuit is connect with the feedback signal receiving end of the Switching Power Supply.
7. charging circuit as claimed in claim 6, which is characterized in that the Switching Power Supply includes Switching Power Supply control chip,
For carrying out PWM control according to switching tube of the feedback signal to Switching Power Supply, the voltage stabilization for exporting Switching Power Supply exists
The corresponding voltage of the feedback signal.
8. charging circuit as claimed in claim 6, which is characterized in that the Switching Power Supply is inverse-excitation type switch power-supply.
9. charging circuit as claimed in claim 6, which is characterized in that the Switching Power Supply of the Switching Power Supply controls chip and is
UC2844 chip, the end COMP of the UC2844 chip are that the feedback signal receiving end of the Switching Power Supply and the charging are controlled
The output end of circuit processed connects.
10. a kind of charger, which is characterized in that including the charging circuit as described in any one of claim 6-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910552530.XA CN110289654B (en) | 2019-06-25 | 2019-06-25 | Charger and charging circuit and charging control circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910552530.XA CN110289654B (en) | 2019-06-25 | 2019-06-25 | Charger and charging circuit and charging control circuit thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110289654A true CN110289654A (en) | 2019-09-27 |
| CN110289654B CN110289654B (en) | 2021-06-04 |
Family
ID=68005633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910552530.XA Active CN110289654B (en) | 2019-06-25 | 2019-06-25 | Charger and charging circuit and charging control circuit thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110289654B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101431250A (en) * | 2007-11-06 | 2009-05-13 | 上海辰蕊微电子科技有限公司 | Charging management control circuit used for battery charger and its control method |
| CN104753158A (en) * | 2013-12-31 | 2015-07-01 | 广州市君盘实业有限公司 | SG3525 integrated chip-based single-chip microprocessor control technology charger |
| CN204835631U (en) * | 2015-08-12 | 2015-12-02 | 苏州汇川技术有限公司 | Digifax hybrid control storage battery charging circuit |
| CN107577181A (en) * | 2017-08-30 | 2018-01-12 | 苏州麦喆思科电子有限公司 | A kind of civil power household electricity control system using conjunction inside back cover pole pipe |
| CN207939403U (en) * | 2018-01-26 | 2018-10-02 | 广州视琨电子科技有限公司 | A kind of supply unit and intelligent lock device |
| CN108988412A (en) * | 2018-06-20 | 2018-12-11 | 国网江苏省电力有限公司泰州供电分公司 | A kind of accumulator charging and discharging control method |
-
2019
- 2019-06-25 CN CN201910552530.XA patent/CN110289654B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101431250A (en) * | 2007-11-06 | 2009-05-13 | 上海辰蕊微电子科技有限公司 | Charging management control circuit used for battery charger and its control method |
| CN104753158A (en) * | 2013-12-31 | 2015-07-01 | 广州市君盘实业有限公司 | SG3525 integrated chip-based single-chip microprocessor control technology charger |
| CN204835631U (en) * | 2015-08-12 | 2015-12-02 | 苏州汇川技术有限公司 | Digifax hybrid control storage battery charging circuit |
| CN107577181A (en) * | 2017-08-30 | 2018-01-12 | 苏州麦喆思科电子有限公司 | A kind of civil power household electricity control system using conjunction inside back cover pole pipe |
| CN207939403U (en) * | 2018-01-26 | 2018-10-02 | 广州视琨电子科技有限公司 | A kind of supply unit and intelligent lock device |
| CN108988412A (en) * | 2018-06-20 | 2018-12-11 | 国网江苏省电力有限公司泰州供电分公司 | A kind of accumulator charging and discharging control method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110289654B (en) | 2021-06-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210379328U (en) | Battery charging system | |
| CN209562207U (en) | A kind of robot hybrid power source system | |
| CN104155892B (en) | Circuit and method using the faint energy collection technology of single-chip I/O mouth | |
| CN204349496U (en) | Portable multi-voltage output mobile power supply | |
| CN2842844Y (en) | The digital power supply of portable photoelectricity | |
| CN206650467U (en) | A kind of management of charging and discharging circuit of lithium battery | |
| CN204615444U (en) | Panel computer | |
| CN204012830U (en) | Portable power source | |
| CN206559099U (en) | A kind of charge management circuit | |
| CN205583749U (en) | Intelligence goes up and down to press charging and discharging circuit | |
| CN205621816U (en) | Be provided with lithium ion secondary cell of USB interface | |
| CN208128137U (en) | interface control circuit and power supply system | |
| CN203481855U (en) | Portable power supply device | |
| CN202435059U (en) | Lithium cell charging and discharging management circuit | |
| CN104767243A (en) | Charging method, charging device, charging circuit and charging system with charging circuit | |
| CN110289654A (en) | A kind of charger and its charging circuit, charging control circuit | |
| CN103280850B (en) | Drive circuit with charger baby and multipurpose LED (light-emitting diode) functions | |
| CN206254814U (en) | SCM Based batteries of electric automobile intelligent charging system | |
| CN207677490U (en) | A kind of adaptive inductive charging mobile power | |
| CN205565772U (en) | Portable power source with charge management | |
| CN106410974A (en) | Two-stage energy storage system used for wireless sensor node | |
| CN208904890U (en) | A kind of superconducting magnet circuit | |
| CN208996983U (en) | Blowing device | |
| CN202905872U (en) | Electric energy collector for waste battery | |
| CN204615437U (en) | A kind of charging device and charging circuit and there is the charging system of this circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |