CN105656116A - Constant-current charging circuit adopting floating ground mode - Google Patents
Constant-current charging circuit adopting floating ground mode Download PDFInfo
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- CN105656116A CN105656116A CN201610030336.1A CN201610030336A CN105656116A CN 105656116 A CN105656116 A CN 105656116A CN 201610030336 A CN201610030336 A CN 201610030336A CN 105656116 A CN105656116 A CN 105656116A
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- floating ground
- input
- charging circuit
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- 238000007667 floating Methods 0.000 title claims abstract description 53
- 238000010277 constant-current charging Methods 0.000 title claims abstract description 21
- 238000004146 energy storage Methods 0.000 claims abstract description 9
- 238000005070 sampling Methods 0.000 claims description 12
- 238000004804 winding Methods 0.000 claims description 12
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000007600 charging Methods 0.000 abstract description 10
- 238000010586 diagram Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
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- H02J7/0026—
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00304—Overcurrent protection
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a constant-current charging circuit adopting floating ground mode. The constant-current charging circuit comprises an input anode, input ground, an output anode and floating ground which are connected with a battery set, a freewheeling energy storage module connected between the output anode and the floating ground, an inductance element and an electronic switch (Q1) successively and serially connected between the floating ground and the input ground, and a PWM control module controlling the on-off state of the electronic switch. According to the invention, the floating ground structure mode is utilized, and combined with a common topological circuit, constant-current charging circuit carries out constant-current charging on a plurality of serial batteries, the voltage range and the charging efficiency of the charging circuit are effectively improve, the practicality is high, and the controllability is good; when the output is short-circuited or overloaded, the circuit is totally in a zero load state, and the circuit is always in a most energy-saving state; in addition, by adopting the constant-current charging circuit, 2 to 32 batteries can be charged with a constant current, and when the number of the batteries changes, only the input voltage needs to be adjusted, so that the circuit is enabled to work at the optimal state.
Description
Technical field
The present invention relates to charging circuit, particularly relate to a kind of constant-current charging circuit adopting floating ground formula.
Background technology
Along with the development of electric power storage technology, the application in people's life and work of the multistage battery gets more and more. The charging of current accumulator adopts constant-current circuit to be charged mostly, and the operating voltage range of existing constant-current circuit is narrower, it is impossible to meet the requirement of Width funtion output. When battery number changes greatly, causing that battery pressure reduction changes greatly, charge efficiency can reduce.
Summary of the invention
The present invention is to solve the problems referred to above of prior art, it is proposed to a kind of constant-current charging circuit adopting floating ground formula.
For solving above-mentioned technical problem, the technical scheme that the present invention proposes is a kind of constant-current charging circuit adopting floating ground formula of design, comprising: the PWM connecting the input positive pole of DC source and input ground, the output cathode connecting set of cells and floating ground, the afterflow energy-storage module being connected between output cathode and floating ground, the inductance element being sequentially connected in series between floating and input ground and electrical switch, control electrical switch break-make controls module.
Charging circuit also includes: gathers described output cathode voltage and controls the voltage sample module of the surveyed output voltage of module feedback to PWM.
Concatenating current sampling module between described electrical switch with input ground, this current sampling module is controlled module by surveying output current feedback to described PWM.
Described afterflow energy-storage module includes: be connected in parallel on the 6th electric capacity between described input positive pole and described floating ground, the 7th electric capacity, forward are serially connected in the 3rd diode between inductance element and electrical switch junction point and described input positive pole.
Described PWM controls module and includes pwm chip and peripheral circuit thereof.
Described voltage sample module has comparator and three terminal regulator, the 7th resistance and the 8th resistance is concatenated between described input positive pole and floating ground, the contact of the 7th resistance and the 8th resistance connects the inverting input of comparator, the 12nd resistance is concatenated between described input positive pole and floating ground, 9th resistance and the tenth resistance, the contact of the 9th resistance and the tenth resistance connects the input in the same direction of comparator, the contact of the 12nd resistance and the 9th resistance connects the negative electrode of three terminal regulator and controls pole, the negative electrode of three terminal regulator connects floating ground, the inverting input of comparator connects the outfan of comparator by the 6th resistance connected and the 5th electric capacity, the outfan of comparator feeds back surveyed output voltage by the 5th resistance to pwm chip.
Described current sampling module includes: be serially connected in the 3rd resistance between described electrical switch and input ground, the contact of the 3rd resistance and electrical switch is surveyed output electric current by the 4th resistance to pwm chip feedback, and the grounding leg of pwm chip connects input ground.
Described inductance element adopts transformator, the primary side winding of described transformator be serially connected in described floatinglyly and between electrical switch, described 3rd diode forward is serially connected between primary side winding and electrical switch junction point and described input positive pole; Described transformer secondary winding one end connects described input ground, the other end controls module for power supply to described PWM.
The other end of described transformer secondary winding connects the anode of the second diode, the negative electrode of the second diode is powered to described pwm chip and connects negative electrode first resistance of the first Zener diode and one end of the second electric capacity, the other end of the first resistance connects described input positive pole, and the other end of the second electric capacity connects described input ground.
It is connected the first electric capacity between described input positive pole with input ground.
Compared with prior art, the present invention utilizes the frame mode on floating ground, in conjunction with common topological circuit, the battery of multiple series connection is carried out constant-current charge, is effectively improved voltage range and the charge efficiency of charging circuit, and practical controllability is good; The present invention has output short circuit protection and the sensitive advantage of overcurrent protection, when, after output short-circuit or overload, circuit is completely in Light Condition, makes circuit be in the most energy-conservation state all the time; Adopt the present invention can realize the charging to 2 joints to 32 batteries constant currents, when number of batteries changes, as long as adjusting the voltage of input, in order to the optimum state that circuit works in.
Accompanying drawing explanation
Fig. 1 is the theory diagram of present pre-ferred embodiments;
Fig. 2 is the circuit diagram of present pre-ferred embodiments.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is described in further detail. Should be appreciated that specific embodiment described herein is used only for explaining the present invention, be not intended to limit the present invention.
Referring to the theory diagram shown in Fig. 1, floating ground formula constant-current charging circuit that the present invention discloses is comprising: connect the input positive pole of DC source and input ground, the output cathode connecting set of cells and floating ground, the afterflow energy-storage module being connected between output cathode and floating ground, the inductance element being sequentially connected in series between floating and input ground and electrical switch Q1, control the PWM control module of electrical switch break-make.
The present invention utilizes the frame mode on floating ground, in conjunction with common topological circuit, improve the scope of battery operating voltage, and the processing mode on floating ground is very ingenious, the energy storage utilizing electric capacity realizes floating ground, the benchmark of circuit is to determine with the positive pole of input power, and the height of voltage determines the current potential on floating ground, it may also be said to be operated in the way of negative pressure; Owing to being with positive polarity for benchmark, so current sampling can only be sampled at the positive pole of power supply, doing current sampling with an independent comparator, equally possible accomplishing precisely, improves efficiency. Plus output protection circuit, make two part circuit perfect adaptations, thus improve the reliability of circuit.
Circuit diagram referring to the preferred embodiment shown in Fig. 2, main circuit carries out PWM with pwm chip U1 and produces switching signal and Isobarically Control, 4 feet of U1 and 8 feet composition PWM drive, by the conducting of Q1 and cut-off, input energy is transferred to rear class by T1, and by the isolation of Q1, making output earth potential different from input earth potential, output ground becomes floating ground.Floating ground pressure reduction is relevant to the conducting degree of Q1. Q1, R3 constitute pressure limiting circuit, allow T1 carry out inputting and exporting the conversion of energy by the break-make of Q1, and R3 limits maximum output electric current.
In the preferred embodiment, charging circuit also includes: gathers described output cathode voltage and controls the voltage sample module of the surveyed output voltage of module feedback to PWM. Concatenating current sampling module between described electrical switch with input ground, this current sampling module is controlled module by surveying output current feedback to described PWM.
Referring to the circuit diagram of the preferred embodiment shown in Fig. 2, described afterflow energy-storage module includes: be connected in parallel on the 6th electric capacity C6 between described input positive pole and described floating ground, the 7th electric capacity C7, forward are serially connected in the 3rd diode D3 between inductance element and electrical switch Q1 junction point and described input positive pole. C6, C7, D3 form the afterflow power supply circuits of afterflow energy storage, filtering. The main work function of C6 and C7 is will to eliminate because of topological circuit produced dynamic effect when on off state, make to be in floating stable duty.
Described PWM controls module and includes pwm chip U1 and peripheral circuit thereof.
Circuit diagram referring to the preferred embodiment shown in Fig. 2, described voltage sample module has comparator (U2A) and three terminal regulator U3, the 7th resistance R7 and the eight resistance R8 is concatenated between described input positive pole and floating ground, the contact of the 7th resistance and the 8th resistance connects the inverting input of comparator, the 12nd resistance R12 is concatenated between described input positive pole and floating ground, 9th resistance R9 and the ten resistance R10, the contact of the 9th resistance and the tenth resistance connects the input in the same direction of comparator, the contact of the 12nd resistance and the 9th resistance connects the negative electrode of three terminal regulator and controls pole, the anode of three terminal regulator connects floating ground, the inverting input of comparator connects the outfan of comparator by the 6th resistance R6 and the five electric capacity C5 connected, the outfan of comparator feeds back surveyed output voltage by the 5th resistance R5 to pwm chip U1. owing to this charging circuit is with just extremely benchmark, so sample circuit is necessarily at positive pole, when input voltage height, meeting rising simultaneously floatingly, because be a variable floatingly, it can change along with the change of input voltage. in order to realize the constant of output voltage, it is that circuit provides a constant datum mark by R12, U3, R9, R10, and the voltage sampling signal after R7 and R8 dividing potential drop and datum mark carry out voltage ratio relatively, the FB voltage of pwm chip U1 is regulated by U2A comparator, thus adjusting the pulsewidth of Q1, thus reaching the purpose of output constant voltage.
Circuit diagram referring to the preferred embodiment shown in Fig. 2, described current sampling module includes: be serially connected in the 3rd resistance R3 between described electrical switch Q1 and input ground, the contact of the 3rd resistance and electrical switch is surveyed output electric current by the 4th resistance R4 to pwm chip U1 feedback, and the grounding leg of pwm chip connects input ground. R3 is current-limiting resistance, by Q1 with being serially connected in input and between floating ground, when Q1 turns on, export because when battery charges, load strengthens, electric current now by Q1 and R3 strengthens, and can produce pressure reduction at R3 two ends, and this pressure reduction is transferred to the CS foot of U1 by R4 and C3, the pulsewidth of Q1 is regulated, thus reaching the purpose of output constant current by the height of CS current potential. When R3 flows through at electric current excessive, when causing potential difference on R3 to protect voltage higher than the U1 CS set, U1 closes 4 foot GATA waveforms outputs, with making input and completely isolated between floating ground, and power supply overcurrent protection.The size of overcurrent protection electricity depends on the size of R3 resistance.
Described inductance element adopts transformator T1, the primary side winding of described transformator be serially connected in described floatinglyly and between electrical switch Q1, described 3rd diode (D3) forward is serially connected between primary side winding and electrical switch (Q1) junction point and described input positive pole; Described transformer secondary winding one end connects described input ground, the other end controls module for power supply to described PWM. The other end of described transformator T1 vice-side winding connects the anode of the second diode D2, the negative electrode of the second diode is powered to described pwm chip U1 and connects one end of negative electrode the first resistance R1 and the second electric capacity C2 of the first Zener diode ZD1, the other end of the first resistance connects described input positive pole, and the other end of the second electric capacity connects described input ground. It is connected the first electric capacity C1 between described input positive pole with input ground. Input dc power can be filtered by C1. When output short-circuit, transformator T1 is in short-circuit condition for a long time, and U1 is because can not get the feedback of T1, it does not have power supply is for U1 normal operation, so Q1 can be constantly in cut-off state, with causing input and completely isolated between floating ground, power supply input is in Light Condition. When output short-circuit eliminates, U1 restarts, and controls Q1 by PWM switch drive, make to float with input produce pressure reduction, thus maintaining the constant voltage output of output.
Referring to Fig. 2, input positive pole also concatenates electric fuse F1, and charging circuit is shielded.
Above example by way of example only, non-provides constraints. Any without departing from the application spirit and category, and to its equivalent modifications carried out or change, be intended to be limited solely by among claims hereof scope.
Claims (10)
1. the constant-current charging circuit adopting floating ground formula, it is characterized in that, including: connect the input positive pole of DC source and input ground, the output cathode connecting set of cells and floating ground, the afterflow energy-storage module being connected between output cathode and floating ground, the inductance element being sequentially connected in series between floating and input ground and electrical switch (Q1), the PWM that controls electrical switch break-make control module.
2. the constant-current charging circuit adopting floating ground formula as claimed in claim 1, it is characterised in that also include: gather described output cathode voltage and control the voltage sample module of the surveyed output voltage of module feedback to PWM.
3. the constant-current charging circuit adopting floating ground formula as claimed in claim 2, it is characterised in that concatenate current sampling module between described electrical switch with input ground, this current sampling module is controlled module by surveying output current feedback to described PWM.
4. the constant-current charging circuit adopting floating ground formula as claimed in claim 3, it is characterized in that, described afterflow energy-storage module includes: be connected in parallel on the 6th electric capacity (C6) between described input positive pole and described floating ground, the 3rd diode (D3) that the 7th electric capacity (C7), forward are serially connected between inductance element and electrical switch (Q1) junction point and described input positive pole.
5. the constant-current charging circuit adopting floating ground formula as claimed in claim 4, it is characterised in that described PWM controls module and includes pwm chip (U1) and peripheral circuit thereof.
6. the constant-current charging circuit adopting floating ground formula as claimed in claim 5, it is characterized in that, described voltage sample module has comparator (U2A) and three terminal regulator (U3), the 7th resistance (R7) and the 8th resistance (R8) is concatenated between described input positive pole and floating ground, the contact of the 7th resistance and the 8th resistance connects the inverting input of comparator, the 12nd resistance (R12) is concatenated between described input positive pole and floating ground, 9th resistance (R9) and the tenth resistance (R10), the contact of the 9th resistance and the tenth resistance connects the input in the same direction of comparator, the contact of the 12nd resistance and the 9th resistance connects the negative electrode of three terminal regulator and controls pole, the negative electrode of three terminal regulator connects floating ground, the inverting input of comparator connects the outfan of comparator by the 6th resistance (R6) connected and the 5th electric capacity (C5), the outfan of comparator feeds back surveyed output voltage by the 5th resistance (R5) to pwm chip (U1).
7. the constant-current charging circuit adopting floating ground formula as claimed in claim 6, it is characterized in that, described current sampling module includes: be serially connected in the 3rd resistance (R3) between described electrical switch (Q1) and input ground, the contact of the 3rd resistance and electrical switch is surveyed output electric current by the 4th resistance (R4) to pwm chip (U1) feedback, and the grounding leg of pwm chip connects input ground.
8. the constant-current charging circuit adopting floating ground formula as claimed in claim 7, it is characterized in that, described inductance element adopts transformator (T1), the primary side winding of described transformator be serially connected in described floatinglyly and between electrical switch (Q1), described 3rd diode (D3) forward is serially connected between primary side winding and electrical switch (Q1) junction point and described input positive pole; Described transformer secondary winding one end connects described input ground, the other end controls module for power supply to described PWM.
9. the constant-current charging circuit adopting floating ground formula as claimed in claim 8, it is characterized in that, the other end of described transformator (T1) vice-side winding connects the anode of the second diode (D2), the negative electrode of the second diode is to described pwm chip (U1) power supply and connects the negative electrode the first resistance (R1) of the first Zener diode (ZD1) and one end of the second electric capacity (C2), the other end of the first resistance connects described input positive pole, and the other end of the second electric capacity connects described input ground.
10. the constant-current charging circuit adopting floating ground formula as claimed in claim 9, it is characterised in that be connected the first electric capacity (C1) between described input positive pole with input ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610030336.1A CN105656116B (en) | 2016-01-18 | 2016-01-18 | A kind of constant-current charging circuit using floating ground formula |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610030336.1A CN105656116B (en) | 2016-01-18 | 2016-01-18 | A kind of constant-current charging circuit using floating ground formula |
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| CN105656116A true CN105656116A (en) | 2016-06-08 |
| CN105656116B CN105656116B (en) | 2018-11-30 |
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| CN201610030336.1A Active CN105656116B (en) | 2016-01-18 | 2016-01-18 | A kind of constant-current charging circuit using floating ground formula |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109599911A (en) * | 2018-11-12 | 2019-04-09 | 苏州华启智能科技有限公司 | A kind of quick charge backup power source of the adjustable output of pressure stabilizing |
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| JP2008099505A (en) * | 2006-10-16 | 2008-04-24 | Matsushita Electric Ind Co Ltd | Inverter for air conditioner |
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| CN109599911A (en) * | 2018-11-12 | 2019-04-09 | 苏州华启智能科技有限公司 | A kind of quick charge backup power source of the adjustable output of pressure stabilizing |
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| CN105656116B (en) | 2018-11-30 |
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Address after: 518000 New Lake Street, Guangming New District, Shenzhen City, Guangdong Province Applicant after: SHENZHEN FRECOM ELECTRONICS CO., LTD. Address before: 518000 Shenzhen Guangming New District, Guangdong Province, Fuchuan rich science and Technology Park Applicant before: SHENZHEN FRECOM ELECTRONICS CO., LTD. |
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Effective date of registration: 20220105 Address after: 423400 floors 1-3, building 7, Jiangbei Industrial Park Innovation and entrepreneurship base (dream pursuit Park), Zixing Economic Development Zone, Chenzhou City, Hunan Province Patentee after: Chenzhou furuikang Electronic Co.,Ltd. Address before: 518000 New Lake Street, Guangming New District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN FRECOM ELECTRONICS Co.,Ltd. |