CN203827043U - Heavy-current constant-current charging circuit - Google Patents
Heavy-current constant-current charging circuit Download PDFInfo
- Publication number
- CN203827043U CN203827043U CN201420135243.1U CN201420135243U CN203827043U CN 203827043 U CN203827043 U CN 203827043U CN 201420135243 U CN201420135243 U CN 201420135243U CN 203827043 U CN203827043 U CN 203827043U
- Authority
- CN
- China
- Prior art keywords
- circuit module
- switching tube
- current
- triode
- control circuit
- 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.)
- Expired - Lifetime
Links
- 238000010277 constant-current charging Methods 0.000 title claims abstract description 17
- 238000007600 charging Methods 0.000 claims abstract description 7
- 239000003990 capacitor Substances 0.000 claims description 12
- 230000000087 stabilizing effect Effects 0.000 claims description 5
- 238000005070 sampling Methods 0.000 abstract description 4
- 230000002093 peripheral effect Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Abstract
The utility model provides a heavy-current constant-current charging circuit including a control circuit module, a sampling circuit module and a switching tube output circuit module, and further including a switching tube driving module connected between the control circuit module and the switching tube output circuit module. The switching tube driving module includes a triode (Q6) and a triode (Q8). A sampling signal generated by the sampling circuit module is input into the control circuit module. The control circuit module generates a PWM signal which, after amplified by the switching tube driving module, is output to control the switching tube output circuit module to output corresponding current, and thus closed loop charging control is realized. Therefore, the magnitude of the output current is controlled, a battery is effectively protected. The heavy-current constant-current charging unit realizes a high-efficiency heavy-current constant-current function with only one MOS transistor and a plurality of resistance-capacitance sensing peripheral devices, and has higher efficiency than a conventional scheme of a switching power supply + constant current. The heavy-current constant-current charging circuit has the efficiency which is improved to above 95% from 90%, helps to reduce cost and the PCB area and decrease the size of the product, and is more energy-saving and environmentally friendly.
Description
Technical field
The utility model relates to a kind of high efficiency large electric current constant-current charging circuit.
Background technology
Lithium ion battery is green rechargeable battery of new generation, have that voltage is high, volume is little, the outstanding advantages such as good cycle and memory-less effect, but it requires harsher to charge condition, require to charge at electric current and the voltage of prescribed level, otherwise can affect battery life, the security incident such as even explosion caused.Traditional scheme is to adopt Switching Power Supply to add that constant-current circuit is lithium ion cell charging, but sort circuit power volume is large, and efficiency is low, and cost is high, and poor reliability need to be developed a kind of constant current charge current limiting technique product of high-efficiency and low-cost.
Utility model content
In view of this, the technical problems to be solved in the utility model is to provide a kind of high efficiency, large electric current constant-current charging circuit cheaply.
For solving the problems of the technologies described above, the technical scheme that the utility model provides is: a kind of large electric current constant-current charging circuit, comprise control circuit module, sample circuit module and switching tube output circuit module, also comprise the switching tube driver module being connected between control circuit module and switching tube output circuit module, the sampled signal input control circuit module that described sample circuit module produces, control circuit module is exported corresponding electric current by generation pwm signal output control switch pipe output circuit module after switching tube driver module amplifies and is realized closed loop charging control.
Described switching tube output circuit module comprises switching tube Q1, described switching tube Q1 source electrode is connected with the both positive and negative polarity of drain electrode respectively with one diode D1, the drain electrode of described switching tube Q1 is connected with capacitor C 4～C6 in parallel after connecting an inductance L 1, when switching tube Q1 conducting, working power is charged to inductance L 1 and capacitor C 5, when switching tube Q1 cut-off, inductance L 1 and capacitor C 5 are by the continuity of diode D3 parallel with one another and D2 sustain discharge electric current.
Described switching tube driver module comprises triode Q6 and triode Q8, described triode Q6 and triode Q8 pass through emitter and base stage interconnects, the connected one end of its base stage is connected in control circuit module by a resistance R 26, the connected one end of its emitter is connected to the grid of switching tube Q1 by a resistance R 5, the collector electrode of described triode Q6 connects power supply, between the collector electrode of described triode Q8 and emitter, be connected a voltage stabilizing didoe Z4, and triode Q8 collector terminal is connected with switching tube Q1 source electrode.
Described sample circuit module produces sampled signal input control circuit module by a resistance R 1.
Described inductance L 1 is connected to negative output terminal by a fuse F1.
Compared with prior art, the utlity model has following advantage:
The utility model provides a kind of large electric current constant-current charging circuit, produce pwm signal and after switching tube driver module amplifies, adjust the conducting duty ratio of switching tube by control circuit module, thereby control output current size, exceed set point and just enter constant current current-limit mode, reach the size of controlling charging current, effectively protect battery, this circuit utilizes control circuit module to produce the conducting duty ratio of pwm signal adjustment switching tube, only need a metal-oxide-semiconductor and several capacitance-resistance sense peripheral components can realize the large electric current constant current function of high efficiency, compared with traditional switch power supply+constant current scheme, efficiency is higher, efficiency rises to more than 95% from 90%, save transformer, power supply IC, rectifier bridge etc., reduce cost, reduce PCB area, make product less, more energy-conserving and environment-protective efficiency is high, practical and safe and reliable.
Brief description of the drawings
Fig. 1 is the overall structure schematic diagram of the large electric current constant-current charging circuit of the utility model high efficiency.
Embodiment
For the ease of it will be appreciated by those skilled in the art that below in conjunction with accompanying drawing and embodiment, the utility model is explained in further detail.
Embodiment
As shown in Figure 1, a kind of large electric current constant-current charging circuit, comprise control circuit module, sample circuit module and switching tube output circuit module, also comprise the switching tube driver module being connected between control circuit module and switching tube output circuit module, the sampled signal input control module that described sample circuit module produces, control module is carried out closed-loop control by producing pwm signal by the duty ratio of switching tube driver module control switch pipe output circuit module.
In parallel with capacitor C 3 after capacitor C 1 and C2 series connection, one end connecting circuit B+ end after its parallel connection, the GND-1 end that is connected in the PWM generation chip in control module after other end contact resistance R1, is connected with the source electrode of the switching tube Q1 in switching tube output circuit module simultaneously.
The source electrode of switching tube Q1 and drain electrode parallel diode D1, the source electrode of switching tube Q1 and grid parallel resistance R12, the grid of switching tube Q1 is connected with the emitter of triode Q6 and triode Q8 by resistance R 5 simultaneously, emitter and the base stage of triode Q6 and triode Q8 interconnect respectively, the emitter link of triode Q6 and triode Q8 is connected with the negative terminal of voltage stabilizing didoe Z4, the anode of voltage stabilizing didoe Z4 is connected in the collector electrode of triode Q8 and the source electrode of switching tube Q1 simultaneously, the base stage link of triode Q6 and triode Q8 is connected the DRI end that produces chip with PWM by resistance R 26, after connecting power supply simultaneously and be connected capacitor C 27, the collector electrode of triode Q6 is connected with the GND-1 end of PWM generation chip.
Diode D3 and D2 parallel with one another after with the resistance R 1 of connecting, R2 parallel connection, the B+ end of its negative terminal connecting circuit, the anode drain electrode of connecting valve pipe Q1 simultaneously and one end of inductance L 1, in parallel with capacitor C 5 after capacitor C 4 and C6 series connection, its one end connecting circuit B+ end, is connected to negative output terminal after connecting analog ground end AGND and connection fuse F1 when the other end is connected with the other end of inductance L 1.
As shown in Figure 1, charging current enters sample circuit module from C-end, after sample circuit module produces sampled signal input control circuit module generation pwm signal by resistance R 1, output mos drives signal DRI, and MOS drives signal DRI to amplify rear control switch pipe Q1 work by triode Q6 and triode Q8
Concrete, triode Q6 and triode Q8 pass through emitter and base stage interconnects, after described triode Q6 interconnects with triode Q8 base stage, be connected control circuit module by a resistance R 26 and receive MOS driving signal DRI, after described triode Q6 interconnects with triode Q8 emitter, be connected and drive signal DRI to be sent to the grid of switching tube Q1 the MOS after amplifying by a resistance R 5, the collector electrode of described triode Q6 connects power supply, between the collector electrode of described triode Q8 and emitter, be connected a voltage stabilizing didoe Z4, and triode Q8 collector terminal is connected with switching tube Q1 source electrode.
Described switching tube Q1 source electrode is connected with the both positive and negative polarity of drain electrode respectively with one diode D1, the drain electrode of described switching tube Q1 is connected with capacitor C 4～C6 in parallel after connecting an inductance L 1, when switching tube Q1 conducting, working power is charged to inductance L 1 and capacitor C 5, when switching tube Q1 cut-off, inductance L 1 and capacitor C 5 are by the continuity of diode D3 parallel with one another and D2 sustain discharge electric current.
Described inductance L 1 is connected to negative output terminal by a fuse F1.
In circuit, I is output current set point, and V is feedback voltage, and R is sampling resistor value, according to V=I*R, as long as change the resistance R of R1, just can adjust the size of output current, and all right multi-channel parallel is realized the output of larger electric current.
The utility model provides a kind of large electric current constant-current charging circuit, produce pwm signal and after switching tube driver module amplifies, adjust the conducting duty ratio of switching tube by control circuit module, thereby control output current size, exceed set point and just enter constant current current-limit mode, reach the size of controlling charging current, effectively protect battery, this circuit utilizes control circuit module to produce the conducting duty ratio of pwm signal adjustment switching tube, only need a metal-oxide-semiconductor and several capacitance-resistance sense peripheral components can realize the large electric current constant current function of high efficiency, compared with traditional switch power supply+constant current scheme, efficiency is higher, efficiency rises to more than 95% from 90%, save transformer, power supply IC, rectifier bridge etc., reduce cost, reduce PCB area, make product less, more energy-conserving and environment-protective efficiency is high, practical and safe and reliable.
Be more than wherein specific implementation of the present utility model, it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these apparent replacement forms all belong to protection range of the present utility model.
Claims (5)
1. a large electric current constant-current charging circuit, comprise control circuit module, sample circuit module and switching tube output circuit module, it is characterized in that: also comprise the switching tube driver module being connected between control circuit module and switching tube output circuit module, the sampled signal input control circuit module that described sample circuit module produces, control circuit module is exported corresponding electric current by generation pwm signal output control switch pipe output circuit module after switching tube driver module amplifies and is realized closed loop charging control.
2. a kind of large electric current constant-current charging circuit according to claim 1, it is characterized in that: described switching tube output circuit module comprises switching tube Q1, described switching tube Q1 source electrode is connected with the both positive and negative polarity of drain electrode respectively with one diode D1, and the drain electrode of described switching tube Q1 is connected with capacitor C 4～C6 in parallel after connecting an inductance L 1.
3. a kind of large electric current constant-current charging circuit according to claim 2, it is characterized in that: described switching tube driver module comprises triode Q6 and triode Q8, described triode Q6 and triode Q8 pass through emitter and base stage interconnects, the connected one end of its base stage is connected in control circuit module by a resistance R 26, the connected one end of its emitter is connected to the grid of switching tube Q1 by a resistance R 5, the collector electrode of described triode Q6 connects power supply, between the collector electrode of described triode Q8 and emitter, be connected a voltage stabilizing didoe Z4, and triode Q8 collector terminal is connected with switching tube Q1 source electrode.
4. a kind of large electric current constant-current charging circuit according to claim 3, is characterized in that: described sample circuit module produces sampled signal input control circuit module by a resistance R 1.
5. a kind of large electric current constant-current charging circuit according to claim 4, is characterized in that: described inductance L 1 is connected to negative output terminal by a fuse F1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420135243.1U CN203827043U (en) | 2014-03-25 | 2014-03-25 | Heavy-current constant-current charging circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420135243.1U CN203827043U (en) | 2014-03-25 | 2014-03-25 | Heavy-current constant-current charging circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203827043U true CN203827043U (en) | 2014-09-10 |
Family
ID=51482504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420135243.1U Expired - Lifetime CN203827043U (en) | 2014-03-25 | 2014-03-25 | Heavy-current constant-current charging circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203827043U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110350631A (en) * | 2019-08-07 | 2019-10-18 | 浙江中智海通信科技有限公司 | Battery charging and discharging disconnect switch circuit and its application |
-
2014
- 2014-03-25 CN CN201420135243.1U patent/CN203827043U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110350631A (en) * | 2019-08-07 | 2019-10-18 | 浙江中智海通信科技有限公司 | Battery charging and discharging disconnect switch circuit and its application |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202364112U (en) | Starting circuit of control chip of switching-mode power supply | |
| CN102904329B (en) | Electric power management circuit | |
| CN201230282Y (en) | Auxiliary electric source actuating apparatus for solar photovoltaic combining inverter | |
| CN201774245U (en) | PFC overcurrent protecting circuit | |
| CN102469655A (en) | Light-emitting diode (LED) driving circuit | |
| CN206743106U (en) | A kind of LED emergency power supplies output constant power circuit | |
| CN202931003U (en) | Battery charging circuit and power supply circuit | |
| CN203827043U (en) | Heavy-current constant-current charging circuit | |
| CN204652731U (en) | A kind of LED power with short-circuit protection | |
| CN104185345A (en) | Control device used for LED constant-current driving circuit | |
| CN106026338A (en) | Power supply circuit capable of realizing dormant state of solar controller | |
| CN202797873U (en) | Light-emitting diode (LED) short-circuit protection circuit | |
| CN102801296B (en) | Switching power supply output peak eliminating circuit | |
| CN107969052A (en) | A kind of High Power Factor low-voltage no-stroboflash LED linear drive circuit | |
| CN202958028U (en) | Actuating circuit of solar LED (light-emitting diode) lamp string | |
| CN204271621U (en) | A kind of reversal connection of battery recharger port and short-circuit protection | |
| CN203618180U (en) | LED driving apparatus | |
| CN206947934U (en) | A kind of short-circuit protection circuit and BOOST circuit | |
| CN203340358U (en) | Solar energy powered LED constant-current driving power with controllable voltage | |
| CN203135502U (en) | Portable solar mobile power supply | |
| CN106211479B (en) | A kind of intelligent protection circuit for buffering transient high-current | |
| CN206196098U (en) | Constant current led drive circuit | |
| CN206061217U (en) | The intelligent protection circuit of buffering transient high-current | |
| CN204145002U (en) | A kind of simple and easy polycrystalline silicon solar controller | |
| CN202014215U (en) | Solar controller circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140910 |