CN204652015U - A kind of charging circuit of LC resonance high energy conversion - Google Patents
A kind of charging circuit of LC resonance high energy conversion Download PDFInfo
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- CN204652015U CN204652015U CN201520353430.1U CN201520353430U CN204652015U CN 204652015 U CN204652015 U CN 204652015U CN 201520353430 U CN201520353430 U CN 201520353430U CN 204652015 U CN204652015 U CN 204652015U
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Abstract
The utility model discloses the charging circuit of a kind of LC resonance high energy conversion, comprising: battery pack, boosting voltage transformation unit, downconverter unit.MCU control unit, isolation voltage transformation unit, voltage collection circuit, current detection circuit, MCU power supply unit.220V alternating current connects the voltage input end of boosting voltage transformation unit, and the voltage output end of downconverter unit connects the corresponding both positive and negative polarity of battery, and isolation variable-voltage power supply is connected between boosting voltage transformation unit and downconverter unit and forms each self-loop; MCU control unit connects isolation voltage transformation unit, current detection circuit, voltage collection circuit, MCU power supply unit respectively.Advantage is the charge mode utilizing pwm control signal to reach not only quick but also safe.Change according to temperature can make safe change to circuit by the duty ratio of pwm signal at any time in time.Setting charging interval the longest protection, ensures the saturated rear timely disconnection of battery.
Description
Technical field
The utility model relates to a kind of charging circuit, particularly relates to the charging circuit of a kind of LC resonance high energy conversion.
Background technology
In prior art, traditional three stage charging system is more two-period form charging by a lot of manufacturer, and namely periods of low pressure is with constant current charge, transfers constant voltage charge to after reaching high pressure.Such shortcoming will soon make battery liquid tail off exactly, and it is dense that inside is mixed, and leakage current becomes large, power loss becomes the various problems such as large.Under charger does not have over-charge protective, once battery is full of and does not disconnect charging for a long time afterwards, charger power loss can produce heat energy equally and damage battery.If need staff to go to disconnect, obviously intelligent not.When charging, fever phenomenon is also the phenomenon that must have, and the control at present for temperature is done much fine, can not make adjustment in time, have certain risk to exist according to the change of temperature to charging circuit.
Utility model content
This utility model object is to provide a kind of charging circuit overcoming the problems referred to above, utilizes LC harmonic conversion to reach high energy and changes and utilize pwm control signal to reach and namely have safe charge mode fast.
The charging circuit of a kind of LC resonance high energy conversion described in the utility model, comprising: battery pack; Boosting voltage transformation unit, for converting 220V alternating current to High voltage output, reduces energy consumption; Downconverter unit, for converting above-mentioned High voltage output to chargeable voltage.Also comprise: MCU control unit, for adjusting pwm control signal duty ratio in real time according to each input signal; Isolation voltage transformation unit, for the pwm control signal adjustment charging voltage according to input; Voltage collection circuit, for gathering the voltage signal of charging circuit; Current detection circuit, for detecting the current signal of charging circuit; MCU power supply unit, for powering to MCU control unit.220V alternating current connects the voltage input end of boosting voltage transformation unit, and the voltage output end of downconverter unit connects the corresponding both positive and negative polarity of battery, and isolation variable-voltage power supply is connected between boosting voltage transformation unit and downconverter unit and forms each self-loop; The PWM control output end of MCU control unit connects the PWM control input end of isolation voltage transformation unit, the current signal input of MCU control unit is connected in series current detection circuit with between battery cathode, the voltage signal inputs of MCU control unit is connected in series voltage collection circuit with between anode, the voltage input end of MCU control unit be connected in series MCU power supply unit between battery anode.
Described charging circuit, also comprises: temperature sensor, for detecting the temperature of whole charging circuit.The warming signal output part of described temperature sensor connects the warming signal input part of MCU control unit.
Described charging circuit, temperature sensor adopts thermistor (temperature) sensor.
Described charging circuit, also comprises: LED light, for showing charged state.Described LED light connects the cresset output of MCU control unit.
Described charging circuit, also comprises: fan, for reducing charging circuit temperature.Described fan connects the cooling signal output of MCU control unit.
Described charging circuit, also comprises: switching circuit, for preventing battery pack reversal connection, and protection battery pack.Described switching circuit is serially connected with between battery electrode and downconverter unit.
The utility model advantage is that utilizing LC harmonic conversion to reach high energy changes and utilize the charge mode that pwm control signal reaches not only quick but also safe.The display of LED frequency intuitively can show charged state to user, and the change according to temperature can make safe change to circuit by the duty ratio of pwm signal at any time in time.Setting charging interval the longest protection, ensures the saturated rear timely disconnection of battery.
Accompanying drawing explanation
Fig. 1 is structure principle chart of the present utility model.
Fig. 2 is voltage collection circuit figure of the present utility model.
Fig. 3 is current detection circuit figure of the present utility model.
Fig. 4 is switching circuit figure of the present utility model.
Fig. 5 is MCU power supply unit circuit diagram of the present utility model.
Embodiment
According to Fig. 1, provide preferred forms: after boosting voltage transformation unit connects 220V alternating current, become 310V high pressure by LC harmonic conversion, isolation voltage transformation unit adjusts the output voltage of downconverter unit by PWM duty ratio between boosting voltage transformation unit and downconverter unit, output voltage transfer process by constant current low pressure to high pressure constant voltage again to float charge voltage.Above-mentioned three voltage transformation unit form main power source part, have employed high energy conversion LC harmonic technology.Output have employed the advanced synchronous rectification in the whole world, and total transfer ratio can up to more than 97% ~ 98%, and last use reaches good power saving effect.
The main control chip of MCU control unit adopts model STM8S003, and MCU control unit can pass through voltage collection circuit, current detection circuit, and various current/voltage temperature signal collected by temperature sensor.The situation of the whole charging circuit of real-time monitoring.As shown in Figure 2, voltage collection circuit is made up of resistance R1, R2, R3, R4 and electric capacity C1.Resistance R1, R2 and R3 contact ground connection after battery anode successively.The common point of resistance R2, R3 is successively by ground connection after resistance R4 electric capacity C1, and the voltage signal output end that resistance R4 and electric capacity C1 tie point are voltage collection circuit is connected the voltage signal inputs of MCU control unit.Voltage collection circuit accesses in battery pack can detect target battery group voltage whether adaptive charging circuit a moment.In the course of the work, monitoring charging voltage higher than 49V, can not extend battery life always.
As shown in Figure 3, current detection circuit is made up of resistance R5 and electric capacity C2.By electric capacity C2 ground connection after battery electrode contact resistance R5, resistance R5 and the tie point of electric capacity C2 are the current signal input that current signal output end is connected MCU control unit.
As shown in Figure 4, switching circuit is made up of switching tube Q1, triode Q2 and resistance R6, R7, R8.The opening and closing of whole charging circuit of the conducting of switching tube Q1 and closing control.The conducting state of switching tube Q1 is controlled by triode Q2 collector electrode, and the base stage of triode Q2 connects MCU control unit.Switching circuit mainly protects the reversal connection of battery pack to disconnect, and after battery pack reversal connection, switching tube Q1 is not by electric current, and whole charging circuit disconnects, and reaches the effect of protection battery pack.
MCU control unit can arrange the automatic charging time, and after exceeding the scheduled time, MCU control unit can send the switching circuit of cut-off signal.The switching tube Q1 of switching circuit dams, and whole charging circuit disconnects, and reaches the effect that can not overcharge.The scheduled time can be arranged between 6 to 18 hours, was wherein arranged on 12 hours for most suitable.
As shown in Figure 5, MCU power supply unit is made up of three-terminal voltage-stabilizing chip U2, voltage-stabiliser tube D1, diode D2, D3, electric capacity C3, C4, C5, C6 and resistance R9.Wherein three-terminal voltage-stabilizing chip U2 model adopts 78L05.The voltage input of MCU power supply unit can be battery anode, also can be the positive output end of downconverter unit.The access of battery pack can be utilized like this as starting resistor.
Temperature sensor adopts thermistor (temperature) sensor.Temperature sensor is placed in the charger of this charging circuit of use, detects charging circuit and whether reaches limiting temperature.If after reaching limiting temperature, MCU control unit can start fan and reduce charging circuit temperature.Reach temperature control effect, protection charging circuit can not burn out.The general power output of the utility model does not need to start fan and chargeable in the scope of 200W to 400W.
MCU control unit can also according to charged state and battery charge capacity, and output signal makes LED light carry out the flicker of different frequency, reflects whole charging process intuitively.
Operation principle is: after battery pack connects charging circuit, is powered to MCU control unit by MCU power supply unit, as startup accessory power supply.After charging circuit starts, downconverter unit exports as charging circuit main power source.Be depressured to 5V by the voltage stabilizing chip U2 of MCU power supply unit to power to MCU control unit.MCU control unit detects battery pack specification by voltage sampling circuit and whether meets charging circuit; Ambient temperature is gathered, voltage compensation when charging under providing Current Temperatures by temperature sensor.Charge mode can be entered, if battery reversal connection, not by above-mentioned trace routine after completing above-mentioned trace routine.
MCU control unit produces the control input end of pwm control signal to isolation voltage transformation unit, and now the duty ratio of pwm control signal increases gradually.Simultaneously by the signal of current detection circuit, the pulsewidth of MCU control unit adjustment pwm control signal realizes constant current charge.
The constant pressure point reaching setting when charging voltage is, MCU control unit reduces the duty ratio of PWM, and the adjustment according to duty ratio realizes constant voltage charge.In constant voltage charge process, when charging current is less than floating charge breakover current, MCU control unit adjusts the duty ratio of pwm control signal again, and charging circuit enters the floating charge stage.
The utility model structure is simple, is convenient to produce and application.
Claims (6)
1. a charging circuit for LC resonance high energy conversion, comprising: battery pack; Boosting voltage transformation unit, for converting 220V alternating current to High voltage output; Downconverter unit, for converting above-mentioned High voltage output to charging voltage, is characterized in that, also comprising: MCU control unit, for adjusting pwm control signal duty ratio in real time according to each input signal; Isolation voltage transformation unit, for the pwm control signal adjustment charging voltage according to input; Voltage collection circuit, for gathering the voltage signal of charging circuit; Current detection circuit, for detecting the current signal of charging circuit; MCU power supply unit, for powering to MCU control unit; 220V alternating current connects the voltage input end of boosting voltage transformation unit, and the voltage output end of downconverter unit connects the corresponding both positive and negative polarity of battery, and isolation variable-voltage power supply is connected between boosting voltage transformation unit and downconverter unit and forms each self-loop; The PWM control output end of MCU control unit connects the PWM control input end of isolation voltage transformation unit, the current signal input of MCU control unit is connected in series current detection circuit with between battery cathode, the voltage signal inputs of MCU control unit is connected in series voltage collection circuit with between anode, the voltage input end of MCU control unit be connected in series MCU power supply unit between battery anode.
2. charging circuit according to claim 1, is characterized in that, also comprises: temperature sensor, for detecting the temperature of whole charging circuit; The warming signal output part of described temperature sensor connects the warming signal input part of MCU control unit.
3. charging circuit according to claim 2, is characterized in that, temperature sensor adopts thermistor (temperature) sensor.
4. charging circuit according to claim 1, is characterized in that, also comprises: LED light, for showing charged state; Described LED light connects the cresset output of MCU control unit.
5. charging circuit according to claim 1, is characterized in that, also comprises: fan, for reducing charging circuit temperature; Described fan connects the cooling signal output of MCU control unit.
6. charging circuit according to claim 1, is characterized in that, also comprises: switching circuit, for preventing battery pack reversal connection; Described switching circuit is serially connected with between battery electrode and downconverter unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201520353430.1U CN204652015U (en) | 2015-05-27 | 2015-05-27 | A kind of charging circuit of LC resonance high energy conversion |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520353430.1U CN204652015U (en) | 2015-05-27 | 2015-05-27 | A kind of charging circuit of LC resonance high energy conversion |
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| CN204652015U true CN204652015U (en) | 2015-09-16 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107592028A (en) * | 2017-09-04 | 2018-01-16 | 佛山市索尔电子实业有限公司 | A kind of inverter circuit system |
| CN108306400A (en) * | 2018-03-22 | 2018-07-20 | 广州云阳电子科技有限公司 | A kind of detectable Cross prevention battery pack connects and starts the intelligent charger and its implementation of charging automatically |
| CN110712555A (en) * | 2019-11-21 | 2020-01-21 | 浙江宝聚通信息科技有限公司 | Electric vehicle charging pile with adjustable output voltage and method for adjusting charging voltage |
-
2015
- 2015-05-27 CN CN201520353430.1U patent/CN204652015U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107592028A (en) * | 2017-09-04 | 2018-01-16 | 佛山市索尔电子实业有限公司 | A kind of inverter circuit system |
| CN107592028B (en) * | 2017-09-04 | 2020-03-31 | 佛山市索尔电子实业有限公司 | Inverter circuit system |
| CN108306400A (en) * | 2018-03-22 | 2018-07-20 | 广州云阳电子科技有限公司 | A kind of detectable Cross prevention battery pack connects and starts the intelligent charger and its implementation of charging automatically |
| CN110712555A (en) * | 2019-11-21 | 2020-01-21 | 浙江宝聚通信息科技有限公司 | Electric vehicle charging pile with adjustable output voltage and method for adjusting charging voltage |
| CN110712555B (en) * | 2019-11-21 | 2023-09-19 | 浙江宝聚通信息科技有限公司 | Electric vehicle charging pile with adjustable output voltage and method for adjusting charging voltage |
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