CN104917222B - Electric-vehicle-mounted digital charger - Google Patents
Electric-vehicle-mounted digital charger Download PDFInfo
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- CN104917222B CN104917222B CN201510007278.6A CN201510007278A CN104917222B CN 104917222 B CN104917222 B CN 104917222B CN 201510007278 A CN201510007278 A CN 201510007278A CN 104917222 B CN104917222 B CN 104917222B
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- 238000010521 absorption reaction Methods 0.000 claims abstract description 14
- 238000005070 sampling Methods 0.000 claims abstract description 6
- 239000003990 capacitor Substances 0.000 claims description 31
- 238000001514 detection method Methods 0.000 claims description 19
- 230000005669 field effect Effects 0.000 claims description 12
- 238000004804 winding Methods 0.000 claims description 11
- 101000941170 Homo sapiens U6 snRNA phosphodiesterase 1 Proteins 0.000 claims description 6
- 102100031314 U6 snRNA phosphodiesterase 1 Human genes 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 6
- 230000001629 suppression Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 2
- 230000009466 transformation Effects 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007850 degeneration Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
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Abstract
The present invention is applicable in electric automobiles, provides a kind of electric-vehicle-mounted digital charger, and the charger includes：Inverse-excitation type switch power-supply AC DC circuits, peak voltage absorption circuit, sampling feedback circuit, output constant current constant voltage circuit；Wherein, inverse-excitation type switch power-supply AC DC circuits are that electric energy transmits main circuit, the circuit is connect with peak voltage absorption circuit, sampling feedback circuit, output constant current constant voltage circuit respectively, and technical solution provided by the invention has the advantages that realize the unprecedented application of DC DC transformation with AC DC circuit topologies.
Description
Technical Field
The invention belongs to the field of electric vehicles, and particularly relates to a vehicle-mounted digital charger for an electric vehicle.
Background
Electric vehicles, i.e., electric bicycles and electric motorcycles, are electromechanical integrated personal transportation devices that use a battery as an auxiliary energy source, and that are equipped with a motor, a controller, a battery, a handlebar, and other operating components and a display instrument system on the basis of a common bicycle. The electric vehicle is developed at a rapid speed, users using the electric vehicle are increasing day by day, and the electric vehicle has huge mobile power supply capacity.
In the prior art solution, the following technical problems are found to exist in the prior art solution:
the electric vehicle provided by the prior art cannot provide a vehicle-mounted charging function, which is very inconvenient for users, for example, when the traveling time of the electric vehicle is long, such as a courier, a take-out delivery person, a farmer riding the vehicle to the ground and doing business, the use frequency of devices such as a mobile phone is very high, and the power consumption of the battery is faster due to the increase of the power consumption of a smart phone, so that a digital charger capable of charging the electric vehicle at any time is urgently needed.
Disclosure of Invention
The embodiment of the invention aims to provide a vehicle-mounted digital charger for an electric vehicle, and aims to solve the problems that the electric vehicle in the prior art cannot carry out vehicle charging and the AC-DC circuit topology cannot realize low-voltage DC-DC conversion.
The embodiment of the present invention is achieved as described above, and provides a vehicle-mounted digital charger for an electric vehicle, the charger including: the flyback switching power supply comprises a flyback switching power supply AC-DC circuit, a peak voltage absorption circuit, a sampling feedback circuit and an output constant current and constant voltage circuit; wherein,
optionally, the charger specifically includes: the input protective tube, a resistor, a capacitor, a transformer, a diode, a bridge rectifier, a field effect tube, a photoelectric coupler, a current type PWM controller and a built-in 2.5V reference operational amplifier; wherein,
f1 is an input protective tube, which is used for disconnecting the connection between the charger circuit and the external electric vehicle battery power supply when the current flowing through the rear-stage circuit is overloaded due to the electrical fault; the BD1 is a bridge rectifier and is used for converting the direct current voltage input with unfixed positive and negative polarities into the direct current voltage output with the fixed positive and negative polarities so as to realize the function of inputting the voltage without distinguishing the positive and negative polarities; u1 is a current type PWM controller, and is used for generating PWM signals to drive the field effect transistor Q1 to work in a switching state and controlling the over-current protection, the over-voltage protection, the over-load protection, the over-temperature protection, the duty ratio modulation and the like of the whole machine; the reference operational amplifier U2 is a built-in 2.5V reference operational amplifier, and is used for collecting output current and voltage signals, and controlling the conduction depth of the photoelectric coupler U2 through the comparison result with the internal 2.5V reference voltage, so that the duty ratio of U1 is indirectly controlled, and the output voltage and the current are always kept in a set constant state.
The working principle is as follows:
the input terminals of IN1 and IN2 are connected to the charging/discharging port of the electric vehicle, the battery of the electric vehicle is supplied with 30-120V DC voltage with unfixed positive and negative polarities, the voltage is converted into 30-120V DC voltage with fixed positive and negative polarities through a bridge rectifier BD1 and is output to a primary part circuit for supplying power, a starting resistor R6 works after power-on, the fixed positive and negative polarities 30-120V output by the bridge rectifier BD1 generate current through R6 to charge a VCC filter capacitor C5, when the voltage on C5 is charged to 16.5V, U1 starts working (16.5V is the threshold starting voltage of U1), after U1 starts working, a 50KHZ square wave pulse signal with duty ratio of 0.35 is output by 6 pins of the U1, the Q1 is continuously switched on and off at 50KHZ frequency of 0.35 through R7 and D3, when Q1 is switched on, the primary winding 2 and the pin 1 of a high-frequency transformer T1 starts energy storage, and the Q1 is switched off when the primary winding is, after the AUX is electrified, the voltage is rectified into low-frequency pulsating direct current voltage by D2, and the direct current voltage is filtered by a capacitor C5 and subjected to interference elimination by C2 to supply power to a 5-pin VDD of U1.
The secondary winding obtains 50KHZ high-frequency pulse voltage and then is rectified into low-frequency pulsating direct-current voltage through D4, the pulsating direct-current voltage is filtered by a capacitor C6 and then is converted into smooth pure direct-current voltage to supply power to U2A and U2 and supply power to an output port, the U2 can detect output voltage and current in real time while supplying power to the output port, if the output voltage and the current are not in a set range, U2 can signal to enable U2A conduction depth to change, a receiving end U2B of the U2A can change 2-pin voltage of U1 after the U2A conduction depth changes, and the Q1 conduction duty ratio can be synchronously adjusted when the 2-pin voltage of the U1 changes, so that the output is always kept stable.
In addition to the basic workflow mentioned above, pins 2 and 4 of U1 are continuously detecting circuit parameters after power up, and when a certain project parameter exceeds a set range, U1 will automatically make corresponding adjustment to keep the output terminal at 5V/1A all the time to charge the digital product.
In the embodiment of the invention, the technical scheme provided by the invention has the advantage of realizing the unprecedented application of DC-DC conversion by using the AC-DC circuit topology.
Drawings
Fig. 1 is a circuit block diagram of an electric vehicle-mounted digital charger provided by the invention;
fig. 2 is a schematic circuit diagram of the vehicle-mounted digital charger for the electric vehicle according to the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The specific embodiment of the present invention provides a vehicle-mounted digital charger for an electric vehicle, as shown in fig. 1, including: the flyback switching power supply AC-DC circuit is a main electric energy transmission circuit and is respectively connected with the peak voltage absorption circuit, the sampling feedback circuit and the output constant current and constant voltage circuit
The technical scheme provided by the invention provides the vehicle-mounted charger on the electric vehicle, so that the vehicle-mounted charger has the advantage of charging the electric vehicle on a vehicle.
Optionally, the charger specifically includes: an input protective tube, a resistor, a capacitor, a transformer, a diode, a bridge rectifier, a field effect tube, a photoelectric coupler, a current type PWM controller, a built-in 2.5V reference operational amplifier,
f1 is an input protective tube, which is used for disconnecting the connection between the charger circuit and the external electric vehicle battery power supply when the current flowing through the rear-stage circuit is overloaded due to the electrical fault; the BD1 is a bridge rectifier and is used for converting the direct current voltage input with unfixed positive and negative polarities into the direct current voltage output with the fixed positive and negative polarities so as to realize the function of inputting the voltage without distinguishing the positive and negative polarities; u1 is a current type PWM controller, and is used for generating PWM signals to drive the field effect transistor Q1 to work in a switching state and controlling the over-current protection, the over-voltage protection, the over-load protection, the over-temperature protection, the duty ratio modulation and the like of the whole machine; u2 is a built-in 2.5V reference operational amplifier, and is used for collecting output current and voltage signals, and controlling the conduction depth of the photoelectric coupler U2 through the comparison result with the internal 2.5V reference voltage, thereby indirectly controlling the duty ratio of U1 and keeping the output voltage and the current in a set constant state all the time.
As shown in fig. 2, the charger specifically includes: the input protective tube, a resistor, a capacitor, a transformer, a diode, a bridge rectifier, a field effect tube, a photoelectric coupler, a current type PWM controller and a built-in 2.5V reference operational amplifier;
circuit primary side connection feature: two ends of the input fuse F1 are respectively connected with the input IN1 port and the AC end of the bridge rectifier BD 1; the DC end of the bridge rectifier BD1 is connected with one end of a pin 1 of a primary winding of a high-frequency transformer T1, a starting resistor R6, an absorption resistor R1 and an absorption capacitor C1; pin 1 of the current-mode PWM controller U1 is connected with a primary ground wire; a pin 2 of the U1 is connected with a collecting electrode of a phototriode of a photoelectric coupler U2B and one end of a low-pass filter capacitor C3; the 3 pin of U1 is connected with one end of a pulse frequency setting resistor R2; the 4 pins of the U1 are connected with one end of a capacitor C4 and one end of a resistor R4 in the peak current detection RC network; a pin 5 of the U1 is connected with the other end of the starting resistor R6 and one ends of VCC filter networks C5 and R5, a pin 6 of the U1 is connected with one end of a driving resistor R7 and the cathode of a fast turn-off diode D3, and the other end of the R7 and the anode of the D3 are both connected with the gate of a field effect transistor Q1; the drain electrode of the field effect transistor Q1 is connected to the pin 2 of the primary winding of the high-frequency transformer T1 and the anode of the absorption diode D1; the cathode of the absorption diode D1 is connected with the other ends of R1 and C1; the lower end of the spike current detection resistors R3A and R3B are connected with a primary ground wire after being connected in parallel, and the upper end of the spike current detection resistors is connected with the source electrode of the field effect transistor Q1 and the other end of the resistor R4; 4 pins of an AUX winding of the high-frequency transformer T1 are connected with a primary ground wire, and 3 pins of the high-frequency transformer T1 are connected with a VCC rectifier diode D2 anode; the cathode of the rectifier diode D2 is connected with the other end of the resistor R5;
circuit secondary side connection feature: a pin 7 of a secondary winding of the high-frequency transformer T1 is connected with a secondary ground wire, and a pin 5 of the T1 is connected with an anode of an output rectifier diode D4; the other ends of the output filter capacitor C6 and the output high-frequency suppression capacitor C7 are connected with a secondary ground wire, and one ends of C6 and C7 are connected with the cathode of the output rectifier diode D4 and a pin 1 of the output port USB 1; the output current detection resistors R8A and R8B are connected in parallel, the left end of the output current detection resistor is connected with a secondary ground wire, and the right end of the output current detection resistor is connected with the 4 pins of the output port USB1 and one end of the feedback resistor R13; pins 2 and 3 of the output port USB1 are short-circuited; a pin 1 of the built-in 2.5V reference operational amplifier U2 is connected with a common point of the output voltage detection resistors R10, R11 and the negative feedback resistor R12; the pin 2 of the U2 is connected with the common point of the parallel network right end of the output voltage detection resistors R10, R8A and R8B, the pin 4 of the output port USB1 and the feedback resistor R13; the pin 3 of the U2 is connected with the common point of the connection of a current limiting resistor R9, C8 and C9; a pin 4 of the U2 is connected with a secondary ground wire, and a pin 5 of the U2 is connected with the other end of the feedback resistor R13 and the other end of the negative feedback resistor R14; the pin 6 of the U2 is connected with the common connection point of the output voltage detection resistor R11, the positive electrode of the light emitting diode of the photoelectric coupler U2A, the negative electrode of the output rectifier diode D4, the output filter capacitor C6, the output high-frequency suppression capacitor C7 and the pin 1 of the output port USB 1; the negative electrode of the light emitting diode of the photoelectric coupler is connected with one end of a current limiting resistor R9; the other end of the negative feedback resistor R12 is connected with the other end of the negative feedback capacitor C8; one end of the degeneration resistor R14 is connected to the other end of the degeneration capacitor C9.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (1)
1. An on-board digital charger for an electric vehicle, the charger comprising: the flyback switching power supply comprises a flyback switching power supply AC-DC circuit, a peak voltage absorption circuit, a sampling feedback circuit and an output constant current and constant voltage circuit; the flyback switching power supply AC-DC circuit is a main electric energy transmission circuit, and the main circuit is respectively connected with a peak voltage absorption circuit, a sampling feedback circuit and an output constant current and constant voltage circuit; the charger specifically includes: the input protective tube, a resistor, a capacitor, a transformer, a diode, a bridge rectifier, a field effect tube, a photoelectric coupler, a current type PWM controller and a built-in 2.5V reference operational amplifier;
circuit primary side connection feature: two ends of the input fuse F1 are respectively connected with the input IN1 port and the AC end of the bridge rectifier BD 1; the DC end of the bridge rectifier BD1 is connected with one end of a pin 1 of a primary winding of a high-frequency transformer T1, a starting resistor R6, an absorption resistor R1 and an absorption capacitor C1; pin 1 of the current-mode PWM controller U1 is connected with a primary ground wire; a pin 2 of the U1 is connected with a collector of a phototriode of a photoelectric coupler U2-B and one end of a low-pass filter capacitor C3; the 3 pin of U1 is connected with one end of a pulse frequency setting resistor R2; the 4 pins of the U1 are connected with one end of a capacitor C4 and one end of a resistor R4 in the peak current detection RC network; a pin 5 of the U1 is connected with the other end of the starting resistor R6 and one ends of VCC filter networks C5 and R5, a pin 6 of the U1 is connected with one end of a driving resistor R7 and the cathode of a fast turn-off diode D3, and the other end of the R7 and the anode of the D3 are both connected with the gate of a field effect transistor Q1; the drain electrode of the field effect transistor Q1 is connected to the pin 2 of the primary winding of the high-frequency transformer T1 and the anode of the absorption diode D1; the cathode of the absorption diode D1 is connected with the other ends of R1 and C1; the lower end of the spike current detection resistors R3A and R3B are connected with a primary ground wire after being connected in parallel, and the upper end of the spike current detection resistors is connected with the source electrode of the field effect transistor Q1 and the other end of the resistor R4; the pin 4 of the auxiliary winding of the high-frequency transformer T1 is connected with a primary ground wire, and the pin 3 of the high-frequency transformer T1 is connected with the positive pole of a VCC rectifying diode D2; the cathode of the rectifier diode D2 is connected with the other end of the resistor R5;
circuit secondary side connection feature: a pin 7 of a secondary winding of the high-frequency transformer T1 is connected with a secondary ground wire, and a pin 5 of the T1 is connected with an anode of an output rectifier diode D4; the other ends of the output filter capacitor C6 and the output high-frequency suppression capacitor C7 are connected with a secondary ground wire, and one ends of C6 and C7 are connected with the cathode of the output rectifier diode D4 and a pin 1 of the output port USB 1; the output current detection resistors R8A and R8B are connected in parallel, the left end of the output current detection resistor is connected with a secondary ground wire, and the right end of the output current detection resistor is connected with the 4 pins of the output port USB1 and one end of the feedback resistor R13; pins 2 and 3 of the output port USB1 are short-circuited; a pin 1 of the built-in 2.5V reference operational amplifier U2 is connected with a common point of the output voltage detection resistors R10, R11 and the negative feedback resistor R12; the 2 pin of the reference operational amplifier U2 is connected with the common point of the parallel network right end of the output voltage detection resistors R10, R8A and R8B, the 4 pin of the output port USB1 and the feedback resistor R13; the pin 3 of the reference operational amplifier U2 is connected with the common point of the connection of the current limiting resistor R9, the C8 and the C9; a pin 4 of the reference operational amplifier U2 is connected with a secondary ground wire, and a pin 5 of the reference operational amplifier U2 is connected with the other end of the feedback resistor R13 and the other end of the negative feedback resistor R14; the 6 pins of the reference operational amplifier U2 are connected with a common point for connecting the output voltage detection resistor R11, the positive electrode of the light emitting diode of the photoelectric coupler U2-A, the negative electrode of the output rectifier diode D4, the output filter capacitor C6, the output high-frequency suppression capacitor C7 and the 1 pin of the output port USB 1; the negative electrode of the light emitting diode of the photoelectric coupler is connected with one end of a current limiting resistor R9; the other end of the negative feedback resistor R12 is connected with the other end of the negative feedback capacitor C8; one end of a negative feedback resistor R14 is connected with the other end of a negative feedback capacitor C9, one end of a negative feedback capacitor C9 is connected with one end of a negative feedback capacitor C8, and the other end of the negative feedback resistor R14 is connected with the other end of a feedback resistor R13;
the other end of the third capacitor C3, the other end of the second resistor R2, the other end of the fourth capacitor C4, the other end of the fifth capacitor C5 and the drain electrode of the photoelectric coupler U2-B are all connected with a primary ground wire;
the second capacitor C2 is connected between the No. 1 pin and the No. 5 pin of the U1, and the upper end of the spike current detection resistors R3A and R3B is connected with the other end of the fourth resistor R4 after being connected in parallel;
the other end of the ninth resistor R9 is connected with pin No. 3 of U2, one end of the twelfth resistor R12 is connected with pin No. 1 of U2, one end of the tenth resistor R10 is connected with pin No. 2 of U2, the other end of the tenth resistor R10 is connected with pin No. 1 of U2, one end of the eleventh resistor R11 is connected with pin No. 1 of U2, and the other end of the eleventh resistor R11 is connected with pin No. 6 of U2.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510007278.6A CN104917222B (en) | 2015-01-05 | 2015-01-05 | Electric-vehicle-mounted digital charger |
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| CN201510007278.6A CN104917222B (en) | 2015-01-05 | 2015-01-05 | Electric-vehicle-mounted digital charger |
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| CN104917222A CN104917222A (en) | 2015-09-16 |
| CN104917222B true CN104917222B (en) | 2018-08-10 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP6503138B2 (en) | 2016-02-05 | 2019-04-17 | グァンドン オッポ モバイル テレコミュニケーションズ コーポレーション リミテッドＧｕａｎｇｄｏｎｇ Ｏｐｐｏ Ｍｏｂｉｌｅ Ｔｅｌｅｃｏｍｍｕｎｉｃａｔｉｏｎｓ Ｃｏｒｐ．， Ｌｔｄ． | Adapter and charge control method |
| CN112491124A (en) * | 2020-10-19 | 2021-03-12 | 安克创新科技股份有限公司 | Circuit and method for reducing volume and improving efficiency of charger |
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|---|---|---|---|---|
| CN2236669Y (en) * | 1995-10-26 | 1996-10-02 | 王华茂 | Single-end flyback switching power supply |
| CN102097947A (en) * | 2010-12-27 | 2011-06-15 | 东莞市奇立电源有限公司 | Method and device for expanding power of single-ended flyback switching mode power supply |
| CN102738872A (en) * | 2011-04-08 | 2012-10-17 | 郑佩尧 | Separately-charging battery charger |
| CN204376465U (en) * | 2015-01-05 | 2015-06-03 | 惠州市英盟科技有限公司 | Electric-vehicle-mounted digital charger |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100289463A1 (en) * | 2009-05-13 | 2010-11-18 | Yen-Hui Wang | Primary-side feedback control device and related method for a power converter |
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2015
- 2015-01-05 CN CN201510007278.6A patent/CN104917222B/en active Active
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|---|---|---|---|---|
| CN2236669Y (en) * | 1995-10-26 | 1996-10-02 | 王华茂 | Single-end flyback switching power supply |
| CN102097947A (en) * | 2010-12-27 | 2011-06-15 | 东莞市奇立电源有限公司 | Method and device for expanding power of single-ended flyback switching mode power supply |
| CN102738872A (en) * | 2011-04-08 | 2012-10-17 | 郑佩尧 | Separately-charging battery charger |
| CN204376465U (en) * | 2015-01-05 | 2015-06-03 | 惠州市英盟科技有限公司 | Electric-vehicle-mounted digital charger |
Non-Patent Citations (1)
| Title |
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| 基于UC3843的反激式开关电源反馈电路的设计;陈小敏 等;《通信电源技术》;20060925;第23卷(第5期);第38-40页 * |
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