CN106972457B - A kind of charger is controllable outer for short circuit protection circuit - Google Patents
A kind of charger is controllable outer for short circuit protection circuit Download PDFInfo
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- CN106972457B CN106972457B CN201710379973.4A CN201710379973A CN106972457B CN 106972457 B CN106972457 B CN 106972457B CN 201710379973 A CN201710379973 A CN 201710379973A CN 106972457 B CN106972457 B CN 106972457B
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
-
- 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
- H02J7/0029—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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Dc-Dc Converters (AREA)
Abstract
It is controllable outer for short circuit protection circuit, including driving isolation circuit, driving conversion circuit, switching tube Q1, level isolation conversion circuit, Input voltage terminal Vin, output voltage anode Vo, Power Groud GND1, output voltage negative terminal GND2, level sensitive circuit, CAN communication circuit and control panel that the present invention discloses a kind of charger.It can realize that outer power supply open and close control for short circuit protection circuit outside charger proposed by the present invention is controllable；Fast short-circuit protective can be achieved, fast response time reduces power tube stress.
Description
Technical field
The present invention relates to Vehicular charger technical field more particularly to a kind of charger, controllably outer power supply short-circuit protection is electric
Road.
Background technique
In vehicle-mounted charge system, there are many devices, and Vehicular charger to be needed to provide power supply.Usually need power supply unit and control
Not altogether, and power reguirements can turn off control to coremaking piece, and this requires carry out isolation control.Since Vehicular charger is externally to supply
Electricity need to carry out short-circuit test, it is therefore necessary to have short-circuit protection function.Conventional short-circuit protection is as shown in Figure 1, when secondary side short circuit is former
Side auxiliary power supply can not power for power supply control chip, and the input voltage Vcc of power supply control chip is caused to decline, and arrive under-voltage point
When, power supply control chip stops working.At this moment it can only be capacitor C charging by resistance R by bus Vbus, work as power supply control chip
Input voltage Vcc when reaching opening point, power supply control chip is restarted.It can be seen that this short-circuit protection mode is by primary side power supply
Control chip constantly reboots into hiccup protections.If this protection mechanism will reduce shorted devices stress, need to shorten power supply
The working time for controlling chip extends it and has the hiccups the time.This requires modifying resistance R, capacitor C parameter, resistance R needs to increase, and
Capacitor C then needs a desired value, because capacitor C increase can extend the hiccup time, but when short circuit when power supply control chip work
Between can also extend so that it is too long often to will cause the power supply available machine time, in some instances it may even be possible to cause low temperature that can not start.Therefore,
The response speed of other performance in order to balance, conventional short-circuit protection is often excessively slow, and device is caused to be subjected to very big short-circuit stress.
Summary of the invention
It is an object of the invention to controllable outer for short circuit protection circuit by a kind of charger, to solve background above skill
The problem of art part is mentioned.
To achieve this purpose, the present invention adopts the following technical scheme:
A kind of charger is controllable outer for short circuit protection circuit comprising driving isolation circuit, driving conversion circuit, switch
Conversion circuit, Input voltage terminal Vin, output voltage anode Vo, Power Groud GND1, output voltage negative terminal is isolated in pipe Q1, level
GND2, level sensitive circuit, CAN communication circuit and control panel；The primary side and driving conversion electricity of the driving isolation circuit
The connection of road one end, the driving isolation circuit secondary side are connect with the control electrode of the switching tube Q1；The first of the switching tube Q1
Terminals connect the output voltage negative terminal GND2, and the second terminals of the switching tube Q1 are connect with the Power Groud GND1；
The primary side of level isolation conversion circuit is connect with the output voltage anode Vo, the output voltage anode Vo with it is described defeated
Enter voltage end Vin connection, the secondary side of the level isolation conversion circuit is connect with the level sensitive circuit；The control panel with
The driving conversion circuit, the level sensitive circuit, CAN communication circuit connection.
Particularly, the driving conversion circuit includes resistance R5 and switching tube Q2；One end of the resistance R5 and the control
Making sheet connection, the other end of the resistance R5 are connect with the switching tube Q2 control electrode, the first terminals of the switching tube Q2
It is connect with the driving isolation circuit, the second terminals of the switching tube Q2 are connect with the digitally Vss；Wherein, work as institute
State switching tube Q2 select bipolar junction transistor when, the first terminals, the second terminals of the switching tube Q2 be respectively collector,
Emitter；When the switching tube Q2 selects field effect transistor, the first terminals, the second terminals of switching tube Q2 are respectively
Drain electrode, source electrode.
Particularly, the driving isolation circuit includes resistance R3, optocoupler OP1 and resistance R2；One end of the resistance R3 connects
Meet feeder ear Vcc connection, the first pin company of the other end of the resistance R3 and the driving conversion circuit, the optocoupler OP1
It connects, the second pin of the optocoupler OP1 is connect with digitally Vss, and the third pin and Power Groud GND1 of the optocoupler OP1 connects
It connects, the 4th pin of the optocoupler OP1 is connect with the control electrode of the resistance R2, the switching tube Q1.
Particularly, the level isolation circuit includes resistance R1 and optocoupler OP2；One end of the resistance R1 and the output
Positive voltage terminal Vo connection, the other end of the resistance R1 are connect with the first pin of the optocoupler OP2, and the of the optocoupler OP2
Two pins are connect with output voltage negative terminal GND2, and the third pin of the optocoupler OP2 is connect with level sensitive circuit, the light
The 4th pin of coupling OP2 is connect with feeder ear Vcc.
Particularly, the level sensitive circuit includes resistance R4；One end of the resistance R4 and the control panel, the light
The third pin of coupling OP2 connects, and the other end of the resistance R4 connects digitally Vss.
Particularly, the control panel includes digital signal processor, and the digital signal processor uses STMicw Electronics
STM32F042K6T6 type control chip.
Particularly, the switching tube Q1 select bipolar junction transistor, field effect transistor it is any, when the switching tube
When Q1 selects bipolar junction transistor, the first terminals, the second terminals of the switching tube Q1 are respectively collector, emitter；
When the switching tube Q1 selects field effect transistor, the first terminals, the second terminals of switching tube Q1 are respectively drain electrode, source
Pole.
It can realize that outer power supply open and close control for short circuit protection circuit outside charger proposed by the present invention is controllable；It can be achieved
Fast short-circuit protective, fast response time reduce power tube stress.
Detailed description of the invention
Fig. 1 is that conventional short-circuit protects electrical block diagram；
Fig. 2 is that charger provided in an embodiment of the present invention is controllable outer for short circuit protection circuit structural block diagram；
Fig. 3 is the controllable outer circuit structure diagram for short circuit protection circuit of charger provided in an embodiment of the present invention；
Fig. 4 is the controllable outer control flow chart for short circuit protection circuit of charger provided in an embodiment of the present invention.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.It is understood that tool described herein
Body embodiment is used only for explaining the present invention rather than limiting the invention.It also should be noted that for the ease of retouching
It states, only some but not all contents related to the present invention are shown in the drawings, it is unless otherwise defined, used herein all
Technical and scientific term has the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.It is used herein
Term be intended merely to description specific embodiment, it is not intended that in limitation the present invention.
Shown in referring to figure 2., Fig. 2 is that charger provided in an embodiment of the present invention is controllable outer for short circuit protection circuit structure
Block diagram.
Controllable outer specifically include for short circuit protection circuit of charger drives isolation circuit 101, driving to turn in the present embodiment
Change circuit 102, switching tube Q1, level isolation conversion circuit 103, Input voltage terminal Vin, output voltage anode Vo, Power Groud
GND1, output voltage negative terminal GND2, level sensitive circuit 104, CAN communication circuit 105 and control panel 106；The driving isolation
The primary side of circuit 101 is connect with described 102 one end of driving conversion circuit, 101 secondary side of driving isolation circuit and the switch
The control electrode of pipe Q1 connects；The first terminals of the switching tube Q1 connect the output voltage negative terminal GND2, the switching tube
The second terminals of Q1 are connect with the Power Groud GND1；The primary side and output electricity of the level isolation conversion circuit 103
The Vo connection of positive pressure end, the output voltage anode Vo are connect with the Input voltage terminal Vin, and conversion circuit is isolated in the level
103 secondary side is connect with the level sensitive circuit 104；The control panel 106 and the driving conversion circuit 102, the electricity
Flat detection circuit 104, CAN communication circuit 105 connect.Bipolar junction transistor, field effect transistor can be selected in the switching tube Q1
It is any, when the switching tube Q1 select bipolar junction transistor when, the first terminals, the second terminals of the switching tube Q1
Respectively collector, emitter；When the switching tube Q1 selects field effect transistor, the first terminals of switching tube Q1, the
Two terminals are respectively drain electrode, source electrode.
Specifically, as shown in figure 3, driving conversion circuit 102 described in the present embodiment includes resistance R5 and switching tube Q2；Institute
The one end for stating resistance R5 is connect with the control panel 106, and the other end of the resistance R5 is connect with the switching tube Q2 control electrode,
The first terminals of the switching tube Q2 are connect with the driving isolation circuit 101, the second terminals of the switching tube Q2 with
The digitally Vss connection；Wherein, the switching tube Q2 can be selected bipolar junction transistor, field effect transistor it is any, when
When the switching tube Q2 selects bipolar junction transistor, the first terminals, the second terminals of the switching tube Q2 are respectively current collection
Pole, emitter；When the switching tube Q2 selects field effect transistor, the first terminals, the second terminals point of switching tube Q2
It Wei not drain, source electrode.In the present embodiment, the switching tube Q1, switching tube Q2 select bipolar junction transistor.
The driving isolation circuit 101 includes resistance R3, optocoupler OP1 and resistance R2；One end of the resistance R3, which connects, to be supplied
First pin of electric end Vcc connection, the other end of the resistance R3 and the driving conversion circuit 102, the optocoupler OP1 connects
It connects, the second pin of the optocoupler OP1 is connect with digitally Vss, and the third pin and Power Groud GND1 of the optocoupler OP1 connects
It connects, the 4th pin of the optocoupler OP1 is connect with the control electrode of the resistance R2, the switching tube Q1.The level isolation electricity
Road includes resistance R1 and optocoupler OP2；One end of the resistance R1 is connect with the output voltage anode Vo, and the resistance R1's is another
One end is connect with the first pin of the optocoupler OP2, and second pin and output voltage negative terminal GND2 of the optocoupler OP2 connects
It connects, the third pin of the optocoupler OP2 is connect with level sensitive circuit 104, the 4th pin and feeder ear of the optocoupler OP2
Vcc connection.The level sensitive circuit 104 includes resistance R4；One end of the resistance R4 and the control panel 106, the light
The third pin of coupling OP2 connects, and the other end of the resistance R4 connects digitally Vss.The control panel 106 in the present embodiment
Including digital signal processor, the digital signal processor controls chip using the STM32F042K6T6 type of STMicw Electronics.
When work, as shown in figure 4, the controllable outer control flow for short circuit protection circuit of charger explain the main points briefly it is as follows:
According to the level detection of the level sensitive circuit 104 as a result, control panel 106 controls the driving conversion circuit 102, institute is realized
State the switch motion of switching tube Q1；Voltage is low level at defeated output voltage anode Vo, and conversion circuit is isolated through the level
103, there is low and high level conversion in the level sensitive circuit 104, and the control panel 106 judges output short-circuit, described in control
Conversion circuit 102 is driven, switching tube Q1 enters hiccup protections mode (hiccup mode)；When output short-circuit disappearance, the control panel
106 are judged by the level change of the level sensitive circuit 104, pass through the driving conversion circuit 102, the driving
Isolation circuit 101 controls the switching tube Q1 and enters normal mode of operation；When host computer issues control by CAN communication circuit 105
System instruction is when turning off outer power supply to control panel 106, the control panel 106 by the driving conversion circuit 102, it is described drive every
From circuit 101, controls the switching tube Q1 and enter shutdown mode.
Technical solution of the present invention can realize outer power supply open and close control；Achievable fast short-circuit protective, fast response time,
Reduce power tube stress.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also
It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (7)
1. a kind of charger is controllable outer for short circuit protection circuit, which is characterized in that including driving isolation circuit, driving conversion electricity
Conversion circuit, Input voltage terminal Vin, output voltage anode Vo, Power Groud GND1, output voltage is isolated in road, switching tube Q1, level
Negative terminal GND2, level sensitive circuit, CAN communication circuit and control panel；The primary side of the driving isolation circuit and the driving turn
Circuit on one side connection is changed, the driving isolation circuit secondary side is connect with the control electrode of the switching tube Q1；The switching tube Q1's
First terminals connect the output voltage negative terminal GND2, and the second terminals of the switching tube Q1 and the Power Groud GND1 connect
It connects；The primary side of the level isolation conversion circuit is connect with the output voltage anode Vo, the output voltage anode Vo and institute
Input voltage terminal Vin connection is stated, the secondary side of the level isolation conversion circuit is connect with the level sensitive circuit；The control
Plate and the driving conversion circuit, the level sensitive circuit, CAN communication circuit connection.
2. charger according to claim 1 is controllable outer for short circuit protection circuit, which is characterized in that the driving conversion
Circuit includes resistance R5 and switching tube Q2；One end of the resistance R5 is connect with the control panel, the other end of the resistance R5
It is connect with the switching tube Q2 control electrode, the first terminals of the switching tube Q2 are connect with the driving isolation circuit, described
The second terminals of switching tube Q2 are connect with digitally Vss；Wherein, when the switching tube Q2 selects bipolar junction transistor, institute
State the first terminals of switching tube Q2, the second terminals are respectively collector, emitter；When the switching tube Q2 selects field-effect
When transistor, the first terminals, the second terminals of switching tube Q2 are respectively drain electrode, source electrode.
3. charger according to claim 2 is controllable outer for short circuit protection circuit, which is characterized in that the driving isolation
Circuit includes resistance R3, optocoupler OP1 and resistance R2；One end of the resistance R3 connects feeder ear Vcc connection, the resistance R3's
The other end is connect with the first pin of the driving conversion circuit, the optocoupler OP1, the second pin and number of the optocoupler OP1
Word Vss connection, the third pin of the optocoupler OP1 connect with Power Groud GND1, the 4th pin of the optocoupler OP1 with it is described
One end connection of resistance R2, the control electrode of the switching tube Q1 connect, and the other end and Input voltage terminal Vin of the resistance R2 connects
It connects.
4. charger according to claim 3 is controllable outer for short circuit protection circuit, which is characterized in that the level isolation
Circuit includes resistance R1 and optocoupler OP2；One end of the resistance R1 is connect with the output voltage anode Vo, the resistance R1's
The other end is connect with the first pin of the optocoupler OP2, and second pin and output voltage negative terminal GND2 of the optocoupler OP2 connects
It connects, the third pin of the optocoupler OP2 is connect with level sensitive circuit, and the 4th pin and feeder ear Vcc of the optocoupler OP2 connects
It connects.
5. charger according to claim 4 is controllable outer for short circuit protection circuit, which is characterized in that the level detection
Circuit includes resistance R4；One end of the resistance R4 is connect with the third pin of the control panel, the optocoupler OP2, the electricity
The other end for hindering R4 connects digitally Vss.
6. charger according to one of claims 1 to 5 is controllable outer for short circuit protection circuit, which is characterized in that described
Switching tube Q1 select bipolar junction transistor, field effect transistor it is any, when the switching tube Q1 select bipolar junction transistor
When, the first terminals, the second terminals of the switching tube Q1 are respectively collector, emitter；When the switching tube Q1 is selected
When field effect transistor, the first terminals, the second terminals of switching tube Q1 are respectively drain electrode, source electrode.
7. charger according to claim 6 is controllable outer for short circuit protection circuit, which is characterized in that the control panel packet
Digital signal processor is included, the digital signal processor controls chip using the STM32F042K6T6 type of STMicw Electronics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710379973.4A CN106972457B (en) | 2017-05-25 | 2017-05-25 | A kind of charger is controllable outer for short circuit protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710379973.4A CN106972457B (en) | 2017-05-25 | 2017-05-25 | A kind of charger is controllable outer for short circuit protection circuit |
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| Publication Number | Publication Date |
|---|---|
| CN106972457A CN106972457A (en) | 2017-07-21 |
| CN106972457B true CN106972457B (en) | 2019-09-13 |
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| CN201710379973.4A Active CN106972457B (en) | 2017-05-25 | 2017-05-25 | A kind of charger is controllable outer for short circuit protection circuit |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201869099U (en) * | 2010-11-04 | 2011-06-15 | 西安伟京电子制造有限公司 | Low-power single/double output power circuit device |
| CN203691214U (en) * | 2013-12-27 | 2014-07-02 | 天津瑞灵石油设备股份有限公司 | Pulse driving device used for three-phase half controlled full bridge rectifier |
| CN104092260A (en) * | 2014-07-11 | 2014-10-08 | 烟台北方星空自控科技有限公司 | High-power linear regulated power supply suitable for storage battery |
| CN207234379U (en) * | 2017-05-25 | 2018-04-13 | 无锡三石电子有限公司 | A kind of controllable outer power supply short-circuit protection circuit of charger |
-
2017
- 2017-05-25 CN CN201710379973.4A patent/CN106972457B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201869099U (en) * | 2010-11-04 | 2011-06-15 | 西安伟京电子制造有限公司 | Low-power single/double output power circuit device |
| CN203691214U (en) * | 2013-12-27 | 2014-07-02 | 天津瑞灵石油设备股份有限公司 | Pulse driving device used for three-phase half controlled full bridge rectifier |
| CN104092260A (en) * | 2014-07-11 | 2014-10-08 | 烟台北方星空自控科技有限公司 | High-power linear regulated power supply suitable for storage battery |
| CN207234379U (en) * | 2017-05-25 | 2018-04-13 | 无锡三石电子有限公司 | A kind of controllable outer power supply short-circuit protection circuit of charger |
Non-Patent Citations (1)
| Title |
|---|
| 一种基于UC1843_PWM控制器的短路保护方案;熊国兴等;《微电子学与计算机》;20141231;第48-56页 * |
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| CN106972457A (en) | 2017-07-21 |
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