CN206294067U - A kind of fool proof insulating power supply circuit being applied on BMS - Google Patents
A kind of fool proof insulating power supply circuit being applied on BMS Download PDFInfo
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- CN206294067U CN206294067U CN201621183078.2U CN201621183078U CN206294067U CN 206294067 U CN206294067 U CN 206294067U CN 201621183078 U CN201621183078 U CN 201621183078U CN 206294067 U CN206294067 U CN 206294067U
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Abstract
The utility model provides a kind of fool proof insulating power supply circuit being applied on BMS, including full bridge unit, over-current over-voltage protection unit, common mode inhibition unit, discharge loop, high frequency transformer, voltage regulation unit, voltage-limiting protection unit, switch element, optocoupler unit, the first filter unit, the second filter unit and source of stable pressure；The input of over-current over-voltage protection unit is connected to the output end of full bridge unit, the input of common mode inhibition unit is connected to the output end of over-current over-voltage protection unit, the first input end of high frequency transformer is connected to the output end of common mode inhibition unit and the output end of the discharge loop, the first input end of voltage regulation unit is connected to the output end of optocoupler unit, second input of voltage regulation unit is connected to the 3rd output end of high frequency transformer, the input of voltage-limiting protection unit is connected to the output end of voltage regulation unit, the input of switch element is connected to the output end of voltage-limiting protection unit, second input of high frequency transformer is connected to the output end of switch element.
Description
Technical field
The utility model belongs to technical field of battery management, more particularly, to a kind of fool proof isolation being applied on BMS
Power circuit.
Background technology
With developing rapidly for new-energy automobile industry, corresponding battery management system (BATTERY MANAGEMENT
SYSTEM, BMS) circuit design become increasingly complex, function is also increasingly enriched, to the stability requirement of power supply also increasingly
It is high.Double-deck or multi-layer sheet is slipped up because of external input power variation in voltage or artificial patching operations, is possible to burn out circuit board.If
Sheet material is unable to bear short circuit or the impact of overcurrent-overvoltage, and plate upward wiring is likely to blow, and can only finally scrap or fly line dimension
Repair treatment.Therefore possess fool proof input, short circuit, excessively stream, overvoltage protection, there is provided the power circuit of burning voltage output becomes particularly
It is important.
BMS circuit control panels of today mainly have following problem：Be both needed to during BMS electrical wirings it is noted that power supply it is positive and negative
Pole；Professional ability to actually used person has higher requirements；Mis-wired may lead to system abnormity；By extraneous input voltage fluctuation
Influence is big；Without overvoltage protection；Extraneous power supply and Internal power system are without isolating.
Communication CAN on BMS using balance two line differential interfaces, Typical operating voltages are 3.3V, with difference
When auto vendor and charging equipment CAN are interconnected, there is common-mode voltage very high between each node.Although CAN has one
Fixed ability resistant to common code interference, but when limiting voltage of the common-mode voltage higher than receiver, receiver just again cannot normal work
Make, even chip and instrument and equipment can be burnt when serious.Therefore BMS will be connected with external equipment, and out-put supply isolation must
It is few.
Existing power supply input protection is prevented by the combination of the low conducting pressure of diode unilateral conduction and metal-oxide-semiconductor
Input power is reversed and damages subsequent applications circuit, there is following weak point：(1) after input power misconnection is anti-, circuit board not work
Make, allow operating personnel to judge board failure by accident；(2) to directly result in whole circuit system unstable for the fluctuation of external input power,
Occur resetting, deadlock phenomenon；(3) BUCK Power converts cannot accomplish that DC isolates.
Utility model content
For the disadvantages described above or Improvement requirement of prior art, the utility model provide it is a kind of be applied on BMS it is anti-
Slow-witted insulating power supply circuit, the power input fool proof its object is to realize BMS circuit boards, multiple-output electric power isolation.
The utility model provides a kind of fool proof insulating power supply circuit being applied on BMS, including：Full bridge unit, excessively stream
Overvoltage protecting unit, common mode inhibition unit, discharge loop, high frequency transformer, voltage regulation unit, voltage-limiting protection unit, switch element,
Optocoupler unit, the first filter unit, the second filter unit and source of stable pressure；The full bridge unit has two inputs, the mistake
The input for flowing Overvoltage protecting unit is connected to the output end of the full bridge unit, the input connection of the common mode inhibition unit
To the output end of the over-current over-voltage protection unit, the first input end of the high frequency transformer is connected to the common mode inhibition list
The output end of unit and the output end of the discharge loop, the input of first filter unit are connected to the high frequency transformer
The first output end, the input of the source of stable pressure is connected to the output end of first filter unit, the optocoupler unit
Input is connected to the output end of the source of stable pressure, and the first input end of the voltage regulation unit is connected to the defeated of the optocoupler unit
Go out end, the second input of the voltage regulation unit is connected to the 3rd output end of the high frequency transformer, the voltage-limiting protection list
The input of unit is connected to the output end of the voltage regulation unit, and the input of the switch element is connected to the voltage-limiting protection list
The output end of unit, the input of the discharge loop is connected to the output end of the switch element, and the of the high frequency transformer
Two inputs are connected to the output end of the switch element, and the input of second filter unit is connected to the high frequency transformation
Second output end of device.
In the utility model, BMS power inputs do not repartition DC both positive and negative polarities, have stronger fault-tolerance.Overvoltage and mistake
Stream is all without influence subsequent conditioning circuit；CAN communication power unit realizes electrically full isolation using high frequency transformer, suppresses extraneous dry
Disturb.The stability of a whole set of BMS circuit boards is stronger.
Further, the full bridge unit includes：Diode D1, diode D2, diode D4 and diode D5；It is described
The negative electrode of the plus earth of the anode of diode D1 and the diode D4, the negative electrode of the diode D1 and the diode D2
As the first input end DC_INPUT1 of the full bridge unit after connection；The negative electrode of the diode D4 and the diode D5
Negative electrode connection after as full bridge unit the second input DC_INPUT2；The negative electrode and the diode of the diode D2
As the output end of full bridge unit after the negative electrode connection of D5.
Further, the over-current over-voltage protection unit includes：Fuse F1, thermistor NTC and diode D9；Institute
One end of fuse F1 is stated as the input of the over-current over-voltage protection unit, the other end of the fuse F1 is used as described
The output end of over-current over-voltage protection unit；The thermistor NTC is connected between the other end of the fuse F1 and ground；Institute
The negative electrode for stating diode D9 is connected to the other end of the fuse F1, the plus earth of the diode D9.
Further, the common mode inhibition unit includes：Common mode inductance L1, electric capacity C3 and electric capacity C4；The common mode electricity
Sense L1 includes the first winding and the second winding, the Same Name of Ends of the first winding as common mode inhibition unit input, the first winding
Different name end as common mode inhibition unit output end, the Same Name of Ends of the second winding and different name end be grounded, and the electric capacity C4 connects
It is connected between the Same Name of Ends of the Same Name of Ends of the first winding and the second winding；The electric capacity C3 is in parallel with the electric capacity C4.
Further, the voltage regulation unit includes：Voltage stabilizing chip U1 and its peripheral circuit；The voltage stabilizing chip U1's
COMP ends are connected to the 3rd end of optocoupler PC1 by resistance R11, and the Vref ends of voltage stabilizing chip U1 pass through the electricity being sequentially connected in series
Resistance R4 and resistance R13 is connected to the 3rd end of PC1, and the end that is connected in series of resistance R4 and resistance R13 is connected to voltage stabilizing chip U1's
RT/CT ends, the RT/CT ends of voltage stabilizing chip U1 are also grounded by electric capacity C7；The VFB ground connection of voltage stabilizing chip U1, voltage stabilizing chip U1's
Isense ends are grounded by electric capacity C8, and the Isense ends of voltage stabilizing chip U1 also pass through the resistance R10 and resistance that are sequentially connected in series
R12 is grounded；Resistance R10's and resistance R12 is connected in series the source electrode that end is connected to NMOS tube Q1；The anode connection of diode D10
To one end of second armature winding of ET1, the negative electrode of diode D10 is grounded by electric capacity C6；The negative electrode of diode D10 is also connected with
To the Vi ends of U1.
Further, switch element includes：The grid of NMOS tube Q1, the NMOS tube Q1 is connected by the resistance R7
To the output end of the voltage stabilizing chip U1, the drain electrode of the NMOS tube Q1 is connected to the anode of diode D7, the NMOS tube Q1
Source electrode be grounded by resistance R12.
Further, the voltage-limiting protection unit includes：Resistance R7, resistance R8 and diode D11；The resistance R7's
The other end that one end is connected to the output end OUT, the resistance R7 of the voltage stabilizing chip U1 is connected to the grid of NMOS tube Q1, institute
The negative electrode for stating diode D11 is connected to the output end OUT of the voltage stabilizing chip U1, and the anode of the diode D11 is connected to institute
The source electrode of NMOS tube Q1 is stated, the resistance R8 is connected in parallel with the diode D11.
In the utility model, D/C power input no longer distinguishes DC both positive and negative polarities, and power circuit is remained to normally after reverse power connection
Work, and the multichannel isolation DC outputs of stabilization can be provided under the extraneous fluctuation voltage of 18V-32V, there is very strong anti-interference energy
Power, is provided simultaneously with overvoltage and excessively stream rejection ability, prevents the unexpected damage of power panel.The specialty requirement of installation personnel is reduced, is carried
System Error-tolerance Property high.Can also avoid because of the failure of extraneous input voltage fluctuation, excessively stream and reverse power connection simultaneously, without worrying misconnection
Line, convenient and reliable, CAN communication power supply is isolated by DC/DC, it is ensured that communication chip normal work.
Brief description of the drawings
Fig. 1 is the theory diagram of the fool proof insulating power supply circuit being applied on BMS that the utility model is provided；
Fig. 2 is the physical circuit schematic diagram of the fool proof insulating power supply circuit being applied on BMS that the utility model is provided.
Specific embodiment
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and implementation
Example, is further elaborated to the utility model.It should be appreciated that specific embodiment described herein is only used to explain
The utility model, is not used to limit the utility model.Additionally, institute in the utility model disclosed below each implementation method
As long as the technical characteristic being related to does not constitute conflict and can just be mutually combined each other.
Fig. 1 shows the theory diagram of the fool proof insulating power supply circuit being applied on BMS that the utility model is provided；Fig. 2
The physical circuit of the fool proof insulating power supply circuit being applied on BMS that the utility model is provided is shown, for convenience of description, only
The part related to the utility model is shown, details are as follows：
The fool proof insulating power supply circuit being applied on BMS includes：Full bridge unit 1, the suppression of over-current over-voltage protection unit 2, common mode
Unit processed 3, discharge loop 4, high frequency transformer 5, voltage regulation unit 6, voltage-limiting protection unit 7, switch element 8, optocoupler unit 9,
One filter unit 10, the second filter unit 11 and source of stable pressure 12；Full bridge unit 1 has two inputs, over-current over-voltage protection list
The input of unit 2 is connected to the output end of full bridge unit 1, and the input of common mode inhibition unit 3 is connected to over-current over-voltage protection list
The output end of unit 2, the first input end of high frequency transformer 5 be connected to common mode inhibition unit 3 output end and discharge loop 4 it is defeated
Go out end, the input of the first filter unit 10 is connected to the first output end of high frequency transformer 5, the input connection of source of stable pressure 12
To the output end of the first filter unit 10, the input of optocoupler unit 9 is connected to the output end of source of stable pressure 12, voltage regulation unit 6
First input end is connected to the output end of optocoupler unit 9, and the second input of voltage regulation unit 6 is connected to the of high frequency transformer 5
Three output ends, the input of voltage-limiting protection unit 7 is connected to the output end of voltage regulation unit 6, and the input of switch element 8 is connected to
The output end of voltage-limiting protection unit 7, the input of discharge loop 4 is connected to the output end of switch element 8, high frequency transformer 5
Second input is connected to the output end of switch element 8, and the input of the second filter unit 11 is connected to the of high frequency transformer 5
Two output ends.
Wherein, full bridge unit 1 is used to realize DC supply input wiring fool proof；Including：Diode D1, diode D2, two
The plus earth of the anode and diode D4 of pole pipe D4 and diode D5, diode D1, the negative electrode and diode D2 of diode D1
Negative electrode connection after as full bridge unit 1 first input end DC_INPUT1；The negative electrode of diode D4 and the negative electrode of diode D5
As the second input DC_INPUT2 of full bridge unit 1 after connection；After the negative electrode connection of the negative electrode and diode D5 of diode D2
As the output end of full bridge unit 1.
Over-current over-voltage protection unit 2 is used to realize external voltage high voltage protective；Including：Fuse F1, thermistor NTC and
One end of diode D9, fuse F1 as over-current over-voltage protection unit 2 input, the other end of fuse F1 is used as output
End；Thermistor NTC is connected between the other end of fuse F1 and ground；The negative electrode of diode D9 is connected to the another of fuse F1
One end, the plus earth of diode D9.
Common mode inhibition unit 3 includes：Common mode inductance L1, electric capacity C3 and electric capacity C4；Common mode inductance L1 include the first winding and
Second winding, the Same Name of Ends of the first winding as common mode inhibition unit 3 input, the different name end of the first winding presses down as common mode
The output end of unit processed 3, the Same Name of Ends of the second winding and different name end are grounded, electric capacity C4 be connected to the first winding Same Name of Ends and
Between the Same Name of Ends of the second winding；Electric capacity C3 is in parallel with electric capacity C4.Wherein, common mode inductance L1 can be disturbed with suppression common mode signal.
Discharge loop 4 includes：Resistance R1, electric capacity C1 and diode D7, one end of resistance R1 as discharge loop 4 input
End, the other end of resistance R1 is connected to the negative electrode of diode D7, the anode of diode D7 as discharge loop 4 output end；Electricity
Hold C1 and resistance R1 to be connected in parallel.
High frequency transformer 5 includes：ET1, ET1 include the first armature winding, the second armature winding, the first secondary windings and the
Secondary stage winding, one end of the first armature winding is connected to the output end of common mode inhibition unit 3, the other end of the first armature winding
The anode of D7 is connected to, one end of the first secondary windings is connected to the anode of D6, the other end ground connection of the first secondary windings；Second
One end of armature winding is connected to the anode of D7, the other end ground connection of the second armature winding, one end connection of second subprime winding
To the anode of D8, the other end of second subprime winding is grounded.High frequency transformer 5 uses flyback transformer high, for isolating telecommunications
Number, transmit energy.
Voltage regulation unit 6 includes：Voltage stabilizing chip U1 and its peripheral circuit, the COMP ends of voltage stabilizing chip U1 are connected by resistance R11
The 3rd end of PC1 is connected to, the Vref ends of voltage stabilizing chip U1 pass through the resistance R4 being sequentially connected in series and resistance R13 is connected to PC1
The 3rd end, the end that is connected in series of resistance R4 and resistance R13 is connected to the RT/CT ends of voltage stabilizing chip U1, the RT/ of voltage stabilizing chip U1
CT ends are also grounded by electric capacity C7；The VFB ground connection of voltage stabilizing chip U1, the Isense ends of voltage stabilizing chip U1 are grounded by electric capacity C8,
The Isense ends of voltage stabilizing chip U1 are also grounded by the resistance R10 and resistance R12 that are sequentially connected in series；Resistance R10 and resistance R12
The end that is connected in series be connected to the source electrode of Q1；The anode of diode D10 is connected to one end of second armature winding of ET1, two poles
The negative electrode of pipe D10 is grounded by electric capacity C6；The negative electrode of diode D10 is additionally coupled to the Vi ends of U1.
Wherein, R10 is used as flow-restriction, by master control copped wave chip stand-by power supply；Resistance R4 and electric capacity C7 constitute vibration
Unit, for producing triangular wave；Resistance R12, resistance R10 and electric capacity C8 constitute chopper current sampling unit.Diode D10 and
The Main Function of electric capacity C6 is for filtering.
Voltage-limiting protection unit 7 is protected for metal-oxide-semiconductor G pole tensions clamper；Including：Resistance R7, resistance R8 and diode D11,
One end of resistance R7 is connected to the output end OUT of U1, and the other end of resistance R7 is connected to the grid of Q1, the negative electrode of diode D11
The output end OUT of U1 is connected to, the anode of diode D11 is connected to the source electrode of Q1, and resistance R8 is connected in parallel with diode D11.
Switch element 8 includes：Metal-oxide-semiconductor Q1, the grid of metal-oxide-semiconductor Q1 is connected to the output end of U1, metal-oxide-semiconductor Q1 by resistance R7
Drain electrode be connected to the anode of D7, the source electrode of metal-oxide-semiconductor Q1 is grounded by resistance R12.Metal-oxide-semiconductor Q1 is managed for N-MOS, by metal-oxide-semiconductor
Reverse-conducting, can discharge excess energy.
Optocoupler unit 9 includes：The first end of optocoupler PC1, optocoupler PC1 is connected to the negative electrode of U2, and second end of PC1 is connected to
Resistance R2's and resistance R5 is connected in series end.
First filter unit 10 includes：Diode D3, diode D6 and electric capacity C2；The anode of diode D6 is connected to ET1
The first secondary windings one end, used as output end GP_PWR+5V, the negative electrode of diode D6 is also by electricity for the negative electrode of diode D6
Hold C2 ground connection, diode D3 is connected in parallel with diode D6.
Second filter unit 11 includes：The anode of diode D8 and electric capacity C5, diode D8 is connected to the second subprime of ET1
One end of winding, used as output end CAN_PWR+5V, the negative electrode of diode D8 is also grounded the negative electrode of diode D8 by electric capacity C5.
Source of stable pressure 12 includes：Voltage-stabiliser tube U2, resistance R2, resistance R5, resistance R6 and resistance R9, the negative electrode of voltage-stabiliser tube U2 pass through
The resistance R5 and resistance R2 that are sequentially connected in series are connected to the negative electrode of D6；Resistance R6 and resistance R9 are sequentially connected in series the moon in D6
Between pole and ground, the plus earth of voltage-stabiliser tube U2, the control end of voltage-stabiliser tube U2 is connected to being connected in series for resistance R6 and resistance R9
End.
In the utility model, the pole of the Schottky two composition full-bridge of power input port D1, D2, D4, D5 works as power supply
DCINPUT1 is positive pole, and when DCINPUT2 is negative pole, current direction is DCINPUT1-D2-D4-DCINPUT2；Work as power supply
DCINPUT1 is negative pole, and when DCINPUT2 is positive pole, current direction is DCINPUT2-D5-D1-DCINPUT1；Protective tube F1 is left
End is always positive voltage, and input power is just connecing or reversal connection, and circuit board can normal work；When short circuit occurs in circuit, on F1
Electric current increases, and overcurrent protection is realized in blown fuse；When circuit is input into overvoltage, NTC resistance diminishes rapidly, and TVS pipe D9 is over the ground
Manifest short circuit, allow high pressure by protective tube F1 and then turned on over the ground by NTC and TVS pipe D9, overvoltage is realized in protective tube F1 fusing
Protection.
Wherein voltage stabilizing chip U1 can reach voltage stabilizing purpose using the chip of model UC3845 by automatic PWM,
Realize that Width funtion is input into：
(1) pin of UC3845 the 6th produce the PWM waveform of 50KHZ, the break-make of IRF540NMOS are controlled, in high frequency transformer ET1
Upper that interrupted high-frequency impulse is presented, by transformer coupled, there is pulsating volage in secondary transformer end；
(2) pulsating volage, by the filtering process of diode D3, D6 and C2, exports direct current all the way, and source of stable pressure TL431 exists
GP_PWR_5V ports stabilization output+5V (V=2.5* (1+R6/R9))；
(3) when output voltage has fluctuation, optocoupler PC1 feedback voltages difference is realized negative anti-to the COMP ports of UC3845
Feedback；
(4) after another group of output at secondary transformer end is through D8 and C5 filtering process ,+5V the voltages for being converted to isolation are defeated
Go out；
(5) L1 is common mode inductance, suppresses the common-mode voltage of outside output end；R1, C1, D7 are returned for the electric discharge of primary
Road, prevents transformer magnetic saturation, protects NMOS not punctured by transformer counter electromotive force；
(6) R7, R8, D11 provide protection for the G poles of IRF540, limit G pole tensions；
In the utility model, differentiation that input power port is nonpolarity, and overvoltage protection, overcurrent protection and perseverance can be realized
Fixed isolated DC output, extraneous Communication Jamming does not interfere with the normal work of circuit system.
As it will be easily appreciated by one skilled in the art that preferred embodiment of the present utility model is the foregoing is only, not
It is used to limit the utility model, all any modifications made within spirit of the present utility model and principle, equivalent and changes
Enter, should be included within protection domain of the present utility model.
Claims (7)
1. a kind of fool proof insulating power supply circuit being applied on BMS, it is characterised in that including：Full bridge unit (1), overcurrent-overvoltage
Protection location (2), common mode inhibition unit (3), discharge loop (4), high frequency transformer (5), voltage regulation unit (6), voltage-limiting protection list
First (7), switch element (8), optocoupler unit (9), the first filter unit (10), the second filter unit (11) and source of stable pressure (12)；
With two inputs, the input of the over-current over-voltage protection unit (2) is connected to described full the full bridge unit (1)
The output end of bridge unit (1), the input of the common mode inhibition unit (3) is connected to the over-current over-voltage protection unit (2)
Output end, the first input end of the high frequency transformer (5) is connected to the output end of the common mode inhibition unit (3) and described puts
The output end of electrical circuit (4), it is first defeated that the input of first filter unit (10) is connected to the high frequency transformer (5)
Go out end, the input of the source of stable pressure (12) is connected to the output end of first filter unit (10), the optocoupler unit (9)
Input be connected to the output end of the source of stable pressure (12), the first input end of the voltage regulation unit (6) is connected to the light
The output end of coupling unit (9), it is the 3rd defeated that the second input of the voltage regulation unit (6) is connected to the high frequency transformer (5)
Go out end, the input of the voltage-limiting protection unit (7) is connected to the output end of the voltage regulation unit (6), the switch element (8)
Input be connected to the output end of the voltage-limiting protection unit (7), the input of the discharge loop (4) is connected to described opening
The output end of unit (8) is closed, the second input of the high frequency transformer (5) is connected to the output end of the switch element (8),
The input of second filter unit (11) is connected to the second output end of the high frequency transformer (5).
2. fool proof insulating power supply circuit as claimed in claim 1, it is characterised in that the full bridge unit (1) includes：Diode
D1, diode D2, diode D4 and diode D5；
The plus earth of the anode of the diode D1 and the diode D4, the negative electrode and the diode of the diode D1
As the first input end DC_INPUT1 of the full bridge unit (1) after the negative electrode connection of D2；The negative electrode of the diode D4 and institute
State diode D5 negative electrode connection after as full bridge unit (1) the second input DC_INPUT2；The negative electrode of the diode D2
With the output end after the negative electrode connection of the diode D5 as full bridge unit (1).
3. fool proof insulating power supply circuit as claimed in claim 1 or 2, it is characterised in that the over-current over-voltage protection unit (2)
Including：Fuse F1, thermistor NTC and diode D9；
One end of the fuse F1 as the over-current over-voltage protection unit (2) input, the fuse F1's is another
Hold as the output end of the over-current over-voltage protection unit (2)；The thermistor NTC is connected to the another of the fuse F1
Between end and ground；The negative electrode of the diode D9 is connected to the other end of the fuse F1, and the anode of the diode D9 connects
Ground.
4. fool proof insulating power supply circuit as claimed in claim 1, it is characterised in that the common mode inhibition unit (3) includes：Altogether
Mould inductance L1, electric capacity C3 and electric capacity C4；
The common mode inductance L1 includes the first winding and the second winding, and the Same Name of Ends of the first winding is used as common mode inhibition unit (3)
Input, the different name end of the first winding as common mode inhibition unit (3) output end, the Same Name of Ends of the second winding and different name end
It is grounded, the electric capacity C4 is connected between the Same Name of Ends of the Same Name of Ends of the first winding and the second winding；The electric capacity C3 and institute
State electric capacity C4 in parallel.
5. fool proof insulating power supply circuit as claimed in claim 1, it is characterised in that the voltage regulation unit (6) includes：Voltage stabilizing core
Piece U1 and its peripheral circuit；
The COMP ends of the voltage stabilizing chip U1 are connected to the 3rd end of optocoupler PC1, the Vref ends of voltage stabilizing chip U1 by resistance R11
The 3rd end of PC1 is connected to by the resistance R4 and resistance R13 that are sequentially connected in series, resistance R4's and resistance R13 is connected in series
End is connected to the RT/CT ends of voltage stabilizing chip U1, and the RT/CT ends of voltage stabilizing chip U1 are also grounded by electric capacity C7；Voltage stabilizing chip U1's
VFB is grounded, and the Isense ends of voltage stabilizing chip U1 are grounded by electric capacity C8, and the Isense ends of voltage stabilizing chip U1 are also by being sequentially connected in series
Resistance R10 and resistance the R12 ground connection of connection；The anode of diode D10 is connected to one end of second armature winding of ET1, two poles
The negative electrode of pipe D10 is grounded by electric capacity C6；The negative electrode of diode D10 is additionally coupled to the Vi ends of U1.
6. fool proof insulating power supply circuit as claimed in claim 5, it is characterised in that switch element (8) includes：NMOS tube Q1,
The grid of the NMOS tube Q1 is connected to the output end of the voltage stabilizing chip U1, the leakage of the NMOS tube Q1 by the resistance R7
Pole is connected to the anode of diode D7, and the source electrode of the NMOS tube Q1 is grounded by resistance R12.
7. fool proof insulating power supply circuit as claimed in claim 6, it is characterised in that the voltage-limiting protection unit (7) includes：Electricity
Resistance R7, resistance R8 and diode D11；
One end of the resistance R7 is connected to the output end OUT of the voltage stabilizing chip U1, and the other end of the resistance R7 is connected to
The grid of NMOS tube Q1, the negative electrode of the diode D11 is connected to the output end OUT of the voltage stabilizing chip U1, the diode
The anode of D11 is connected to the source electrode of the NMOS tube Q1, and the resistance R8 is connected in parallel with the diode D11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621183078.2U CN206294067U (en) | 2016-11-03 | 2016-11-03 | A kind of fool proof insulating power supply circuit being applied on BMS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621183078.2U CN206294067U (en) | 2016-11-03 | 2016-11-03 | A kind of fool proof insulating power supply circuit being applied on BMS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206294067U true CN206294067U (en) | 2017-06-30 |
Family
ID=59099855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621183078.2U Active CN206294067U (en) | 2016-11-03 | 2016-11-03 | A kind of fool proof insulating power supply circuit being applied on BMS |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206294067U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107425740A (en) * | 2017-09-22 | 2017-12-01 | 武汉盛帆电子股份有限公司 | A kind of high pressure apparent source and high pressure gauge |
| CN108169663A (en) * | 2017-12-28 | 2018-06-15 | 湖南国科微电子股份有限公司 | A kind of pcb board with fool proof debugging interface |
-
2016
- 2016-11-03 CN CN201621183078.2U patent/CN206294067U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107425740A (en) * | 2017-09-22 | 2017-12-01 | 武汉盛帆电子股份有限公司 | A kind of high pressure apparent source and high pressure gauge |
| CN108169663A (en) * | 2017-12-28 | 2018-06-15 | 湖南国科微电子股份有限公司 | A kind of pcb board with fool proof debugging interface |
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