CN108988622B - A kind of active discharge control circuit and automobile - Google Patents
A kind of active discharge control circuit and automobile Download PDFInfo
- Publication number
- CN108988622B CN108988622B CN201810940555.2A CN201810940555A CN108988622B CN 108988622 B CN108988622 B CN 108988622B CN 201810940555 A CN201810940555 A CN 201810940555A CN 108988622 B CN108988622 B CN 108988622B
- Authority
- CN
- China
- Prior art keywords
- circuit
- discharge
- resistance
- sub
- connect
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/322—Means for rapidly discharging a capacitor of the converter for protecting electrical components or for preventing electrical shock
Abstract
The present invention provides a kind of active discharge control circuit and automobile, including charge control sub-circuit, energy storage sub-circuit, control of discharge sub-circuit and electric discharge sub-circuit, wherein, the output end of the charge control sub-circuit is connect with the energy storage sub-circuit, the charge control sub-circuit is used to receive discharge signal by its input terminal, and the input terminal after receiving the discharge signal by the output end for the energy storage sub-circuit provides charging signals, to charge to the energy storage sub-circuit, to promote the voltage of the output end of the energy storage sub-circuit；The control of discharge sub-circuit is connect with the output end of the energy storage sub-circuit, and the voltage for the output end in the energy storage sub-circuit exports discharge control signal to the electric discharge sub-circuit after being greater than predetermined reference voltage；The electric discharge sub-circuit is used for the control after receiving the discharge control signal and treats electric discharge device and discharge.In this way, the safety of active discharge control circuit can be improved.
Description
Technical field
The present invention relates to automobile technical field more particularly to a kind of active discharge control circuit and automobiles.
Background technique
In order to guarantee personal safety, during electric car electricity under parking, need to micro-control unit
(Microcontroller Unit, abbreviation MCU) carries out active discharge, and requirements of the national standard is stored in electric machine controller
Charge in DC_LINK discharges completely in 3ms.Currently, industry mostly uses greatly software control insulated gate bipolar transistor
(Insulated Gate Bipolar Transistor, abbreviation IGBT) switch completes electric discharge by the method for machine winding.So
And software is needed to be accurately controlled in this way, the risk for burning IGBT is otherwise had, additionally will cause motor
Fever.The current method for carrying out active discharge to electric car MCU, safety are poor as a result,.
Summary of the invention
The embodiment of the present invention is designed to provide a kind of active discharge control circuit and automobile, solves current to electricity
The method that electrical automobile MCU carries out active discharge, the poor problem of safety.
In order to achieve the above object, the embodiment of the present invention provides a kind of active discharge control circuit, including charge control sub-circuit,
Energy storage sub-circuit, control of discharge sub-circuit and electric discharge sub-circuit, wherein
The output end of the charge control sub-circuit is connect with the energy storage sub-circuit, and the charge control sub-circuit is used for
Discharge signal is received by its input terminal, and is the energy storage electricity by the output end after receiving the discharge signal
The input terminal on road provides charging signals, to charge to the energy storage sub-circuit, to promote the output end of the energy storage sub-circuit
Voltage；
The control of discharge sub-circuit is connect with the output end of the energy storage sub-circuit, in the energy storage sub-circuit
The voltage of output end exports discharge control signal to the electric discharge sub-circuit after being greater than predetermined reference voltage；
The electric discharge sub-circuit is used for the control after receiving the discharge control signal and treats electric discharge device and discharge.
Optionally, the energy storage sub-circuit includes output resistance and storage capacitance；
The first end of the output resistance is connect with the output end of the charge control sub-circuit, and the of the output resistance
Two ends are connect with the input terminal of the control of discharge sub-circuit；
The first end of the storage capacitance is connect with the second end of the output resistance, the second end of the storage capacitance with
The connection of first voltage end；
The first end of the output resistance is the input terminal of the energy storage sub-circuit, and the first end of the storage capacitance is institute
State the output end of energy storage sub-circuit.
Optionally, the control of discharge sub-circuit includes comparison module and control of discharge module, wherein
The first input end of the comparison module is connect with the output end of the energy storage sub-circuit, and the of the comparison module
Two input terminals access the predetermined reference voltage, voltage of the comparison module for the output end of the energy storage sub-circuit
With the predetermined reference voltage, and when the voltage for the output end that compare to obtain the energy storage sub-circuit is greater than the predetermined benchmark electricity
When pressure, Xiang Suoshu control of discharge module sends discharge voltage signal；
The control of discharge module is used for after receiving the discharge voltage signal, generates the discharge control signal.
Optionally, the comparison module includes that Comparative sub-module and predetermined reference voltage generate submodule；
The Comparative sub-module includes comparator, pull-up resistor and the first filter capacitor；
The predetermined reference voltage generates submodule for generating the predetermined reference voltage, and the predetermined benchmark is electric
Pressure is sent to the normal phase input end of the comparator；
The negative-phase input of the comparator is connect with the output end of the energy storage sub-circuit, the output end of the comparator
For exporting the discharge voltage signal；
The positive electricity source pin of the comparator is connect with power voltage terminal, the negative electricity source pin ground connection of the comparator；
The pull-up resistor is connected between the power voltage terminal and the output end of the comparator, first filtering
The first end of capacitor is connect with the power voltage terminal, the second end ground connection of first filter capacitor.
Optionally, the predetermined reference voltage generate submodule include the first divider resistance (R6), the second divider resistance and
Second filter capacitor；
The first end of first divider resistance is connect with power voltage terminal, the second end of first divider resistance and institute
State the normal phase input end connection of comparator；
The first end of second divider resistance is connect with the negative-phase input of the comparator, second divider resistance
Second end connect with second voltage end；
The first end of second filter capacitor is connect with the first end of second divider resistance, second filtered electrical
The second end of appearance is connect with the second end of second divider resistance.
Optionally, the discharge voltage signal is high voltage signal；
The control of discharge module includes and door；
Described to connect with the first input end of door with the output end of the comparator, second input terminal with door accesses
High voltage signal, the output end with door are used to export the discharge control signal.
Optionally, the control of discharge module further include the first input resistance, the second input resistance, third input resistance,
Filter resistance, the first pull down resistor and third filter capacitor；
It is described to be connect by first input resistance with the output end of the comparator with the first input end of door, it is described
The high voltage signal is accessed by second input resistance with the second input terminal of door, described and door the second input terminal is also
It is grounded by the third input resistance；
The first end of the filter resistance is connect with described with the output end of door, and the second end of the filter resistance is for defeated
The discharge control signal out；
The first end of first pull down resistor is connect with described with the output end of door, and the second of first pull down resistor
End ground connection；
The first end of the third filter capacitor is connect with the second end of the filter resistance, the third filter capacitor
Second end ground connection.
Optionally, the electric discharge sub-circuit includes:
Photo-coupler, zener diode, counnter attack diode, the first field-effect tube, the second field-effect tube, optocoupler current limliting electricity
Resistance, the first driving resistance, the second driving resistance, the second pull down resistor, discharge resistance and N number of diode current-limiting resistance, the N are
Positive integer；
Wherein, first input pin for being connected to the photo-coupler through the filter resistance with door output end,
The second input pin ground connection of the photo-coupler, the first output pin of the photo-coupler and the optocoupler current-limiting resistance
One end connection, the other end of the optocoupler current-limiting resistance respectively with the source electrode of first field-effect tube, the counnter attack diode
Cathode and the zener diode cathode connection, the photo-coupler the second output pin ground connection, described first
The grid of effect pipe is connected to the first output pin of the photo-coupler, first field-effect through the first driving resistance
The drain electrode of pipe is connected to the grid of second field-effect tube, one end of second pull down resistor through the second driving resistance
It is connected with the grid of second field-effect tube, the other end ground connection of second pull down resistor, second field-effect tube
Drain electrode is connected with one end of the discharge resistance, and the discharge end of the other end of the discharge resistance and the device to be discharged connects
It connects, the source electrode ground connection of second field-effect tube, the discharge end of the anode of the counnter attack diode and the device to be discharged connects
It connects, and is connected with N number of diode between the anode of the counnter attack diode and the discharge end of the device to be discharged in turn
Current-limiting resistance, the plus earth of the zener diode.
Optionally, the charge control sub-circuit includes the chip of model SN74LV4T125.
The embodiment of the present invention also provides a kind of automobile, including active discharge control circuit provided in an embodiment of the present invention.
In the embodiment of the present invention, by defeated after so that the voltage of output end of the energy storage sub-circuit is greater than predetermined reference voltage
Discharge control signal is to the electric discharge sub-circuit out, and the electric discharge sub-circuit controls after receiving the discharge control signal
Electric discharge device is treated to discharge；The discharge prevention in this manner it is achieved that hardware is delayed, and can occur to avoid due to software control
Hardware caused by mistake is burnt, to improve safety.
Detailed description of the invention
Fig. 1 is a kind of structure chart of active discharge control circuit provided in an embodiment of the present invention；
Fig. 2 is the structure chart of another active discharge control circuit provided in an embodiment of the present invention；
Fig. 3 is the structure chart of control of discharge sub-circuit provided in an embodiment of the present invention；
Fig. 4 is the structure chart of electric discharge sub-circuit provided in an embodiment of the present invention；
Fig. 5 is the structure chart of charge control sub-circuit provided in an embodiment of the present invention.
Specific embodiment
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.
As shown in Figure 1, the embodiment of the present invention provides a kind of active discharge control circuit, including charge control sub-circuit 1, storage
Energy sub-circuit 2, control of discharge sub-circuit 3 and electric discharge sub-circuit 4, wherein
The output end of the charge control sub-circuit 1 is connect with the energy storage sub-circuit 2, the charge control sub-circuit 1
It is the energy storage by the output end for receiving discharge signal by its input terminal, and after receiving the discharge signal
The input terminal of sub-circuit 2 provides charging signals, to charge to the energy storage sub-circuit 2, to promote the energy storage sub-circuit 2
The voltage of output end；
The control of discharge sub-circuit 3 is connect with the output end of the energy storage sub-circuit 2, in the energy storage sub-circuit
The voltage of 2 output end exports discharge control signal to the electric discharge sub-circuit 4 after being greater than predetermined reference voltage；
The electric discharge sub-circuit 4 is used for the control after receiving the discharge control signal and treats electric discharge device 5 and put
Electricity.
In the embodiment of the present invention, the function of the charge control sub-circuit 1 is mainly used for receiving discharge signal and sending
Charging signals are mainly completed by shaping chip, such as can be the chip of model SN74LV1T34 or SN74LV4T125.
Wherein, the discharge signal can be the high level letter that active discharge control circuit is issued by master control borad to driving plate
Number.In addition, the device to be discharged 5 can be the bus capacitor etc. of electric car MCU, to this and with no restriction.
The energy storage sub-circuit 2 can charge according to the charging signals, the energy storage sub-circuit is gradually increased
Output end voltage, and the voltage of the output end of the energy storage sub-circuit 2 is only exported and is put after being greater than predetermined reference voltage
Electric control signal to the electric discharge sub-circuit 4, thus the size of the voltage signal can determine the electric discharge sub-circuit electric discharge with
It is no；Wherein, the energy storage sub-circuit can be is completed by RC circuit.And the control of discharge sub-circuit 3 is mainly used for basis
It is controlled whether the discharge control signal is to the electric discharge of the device to be discharged.
The embodiment of the present invention, by defeated after making the voltage of output end of the energy storage sub-circuit 2 be greater than predetermined reference voltage
Discharge control signal is to the electric discharge sub-circuit 4 out, and the electric discharge sub-circuit 4 is controlled after receiving the discharge control signal
System treats electric discharge device 5 and discharges；The discharge prevention in this manner it is achieved that hardware is delayed, and can be to avoid due to software control
Hardware caused by going wrong is burnt, to improve safety.
Optionally, as shown in Fig. 2, on the basis of embodiment shown in Fig. 1, the energy storage sub-circuit 2 includes output electricity
Hinder R1 and storage capacitance C1；
The first end of the output resistance R1 is connect with the output end of the charge control sub-circuit 1, the output resistance
The second end of R1 is connect with the input terminal of the control of discharge sub-circuit 3；
The first end of the storage capacitance C1 is connect with the second end of the output resistance R1, and the of the storage capacitance C1
Two ends are connect with first voltage end；
The first end of the output resistance R1 be the energy storage sub-circuit 2 input terminal, the first of the storage capacitance C1
End is the output end of the energy storage sub-circuit 2.In the embodiment shown in Figure 2, first voltage end is ground terminal.
In present embodiment, the first voltage end is fixed voltage end, such as can be ground terminal, or may be it
His voltage end, to this and with no restriction.The working principle of the energy storage sub-circuit 2 may is that when the discharge signal is 5v
Start to start, be charged by the output resistance R1 to storage capacitance C1, to make the first end of the storage capacitance C1
Voltage gradually rise.And since standard requirements realize that dc-link capacitance drops to 60V hereinafter, passing through theory in 500ms
Calculating needs to choose C2=10uF, R2=50K；But due to the not no resistance of 50K in practice, R2 can be chosen for
The resistance of 56K.
In this way, the time of delay can be determined by the selection to the output resistance R1 and storage capacitance C1, so as to
Effectively to control the active discharge time, to meet technical requirements.
Optionally, as shown in Fig. 2, on the basis of embodiment shown in Fig. 1, the control of discharge sub-circuit 3 include than
Compared with module 31 and control of discharge module 32, wherein
The first input end of the comparison module 31 is connect with the output end of the energy storage sub-circuit 1, the comparison module
31 the second input terminal accesses predetermined reference voltage Vref, and the comparison module 31 is defeated for the energy storage sub-circuit 1
The voltage of outlet and the predetermined reference voltage Vref, and when the voltage for the output end for comparing to obtain the energy storage sub-circuit 1 is big
When the predetermined reference voltage Vref, Xiang Suoshu control of discharge module 32 sends discharge voltage signal；
The control of discharge module 32 is used for after receiving the discharge voltage signal, generates the control of discharge letter
Number.
In present embodiment, the comparison module 31 may include voltage comparator, to be exported by voltage comparator
Required voltage signal；Certain comparison module 31 can also include other components, to this and with no restriction.The predetermined benchmark
Voltage Vref can be 3V, can specifically be obtained by electric resistance partial pressure.And the discharge voltage signal can be high voltage signal.
In addition, the function of the control of discharge module 32 can be and be completed by logic gate, such as with door etc., to this and with no restriction.
In this way, may be implemented to generate the control of discharge letter by the cooperation of the comparison module 31 and the control of discharge module 32
Number.
Optionally, as shown in Figures 2 and 3, the comparison module 31 includes that Comparative sub-module 311 and predetermined reference voltage are raw
At submodule 312；
The Comparative sub-module 311 includes comparator U1, pull-up resistor R2 and the first filter capacitor C2；
The predetermined reference voltage generates submodule 312 for generating the predetermined reference voltage, and by the predetermined base
Quasi- voltage is sent to the normal phase input end of the comparator U1；
The negative-phase input of the comparator U1 is connect with the output end of the energy storage sub-circuit 1, the comparator U1's
Output end is for exporting the discharge voltage signal；
The positive electricity source pin of the comparator U1 is connect with power voltage terminal, and the negative electricity source pin of the comparator U1 connects
Ground；
The pull-up resistor R2 is connected between the power voltage terminal and the output end of the comparator U1, and described first
The first end of filter capacitor C2 is connect with the power voltage terminal, the second end ground connection of the first filter capacitor C2.
In present embodiment, the negative-phase input of the comparator U1 can be to be connected with the first end of the storage capacitance C1
It connects.In addition, the comparator U1 can be voltage comparator, model can be LMV331, to model and be not construed as limiting, the electricity
Source voltage can be 5V；The pull-up resistor R2 preferably can choose the resistance that resistance is 5.1k, in addition, the pull-up resistor
R2 can also play the role of stable level and current limliting in addition to improving the driving capability of output end of the comparator U1.And
The first filter capacitor C2 primarily serves the effect of smooth electric current.
The working principle of the comparator U1 is: since the charge control sub-circuit 1 is believed to the voltage of negative-phase input
It number constantly changes, and that the access of the normal phase input end of the comparator U1 is the predetermined reference voltage Vref, then when
When the predetermined reference voltage Vref of normal phase input end access is higher than the voltage signal of negative-phase input, the comparator U1 is defeated
It is out high level, when the predetermined reference voltage Vref of normal phase input end access is lower than the voltage signal of negative-phase input,
The comparator U1 output is low level.
In this way, use can be exported by the cooperation that the comparator U1 and the predetermined reference voltage generate submodule 312
In the discharge voltage signal of control electric discharge.
Optionally, as shown in figure 3, it includes the first divider resistance R3, second that the predetermined reference voltage, which generates submodule 312,
Divider resistance R4 and the second filter capacitor C3；
The first end of the first divider resistance R3 is connect with power voltage terminal, the second end of the first divider resistance R3
It is connect with the normal phase input end of the comparator U1；
The first end of the second divider resistance R4 is connect with the negative-phase input of the comparator U1, second partial pressure
The second end of resistance R4 is connect with second voltage end；
The first end of the second filter capacitor C3 is connect with the first end of the second divider resistance R4, second filter
The second end of wave capacitor C3 is connect with the second end of the second divider resistance R4.
Wherein, the second voltage end is a fixed voltage end, such as can be ground terminal, or may be other voltages
End, to this and with no restriction.It is selected by the resistance value to the first divider resistance R3 and the second divider resistance R4
It selects, available desired reference voltage.
In this way, by the first divider resistance R3, the second divider resistance R4 and the second filter capacitor C3, it can
To provide the more stable predetermined reference voltage Vref.
Optionally, as shown in figure 3, the discharge voltage signal is high voltage signal；
The control of discharge module 32 includes and door Q1；
It is described to be connect with the first input end of door Q1 with the output end of the comparator U1, second input with door Q1
It terminates into high voltage signal, the output end with door Q1 is used to export the discharge control signal.
In present embodiment, the high voltage signal that second input terminal with door Q1 accesses can be the charge control
The signal that sub-circuit 1 exports；It is described to be connect by R8 with the electric discharge sub-circuit 4 with the output end of door Q1.
The working principle with door Q1 is: if the predetermined reference voltage of the normal phase input end of the comparator U1 is higher than it
The voltage signal of negative-phase input, then the discharge voltage signal that the output end of the comparator U1 exports, i.e., described and door
The signal of the first input end of Q1 is high voltage signal, and if the signal with the second input terminal of door Q1 is also high voltage letter
Number, then described output HIGH voltage signal with door Q1, i.e., the described discharge control signal, active discharge function is in work shape at this time
State.The voltage for the output end that will gradually promote the energy storage sub-circuit 2 further, since the energy storage sub-circuit 2 charges, when described
The voltage of the output end of energy storage sub-circuit 2, i.e., the voltage signal of the negative-phase input of the described comparator U1 are promoted described to being greater than
When the predetermined reference voltage of the normal phase input end of comparator U1, the comparator U1 will export low level signal, then, it is described
The discharge control signal will not be exported with door Q1, active discharge function is in off position at this time.And this section is by filling
Electricity is by the voltage increase of the output end of the energy storage sub-circuit 2 to the predetermined benchmark of the normal phase input end greater than the comparator U1
The time of voltage is discharge time；In this way, described may be implemented hardware encryption with door Q1 and the comparator U1.It is described
It can be specifically as follows: with the logic of door Q1
In this way, the discharge voltage signal is high voltage signal, the second input terminal access high voltage letter with door Q1
Number, described and door Q1 can be made to export the discharge control signal to control the electric discharge sub-circuit to the device 5 to be discharged
It discharges.
Optionally, as shown in figure 3, the control of discharge module 32 further includes the first input resistance R5, the second input resistance
R6, third input resistance R7, filter resistance R8, the first pull down resistor R9 and third filter capacitor C4；
The first input end with door Q1 is connected by the output end of the first input resistance R5 and comparator U1
It connects, second input terminal with door Q1 accesses the high voltage signal, described and door Q1 by the second input resistance R6
The second input terminal also pass through the third input resistance R7 be grounded；
The first end of the filter resistance R8 is connect with the output end with door Q1, the second end of the filter resistance C4
For exporting the discharge control signal；
The first end of the first pull down resistor R9 is connect with the output end with door Q1, the first pull down resistor R9
Second end ground connection；
The first end of the third filter capacitor C4 is connect with the second end of the filter resistance R8, the third filtered electrical
Hold the second end ground connection of C4.
Wherein, described to be connect with the power pins of door Q1 with the supply voltage, described and door Q1 and the supply voltage
Between can connect first and door filter capacitor C5 and second and door filter capacitor C6, described first can with door filter capacitor C5
To be 100nf, described second can be 15V with door filter capacitor C6.
In this way, the output discharge control signal that can be more stable with door Q1 output end.
Optionally, as shown in figure 4, the electric discharge sub-circuit 4 includes:
Photo-coupler U2, zener diode D1, counnter attack diode D2, the first field-effect tube Q2, the second field-effect tube Q3, light
Coupling current-limiting resistance R10, the first driving resistance R11, the second driving resistance R12, the second pull down resistor R13, discharge resistance R14 and N
A diode current-limiting resistance R15, the N are positive integer；
Wherein, the first input that the output end with door is connected to the photo-coupler U2 through the filter resistance is drawn
Foot, the second input pin ground connection of the photo-coupler U2, the first output pin of the photo-coupler U2 and optocoupler limit
One end of leakage resistance R10 connects, the other end of the optocoupler current-limiting resistance R10 source with the first field-effect tube Q2 respectively
The cathode of pole, the cathode of the counnter attack diode D2 and the zener diode D1 connects, and the second of the photo-coupler U2
The grid of output pin ground connection, the first field-effect tube Q2 is connected to the photo-coupler through the first driving resistance R11
The drain electrode of the first output pin of U2, the first field-effect tube Q2 is connected to described second through the second driving resistance R12
The grid of field-effect tube Q3, one end of the second pull down resistor R13 is connected with the grid of the second field-effect tube Q3, described
The other end of second pull down resistor R13 is grounded, and the drain electrode of the second field-effect tube Q3 and one end of the discharge resistance R14 connect
It connects, the other end of the discharge resistance R14 is connected with the discharge end of the device 5 to be discharged, the second field-effect tube Q3's
Source electrode ground connection, the anode of the counnter attack diode D2 is connected with the discharge end of the device 5 to be discharged, and the counnter attack diode
It is connected with N number of diode current-limiting resistance, the pressure stabilizing between the anode of D2 and the discharge end of the device to be discharged 5 in turn
The plus earth of diode D1.
Wherein, the photo-coupler U2 can guarantee high and low voltage isolation, and can control the first field-effect tube Q2
Open shutdown, and then control the second field-effect tube Q3 opens shutdown, to determine whether the device to be discharged 5 leads to
The discharge resistance R14 is crossed to discharge.
Preferably, the electric discharge sub-circuit 4 further includes electric discharge absorption resistance R16 and electric discharge Absorption Capacitance C7；
One end of the electric discharge absorption resistance R16 is connected with the drain electrode of the second field-effect tube Q3, and the electric discharge absorbs
The other end of resistance R16 is connected with one end of the electric discharge Absorption Capacitance C7, the other end of the electric discharge Absorption Capacitance C7 and institute
State the source electrode connection of the second field-effect tube Q3.Power electronic devices can be improved in this way turns on and off the electricity that the moment is born
Pressure.
Preferably, the electric discharge sub-circuit 4 further includes first diode filter capacitor C8, the second diode filter capacitor C9
With driving capacitor C10；
The cathode that the zener diode D1 is distinguished at the both ends of the first diode filter capacitor C8 is connected with anode, institute
The both ends for stating the second diode filter capacitor C9 are distinguished the cathode of the zener diode D1 and are connected with anode, the driving capacitor
The both ends of C10 are connected with one end of one end of the second driving resistance R12 and the second pull down resistor R13 respectively.
N number of diode current-limiting resistance R15 is mainly used for current limliting, otherwise will have burn the zener diode D1,
The danger of the components such as the counnter attack diode D2.Preferably, N number of diode current-limiting resistance R15 can be 8 resistance values
For the resistance of 75k.
In this way, the high pressure of the active discharge control circuit can be made to be effectively isolated with low pressure, to further increase institute
State the safety of active discharge control circuit.
Optionally, as shown in figure 5, the charge control sub-circuit 1 includes the chip U3 of model SN74LV4T125；
The the first input pin 1A and the second input pin 2A of the chip U3 respectively with the letter for issuing discharge signal
The connection of number sending module, the enabled pin OE3 and OE4 of the first of the chip U3 are grounded respectively, the power pins of the chip U3
VCC is connected with tertiary voltage end, and the first grounding pin EP and the second grounding pin GND of the chip U3 is grounded respectively, described
The first output pin 3Y of chip U3 is connected with the first end of the output resistance R1, the first output pin 4Y of the chip U3
It is connect with described with the second input terminal of door Q1；
In this way, the signal that the charge control sub-circuit can be made to provide is more stable.
Preferably, the charge control sub-circuit 1 can also include chip pull down resistor R17 and power filtering capacitor C11,
The both ends of the pull down resistor R17 are connect with signal transmitting module and ground terminal respectively, the power filtering capacitor C11 respectively with
The power pins VCC and ground terminal of the chip U3 is connected.
The embodiment of the present invention also provides a kind of automobile, including active discharge control circuit provided in an embodiment of the present invention；This
Sample, may be implemented hardware delay discharge prevention, and can to avoid being gone wrong due to software control caused by hardware burn, from
And improve safety.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, it can also make several improvements and retouch, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (9)
1. a kind of active discharge control circuit, which is characterized in that including charge control sub-circuit, energy storage sub-circuit, control of discharge
Sub-circuit and electric discharge sub-circuit, wherein
The output end of the charge control sub-circuit is connect with the energy storage sub-circuit, and the charge control sub-circuit is for passing through
Its input terminal receives discharge signal, and is the energy storage sub-circuit by the output end after receiving the discharge signal
Input terminal provides charging signals, to charge to the energy storage sub-circuit, to promote the electricity of the output end of the energy storage sub-circuit
Pressure；
The control of discharge sub-circuit is connect with the output end of the energy storage sub-circuit, for the output in the energy storage sub-circuit
The voltage at end exports discharge control signal to the electric discharge sub-circuit after being greater than predetermined reference voltage；
The electric discharge sub-circuit is used for the control after receiving the discharge control signal and treats electric discharge device and discharge；
The control of discharge sub-circuit includes comparison module and control of discharge module, wherein
The first input end of the comparison module is connect with the output end of the energy storage sub-circuit, and the second of the comparison module is defeated
Enter to terminate into the predetermined reference voltage, voltage and institute of the comparison module for the output end of the energy storage sub-circuit
Predetermined reference voltage is stated, and when the voltage for the output end for comparing to obtain the energy storage sub-circuit is greater than the predetermined reference voltage
When, Xiang Suoshu control of discharge module sends discharge voltage signal；
The control of discharge module is used for after receiving the discharge voltage signal, generates the discharge control signal.
2. active discharge control circuit according to claim 1, which is characterized in that the energy storage sub-circuit includes output electricity
Resistance and storage capacitance；
The first end of the output resistance is connect with the output end of the charge control sub-circuit, the second end of the output resistance
It is connect with the input terminal of the control of discharge sub-circuit；
The first end of the storage capacitance is connect with the second end of the output resistance, the second end of the storage capacitance and first
Voltage end connection；
The first end of the output resistance is the input terminal of the energy storage sub-circuit, and the first end of the storage capacitance is the storage
The output end of energy sub-circuit.
3. active discharge control circuit as described in claim 1, which is characterized in that the comparison module includes Comparative sub-module
Submodule is generated with predetermined reference voltage；
The Comparative sub-module includes comparator, pull-up resistor and the first filter capacitor；
The predetermined reference voltage generates submodule for generating the predetermined reference voltage, and the predetermined reference voltage is passed
It send to the normal phase input end of the comparator；
The negative-phase input of the comparator is connect with the output end of the energy storage sub-circuit, and the output end of the comparator is used for
Export the discharge voltage signal；
The positive electricity source pin of the comparator is connect with power voltage terminal, the negative electricity source pin ground connection of the comparator；
The pull-up resistor is connected between the power voltage terminal and the output end of the comparator, first filter capacitor
First end connect with the power voltage terminal, the second end of first filter capacitor ground connection.
4. active discharge control circuit as claimed in claim 3, which is characterized in that the predetermined reference voltage generates submodule
Including the first divider resistance, the second divider resistance and the second filter capacitor；
The first end of first divider resistance is connect with power voltage terminal, the second end of first divider resistance and the ratio
Normal phase input end compared with device connects；
The first end of second divider resistance is connect with the negative-phase input of the comparator, and the of second divider resistance
Two ends are connect with second voltage end；
The first end of second filter capacitor is connect with the first end of second divider resistance, second filter capacitor
Second end is connect with the second end of second divider resistance.
5. the active discharge control circuit as described in any claim in Claims 1-4, which is characterized in that the electric discharge
Voltage signal is high voltage signal；
The control of discharge module includes and door；
It is described to be connect with the first input end of door with the output end of the comparator, the high electricity of the second input terminal access with door
Signal is pressed, the output end with door is used to export the discharge control signal.
6. active discharge control circuit as claimed in claim 5, which is characterized in that the control of discharge module further includes first
Input resistance, the second input resistance, third input resistance, filter resistance, the first pull down resistor and third filter capacitor；
It is described to be connect by first input resistance with the output end of the comparator with the first input end of door, described and door
The second input terminal the high voltage signal is accessed by second input resistance, second input terminal with door also passes through
The third input resistance ground connection；
The first end of the filter resistance is connect with described with the output end of door, and the second end of the filter resistance is for exporting institute
State discharge control signal；
The first end of first pull down resistor is connect with described with the output end of door, the second termination of first pull down resistor
Ground；
The first end of the third filter capacitor is connect with the second end of the filter resistance, and the second of the third filter capacitor
End ground connection.
7. active discharge control circuit as claimed in claim 6, which is characterized in that the electric discharge sub-circuit includes:
Photo-coupler, zener diode, counnter attack diode, the first field-effect tube, the second field-effect tube, optocoupler current-limiting resistance,
One driving resistance, the second driving resistance, the second pull down resistor, discharge resistance and N number of diode current-limiting resistance, the N are positive whole
Number；
Wherein, first input pin for being connected to the photo-coupler through the filter resistance with door output end, it is described
Second input pin of photo-coupler is grounded, one end of the first output pin of the photo-coupler and the optocoupler current-limiting resistance
Connection, the other end of the optocoupler current-limiting resistance yin with the source electrode of first field-effect tube, the counnter attack diode respectively
The connection of the cathode of pole and the zener diode, the second output pin ground connection of the photo-coupler, first field-effect
The grid of pipe is connected to the first output pin of the photo-coupler through the first driving resistance, first field-effect tube
Drain electrode is connected to the grid of second field-effect tube, one end of second pull down resistor and institute through the second driving resistance
State the grid connection of the second field-effect tube, the other end ground connection of second pull down resistor, the drain electrode of second field-effect tube
It is connected with one end of the discharge resistance, the other end of the discharge resistance is connected with the discharge end of the device to be discharged, institute
The source electrode ground connection of the second field-effect tube is stated, the anode of the counnter attack diode is connected with the discharge end of the device to be discharged, and
It is connected with N number of diode current limliting electricity between the anode of the counnter attack diode and the discharge end of the device to be discharged in turn
Resistance, the plus earth of the zener diode.
8. the active discharge control circuit as described in any claim in Claims 1-4, which is characterized in that the charging
Control sub-circuit includes the chip of model SN74LV4T125.
9. a kind of automobile, which is characterized in that including active discharge control circuit such as of any of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810940555.2A CN108988622B (en) | 2018-08-17 | 2018-08-17 | A kind of active discharge control circuit and automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810940555.2A CN108988622B (en) | 2018-08-17 | 2018-08-17 | A kind of active discharge control circuit and automobile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108988622A CN108988622A (en) | 2018-12-11 |
| CN108988622B true CN108988622B (en) | 2019-11-12 |
Family
ID=64554310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810940555.2A Active CN108988622B (en) | 2018-08-17 | 2018-08-17 | A kind of active discharge control circuit and automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108988622B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110228395A (en) * | 2019-06-14 | 2019-09-13 | 上海蔚来汽车有限公司 | Two-supply circuit system |
| WO2021142619A1 (en) * | 2020-01-14 | 2021-07-22 | 深圳欣锐科技股份有限公司 | Discharge control circuit, switching power supply, and discharge control device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103516187A (en) * | 2012-06-19 | 2014-01-15 | 立锜科技股份有限公司 | Bleeder circuit and method for reducing power consumption of electromagnetic interference filter |
| CN106787657A (en) * | 2016-12-29 | 2017-05-31 | 上海新时达电气股份有限公司 | Vehicle-mounted drive control device capacitor discharging circuit |
| CN206332610U (en) * | 2016-12-29 | 2017-07-14 | 上海新时达电气股份有限公司 | Vehicle-mounted drive control device capacitor discharging circuit |
-
2018
- 2018-08-17 CN CN201810940555.2A patent/CN108988622B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103516187A (en) * | 2012-06-19 | 2014-01-15 | 立锜科技股份有限公司 | Bleeder circuit and method for reducing power consumption of electromagnetic interference filter |
| CN106787657A (en) * | 2016-12-29 | 2017-05-31 | 上海新时达电气股份有限公司 | Vehicle-mounted drive control device capacitor discharging circuit |
| CN206332610U (en) * | 2016-12-29 | 2017-07-14 | 上海新时达电气股份有限公司 | Vehicle-mounted drive control device capacitor discharging circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108988622A (en) | 2018-12-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106786396B (en) | A kind of amendment wave inverter intelligent type protective switch of the short circuit circuit | |
| CN108988622B (en) | A kind of active discharge control circuit and automobile | |
| CN201405807Y (en) | Power supply circuit for whole vehicle controller of hybrid power bus | |
| CN106300314A (en) | The high voltage protective system and method for Type C interface chip CC pin | |
| CN110880737A (en) | Charging chip, overvoltage protection circuit thereof and portable electronic equipment | |
| CN104135142A (en) | Filter circuit of an asynchronous motor drive controller of an electric vehicle and method thereof | |
| CN207782762U (en) | A kind of automatic reset circuit and electronic product | |
| CN100508684C (en) | Electronic controller for large power gas discharge lamp | |
| CN203827170U (en) | Circuit device possessing frequency transformer soft startup circuit and energy consumption braking circuit | |
| CN114572029A (en) | Pre-charging device and power supply system | |
| CN109004620A (en) | A kind of IGBT current foldback circuit and air conditioner | |
| CN105406692A (en) | IGBT driving circuit | |
| CN107172733A (en) | A kind of electromagnetic heating system and its method of work | |
| CN209562148U (en) | A kind of IPM overcurrent and thermal-shutdown circuit | |
| CN107804253A (en) | A kind of Multifunctional relay control module | |
| CN104460362B (en) | Safety, which is powered, protects circuit system | |
| CN114844340B (en) | Alternating current wake-up circuit and energy storage power supply | |
| CN206850404U (en) | A kind of line under-voltage protection circuit with the input of retarding window wide scope | |
| CN217486660U (en) | Silicon controlled rectifier output control circuit | |
| CN109795429A (en) | A kind of Vehicle Controller power-supply system of discontinuous work | |
| CN106972461A (en) | A kind of line under-voltage protection circuit inputted with retarding window wide scope | |
| CN107931782B (en) | Arc ignition circuit and AC-DC argon arc welding machine | |
| CN219420738U (en) | Conduction emission suppression device for physiotherapy instrument | |
| CN215817911U (en) | Zero current switch direct current buck-boost circuit and integrated circuit thereof | |
| CN207321149U (en) | A kind of start-up circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |