CN109638920A - A kind of high pressure preliminary filling modular circuit for load storage energy capacitor - Google Patents
A kind of high pressure preliminary filling modular circuit for load storage energy capacitor Download PDFInfo
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- CN109638920A CN109638920A CN201811622364.8A CN201811622364A CN109638920A CN 109638920 A CN109638920 A CN 109638920A CN 201811622364 A CN201811622364 A CN 201811622364A CN 109638920 A CN109638920 A CN 109638920A
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- 239000003990 capacitor Substances 0.000 title claims abstract description 41
- 238000012544 monitoring process Methods 0.000 claims abstract description 29
- 230000005669 field effect Effects 0.000 claims description 35
- 239000003381 stabilizer Substances 0.000 claims description 23
- 230000002093 peripheral effect Effects 0.000 claims description 11
- 230000001681 protective effect Effects 0.000 claims description 11
- 230000000694 effects Effects 0.000 claims description 10
- 230000002441 reversible effect Effects 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 7
- 230000007257 malfunction Effects 0.000 abstract description 6
- 238000003745 diagnosis Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000002955 isolation Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 230000001934 delay Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 101100482117 Saimiri sciureus THBD gene Proteins 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
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- 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
- H02J7/007—Regulation of charging or discharging current or voltage
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- H02J7/0026—
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- 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
- H02J7/0036—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting 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
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
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- Power Engineering (AREA)
- Direct Current Feeding And Distribution (AREA)
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Abstract
The invention belongs to new-energy automobile high pressure recharge technique fields, more particularly to a kind of high pressure preliminary filling modular circuit for load storage energy capacitor, including connecting terminal, precharging circuit (120), the monitoring feed circuit (160) for monitoring precharging circuit (120) both ends pressure difference and the automatic discharge circuit (140) for controlling the electric discharge of load storage energy capacitor.There is the present invention high pressure preliminary filling modular circuit of more defencive functions, low cost, small size, high reliability monitor each Parameters variation to judge and be pre-charged completion or malfunction so that during preliminary filling；Have both the inverse functions such as active discharge of connecing fault diagnosis and protection, load storage energy capacitor again simultaneously.
Description
Technical field
The invention belongs to new-energy automobile high pressure recharge technique fields, and in particular to a kind of for load storage energy capacitor
High pressure preliminary filling modular circuit.
Background technique
The load of new-energy automobile high-power all has big capacity load energy storage filter capacitor, in cold start-up, load
Storage capacitor powers on the nearly 0V of crimping, if being directly closed current supply circuit high voltage connector at this time, contacts of contactor both end voltage reaches several
Hectovolt is special, and at most there was only tens milliohms under current supply line resistance and contacts of contactor contact resistance normal condition, powers this moment
System is equivalent to generation short circuit, and contacts of contactor moment can flow through thousands of or even up to ten thousand amperes of electric current, power supply system fuse
And high voltage connector must badly undoubtedly.Therefore the current supply circuit of such high-voltage load generally can all install high pressure preliminary filling module, high pressure
Power supply system preliminary work first passes through preliminary filling resistance and is pre-charged to load end high-voltage load storage capacitor, after the completion of waiting precharge,
High voltage connector short circuit high pressure preliminary filling switchs and preliminary filling resistance are used again, and load is normally started.After taking such measure, make
The dash current of starting moment substantially reduces.
For the judgement that precharge is completed, the prior art generally takes three kinds of control strategies:
The first is to carry out delays time to control to precharge, and the patent document if notification number is CN208078666U discloses a kind of input
Protecting against shock pre-charge circuit is powered on, relay switch in the prior art is replaced using NMOS tube Q1, is prolonged using delay capacitor E1
When NMOS tube Q1 open to reach DC-DC converter precharge, after delay, directly terminate precharge and closed high contact
Device；
Second method is monitoring preliminary filling electric current, as the patent document of Publication No. CN108879862A discloses a kind of power battery
The control method of charge monitoring system carries out real-time monitoring, such control program to the electric current of power battery each charging stage
In use, terminating preliminary filling and closed high contactor when preliminary filling electric current levels off to 0A；
The third is to sample and calculate voltage difference, such as Publication No. to the voltage AD at precharging circuit both ends respectively using microcontroller
The patent document of CN106696713A discloses a kind of electric automobile high-voltage preliminary filling control circuit and control method, such control program
It applies in preliminary filling control system, terminates preliminary filling process and closed high contactor when pressure difference levels off to 0V.
But the above prior art finds following defect in actual use:
Using the preliminary filling module of the first delays time to control, if short circuit occurs for load side electrical circuitry, or due to electrical source of power management
The problems such as system conformance, device stability, after specific pre-charging time, the DC bus at precharging circuit both ends is still deposited
In larger voltage difference, transient high-current impact risk is not eliminated, closed high contactor can still damage power supply system at this time；
And the scheme of second of sampling preliminary filling electric current is used, circuit structure is excessively complicated or uses current sensor higher cost；
The third carries out AD sampling to precharging circuit both end voltage respectively with microcontroller and calculates the method for pressure difference, control circuit
Complicated higher cost；Additionally due to the high-voltage relay of high pressure preliminary filling module, high-voltage great-current contactor act when can generate compared with
Big EMI interference signal, microcontroller in module is it some times happens that reset or malfunction.
Inverse fault diagnosis defencive function and load storage are connect in addition, not having usually in prior art mesohigh preliminary filling module
The automatic discharging function of energy capacitor brings inconvenience even to influence personal safety to installation maintenance personnel；In addition, existing skill
The pressure difference monitoring that art uses technological means is relative complex, higher cost.
Summary of the invention
In view of this, in view of the deficiencies of the prior art, it is an object of the present invention to provide a kind of for load storage energy capacitor
High pressure preliminary filling modular circuit, with more defencive functions, low cost, small size, high reliability high pressure preliminary filling modular circuit, make
It obtains during preliminary filling, each Parameters variation can be monitored to judge precharge completion or malfunction；Have both inverse connect again simultaneously
Fault diagnosis and protection, load storage energy capacitor the functions such as active discharge.
In order to achieve the above objectives, the invention adopts the following technical scheme:
A kind of high pressure preliminary filling modular circuit for load storage energy capacitor, including connecting terminal, precharging circuit, for monitoring preliminary filling
The monitoring feed circuit of circuit both ends pressure difference and the automatic discharge circuit to discharge for controlling load storage energy capacitor；
The connecting terminal includes high pressure preliminary filling switchs terminals, high pressure contact switch terminal, Pressure difference feedback terminals, low pressure
For electric connection terminal, high direct voltage positive input terminal, high direct voltage negative input end, high direct voltage positive output end and high direct voltage negative output
End, high direct voltage positive input terminal, high direct voltage negative input end connect external power supply, and high direct voltage positive output end and high direct voltage are negative
Output end connect load storage energy capacitor, high pressure preliminary filling switchs terminals, high pressure contact switch terminal, Pressure difference feedback terminals,
Low-voltage power supply terminals connect peripheral control unit；
The precharging circuit is connected between high direct voltage positive input terminal and high direct voltage positive output end, the precharging circuit it is defeated
Enter the first voltage input terminal of end connection monitoring feed circuit, the of the output end connection monitoring feed circuit of the precharging circuit
The output end of two voltage input ends, the monitoring feed circuit connects Pressure difference feedback terminals；Automatic discharge circuit is connected to directly
It flows between high pressure positive output end and high direct voltage negative output terminal.
Further, the monitoring feed circuit includes the 3rd resistor being sequentially connected in series, the 4th high-voltage relay, the first light
Coupling, the first voltage-stabiliser tube and third transistor, the primary side light-emitting diodes tube anode of the first optocoupler pass through the 4th high-voltage relay and the
Three resistance connect precharging circuit input terminal, the power supply coil of the 4th high-voltage relay be connected to high pressure preliminary filling switchs terminals with
Between low-voltage power supply terminals, the primary side light-emitting diodes tube cathode of the first optocoupler connects precharging circuit output end, the first optocoupler
Reverse parallel connection has the 4th diode, the secondary side of the first optocoupler between primary side light-emitting diodes tube anode and primary side light-emitting diodes tube cathode
Low-voltage power supply terminals, the pair of the first optocoupler are connected by the 4th resistance after the cathode of transistor collector the first voltage-stabiliser tube of connection
Side transistor emitter is grounded, and connects current limiting breaking circuit after the base stage of the anode connection third transistor of the first voltage-stabiliser tube,
The collector of third transistor connects low-voltage power supply terminals by twelfth resistor, and the collector of third transistor connects pressure difference
Feedback connection end, current limliting breaking circuit include the first triode and the 8th resistance, the collector connection the three or three of the first triode
The emitter of the base stage of pole pipe, the first triode is grounded, and is led to after the emitter of the base stage connection third transistor of the first triode
Cross the 8th resistance eutral grounding.
Further, the precharging circuit includes the in parallel first branch and second branch, the first branch include according to
Secondary concatenated inverse protection control module, the first high-voltage relay and first resistor, the second branch of connecing includes high pressure contact-making switch, the
The power supply coil of one high-voltage relay is connected between high pressure preliminary filling switchs terminals and low-voltage power supply terminals, and high pressure contact is opened
The power supply coil of pass is connected between high pressure contact switch terminal and low-voltage power supply terminals.
Further, the inverse protective module that connects is using the 7th diode.
Further, the inverse protective module that connects includes the first field-effect tube, the 9th diode, the second voltage-stabiliser tube, the 4th
Triode, thirteenth resistor, the tenth resistance and eleventh resistor, the 9th diode, the second voltage-stabiliser tube and thirteenth resistor are successively
It is connected between high direct voltage positive input terminal, high direct voltage negative input end, the D grade of the first field-effect tube and the pole S are connected on first
In branch, blanking voltage is accessed by eleventh resistor in the pole G of the first field-effect tube, and blanking voltage is greater than high direct voltage positive input
9~15V of input voltage is held, the base stage of the 4th triode is connected between the 30th resistance and the second voltage-stabiliser tube, the 4th triode
Emitter be connected between the 9th diode and the second voltage-stabiliser tube, the collecting field of the 4th triode connects the first effect pipe
The pole G, the emitter of the 4th triode connect the pole S of the first field-effect tube by the tenth resistance, and the pole D of the first field-effect tube passes through
First high-voltage relay connects high direct voltage positive output end with first resistor.
Further, the automatic discharge circuit includes concatenated third high-voltage relay and second resistance, third high pressure
The hot-wire coil of relay is separately connected high pressure preliminary filling switchs terminals by discharge control loop, high pressure contacts switch wire connection
End；The input terminal of the discharge control loop connects low-voltage power supply terminals, and the first input end of discharge control loop passes through the
Six resistance connect low-voltage power supply terminals, and the second input terminal of discharge control loop connects high pressure preliminary filling by the 5th diode and opens
Terminals are closed, the third input terminal of discharge control loop connects high pressure by the 6th diode and contacts switch terminal, electric discharge control
Circuit processed includes concatenated third high-voltage relay hot-wire coil, the second triode and the 7th resistance, and third high-voltage relay is logical
Electric coil connects low-voltage power supply terminals far from one end of the second triode, and the collector and base series of the second triode are the
Between three high-voltage relay coils and the 7th resistance, it is connected with filter capacitor between the base stage of the second triode and the 7th resistance,
It is grounded after the emitter of cathode the second triode of connection of filter capacitor.
Further, the automatic discharge circuit includes concatenated second field-effect tube and the second star resistance, second effect
Should pipe the pole G by discharge control loop be separately connected high pressure preliminary filling switchs terminals, high pressure contact switch terminal；It is described to put
The input terminal of electric control loop connects DC voltage, and DC voltage is greater than high direct voltage positive input terminal 9~15V of input voltage, institute
Stating discharge control loop includes concatenated 5th resistance, the second optocoupler and the 6th star resistance, the primary side light-emitting diodes of the second optocoupler
Tube anode connects the 6th star resistance, the primary side diode cathode connection Alcor diode of the second optocoupler and the 6th star diode,
The pole G of secondary side collector connection the 5th resistance and the second field-effect tube of second optocoupler, the secondary side triode current collection of the second optocoupler
Pole connects the pole S of the second field-effect tube by the 9th resistance, and the secondary side transistor emitter of the second optocoupler connects the second field-effect
The pole D of the pole S of pipe, the second field-effect tube connects high direct voltage positive output end by the second star resistance.
The beneficial effects of the present invention are:
1. high pressure preliminary filling modular circuit provided by the invention is realized using a kind of pressure differential detection feed circuit of lower cost
The monitoring and diagnosis of precharging circuit state, improve the reliability of high pressure preliminary filling module.
2. high pressure preliminary filling modular circuit provided by the invention is also provided simultaneously with inverse in addition to above-mentioned pressure difference monitors feedback function
Connect the diagnosis defencive function of failure and the automatic discharging function of load storage energy capacitor.
3. without using microcontroller in technical solution of the present invention, circuit function is not readily susceptible to module mesohigh high current
Relay or contactless contactor when working brought EMI noise influence, reliable operation and low in cost is suitble to push away on a large scale
Extensively.
Detailed description of the invention
Fig. 1 is the circuit block diagram of high pressure preliminary filling device proposed by the invention；
Fig. 2 is the circuit diagram of the embodiment of the present invention one；
Fig. 3 is the circuit diagram of automatic discharge circuit in the embodiment of the present invention two；
Fig. 4 is the inverse circuit diagram for connecing protective module in the embodiment of the present invention three；
Figure label: 100: high pressure preliminary filling device, 120: precharging circuit, 121: it is inverse to connect protective module, 140: automatic discharge circuit,
160: monitoring feed circuit, HV+_IN: high direct voltage positive input terminal, HV-_IN: high direct voltage negative input end, HV+_OUT: direct current
High pressure positive output end, HV-_OUT: high direct voltage negative output terminal, KZ1: high pressure preliminary filling switchs terminals, KZ2: high pressure contact-making switch
Terminals, FB: Pressure difference feedback terminals, LV+: low-voltage power supply terminals, GND: DC low-voltage ground terminal, the K1: the first high pressure after
Electric appliance, K2: high pressure contact-making switch, K3: third high-voltage relay, the K4: the four high-voltage relay, R1: first resistor, R2: the second
Resistance, the R2*: the second star resistance, R3: 3rd resistor, the R4: the four resistance, the R5: the five resistance, the R6: the six resistance, R6*: the six
Star resistance, the R7: the seven resistance, the R8: the eight resistance, the R9: the nine resistance, the R10: the ten resistance, R11: eleventh resistor, R12: the
12 resistance, R13: thirteenth resistor, the D4: the four diode, the D5: the five diode, D5*: Alcor diode, D6: the six
Diode, the D6*: the six star diode, the D7: the seven diode, the D9: the nine diode, the U1: the first optocoupler, the U2: the second optocoupler,
Z1: the first voltage-stabiliser tube, the Z2: the second voltage-stabiliser tube, the Q1: the first triode, the Q2: the second triode, Q3: third transistor, Q4: the four
Triode, the Q5: the first field-effect tube, the Q6: the second field-effect tube, C1: filter capacitor.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and examples.
Embodiment one
As depicted in figs. 1 and 2, a kind of high pressure preliminary filling modular circuit 100 for load storage energy capacitor, including it is connecting terminal, pre-
Charging circuit 120, the monitoring feed circuit 160 for monitoring 120 both ends pressure difference of precharging circuit and for controlling load storage energy capacitor
The automatic discharge circuit 140 of electric discharge.
Connecting terminal includes high pressure preliminary filling switchs terminals KZ1, high pressure contact switch terminal KZ2, Pressure difference feedback wiring
Hold FB, low-voltage power supply terminals LV+, high direct voltage positive input terminal HV+_IN, high direct voltage negative input end HV-_IN, high direct voltage
Positive output end HV+_OUT and high direct voltage negative output terminal HV-_OUT, high direct voltage positive input terminal HV+_IN, high direct voltage are born defeated
Enter to hold HV-_IN connection external power supply, high direct voltage positive output end HV+_OUT connects negative with high direct voltage negative output terminal HV-_OUT
Storage capacitor is carried, high pressure preliminary filling switchs terminals KZ1, high pressure contact switch terminal KZ2, Pressure difference feedback terminals FB, low pressure
For electric connection terminal LV+ connection peripheral control unit, peripheral control unit is air-conditioner controller HVAC or heat management system controller TMSC.
Precharging circuit 120 is connected between high direct voltage positive input terminal HV+_IN and high direct voltage positive output end HV+_OUT,
The first voltage input terminal of the input terminal connection monitoring feed circuit 160 of precharging circuit 120, the output end of precharging circuit 120 connect
The second voltage input terminal of monitoring feed circuit 160 is connect, the output end of monitoring feed circuit 160 connects Pressure difference feedback terminals
FB；Automatic discharge circuit 140 is connected between high direct voltage positive output end HV+_OUT and high direct voltage negative output terminal HV-_OUT.
Precharging circuit 120 includes the in parallel first branch and second branch, the first branch include be sequentially connected in series it is inverse
Protective module 121, the first high-voltage relay K1 and first resistor R1 are met, second branch includes high pressure contact-making switch K2, and first is high
The power supply coil of potential relay K1 is connected between high pressure preliminary filling switchs terminals KZ1 and low-voltage power supply terminals LV+, high-voltage connecting
The power supply coil of touching switch K2 is connected between high pressure contact switch terminal KZ2 and low-voltage power supply terminals LV+, the present embodiment
In, the inverse protective module 121 that connects uses the 7th diode D7.
Monitoring feed circuit 160 include be sequentially connected in series 3rd resistor R3, the 4th high-voltage relay K4, the first optocoupler U1,
The primary side light-emitting diodes tube anode of first voltage-stabiliser tube Z1 and third transistor Q3, the first optocoupler U1 pass through the 4th high-voltage relay K4
The input terminal of precharging circuit 120 is connected with 3rd resistor R3, the power supply coil of the 4th high-voltage relay K4 is connected to high pressure preliminary filling
Between switch terminal KZ1 and low-voltage power supply terminals LV+, the primary side light-emitting diodes tube cathode of the first optocoupler U1 connects precharge
120 output end of road, there is reverse parallel connection between the primary side light-emitting diodes tube anode and primary side light-emitting diodes tube cathode of the first optocoupler U1
Pass through the 4th resistance after the cathode of the first voltage-stabiliser tube Z1 of secondary side transistor collector connection of 4th diode D4, the first optocoupler U1
The secondary side transistor emitter of R4 connection low-voltage power supply terminals LV+, the first optocoupler U1 are grounded, and the anode of the first voltage-stabiliser tube Z1 connects
Current limiting breaking circuit is connected after connecing the base stage of third transistor Q3, the collector of third transistor Q3 passes through twelfth resistor
The collector of R12 connection low-voltage power supply terminals LV+, third transistor Q3 connect Pressure difference feedback terminals FB, current limliting shutdown electricity
Road includes the first triode Q1 and the 8th resistance R8, and the collector of the first triode Q1 connects the base stage of third transistor Q3, the
The emitter of one triode Q1 is grounded, and passes through the 8th electricity after the emitter of the base stage connection third transistor Q3 of the first triode Q1
Hinder R8 ground connection.
Automatic discharge circuit 140 includes concatenated third high-voltage relay K3 and second resistance R2, third high-voltage relay
The hot-wire coil of K3 is separately connected high pressure preliminary filling switchs terminals KZ1 by discharge control loop, high pressure contacts switch terminal
KZ2；The input terminal of the discharge control loop connects low-voltage power supply terminals LV+, and the first input end of discharge control loop is logical
The 6th resistance R6 connection low-voltage power supply terminals LV+ is crossed, the second input terminal of discharge control loop is connected by the 5th diode D5
High pressure preliminary filling switchs terminals KZ1 is met, the third input terminal of discharge control loop is contacted by the 6th diode D6 connection high pressure
Switch terminal KZ2, the discharge control loop include concatenated third high-voltage relay K3 hot-wire coil, the second triode Q2
With the 7th resistance R7, third high-voltage relay K3 hot-wire coil connects low-voltage power supply terminals far from one end of the second triode Q2
The collector and base series of LV+, the second triode Q2 are between third high-voltage relay K3 coil and the 7th resistance R7, and second
Filter capacitor C1 is connected between the base stage of triode Q2 and the 7th resistance R7, the cathode of filter capacitor C1 connects the second triode
It is grounded after the emitter of Q2.It is noted that D1, D2, D3, D8 are the freewheeling diode on relay coil, this category is existing,
It does not repeat.
100 preliminary work of high pressure preliminary filling device, the first high-voltage relay K1, which is first controlled by peripheral control unit, to be closed, load storage
Energy capacitor is gradually increasing by voltage after first resistor R1 current-limiting charge, when monitoring feed circuit 160 monitors precharging circuit both ends
After pressure difference reaches trigger voltage, such as trigger voltage is 30V, and monitoring feed circuit 160 exports feedback signal FB and turned over by high level
Switch to low level, to notify peripheral control unit to disconnect the first high-voltage relay K1, closed high contact-making switch K2；Work as load storage energy
High-tension circuit locating for capacitor breaks down, and after the first high-voltage relay K1 closure, voltage rises slower on load storage energy capacitor
Or do not rise, 120 both ends pressure difference of precharging circuit continues higher level, and the light emitting diode of the first optocoupler U1 primary side is constantly in
On state, the output signal FB for monitoring feed circuit 160 are not overturn in the scheduled time as low level, and peripheral control unit can
Know closure of the malfunction without controlling high pressure contact-making switch K2, while peripheral control unit is sent out to the controller of more top
Error code is sent, notifies the malfunction；When high direct voltage positive-negative input end is inverse to be connect, after the first high-voltage relay K1 closure, in advance
Concatenated in charging circuit 120 it is inverse connect protective module 121 and load circuit can be prevented to be damaged, and monitor feed circuit 160 at this time
Output signal FB be within the predetermined time low level not from high level overturning, peripheral control unit would know that the malfunction
Closure without controlling high voltage connector, while peripheral control unit sends error code to the controller of more top, notifies the event
Barrier state；After peripheral control unit disconnects the first high-voltage relay K1 and high pressure contact-making switch K2, automatic discharge circuit 140
Discharge loop is enabled automatically according to two control signal conditions of KZ1 and KZ2, so that load storage energy capacitor powers on pressure in a short time
Safety value is discharged into, to protect the safety of installation maintenance personnel.
In conclusion the present invention monitors feed circuit using the pressure difference of lower cost, the prison of precharging circuit state is realized
It surveys, is furthermore also equipped with the inverse automatic discharging function of diagnosing defencive function and load storage energy circuit of connecing failure, the present invention does not have
Using microcontroller, circuit function is not easily susceptible to brought when module mesohigh high-current relay or contactless contactor work
EMI noise influences, reliable operation and low in cost.
Embodiment two
The present embodiment and the structure of embodiment one are essentially identical, unlike: as shown in figure 3, automatic discharge circuit 140 includes string
The the second field-effect tube Q6 and the second star resistance R2* of connection, the pole G of the second field-effect tube Q6 is separately connected by discharge control loop
High pressure preliminary filling switchs terminals KZ1, high pressure contact switch terminal KZ2；The input terminal of the discharge control loop connects direct current
Voltage VG1, DC voltage VG1 are greater than 9~15V of high direct voltage positive input terminal HV+_IN input voltage, the discharge control loop
Including concatenated 5th resistance R5, the second optocoupler U2 and the 6th star resistance R6*, the primary side light-emitting diodes tube anode of the second optocoupler U2
Connect the primary side diode cathode connection Alcor diode D5* and the 6th star two of the 6th star resistance R6*, the second optocoupler U2
The pole G of the connection of secondary side collector the 5th resistance R5 and the second field-effect tube Q6 of pole pipe D6*, the second optocoupler U2, the second optocoupler U2
Secondary side transistor collector pass through the pole S of the 9th resistance R9 the second field-effect tube of connection Q6, three pole of secondary side of the second optocoupler U2
Pipe emitter connects the pole S of the second field-effect tube Q6, and the pole D of the second field-effect tube Q6 passes through the second star resistance R2* connection direct current
High pressure positive output end HV+_OUT.
VG1 is converted to by the isolated DC/DC module of a small-power from low-voltage power supply terminals LV+, load storage energy capacitor
Automatic discharge circuit 140 in the position third high-voltage relay K3 can be replaced with the metal-oxide-semiconductor Jing Guo isolation drive, actually should
It is other outside the high pressure contact-making switch K2 of inside modules to use solid-state relay, the field-effect tube by isolation drive, warp
Cross any one in the silicon-controlled of isolation drive or IGBT Jing Guo isolation drive.
Embodiment three
The present embodiment and the structure of embodiment one are essentially identical, unlike: as shown in figure 4, the inverse protective module 121 that connects includes the
One field-effect tube Q5, the 9th diode D9, the second voltage-stabiliser tube Z2, the 4th triode Q4, thirteenth resistor R13, the tenth resistance R10
With eleventh resistor R11, the 9th diode D9, the second voltage-stabiliser tube Z2 and thirteenth resistor R13 be sequentially connected in series high direct voltage just
Between input terminal HV+_IN, high direct voltage negative input end HV-_IN, the D grade of the first field-effect tube Q5 and the pole S are connected on first
In road, blanking voltage VG2 is accessed by eleventh resistor R11 in the pole G of the first field-effect tube Q5, and blanking voltage VG2 is greater than direct current
High pressure positive input terminal 9~15V of HV+_IN input voltage, the base stage of the 4th triode Q4 are connected to the 30th resistance R13 and second
Between voltage-stabiliser tube Z2, the emitter of the 4th triode Q4 is connected between the 9th diode D9 and the second voltage-stabiliser tube Z2, and the four or three
The collecting field of pole pipe Q4 connects the pole G of the first effect pipe Q5, and the emitter of the 4th triode Q4 passes through the tenth resistance R10 connection
The pole D of the pole S of first field-effect tube Q5, the first effect pipe Q5 connects direct current with first resistor R1 by the first high-voltage relay K1
High pressure positive output end HV+_OUT.
In the present embodiment, the inverse protective module 121 that connects is using the scheme of field-effect tube, and VG2 is by the isolated DC/DC of a small-power
Module is converted to from LV+；When high voltage input terminal is positive and negative not to be reversely connected, due to voltage between the G-S of the first field-effect tube Q5
It is conducted through preliminary filling electric current for VG2, the first effect pipe Q5, when the positive and negative reversal connection of high voltage input terminal, the 4th triode Q4 is driven
Conducting, so that voltage between the G-S of the first effect pipe Q5 is drawn to close to 0V, the first effect pipe Q5 is by cannot flow through precharge
Stream；9th diode D9 is a high voltage-small current diode, and effect is the pole the B-E reverse breakdown for preventing the 4th triode Q4.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, this field is common
Other modifications or equivalent replacement that technical staff makes technical solution of the present invention, without departing from technical solution of the present invention
Spirit and scope, be intended to be within the scope of the claims of the invention.
Claims (7)
1. a kind of high pressure preliminary filling modular circuit for load storage energy capacitor, it is characterised in that: including connecting terminal, precharging circuit
(120), for monitoring the monitoring feed circuit (160) of precharging circuit (120) both ends pressure difference and for controlling load storage energy capacitor
The automatic discharge circuit (140) of electric discharge；
The connecting terminal includes high pressure preliminary filling switchs terminals, high pressure contact switch terminal, Pressure difference feedback terminals, low pressure
For electric connection terminal, high direct voltage positive input terminal, high direct voltage negative input end, high direct voltage positive output end and high direct voltage negative output
End, high direct voltage positive input terminal, high direct voltage negative input end connect external power supply, and high direct voltage positive output end and high direct voltage are negative
Output end connect load storage energy capacitor, high pressure preliminary filling switchs terminals, high pressure contact switch terminal, Pressure difference feedback terminals,
Low-voltage power supply terminals connect peripheral control unit；
The precharging circuit (120) is connected between high direct voltage positive input terminal and high direct voltage positive output end, the precharge
The first voltage input terminal of input terminal connection monitoring feed circuit (160) on road (120), the output of the precharging circuit (120)
The output end of the second voltage input terminal of end connection monitoring feed circuit (160), monitoring feed circuit (160) connects pressure difference
Feedback connection end；Automatic discharge circuit (140) is connected between high direct voltage positive output end and high direct voltage negative output terminal.
2. a kind of high pressure preliminary filling modular circuit for load storage energy capacitor according to claim 1, it is characterised in that: institute
Stating monitoring feed circuit (160) includes the 3rd resistor being sequentially connected in series, the 4th high-voltage relay, the first optocoupler, the first voltage-stabiliser tube
And third transistor, the primary side light-emitting diodes tube anode of the first optocoupler connect preliminary filling with 3rd resistor by the 4th high-voltage relay
The input terminal of circuit (120), the power supply coil of the 4th high-voltage relay are connected to high pressure preliminary filling switchs terminals and low-voltage power supply
Between terminals, the primary side light-emitting diodes tube cathode of the first optocoupler connects precharging circuit (120) output end, the primary side of the first optocoupler
Reverse parallel connection has the 4th diode, three pole of secondary side of the first optocoupler between light-emitting diodes tube anode and primary side light-emitting diodes tube cathode
Low-voltage power supply terminals, the secondary side three of the first optocoupler are connected by the 4th resistance after the cathode of pipe collector the first voltage-stabiliser tube of connection
Pole pipe emitter is grounded, and connects current limiting breaking circuit, third after the base stage of the anode connection third transistor of the first voltage-stabiliser tube
The collector of triode connects low-voltage power supply terminals by twelfth resistor, and the collector of third transistor connects Pressure difference feedback
Terminals, current limliting breaking circuit include the first triode and the 8th resistance, and the collector of the first triode connects third transistor
Base stage, the emitter ground connection of the first triode passes through the after the emitter of the base stage connection third transistor of the first triode
Eight resistance eutral groundings.
3. a kind of high pressure preliminary filling modular circuit for load storage energy capacitor according to claim 1, it is characterised in that: institute
Stating precharging circuit (120) includes the in parallel first branch and second branch, and the first branch includes that be sequentially connected in series inverse meets guarantor
Protect control module (121), the first high-voltage relay and first resistor, second branch includes high pressure contact-making switch, the first high pressure after
The power supply coil of electric appliance is connected between high pressure preliminary filling switchs terminals and low-voltage power supply terminals, the power supply of high pressure contact-making switch
Coil is connected between high pressure contact switch terminal and low-voltage power supply terminals.
4. a kind of high pressure preliminary filling modular circuit for load storage energy capacitor according to claim 3, it is characterised in that: institute
Inverse connect protective module (121) are stated using the 7th diode.
5. a kind of high pressure preliminary filling modular circuit for load storage energy capacitor according to claim 3, it is characterised in that: institute
Stating inverse connect protective module (121) includes the first field-effect tube, the 9th diode, the second voltage-stabiliser tube, the 4th triode, the 13rd electricity
Resistance, the tenth resistance and eleventh resistor, the 9th diode, the second voltage-stabiliser tube and thirteenth resistor be sequentially connected in series high direct voltage just
Between input terminal, high direct voltage negative input end, the D grade of the first field-effect tube and the pole S are connected in the first branch, the first field-effect
Blanking voltage is accessed by eleventh resistor in the pole G of pipe, and blanking voltage is greater than high direct voltage positive input terminal 9~15V of input voltage,
The base stage of 4th triode is connected between the 30th resistance and the second voltage-stabiliser tube, and the emitter of the 4th triode is connected to the 9th
Between diode and the second voltage-stabiliser tube, the collecting field of the 4th triode connects the pole G of the first effect pipe, the hair of the 4th triode
Emitter-base bandgap grading connects the pole S of the first field-effect tube by the tenth resistance, and the pole D of the first field-effect tube passes through the first high-voltage relay and the
One resistance connects high direct voltage positive output end.
6. a kind of high pressure preliminary filling modular circuit for load storage energy capacitor according to claim 1, it is characterised in that: institute
Stating automatic discharge circuit (140) includes concatenated third high-voltage relay and second resistance, the live wire of third high-voltage relay
Circle is separately connected high pressure preliminary filling switchs terminals by discharge control loop, high pressure contacts switch terminal；The control of discharge
The input terminal in circuit connects low-voltage power supply terminals, and the first input end of discharge control loop connects low pressure by the 6th resistance and supplies
Second input terminal of electric connection terminal, discharge control loop connects high pressure preliminary filling switchs terminals, electric discharge control by the 5th diode
The third input terminal in circuit processed connects high pressure by the 6th diode and contacts switch terminal, and discharge control loop includes concatenated
Third high-voltage relay hot-wire coil, the second triode and the 7th resistance, third high-voltage relay hot-wire coil is far from the two or three
One end of pole pipe connects low-voltage power supply terminals, and the collector and base series of the second triode are in third high-voltage relay coil
And the 7th between resistance, filter capacitor is connected between the base stage of the second triode and the 7th resistance, the cathode of filter capacitor connects
It is grounded after connecing the emitter of the second triode.
7. a kind of high pressure preliminary filling modular circuit for load storage energy capacitor according to claim 1, it is characterised in that: institute
Stating automatic discharge circuit (140) includes concatenated second field-effect tube and the second star resistance, and the pole G of the second field-effect tube is by putting
Electric control loop is separately connected high pressure preliminary filling switchs terminals, high pressure contact switch terminal；The discharge control loop it is defeated
Enter end connection DC voltage, DC voltage is greater than 9~15V of high direct voltage positive input terminal input voltage, the discharge control loop
Including concatenated 5th resistance, the second optocoupler and the 6th star resistance, the primary side light-emitting diodes tube anode connection the 6th of the second optocoupler
Star resistance, the primary side diode cathode connection Alcor diode of the second optocoupler and the 6th star diode, the secondary side of the second optocoupler
Collector connects the pole G of the 5th resistance and the second field-effect tube, and the secondary side transistor collector of the second optocoupler passes through the 9th resistance
Connecting the pole S of the second field-effect tube, the secondary side transistor emitter of the second optocoupler connects the pole S of the second field-effect tube, and second
The pole D of effect pipe connects high direct voltage positive output end by the second star resistance.
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| CN201811622364.8A CN109638920B (en) | 2018-12-28 | 2018-12-28 | High-voltage pre-charging module circuit for load energy storage capacitor |
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| CN201811622364.8A CN109638920B (en) | 2018-12-28 | 2018-12-28 | High-voltage pre-charging module circuit for load energy storage capacitor |
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| CN109638920B CN109638920B (en) | 2024-07-12 |
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| CN110138044A (en) * | 2019-06-04 | 2019-08-16 | 中国第一汽车股份有限公司 | A kind of power battery charge-discharge control system, method and vehicle |
| CN111416449A (en) * | 2020-03-30 | 2020-07-14 | 维沃移动通信有限公司 | Wireless charging equipment |
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| CN113595033A (en) * | 2021-07-06 | 2021-11-02 | 昂宝电子（上海）有限公司 | Circuit and method for switch action recognition and abnormal power-on recognition |
| CN113484586A (en) * | 2021-07-13 | 2021-10-08 | 上海中科深江电动车辆有限公司 | Device for detecting auxiliary power consumption differential pressure of electric automobile high-voltage relay control |
| CN114024288A (en) * | 2021-11-25 | 2022-02-08 | 珠海格力电器股份有限公司 | Driver power-on pre-charging circuit, device and driver |
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