CN109177732A - The power control circuit of electric vehicle battery management system - Google Patents
The power control circuit of electric vehicle battery management system Download PDFInfo
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- CN109177732A CN109177732A CN201810987116.7A CN201810987116A CN109177732A CN 109177732 A CN109177732 A CN 109177732A CN 201810987116 A CN201810987116 A CN 201810987116A CN 109177732 A CN109177732 A CN 109177732A
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- 230000005669 field effect Effects 0.000 claims abstract description 194
- 230000002093 peripheral effect Effects 0.000 claims abstract description 44
- 239000003381 stabilizer Substances 0.000 claims description 74
- 239000003990 capacitor Substances 0.000 claims description 58
- 230000005611 electricity Effects 0.000 claims description 18
- 238000012360 testing method Methods 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 10
- 230000000694 effects Effects 0.000 claims 3
- 238000010586 diagram Methods 0.000 description 10
- 230000002159 abnormal effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000002547 anomalous effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
This application involves a kind of power control circuits of electric vehicle battery management system, including power sense circuit, control signal circuit and two or more field-effect tube driving circuits, the input terminal of each field-effect tube driving circuit is respectively used to connect different types of charge power supply, the control terminal of each field-effect tube driving circuit is all connected with control signal circuit, the output end of each field-effect tube driving circuit is all connected with the power supply of control circuit, power sense circuit is for connecting charge power supply and peripheral control unit, and control signal circuit is for connecting peripheral control unit.It is detected by output voltage of the power sense circuit to external power supply, control signal circuit controls the field-effect tube driving circuit conducting of the highest charge power supply of output voltage, the highest charge power supply of output voltage is accessed to the power supply power supply of control circuit, low on-resistance when being connected using field-effect tube can be effectively reduced thermal losses when through super-high-current, improve the use reliability and stability of system.
Description
Technical field
This application involves Charge Management technical fields, more particularly to a kind of power supply control of electric vehicle battery management system
Circuit processed.
Background technique
Electric vehicle, which refers to, makees the haulage vehicle that motive power is driven with traction motor, common electric vehicle master with electric energy
There are trunk railway electric vehicle, Subway rolling stocks, city electric car, light rail electric vehicle, battery electric vehicle etc..
In the battery management system power circuit of electric car, to prevent user misoperation such as confession in use
Electric reverse power connection, is often used that diode is anti-reverse to guarantee the reliable of battery management system.Traditional batteries of electric automobile management
The power circuit of system prevents reverse power connection using diode fashion, in normal use process, when needing to drive relay
When, due to diode fixed pressure drop and driving relay when high current, cause the power consumption on diode to be multiplied, exist
It generates heat when large current load serious problem, there are use reliabilities for the battery management system power circuit of traditional electric car
Low disadvantage.
Summary of the invention
Based on this, it is necessary in view of the above-mentioned problems, providing a kind of electric vehicle battery management that use reliability can be improved
The power control circuit of system.
A kind of power control circuit of electric vehicle battery management system, including power sense circuit, control signal circuit
And two or more field-effect tube driving circuits, the input terminal of each field-effect tube driving circuit are respectively used to connect
Different types of charge power supply is connect, the control terminal of each field-effect tube driving circuit is all connected with the control signal circuit, respectively
The output end of the field-effect tube driving circuit is all connected with the power supply of control circuit, and the power sense circuit is described for connecting
Charge power supply and peripheral control unit, the control signal circuit are used to connect the peripheral control unit,
The power sense circuit is used to detect the output voltage of the charge power supply, and will test result be sent to it is described
Peripheral control unit；The control signal circuit refers to for receiving the peripheral control unit according to the control that the testing result is sent
It enables, the highest charge power supply of output voltage in different types of charge power supply is obtained according to the control instruction, and send driving
Signal extremely connects the field-effect tube driving circuit of the highest charge power supply of output voltage；The field-effect tube driving circuit is receiving
It is connected when to the driving signal, accesses the output voltage of the charge power supply of connection and to the power supply power supply of the control circuit.
The power control circuit of above-mentioned electric vehicle battery management system, power sense circuit is for detecting charge power supply
Output voltage, and will test result and be sent to peripheral control unit.Control signal circuit is for receiving peripheral control unit according to detection
As a result the control instruction sent obtains the highest charging electricity of output voltage in different types of charge power supply according to control instruction
Source, and driving signal is sent to the field-effect tube driving circuit for connecting the highest charge power supply of output voltage；Field-effect tube driving
Circuit conducting when receiving driving signal accesses the output voltage of the charge power supply of connection and supplies the power supply of control circuit
Electricity.It is detected by output voltage of the power sense circuit to external power supply, control signal circuit controls output voltage highest
Charge power supply the conducting of field-effect tube driving circuit, the access highest charge power supply of output voltage supplies the power supply of control circuit
Electricity realizes the Charge Management to the system power supply of electric vehicle battery management system.Low conducting when being connected using field-effect tube
Resistance can be effectively reduced thermal losses when through super-high-current, improve the use reliability and stability of whole system.
Detailed description of the invention
Fig. 1 is the structural block diagram of the power control circuit of electric vehicle battery management system in an embodiment；
Fig. 2 is the structural block diagram of the power control circuit of electric vehicle battery management system in another embodiment；
Fig. 3 is the schematic diagram of fast charge field-effect tube driving circuit in an embodiment；
Fig. 4 is the schematic diagram of trickle charge field-effect tube driving circuit in an embodiment；
Fig. 5 is the schematic diagram of normalizing field-effect tube driving circuit in an embodiment；
Fig. 6 is the schematic diagram of fast charge power sense circuit in an embodiment；
Fig. 7 is the schematic diagram of trickle charge power sense circuit in an embodiment；
Fig. 8 is the schematic diagram of normalizing power sense circuit in an embodiment；
Fig. 9 is the schematic diagram of system power supply detection circuit in an embodiment；
Figure 10 is the schematic diagram of control signal circuit in an embodiment.
Specific embodiment
It is with reference to the accompanying drawings and embodiments, right in order to which the objects, technical solutions and advantages of the application are more clearly understood
The application is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the application, not
For limiting the application.
In one embodiment, a kind of power control circuit of electric vehicle battery management system, electric vehicle are provided
It specifically can be electric car etc..As shown in Figure 1, the power control circuit includes power sense circuit 110, control signal circuit
120 and two or more field-effect tube driving circuits 130, the input terminal difference of each field-effect tube driving circuit 130
For connecting different types of charge power supply, the control terminal of each field-effect tube driving circuit is all connected with control signal circuit 120, respectively
The output end of field-effect tube driving circuit 130 is all connected with the power supply 200 of control circuit, and power sense circuit 110 is filled for connecting
Power supply and peripheral control unit 300, control signal circuit 120 is for connecting peripheral control unit 300.Wherein, the electricity of control circuit
Source 200 is used as system power supply, and charge power supply is used as powers to system power supply.
Power sense circuit 110 is used to detect the output voltage of charge power supply, and will test result and be sent to external control
Device 300；Control signal circuit 120 refers to for receiving the control instruction that peripheral control unit is sent according to testing result according to control
So that the highest charge power supply of output voltage into different types of charge power supply, and driving signal is sent to connecting output voltage
The field-effect tube driving circuit of highest charge power supply；The conducting when receiving driving signal of field-effect tube driving circuit 130, connects
Enter the output voltage of the charge power supply of connection and powers to the power supply of control circuit 200.
Specifically, MCU (Micro Control Unit, micro-control unit), power detecting can be used in peripheral control unit 300
Circuit 110 detects the output voltage of all charge power supplies, and will test result and be sent to peripheral control unit 300, external
Controller 300 exports corresponding control instruction according to testing result, is used as instruction control signal circuit 120 and accesses output voltage most
Power supply power supply of the high external power supply to control circuit.Control signal circuit 120 is after receiving control instruction, output driving letter
Number to field-effect tube driving circuit 130 corresponding to the highest external power supply of voltage, controls the field-effect tube driving circuit 130 and lead
Connect the power supply power supply into the highest external power supply of voltage to control circuit.The type of driving signal is not unique, can be height
Level or low level, to use high level for driving signal, control signal circuit 120 be can be by exporting corresponding control
Signal processed controls the on-off of each field-effect tube driving circuit 130, and field-effect tube driving circuit 130 is height in received control signal
Electric conducts are turned off when received control signal is low level.
The specific working mode of control signal circuit 120 is not unique.In one embodiment, control signal circuit 120
For using the circuit of 3-8 decoder work.When the control instruction that peripheral control unit 300 is input to control signal circuit 120 is abnormal
When, since control signal circuit 120 uses 3-8 decoder working method, exported in any case to field-effect tube driving circuit
130 control signal only has unique high level to exist, and effectively avoid in control signal more than the two is high level simultaneously
When cause in multiple charge power supplies two or more power supplys simultaneously turn on caused by short circuit problem, improve power supply control
The safety in utilization of circuit.
In one embodiment, charge power supply includes fast charge power supply, trickle charge power supply and normalizing power supply, as shown in Fig. 2, field is imitated
Answering tube drive circuit 130 includes fast charge field-effect tube driving circuit 132, trickle charge field-effect tube driving circuit 134 and normalizing field effect
Tube drive circuit 136 is answered, the input terminal of fast charge field-effect tube driving circuit 132 connects fast charge power supply, output end connection control electricity
The power supply 200 on road, control terminal connect control signal circuit 120；The input terminal of trickle charge field-effect tube driving circuit 134 connects trickle charge
Power supply, output end connect the power supply 200 of control circuit, and control terminal connects control signal circuit 120；Normalizing field-effect tube driving electricity
The input terminal on road 136 connects normalizing power supply, and output end connects the power supply 200 of control circuit, and control terminal connects control signal circuit
120。
In the present embodiment, using fast charge power supply, trickle charge power supply and normalizing power supply as the power supply of system, signal electricity is controlled
The control instruction based on the received of road 120 is right by the highest power supply institute of output voltage in fast charge power supply, trickle charge power supply and normalizing power supply
The driving circuit conducting answered, accesses highest voltage and is powered to the power supply 300 of control circuit.By detection fast charge power supply,
The output voltage of three kinds of power supplys of trickle charge power supply and normalizing power supply simultaneously uses the highest power supply of voltage to supply for the power supply 300 of control circuit
Electricity, it is ensured that the charging reliability of electric vehicle battery management system.
The power control circuit of above-mentioned electric vehicle battery management system, by power sense circuit 110 to external power supply
300 output voltage is detected, and control signal circuit 120 controls the field-effect tube driving of the highest charge power supply of output voltage
Circuit 130 is connected, and realizes the selection of multichannel input power, accesses the highest charge power supply of output voltage processed to the electricity of control circuit
Source 200 powers, and realizes the Charge Management to the system power supply of electric vehicle battery management system.When being connected using field-effect tube
Low on-resistance can be effectively reduced thermal losses when through super-high-current, improve the use reliability and stabilization of whole system
Property.
It is appreciated that fast charge field-effect tube driving circuit 132, trickle charge field-effect tube driving circuit 134 and normalizing field-effect
The specific structure of tube drive circuit 136 is not uniquely, in one embodiment, as shown in figure 3, fast charge field-effect tube drives
Circuit 132 includes field-effect tube Q203, field-effect tube Q207, resistance R218, resistance R236, resistance R239, resistance R240, pressure stabilizing
Pipe D203 and capacitor C0603.
Input terminal of the first end of field-effect tube Q207 as fast charge field-effect tube driving circuit 132, especially by port
FACT_CHARGER+ connection fast charge power supply, the second end of field-effect tube Q207 is as the defeated of fast charge field-effect tube driving circuit 132
Outlet, and pass through the control terminal of resistance R218 connection field-effect tube Q207, the second end of field-effect tube Q207 is especially by port
The power supply 200 of 12V_BAT connection control circuit.The second end of the cathode connection field-effect tube Q207 of voltage-stabiliser tube D203, anode connect
Connect the control terminal of field-effect tube Q207.The control terminal of field-effect tube Q207 passes through the first of resistance R236 connection field-effect tube Q203
End, the second end ground connection of field-effect tube Q203, one end of the control terminal connection resistance R239 of field-effect tube Q203, and pass through capacitor
C0603 ground connection, control terminal of the other end of resistance R239 as fast charge field-effect tube driving circuit 132, and pass through resistance R240
Ground connection.In the present embodiment, field-effect tube Q203 uses NMOS tube, and field-effect tube Q207 uses PMOS tube.Wherein, field-effect tube
Q207 is that the p-type pole MOSFET, D of power supply selection inputs connection fast charge power supply as external power supply, and the pole S is as control circuit
Internal electric source inputs (12V-BAT).
In one embodiment, as shown in figure 4, trickle charge field-effect tube driving circuit 134 includes field-effect tube Q205, field effect
It should pipe Q208, resistance R216, resistance R234, resistance R220, resistance R222, voltage-stabiliser tube D201 and capacitor C221.
Input terminal of the first end of field-effect tube Q205 as trickle charge field-effect tube driving circuit 134, especially by port
SLOW_CHARGER+ connection trickle charge power supply, the second end of field-effect tube Q205 is as the defeated of trickle charge field-effect tube driving circuit 134
Outlet, and pass through the control terminal of resistance R216 connection field-effect tube Q205, the second end of field-effect tube Q205 is especially by port
The power supply 200 of 12V_BAT connection control circuit.The second end of the cathode connection field-effect tube Q205 of voltage-stabiliser tube D201, anode connect
Connect the control terminal of field-effect tube Q205.The control terminal of field-effect tube Q205 passes through the first of resistance R234 connection field-effect tube Q208
End, the second end ground connection of field-effect tube Q208, one end of the control terminal connection resistance R220 of field-effect tube Q208, and pass through capacitor
C221 ground connection, control terminal of the other end of resistance R220 as trickle charge field-effect tube driving circuit 134, and connect by resistance R222
Ground.In the present embodiment, field-effect tube Q208 uses NMOS tube, and field-effect tube Q205 uses PMOS tube.
In one embodiment, as shown in figure 5, normalizing field-effect tube driving circuit 136 includes field-effect tube Q206, field effect
It should pipe Q209, resistance R217, resistance R235, resistance R237, resistance R238, voltage-stabiliser tube D202 and capacitor C222.
Input terminal of the first end of field-effect tube Q206 as normalizing field-effect tube driving circuit 136, especially by port
DC_AUXILIARY_BATTERY connection normalizing power supply, the second end of field-effect tube Q206 is as normalizing field-effect tube driving circuit
136 output end, and pass through the control terminal of resistance R217 connection field-effect tube Q206, the second end of field-effect tube Q206 is specifically led to
Cross the power supply 200 of port 12V_BAT connection control circuit.The second end of the cathode connection field-effect tube Q206 of voltage-stabiliser tube D202,
The control terminal of anode connection field-effect tube Q206.The control terminal of field-effect tube Q206 passes through resistance R235 connection field-effect tube Q209
First end, the second end ground connection of field-effect tube Q209, one end of the control terminal connection resistance R237 of field-effect tube Q209 and leads to
Capacitor C222 ground connection, control terminal of the other end of resistance R237 as normalizing field-effect tube driving circuit 136 are crossed, and passes through resistance
R238 ground connection.In the present embodiment, field-effect tube Q209 uses NMOS tube, and field-effect tube Q206 uses PMOS tube.
Accordingly, in one embodiment, power sense circuit 110 includes fast charge power sense circuit, the inspection of trickle charge power supply
Slowdown monitoring circuit, normalizing power sense circuit and system power supply detection circuit, fast charge power sense circuit connect fast charge power supply and outside
Controller 300, trickle charge power sense circuit connect trickle charge power supply and peripheral control unit 300, and the connection of normalizing power sense circuit is normal
Ignition source and peripheral control unit 300, system power supply detection circuit connect the power supply 200 and peripheral control unit 300 of control circuit.Point
Not Tong Guo fast charge power sense circuit, trickle charge power sense circuit and normalizing power sense circuit fast charge power supply, trickle charge power supply and
The output voltage of normalizing power supply is detected, and be will test result and issued peripheral control unit 300 and be compared, and output voltage is obtained
Highest power supply is powered operation.It is detected by voltage of the system power supply detection circuit to the power supply 200 of control circuit
And feed back testing result to peripheral control unit 300, the electricity detected for 300 comparison system power sense circuit of peripheral control unit
Pressure and voltage detected by fast charge power sense circuit, trickle charge power sense circuit, normalizing power sense circuit, it is fast to determine
Fill field-effect tube driving circuit 132, trickle charge field-effect tube driving circuit 134 and normalizing field-effect tube driving circuit 136 whether work
Make normal.
Further, in one embodiment, as shown in fig. 6, fast charge power sense circuit includes resistance R244, resistance
R245, resistance R246, capacitor C230, capacitor C231, voltage-stabiliser tube D218 and voltage-stabiliser tube D219, resistance R244 and resistance R245 series connection
And common end, by resistance R246 connection peripheral control unit 300, the other end of resistance R244 connects fast charge power supply, especially by end
Mouth FACT_CHARGER+ connection fast charge power supply, the other end ground connection of resistance R245；The one of one end of capacitor C230 and capacitor C231
End is separately connected the both ends resistance R246, and the other end of capacitor C230 and the other end of capacitor C231 are grounded；Voltage-stabiliser tube D218's
Cathode connects the anode of voltage-stabiliser tube D219, and the cathode of the plus earth of voltage-stabiliser tube D218, voltage-stabiliser tube D219 connects power access end,
The common end connection resistance R246 of access+5V direct current in the present embodiment, voltage-stabiliser tube D218 and voltage-stabiliser tube D219 and external control
The common end of device 300.
In one embodiment, as shown in fig. 7, trickle charge power sense circuit includes resistance R200, resistance R202, resistance
R201, capacitor C201, capacitor C200, voltage-stabiliser tube D204 and voltage-stabiliser tube D200, resistance R200 and resistance R202 series connection and common end
By resistance R201 connection peripheral control unit 300, the other end of resistance R200 connects trickle charge power supply, especially by port SLOW_
CHARGER+ connection trickle charge power supply, the other end ground connection of resistance R202；One end of capacitor C201 and one end difference of capacitor C200
The both ends resistance R201 are connected, the other end of capacitor C201 and the other end of capacitor C201 are grounded；The cathode of voltage-stabiliser tube D200 connects
The anode of voltage-stabiliser tube D204 is connect, the cathode of the plus earth of voltage-stabiliser tube D200, voltage-stabiliser tube D204 connects power access end, this implementation
Access+5V direct current in example, and the common end of voltage-stabiliser tube D200 and voltage-stabiliser tube D204 connection resistance R201 and peripheral control unit 300
Common end.
In one embodiment, as shown in figure 8, normalizing power sense circuit includes resistance R241, resistance R242, resistance
R243, capacitor C224, capacitor C20604, voltage-stabiliser tube D216 and voltage-stabiliser tube D217, resistance R241 and resistance R242 series connection and it is public
End is by resistance R243 connection peripheral control unit 300, and the other end of resistance R241 connects normalizing power supply, especially by port DC_
AUXILIARY_BATTERY connection normalizing power supply, the other end ground connection of resistance R242；One end of capacitor C224 and capacitor C0604
One end be separately connected the both ends resistance R243, the other end of capacitor C224 and the other end of capacitor C0604 are grounded；Voltage-stabiliser tube
The anode of the cathode connection voltage-stabiliser tube D216 of D217, the cathode of the plus earth of voltage-stabiliser tube D217, voltage-stabiliser tube D216 connect power supply
Incoming end, access+5V direct current in the present embodiment, and the common end of voltage-stabiliser tube D217 and voltage-stabiliser tube D216 connection resistance R243 with
The common end of peripheral control unit 300.
In one embodiment, as shown in figure 9, system power supply detection circuit includes resistance R247, resistance R248, resistance
R221, capacitor C232, capacitor C225, voltage-stabiliser tube D224 and voltage-stabiliser tube D225, resistance R247 and resistance R248 series connection and common end
By resistance R221 connection peripheral control unit 300, the other end of resistance R247 connects the power supply 200 of control circuit, especially by
The power supply 200 of port 12V_BAT connection control circuit, the other end ground connection of resistance R248；One end of capacitor C232 and capacitor
One end of C225 is separately connected the both ends resistance R221, and the other end of capacitor C232 and the other end of capacitor C225 are grounded；Pressure stabilizing
The anode of the cathode connection voltage-stabiliser tube D225 of pipe D224, the cathode of the plus earth of voltage-stabiliser tube D224, voltage-stabiliser tube D225 connect electricity
Source incoming end, access+5V direct current in the present embodiment, and voltage-stabiliser tube D224 connects resistance R221 with the common end of voltage-stabiliser tube D225
With the common end of peripheral control unit 300.
The specific structure of control signal circuit 120 is not unique, in one embodiment, as shown in Figure 10, control letter
Number circuit 120 includes control chip U302 and capacitor C304, controls chip U302 connection peripheral control unit 300 and field-effect tube drive
Dynamic circuit 130, specifically, the pin A0 and A1 of control chip U302 pass through respectively port VCC-CON0 and port VCC-CON1 with
Peripheral control unit 300 connects, pin A2 ,/E1 ,/E2 and GND ground connection, pin VCC and pin E3 access+5V direct current, and pin
VCC is grounded by capacitor C304.Pin/Y1 ,/Y2 and/Y3 for controlling chip U302 are separately connected trickle charge field-effect tube driving electricity
Road 134, normalizing field-effect tube driving circuit 136 and fast charge field-effect tube driving circuit 132.
Specifically, it is explained in conjunction with Fig. 3 to Figure 10, control signal circuit 120 controls fast charge field-effect tube simultaneously
Driving circuit 132, trickle charge field-effect tube driving circuit 134 and normalizing field-effect tube driving circuit 136, control signal circuit 120
Control signal have VCC-FAST_CON, VCC-SLOW_CON and VCC-DC_CON, wherein VCC-FAST_CON, VCC-SLOW_
CON and VCC-DC_CON is output control signal, is respectively used to control fast charge field-effect tube driving circuit 132, trickle charge field effect
Answer the on-off of tube drive circuit 134 and normalizing field-effect tube driving circuit 136.
Fast charge field-effect tube driving circuit 132, trickle charge field-effect tube driving circuit 134 and normalizing field-effect tube driving circuit
136 are made of high current P-channel metal-oxide-semiconductor and small signal N-channel MOS control system.Under normal mode of operation, initial stage is powered on, by
The body diode of PMOS tube is powered to system power supply, after MCU work, passes through fast charge power sense circuit, trickle charge power detecting
Fast charge supply voltage FAST_CHAGER-V, trickle charge supply voltage SLOW_ detected by circuit, normalizing power sense circuit
CHARGER-V and normalizing supply voltage AUX-BATT-V drives as fast charge field-effect tube driving circuit 132, trickle charge field-effect tube
The enabled foundation of the control signal of dynamic circuit 134 and normalizing field-effect tube driving circuit 136, using ceiling voltage as power supply power supply
Power supply, control signal circuit 120, which exports corresponding high level, makes fast charge field-effect tube driving circuit 132, the driving of trickle charge field-effect tube
One of them is in the conductive state for circuit 134 and normalizing field-effect tube driving circuit 136, and whole system completion is powered in normal
Operating mode.There are 3 kinds of modes under normal mode of operation, the 1st kind is fast charge supply voltage highest, fast charge field-effect tube driving circuit
132 in the conductive state, trickle charge trickle charge field-effect tube driving circuits 134 and normalizing field-effect tube driving circuit 136 are in cut-off
State；2nd kind is trickle charge supply voltage highest, and trickle charge field-effect tube driving circuit 134 is in the conductive state, fast charge field-effect tube
Driving circuit 132 and normalizing field-effect tube driving circuit 136 are in off state；3rd kind is normalizing supply voltage highest, normalizing
Field-effect tube driving circuit 136 is in the conductive state, fast charge field-effect tube driving circuit 132 and the driving of trickle charge trickle charge field-effect tube
Circuit 134 is in off state.Under normal mode of operation 1, control signal circuit 120 exports high-level control signal VCC-
FAST_CON keeps the NMOS tube Q203 of fast charge field-effect tube driving circuit 132 in the conductive state and is in PMOS tube Q207 and leads
Logical state, output low level control signal VCC-SLOW_CON and VCC-DC_CON make trickle charge field-effect tube driving circuit 134
The NMOS tube Q209 of NMOS tube Q208 and normalizing field-effect tube driving circuit 136 keeps off state, and then makes trickle charge PMOS tube
Q205 and normalizing PMOS tube Q206 is in off state, to realize that fast charge power supply is powered by fast charge PMOS tube Q207；Normal work
Under operation mode 2, control signal circuit 120, which exports high-level control signal VCC-SLOW_CON, makes trickle charge field-effect tube driving circuit
134 NMOS tube Q208 is in the conductive state and keeps trickle charge PMOS tube Q205 in the conductive state, exports low level control signal
VCC-FAST_CON and VCC-DC_CON drives the NMOS tube Q203 of fast charge field-effect tube driving circuit 132 and normalizing field-effect tube
The NMOS tube Q209 of dynamic circuit 136 keeps off state, and then is in fast charge PMOS tube Q207 and normalizing PMOS tube Q206 and cuts
Only state, to realize that trickle charge power supply is powered by trickle charge PMOS tube Q205；Under normal mode of operation 3, control signal circuit 120 is defeated
Out high-level control signal VCC-DC_CON keep the NMOS tube Q209 of normalizing field-effect tube driving circuit 136 in the conductive state and
Keep normalizing PMOS tube Q206 in the conductive state, output low level control signal VCC-FAST_CON and VCC-SLOW_CON make fastly
The NMOS tube Q208 of the NMOS tube Q203 and trickle charge field-effect tube driving circuit 134 that fill field-effect tube driving circuit 132 keep cutting
Only state, and then fast charge PMOS tube Q207 and trickle charge PMOS tube Q205 is made to be in off state, to realize normalizing power supply by normal
Fiery PMOS tube Q206 power supply.In the normal mode of operation, pass through voltage FAST_ detected by comparison power sense circuit 110
CHAGER-V, SLOW_CHARGER-V, AUX-BATT-V are compared with 12V-BAT-V respectively, to determine that fast charge field-effect tube drives
Whether circuit 132, trickle charge field-effect tube driving circuit 134 and normalizing field-effect tube driving circuit 136 are working properly.
Under anomalous operating mode, the abnormal signal of control signal circuit 120 is input to for MCU.For this abnormal work
Mode takes under type such as to control: when MCU is input to the abnormal signal of control signal circuit 120, due to control signal circuit
120 use 3-8 decoder working method, control signal VCC-FAST_CON, VCC-SLOW_CON and VCC-DC_ in any case
CON only has unique high level to exist, and effectively avoids control signal VCC-FAST_CON, VCC-SLOW_CON and VCC-
Caused fast charge field-effect tube driving circuit 132, the driving of trickle charge field-effect tube when more than the two being simultaneously high level in DC_CON
Circuit 134 and 136 two of them of normalizing field-effect tube driving circuit or three simultaneously turn on caused by short circuit problem.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The several embodiments of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the concept of this application, various modifications and improvements can be made, these belong to the protection of the application
Range.Therefore, the scope of protection shall be subject to the appended claims for the application patent.
Claims (10)
1. a kind of power control circuit of electric vehicle battery management system, which is characterized in that including power sense circuit, control
Signal circuit and two or more field-effect tube driving circuits, the input terminal point of each field-effect tube driving circuit
Different types of charge power supply Yong Yu not be connected, the control terminal of each field-effect tube driving circuit is all connected with the control signal
The output end of circuit, each field-effect tube driving circuit is all connected with the power supply of control circuit, and the power sense circuit is used for
The charge power supply and peripheral control unit are connected, the control signal circuit is used to connect the peripheral control unit,
The power sense circuit is used to detect the output voltage of the charge power supply, and will test result and be sent to the outside
Controller；The control signal circuit is used to receive the control instruction that the peripheral control unit is sent according to the testing result,
The highest charge power supply of output voltage in different types of charge power supply is obtained according to the control instruction, and sends driving signal
To the field-effect tube driving circuit of the connection highest charge power supply of output voltage；The field-effect tube driving circuit is receiving
Conducting when stating driving signal accesses the output voltage of the charge power supply of connection and to the power supply power supply of the control circuit.
2. power control circuit according to claim 1, which is characterized in that the charge power supply includes fast charge power supply, slow
Charging source and normalizing power supply, the field-effect tube driving circuit include fast charge field-effect tube driving circuit, the drive of trickle charge field-effect tube
The input terminal of dynamic circuit and normalizing field-effect tube driving circuit, the fast charge field-effect tube driving circuit connects the charging quickly
Source, output end connect the power supply of the control circuit, and control terminal connects the control signal circuit；The trickle charge field-effect tube is driven
The input terminal of dynamic circuit connects the trickle charge power supply, and output end connects the power supply of the control circuit, and control terminal connects the control
Signal circuit processed；The input terminal of the normalizing field-effect tube driving circuit connects the normalizing power supply, and output end connects the control
The power supply of circuit processed, control terminal connect the control signal circuit.
3. power control circuit according to claim 2, which is characterized in that the fast charge field-effect tube driving circuit includes
Field-effect tube Q203, field-effect tube Q207, resistance R218, resistance R236, resistance R239, resistance R240, voltage-stabiliser tube D203 and electricity
Hold C0603,
Input terminal of the first end of the field-effect tube Q207 as the fast charge field-effect tube driving circuit, the field-effect tube
Output end of the second end of Q207 as the fast charge field-effect tube driving circuit, and pass through the resistance R218 connection field
The control terminal of effect pipe Q207, the cathode of the voltage-stabiliser tube D203 connect the second end of the field-effect tube Q207, anode connection
The control terminal of the field-effect tube Q207；The control terminal of the field-effect tube Q207 passes through the resistance R236 connection field effect
Should pipe Q203 first end, the second end ground connection of the field-effect tube Q203, the control terminal of the field-effect tube Q203 connects institute
One end of resistance R239 is stated, and is grounded by the capacitor C0603, the other end of the resistance R239 is imitated as the fast charge field
The control terminal of tube drive circuit is answered, and is grounded by the resistance R240.
4. power control circuit according to claim 2, which is characterized in that the trickle charge field-effect tube driving circuit includes
Field-effect tube Q205, field-effect tube Q208, resistance R216, resistance R234, resistance R220, resistance R222, voltage-stabiliser tube D201 and electricity
Hold C221,
Input terminal of the first end of the field-effect tube Q205 as the trickle charge field-effect tube driving circuit, the field-effect tube
Output end of the second end of Q205 as the trickle charge field-effect tube driving circuit, and pass through the resistance R216 connection field
The control terminal of effect pipe Q205, the cathode of the voltage-stabiliser tube D201 connect the second end of the field-effect tube Q205, anode connection
The control terminal of the field-effect tube Q205；The control terminal of the field-effect tube Q205 passes through the resistance R234 connection field effect
Should pipe Q208 first end, the second end ground connection of the field-effect tube Q208, the control terminal of the field-effect tube Q208 connects institute
One end of resistance R220 is stated, and is grounded by the capacitor C221, the other end of the resistance R220 is imitated as the trickle charge field
The control terminal of tube drive circuit is answered, and is grounded by the resistance R222.
5. power control circuit according to claim 2, which is characterized in that the normalizing field-effect tube driving circuit includes
Field-effect tube Q206, field-effect tube Q209, resistance R217, resistance R235, resistance R237, resistance R238, voltage-stabiliser tube D202 and electricity
Hold C222,
Input terminal of the first end of the field-effect tube Q206 as the normalizing field-effect tube driving circuit, the field-effect tube
Output end of the second end of Q206 as the normalizing field-effect tube driving circuit, and pass through the resistance R217 connection field
The control terminal of effect pipe Q206, the cathode of the voltage-stabiliser tube D202 connect the second end of the field-effect tube Q206, anode connection
The control terminal of the field-effect tube Q206；The control terminal of the field-effect tube Q206 passes through the resistance R235 connection field effect
Should pipe Q209 first end, the second end ground connection of the field-effect tube Q209, the control terminal of the field-effect tube Q209 connects institute
One end of resistance R237 is stated, and is grounded by the capacitor C222, the other end of the resistance R237 is imitated as the normalizing field
The control terminal of tube drive circuit is answered, and is grounded by the resistance R238.
6. power control circuit according to claim 2, which is characterized in that the power sense circuit includes fast charge power supply
Detection circuit, trickle charge power sense circuit, normalizing power sense circuit and system power supply detection circuit, the fast charge power detecting
Fast charge power supply and the peripheral control unit described in circuit connection, the trickle charge power sense circuit connect the trickle charge power supply and institute
Peripheral control unit is stated, the normalizing power sense circuit connects the normalizing power supply and the peripheral control unit, the system electricity
Power sense circuit connects the power supply and the peripheral control unit of the control circuit.
7. power control circuit according to claim 6, which is characterized in that the fast charge power sense circuit includes resistance
R244, resistance R245, resistance R246, capacitor C230, capacitor C231, voltage-stabiliser tube D218 and voltage-stabiliser tube D219, the resistance R244
With resistance R245 series connection and common end by the resistance R246 connects the peripheral control unit, and the resistance R244's is another
One end connects the fast charge power supply, the other end ground connection of the resistance R245；One end of the capacitor C230 and the capacitor
One end of C231 is separately connected the both ends the resistance R246, the other end of the other end of the capacitor C230 and the capacitor C231
It is grounded；The cathode of the voltage-stabiliser tube D218 connects the anode of the voltage-stabiliser tube D219, the plus earth of the voltage-stabiliser tube D218,
The cathode of the voltage-stabiliser tube D219 connects power access end, and the common end of the voltage-stabiliser tube D218 and the voltage-stabiliser tube D219 connect
Connect the common end of the resistance R246 and the peripheral control unit.
8. power control circuit according to claim 6, which is characterized in that the trickle charge power sense circuit includes resistance
R200, resistance R202, resistance R201, capacitor C201, capacitor C200, voltage-stabiliser tube D204 and voltage-stabiliser tube D200, the resistance R200
With resistance R202 series connection and common end by the resistance R201 connects the peripheral control unit, and the resistance R200's is another
One end connects the trickle charge power supply, the other end ground connection of the resistance R202；One end of the capacitor C201 and the capacitor
One end of C200 is separately connected the both ends the resistance R201, the other end of the other end of the capacitor C201 and the capacitor C201
It is grounded；The cathode of the voltage-stabiliser tube D200 connects the anode of the voltage-stabiliser tube D204, the plus earth of the voltage-stabiliser tube D200,
The cathode of the voltage-stabiliser tube D204 connects power access end, and the common end of the voltage-stabiliser tube D200 and the voltage-stabiliser tube D204 connect
Connect the common end of the resistance R201 and the peripheral control unit.
9. power control circuit according to claim 6, which is characterized in that the normalizing power sense circuit includes resistance
R241, resistance R242, resistance R243, capacitor C224, capacitor C20604, voltage-stabiliser tube D216 and voltage-stabiliser tube D217, the resistance
R241 connects with the resistance R242 and common end by the resistance R243 connects the peripheral control unit, the resistance R241
The other end connect the normalizing power supply, the other end ground connection of the resistance R242；One end of the capacitor C224 and the electricity
The one end for holding C0604 is separately connected the both ends the resistance R243, and the other end of the capacitor C224 and the capacitor C0604's is another
One end is grounded；The cathode of the voltage-stabiliser tube D217 connects the anode of the voltage-stabiliser tube D216, the anode of the voltage-stabiliser tube D217
Ground connection, the cathode of the voltage-stabiliser tube D216 connect power access end, and the public affairs of the voltage-stabiliser tube D217 and the voltage-stabiliser tube D216
End connects the common end of the resistance R243 and the peripheral control unit altogether.
10. power control circuit according to claim 6, which is characterized in that the system power supply detection circuit includes electricity
Hinder R247, resistance R248, resistance R221, capacitor C232, capacitor C225, voltage-stabiliser tube D224 and voltage-stabiliser tube D225, the resistance
R247 connects with the resistance R248 and common end by the resistance R221 connects the peripheral control unit, the resistance R247
The other end connect the power supply of the control circuit, the other end ground connection of the resistance R248；One end of the capacitor C232 and
One end of the capacitor C225 is separately connected the both ends the resistance R221, the other end of the capacitor C232 and the capacitor C225
The other end be grounded；The cathode of the voltage-stabiliser tube D224 connects the anode of the voltage-stabiliser tube D225, the voltage-stabiliser tube D224's
Plus earth, the cathode of the voltage-stabiliser tube D225 connect power access end, and the voltage-stabiliser tube D224 and voltage-stabiliser tube D225
Common end connect the common end of the resistance R221 and the peripheral control unit.
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| CN201810987116.7A CN109177732B (en) | 2018-08-28 | 2018-08-28 | Power supply control circuit of electric vehicle battery management system |
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| CN201810987116.7A CN109177732B (en) | 2018-08-28 | 2018-08-28 | Power supply control circuit of electric vehicle battery management system |
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| CN109177732B (en) | 2020-11-17 |
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