CN110015140A - Electric car and its power circuit - Google Patents
Electric car and its power circuit Download PDFInfo
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- CN110015140A CN110015140A CN201711236089.1A CN201711236089A CN110015140A CN 110015140 A CN110015140 A CN 110015140A CN 201711236089 A CN201711236089 A CN 201711236089A CN 110015140 A CN110015140 A CN 110015140A
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- low
- voltage
- direct current
- pressure side
- module
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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
- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
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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
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
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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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a kind of electric car and its power circuits, the circuit includes: two-way DC/DC module, including the first converter unit, the first transformer and the second converter unit, high-pressure side of the side of first converter unit as two-way DC/DC module, low-pressure side of the side of second converter unit as two-way DC/DC module, first transformer includes the first side and second side, first side includes at least one centre tap, and one end of the first side and each centre tap pass through corresponding first controllable switch respectively and be connected with the first converter unit；Control module, it is controlled for the switch state to the first converter unit, the second converter unit and each first controllable switch, the first direct current provided by power battery is converted to the second direct current, and the second direct current is supplied to by A-battery and/or low-voltage load by low-pressure side, or the 4th direct current will be converted to by the third direct current of A-battery provided, and the 4th direct current is supplied to by high-voltage load by high-pressure side.
Description
Technical field
The present invention relates to automobile technical field, in particular to the power circuit and a kind of electric car of a kind of electric car.
Background technique
Currently, high-tension battery can only be generally converted into voltage by common DC conversion power DC-DC on integral new-energy passenger
It is an one-way only operation product for the power supply of 28V.Therefore, it if giving other power supplys or load supplying, such as gives in a short time
Steering controller provides the power supply that a voltage swing is 400V, needs in addition to increase a DC conversion power DC-DC.
However, due to two DC conversion power DC-DC be it is individually designed, it is general without simultaneously in the actual working process
It is working time, therefore, lower to its utilization efficiency, not only waste of resource, but also increase production cost.
Summary of the invention
The present invention is directed to solve one of the technical problem in above-mentioned technology at least to a certain extent.For this purpose, of the invention
One purpose is to propose a kind of power circuit of electric car, can be provided not according to different batteries or the needs of load
With the direct current of voltage swing, to carry out distribution to different batteries or load, structure is simple, lower production costs.
Second object of the present invention is to propose a kind of electric car.
In order to achieve the above objectives, first aspect present invention embodiment proposes a kind of power circuit of electric car, comprising:
Two-way DC/DC module, the two-way DC/DC module includes the first converter unit, the first transformer and the second converter unit, described
High-pressure side of the side of first converter unit as the two-way DC/DC module, respectively with the power battery of the electric car
Be connected with high-voltage load, low-pressure side of the side of second converter unit as the two-way DC/DC module, respectively with it is described
The A-battery of electric car is connected with low-voltage load, and first transformer includes the first side and second side, first side
Including at least one centre tap, one end of first side and each centre tap pass through corresponding first controllable switch respectively
It is connected with first converter unit；Sampling module, the sampling module is for sampling the on high-tension side voltage, the high pressure
The electric current of the electric current of the voltage of side, the voltage of the low-pressure side and the low-pressure side；Control module, the control module are used for root
According to the on high-tension side voltage, the electric current of the on high-tension side voltage, the voltage of the low-pressure side and the low-pressure side electric current
The switch state of first converter unit, second converter unit and each first controllable switch is controlled,
The second direct current is converted to the first direct current of the power battery for inputting the high-pressure side, and passes through the low-pressure side
Second direct current is supplied to the A-battery and/or low-voltage load, or the low-pressure side is inputted described low
The third direct current of piezoelectric battery is converted to the 4th direct current, and the 4th direct current is supplied the height by the high-pressure side
Pressure load, wherein the voltage of first direct current is greater than the voltage of second direct current, the voltage of the third direct current
Less than the voltage of the 4th direct current.
The power circuit of electric car according to an embodiment of the present invention, the height that control module is sampled according to sampling module
Press the electric current of the voltage of side, on high-tension side electric current, the voltage of low-pressure side and low-pressure side to the first converter unit, the second converter unit
Controlled with the switch state of each first controllable switch, will be inputted from high-pressure side provided by power battery it is first straight
Galvanic electricity is converted to the second direct current, and the second direct current is supplied to A-battery and/or low-voltage load by low-pressure side, or
The third direct current provided by A-battery inputted from low-pressure side is converted into the 4th direct current, and passes through high-pressure side for the 4th
Direct current supplies high-voltage load.As a result, by controlling a two-way DC/DC module, can according to different battery or
The needs of load provide the direct current of different voltages size, and to carry out distribution to different batteries or load, structure is simple, raw
Cost is relatively low for production.
In order to achieve the above objectives, second aspect of the present invention embodiment proposes a kind of electric car comprising the present invention the
The power circuit for the electric car that one side embodiment proposes.
Electric car according to an embodiment of the present invention can be according to not by controlling a two-way DC/DC module
The needs of same battery or load, provide the direct current of different voltages size, to carry out distribution, knot to different batteries or load
Structure is simple, lower production costs.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
It obtains obviously, or by recognizing practice of the invention.
Detailed description of the invention
Fig. 1 is according to the electric car of the embodiment of the present invention and its block diagram of power circuit；
Fig. 2 is according to the electric car of one embodiment of the invention and its structural schematic diagram of power circuit.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
The electric car and its power circuit of the embodiment of the present invention described with reference to the accompanying drawing.
Fig. 1 is according to the electric car of the embodiment of the present invention and its block diagram of power circuit.
As shown in Figure 1, the power circuit of the electric car of the embodiment of the present invention, including two-way DC/DC module 10, sampling mould
Block 20 and control module 30, two-way DC/DC module 10 include the first converter unit 100, the transformation list of the first transformer T1 and second
Member 200.
Wherein, high-pressure side of the side of the first converter unit 100 as two-way DC/DC module 10, respectively with electric car
Power battery be connected with high-voltage load, low-pressure side of the side of the second converter unit 200 as two-way DC/DC module 10, point
It is not connected with the A-battery of electric car and low-voltage load, the first transformer T1 includes the first side and second side, the first side packet
At least one centre tap is included, one end of the first side and each centre tap pass through corresponding first controllable switch and first respectively
Converter unit 100 is connected；Sampling module 20 is used to sample on high-tension side voltage, on high-tension side electric current, the voltage of low-pressure side and low
Press the electric current of side；Control module 30 is used for according on high-tension side voltage, on high-tension side electric current, the voltage of low-pressure side and low-pressure side
Electric current controls the switch state of the first converter unit 100, the second converter unit 200 and each first controllable switch, with
The second direct current is converted to by the first direct current that power battery provides by what is inputted from high-pressure side, and passes through low-pressure side for second
Direct current is supplied to A-battery and/or low-voltage load, or the third provided by A-battery inputted from low-pressure side is straight
Galvanic electricity is converted to the 4th direct current, and the 4th direct current is supplied high-voltage load by high-pressure side, wherein the electricity of the first direct current
Pressure is greater than the voltage of the second direct current, the voltage of the voltage of third direct current less than the 4th direct current.
Further, the power circuit of electric car further include the second controllable switch K2 and first diode D1, third can
Control switch K3.
Wherein, one end of the second controllable switch K2 is connected with power battery, and the anode of first diode D1 and second is controllably
The other end of switch K2 is connected, and the cathode of first diode D1 is connected to high-pressure side；One end of third controllable switch K3 and high pressure
Load is connected, and the other end of third controllable switch K3 is connected to high-pressure side.
In one embodiment of the invention, as shown in Fig. 2, the first converter unit 100 include by first switch tube Q1 and
First bridge arm of second switch Q2 composition, the second bridge arm being made of third switching tube Q3 and the 4th switching tube Q4, the first bridge
Arm and second bridge arm are parallel with one another, and the both ends of the first bridge arm are respectively as on high-tension side first DC terminal and the second direct current
End；The other end of the first side of first transformer T1 is connected to the first segment between first switch tube Q1 and second switch Q2
Point, one end of the first side and each centre tap are connected to third switching tube Q3 by corresponding first controllable switch 300 respectively
And the 4th second node between switching tube Q4；Second converter unit 200 includes the 5th switching tube Q5 and the 6th switching tube Q6, the
One end of five switching tube Q5 is connected with one end of second side, and one end of the 6th switching tube Q6 is connected with the other end of second side, the
The first DC terminal of the other end of five switching tube Q5 and the other end of the 6th switching tube Q6 as low-pressure side, the intermediate of second side are taken out
Second DC terminal of the head as low-pressure side.
In one embodiment of the invention, as shown in Fig. 2, the first side of the first transformer T1 may include n intermediate pumping
Head (n be more than or equal to 1), and each centre tap can respectively correspond first controllable switch 300 (including controllable switch K1a,
Controllable switch K2a ..., controllable switch K1a and controllable switch Kna is only shown in controllable switch Kna, Fig. 2), pass through control first
The switch state of controllable switch 300 can accordingly change the effective turn of the first the first side transformer T1, i.e. the first transformer T1
First flanks the number of turns into circuit, to change the turn ratio of the first the first side of transformer and first transformer second side.
In one embodiment of the invention, control module 30 is controllable for controlling the second controllable switch K2 closure, third
Switch K3 is disconnected, and corresponding first controllable switch is controlled when on high-tension side voltage is in the first predetermined voltage range
Closure, and control two-way DC/DC module 10 starting decompression work will input the provided by power battery from high-pressure side
One direct current is converted to the second direct current, and the second direct current is supplied to A-battery and/or low-voltage load by low-pressure side.
Wherein, A-battery and the value range of low-voltage load voltage can be 12~48V, such as the voltage of A-battery can be 24V, low
The voltage of pressure load can be 28V.
In one embodiment of the invention, control module 30 is closed in the second controllable switch K2, and receives cell tube
After the instruction that allows to discharge of reason system, corresponding given initial duty cycle can be exported by the to first to the 6th switching tube respectively
Pwm signal, and the duty ratio of each pwm signal is adjusted according to the voltage of low-pressure side and the electric current of low-pressure side, with control
The two-way starting of DC/DC module 10 decompression work.
Wherein, when on high-tension side voltage Uhbt is in the first predetermined voltage range, according on high-tension side voltage Uhbt
Difference, can control corresponding first controllable switch to be closed, to change first the first side of transformer and the first transformer the
The turn ratio of two sides.For example, when on high-tension side voltage Uhbt increase when, i.e., on high-tension side voltage Uhbt1, Uhbt2 ..., Uhbtn
When being sequentially increased (on high-tension side voltage Uhbt can for Uhbt1, Uhbt2 ..., Uhbtn), can accordingly control controllable switch K1a,
Controllable switch K2a ... controllable switch Kna is successively closed, and is controlled other controllable switches and disconnected, to increase the first transformer first
The turn ratio of side and first transformer second side, so as to obtain an ideal voltage in second side of the first transformer
Value.
In one particular embodiment of the present invention, control module 30 can control the second controllable switch K2 closure, and control
Third controllable switch K3 is disconnected, at this point, the first direct current provided by power battery can be from double by the second controlled tr tube K2
It is inputted to the high-pressure side of DC/DC module 10.As shown in Fig. 2, sampling module 20 can be integrally disposed in control module 30, work as sampling
The on high-tension side voltage Uhbt1 that module 20 samples is smaller, and when in the first predetermined voltage range, control module 30 is controllable
Controlled tr tube K1a processed closure, and control module 30 can respectively by the PWM1 signal of given initial duty cycle, PWM2 signal,
(wherein, PWM1 signal may include complementary PWM1A signal and PWM1B signal, and PWM2 signal can wrap for PWM3 signal, PWM4 signal
Complementary PWM2A signal and PWM2B signal are included, PWM3 signal may include PWM3A signal, and PWM4 signal can be PWM4A signal, and
PWM1A signal is synchronous with PWM2B signal, and PWM1B signal is synchronous with PWM2A signal) accordingly input first switch tube Q1, second
Switching tube Q2, third switching tube Q3, the 4th switching tube Q4, first switch tube Q5 and first switch tube Q6, i.e. PWM1A signal can be defeated
Enter first switch tube Q1, PWM1B signal can input second switch Q2, and PWM2A signal can input third switching tube Q3, PWM2B
Signal can input the 4th switching tube Q4, and PWM3A signal can input the 5th switching tube Q5, and PWM4A signal can input the 6th switching tube
Q6, so that first switch tube Q1 and the 4th switching tube Q4 are simultaneously turned on or turned off, second switch Q2 and third switching tube Q3 are same
When on or off and the 5th switching tube Q5 and the 6th switching tube Q6 sequentially turn on or turn off.The provided by power battery
One direct current is in the filtering by filter capacitor C1, and by first switch tube Q1 and the 4th switching tube Q4 (or second switch
Pipe Q2 and third switching tube Q3) partial pressure, and be depressured by the first transformer T1, and open by the 5th switching tube Q5 or the 6th
The partial pressure of pipe Q6 is closed, and after the filtering of filter capacitor C2, the second direct current can be exported from the low-pressure side of two-way DC/DC module 10
Electricity.Control module 30 samples the voltage and current of the second obtained direct current according to sampling module 20, and passes through internal PID control
System can real-time update complementation PWM1A signal and PWM1B signal, complementary PWM2A signal and PWM2B signal and PWM3 believe
Number and PWM4 signal duty ratio, to adjust the size of the voltage of corresponding switching tube, to adjust from two-way DC/DC module 10
Low-pressure side output the second direct current so that second direct current meets the needs of A-battery and/or low-voltage load.This
Two direct currents are provided to A-battery to charge to A-battery, be also provided to low-voltage load with to low-voltage load into
Row power supply simultaneously can also charge and be powered low-voltage load to A-battery.
In addition, the output of PFM (Pulse Frequency Modulation, pulse frequency modulated) control mode also can be used
The complementary PWM1A signal and PWM1B signal of fixed duty cycle, complementary PWM2A signal and PWM2B signal and PWM3A letter
Number with PWM4A signal (PWM1A signal is synchronous with PWM2B, and PWM1B signal is synchronous with PWM2A signal), to control first switch tube
Q1 and the 4th switching tube Q4 are simultaneously turned on or are turned off, and second switch Q2 and third switching tube Q3 are simultaneously turned on or turned off, and
5th switching tube Q5 and the 6th switching tube Q6 are sequentially turned on or are turned off, and can be by adjusting pwm signal corresponding with each switching tube
Frequency changes the voltage of first switch tube Q1 and the 4th switching tube Q4, and changes second switch Q2 and third switching tube Q3
Voltage, and change the voltage of the 5th switching tube Q5 or the 6th switching tube Q6, to adjust from the low pressure of two-way DC/DC module 10
Second direct current of side output, so that second direct current meets the needs of A-battery and/or low-voltage load.Second direct current
Electricity is provided to A-battery to charge to A-battery, is provided to low-voltage load also to supply low-voltage load
Electricity simultaneously can also charge and be powered low-voltage load to A-battery.
It is straight thereby, it is possible to which higher first direct current of the voltage provided by power battery is converted to voltage lower second
Galvanic electricity to charge to A-battery, or is powered low-voltage load, or not only charge but also to low pressure to A-battery
Load is powered.
In other embodiments of the invention, it is pre- that the on high-tension side voltage Uhbt2 that sampling module 20 samples is in first
If when in voltage range, control module 30 can control controlled tr tube K2a to be closed, the on high-tension side electricity that sampling module 20 samples
When pressure Uhbt3 is in the first predetermined voltage range, control module 30 can control controlled tr tube K3a to be closed ..., sampling module
When the 20 on high-tension side voltage Uhbtn sampled are in the first predetermined voltage range, control module 30 can control controllable switch
Pipe Kna closure, at this point, the method in through the foregoing embodiment the first direct current provided by power battery is converted to meet it is low
The second direct current of demand of piezoelectric battery and/or low-voltage load.As a result, in a certain range, different voltages range will can be in
The first direct current provided by power battery be converted to the second direct current, to charge to A-battery, or negative to low pressure
Load is powered, or not only charge to A-battery but also be powered to low-voltage load.
Further, control module 30 can control third controllable switch K3 be closed, and control the first controlled tr tube K1 and
Second controlled tr tube K2 still maintains closed state, and two-way DC/DC module 10 still starts decompression work, through the foregoing embodiment
Method to the after inputting from high-pressure side and being handled by the first direct current that power battery provides, still can be converted thereof into
Two direct currents, and A-battery and/or low-voltage load are provided it to, meanwhile, it is provided from what high-pressure side inputted by power battery
The first direct current can also pass through two-way DC/DC module 10 and third controllable switch K3, and high-voltage load is supplied to, to high pressure
Load is powered.
In one embodiment of the invention, for controlling, the second controllable switch K2 is closed control module, third is controllably opened
K3 closure is closed, and controls two-way DC/DC module 10 and does not start work, the first direct current is supplied to high-voltage load.
That is, when control module 30 controls the first controllable switch K1 and the second controllable switch K2 closure, and control double
When not starting work to DC/DC module, the first controllable switch K1, the one or two pole are passed through by the first direct current that power battery provides
Pipe D1, two-way DC/DC module 10 and the second controllable switch K2, it is possible to provide give high-voltage load.Thereby, it is possible to will be mentioned by power battery
The first direct current supplied is supplied to high-voltage load, individually to be powered to high-voltage load.
In one embodiment of the invention, the power circuit of electric car further includes the 4th controllable switch K4, and the 4th can
One end of control switch K4 is connected with low-voltage load, and the other end of the 4th controllable switch K4 is connected to low-pressure side.
In one embodiment of the invention, control module 30 is receiving boost instruction or is judging two-way DC/DC module
When 10 high side voltage exception, such as the high side voltage of two-way DC/DC module 10 reduces extremely, needs to be powered it
When, it can determine whether two-way DC/DC module 10 is currently carrying out decompression work, and current in two-way DC/DC module 10
When carrying out decompression work, stop the to first to the 6th switching tube output pwm signal, and disconnected controlling the second controllable switch K2
It opens, after third controllable switch K3 closure, gives initial duty to the output of the described first to the 6th switching tube is corresponding respectively again
The pwm signal of ratio, and the duty ratio of each pwm signal is adjusted according to the voltage of low-pressure side and the electric current of low-pressure side, with
Control the two-way starting of DC/DC module 10 boosting work.
In one embodiment of the invention, control module 30 for control third controllable switch K3 closure, and according to
The voltage of low-pressure side controls corresponding first controllable switch closure, and control pair when being in the second predetermined voltage range
Start boosting work to DC/DC module 10, the third direct current provided by A-battery inputted from low-pressure side is converted to
4th direct current, and the 4th direct current is supplied to by high-voltage load by high-pressure side, and third direct current is supplied to low pressure
Load.Wherein, the value range of the voltage of power battery and high-voltage load can be 300~700V, such as power battery and high pressure
The voltage of load can be 400V or 600V.
Wherein, the effective turn of the voltage rating of low-voltage load and the first side after corresponding first controllable switch closure
Negative correlation can be closed that is, when the voltage rating of low-voltage load reduces by controlling corresponding first controllable switch
It closes, increases the effective turn of the first side, to increase the turn ratio of the first transformer the first side and second side.
It is understood that when the voltage Ulbt of low-pressure side is in the second predetermined voltage range, according to low-pressure side
The difference of voltage Ulbt can control corresponding first controllable switch to be closed, for example, the voltage Ulbt when low-pressure side reduces
When, i.e. voltage Ulbt1, Ulbt2 of low-pressure side ..., Ulbtn is when being sequentially reduced (the voltage Ulbt of low-pressure side can for Ulbt1,
Ulbt2 ..., Ulbtn), can accordingly control controllable switch K1a, controllable switch K2a ... controllable switch Kna is successively closed, and control
It makes other controllable switches to disconnect, to increase the turn ratio of the first transformer the first side and second side, so as to make the first transformation
The voltage of the first side of device output keeps stablizing.
In one particular embodiment of the present invention, control module 30 can control third controllable switch K3 to be closed, at this point, by
The third direct current that A-battery provides can be inputted from the low-pressure side of two-way DC/DC module 10, and the sampling of sampling module 20 obtains
The voltage Ulbt1 of low-pressure side is in the second predetermined voltage range, can accordingly be controlled controlled tr tube K1a closure, be controlled mould
Block 30 can respectively believe the PWM1A signal of given initial duty cycle, PWM1B signal, PWM2A signal, PWM2B signal, PWM3A
Number, PWM4A signal accordingly input first switch tube Q1, second switch Q2, third switching tube Q3, the 4th switching tube Q4,
One switching tube Q5 and first switch tube Q6, so that first switch tube Q5 or first switch tube Q6 are sequentially turned on or turned off, first is opened
It closes pipe Q1 and the 4th switching tube Q4 to simultaneously turn on or turn off, second switch Q2 and third switching tube Q3 are simultaneously turned on or turned off.
5th switching tube Q5 or the 6th switching tube Q6 is passed through by the third direct current that A-battery provides, and passes through the first transformer T1 liter
Pressure can be from double and after first switch tube Q1 and the 4th switching tube Q6 (or second switch Q2 and third switching tube Q3)
The 4th direct current is exported to the high-pressure side of DC/DC module 10, it is straight that control module 30 samples the 4th obtained according to sampling module 20
The voltage and current of galvanic electricity, and by internal PID control can real-time update PWM1A signal, PWM1B signal, PWM2A signal,
The duty ratio of PWM2B signal, PWM3A signal, PWM4A signal, to adjust the size of the voltage of corresponding switching tube, to adjust
The 4th direct current exported from the high-pressure side of two-way DC/DC module 10, so that the 4th direct current meets the needs of high-voltage load,
And the 4th direct current is supplied to high-voltage load as high-voltage load power supply.
In addition, the PWM1A signal of PFM control mode output fixed duty cycle, PWM1B signal, PWM2A letter also can be used
Number, PWM2B signal, PWM3A signal and PWM4A signal so that first switch tube Q5 or first switch tube Q6 are sequentially turned on or are closed
Disconnected, first switch tube Q1 and the 4th switching tube Q4 are simultaneously turned on or are turned off, and second switch Q2 and third switching tube Q3 are led simultaneously
Logical or shutdown, and can change the 5th switching tube Q5's or the 6th switching tube Q6 by the frequency of two groups of complementary pwm signals of adjusting
Voltage, and change the voltage of first switch tube Q1 and the 4th switching tube Q4, and change second switch Q2 and third switching tube
The voltage of Q3, so that the 4th direct current exported from the high-pressure side of two-way DC/DC module 10 is adjusted, so that the 4th direct current is full
The demand of sufficient high-voltage load, and the 4th direct current is supplied to high-voltage load as high-voltage load power supply.
In other embodiments of the invention, it is pre- that the voltage Ulbt2 for the low-pressure side that sampling module 20 samples is in second
If when in voltage range, control module 30 can control controlled tr tube K2a to be closed, the electricity for the low-pressure side that sampling module 20 samples
When pressure Ulbt3 is in the second predetermined voltage range, control module 30 can control controlled tr tube K3a to be closed ..., sampling module
When the voltage Ulbtn of 20 low-pressure sides sampled is in the second predetermined voltage range, control module 30 can control controllable switch
Pipe Kna closure, at this point, the third direct current provided by A-battery is converted to satisfaction height by the method in through the foregoing embodiment
Press the 4th direct current of loading demand.It as a result, in a certain range, being capable of being provided by A-battery by different voltages ranges
Third direct current is converted to the 4th direct current, to be powered to high-voltage load.
Further, when control module 30 can control the 4th controllable switch K4 closure, at this point, provided by A-battery
The lower third direct current of voltage is convertible into higher 4th direct current of voltage, and is supplied to high-voltage load, with negative to high pressure
Load is powered, meanwhile, third direct current can also be provided to low-voltage load, to be powered to low-voltage load.
In one embodiment of the invention, the control module 30 is for controlling the 4th controllable switch K4 closure, and controls
It makes two-way DC/DC module and does not start work, third direct current is supplied to low-voltage load.
That is, when control module 30 controls the 4th controllable switch K4 closure, and control two-way DC/DC module 10 and do not open
When starting building to make, the 4th controllable switch K4 and two-way DC/DC module 10 are passed through by the third direct current that A-battery provides, it is possible to provide
To low-voltage load, thereby, it is possible to the third direct currents that will be provided by A-battery to be supplied to low-voltage load, with to low-voltage load into
Row individually power supply.
The power circuit of electric car according to an embodiment of the present invention, the height that control module is sampled according to sampling module
Press the electric current of the voltage of side, on high-tension side electric current, the voltage of low-pressure side and low-pressure side to the first converter unit, the second converter unit
It is controlled with the switch state of each first controllable switch, the first direct current conversion for the power battery that high-pressure side is inputted
For the second direct current, and the second direct current is supplied to by A-battery and/or low-voltage load by low-pressure side, or by low-pressure side
The third direct current of the A-battery of input is converted to the 4th direct current, and is born the 4th direct current supply high pressure by high-pressure side
It carries.As a result, by controlling a two-way DC/DC module, can be provided not according to different batteries or the needs of load
With the direct current of voltage swing, to carry out distribution to different batteries or load, structure is simple, lower production costs.
Corresponding above-described embodiment, the invention also provides a kind of electric cars.
The electric car of the embodiment of the present invention includes the power circuit for the electric car that the above embodiment of the present invention proposes,
Specific embodiment can refer to above-described embodiment, and to avoid redundancy, details are not described herein.
Electric car according to an embodiment of the present invention can be according to not by controlling a two-way DC/DC module
The needs of same battery or load, provide the direct current of different voltages size, to carry out distribution, knot to different batteries or load
Structure is simple, lower production costs.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more,
Unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (12)
1. a kind of power circuit of electric car characterized by comprising
Two-way DC/DC module, the two-way DC/DC module include the first converter unit, the first transformer and the second converter unit,
High-pressure side of the side of first converter unit as the two-way DC/DC module, respectively with the power of the electric car
Battery is connected with high-voltage load, low-pressure side of the side of second converter unit as the two-way DC/DC module, respectively with
The A-battery of the electric car is connected with low-voltage load, and first transformer includes the first side and second side, and described the
Side includes at least one centre tap, and one end of first side and each centre tap pass through corresponding first controllably respectively
Switch is connected with first converter unit；
Sampling module, the sampling module is for sampling the on high-tension side voltage, the on high-tension side electric current, the low-pressure side
Voltage and the low-pressure side electric current；
Control module, the control module are used for according to the on high-tension side voltage, the on high-tension side electric current, the low-pressure side
Voltage and the low-pressure side electric current to first converter unit, second converter unit and each described first controllable
The switch state of switch is controlled, and the first direct current provided by the power battery inputted from the high-pressure side is turned
It is changed to the second direct current, and second direct current is supplied to by the A-battery by the low-pressure side and/or low pressure is born
It carries, or the third direct current provided by the A-battery inputted from the low-pressure side is converted into the 4th direct current, and
The 4th direct current is supplied into the high-voltage load by the high-pressure side, wherein the voltage of first direct current is greater than
The voltage of second direct current, the voltage of the third direct current are less than the voltage of the 4th direct current.
2. the power circuit of electric car according to claim 1, which is characterized in that
First converter unit include the first bridge arm being made of first switch tube and second switch, by third switching tube and
The second bridge arm that 4th switching tube is constituted, first bridge arm and second bridge arm are parallel with one another, and first bridge arm
Both ends are respectively as on high-tension side first DC terminal and the second DC terminal；
The other end of first side of first transformer is connected to first between the first switch tube and second switch
Node, one end of first side and each centre tap are connected to the third by corresponding first controllable switch respectively and open
Close the second node between pipe and the 4th switching tube；
Second converter unit includes the 5th switching tube and the 6th switching tube, one end and described second of the 5th switching tube
One end of side is connected, and one end of the 6th switching tube is connected with the other end of described second side, the 5th switching tube it is another
The centre tap of first DC terminal of the other end of one end and the 6th switching tube as the low-pressure side, described second side is made
For the second DC terminal of the low-pressure side.
3. the power circuit of electric car according to claim 2, which is characterized in that further include:
One end of second controllable switch and first diode, second controllable switch is connected with the power battery, and described
The anode of one diode is connected with the other end of second controllable switch, and the cathode of the first diode is connected to the height
Press side；
One end of third controllable switch, the third controllable switch is connected with the high-voltage load, the third controllable switch
The other end is connected to the high-pressure side.
4. the power circuit of electric car according to claim 3, which is characterized in that the control module is for controlling institute
State the second controllable switch closure, the third controllable switch disconnects, and is in the first predeterminated voltage in the on high-tension side voltage
Corresponding first controllable switch closure, and the control two-way DC/DC module starting decompression work are controlled when in range,
To be converted to the second direct current by the first direct current that the power battery provides for what is inputted from the high-pressure side, and pass through institute
It states low-pressure side and second direct current is supplied to the A-battery and/or low-voltage load.
5. the power circuit of electric car according to claim 3, which is characterized in that the control module is for controlling institute
Third controllable switch closure is stated, and controls corresponding one when the voltage of the low-pressure side is in the second predetermined voltage range
First controllable switch closure, and the control two-way DC/DC module starting boosting work, by what is inputted from the low-pressure side
The third direct current provided by the A-battery is converted to the 4th direct current, and passes through the high-pressure side for the 4th direct current
Electricity is supplied to the high-voltage load, and the third direct current is supplied to the low-voltage load.
6. the power circuit of electric car according to claim 5, which is characterized in that the voltage rating of the low-voltage load
With the effective turn negative correlation of first side after corresponding first controllable switch closure.
7. the power circuit of electric car according to claim 3, which is characterized in that the control module is for controlling institute
The second controllable switch closure, third controllable switch closure are stated, and controls the two-way DC/DC module and does not start work, with
First direct current is supplied to the high-voltage load.
8. the power circuit of electric car according to claim 3, which is characterized in that further include:
One end of 4th controllable switch, the 4th controllable switch is connected with the low-voltage load, the 4th controllable switch
The other end is connected to the low-pressure side.
9. the power circuit of electric car according to claim 8, which is characterized in that the control module is for controlling institute
The 4th controllable switch closure is stated, and controls the two-way DC/DC module and does not start work, the third direct current is supplied to
The low-voltage load.
10. the power circuit of electric car according to claim 4, which is characterized in that the control module is described
Two controllable switches closure, and receive battery management system allow discharge instruct after, by respectively to described first to the 6th
Switching tube exports the pwm signal of corresponding given initial duty cycle, and according to the voltage of the low-pressure side and the low-pressure side
The duty ratio of each pwm signal is adjusted in electric current, to control the two-way DC/DC module starting decompression work.
11. the power circuit of electric car according to claim 5, which is characterized in that the control module is receiving
Boost instruction or when judging the high side voltage exception of the two-way DC/DC module, judges that the two-way DC/DC module is currently
It is no to carry out decompression work, and when the two-way DC/DC module is currently carrying out decompression work, stop to described first
To the 6th switching tube output pwm signal, and control second controllable switch disconnect, third controllable switch closure
Afterwards, the pwm signal of corresponding given initial duty cycle is exported to the described first to the 6th switching tube respectively again, and according to described
The duty ratio of each pwm signal is adjusted in the voltage of low-pressure side and the electric current of the low-pressure side, to control the two-way DC/
The starting boosting work of DC module.
12. a kind of electric car, which is characterized in that the electricity including electric car described according to claim 1 any one of -11
Source circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711236089.1A CN110015140B (en) | 2017-11-30 | 2017-11-30 | Electric automobile and power supply circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711236089.1A CN110015140B (en) | 2017-11-30 | 2017-11-30 | Electric automobile and power supply circuit thereof |
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| CN110015140A true CN110015140A (en) | 2019-07-16 |
| CN110015140B CN110015140B (en) | 2021-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711236089.1A Active CN110015140B (en) | 2017-11-30 | 2017-11-30 | Electric automobile and power supply circuit thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112165131A (en) * | 2020-09-07 | 2021-01-01 | 东风柳州汽车有限公司 | New energy automobile emergency power supply system and start control method |
| CN114337263A (en) * | 2022-02-21 | 2022-04-12 | 小米汽车科技有限公司 | Electric vehicle and control power supply circuit thereof |
| WO2023050960A1 (en) * | 2021-09-30 | 2023-04-06 | 比亚迪股份有限公司 | Battery swap control method and system for vehicle, and vehicle |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1993547A (en) * | 2004-03-04 | 2007-07-04 | Tm4股份有限公司 | System and method for starting a combustion engine of a hybrid vehicle. |
| CN103635347A (en) * | 2011-06-28 | 2014-03-12 | 株式会社自动网络技术研究所 | Vehicle power source device |
| CN103683936A (en) * | 2013-12-19 | 2014-03-26 | 陕西科技大学 | Two-way digital DC-DC convertor with wide load range |
| CN106329945A (en) * | 2016-08-08 | 2017-01-11 | 王振铎 | Step-type precision voltage regulator |
-
2017
- 2017-11-30 CN CN201711236089.1A patent/CN110015140B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1993547A (en) * | 2004-03-04 | 2007-07-04 | Tm4股份有限公司 | System and method for starting a combustion engine of a hybrid vehicle. |
| CN103635347A (en) * | 2011-06-28 | 2014-03-12 | 株式会社自动网络技术研究所 | Vehicle power source device |
| CN103683936A (en) * | 2013-12-19 | 2014-03-26 | 陕西科技大学 | Two-way digital DC-DC convertor with wide load range |
| CN106329945A (en) * | 2016-08-08 | 2017-01-11 | 王振铎 | Step-type precision voltage regulator |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112165131A (en) * | 2020-09-07 | 2021-01-01 | 东风柳州汽车有限公司 | New energy automobile emergency power supply system and start control method |
| WO2023050960A1 (en) * | 2021-09-30 | 2023-04-06 | 比亚迪股份有限公司 | Battery swap control method and system for vehicle, and vehicle |
| CN114337263A (en) * | 2022-02-21 | 2022-04-12 | 小米汽车科技有限公司 | Electric vehicle and control power supply circuit thereof |
| CN114337263B (en) * | 2022-02-21 | 2022-12-02 | 小米汽车科技有限公司 | Electric vehicle and control power supply circuit thereof |
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|---|---|
| CN110015140B (en) | 2021-06-18 |
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