CN207719857U - Charge-discharge circuit for electric vehicle - Google Patents
Charge-discharge circuit for electric vehicle Download PDFInfo
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- CN207719857U CN207719857U CN201820047696.7U CN201820047696U CN207719857U CN 207719857 U CN207719857 U CN 207719857U CN 201820047696 U CN201820047696 U CN 201820047696U CN 207719857 U CN207719857 U CN 207719857U
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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
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- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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Abstract
The utility model provides a kind of charge-discharge circuit for electric vehicle, belongs to electric vehicle.Charge-discharge circuit includes：Alignment unit, isolated location, rectification unit, detection unit and controller；Alignment unit includes：First controllable switch, the second controllable switch, third controllable switch and the 4th controllable switch, the first end of first power interface is connected by the first end of the first controllable switch and isolated location, the first end of first power interface is connected by the second end of the second controllable switch and isolated location, the second end of first power interface is connected by the first end of third controllable switch and isolated location, and second end is connected by the second end of the 4th controllable switch and isolated location；The first voltage that detection unit is used to detect between the first end and second end of the first power interface is poor；Rectification unit is connect with isolated location；Controller is used to control the break-make of the first controllable switch and the 4th controllable switch or controls the break-make of the second controllable switch and third controllable switch.
Description
Technical field
The utility model is related to electric vehicles, more particularly to a kind of charge-discharge circuit for electric vehicle.
Background technology
Traditional new-energy automobile charging system generally can only be one-way only operation, i.e., can only be converted to input alternating current to new
The direct current of energy automobile power battery.The circuit general work principle is first order AC-DC (AC-DC), i.e., by alternating current
It is converted into high voltage direct current (realizing Active PFC)；Second level DC-DC (DC-DC) turns high voltage direct current
Be changed to isolation give the battery-powered direct current of power electric.Traditional circuit has a single function, and positive can only work, can not be extended to other
Function.
Utility model content
The purpose of this utility model is to provide a kind of charge-discharge circuit for electric vehicle, which can be real
The integration of existing electric vehicle charging circuit and discharge circuit.
To achieve the goals above, the utility model provides a kind of charge-discharge circuit for electric vehicle, the charge and discharge
Circuit may include：Alignment unit, isolated location, rectification unit, detection unit and controller；
The alignment unit includes：First controllable switch, the second controllable switch, third controllable switch and the 4th controllable switch,
The first end of first power interface of the charge-discharge circuit is connected by the first end of the first controllable switch and isolated location, and first
The first end of power interface is connected by the second end of the second controllable switch and isolated location, and the second end of the first power interface is logical
The first end for crossing third controllable switch and isolated location connects, the second end of the first power interface by the 4th controllable switch with every
Second end connection from unit；
Detection unit is connect with controller, and second of the first end and second source interface for detecting the first power interface
First voltage between end is poor；
Rectification unit is connect with isolated location, and the alternating current for exporting isolated location is converted into DC current and leads to
Cross the second source interface output of charge-discharge circuit；
Controller is controllably opened with the first controllable switch K1, the second controllable switch K2, third controllable switch K3 and the 4th respectively
Close K4 control terminal connection, for according to first voltage difference come control the first controllable switch and the 4th controllable switch break-make or
Control the break-make of the second controllable switch and third controllable switch.
Optionally, the first controllable switch can be the first field-effect tube, and the second controllable switch can be the second field-effect tube,
Third controllable switch can be third field-effect tube, and the 4th controllable switch can be the 4th field-effect tube；
The drain electrode of first field-effect tube is connect with the first end of the first power interface, the source electrode and third of the first field-effect tube
The drain electrode of field-effect tube connects, and the source electrode of third field-effect tube is connect with the second end of the first power interface, the first field-effect tube
Source electrode and the drain electrode of third field-effect tube between node and isolated location first end connect, the drain electrode of the second field-effect tube
It is connect with the first end of the first power interface, the drain electrode connection of the source electrode of the second field-effect tube and the 4th field-effect tube, the 4th
The source electrode of effect pipe is connect with the second end of the first power interface, and controller 50 is imitated with the first field-effect tube M1, second respectively
Should pipe M2, third field-effect tube M3 and the 4th field-effect tube M4 grid connection.
Optionally, which may include first voltage sensor and the first current sensor, which passes
Sensor is used to detect the voltage difference between the first end of the first power interface and the second end of the first power interface, and the first electric current passes
Sensor is connected between the source electrode of third field-effect tube and the second end of the first power interface, and controller is passed with the first electric current respectively
Sensor, the connection of first voltage sensor, for being controlled according to the testing result of the first current sensor and first voltage sensor
The break-make of first field-effect tube, the second field-effect tube, third field-effect tube and the 4th field-effect tube.
Optionally, which may include transformer, and the first end of the isolated location is the first end of transformer, should
The second end of isolated location is the second end of transformer.
Optionally, rectification unit includes the 5th controllable switch, the 6th controllable switch, the first diode and the second diode,
The first end of 5th controllable switch and the third end of transformer connect, the second end of the 5th controllable switch and bearing for the second diode
Pole connects, and the second end of the 6th controllable switch is connect with the anode of the second diode, the first end and first of the 6th controllable switch
The anode connection of diode, the cathode of the first diode connect with the first end of the 5th controllable switch, and the of the 6th controllable switch
4th end of node and transformer between two ends and the anode of the second diode connects, and the cathode of the second diode and the 5th can
The node controlled between the second end of switch is connected with the first end of second source interface, the first end and first of the 6th controllable switch
Node between the anode of diode is connected with the second end of second source interface, controller respectively with the 5th controllable switch and institute
State the control terminal connection of the 6th controllable switch.
Optionally, the 5th controllable switch is the 5th field-effect tube, and the 6th controllable switch is the 6th field-effect tube, and the 5th is controllable
The first end of switch is the source electrode of the 5th field-effect tube, and the second end of the 5th controllable switch is the drain electrode of the 5th field-effect tube, the
The first end of six controllable switches is the source electrode of the 6th field-effect tube, and the second end of the 6th controllable switch is the leakage of the 6th field-effect tube
Pole, the control terminal of the 5th controllable switch are the grid of the 5th field-effect tube, and the control terminal of the 6th controllable switch is the 6th field-effect
The grid of pipe.
Optionally, detection unit further comprises second voltage sensor and the second current sensor, second voltage sensing
The second voltage that device is used to detect between the first end of second source interface and the second end of second source interface is poor；Second electric current
Sensor is connected between the drain electrode and the second end of second source interface of the 6th field-effect tube；Controller can be further used for
The 5th controllable switch and the 6th controllable switch are controlled according to the testing result of second voltage sensor and the second current sensor
Break-make.
Optionally, charge-discharge circuit may further include host computer, which connect with controller, for controlling control
Device processed is to switch the working condition of charge-discharge circuit.
Optionally, charge-discharge circuit further comprises：First inductor, the second inductor and the first capacitor, first
The drain electrode of effect pipe is connect by the first inductor with the first end of the first power interface, and the source electrode of third field-effect tube passes through
Two inductors are connect with the second end of the first power interface, and the drain electrode of the first field-effect tube is imitated by the first capacitor and third field
Should pipe source electrode connection.
Optionally, charge-discharge circuit further comprises：The first end of second capacitor, second source interface passes through the second electricity
Container is connect with the second end of second source interface.
Through the above technical solutions, the charge-discharge circuit provided by the utility model for electric vehicle can realize it is electronic
The integration of the charging circuit and discharge circuit of automobile has saved the design cost and production cost of circuit, has improved circuit
Working efficiency.
The other feature and advantage of the utility model embodiment will give in detail in subsequent specific embodiment part
Explanation.
Description of the drawings
Attached drawing is further understood to the utility model embodiment for providing, and one of constitution instruction
Point, for explaining the utility model embodiment together with following specific implementation mode, but do not constitute to the utility model
The limitation of embodiment.In the accompanying drawings：
Fig. 1 is the charge-discharge circuit for electric vehicle of an embodiment according to the present utility model；
Fig. 2 is the charge-discharge circuit for electric vehicle of an embodiment according to the present utility model.
Reference sign
10, alignment unit 20, isolated location
30, rectification unit 40, detection unit
50, controller K1, the first controllable switch
K2, the second controllable switch K3, third controllable switch
K4, the 4th controllable switch K5, the 5th controllable switch
K6, the 6th controllable switch M1, the first field-effect tube
M2, the second field-effect tube M3, third field-effect tube
M4, the 4th field-effect tube M5, the 5th field-effect tube
M6, the 6th field-effect tube D1, the first diode
D2, the second diode U1, first voltage sensor
U2, second voltage sensor I1, the first current sensor
I2, the second current sensor T, transformer
L1, the first inductor L2, the second inductor
C1, the first capacitor C2, the second capacitor
Specific implementation mode
The specific implementation mode of the utility model embodiment is described in detail below in conjunction with attached drawing.It should be understood that
It is specific embodiment described herein is merely to illustrate and explains the utility model embodiment, is not limited to this
Utility model embodiment.
Fig. 1 is the structural representation of the charge-discharge circuit for electric vehicle of an embodiment according to the present utility model
Figure.In Fig. 1, charge-discharge circuit includes：Alignment unit 10, isolated location 20, rectification unit 30, detection unit 40 and controller
50。
In Fig. 1, which may include：First controllable switch K1, the second controllable switch K2, third are controllably opened
Close K3 and the 4th controllable switch K4.The first end (interface 11 in such as Fig. 1) of first power interface of the charge-discharge circuit passes through
First controllable switch K1 is connect with the first end (interface 1 in such as Fig. 1) of isolated location 20, and the first end of the first power interface is logical
The second controllable switch K2 is crossed to connect with the second end (interface 2 in such as Fig. 1) of isolated location 20.The second end of first power interface
(interface 12 in such as Fig. 1) is connect by third controllable switch K3 with the first end of isolated location 20, and the of the first power interface
Two ends are connect by the 4th controllable switch K4 with the second end of isolated location 20.In this embodiment, first controllable switch
K1, the second controllable switch K2, third controllable switch K3, the 4th controllable switch K4 may each comprise but are not limited to field-effect tube, three
Pole pipe.In an example of the utility model, first controllable switch K1, the second controllable switch K2, third controllable switch K3,
4th controllable switch K4 may each comprise field-effect tube, correspondingly, first controllable switch K1, the second controllable switch K2, third
Controllable switch K3 and the 4th controllable switch K4 can be the first field-effect tube M1, the second field-effect tube M2, third field-effect tube M3
With the 4th field-effect tube M4.As shown in Fig. 2, the drain electrode of first field-effect tube M1 is connect with the first end of the first power interface,
The source electrode of first field-effect tube M1 is connect with the drain electrode of third field-effect tube M3, the source electrode and the first power supply of third field-effect tube M3
The second end of interface connects, and node between the source electrode and the drain electrode of third field-effect tube M3 of the first field-effect tube M1 and is isolated singly
The first end connection of member 20.The drain electrode of second field-effect tube M2 is connect with the first end of the first power interface, the second field-effect tube
The source electrode of M2 is connect with the drain electrode of the 4th field-effect tube M4, the second end of the source electrode and the first power interface of the 4th field-effect tube M4
Connection, the second end of node and isolated location 20 between the source electrode and the drain electrode of the 4th field-effect tube M4 of the second field-effect tube M2
Connection.In another example of the utility model, which may include transformer T, first field-effect tube M1
Source electrode and the drain electrode of third field-effect tube M3 between node and transformer T first end (port 1 as shown in Figure 2,
That is the first end of the first coil in transformer T) connection, the leakage of the source electrode and the 4th field-effect tube M4 of second field-effect tube M2
Node between pole and transformer T second end (port 2 as shown in Figure 2, i.e. the of first coil in transformer T
Two ends) connection.
In an example of the utility model, the controller 50 can be general processor, application specific processor, it is conventional at
Manage device, digital signal processor (DSP), multi-microprocessor, one or more microprocessors associated with DSP core, control
The collection of device processed, microcontroller, application-specific integrated circuit (ASIC), field programmable gate array (FPGA) circuit, any other type
At circuit (IC), state machine etc..
Detection unit 40 is connect with controller 50, the first end and the first power interface for detecting the first power interface
First voltage between second end is poor.The controller 50 is imitated with the first field-effect tube M1, the second field-effect tube M2, third field respectively
Should pipe M3 and the 4th field-effect tube M4 grid connection, can be used for judging first power interface according to the first voltage difference
Connection relation between first end and second end and external power supply (when forward direction works).In an example of the utility model,
If what the first end of first power interface connected is the anode of external power supply, the second end connection of first power interface
It is the cathode of external power supply.First voltage difference is the voltage difference between the first end and second end of the first power interface, at this point, the
One voltage difference is more than 0.If what the first end of first power interface connected is the cathode of external power supply, first power interface
Second end connection be external power supply anode.At this point, first voltage difference is less than 0.Accordingly, which can be according to this
First voltage difference whether more than 0 come control the first field-effect tube M1, the second field-effect tube M2, third field-effect tube M3 and the 4th
The break-make of effect pipe M4.In an example of the utility model, in the case where the first voltage difference is more than 0, controller 50
The first field-effect tube M1 and the 4th field-effect tube M4 conductings are controlled, the second field-effect tube M2 and third field-effect tube M3 is disconnected.
In the case that the first voltage difference is less than 0, controller 50 controls the second field-effect tube M2 and the M3 conductings of third field-effect tube, disconnects
First field-effect tube M1 and the 4th field-effect tube M4.Operating personnel can be avoided in this way because misoperation makes external power supply connect
Mouth damages problem with circuit caused by the first power interface Opposite direction connection.In this embodiment, which can be with
Including first voltage sensor U1, it is poor that first voltage sensor U1 can be used for detecting the first voltage.In the utility model
Another embodiment in, the detection unit 40 can also include the first current sensor, first current sensor I1 can
The size of current between first end and second end for detecting the first power interface and the first current signal of generation.Controller
50 connect with first current sensor I1, pre- for judging whether first current signal is more than according to first current signal
If the charge-discharge circuit the first maximum input current.Judging first current signal more than the first maximum input current
In the case of, at this point, illustrate that external power supply may be damaged circuit by the electric current that the first power interface inputs, then, controller
50 the first field-effect tube M1 of control, the second field-effect tube M2, third are disconnected from field-effect tube M3 and the 4th field-effect tube M4 to protect
Protect the charge-discharge circuit.In the case where judging that the first current signal is less than the first maximum input current, at this point, illustrating that this is external
Power supply belongs to the normal range of operation of the charge-discharge circuit by the electric current that the first power interface inputs, at this point, controller 50 is pressed
It works according to the work method control above-mentioned charge-discharge circuit.In another example of the utility model, in order to protect this to fill
Discharge circuit, and the first current sensor I1 is enable to detect electricity at the first time when the first power interface accesses power supply
Flow valuve, the charge-discharge circuit can also include the first inductor L1, the second inductor L2 and the first capacitor C1.First inductance
Device L1 is connected to node and the first power interface between the drain electrode of the first field-effect tube M1 and the drain electrode of the second field-effect tube M2
First end between, second inductor L2 be connected to third field-effect tube M3 source electrode and the 4th field-effect tube M4 source electrode it
Between node and the second end of the first power interface between.First capacitor C1 be connected to the first field-effect tube M1 drain electrode and
Between the node between node and third field-effect tube M3 and the 4th field-effect tube M4 between the drain electrode of second field-effect tube M2.
Rectification unit 30 is connect with isolated location 20, and the alternating current for exporting isolated location 20 is converted into direct current
It flows and is exported by the second source interface of charge-discharge circuit.In this embodiment, which may include the 5th
Controllable switch M5, the 6th controllable switch M6, the first diode D1 and the second diode D2.As shown in Figure 1, the 5th controllable switch K5
First end connect with the third end (port 3 as shown in Figure 1) of transformer T, the second end of the 5th controllable switch K5 and the
The cathode of two diode D2 connects, and the second end of the 6th controllable switch K6 is connect with the anode of the second diode D2, and the 6th is controllable
The anode of the first end of switch K6 and the first diode D1 are connect, and the of the cathode of the first diode D1 and the 5th controllable switch K5
One end connects, the node between the second end of the 6th controllable switch K6 and the anode of the second diode D2 and the 4th of transformer T
(port 4 as shown in the figures) connection is held, between the cathode and the second end of the 5th controllable switch K5 of the second diode D2
The first end (port 21 as shown in the figures) of node and second source interface connect, the first end of the 6th controllable switch K6 with
The second end (port 22 as shown in Figure 1) of node and second source interface between the anode of first diode D1 is even
It connects.In this embodiment, the 5th controllable switch K5, the 6th controllable switch K6 may each comprise but be not limited to field-effect tube,
Triode.In an embodiment of the utility model, the 5th controllable switch K5, the 6th controllable switch K6 all can be fields
Effect pipe, correspondingly, the 5th controllable switch K5 and the 6th controllable switch K6 can be the 5th field-effect tube M5 and the 6th effect
It should pipe M6.As shown in Fig. 2, the first end of the 5th controllable switch K5 can be the source electrode of the 5th field-effect tube M5, second end can
Think the drain electrode of the 5th field-effect tube M5.The first end of 6th controllable switch K6 can be the source electrode of the 6th field-effect tube M6, the
The second end of six controllable switch K6 can be the drain electrode of the 6th field-effect tube M6.Controller 50 can be generated for controlling the 5th
The first pwm signal and the second pwm signal of effect pipe M5 and the 6th field-effect tube M6, first pwm signal and the second pwm signal
Can be two pwm signals of opposite in phase.Also, in order to achieve the purpose that rectification, first pwm signal and the 2nd PWM letters
Number frequency can be determined according to the frequency of the external power supply (AC power) of the first power interface.
In an embodiment of the utility model, detection unit 40 may further include second voltage sensor U2
With the second current sensor I2, as shown in Fig. 2, second voltage sensor U2 is used to detect the first end and the of second source interface
Second voltage between the second end of two power interfaces is poor；Second current sensor I2 is connected to the drain electrode of the 6th field-effect tube M6
Between the second end of second source interface, the electric current between first end and second end for detecting the second source interface is big
Small and the second current signal of generation.Controller 50 is connect with the grid of the 5th field-effect tube M5 and the 6th field-effect tube M6 respectively,
Can be further used for according to second voltage difference whether be more than 0 judge the first end and second end of the second source interface with it is external
(when reversely operated, in this embodiment, external power supply when this is reversely operated can be the power electric of electric vehicle to power supply
Pond) connection.When the second voltage difference is more than 0, the first end of the second source interface and the anode of external power supply are even
It connects, the second end of the second source interface and the cathode of external power supply connect；At this point, controller 50 to the 5th field-effect tube M5 and
6th field-effect tube M6 inputs the first pwm signal and the second pwm signal so that the charge-discharge circuit is started to work.This second
In the case that voltage difference is less than 0, the first end of the second source interface and the cathode of external power supply connect, the second source interface
Second end connect with the anode of extraneous power supply, at this point, controller 50 can be by adjusting the first pwm signal and the 2nd PWM letters
Number the mode of phase realize first end output cathode voltage signal in the first power interface and in the first power interface
Second port output negative pole voltage signal.In an example of the utility model, the mode of the adjusting phase can be for example
First pwm signal and the second pwm signal are adjusted into 180 degree.The detection unit 40 by second voltage sensor U2 avoid because
It is slipped up for operating personnel so that the problem of circuit damages caused by power interface reversal connection.In fig. 2, the second current sensor I2
It is connected between the source electrode and the second end of second source interface of the 6th field-effect tube M6, for detecting the second source interface
Size of current between first end and second end and the second current signal of generation.Controller 50 judges according to second current signal
Whether second current signal is more than the second maximum input current of the charge-discharge circuit.Judging that second current signal is more than
In the case of the maximum input current of the second of the charge-discharge circuit, controls the 5th field-effect tube M5 and the 6th field-effect tube M6 is disconnected
To protect the charge-discharge circuit.
In an embodiment of the utility model, which can also include the second capacitor C2.Due to
The external power supply that the second source interface is connected in this embodiment is the power battery of electric vehicle, in order to avoid at this
The electric current that second source interface exports in the case of charge-discharge circuit forward direction work (the first power interface to second source interface)
There is AC influence signal in signal, and the second capacitor can be connected between the first end and second end of the second source interface
C2。
In this embodiment, which may further include host computer 60, the host computer 60 and controller
50 connections, for controlling the controller 50 to adjust forward and reverse working condition of the charge-discharge circuit.One in the present invention is shown
In example, when forward direction works, alternating current (220V exchanges) is accessed by the first power interface, and controller 50 is by identifying first voltage
Difference judges the connection of the first power interface and alternating current (external power supply), and alternating current input is being adjusted just by alignment unit 10
Cathode.The alternating current (is driven by controller 50 by pwm signal after the decompression of transformer T and isolation by rectification unit 30
It is dynamic) it is converted into DC current, after the second capacitor C2 filtering, the power battery of second source interface connection is filled
Electricity；When reversely operated, the power battery is by the input dc power of second source interface, and the direct current is by rectification unit 30
Rectification, and after the boosting of transformer T and isolation, be converted into the alternating current of 220V and exported by the first power interface.
In the course of work of the charge-discharge circuit, which can be to pwm signal (the first pwm signal, second of controller 50
Pwm signal) it is configured, such as the frequency of the pwm signal is mediated or the phase of pwm signal is adjusted.
Through the above technical solutions, the charge-discharge circuit provided by the utility model for electric vehicle can realize it is electronic
The integration of the charging circuit and discharge circuit of automobile has saved the design cost and production cost of circuit, has improved circuit
Working efficiency.
The optional embodiment of the utility model example is described in detail above in association with attached drawing, still, the utility model is implemented
Mode is not limited to the detail in the above embodiment, can in the range of the technology design of the utility model embodiment
To carry out a variety of simple variants to the technical solution of the utility model embodiment, these simple variants belong to the utility model
The protection domain of embodiment.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case of shield, it can be combined by any suitable means.In order to avoid unnecessary repetition, the utility model is implemented
Mode no longer separately illustrates various combinations of possible ways.
It will be appreciated by those skilled in the art that realizing that all or part of step in the above embodiment method is can to lead to
Cross program and completed to instruct relevant hardware, which is stored in a storage medium, including some instructions use so that
One (can be microcontroller, chip etc.) or processor (processor) execute each embodiment the method for the application
All or part of step.And storage medium above-mentioned includes：USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. are various can store journey
The medium of sequence code.
In addition, arbitrary combination can also be carried out between a variety of different embodiments of the utility model embodiment, only
It wants it without prejudice to the thought of the utility model embodiment, equally should be considered as interior disclosed in the utility model embodiment
Hold.
Claims (10)
1. a kind of charge-discharge circuit for electric vehicle, which is characterized in that the charge-discharge circuit includes：Alignment unit
(10), isolated location (20), rectification unit (30), detection unit (40) and controller (50)；
The alignment unit (10) includes：First controllable switch (K1), the second controllable switch (K2), third controllable switch (K3) and
The first end of 4th controllable switch (K4), the first power interface of the charge-discharge circuit passes through first controllable switch (K1)
It is connect with the first end of the isolated location (20), the first end of first power interface passes through second controllable switch
(K2) it is connect with the second end of the isolated location (20), the second end of first power interface is controllably opened by the third
It closes (K3) to connect with the first end of the isolated location (20), the second end of first power interface is controllable by the described 4th
Switch (K4) is connect with the second end of the isolated location (20)；
The detection unit (40) connect with the controller (50), the first end for detecting first power interface and institute
The first voltage stated between the second end of the first power interface is poor；
The rectification unit (30) connect with the isolated location (20), the alternating current for exporting the isolated location (20)
Circulation changes DC current into and is exported by the second source interface of the charge-discharge circuit；
The controller (50) is controllably opened with first controllable switch (K1), second controllable switch (K2), third respectively
It closes (K3) to connect with the control terminal of the 4th controllable switch (K4), for controlling described first according to the first voltage difference
The break-make of controllable switch (K1) and the 4th controllable switch (K4) or control second controllable switch (K2) and described the
The break-make of three controllable switches (K3).
2. charge-discharge circuit according to claim 1, which is characterized in that first controllable switch (K1) is first effect
It should manage (M1), second controllable switch (K2) is the second field-effect tube (M2), the third controllable switch (K3) is third field
Effect pipe (M3), the 4th controllable switch (K4) are the 4th field-effect tube (M4)；
The drain electrode of first field-effect tube (M1) is connect with the first end of first power interface, first field-effect tube
(M1) source electrode is connect with the drain electrode of the third field-effect tube (M3), the source electrode of the third field-effect tube (M3) and described the
The second end of one power interface connects, the drain electrode of the source electrode of first field-effect tube (M1) and the third field-effect tube (M3)
Between node connect with the first end of the isolated location (20), the drain electrode and described first of second field-effect tube (M2)
The first end of power interface connects, and the source electrode of second field-effect tube (M2) connects with the drain electrode of the 4th field-effect tube (M4)
It connects, the source electrode of the 4th field-effect tube (M4) is connect with the second end of first power interface, second field-effect tube
(M2) second end of node and the isolated location (20) between source electrode and the drain electrode of the 4th field-effect tube (M4) connects
Connect, the controller (50) respectively with first field-effect tube (M1), the second field-effect tube (M2), third field-effect tube (M3)
It is connected with the grid of the 4th field-effect tube (M4).
3. charge-discharge circuit according to claim 2, which is characterized in that the detection unit (40) includes that first voltage passes
Sensor (U1) and the first current sensor (I1), the first voltage sensor (U1) is for detecting first power interface
First voltage between first end and the second end of first power interface is poor, and first current sensor (I1) is connected to
Between the source electrode and the second end of first power interface of the third field-effect tube (M3), the controller (50) respectively with
First current sensor (I1), the first voltage sensor (U1) connection, for according to first current sensor
(I1) and the testing result of the first voltage sensor (U1) controls first field-effect tube (M1), the second field-effect tube
(M2), the break-make of third field-effect tube (M3) and the 4th field-effect tube (M4).
4. charge-discharge circuit according to claim 3, which is characterized in that the isolated location (20) includes transformer (T),
The first end of the isolated location (20) is the first end of the first coil of the transformer (T), the isolated location (20)
Second end is the second end of the first coil of the transformer (T).
5. charge-discharge circuit according to claim 4, which is characterized in that the rectification unit (30) is controllably opened including the 5th
(K5), the 6th controllable switch (K6), the first diode (D1) and the second diode (D2) are closed, the 5th controllable switch (K5)
First end is connect with the third end of the transformer (T), second end and the two or two pole of the 5th controllable switch (K5)
The cathode connection of (D2) is managed, the second end of the 6th controllable switch (K6) is connect with the anode of second diode (D2),
The first end of 6th controllable switch (K6) is connect with the anode of first diode (D1), first diode (D1)
Cathode connect with the first end of the 5th controllable switch (K5), the second end of the 6th controllable switch (K6) and described the
Node between the anode of two diodes (D2) is connect with the 4th end of the transformer (T), second diode (D2)
The first end of node and second source interface between cathode and the second end of the 5th controllable switch (K5) is connect, and described
Node between the first end of six controllable switches (K6) and the anode of first diode (D1) and the second source interface
Second end connection, the controller (50) respectively with the 5th controllable switch (K5) and the 6th controllable switch (K6)
Control terminal connects.
6. charge-discharge circuit according to claim 5, which is characterized in that the 5th controllable switch (K5) is the 5th effect
It should manage (M5), the 6th controllable switch is the 6th field-effect tube (M6), and the first end of the 5th controllable switch (K5) is the
The source electrode of five field-effect tube (M5), the second end of the 5th controllable switch (K5) are the leakage of the 5th field-effect tube (M5)
Pole, the first end of the 6th controllable switch (K6) are the source electrode of the 6th field-effect tube (M6), the 6th controllable switch (K6)
Second end be the 6th field-effect tube (M6) drain electrode, the control terminal of the 5th controllable switch (K5) is described 5th
The grid of effect pipe (M1), the control terminal of the 6th controllable switch (K6) are the grid of the 6th field-effect tube (M6).
7. charge-discharge circuit according to claim 6, which is characterized in that the detection unit (40) further comprises second
Voltage sensor (U2) and the second current sensor (I2), the second voltage sensor (U2) is for detecting the second source
Second voltage between the first end of interface and the second end of the second source interface is poor；Second current sensor (I2)
It is connected between the drain electrode and the second end of the second source interface of the 6th field-effect tube (M6)；
The controller (50) is further used for according to the second voltage sensor (U2) and second current sensor
(I2) testing result controls the break-make of the 5th controllable switch (M5) and the 6th controllable switch (M6).
8. charge-discharge circuit according to claim 7, which is characterized in that the charge-discharge circuit further comprises host computer
(60), the host computer (60) connect with the controller (50), for controlling the controller (50) to switch the charge and discharge
The working condition of circuit.
9. charge-discharge circuit according to claim 8, which is characterized in that the charge-discharge circuit further comprises：First
Inductor (L1), the second inductor (L2) and the first capacitor (C1), the drain electrode of first field-effect tube (M1) is described in
First inductor (L1) is connect with the first end of first power interface, and the source electrode of the third field-effect tube (M3) passes through institute
It states the second inductor (L2) to connect with the second end of first power interface, the drain electrode of first field-effect tube (M1) passes through
First capacitor (C1) connect with the source electrode of the third field-effect tube (M3).
10. charge-discharge circuit according to claim 9, which is characterized in that the charge-discharge circuit further comprises：Second
The first end of capacitor (C2), the second source interface passes through second capacitor (C2) and the second source interface
Second end connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820047696.7U CN207719857U (en) | 2018-01-11 | 2018-01-11 | Charge-discharge circuit for electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820047696.7U CN207719857U (en) | 2018-01-11 | 2018-01-11 | Charge-discharge circuit for electric vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207719857U true CN207719857U (en) | 2018-08-10 |
Family
ID=63051544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820047696.7U Active CN207719857U (en) | 2018-01-11 | 2018-01-11 | Charge-discharge circuit for electric vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207719857U (en) |
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2018
- 2018-01-11 CN CN201820047696.7U patent/CN207719857U/en active Active
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