CN206615079U - A kind of drive system of electric automobile DC/DC change-over circuits - Google Patents
A kind of drive system of electric automobile DC/DC change-over circuits Download PDFInfo
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- CN206615079U CN206615079U CN201720114092.5U CN201720114092U CN206615079U CN 206615079 U CN206615079 U CN 206615079U CN 201720114092 U CN201720114092 U CN 201720114092U CN 206615079 U CN206615079 U CN 206615079U
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- change
- over circuits
- drive circuit
- electric automobile
- voltage
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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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- 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
- Y02T10/72—Electric energy management in electromobility
Abstract
The utility model provides a kind of drive system of electric automobile DC/DC change-over circuits, it is connected to by isolated drive circuit between entire car controller and DC/DC change-over circuits, and DC/DC change-over circuits input cathode and electric automobile low-voltage electric system altogether, DC/DC change-over circuits output earth terminal and electric automobile electrokinetic cell altogether；Entire car controller is connected by isolated drive circuit with the control end of DC/DC change-over circuits, is realized the high_voltage isolation driving between entire car controller and DC/DC change-over circuits, is improved stability and security that entire car controller is run with high-voltage electric system.
Description
Technical field
The utility model is related to electric vehicle engineering field, more particularly to a kind of drive of electric automobile DC/DC change-over circuits
Dynamic system.
Background technology
Currently, in the application field of electric automobile, the input of DC/DC change-over circuits and the electrokinetic cell of electric automobile
It is connected, the high-voltage dc voltage (48V-700VDC) of electrokinetic cell is converted into low voltage output；It is flat for 12V low-voltage electricals
Platform, it, which is exported, is generally 12-15V；For 24V low-voltage electrical platforms, it, which is exported, is generally 24-30V.
Prior art uses the output voltage of vehicle control unit controls DC/DC change-over circuits, realizes for low-voltage electrical system
The control of system.
But it is due to that the entire car controller is needed while the control for its high-voltage electric system is realized, so above-mentioned existing
The scheme of technology, not only easily influences the safe operation of the entire car controller, or even influence whether high-voltage electric system operation
Stability and security.
Utility model content
In view of this, the utility model provides a kind of drive system of electric automobile DC/DC change-over circuits, existing to solve
The problem of having the stability and low security that entire car controller is run with high-voltage electric system in technology.
To achieve the above object, the technical scheme that the application is provided is as follows：
A kind of drive system of electric automobile DC/DC change-over circuits, applied to defeated to DC/DC change-over circuits in electric automobile
Go out the control of voltage；The input of the DC/DC change-over circuits is connected with the electrokinetic cell of the electric automobile, the DC/DC
The output end of change-over circuit is connected with the battery and low-voltage electric system of the electric automobile；The electric automobile DC/DC turns
Changing the drive system of circuit includes：The entire car controller of isolated drive circuit and the electric automobile；Wherein：
The entire car controller is connected with the input anode of the isolated drive circuit；
The input cathode of the isolated drive circuit and the low-voltage electric system are altogether；
The out-put supply end of the isolated drive circuit is connected with high pressure adjustment power supply；
The output earth terminal and the electrokinetic cell of the isolated drive circuit are altogether；
The output end of the isolated drive circuit is connected with the control end of the DC/DC change-over circuits.
It is preferred that, the isolated drive circuit includes：High pressure optocoupler, first resistor and second resistance；Wherein：
One end of the first resistor is the input anode of the isolated drive circuit；
The other end of the first resistor is connected with the anode of the high pressure optocoupler；
The negative electrode of the high pressure optocoupler is the input cathode of the isolated drive circuit；
The out-put supply end of the extremely described isolated drive circuit of current collection of the high pressure optocoupler；
The emitter stage of the high pressure optocoupler is connected with one end of the second resistance, and tie point is the isolated drive circuit
Output end；
The other end of the second resistance is the output earth terminal of the isolated drive circuit.
It is preferred that, in addition to：The current sensor and voltage sensor being connected with the entire car controller；
The voltage sensor is connected between the output end of the DC/DC change-over circuits；
The current sensor be connected to the output head anodes of the DC/DC change-over circuits and the battery positive voltage it
Between.
From such scheme, the drive system for the electric automobile DC/DC change-over circuits that the utility model is provided, by every
It is connected to from drive circuit between entire car controller and DC/DC change-over circuits, and the input cathode and electricity of DC/DC change-over circuits
Altogether, the output earth terminal of DC/DC change-over circuits and the electrokinetic cell of electric automobile are altogether for the low-voltage electric system of electrical automobile；It is whole
Vehicle controller is connected by isolated drive circuit with the control end of DC/DC change-over circuits, is realized entire car controller and is turned with DC/DC
The high_voltage isolation driving changed between circuit, improves stability and security that entire car controller is run with high-voltage electric system.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the accompanying drawing used required in description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the present utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
The structural representation of the drive system for the electric automobile DC/DC change-over circuits that Fig. 1 provides for the utility model embodiment
Figure；
The circuit diagram for the isolated drive circuit that Fig. 2 provides for the utility model embodiment；
Another structure of the drive system for the electric automobile DC/DC change-over circuits that Fig. 3 provides for the utility model embodiment
Schematic diagram.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belongs to the scope of the utility model protection.
The utility model provides a kind of drive system of electric automobile DC/DC change-over circuits, to solve in the prior art
The problem of stability and low security that entire car controller is run with high-voltage electric system.
Specifically, referring to Fig. 1, the drive system of electric automobile DC/DC change-over circuits, applied to in electric automobile
The control of the output voltage of DC/DC change-over circuits 101；
As shown in figure 1, the input of DC/DC change-over circuits 101 is connected with the electrokinetic cell 102 of electric automobile, DC/DC turns
The output end of circuit 101 is changed with the battery 103 of electric automobile and low-voltage electric system 104 to be connected.
The drive system of electric automobile DC/DC change-over circuits includes：The vehicle control of isolated drive circuit 105 and electric automobile
Device 106 processed；Wherein：
Entire car controller 106 is connected with the input anode of isolated drive circuit 105；
The input cathode and low-voltage electric system 104 of isolated drive circuit 105 are altogether；
The out-put supply end of isolated drive circuit 105 is connected with high pressure adjustment power supply；
The output earth terminal and electrokinetic cell 102 of isolated drive circuit 105 are altogether；
The output end of isolated drive circuit 105 is connected with the control end of DC/DC change-over circuits 101.
Specifically operation principle is：
Electrokinetic cell 102 is as energy storage device there is provided system capacity and high voltage, and voltage range is generally 48V-700V.
DC/DC change-over circuits 101 are changed by power electronics, by the high voltage of electrokinetic cell be converted into low-voltage there is provided
Low pressure is with supplying electricity to low-voltage electric system 104.
Battery 103 and DC/DC change-over circuits 101 are in parallel；It is low tension by battery 103 when electric automobile starts
Gas system 104 provides power supply；When electric automobile is run, battery 103 and DC/DC change-over circuits 101 1 are all low-voltage electrical
Low pressure components in system 104 provide low-tension supply；In addition, the voltage of battery 103 will receive when less than certain numerical value
The charging of DC/DC change-over circuits 101.
Low pressure components are the consuming parts of low-voltage electric system 104, and consumption DC/DC change-over circuits 101 and battery 103 are carried
The electric energy of confession.
Entire car controller 106 drives DC/DC change-over circuits 101 according to vehicle operating condition by isolated drive circuit 105
Operation, the output voltage of control DC/DC change-over circuits 101；And according to loading demand output current, to meet low-voltage electrical system
The power demand of system 104.
The drive system for the electric automobile DC/DC change-over circuits that the present embodiment is provided, is connected by isolated drive circuit 105
Between entire car controller 106 and DC/DC change-over circuits 101, and the input cathode and electronic vapour of DC/DC change-over circuits 101
Altogether, the output earth terminal of DC/DC change-over circuits 101 and the electrokinetic cell 102 of electric automobile are total to the low-voltage electric system 104 of car
Ground；Entire car controller 106 is connected by isolated drive circuit 105 with the control end of DC/DC change-over circuits 101, realizes vehicle
High_voltage isolation driving between controller 106 and DC/DC change-over circuits 101, improves entire car controller 106 and high-voltage electrical apparatus system
The stability and security of system operation.
Another embodiment of the utility model provides a kind of drive system of specific electric automobile DC/DC change-over circuits,
Referring to Fig. 1, the drive system of electric automobile DC/DC change-over circuits, including：Isolated drive circuit 105 and electric automobile it is whole
Vehicle controller 106；Wherein：
Entire car controller 106 is connected with the input anode of isolated drive circuit 105；
The input cathode and low-voltage electric system 104 of isolated drive circuit 105 are altogether；
The out-put supply end of isolated drive circuit 105 is connected with high pressure adjustment power supply；
The output earth terminal and electrokinetic cell 102 of isolated drive circuit 105 are altogether；
The output end of isolated drive circuit 105 is connected with the control end of DC/DC change-over circuits 101.
It is preferred that, isolated drive circuit 105 includes：High pressure optocoupler U1, first resistor R1 and second resistance R2；Wherein：
First resistor R1 one end is the input anode of isolated drive circuit 105；
The first resistor R1 other end is connected with high pressure optocoupler U1 anode；
High pressure optocoupler U1 negative electrode is the input cathode of isolated drive circuit 105；
The out-put supply end of high pressure optocoupler U1 current collection extremely isolated drive circuit 105；
High pressure optocoupler U1 emitter stage is connected with second resistance R2 one end, and tie point is defeated for isolated drive circuit 105
Go out end；
The second resistance R2 other end is the output earth terminal of isolated drive circuit 105.
Using high pressure optocoupler U1, the isolation of input and output signal can be realized, the stability of control is improved and resists dry
Disturb ability.High pressure optocoupler U1 anode, i.e. its input, receive the Regulate signal VCU_PWM of entire car controller 106, the regulation
The PWM waveform frequency of signal is fixed, and dutycycle can adjust.
First resistor R1 is input current-limiting resistance, adjusts high pressure optocoupler U1 input currents.
High pressure optocoupler U1 negative electrode and low-voltage electric system 104 GND altogether；
The voltage adjustment control signal of high pressure optocoupler U1 emitter stage, i.e. its output end output DC/DC change-over circuits 101
DCDC_TRIM, is connected on second resistance R2 front ends.
HV_TRIM signals are the output signals that high pressure adjusts power supply, and voltage range is in 0-5V, and the signal ground is with connecing high pressure.
Second resistance R2 is output current limiting resistance, regulation high pressure optocoupler U1 output current.
The second resistance R2 other end and electrokinetic cell 102 HV_GND altogether.
In the present embodiment, entire car controller 106 passes through controlling party of the isolated drive circuit 105 to DC/DC change-over circuits 101
Method is：
The generation of entire car controller 106 frequency is fixed, the adjustable Regulate signal VCU_PWM of dutycycle, is sent to isolation drive
Circuit 105, makes isolated drive circuit 105 produce and output voltage adjustment control signal DCDC_TRIM, control DC/DC conversion electricity
The voltage output on road 101.
Entire car controller 106 is turned by controlling to adjust the dutycycle size of PWM waveform in signal VCU_PWM, regulation DC/DC
Change the voltage adjustment control signal DCDC_TRIM of circuit 101 size；Specifically, PWM waveform duty cycle range is in 0-100%,
The voltage adjustment control signal DCDC_TRIM of correspondence DC/DC change-over circuits 101 scope 0-5V；PWM waveform dutycycle is bigger,
The voltage adjustment control signal DCDC_TRIM of DC/DC change-over circuits 101 is bigger, then the voltage output value of DC/DC change-over circuits 101
It is bigger.
In specific practical application, isolated drive circuit 105 is not necessarily limited to the form shown in Fig. 2, can be with
Depending on concrete application environment, in the protection domain of the application.
Another embodiment of the utility model provides a kind of drive system of specific electric automobile DC/DC change-over circuits,
On above-described embodiment and Fig. 1 and Fig. 2 basis, referring to Fig. 3, the drive system of electric automobile DC/DC change-over circuits is gone back
Including：The current sensor A and voltage sensor V being connected with entire car controller 106；
Voltage sensor V is connected between the output end of DC/DC change-over circuits 101；
Current sensor A is connected between the output head anode of DC/DC change-over circuits 101 and the positive pole of battery 103.
Voltage sensor V gathers the magnitude of voltage of the two ends of battery 103 and the output end of DC/DC change-over circuits 101, specifically：
Entire car controller 106 according to voltage sensor V gather battery 103 magnitude of voltage, calculating accumulator 103 it is charged
State.
It is preferential to be supplied to low pressure components using the power supply of battery 103 if the carrying capacity of battery 103 is high；Full-vehicle control
Control DC/DC 101 output voltages of change-over circuit of device 106 are relatively low, reduce the power output of DC/DC change-over circuits 101.
If battery carrying capacity is medium, DC/DC change-over circuits 101 are in parallel with battery 103, while being supplied for low pressure components
Electricity, control DC/DC 101 output voltages of change-over circuit of entire car controller 106 are medium, it is ensured that the power output of DC/DC change-over circuits 101
Power demands are met with the power output of battery 103.
If the carrying capacity of battery 103 is relatively low, DC/DC change-over circuits 101 meet the charge requirement of battery 103 and low simultaneously
The need for electricity of splenium part, the control output voltage of entire car controller 106 is higher, it is ensured that at the power output of DC/DC change-over circuits 101
It is interval in Effec-tive Function.
Entire car controller 106 detects the magnitude of voltage of the output end of DC/DC change-over circuits 101 according to voltage sensor V, can determine whether
Whether output voltage is optimum value that entire car controller 106 is calculated, then by closed-loop control, improves DC/DC change-over circuits 101
The control accuracy of output voltage, and ensure that DC/DC change-over circuits 101 are in optimal operating efficiency area, lift power
The capacity usage ratio of battery 102, saves electrokinetic cell energy, lifts the course continuation mileage of electric automobile.
The output current of current sensor A collection DC/DC change-over circuits 101, feeds back to entire car controller 106, it is ensured that DC/
The output current of DC change-over circuits 101 prevents excessively stream within setting output current secure threshold.
If there is the phenomenon of output overcurrent, in entire car controller 106 by reducing the dutycycle of PWM waveform, DC/DC is controlled
The output voltage of change-over circuit 101 reduces, and reduces output current.
Other specific operation principles are same as the previously described embodiments, no longer repeat one by one herein.
The embodiment of each in this specification is described by the way of progressive, what each embodiment was stressed be with it is other
Between the difference of embodiment, each embodiment same or similar part mutually referring to.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or new using this practicality
Type.A variety of modifications to these embodiments will be apparent for those skilled in the art, determine herein
The General Principle of justice can in other embodiments be realized in the case where not departing from spirit or scope of the present utility model.Cause
This, the utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The most wide scope consistent with features of novelty.
Claims (3)
1. a kind of drive system of electric automobile DC/DC change-over circuits, it is characterised in that applied to DC/DC in electric automobile
The control of change-over circuit output voltage；The input of the DC/DC change-over circuits is connected with the electrokinetic cell of the electric automobile,
The output end of the DC/DC change-over circuits is connected with the battery and low-voltage electric system of the electric automobile；The electronic vapour
The drive system of car DC/DC change-over circuits includes：The entire car controller of isolated drive circuit and the electric automobile；Wherein：
The entire car controller is connected with the input anode of the isolated drive circuit；
The input cathode of the isolated drive circuit and the low-voltage electric system are altogether；
The out-put supply end of the isolated drive circuit is connected with high pressure adjustment power supply；
The output earth terminal and the electrokinetic cell of the isolated drive circuit are altogether；
The output end of the isolated drive circuit is connected with the control end of the DC/DC change-over circuits.
2. the drive system of electric automobile DC/DC change-over circuits according to claim 1, it is characterised in that the isolation
Drive circuit includes：High pressure optocoupler, first resistor and second resistance；Wherein：
One end of the first resistor is the input anode of the isolated drive circuit；
The other end of the first resistor is connected with the anode of the high pressure optocoupler；
The negative electrode of the high pressure optocoupler is the input cathode of the isolated drive circuit；
The out-put supply end of the extremely described isolated drive circuit of current collection of the high pressure optocoupler；
The emitter stage of the high pressure optocoupler is connected with one end of the second resistance, and tie point is defeated for the isolated drive circuit
Go out end；
The other end of the second resistance is the output earth terminal of the isolated drive circuit.
3. the drive system of electric automobile DC/DC change-over circuits according to claim 1 or 2, it is characterised in that also wrap
Include：The current sensor and voltage sensor being connected with the entire car controller；
The voltage sensor is connected between the output end of the DC/DC change-over circuits；
The current sensor is connected between the output head anode of the DC/DC change-over circuits and the battery positive voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720114092.5U CN206615079U (en) | 2017-02-06 | 2017-02-06 | A kind of drive system of electric automobile DC/DC change-over circuits |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720114092.5U CN206615079U (en) | 2017-02-06 | 2017-02-06 | A kind of drive system of electric automobile DC/DC change-over circuits |
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| CN206615079U true CN206615079U (en) | 2017-11-07 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109159668A (en) * | 2018-10-10 | 2019-01-08 | 山东元齐新动力科技有限公司 | For the DC voltage converting system and its control method of electric car, medium |
| CN110504723A (en) * | 2019-08-08 | 2019-11-26 | 华为技术有限公司 | Charge power method of adjustment and device |
| CN111416443A (en) * | 2019-01-07 | 2020-07-14 | 哈尔滨工业大学（威海） | Device capable of realizing wireless power transmission voltage stabilization output |
| CN112243556A (en) * | 2018-06-11 | 2021-01-19 | 沃尔沃卡车集团 | DC/DC converter overload management in vehicle electrical systems |
| CN112706614A (en) * | 2020-12-21 | 2021-04-27 | 北京百度网讯科技有限公司 | Power supply control apparatus for vehicle and vehicle |
| CN112977295A (en) * | 2021-03-11 | 2021-06-18 | 奇瑞新能源汽车股份有限公司 | Electric vehicle, storage battery control method and device thereof and vehicle control unit |
| CN113968136A (en) * | 2021-10-29 | 2022-01-25 | 华人运通(江苏)技术有限公司 | Low-voltage energy control method, system, equipment and medium for electric automobile |
| CN114475489A (en) * | 2021-12-27 | 2022-05-13 | 奇瑞汽车股份有限公司 | Power supply system of automobile, automobile and control method of power supply system of automobile |
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- 2017-02-06 CN CN201720114092.5U patent/CN206615079U/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112243556A (en) * | 2018-06-11 | 2021-01-19 | 沃尔沃卡车集团 | DC/DC converter overload management in vehicle electrical systems |
| CN109159668A (en) * | 2018-10-10 | 2019-01-08 | 山东元齐新动力科技有限公司 | For the DC voltage converting system and its control method of electric car, medium |
| CN111416443A (en) * | 2019-01-07 | 2020-07-14 | 哈尔滨工业大学（威海） | Device capable of realizing wireless power transmission voltage stabilization output |
| CN110504723A (en) * | 2019-08-08 | 2019-11-26 | 华为技术有限公司 | Charge power method of adjustment and device |
| CN112706614A (en) * | 2020-12-21 | 2021-04-27 | 北京百度网讯科技有限公司 | Power supply control apparatus for vehicle and vehicle |
| CN112706614B (en) * | 2020-12-21 | 2022-12-23 | 阿波罗智联(北京)科技有限公司 | Power supply control apparatus for vehicle and vehicle |
| CN112977295A (en) * | 2021-03-11 | 2021-06-18 | 奇瑞新能源汽车股份有限公司 | Electric vehicle, storage battery control method and device thereof and vehicle control unit |
| CN112977295B (en) * | 2021-03-11 | 2022-05-31 | 奇瑞新能源汽车股份有限公司 | Electric vehicle, storage battery control method and device thereof and vehicle control unit |
| CN113968136A (en) * | 2021-10-29 | 2022-01-25 | 华人运通(江苏)技术有限公司 | Low-voltage energy control method, system, equipment and medium for electric automobile |
| CN113968136B (en) * | 2021-10-29 | 2023-11-10 | 华人运通(江苏)技术有限公司 | Low-voltage energy control method, system, equipment and medium for electric automobile |
| CN114475489A (en) * | 2021-12-27 | 2022-05-13 | 奇瑞汽车股份有限公司 | Power supply system of automobile, automobile and control method of power supply system of automobile |
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