CN206031104U - Charging circuit in advance with automatic control function - Google Patents
Charging circuit in advance with automatic control function Download PDFInfo
- Publication number
- CN206031104U CN206031104U CN201620955841.2U CN201620955841U CN206031104U CN 206031104 U CN206031104 U CN 206031104U CN 201620955841 U CN201620955841 U CN 201620955841U CN 206031104 U CN206031104 U CN 206031104U
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- CN
- China
- Prior art keywords
- circuit
- automatic control
- controller
- control function
- igct
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model provides a charging circuit in advance with automatic control function, include the parallel circuit who comprises feedback diode, thyristor main switch, NTC thermistor, and the sense resistor that establishes ties with it, sense resistor's both ends respectively have an end of drawing, it goes into to being used for control to draw forth the termination the automatic control circuit of thyristor main switch, automatic control circuit's signal output part connect in the signal input part of thyristor main switch. The beneficial effects of the utility model mainly reside in that: realize thyristor automatic control switch, be fit for installing in the controller, need not software and control, avoid because software problem or return circuit trouble are damaged, realize the charging effect in advance of controller, avoid producing the impact to group battery and controller inner looping, the combination in the automatic control circuit in completion conduct light current return circuit and the motor controller return circuit in conduct forceful electric power return circuit, for the feedback energy provides the passageway, further exert the energy -conserving advantage of electric automobile.
Description
Technical field
This utility model is related at a high speed（High pressure）Motor in electric automobile Drive technology field, specifically, more particularly to
A kind of pre-charge circuit of motor driver.
Background technology
At a high speed（High pressure）Generally in more than direct current 400V, the master controller of motor typically directly connects batteries of electric automobile voltage
On this dc bus.And as controller absorbs the needs of inversion drive end ripple current, generally need in driver
Place the electric capacity of hundreds of microfarad or even thousand of microfarads.Therefore, when controller access is galvanic in a flash, unidirectional current can be to electric capacity
Directly charge, due to the equivalent series resistance of electric capacity（ESR）Usually tens milliohm ranks, can produce kilo-ampere under high pressure
The instantaneous charge current of training, this is respectively provided with certain destroying infection for loops such as set of cells and electric capacity.
At present, industry is affected to eliminate above-mentioned high surge currents, commonly using the devices such as D.C. contactor come
Be controlled, and D.C. contactor then due to volume is big and expensive generally can not being placed on inside controller and must be outer
Put, go out to be controlled by controller lead, be a price, take up space, control loaded down with trivial details scheme.
The content of the invention
The purpose of this utility model is to overcome the shortcomings of that prior art is present, there is provided a kind of with the pre- of automatic control function
Charging circuit, prevents temporary impact electric current.
The purpose of this utility model is achieved through the following technical solutions：
A kind of pre-charge circuit with automatic control function, is connected between the set of cells of electric automobile and controller,
The controller is used for controlling the motor of electric automobile, and the controller at least includes main capacitance and the inversion for strobing
Drive circuit, the pre-charge circuit include the parallel connection electricity being made up of feedback diode, IGCT master switch, NTC thermistor
Road, and inductive reactance connected in series, the two ends of the inductive reactance respectively have an exit, and the exit is accessed to
One is used for controlling the automatic control circuit of the IGCT master switch, and the signal output part of the automatic control circuit is connected to institute
State the signal input part of IGCT master switch.
Preferably, the automatic control circuit includes instrument amplifier circuit, and two of the instrument amplifier circuit are defeated
Enter two exits that end is respectively the inductive reactance, the instrument amplifier circuit is connected to the negative foot of a comparator, institute
The positive foot for stating comparator is connected to pcb board load transformator in controller, and the output pin of the comparator is connected to a photoelectric coupling
Device, is connected with transistor in the negative side loop of the photoelectrical coupler, the second of the transistor reception pcb board load transformator is electric
Pressure, and there is signal output part, the signal output part is connected to the signal input part of the IGCT master switch.
Preferably, the first voltage value that the pcb board carries the positive foot that transformator is connected to the comparator is stable
15V。
Preferably, the pcb board carries transformer output voltage through electric resistance partial pressure, used as stable reference voltage.
Preferably, the second voltage value that the pcb board load transformator is connected to the transistor is 5V.
Pre-charge circuit with automatic control function of the present utility model, is applied to motor in electric automobile driver.
The beneficial effects of the utility model are mainly reflected in：1st, IGCT is cheap, and size is less, is adapted in controller
Interior installation, and be adapted to work under high-voltage large current environment；2nd, IGCT automatic control switch is realized, is carried out without the need for software
Control, it is to avoid because software issue or loop fault are damaged；3rd, the precharge effect of controller is realized in perfection, it is to avoid to set of cells
And controller inner looping produces impact；4th, complete automatic control circuit as weak electrical loop with as the electronic of forceful electric power loop
The perfect adaptation in machine controller loop；5th, passage is provided for feeding back energy, further play the advantage of electric automobile energy saving.
Description of the drawings
Below in conjunction with the accompanying drawings technical solutions of the utility model are described further：
Fig. 1：This utility model pre-charge circuit is applied to the schematic diagram of electric vehicle controller；
Fig. 2：The automatically controlled circuit diagram of the IGCT master switch of pre-charge circuit in Fig. 1.
Specific embodiment
This utility model is described in detail below with reference to specific embodiment shown in the drawings.But these embodiment party
Formula is not limited to this utility model, structure that one of ordinary skill in the art is made according to these embodiments, method or
Conversion functionally is all contained in protection domain of the present utility model.
This utility model discloses a kind of method for buffering charge circuit as high-voltage electric vehicle controller by the use of IGCT,
Which realizes charging buffering, automatically controls IGCT and opens and three functions of energy back.
As shown in Figure 1 and Figure 2, the pre-charge circuit with automatic control function, is connected to 1 He of set of cells of electric automobile
Between controller, the controller is used for controlling the motor 8 of electric automobile, and the controller at least includes what is strobed
Main capacitance 6 and inverse changing driving circuit 7, the pre-charge circuit are included by feedback diode 2, IGCT master switch 3, NTC temperature-sensitives
The parallel circuit of the composition of resistance 4, and inductive reactance 5 connected in series, the two ends of the inductive reactance 5 are respectively drawn with one
End, described exit DC+, I+ access to one for controlling the automatic control circuit of the IGCT master switch 3, described automatic
The signal output part G of control circuit is connected to the signal input part of the IGCT master switch 3.Preferably, it is described to automatically control
Circuit includes instrument amplifier circuit, and two inputs of the instrument amplifier circuit are respectively the two of the inductive reactance 5
Individual exit DC+, I+, the instrument amplifier circuit are connected to the negative foot of a comparator A3-A, and the comparator A3-A is just
Foot is connected to pcb board in controller by divider resistance and carries transformator, and the output pin of the comparator A3-A is connected to a photoelectricity
Bonder U5, is connected with transistor Q5 in the negative side loop of the photoelectrical coupler U5, the transistor Q5 receives pcb board and carries and becomes
The second voltage of depressor, and there is signal output part G, the signal output part G to be connected to the signal of the IGCT master switch 3
Input.
Preferably, the first voltage value that the pcb board carries the positive foot that transformator is connected to the comparator A3-A is stable
15V.The pcb board carries transformer output voltage through resistance R54, R55 partial pressure, used as stable reference voltage.The PCB
It is 5V that onboard transformator is connected to the second voltage value of the transistor Q5.
Design principle of the present utility model is described below.
NTC thermistor 4 is directly connected to set of cells 1 and main capacitance 6, and more than institute during electricity, electric current is warm by NTC first
Quick resistance 4 charges to main capacitance 6.The reason for using NTC thermistor 4 is；The initial resistance of NTC thermistor is about tens
Ohm, so about tens amperes of initial charge current impact, is overall safety.Continue with charging, NTC thermistor is received
Hot its resistance diminishes, it is allowed to which electric current becomes big, but while both sides voltage difference also reduces, charging current diminishes, and total charging current is in
Slow downward trend.It is and if adopting fixed resistance value resistance, first the moment of resistance resistance to joule value needs very greatly, expensive,
Second affected due to being reduced this single factor by voltage difference drop-out current, the charging interval is longer.So, it is hot using NTC
Quick resistance ratio greatly reduces the charging interval using fixed resistance value resistance and cost is more cheap.
For IGCT master switch, open needs and meet following 2 conditions：
a：IGCT bears forward voltage；
b：The electric current for flowing through IGCT must is fulfilled for certain maintenance electric current, normally about more than 100 milliamperes.
So, initial stage electric current charges to main capacitance 6 only by NTC thermistor 4, and IGCT master switch 3 is not turned on.
After the precharge of main capacitance 6 terminates, inverse changing driving circuit 7 starts, it is desirable to have larger current flows through preliminary filling electrical circuit；
Now, there is voltage drop between exit DC+, the I+ at the two ends of inductive reactance 5, the voltage drop is become with curent change
It is dynamic.
It is concrete as shown in Fig. 2 carrying transformator by pcb board first produces two groups of independent voltages, respectively+15V/+5V, this
2 voltages are produced relative to DC+, so its value remains stable.First voltage+15V is produced through resistance R54, R55 partial pressure
The positive foot of a raw stable reference voltage input comparator A3-A is used as reference.
2 groups of signals of both sides extraction of the inductive reactance 5, respectively exit DC+ and I+, due to there is electric current to flow through,
The both sides of the inductive reactance 5 can produce a voltage drop V.Relative to DC+, its voltage drop V is changed with curent change
's.This voltage drop V produces the negative foot of a comparison voltage input comparator A3 after instrument amplifier circuit process.
Due to the resistance of the inductive reactance 5 it is less（Generally within 10 milliohms）, so the voltage drop for producing thereon also compared with
It is little, so three amplifiers U21-A, U21-C, U21-D of the present utility model constitute an instrumentation amplifier circuit, can be to micro-
Little voltage signal is amplified.Detection signal can be designed in 10A or so trigger circuits.
In this utility model, when exit I+ is less than DC+ certain numerical values, comparator upset, so that produce one
Low level, turns on photoelectrical coupler U5.After photoelectrical coupler U5 conductings, electric current is produced between its 3,4 foot of negative side, make transistor
Q5 is turned on, and second voltage+5V passes through transistor Q5 so as to export the Continuity signal G of an IGCT master switch 3, so as to open crystalline substance
Brake tube master switch 3.
In this utility model, IGCT master switch 3 can be installed in inside controller, and A poles are connected on battery voltage,
K can extremely connect, and G poles connect on circuit boards, and trigger connection described above
Together.Feedback diode and charging resistor NTC are all welded on circuit boards, collectively constitute a preliminary filling electrical circuit.Faradism
Resistance is usually the 5W of 5 ~ 10 milliohms or so resistance, when electric current is larger, can select 2 or more parallel connections.Main capacitance 6 can be selected
Alminium electrolytic condenser or thin-film capacitor is selected, inverse switch device mostly is IGBT module.
Briefly, pre-charge method of the present utility model, comprises the steps：
First, set of cells is powered, and enters line precharge by 4 pairs of main capacitances 6 of NTC thermistor；
Continue with charging, NTC thermistor 4 is heated causes its resistance to diminish, then pass through under conditions of voltage stabilization
Its electric current becomes big, but while its both sides voltage difference also reduces, charging current diminishes, and total charging current is in slow downward trend；
Secondly, after the precharge of main capacitance 6 terminates, inverse changing driving circuit 7 starts；Now, the two ends of inductive reactance 5 are drawn
Go out to hold, the voltage drop is changed with curent change；
When the voltage drop is higher than predetermined value, comparator A3-A upsets turn on photoelectrical coupler U5, the photoelectrical coupler
Electric current is produced in the negative side loop of U5, turns on transistor Q5；Now, pcb board carries transformer output voltage by the crystal
Pipe Q5 exports a turn on thyristors signal G, so as to open IGCT master switch 3, electric current is continued by IGCT master switch 3
It is conducted to electric automobile inverse changing driving circuit 7.
When the motor 8 of electric automobile is braked or slowed down, the IGCT master switch 3 is closed, and electric current is by feedback two
2 reverse-conducting of pole pipe is input into set of cells 1.
The beneficial effects of the utility model are mainly reflected in：1st, IGCT is cheap, and size is less, is adapted in controller
Interior installation, and be adapted to work under high-voltage large current environment；2nd, IGCT automatic control switch is realized, is carried out without the need for software
Control, it is to avoid because software issue or loop fault are damaged；3rd, the precharge effect of controller is realized in perfection, it is to avoid to set of cells
And controller inner looping produces impact；4th, complete automatic control circuit as weak electrical loop with as the electronic of forceful electric power loop
The perfect adaptation in machine controller loop；5th, passage is provided for feeding back energy, further play the advantage of electric automobile energy saving.
It should be understood that, although this specification is been described by according to embodiment, but not each embodiment only includes one
Individual independent technical scheme, this narrating mode of description is only that those skilled in the art will should say for clarity
Bright book as an entirety, the technical scheme in each embodiment can also Jing it is appropriately combined, forming those skilled in the art can
With the other embodiment for understanding.
Those listed above is a series of to describe the tool for being only for feasibility embodiment of the present utility model in detail
Body illustrates that they are simultaneously not used to limit protection domain of the present utility model, all to be made without departing from this utility model skill spirit
Equivalent implementations or change are should be included within protection domain of the present utility model.
Claims (6)
1. a kind of pre-charge circuit with automatic control function, is connected to the set of cells of electric automobile（1）And controller between,
The controller is used for controlling the motor of electric automobile（8）, the controller is at least including the main capacitance for strobing（6）
And inverse changing driving circuit（7）, it is characterised in that：The pre-charge circuit is included by feedback diode（2）, IGCT master switch
（3）, NTC thermistor（4）The parallel circuit of composition, and inductive reactance connected in series（5）, the inductive reactance（5）Two
End respectively has an exit, the exit（DC+、I+）One is accessed to for controlling the IGCT master switch（3）'s
Automatic control circuit, the signal output part of the automatic control circuit（G）It is connected to the IGCT master switch（3）Signal it is defeated
Enter end.
2. the pre-charge circuit with automatic control function according to claim 1, it is characterised in that：It is described to automatically control
Circuit includes instrument amplifier circuit, and two inputs of the instrument amplifier circuit are respectively the inductive reactance（5）'s
Two exits（DC+、I+）, the instrument amplifier circuit is connected to a comparator（A3-A）Negative foot, the comparator
（A3-A）Positive foot be connected in controller pcb board and carry transformator, the comparator（A3-A）Output pin be connected to a photoelectricity
Bonder（U5）, the photoelectrical coupler（U5）Negative side loop in be connected with transistor（Q5）, the transistor（Q5）Receive
Pcb board carries the second voltage of transformator, and has signal output part（G）, the signal output part（G）It is connected to the IGCT
Master switch（3）Signal input part.
3. the pre-charge circuit with automatic control function according to claim 2, it is characterised in that：The pcb board is carried
Transformator is connected to the comparator（A3-A）The first voltage value of positive foot be stable 15V.
4. the pre-charge circuit with automatic control function according to claim 3, it is characterised in that：The pcb board is carried
Transformer output voltage is through resistance（R54、R55）Partial pressure, used as stable reference voltage.
5. the pre-charge circuit with automatic control function according to claim 2, it is characterised in that：The pcb board is carried
Transformator is connected to the transistor（Q5）Second voltage value be 5V.
6. the pre-charge circuit with automatic control function according to claim 1, it is characterised in that：It is applied to electronic vapour
Vehicle motor driver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620955841.2U CN206031104U (en) | 2016-08-26 | 2016-08-26 | Charging circuit in advance with automatic control function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620955841.2U CN206031104U (en) | 2016-08-26 | 2016-08-26 | Charging circuit in advance with automatic control function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206031104U true CN206031104U (en) | 2017-03-22 |
Family
ID=58304591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620955841.2U Expired - Fee Related CN206031104U (en) | 2016-08-26 | 2016-08-26 | Charging circuit in advance with automatic control function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206031104U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106274528A (en) * | 2016-08-26 | 2017-01-04 | 朱利东 | There is pre-charge circuit and the method for automatic control function |
| CN108923388A (en) * | 2018-08-17 | 2018-11-30 | 东菱技术有限公司 | A kind of fault detection circuit powering on buffer cell and method |
| CN109823180A (en) * | 2017-11-22 | 2019-05-31 | 上海汽车集团股份有限公司 | A kind of precharging circuit of power battery |
-
2016
- 2016-08-26 CN CN201620955841.2U patent/CN206031104U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106274528A (en) * | 2016-08-26 | 2017-01-04 | 朱利东 | There is pre-charge circuit and the method for automatic control function |
| CN109823180A (en) * | 2017-11-22 | 2019-05-31 | 上海汽车集团股份有限公司 | A kind of precharging circuit of power battery |
| CN109823180B (en) * | 2017-11-22 | 2022-04-26 | 上海汽车集团股份有限公司 | Pre-charging circuit of power battery |
| CN108923388A (en) * | 2018-08-17 | 2018-11-30 | 东菱技术有限公司 | A kind of fault detection circuit powering on buffer cell and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170322 Termination date: 20180826 |