CN108539839A - The preliminary filling device of electric machine controller - Google Patents
The preliminary filling device of electric machine controller Download PDFInfo
- Publication number
- CN108539839A CN108539839A CN201810410548.1A CN201810410548A CN108539839A CN 108539839 A CN108539839 A CN 108539839A CN 201810410548 A CN201810410548 A CN 201810410548A CN 108539839 A CN108539839 A CN 108539839A
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- Prior art keywords
- voltage
- divider resistance
- power battery
- circuit
- preliminary filling
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The present invention provides a kind of preliminary filling device of electric machine controller, including power battery, Support Capacitor, the contactor and precharging circuit being arranged between power battery anode and Support Capacitor anode；Precharging circuit includes first voltage sample circuit, second voltage sample circuit, comparison circuit, preliminary filling access and contactor drive circuit；First voltage sample circuit is electrically connected with power battery, the voltage for acquiring power battery；Second voltage sample circuit is electrically connected with Support Capacitor, the voltage for acquiring Support Capacitor；When the ratio of the voltage of Support Capacitor and power battery is not up to preset value, comparison circuit exports the first drive signal to control the conducting of preliminary filling access；When the ratio of the voltage of Support Capacitor and the voltage of power battery reaches preset value, the second drive signal of output is closed with control contactor driving circuit driving contactor.The preliminary filling device of electric machine controller provided by the invention, circuit structure is simple, cost is relatively low and response speed is very fast.
Description
【Technical field】
The present invention relates to electric machine controller technical field more particularly to a kind of preliminary filling devices of electric machine controller.
【Background technology】
In power electronics, when to capacitor charging, since the voltage at capacitance both ends generates mutation, so being started to charge up just
When will produce the high current of moment, this electric current is likely to result in the high-voltage breakdown of capacitance, it is also possible to in drive motor controller
The circuit in portion brings damage.Therefore, a pre-charge circuit can all be increased usually in high pressure or high current, major function is
To the heavy current impact of Support Capacitor when limitation powers on, mainly Support Capacitor is set slowly to charge before main contactor connection
To a certain voltage.For drive motor controller inside, pre-charging device can slow down when powering on high current to drive control device
The impact of internal circuit, especially instantaneous large-current cause to impact to module, are that starting current slowly rises as far as possible, for driving
Outside dynamic electric machine controller, pre-charging device can be with limiting starting current.
Vehicle motor controller is one of New-energy electric vehicle kernel component, is by vehicle mounted dynamic battery or super electricity
The direct current of the energy storage devices such as appearance is converted to the critical component of three-phase alternating current used in driving motor.The preliminary filling of the prior art is automatically controlled
System strategy is divided into three kinds substantially for the judgement that precharge is completed：1) electric machine controller DC bus current is acquired, direct current is worked as
Bus current completes signal close to output preliminary filling when 0A；2) electricity of vehicle-mounted electrical source of power is acquired by individual power-supply management system
Pressure, is then sent to electric machine controller by supply voltage value using bus communication and is compared, defeated when voltage tends to be equal at two
Go out preliminary filling and completes signal；3) electric machine controller acquires busbar voltage, when busbar voltage reaches the closure pressure value of setting, is closed master
Contactor was delayed after a period of time, sends out precharge and completes signal.
However, current preliminary filling is completed to judge to be required to A/D converter (analog-digital converter) and the signal condition electricity of complexity
Road is completed, and the participation of software is needed to coordinate, and then leads to that precharging circuit is complicated and cost is compared with further, since there is software
Participate in influence the response speed of precharging circuit.
In consideration of it, it is really necessary to provide a kind of preliminary filling device of new electric machine controller to overcome drawbacks described above.
【Invention content】
That the object of the present invention is to provide a kind of circuit structures is simple, cost is relatively low and the faster electric machine controller of response speed
Preliminary filling device.
To achieve the goals above, the present invention provides a kind of preliminary filling device of electric machine controller, including power battery, support
Capacitance, the contactor and precharging circuit being arranged between the power battery anode and the Support Capacitor anode；The preliminary filling
Circuit includes first voltage sample circuit, second voltage sample circuit, comparison circuit, preliminary filling access and contactor drive circuit；
The first voltage sample circuit is electrically connected with the power battery, the voltage for acquiring the power battery；Described second
Voltage sampling circuit is electrically connected with the Support Capacitor, the voltage for acquiring the Support Capacitor；The comparison circuit difference
It is connected with the first voltage sample circuit and the second voltage sample circuit, is used for the voltage of the Support Capacitor and institute
The voltage for stating power battery is compared；When the voltage of the Support Capacitor and the ratio of the power battery are not up to preset value
When, the comparison circuit exports the first drive signal and is connected with controlling the preliminary filling access；When the Support Capacitor voltage with
When the ratio of the voltage of the power battery reaches the preset value, the comparison circuit exports the second drive signal to control
Stating contactor drive circuit drives the contactor to be closed.
The preliminary filling device of electric machine controller provided by the present invention acquires power battery by first voltage sample circuit
Voltage, second voltage sample circuit acquire the voltage of Support Capacitor, when voltage and the power battery of the Support Capacitor
When ratio is not up to preset value, the comparison circuit exports the first drive signal and is connected with controlling the preliminary filling access；When described
When the ratio of the voltage of Support Capacitor and the power battery reaches preset value, the comparison circuit export the second drive signal with
Controlling the contactor drive circuit drives the contactor to be closed, and then realizes the preliminary filling to Support Capacitor and charge in advance
At judgement, avoid having used A/D converter, circuit structure is simple, and cost is relatively low, and due to not having a software participation, and circuit is rung
Answer speed fast.
【Description of the drawings】
Fig. 1 is the functional block diagram of the preliminary filling device of the electric machine controller provided in the embodiment of the present invention.
Fig. 2 is the circuit diagram of first voltage sample circuit and second voltage sample circuit in Fig. 1.
【Specific implementation mode】
It is clear in order to make the purpose of the present invention, technical solution and advantageous effects be more clear, below in conjunction with attached drawing and
Specific implementation mode, the present invention will be described in further detail.It should be understood that specific implementation described in this specification
Mode is not intended to limit the present invention just for the sake of explaining the present invention.
When an element was considered with another element " being connected ", it can be directly to another element or
It may be simultaneously present centering elements.Unless otherwise defined, all of technologies and scientific terms used here by the article and belong to this hair
The normally understood meaning of bright those skilled in the art is identical.Term used in the description of the invention herein
It is only for the purpose of describing specific embodiments and is not intended to limit the present invention.
Referring to Fig. 1, its functional block diagram for the preliminary filling device 100 of electric machine controller provided by the invention.The motor
The preliminary filling device 100 of controller includes power battery 10, Support Capacitor 20, setting in 10 anode of power battery and Support Capacitor 20
Contactor 30 between anode and precharging circuit 40.Wherein, the Support Capacitor 20, contactor 30, precharging circuit 40 are respectively positioned on
In electric machine controller.It is appreciated that the Support Capacitor 20 may include one or more, specifically, according to electric machine controller
Output capacity and determine the number of Support Capacitor 20, do not limit herein.
The precharging circuit 40 includes first voltage sample circuit 41, second voltage sample circuit 42, comparison circuit 43, pre-
Fill access 44 and contactor drive circuit 45.The first voltage sample circuit 41 is electrically connected with the power battery 10, is used for
Acquire the voltage of power battery 10.The second voltage sample circuit 42 is electrically connected with the Support Capacitor 20, for acquiring branch
Support the voltage of capacitance 20.The comparison circuit 43 is electric with the first voltage sample circuit 41 and second voltage sampling respectively
Road 42 is connected, for the voltage of Support Capacitor 20 to be compared with the voltage of power battery 10, when the Support Capacitor 20
When the voltage ratio of voltage and the power battery 10 is not up to preset value, the comparison circuit 43 export the first drive signal with
The preliminary filling access 44 is controlled to be connected；When the voltage of the Support Capacitor 20 and the ratio of the power battery 10 reach preset value
When, the comparison circuit 43 exports the second drive signal and drives the contactor 30 to close to control the contactor drive circuit 45
It closes.
The preliminary filling device 100 of the electric machine controller of offer of the present invention is acquired dynamic by first voltage sample circuit 41
The voltage of power battery 10, second voltage sample circuit 42 acquires the voltage of Support Capacitor 20, when the voltage of the Support Capacitor 20
When being not up to preset value with the ratio of the power battery 10, it is described to control that the comparison circuit 43 exports the first drive signal
Preliminary filling access 44 is connected；It is described when the ratio of the voltage of the Support Capacitor 20 and the power battery 10 reaches preset value
Comparison circuit exports the second drive signal and drives the contactor 30 to be closed to control the contactor drive circuit 45, Jin Ershi
The judgement for having showed preliminary filling and the preliminary filling completion to Support Capacitor 20, avoids having used A/D converter, and circuit structure is simple, at
This is relatively low, and due to not having software participation, circuit fast response time.
It is appreciated that when the voltage of the voltage of Support Capacitor 20 and the power battery 10 is not up to preset value, explanation
The voltage of Support Capacitor 20 is also relatively low, needs to continue to charge, at this point, comparison circuit 43 exports the first drive signal to control preliminary filling
Access 44 is connected, and then persistently charges for Support Capacitor 20.When the voltage of the voltage and the power battery 10 of Support Capacitor 20
When reaching preset value, illustrate that the voltage of Support Capacitor 20 is nearly full of, precharge at this time is completed, can be with control contactor 30
It is closed, so that electric machine controller works normally, therefore, comparison circuit 43 is exported the second drive signal and driven with control contactor
Dynamic circuit 45 works.
In one embodiment, first drive signal is high level signal, and second drive signal is low electricity
Ordinary mail number.The preset value can be 90%, and certainly, the preset value can also be set according to specific requirements.
In one embodiment, the preliminary filling access 44 includes electronic switch Q1 and preliminary filling resistance R1.The electronic switch
The first end of Q1 is connected with the anode of the power battery 10, and the second end of the electronic switch Q1 passes through the preliminary filling resistance R1
It is connected with the anode of the Support Capacitor 20, the third end of the electronic switch Q1 is connected with the comparison circuit 43, also that is, institute
State the both ends for the contact that the contactor 30 is parallel to after the electronic switch Q1 and preliminary filling resistance R1 connects.As electronic switch Q1
When closure, power battery 10 is charged by preliminary filling resistance R1 for the Support Capacitor 20, so that the voltage of Support Capacitor 20
It slowly increases, will not be mutated.
In one preferred embodiment, the first end, second end of the electronic switch Q1 and third end correspond to N respectively
Drain electrode, source electrode and the grid of type metal-oxide-semiconductor field effect transistor.
It is the circuit theory of first voltage Acquisition Circuit 41 and second voltage Acquisition Circuit 42 in Fig. 1 referring again to Fig. 2
Figure.Wherein, the first voltage Acquisition Circuit 41 includes the first divider resistance R2 and the second divider resistance R3；First partial pressure
The first end of resistance R2 is connected with the anode of the power battery 10, and the second end of the first divider resistance R2 passes through described
Two divider resistance R3 are connected with the cathode of the power battery 10.The second voltage Acquisition Circuit 42 includes third divider resistance
R4 and the 4th divider resistance R5；The first end of the third divider resistance R4 is connected with the anode of the Support Capacitor 20, described
The second end of third divider resistance R4 is connected by the 4th divider resistance R5 with the cathode of the power battery 10.
The comparison circuit 43 includes the first discrepancy terminal P1, the second input terminal P2 and leading-out terminal P3.Described first
Input terminal P1 is connected between the first divider resistance R2 and the second divider resistance R3, the second input terminal P2
Be connected between the third divider resistance R4 and the 4th divider resistance R5, the leading-out terminal P3 respectively with the preliminary filling
Access 44 is connected with the contactor drive circuit 45.
Wherein, the partial pressure that the voltage of the first input end P1 inputs is the second divider resistance R3, described second
The input voltage of input terminal P2 is the partial pressure of the 4th divider resistance R5.When the voltage of the Support Capacitor 20 is moved with described
When the voltage ratio of power battery 10 reaches preset value, the partial pressure of the 4th divider resistance R5 is equal to the second divider resistance R3
Partial pressure；When the voltage ratio of the voltage of the Support Capacitor 20 and the power battery 10 is not up to preset value, described the
Partial pressure of the partial pressure less than the second divider resistance R3 of four divider resistance R5.
It is appreciated that the first divider resistance R2 is far longer than the second divider resistance R3, and the third divides
Resistance R4 is much larger than the 4th divider resistance R5, so that the high pressure of the power battery 10 is in second divider resistance
Partial pressure on R3 is smaller, and the partial pressure of the voltage of the Support Capacitor 20 on the 4th divider resistance R5 is also smaller, to full
The control source requirement of the sufficient comparison circuit 43.
For example, in one embodiment, the first divider resistance R2 can be that 762K Ω, the second divider resistance R3 are 5K
Ω, third divider resistance R4 are 762K Ω, and the 4th divider resistance R5 is 5.6K Ω, therefore, when the voltage of power battery 10 is
When 1000V, the partial pressure of the second divider resistance R3 is 6.5V, when the ratio of Support Capacitor 20 and the voltage of the power battery 10
When value reaches preset value (for example, 89%), the voltage of Support Capacitor 20 is 890V, at this point, the partial pressure of the 4th divider resistance R5
It, therefore, can be according to the preset value of setting, and by adjusting the resistance of the first divider resistance R2 to the 4th divider resistance R5 for 6.5V
Value so that when the ratio of Support Capacitor 20 and the power battery 10 reaches preset value, point of the 4th divider resistance R5
Pressure is equal with the partial pressure of the second divider resistance R3.
Further, in one embodiment, the comparison circuit 43 may include the first input end with comparator
Sub- P1, the second input terminal P2 and leading-out terminal P3 correspond to the in-phase input end of the comparator, inverting input and defeated respectively
Outlet.
In addition, the first voltage sample circuit 41 further includes the first protection ESD (Electro-Static
Discharge the first end of) diode D1, the first protection ESD diode D1 be connected to the first divider resistance R2 with
Between the second divider resistance R3, the cathode of the second end and the power battery 10 of the first protection ESD diode D1
It is connected；The second voltage sample circuit 42 further includes the second protection ESD diode D2, the second protection ESD diode D2
First end be connected between the third divider resistance R4 and the 4th divider resistance R5, second protection ESD bis- poles
The second end of pipe D2 is connected with the cathode of the power battery 10.Wherein, the first protection ESD diode D1 and described second
Protection ESD diode D2 is damaged for preventing electric current from crossing comparison circuit 43 described in senior general.
In one embodiment, the first voltage sample circuit 41 further includes the first capacitance C1, the first capacitance C1
First end be connected between the first divider resistance R2 and the second divider resistance R3, the second of the first capacitance C1
End is connected with the cathode of the power battery 10；The second voltage sample circuit 42 further includes the second capacitance C2, and described second
The first end of capacitance C2 is connected between the third divider resistance R4 and the 4th divider resistance R5, the second capacitance C2
Second end be connected with the cathode of the power battery 10.Wherein, the first capacitance C1 and the second capacitance C2 is for preventing
The interference that only comparison circuit 43 is brought by circuit jitter, and then improve the precision and speed of the reaction of comparison circuit 43.
A kind of preliminary filling device 100 of electric machine controller of the present invention is switched when driver opens car key, more electric
Road 43 sends out the first drive signal, and then preliminary filling access 44 is driven to be connected, and charges to Support Capacitor 20, in preliminary filling process
In, precharging circuit is simultaneously compared 10 voltage value of power battery and 20 voltage value of Support Capacitor of acquisition, works as Support Capacitor
When the ratio of 20 voltages and the voltage of power battery 10 reaches preset value, comparison circuit 43 exports the second drive signal and is connect with controlling
Tentaculum driving circuit 45 drives the contact of main contactor 30 to be attracted, while preliminary filling access 44 disconnects, and then completes preliminary filling.
The present invention is not only in the description and the implementation described, therefore for the personnel of familiar field
Other advantage and modification is easily implemented, therefore in the essence without departing substantially from universal defined by claim and equivalency range
In the case of refreshing and range, the present invention is not limited to specific details, representative equipment and diagrams shown and described herein
Example.
Claims (9)
1. a kind of preliminary filling device of electric machine controller, including power battery, Support Capacitor, setting the power battery anode with
Contactor and precharging circuit between the Support Capacitor anode；It is adopted it is characterized in that, the precharging circuit includes first voltage
Sample circuit, second voltage sample circuit, comparison circuit, preliminary filling access and contactor drive circuit；The first voltage sampling electricity
Road is electrically connected with the power battery, the voltage for acquiring the power battery；The second voltage sample circuit with it is described
Support Capacitor is electrically connected, the voltage for acquiring the Support Capacitor；The comparison circuit is sampled with the first voltage respectively
Circuit and the second voltage sample circuit are connected, for by the voltage of the voltage of the Support Capacitor and the power battery into
Row compares；When the ratio of the voltage of the Support Capacitor and the power battery is not up to preset value, the comparison circuit is defeated
Go out the first drive signal and is connected with controlling the preliminary filling access；When the voltage of the voltage and the power battery of the Support Capacitor
Ratio when reaching the preset value, the comparison circuit exports the second drive signal and is driven with controlling the contactor drive circuit
The dynamic contactor is closed.
2. the preliminary filling device of electric machine controller as described in claim 1, it is characterised in that：First drive signal is high electricity
Ordinary mail number, second drive signal are low level signal.
3. the preliminary filling device of electric machine controller as described in claim 1, it is characterised in that：The preliminary filling access includes electronic cutting
Pass and preliminary filling resistance；The first end of the electronic switch is connected with the anode of the power battery, and the second of the electronic switch
End is connected by the preliminary filling resistance with the anode of the Support Capacitor, third end and the comparison circuit of the electronic switch
It is connected.
4. the preliminary filling device of electric machine controller as claimed in claim 3, it is characterised in that：The first end of the electronic switch,
Second end and third end correspond to drain electrode, source electrode and the grid of N-type metal-oxide-semiconductor field effect transistor respectively.
5. the preliminary filling device of electric machine controller as described in claim 1, it is characterised in that：The first voltage Acquisition Circuit packet
Include the first divider resistance and the second divider resistance；The first end of first divider resistance and the positive phase of the power battery
Even, the second end of first divider resistance is connected by second divider resistance with the cathode of the power battery；It is described
Second voltage Acquisition Circuit includes third divider resistance and the 4th divider resistance；The first end of the third divider resistance with it is described
The anode of Support Capacitor is connected, and the second end of the third divider resistance passes through the 4th divider resistance and the power battery
Cathode be connected；The comparison circuit includes the first discrepancy terminal, the second input terminal and leading-out terminal；The first input end
Son is connected between first divider resistance and second divider resistance, and second input terminal is connected to the third
Between divider resistance and the 4th divider resistance, the leading-out terminal drives with the preliminary filling access and the contactor respectively
Circuit is connected.
6. the preliminary filling device of electric machine controller as claimed in claim 5, it is characterised in that：When the Support Capacitor voltage with
When the ratio of the voltage of the power battery reaches the preset value, the partial pressure of the 4th divider resistance is equal to described second point
The partial pressure of piezoresistance；When the voltage ratio of the voltage of the Support Capacitor and the power battery is not up to the preset value,
Partial pressure of the partial pressure of 4th divider resistance less than second divider resistance.
7. the preliminary filling device of electric machine controller as claimed in claim 5, it is characterised in that：The comparison circuit includes to compare
Device, the first input end, second the input terminal and the output terminal correspond to the in-phase input end of the comparator, reverse phase respectively
Input terminal and output end.
8. the preliminary filling device of electric machine controller as claimed in claim 5, it is characterised in that：The first voltage sample circuit is also
Including the first protection ESD diode, the first end of the first protection ESD diode is connected to first divider resistance and institute
Between stating the second divider resistance, the second end of the first protection ESD diode is connected with the cathode of the power battery；It is described
Second voltage sample circuit further includes the second protection ESD diode, and the first end of the second protection ESD diode is connected to institute
It states between third divider resistance and the 4th divider resistance, the second end of the second protection ESD diode and the power
The cathode of battery is connected.
9. the preliminary filling device of electric machine controller as claimed in claim 8, it is characterised in that：, the first voltage sample circuit
Further include the first capacitance, the first end of first capacitance be connected to first divider resistance and second divider resistance it
Between, the second end of first capacitance is connected with the cathode of the power battery；The second voltage sample circuit further includes
The first end of two capacitances, second capacitance is connected between the third divider resistance and the 4th divider resistance, described
The second end of second capacitance is connected with the cathode of the power battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810410548.1A CN108539839A (en) | 2018-05-02 | 2018-05-02 | The preliminary filling device of electric machine controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810410548.1A CN108539839A (en) | 2018-05-02 | 2018-05-02 | The preliminary filling device of electric machine controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108539839A true CN108539839A (en) | 2018-09-14 |
Family
ID=63475926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810410548.1A Pending CN108539839A (en) | 2018-05-02 | 2018-05-02 | The preliminary filling device of electric machine controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108539839A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109515248A (en) * | 2018-12-14 | 2019-03-26 | 蜂巢能源科技有限公司 | Electric vehicle pre-charging completes decision circuitry and pre-charging device |
| CN109624788A (en) * | 2018-12-28 | 2019-04-16 | 蜂巢能源科技有限公司 | Power battery pre-charge state judges system and judgment method |
| CN112572174A (en) * | 2019-09-27 | 2021-03-30 | 比亚迪股份有限公司 | Vehicle pre-charging device and vehicle |
-
2018
- 2018-05-02 CN CN201810410548.1A patent/CN108539839A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109515248A (en) * | 2018-12-14 | 2019-03-26 | 蜂巢能源科技有限公司 | Electric vehicle pre-charging completes decision circuitry and pre-charging device |
| CN109624788A (en) * | 2018-12-28 | 2019-04-16 | 蜂巢能源科技有限公司 | Power battery pre-charge state judges system and judgment method |
| CN112572174A (en) * | 2019-09-27 | 2021-03-30 | 比亚迪股份有限公司 | Vehicle pre-charging device and vehicle |
| CN112572174B (en) * | 2019-09-27 | 2022-10-18 | 比亚迪股份有限公司 | Vehicle pre-charging device and vehicle |
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Application publication date: 20180914 |