CN208559040U - Electric vehicle high-pressure chamber contactor control system - Google Patents
Electric vehicle high-pressure chamber contactor control system Download PDFInfo
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- CN208559040U CN208559040U CN201820782178.XU CN201820782178U CN208559040U CN 208559040 U CN208559040 U CN 208559040U CN 201820782178 U CN201820782178 U CN 201820782178U CN 208559040 U CN208559040 U CN 208559040U
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- contactor
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- input terminal
- output end
- mcu
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Abstract
The utility model provides electric vehicle high-pressure chamber contactor control system, belongs to charge control technical field.The control system includes high voltage input terminal, main circuit, input terminal pressure sampling circuit, output end pressure sampling circuit, control circuit, control terminal and high-voltage output end.The utility model obtains the voltage of high voltage input terminal and high-voltage output end using input terminal pressure sampling circuit and output end pressure sampling circuit, by comparing the voltage levels of high voltage input terminal voltage and high-voltage output end voltage, the contactor closing or opening of electric vehicle high-pressure chamber charging main circuit is controlled, make to realize electrical connection between high voltage input terminal and high-voltage output end or is disconnected.The utility model can effectively avoid pre-charge contactor and main circuit contact device from being attracted in reverse differential pressure, while avoid disconnecting contact adhesion caused by contactor under reverse current.
Description
[technical field]
The utility model relates to charge control technical fields, and in particular to electric vehicle high-pressure chamber contactor control system.
[background technique]
The internal electricity of the power assembly integrated power control unit (PCU) of electric machine controller in most domestic electric vehicle at present
Device topology is as shown in Figure 1, include being internally integrated high-pressure chamber 10, TM motor driver 20, ISG motor driver 30, EPS motor to drive
Dynamic 50 5 components of device 40 and 24V DC/DC power supply.Wherein, the contactor KM1/KM2 of 10 part of high-pressure chamber carries out TM driver
20 control with the bus bar circuit on-off of ISG driver 30, and contactor KM3/KM4 carries out EPS motor driver 40 and DC/DC electricity
The bus bar circuit on-off in source 50 controls.Wherein, the control process for the contactor KM1/KM2 being related to is as follows:
(1) power on: integrated power control unit PCU receive hybrid power whole vehicle controller HCU transmission power on instruction after,
It is first attracted snubber contact device KM2, charging buffering is carried out by buffer resistance R1, bus capacitor C；After detecting bus capacitor C
After the voltage at end tends towards stability and (no longer rises), buffering course terminates, and is attracted main contactor KM1, disconnects KM2 after postponing 1S, complete
At power up.
(2) electric under: after integrated power control unit PCU receives the lower electricity instruction of hybrid power whole vehicle controller HCU transmission,
Main contactor KM1 is disconnected, lower electric process is completed.
In prior art scheme, the judgment basis that buffering terminates is powered on are as follows: the bus capacitor that the rear end bus capacitor C detects
The rear end C voltage no longer rises.But in actual vehicle operational process, it is defeated higher than power end there is bus capacitor C rear end voltage
The case where entering voltage, the i.e. rear and front end main contactor KM1 the case where there are reverse differential pressures, at this time integrated power control unit PCU
Receive hybrid power whole vehicle controller HCU transmission power on instruction after, buffered although KM2 first can be attracted, because anti-
Presence to pressure difference buffer invalidation and detects that bus capacitor rear end voltage no longer rises at this time, can be attracted main contactor at once
KM1, KM1 at this time is by closure moment, there are reversed electric currents.
In existing technical solution, the mode of lower electric process is the lower electricity instruction by receiving HCU, that is, disconnects main contact
Device.In actual application, there are motor drivers to be in the energy feedback stage, and the energy of feedback passes through main contactor KM1
It charges to lithium battery.If executing contactor open command at this time, main contactor KM1 will disconnect touching in the case where reverse current
Point.
In electric vehicle, contactor plays a part of being switched on or switched off DC power supply and electrical equipment, the touching of contactor
Point is marked with anode and cathode, it is specified that the electric current from anode inflow cathode is forward current, otherwise is reverse current.Connect or
D.C. contactor contact adhesion fault may occur when disconnection, when there are in the case where reverse current, the service life of contactor will be big
It is big to reduce, to increase the risk of probe of contactor adhesion, so that probe of contactor can not disconnect, seriously threaten driver
With the safety of overall vehicle.Patent No.: CN201410619099- electric vehicle high-pressure chamber contactor control system and its controlling party
Method cooperates the changing method of detection output voltage to provide a kind of solution closure instantaneous touch device direction electricity using counnter attack diode
Existing risk is flowed, but there is no the risks for solving reverse current present in lower electric process in patent.In addition, in the patent
All signals need to be transmitted to the controller of high-pressure chamber periphery, cause the wiring of high-pressure chamber and periphery complicated, there are circuits to connect
Make a slip of the tongue leads to failure risk more.
[utility model content]
The goal of the invention of the utility model is: lacking for existing contactor adhesion failure risk as described above is biggish
Fall into, provide it is a kind of can effectively avoid pre-charge contactor and main circuit contact device from being attracted in reverse differential pressure, avoid simultaneously
The electric vehicle high-pressure chamber contactor control system of contact adhesion caused by contactor is disconnected under reverse current.
To achieve the goals above, the technical solution adopted in the utility model is as follows:
Electric vehicle high-pressure chamber contactor control system, including high voltage input terminal, main circuit, input terminal pressure sampling circuit,
Output end pressure sampling circuit, control circuit, control terminal and high-voltage output end；
The main circuit is connected between the high voltage input terminal and the high-voltage output end, and main circuit is equipped with main circuit
Contactor KM2；
The input terminal pressure sampling circuit includes divider resistance R2, divider resistance R3 and partial pressure contactor KM3；Described point
The one end for crimping the contact tentaculum KM3 is connect with the anode of the high voltage input terminal, divides the other end and the institute of the contact contactor KM3
State divider resistance R2 connection；One end of the divider resistance R3 is connect with the cathode of the high voltage input terminal, divider resistance R3's
The series connection of divider resistance R2 described in the other end；
The output end pressure sampling circuit includes divider resistance R4, divider resistance R5 and partial pressure contactor KM4；It is described
One end of the partial pressure contact contactor KM4 is connect with the high-voltage output end anode, divides the other end and the institute of the contact contactor KM4
State divider resistance R4 connection；One end of the divider resistance R5 is connect with high-voltage output end cathode, and other the one of divider resistance R5
It connects with divider resistance R4 at end；
The control circuit includes converter, MCU and DC/DC converter；The converter have the port AD1,
The port AD2, the port A_GND, the first SPI port and converter power port, the MCU have master control SPI port, multiple controls
Mouth, MCU port and MCU power port；The port AD1 is connected between the divider resistance R2 and the divider resistance R3,
The port AD2 is connected between the divider resistance R4 and the divider resistance R5, and the port A_GND and the high pressure are defeated
Enter the cathode connection at end, first SPI port connect with the master control SPI port, the converter power port with it is described
The connection of DC/DC converter；The control mouth of the MCU and the coil port of contactor KM2, KM3, KM4 are separately connected, and are connect when enabled
When the relay port of tentaculum, corresponding contacts of contactor closure；
The control terminal includes PERCOM peripheral communication mouth and external power supply mouth, the port connection of external communication mouth and MCU
For realizing the external communication with MCU, external power supply mouth is separately connected with DC/DC converter, MCU power port for powering.
In the present invention, preferably, the high voltage input terminal is inputted as the electric energy of high-pressure chamber contactor control system,
Including anode and two terminals of cathode；Power output of the high-voltage output end as high-pressure chamber contactor control system, including
Anode and two terminals of cathode.
In the present invention, preferably, the control system further includes pre-charge circuit, the pre-charge circuit includes:
Pre-charge resistance R1, pre-charge contactor KM1, described one end preliminary filling resistance R1 are connect with high voltage input terminal anode, preliminary filling resistance
The other end is connect with pre-charge contactor KM1；One end of the contact the pre-charge contactor KM1 is connect with pre-charge resistance R1,
The other end of the contact pre-charge contactor KM1 is connect with the anode of the high-voltage output end, the control mouth and preliminary filling of the MCU
Electric contactor KM1 connection.
In the present invention, preferably, be additionally provided between first SPI port and the master control SPI port photoelectricity every
From device.
In the present invention, preferably, the MCU is single-chip microcontroller, DSP or PLC controller.
A kind of electric vehicle high-pressure chamber contactor control method provided by the utility model utilizes above-described control system
System, this method are as follows: obtain high voltage input terminal using input terminal pressure sampling circuit and output end pressure sampling circuit and high pressure is defeated
The voltage of outlet, when high voltage input terminal voltage is higher than high-voltage output end voltage, control electric vehicle high-pressure chamber charging main circuit is connect
Tentaculum closure, to make to realize electrical connection between high voltage input terminal voltage and high-voltage output end, when high voltage input terminal voltage
When lower than high-voltage output end voltage, control electric vehicle high-pressure chamber main circuit contact device disconnect, thus make high voltage input terminal voltage with
Electrical disconnect is realized between high-voltage output end.
In conclusion by adopting the above-described technical solution, the beneficial effects of the utility model are:
1, the electric vehicle high-pressure chamber contactor control system of the utility model, utilizes input terminal pressure sampling circuit and output
Pressure sampling circuit is held to obtain the voltage of high voltage input terminal and high-voltage output end, it is defeated by comparing high voltage input terminal voltage and high pressure
The voltage levels of outlet voltage, control the contactor closing or opening of electric vehicle high-pressure chamber charging main circuit, make high voltage input terminal with
Electrical connection is realized between high-voltage output end or is disconnected, and the utility model can effectively avoid pre-charge contactor and main circuit contact
Device is attracted in reverse differential pressure, while avoiding disconnecting contact adhesion caused by contactor under reverse current, improves electricity
The safety of motor-car.
2, controller is introduced into high-pressure chamber by the utility model, and controller can detecte corresponding voltage and connect to corresponding
Tentaculum is controlled, and is reduced the wiring of high-pressure chamber and periphery, is reduced line out of service risk.
[Detailed description of the invention]
Fig. 1 is the module frame chart of existing drive system of electric motor vehicle；
Fig. 2 is the schematic block diagram of the electric vehicle high-pressure chamber contactor control system of the utility model.
Wherein, 11- high voltage input terminal, 12- pre-charge circuit, 13- main circuit, 14- input terminal pressure sampling circuit, 15-
Output end pressure sampling circuit, 16- control circuit, 17- control terminal, 18- high-voltage output end.
[specific embodiment]
In order to more clearly express the utility model, the utility model is made furtherly below by way of specific embodiment
It is bright.
Referring to Fig. 2, the schematic block diagram of the electric vehicle high-pressure chamber contactor control system for the utility model, the embodiment
The electric vehicle high-pressure chamber contactor control system of offer includes high voltage input terminal 11, pre-charge circuit 12, main circuit 13, input terminal
Pressure sampling circuit 14, output end pressure sampling circuit 15, control circuit 16, control terminal 17 and high-voltage output end 18.Wherein,
The high voltage input terminal 11 is inputted as the electric energy of high-pressure chamber contactor control system, including anode and two terminals of cathode；Institute
State power output of the high-voltage output end 18 as high-pressure chamber contactor control system, including anode and two terminals of cathode.
Specifically, pre-charge circuit 12 includes pre-charge resistance R1, pre-charge contactor KM1.Wherein pre-charge resistance R1
Left end is connect with 11 anode of high voltage input terminal, and pre-charge resistance R1 right end is connect with pre-charge contactor KM1；Pre-charge contactor
The rear end KM1 is connect with 18 anode of high-voltage output end.
Specifically, main circuit 13 is connected between high voltage input terminal and high-voltage output end, in parallel with pre-charge circuit 12, main
Circuit 13 includes main circuit contact device KM2, and the main circuit contact left end device KM2 is connect with 11 anode of high voltage input terminal, and main circuit connects
Tentaculum right end is connect with 18 anode of high-voltage output end.
Specifically, input terminal pressure sampling circuit 14 is in parallel with high voltage input terminal 11, including partial pressure contactor KM3, partial pressure
Resistance R2 and divider resistance R3；The partial pressure front end contactor KM3 is connect with 11 anode of high voltage input terminal, rear end and divider resistance R2
Connection, divider resistance R2 connect with divider resistance R3, and the rear end divider resistance R3 is connect with 11 cathode of high voltage input terminal.
Output end pressure sampling circuit 15 is in parallel with high-voltage output end 18, including partial pressure contactor KM4, divider resistance R4 with
And divider resistance R5；The partial pressure front end contactor KM4 is connect with 18 anode of high-voltage output end, and rear end is connect with divider resistance R4；Point
Piezoresistance R4 connects with divider resistance R5, and the rear end divider resistance R5 is connect with 18 cathode of high-voltage output end.
Specifically, control terminal includes PERCOM peripheral communication mouth and external power supply mouth, the port company of external communication mouth and MCU
It connects for realizing the external communication with MCU, external power supply mouth is connect for high-pressure chamber contactor control system with DC/DC converter
Power supply.
Specifically, control circuit 16 includes converter, photoisolator, MCU and DC/DC converter.Wherein AD turns
Parallel operation has the port AD1, the port AD2, the port A_GND, the first SPI port and converter power port, and the MCU has master control
SPI port, multiple control mouths, MCU port and MCU power port；Converter passes through the port AD1 and input terminal partial pressure sampling electricity
The A point on road 14 connects, and is then only connected between the divider resistance R2 and the divider resistance R3；Converter passes through the port AD2
It connect, is then only connected between the divider resistance R4 and the divider resistance R5 with the B of output end pressure sampling circuit 15 point；AD
Converter is connect by the port A_GND with the C point of 11 anode of high voltage input terminal, i.e., connect with the cathode of the high voltage input terminal.
The top and bottom of the photoisolator are separately connected the first SPI port of converter and the master control SPI port of MCU, real
SPI communication between existing converter and MCU.The control mouth of MCU respectively with pre-charge contactor KM1, main circuit contact device
KM2, partial pressure contactor KM3 and partial pressure contactor KM4 connection, the MCU power port and MCU port are respectively corresponded and are controlled
The external power supply mouth at end processed is connected with PERCOM peripheral communication mouth.DC/DC converter one end is connect with converter power port, DC/
The DC converter other end is connect with external power supply mouth, realizes that the isolation of converter and MCU are powered.Wherein MCU can be monolithic
The controllers such as machine, DSP or PLC.
Specifically, converter is for AC point-to-point transmission voltage V1 and output end in detection input pressure sampling circuit 14
BC point-to-point transmission voltage V3 in pressure sampling circuit 15, and voltage value obtained is converted into electric signal, pass through photoisolator
It is transferred to MCU.Specifically, MCU is respectively contacted in control circuit for handling a received voltage value and assigning instruction to circuit
The disconnection and closure of device.MCU calculates high-voltage end output voltage V2 according to the AC point-to-point transmission voltage value V1 that receives, according to receiving
BC point-to-point transmission voltage V3 calculate high-voltage output end voltage V4, wherein V2=V1* (R2+R3)/R3, V4=V3* (R5+R4)/
R5.MCU is according to the height of high voltage input terminal voltage V2 and high-voltage output end voltage V4 to the closure and disconnection of contactor in circuit
It is controlled.
Utilize above-mentioned control system, the control method of the utility model electric vehicle high-pressure chamber contactor are as follows: utilize input
It holds pressure sampling circuit and output end pressure sampling circuit to obtain the voltage of high voltage input terminal and high-voltage output end, works as high input voltage
When voltage being held to be higher than high-voltage output end voltage, control electric vehicle high-pressure chamber charging main circuit contactor closure, to keep high pressure defeated
Enter to hold and realizes electrical connection between voltage and high-voltage output end, when high voltage input terminal voltage is lower than high-voltage output end voltage,
It controls electric vehicle high-pressure chamber main circuit contact device to disconnect, to make to realize between high voltage input terminal voltage and high-voltage output end electrical
It disconnects.
The specific steps of above-mentioned control method include: to power on buffer step, contactor rate-determining steps, lower electric buffer step.
Power on buffer step: control terminal issues MCU by PERCOM peripheral communication mouth and instructs, and partial pressure contactor KM3 is made to close splitting or integrating
It crimps tentaculum KM4 to disconnect, the voltage V1 between converter detection AC two o'clock simultaneously sends the voltage value obtained to MCU, MCU
Calculate high voltage input terminal voltage V2；Make to divide contactor KM3 disconnection, partial pressure contactor KM4 closure, converter detects BC two
Voltage V3 between point simultaneously sends the voltage value obtained to MCU, and MCU calculates high-voltage output end voltage V4；MCU calculates V5, V5
=V2-V4.Work as V5 > 0, MCU controls pre-charge contactor KM1 closure, and completion powers on buffer step；Otherwise, MCU control system weight
Multiple above-mentioned steps.
Contactor rate-determining steps: control terminal issues MCU by PERCOM peripheral communication mouth and instructs, and MCU judges the value of V5, as 0 < V5
< 10, MCU control main circuit contact device KM2 closure, pre-charge contactor KM1 is disconnected, and complete contactor rate-determining steps；Otherwise,
MCU control converter detects V1, V3 again, and calculates V2, V4, V5, and MCU control system repeats the above steps.
Lower electricity buffer step: control terminal issues MCU by PERCOM peripheral communication mouth and instructs, and MCU control converter is examined again
V1, V3 are surveyed, and sends voltage value obtained to MCU, MCU calculates V2, V4, V5, judges the value of V5.Work as V5 > 0, MCU control
Main circuit contact device KM2 processed is disconnected；Otherwise, MCU control system repeats the above steps.
Above description is the detailed description for the preferable possible embodiments of the utility model, but embodiment is not limited to
The patent claim of the utility model, the same changes or modifications completed under technical spirit suggested by all the utility model
Change, should belong to the covered the scope of the patents of the utility model.
Claims (5)
1. electric vehicle high-pressure chamber contactor control system, it is characterised in that: including high voltage input terminal, main circuit, input terminal partial pressure
Sample circuit, output end pressure sampling circuit, control circuit, control terminal and high-voltage output end；
The main circuit is connected between the high voltage input terminal and the high-voltage output end, and main circuit is equipped with main circuit contact
Device KM2；
The input terminal pressure sampling circuit includes divider resistance R2, divider resistance R3 and partial pressure contactor KM3；The partial pressure connects
The anode of one end of the contact tentaculum KM3 and the high voltage input terminal connect, divide the contact contactor KM3 the other end and described point
Piezoresistance R2 connection；One end of the divider resistance R3 is connect with the cathode of the high voltage input terminal, and divider resistance R3's is another
Hold the divider resistance R2 connection；
The output end pressure sampling circuit includes divider resistance R4, divider resistance R5 and partial pressure contactor KM4；The partial pressure
One end of the contact contactor KM4 is connect with the high-voltage output end anode, divide the contact contactor KM4 the other end with described point
Piezoresistance R4 connection；One end of the divider resistance R5 is connect with high-voltage output end cathode, the other end of divider resistance R5 with
Divider resistance R4 connection；
The control circuit includes converter, MCU and DC/DC converter；The converter has the port AD1, the end AD2
Mouth, the port A_GND, the first SPI port and converter power port, the MCU have master control SPI port, multiple control mouths,
MCU port and MCU power port；The port AD1 is connected between the divider resistance R2 and the divider resistance R3, described
The port AD2 is connected between the divider resistance R4 and the divider resistance R5, the port A_GND and the high voltage input terminal
Cathode connection, first SPI port connect with the master control SPI port, the converter power port and the DC/DC
Converter connection；The control mouth of the MCU and the coil port of contactor KM2, KM3, KM4 are separately connected, when enabled contactor
Relay port when, corresponding contacts of contactor closure；
The control terminal includes PERCOM peripheral communication mouth and external power supply mouth, and the port connection of external communication mouth and MCU are used for
Realize the external communication with MCU, external power supply mouth is separately connected with DC/DC converter, MCU power port for powering.
2. electric vehicle high-pressure chamber contactor control system according to claim 1, it is characterised in that: the high voltage input terminal
Electric energy as high-pressure chamber contactor control system inputs, including anode and two terminals of cathode；The high-voltage output end conduct
The power output of high-pressure chamber contactor control system, including anode and two terminals of cathode.
3. electric vehicle high-pressure chamber contactor control system according to claim 1, it is characterised in that: the control system is also
Including pre-charge circuit, the pre-charge circuit includes: pre-charge resistance R1, pre-charge contactor KM1, the preliminary filling resistance R1
One end is connect with high voltage input terminal anode, and the preliminary filling resistance other end is connect with pre-charge contactor KM1；The pre-charge contactor
One end of the contact KM1 is connect with pre-charge resistance R1, the other end of the contact pre-charge contactor KM1 and the high-voltage output end
Anode connection, the control mouth of the MCU connect with pre-charge contactor KM1.
4. electric vehicle high-pressure chamber contactor control system according to claim 1, it is characterised in that: the first end SPI
Photoisolator is additionally provided between mouth and the master control SPI port.
5. electric vehicle high-pressure chamber contactor control system according to claim 1, it is characterised in that: the MCU is monolithic
Machine, DSP or PLC controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820782178.XU CN208559040U (en) | 2018-05-24 | 2018-05-24 | Electric vehicle high-pressure chamber contactor control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820782178.XU CN208559040U (en) | 2018-05-24 | 2018-05-24 | Electric vehicle high-pressure chamber contactor control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208559040U true CN208559040U (en) | 2019-03-01 |
Family
ID=65482183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820782178.XU Withdrawn - After Issue CN208559040U (en) | 2018-05-24 | 2018-05-24 | Electric vehicle high-pressure chamber contactor control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208559040U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108501725A (en) * | 2018-05-24 | 2018-09-07 | 桂林理工大学 | Electric vehicle high-pressure chamber contactor control system and its control method |
-
2018
- 2018-05-24 CN CN201820782178.XU patent/CN208559040U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108501725A (en) * | 2018-05-24 | 2018-09-07 | 桂林理工大学 | Electric vehicle high-pressure chamber contactor control system and its control method |
| CN108501725B (en) * | 2018-05-24 | 2023-07-21 | 桂林理工大学 | Control system and control method for electric vehicle high-voltage bin contactor |
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