CN207096351U - A kind of novel electric vehicle high-voltage detecting device - Google Patents
A kind of novel electric vehicle high-voltage detecting device Download PDFInfo
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- CN207096351U CN207096351U CN201720697019.5U CN201720697019U CN207096351U CN 207096351 U CN207096351 U CN 207096351U CN 201720697019 U CN201720697019 U CN 201720697019U CN 207096351 U CN207096351 U CN 207096351U
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Abstract
The utility model provides a kind of new electric automobile high-voltage detection means, including resistor voltage divider circuit, current sense circuit, modulate circuit, temperature-compensation circuit, analog-to-digital conversion circuit, microcontroller, electric power management circuit and electromagnetic interference filter circuit.The present apparatus is used for the detection of the signals such as the voltage of HVDC charging inlet, the voltage of high-tension battery group and electric current, on the basis of electric resistance partial pressure module and current sensor signal conversion, integrated modulate circuit and analog-to-digital conversion circuit realize the processing such as filtering, biasing, sampling, combination temperature compensation circuit carries out signal correction, and establishes high speed serialization SPI communication mode with microcontroller.Microcontroller possesses the fault diagnosis such as the bus communication interfaces such as LIN, CAN and overvoltage, excessively stream, adhesion and protection, and data supporting is provided for automobile batteries management and full-vehicle control.Power management and EMI Filtering further ensure the reliability and signal accuracy of circuit.The utility model has the characteristics of compact-sized, integrated level is high, accuracy of detection is high, real-time is high, reliability is high, error protection is comprehensive.
Description
Technical field
The utility model belongs to electric automobile field, more particularly to a kind of novel electric vehicle high-voltage detecting device.
Background technology
Since " 13 ", New Energy Sources In China automobile industry enters boost phase by the starting stage, all the time, country and
The support policy of local government all plays an important role to the development of new-energy automobile.In being planned in " 13 ", it is proposed that
Implement new-energy automobile popularization plan, improve electric car industrialization level.Point of economic increase of the new-energy automobile as a new round,
Equally also in new-energy automobile core key part such as high-tension battery group, motor, controller, the performance of charging system, function, peace
Congruent aspect proposes new challenge.The accurate detection of high voltage parameter is to core key part performance boost and safeguard protection to closing weight
Will.From 2011, up to the present there occurs tens fire incidents, or natural accident, or collision for China's new-energy automobile
Accident, or charging accident etc., analyze it and mostly come from electric machine controller, high-tension battery group and battery management system, fill
Electric system etc. reason.Safety is the development sheet of new-energy automobile, and we are also complete while quality plan construction is strengthened
Kind monitoring system, and pay attention to technological innovation, promote product iteration.
High-tension battery group is to ensure the high voltage power supply of the enough power performance of electric automobile, have high voltage, high current it is dynamic
Power loop, operating voltage can be more than several hectovolts, and running current can reach tens of or even hundreds of amperes, transient short-circuit current
Even more it is multiplied.The charging process of electric automobile is to be filled by civil power ac-dc conversion into high pressure to high-tension battery group
Electricity, also form the loop of high-voltage great-current, charge relay occur adhesion fault or it is short-circuit when occur leaking electricity and high current
Situation.Therefore, high voltage and high current accurately and effectively detect, reliable and secure monitoring and error protection be to passenger on car
The normal work of personal safety, low-voltage electrical and vehicle control device has meaning of crucial importance.
Utility model content
The purpose of this utility model is to design a kind of novel electric vehicle high-voltage detecting device, and it can improve electric automobile
Key core part high-tension battery group, electric machine controller, charging system voltage and current parameter accuracy of detection, and safety
Monitoring and error protection reliability.
To achieve these goals, the utility model adopts the following technical scheme that：
A kind of new electric automobile high-voltage detection means, including resistor voltage divider circuit, current sense circuit, conditioning electricity
Road, temperature-compensation circuit, analog-to-digital conversion circuit, microcontroller, electric power management circuit and electromagnetic interference filter circuit；
The corresponding high-voltage signal end of the input connecting electric automobile of the electromagnetic interference filter circuit, output end connection institute
State the input of electric power management circuit, by the electric power management circuit be respectively the current sense circuit, the modulate circuit,
The temperature-compensation circuit, the analog-to-digital conversion circuit and the microcontroller provide working power；
The microcontroller has LIN EBIs, CAN interface, SPI interface, ADC interfaces, and fault diagnosis
With protection module, the LIN EBIs and the CAN interface are connected to the corresponding high-voltage signal of electric automobile
End；
The resistor voltage divider circuit, the sampling input of the current sense circuit are connected to the corresponding of electric automobile
High-voltage signal end, the resistor voltage divider circuit, the output end of the current sense circuit are respectively connecting to the modulate circuit
Input, the SPI that the output end of the modulate circuit is connected to the microcontroller by the analog-to-digital conversion circuit connect
Mouthful；
The output end of the temperature-compensation circuit connects the ADC interface of the microcontroller.
The resistor voltage divider circuit uses the resistor network being made up of resistance R1, R2, R3, R4 and R5, and resistance R1 is using super
High Precision Low Temperature floats noninductive resistance, and resistance R2, R3, R4 and R5 use the noninductive mega-ohms resistance of superhigh precision Low Drift Temperature, the electricity
The resistance precision 0.05% of network is hindered, temperature drift coefficient is 10PPM/ DEG C.
The current sense circuit reaches 0.1% and high-precision hall of the linearity error less than 0.1% using sampling precision
Isolate current sensor.
The high-precision hall isolation current sensor uses circuit board installation form.
The modulate circuit includes isolation differential amplifier and filter circuit, the differential input of the isolation differential amplifier
End connects the output end of the resistor voltage divider circuit or the output end of the current sense circuit, the differential amplification of isolation respectively
The output end of device connects the input of the filter circuit, and the output end of the filter circuit is the output of the modulate circuit
End.
The control chip of the analog-to-digital conversion circuit uses the multichannel analog numeral conversion chip that TI companies provide
ADS1118。
The electromagnetic interference filter circuit has multistage LC filter circuits.
After such scheme, electric automobile high-voltage detection means of the present utility model, in electric resistance partial pressure module and electric current
On the basis of sensor signal conversion, integrate modulate circuit and analog-to-digital conversion circuit realizes filtering, biasing, sampling etc.
Reason, combination temperature compensation circuit carries out signal correction, and establishes high speed serialization SPI communication mode with microcontroller.Microcontroller
Possess the fault diagnosis such as the bus communication interfaces such as LIN, CAN and overvoltage, excessively stream, adhesion and protection, be automobile batteries management and whole
Car control provides data supporting.Power management and EMI Filtering further ensure the reliability and signal accuracy of circuit.
The utility model can imitate improve electric automobile key core part high-tension battery group, electric machine controller, charging system voltage and
The accuracy of detection of current parameters, and with it is compact-sized, integrated level is high, accuracy of detection is high, real-time is high, reliability is high, failure
The characteristics of comprehensive is protected, the personal safety to passenger on car, and the normal work tool of the equipment such as low-voltage electrical, vehicle control device
There is meaning of crucial importance.
Brief description of the drawings
Fig. 1 is schematic block circuit diagram of the present utility model.
Fig. 2 is the schematic block circuit diagram of precision resistance bleeder circuit in the utility model.
Fig. 3 is the schematic block circuit diagram of modulate circuit in the utility model.
Fig. 4 is the fault diagnosis of microcontroller and protection module application example structured flowchart in the utility model.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with Figure of description
To be embodied, it is further described.It should be appreciated that specific embodiment described herein is only explaining that this practicality is new
Type, it is not used to limit, those skilled in the art can understand the utility model easily as the content disclosed by this specification
Other advantages and effect.Below in conjunction with the accompanying drawings to the embodiment of electric automobile high-voltage detection means of the present utility model
It is described in detail.
It is a kind of new electric automobile high-voltage detection means as shown in Figure 1, including it is precision resistance bleeder circuit 11, accurate
Resistor voltage divider circuit 12, high-precision current sensing circuit 2, modulate circuit 3, temperature-compensation circuit 4, high-precision analog numeral conversion
Circuit 5, microcontroller 6, electric power management circuit 7 and electromagnetic interference filter circuit 8.
High-tension battery group, electric machine controller or the Charging of the input connecting electric automobile of electromagnetic interference filter circuit 8
The high-voltage signal end of system, the input of the output end connection electric power management circuit 7 of electromagnetic interference filter circuit 8, by power management
Circuit 7 is respectively that modulate circuit 3, high-precision analog digital conversion circuit and microcontroller 6 provide working power；
Microcontroller 6 has LIN EBIs, CAN interface, SPI (serial communication) interface, ADC (simulation numerals
Conversion) interface, and fault diagnosis and protection module, the LIN EBIs and the CAN interface be connected to
The high-voltage signal end of the high-tension battery group of electric automobile, electric machine controller or charging system；
Precision resistance bleeder circuit 11, precision resistance bleeder circuit 12, the sampling input of high-precision current sensing circuit 2
It is connected to the high-voltage signal end of the high-tension battery group of electric automobile, electric machine controller or charging system, precision resistance partial pressure
Circuit 11, precision resistance bleeder circuit 12, the output end of high-precision current sensing circuit 2 are respectively connecting to the defeated of modulate circuit 3
Enter end, the output end of modulate circuit 3 is connected to the SPI interface of microcontroller 6 by high-precision analog digital conversion circuit 5.
The ADC interface of the output end connection microcontroller of temperature-compensation circuit 4.
During utility model works, precision resistance bleeder circuit 11,12 and high-precision current sensing circuit 2 detect electricity respectively
The voltage and current of the high-voltage signal of the high-tension battery group of electrical automobile, electric machine controller or charging system, and pass through modulate circuit 3
After the conversion process of precision analog digital conversion circuit 5, microcontroller 6 is sent to by high speed SPI interface.Microcontroller 6
The correction signal of receiving voltage, current data and collecting temperature compensation circuit 4, carry out monitoring and the fault diagnosis of high-voltage signal
With protection.Electric power management circuit 7 and electromagnetic interference filter circuit 8 are high-precision current sensing circuit 2, modulate circuit 3, temperature
Compensation circuit 4, high-precision analog digital conversion circuit 5, microcontroller 6 provide reliable clean power supply signal.
As shown in Fig. 2 precision resistance division module 11 and 12 is using the electricity being made up of resistance R1, R2, R3, R4 and R5
Hinder network, resistance R1 use superhigh precision Low Drift Temperature noninductive resistance, resistance R2, R3, R4 and R5 use superhigh precision Low Drift Temperature without
Feel mega-ohms resistance, the resistance precision 0.05% of the resistor network, temperature drift coefficient is 10PPM/ DEG C, reference voltage detection (-
1200V~1200V).Precision resistance bleeder circuit 1 realizes adopting for high voltage signal using superhigh precision Low Drift Temperature noninductive resistance
Collection, while use the noninductive mega-ohms resistance of superhigh precision Low Drift Temperature to collectively form resistor network to improve the impedance between strong and weak electricity
Property.The resistance value of each resistance can be accordingly adjusted according to the actual requirements, so as to realize the collection of high voltage signal and improve strong and weak electricity
Between resistance.
The high-precision hall isolation current sensor CAB 300- that high-precision current sensing circuit 2 is provided using LEM companies
C/SP2 realizes that high current samples, and sampling precision reaches 0.1%, and current detection range (- 350A~350A), linearity error is less than
0.1%, so as to realize the high precision test precision of electric current.This current sensor uses non-cpntact measurement, realize strong and weak electricity every
From there is very strong anti-interference, the features such as being provided simultaneously with low-power consumption, Low Drift Temperature, low drift.Further this current sensor
Circuit board installation form is used with the compactedness of intensifier.
As shown in figure 3, modulate circuit 3 includes isolation differential amplifier 31 and filter circuit 32, isolate differential amplifier 31
Differential input terminal connect precision resistance bleeder circuit 11, precision resistance bleeder circuit 12 or high-precision current sensing circuit respectively
2 output end, the input of the output end connection filter circuit 32 of isolation differential amplifier 31, the output end of filter circuit 32 are
For the output end of modulate circuit 3.In the present embodiment, modulate circuit 3 uses the isolation differential amplifier A MC1304 that TI companies provide
Design, further realizes the isolation of strong and weak electricity, improves the security of device, maximum during the amplifier gain error ± 0.2%, 5V
Nonlinearity erron is 0.075%, the low μ V/ DEG C of offset error maximum 1.3, have low noise, it is ultralow it is non-linear, error is small
Superperformance.
The temperature sensors of high precision AD7420 designs that temperature-compensation circuit 4 is provided using AD companies, precision index typical case
0.0017 DEG C of value (- 10 DEG C~+85 DEG C), ± 0.20 DEG C (- 10 DEG C~+85 DEG C), ± 0.25 DEG C (- 20 DEG C~+105 DEG C), work
Temperature range (- 40 DEG C~+150 DEG C), ± 0.015 DEG C of repeatability, meets electric automobile normal running (operation) conditions, and provide height
Fast serial communication interface.
The multichannel analog numeral conversion chip ADS1118 that high-precision analog digital conversion circuit 5 is provided using TI companies
Design, the chip include 4 passages, 16 bit resolutions, flank speed 860KSPS, successive approximation Ya De promise semiconductor modulus
Converter chip ADC, it uses multi-level differential pipelined architecture, built-in output error correction logic, ensured in whole operating temperature model
Enclose it is interior without losing code, by integrated optional direct current correction and quadrature error correction module, the direct current between the multiple passages of recoverable
Imbalance, gain and phase mismatch, a difference is used by programmable clock and data alignment, generation programmable digital test patterns etc.
Timesharing clock is inputted to control all internal conversion cycles, and optional stable duty ratio device is used for compensating larger clock duty cycle ripple
It is dynamic, while outstanding ADC overall performances are kept, accurately sensor is exported based on the analog to digital conversion circuit that A/D chips are built
Conditioning analog signal is converted to data signal needed for controller, saves controller resource, lifting system efficiency, improves total system
Control accuracy, and then ensure the accuracy and real-time of high-voltage signal sampling.
The automobile level processor S912XDP512F0MAL structures that microcontroller 6 is provided from Freescale companies are minimum
System, dominant frequency highest 80MHz, includes coprocessor XGATE, possesses 16 passage, 10 ADC interfaces, 8 passage, 8 PWM, 8 passages
512K FLASH on a variety of On-Chip peripherals and piece such as 16 TIMER, support SCI, SPI and standard CAN 2.0A/B, I2C, LIN
Etc. a variety of high-speed serial communication interfaces, bus communication interface, meet high-voltage signal data acquisition and procession, fault alarm with examining
Disconnected, communication protocol message.
Electric power management circuit 7 realizes the letter with external circuit using the insulating power supply modular converter design of Jin Shengyang companies
Number isolation, the module precision reaches 0.1%, and combines the low voltage difference power supply chip design that TI companies provide, and precision reaches
0.1%, the design requirement of the varying level such as realization ± 15V, 5V, 3.3V, be high-precision current sensing circuit 2, modulate circuit 3,
Temperature-compensation circuit 4, high-precision analog digital conversion circuit 5, microcontroller 6, each communication interface circuit, fault diagnosis and protection
Module provides accurate power supply, specific as shown in Figure 1.
The DAFP designs that electromagnetic interference filter circuit 8 is provided from TE Connectivity companies, two-stage LC filtering are set
Meter, common mode and differential mode frequency filtering 50KHz~200MHz, can effectively shield electric machine controller high power device switching frequency, fill
The electromagnetic interference of the multi-frequency sections such as electric system HF switch frequency.
As shown in figure 4, be microcontroller 6 fault diagnosis and protection module be high-voltage detecting device application HVDC fill
Electric stake carries out the application example of automobile high-voltage electricity pond group charging, and detection means detects relay S1 voltage V1, relay simultaneously
The S2 voltage V2 and input current I1 of high-tension battery group, by judge voltage V1, voltage V2, electric current I1 state can examine
Whether broken height piezoelectric battery group opens a way when charging, overvoltage, excessively stream, short circuit, and whether relay S1, S2 there is adhesion fault, together
When malfunction is fed back into entire car controller in time and battery management system is protected.Using other occasions, can equally realize
The Fault diagnosing and protecting of electric automobile core key part.
Embodiment of the present utility model is further described embodiment described above, it is impossible to assert this practicality
New embodiment is confined to these explanations.It should be pointed out that for the person of ordinary skill of the art,
Without departing from the concept of the premise utility, various modifications and improvements can be made, and property or purposes are identical, this
A little protection domains for belonging to utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (7)
- A kind of 1. new electric automobile high-voltage detection means, it is characterised in that：Including resistor voltage divider circuit, current sense electricity Road, modulate circuit, temperature-compensation circuit, analog-to-digital conversion circuit, microcontroller, electric power management circuit and EMI Filtering Circuit；The corresponding high-voltage signal end of the input connecting electric automobile of the electromagnetic interference filter circuit, output end connect the electricity The input of power management circuits by the electric power management circuit is respectively the current sense circuit, the modulate circuit, described Temperature-compensation circuit, the analog-to-digital conversion circuit and the microcontroller provide working power；The microcontroller has LIN EBIs, CAN interface, SPI interface, ADC interface, and fault diagnosis and guarantor Module is protected, the LIN EBIs and the CAN interface are connected to the corresponding high-voltage signal end of electric automobile；The resistor voltage divider circuit, the sampling input of the current sense circuit are connected to the corresponding high pressure of electric automobile Signal end, the resistor voltage divider circuit, the output end of the current sense circuit are respectively connecting to the input of the modulate circuit End, the output end of the modulate circuit are connected to the SPI interface of the microcontroller by the analog-to-digital conversion circuit；The output end of the temperature-compensation circuit connects the ADC interface of the microcontroller.
- A kind of 2. new electric automobile high-voltage detection means according to claim 1, it is characterised in that：The resistance point Volt circuit uses the resistor network being made up of resistance R1, R2, R3, R4 and R5, and resistance R1 is using superhigh precision Low Drift Temperature without electrification Resistance, resistance R2, R3, R4 and R5 use the noninductive mega-ohms resistance of superhigh precision Low Drift Temperature, the resistance precision of the resistor network 0.05%, temperature drift coefficient is 10PPM/ DEG C.
- A kind of 3. new electric automobile high-voltage detection means according to claim 1, it is characterised in that：The electric current passes Inductive circuit reaches 0.1% and high-precision hall isolation current sensor of the linearity error less than 0.1% using sampling precision.
- A kind of 4. new electric automobile high-voltage detection means according to claim 3, it is characterised in that：The high accuracy Hall isolation current sensor uses circuit board installation form.
- A kind of 5. new electric automobile high-voltage detection means according to claim 1, it is characterised in that：The conditioning electricity Road includes isolation differential amplifier and filter circuit, and the differential input terminal of the isolation differential amplifier connects the resistance respectively The output end of the output end of bleeder circuit or the current sense circuit, it is described isolation differential amplifier output end connection described in The input of filter circuit, the output end of the filter circuit are the output end of the modulate circuit.
- A kind of 6. new electric automobile high-voltage detection means according to claim 1, it is characterised in that：The simulation number The control chip of word change-over circuit uses the multichannel analog numeral conversion chip ADS1118 that TI companies provide.
- A kind of 7. new electric automobile high-voltage detection means according to claim 1, it is characterised in that：The electromagnetism is done Disturbing filter circuit has multistage LC filter circuits.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720697019.5U CN207096351U (en) | 2017-06-15 | 2017-06-15 | A kind of novel electric vehicle high-voltage detecting device |
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| CN201720697019.5U CN207096351U (en) | 2017-06-15 | 2017-06-15 | A kind of novel electric vehicle high-voltage detecting device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109116092A (en) * | 2018-08-10 | 2019-01-01 | 王泉 | A kind of digitlization current sensor module |
| CN109557866A (en) * | 2019-01-24 | 2019-04-02 | 西安深瞳智控技术有限公司 | A kind of auxiliary laser detection device realizes the power supply module and method of AGC function |
| CN111323640A (en) * | 2020-03-30 | 2020-06-23 | 周聪 | New energy automobile safety monitoring system that charges based on block chain |
-
2017
- 2017-06-15 CN CN201720697019.5U patent/CN207096351U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109116092A (en) * | 2018-08-10 | 2019-01-01 | 王泉 | A kind of digitlization current sensor module |
| CN109557866A (en) * | 2019-01-24 | 2019-04-02 | 西安深瞳智控技术有限公司 | A kind of auxiliary laser detection device realizes the power supply module and method of AGC function |
| CN109557866B (en) * | 2019-01-24 | 2023-08-18 | 西安深瞳智控技术有限公司 | Power supply assembly and method for assisting laser detection device in realizing AGC function |
| CN111323640A (en) * | 2020-03-30 | 2020-06-23 | 周聪 | New energy automobile safety monitoring system that charges based on block chain |
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