CN104750000A - High voltage electric loop control device for electric automobile - Google Patents
High voltage electric loop control device for electric automobile Download PDFInfo
- Publication number
- CN104750000A CN104750000A CN201510128633.5A CN201510128633A CN104750000A CN 104750000 A CN104750000 A CN 104750000A CN 201510128633 A CN201510128633 A CN 201510128633A CN 104750000 A CN104750000 A CN 104750000A
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- 238000009413 insulation Methods 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 230000005611 electricity Effects 0.000 claims description 49
- 238000000034 method Methods 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 7
- 238000005070 sampling Methods 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 206010014357 Electric shock Diseases 0.000 abstract description 3
- 238000007599 discharging Methods 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 abstract 2
- 239000011449 brick Substances 0.000 description 4
- 238000002955 isolation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000011217 control strategy Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a high voltage electric loop control device for an electric automobile. The control device is characterized in that a high voltage loop on-off control unit and a high voltage loop state detection unit, the high voltage loop on-off control unit finishes on-off control of a pre-charging loop, a discharging loop, a slow-charging loop and a quick charging loop. The high voltage loop state detection unit detects high voltage, current, insulation resistance and relay state parameters. By means of the structure, a high voltage loop parameter collection harness is integrated in the device, the risk of electric shock caused by damage to the high voltage loop parameter collection harness which is arranged in a battery package or on an automobile body is reduced, and separation of high voltage signals and low voltage signals is achieved. Due to space limitation of the electric automobile or the battery package at present, multiple high voltage signal wires and low voltage signal wires are arranged together, separation of the high voltage signals and the low voltage signals cannot be achieved, and interference between the high voltage signals and the low voltage signals is reduced.
Description
Technical field
The present invention relates to the high-tension electricity control field of electric automobile, particularly a kind of high-tension electricity circuit control device for electric automobile.
Background technology
Electric vehicle comprises hybrid vehicle and pure electric automobile, in electric vehicle, originally all needed to be driven by heavy-duty motor by mechanical systems such as oil-engine driven wheel, air compressor machine, steering pump, compressors of air conditioner, these heavy-duty motors just need high-voltage power supply and provide electric power.High-tension electricity circuit control device is the important component of electric motor car, to realize controlling and high-tension electricity loop parameter measuring ability high-tension electricity loop break-make.
It is simple that existing high-tension electricity controls circuit, although have overall low cost of manufacture, advantage easy for installation, uses common industrial relay to replace electric motor car special DC contactor, reduce the safety coefficient of electric motor car; Also not to the device that high tension loop voltage, electric current, insulation resistance detect, cannot judge electric motor car high tension loop state; Existing control device does not have relay status pick-up unit simultaneously, cannot judge the adhesion state of relay.
For the problems referred to above, a kind of novel high-tension electricity circuit control device is provided, improve the electrical safety of electric automobile while realizing electric automobile high-voltage fulgurite reason, and can detect parameters such as high-tension electricity loop voltage, electric current, insulation resistance, relay status.
Summary of the invention
Technical matters to be solved by this invention is, a kind of high-tension electricity circuit control device for electric automobile is provided, improve the electrical safety of electric automobile, and can detect parameters such as high-tension electricity loop voltage, electric current, insulation resistance, relay status.
For achieving the above object, technical scheme of the present invention is, a kind of high-tension electricity circuit control device for electric automobile, it is characterized in that: described control device integrates high tension loop on-off control unit and high-tension electricity loop state detecting unit, high tension loop on-off control unit completes the break-make control in precharge loop, discharge loop, charging battery loop, charging quickly loop; High-tension electricity loop state detecting unit completes the detection of high-tension electricity voltage, electric current, insulation resistance and relay status parameter.
Described high-tension electricity loop on-off control unit comprises precharge break-make control loop, effluve loop, high pressure charging battery loop, high pressure charging quickly loop; Precharge break-make control loop is made up of preliminary filling relay, preliminary filling resistance, negative pole relay, when car load high pressure powers on, suppresses the generation of dash current, protection car load high voltage component; Effluve loop is made up of positive pole and negative pole relay, is responsible for the connecting and disconnecting of battery system and car load high-voltage load, controls Brake energy recovery charging in electric discharge, braking procedure in electric motor car driving process; High pressure charging battery loop is made up of charging battery relay, negative pole relay, is responsible in charging battery process, switching on and off of charging battery loop; High pressure charging quickly loop is made up of charging quickly relay, negative pole relay, is responsible in charging quickly process, switching on and off of charging quickly loop.
Described high-tension electricity loop state detecting unit comprises voltage detecting circuit, current detection circuit, insulating resistor detecting circuit connect single-chip microcomputer respectively, single-chip microcomputer completes the conversion of signal of voltage, electric current, insulation resistance, simulating signal is converted into digital signal, and sending to battery management system by communicating circuit, battery system performs corresponding computing and operation according to the parameter received.
Described voltage detecting circuit comprises sub-resistance sampling, isolating amplifier circuit, power supply circuit composition, main circuit high pressure, by the dividing potential drop effect of resistance in series, is converted to the AD acquisition port inputting single-chip microcomputer after low voltage signal on divider resistance is amplified by isolating amplifier circuit by low-voltage again by resistance sampling circuit.
Described current detection circuit comprises high-power low resistance, isolating amplifier circuit composition, and the big current of high tension loop is converted to low voltage signal by high-power low resistance.The AD acquisition port of input single-chip microcomputer after the low voltage signal that low resistance gathers by isolating amplifier circuit above amplifies.
Described insulating resistor detecting circuit comprises booster circuit, PWM oscillating circuit, branch pressure voltage composition, system 5V is upgraded to about 40V voltage by booster circuit, the DC voltage inversion of about 40V is the low frequency pwm signal of about amplitude 40V by PWM oscillating circuit, and inject high-pressure system, the pwm signal of amplitude is converted into the pwm signal of low amplitude value by bleeder circuit, detected the amplitude size of the signal of this PWM by the AD mouth of single-chip microcomputer, judge the size of the equivalent insulation resistance between high tension loop and chassis ground.
A kind of high-tension electricity circuit control device for electric automobile, owing to adopting above-mentioned structure, the invention has the advantages that: 1, high-tension electricity loop on-off control unit and high-tension electricity loop state detecting unit are integrated composition high-tension electricity circuit control device, can high tension loop parameter acquisition wire harness be concentrated in device, decrease high tension loop parameter acquisition wire harness and be arranged in power brick or personnel that vehicle body brings due to breakage get an electric shock risk; 2, can realize high-low pressure Signal separator, at present due to the space constraint of electric motor car or power brick, many high-low pressure signal wires are arranged together, and cannot realize high-low pressure Signal separator, reduce interference each other; 3, each state parameter of high-tension electricity is gathered by detecting unit, and by CAN or LIN signal transmission to battery management system, battery management system performs corresponding control strategy and method according to correlation parameter; 4, use Special relay for electric vehicle, relay status is detected simultaneously, improve car load safety coefficient.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation;
Fig. 1 is a kind of high-tension electricity circuit control device structural representation for electric automobile of the present invention;
Fig. 2 is the structural representation of a kind of electricity of the high-tension electricity circuit control device mesohigh for electric automobile of the present invention loop state detecting unit;
In FIG, 1, high-tension electricity loop on-off control unit; 2, high-tension electricity loop state detecting unit.
Embodiment
The present invention integrates high tension loop on-off control unit 1 and high-tension electricity loop state detecting unit 2, and high tension loop on-off control unit 1 completes the break-make control in precharge loop, discharge loop, charging battery loop, charging quickly loop; High-tension electricity loop state detecting unit 2 completes the detection of high-tension electricity voltage, electric current, insulation resistance and relay status parameter.
High-tension electricity loop on-off control unit 1 can realize the break-make controlling functions in high pressure preliminary filling loop, effluve loop, high-tension electricity charging battery loop, high pressure charging quickly loop.Precharge break-make control loop is made up of preliminary filling relay, preliminary filling resistance, negative pole relay.Precharge loop, when car load high pressure powers on, can suppress the generation of dash current, protection car load high voltage component.Effluve loop is made up of positive pole and negative pole relay, is responsible for the connecting and disconnecting of battery system and car load high-voltage load, and in electric motor car driving process, in electric discharge, braking procedure, Brake energy recovery charging is completed by this loop.High pressure charging battery loop is made up of charging battery relay, negative pole relay, is responsible in charging battery process, switching on and off of charging battery loop.High pressure charging quickly loop is made up of charging quickly relay, negative pole relay, is responsible in charging quickly process, switching on and off of charging quickly loop.
High-tension electricity loop state detecting unit 2 mainly completes the measurement of high tension loop state parameter, such as the detection of cell system voltage, electric current, insulation resistance and relay status.High-tension electricity loop state detecting unit 2 comprises voltage detecting circuit, current detection circuit, insulating resistor detecting circuit, communicating circuit, feed circuit and single-chip microcomputer composition.Voltage detecting circuit can complete the collection of six road high-tension electricities, and four high voltage collection point, road location arrangements on the relay contacts, complete the judgement of each relay status by the measurement of contact voltage.Voltage detecting circuit is made up of sub-resistance sampling, isolating amplifier circuit, power supply circuit, and main circuit high pressure, by the dividing potential drop effect of resistance in series, is converted to low-voltage by resistance sampling circuit.The AD acquisition port of input single-chip microcomputer after low voltage signal on divider resistance amplifies by isolating amplifier circuit, isolating amplifier circuit achieves the electrical isolation of battery system high pressure and car load low pressure, and the normal work that feed circuit are isolating amplifier circuit provides power supply.Current detection circuit completes the detection of electric motor car charging or discharging current, and current detection circuit is made up of high-power low resistance, isolating amplifier circuit, power supply, and the big current of high tension loop is converted to low voltage signal by high-power low resistance.The AD acquisition port of input single-chip microcomputer after the low voltage signal that low resistance gathers by isolating amplifier circuit above amplifies, isolating amplifier circuit achieves the electrical isolation of battery system high pressure and car load low pressure, and the normal work that feed circuit are isolating amplifier circuit provides power supply.Adopt the current acquisition mode of low resistance relative to the current acquisition mode using current Hall moral, there is the advantage that cost is low, precision is high, be easy to layout.
Insulation resistance adopts Low frequency signal injection method, low-frequency ac signal is injected between high tension loop and ground, electric vehicle body chassis, and form loop by high tension loop, insulation resistance, chassis ground, judge the insulation resistance between high tension loop and chassis ground by the amplitude detecting low-frequency ac signal.Insulating resistor detecting circuit is made up of booster circuit, PWM oscillating circuit, branch pressure voltage.System 5V is upgraded to about 40V voltage by booster circuit, the DC voltage inversion of about 40V is the low frequency pwm signal of about amplitude 40V by PWM oscillating circuit, and inject high-pressure system, the pwm signal of amplitude is converted into the pwm signal of low amplitude value by bleeder circuit, detected the amplitude size of the signal of this PWM by the AD mouth of single-chip microcomputer, judge the size of the equivalent insulation resistance between high tension loop and chassis ground.Single-chip minimum system completes the conversion of signal of voltage, electric current, insulation resistance, and simulating signal is converted into digital signal, and sends to battery management system by communicating circuit, battery system performs corresponding computing and operation according to the parameter received.
Current most of electric motor car high-tension electricity loop on-off control unit 1 and high-tension electricity loop state detecting unit 2 arranged apart, the detection of some electric motor car high-pressure electricity loop state parameter is completed by battery management system.Position, high pressure conditions parameter signal collection point is all selected in on-off control unit, due to the space constraint of electric motor car or power brick, the high-voltage signal wire harness connected between on-off control unit and state detection unit is exposed in power brick or in electric motor car, if wearing and tearing cause high-voltage signal line to expose, the risk that personnel get an electric shock will be caused.
Above by reference to the accompanying drawings to invention has been exemplary description; obvious specific implementation of the present invention is not subject to the restrictions described above; as long as have employed the various improvement that technical solution of the present invention is carried out, or directly apply to other occasion, all within protection scope of the present invention without improving.
Claims (6)
1. the high-tension electricity circuit control device for electric automobile, it is characterized in that: described control device integrates high tension loop on-off control unit and high-tension electricity loop state detecting unit, high tension loop on-off control unit completes the break-make control in precharge loop, discharge loop, charging battery loop, charging quickly loop; High-tension electricity loop state detecting unit completes the detection of high-tension electricity voltage, electric current, insulation resistance and relay status parameter.
2. a kind of high-tension electricity circuit control device for electric automobile according to claim 1, is characterized in that: described high-tension electricity loop on-off control unit comprises precharge break-make control loop, effluve loop, high pressure charging battery loop, high pressure charging quickly loop; Precharge break-make control loop is made up of preliminary filling relay, preliminary filling resistance, negative pole relay, when car load high pressure powers on, suppresses the generation of dash current, protection car load high voltage component; Effluve loop is made up of positive pole and negative pole relay, is responsible for the connecting and disconnecting of battery system and car load high-voltage load, controls Brake energy recovery charging in electric discharge, braking procedure in electric motor car driving process; High pressure charging battery loop is made up of charging battery relay, negative pole relay, is responsible in charging battery process, switching on and off of charging battery loop; High pressure charging quickly loop is made up of charging quickly relay, negative pole relay, is responsible in charging quickly process, switching on and off of charging quickly loop.
3. a kind of high-tension electricity circuit control device for electric automobile according to claim 1, it is characterized in that: described high-tension electricity loop state detecting unit comprises voltage detecting circuit, current detection circuit, insulating resistor detecting circuit connect single-chip microcomputer respectively, single-chip microcomputer completes the conversion of signal of voltage, electric current, insulation resistance, simulating signal is converted into digital signal, and sending to battery management system by communicating circuit, battery system performs corresponding computing and operation according to the parameter received.
4. a kind of high-tension electricity circuit control device for electric automobile according to claim 3, it is characterized in that: described voltage detecting circuit comprises sub-resistance sampling, isolating amplifier circuit, power supply circuit composition, main circuit high pressure, by the dividing potential drop effect of resistance in series, is converted to the AD acquisition port inputting single-chip microcomputer after low voltage signal on divider resistance is amplified by isolating amplifier circuit by low-voltage again by resistance sampling circuit.
5. a kind of high-tension electricity circuit control device for electric automobile according to claim 3, it is characterized in that: described current detection circuit comprises high-power low resistance, isolating amplifier circuit composition, and the big current of high tension loop is converted to low voltage signal by high-power low resistance.The AD acquisition port of input single-chip microcomputer after the low voltage signal that low resistance gathers by isolating amplifier circuit above amplifies.
6. a kind of high-tension electricity circuit control device for electric automobile according to claim 3, it is characterized in that: described insulating resistor detecting circuit comprises booster circuit, PWM oscillating circuit, branch pressure voltage forms, system 5V is upgraded to about 40V voltage by booster circuit, the DC voltage inversion of about 40V is the low frequency pwm signal of about amplitude 40V by PWM oscillating circuit, and inject high-pressure system, the pwm signal of amplitude is converted into the pwm signal of low amplitude value by bleeder circuit, the amplitude size of the signal of this PWM is detected by the AD mouth of single-chip microcomputer, judge the size of the equivalent insulation resistance between high tension loop and chassis ground.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510128633.5A CN104750000B (en) | 2015-03-23 | 2015-03-23 | A kind of high-tension electricity circuit control device for electric automobile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510128633.5A CN104750000B (en) | 2015-03-23 | 2015-03-23 | A kind of high-tension electricity circuit control device for electric automobile |
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| CN104750000A true CN104750000A (en) | 2015-07-01 |
| CN104750000B CN104750000B (en) | 2018-03-16 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106080209A (en) * | 2016-07-11 | 2016-11-09 | 安庆新景技电子科技有限公司 | Vehicle high-voltage isolation control circuit |
| CN106740583A (en) * | 2017-01-17 | 2017-05-31 | 北京新能源汽车股份有限公司 | Vehicle safety control method, device and automobile |
| CN107599848A (en) * | 2017-10-23 | 2018-01-19 | 宁德时代新能源科技股份有限公司 | High voltage detection circuit, detector, battery device and vehicle |
| CN107621565A (en) * | 2017-10-23 | 2018-01-23 | 宁德时代新能源科技股份有限公司 | High voltage detection circuit, detector, battery device and vehicle |
| CN108153292A (en) * | 2018-02-01 | 2018-06-12 | 湖南意谱电动系统有限公司 | A kind of electric machine controller insulation detecting circuit |
| WO2018145397A1 (en) * | 2017-02-13 | 2018-08-16 | 上海蔚来汽车有限公司 | Diagnosis system for direct-current charging relay of vehicle |
| CN110109027A (en) * | 2018-02-01 | 2019-08-09 | 宁德时代新能源科技股份有限公司 | Battery pack insulation impedance detection circuit and device and battery management device |
| CN110109007A (en) * | 2018-02-01 | 2019-08-09 | 宁德时代新能源科技股份有限公司 | Method and device for acquiring insulation resistance values of inner side and outer side of relay |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106080209A (en) * | 2016-07-11 | 2016-11-09 | 安庆新景技电子科技有限公司 | Vehicle high-voltage isolation control circuit |
| CN106740583A (en) * | 2017-01-17 | 2017-05-31 | 北京新能源汽车股份有限公司 | Vehicle safety control method, device and automobile |
| WO2018145397A1 (en) * | 2017-02-13 | 2018-08-16 | 上海蔚来汽车有限公司 | Diagnosis system for direct-current charging relay of vehicle |
| CN107599848A (en) * | 2017-10-23 | 2018-01-19 | 宁德时代新能源科技股份有限公司 | High voltage detection circuit, detector, battery device and vehicle |
| CN107621565A (en) * | 2017-10-23 | 2018-01-23 | 宁德时代新能源科技股份有限公司 | High voltage detection circuit, detector, battery device and vehicle |
| CN107599848B (en) * | 2017-10-23 | 2023-11-17 | 宁德时代新能源科技股份有限公司 | High voltage detection circuit, detector, battery device and vehicle |
| CN107621565B (en) * | 2017-10-23 | 2024-03-22 | 宁德时代新能源科技股份有限公司 | High voltage detection circuit, detector, battery device and vehicle |
| CN108153292A (en) * | 2018-02-01 | 2018-06-12 | 湖南意谱电动系统有限公司 | A kind of electric machine controller insulation detecting circuit |
| CN110109027A (en) * | 2018-02-01 | 2019-08-09 | 宁德时代新能源科技股份有限公司 | Battery pack insulation impedance detection circuit and device and battery management device |
| CN110109007A (en) * | 2018-02-01 | 2019-08-09 | 宁德时代新能源科技股份有限公司 | Method and device for acquiring insulation resistance values of inner side and outer side of relay |
| US10996251B2 (en) | 2018-02-01 | 2021-05-04 | Contemporary Amperex Technology Co., Limited | Method and device for obtaining internal side, external side insulation resistances of relay, and battery management system |
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| CN104750000B (en) | 2018-03-16 |
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Address after: 241000 No. 226 Jin Hua Nan Road, Yijiang hi tech Industrial Development Zone, Anhui, Wuhu Patentee after: Chery New Energy Automobile Co.,Ltd. Address before: 241000 flower road, Yijiang District, Anhui, Wuhu Patentee before: CHERY NEW ENERGY AUTOMOBILE TECHNOLOGY Co.,Ltd. |