CN103448556B - A kind of safety relief method of new-energy automobile electric capacity electricity - Google Patents
A kind of safety relief method of new-energy automobile electric capacity electricity Download PDFInfo
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- CN103448556B CN103448556B CN201310453501.0A CN201310453501A CN103448556B CN 103448556 B CN103448556 B CN 103448556B CN 201310453501 A CN201310453501 A CN 201310453501A CN 103448556 B CN103448556 B CN 103448556B
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- 230000005611 electricity Effects 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000004804 winding Methods 0.000 claims abstract description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of safety relief method of new-energy automobile electric capacity electricity, when after car load KEY OFF, after MCU, VMS time delay 500ms assert that relay disconnects completely, MCU is 50A by applying motor D shaft current id, Q shaft current Ei zero, makes rotor not produce shake, by applying voltage on motor winding, consume the electricity that in MCU, electric capacity stores, complete and release.The present invention releases by there being load, can shorten the time of releasing, and improves safety.
Description
Technical field
The invention belongs to new-energy automobile security fields, relate to the management of electric capacity power secure, be specifically related to a kind of new-energy automobile method of controlling security for vent discharge electricity capacity, be applicable to pure electric automobile, hybrid vehicle, fuel cell powered vehicle.
Background technology
Along with global economic development, consumption of petroleum amount increases day by day, oil is as non-renewable resources, what just becoming is day by day in short supply, simultaneously under environmental pollution, various energy automobile arises at the historic moment, particularly oil-electric vehicle, pure electric automobile, day by day universal vigorously advocate the form of low-carbon (LC) life in country under.
Because pure electric vehicle power system is different from traditional fuel-engined vehicle, power system comprises motor, controller, its main energy sources, from the battery system of a few hectovolt, therefore, becomes the Important Problems of Ge great automobile vendor for the safe handling of pure electric automobile, maintenance problem.Car load drive system is by motor, MCU, electrokinetic cell, VMS, storage battery, DC/DC changer is formed, wherein MCU inverter control motor rotation, energy source is from electrokinetic cell, worked by VMS vehicle management system control MCU drive motor, the input of DC/DC changer is the high voltage direct current from MCU, battery charge is exported to by VMS control DC/DC, voltage when machine operation in MCU internal capacitance is consistent with power high-tension battery voltage, when high-tension battery disconnects time, could automatically release to zero volt after the electricity that in MCU, electric capacity stores wants a few minutes, if releasing period maintainer when plugging the high pressure Connector Clip of MCU, the danger of electric shock may be caused, therefore when high-voltage relay disconnects, must be the very fast electricity of electric capacity in MCU be released, avoid human contact's high pressure.
Summary of the invention
The present invention seeks to be to solve maintainer after disconnecting high voltage dc bus, how very fast in the MCU that releases, the problem of the electricity of electric capacity, avoids getting an electric shock when dismounting MCU, high voltage dc bus, guarantees personal safety.
The present invention specifically discloses a kind of safety relief method of new-energy automobile electric capacity electricity, comprises the steps:
1) when after car load KEY OFF, MCU, VMS detect KEY OFF and time delay 500ms, assert that relay disconnects;
2) MCU is by applying motor D axle one current value, and Q shaft current is zero, is applied to by a voltage on motor winding, and the D shaft current of applying makes rotor not produce shake;
3) MCU self detects whether trouble free and motor speed and whether is less than 100rpm;
4) when MCU self detects trouble free and motor speed is less than 100rpm, MCU starts to perform and initiatively releases and start the timing t1 that releases, and judges t1 whether >=3s;
5) when judging t1>=3s, MCU judges bus voltage, if bus voltage V2>36V, then determine that battery relay is sticky dead, actual not disconnection, sends buzzing and report to the police, exit the pattern of releasing; If bus voltage V2<=36V, MCU determine that battery relay disconnects, exit the pattern of releasing, complete and release.
Wherein, while step 4) MCU execution is released, the enable DC/DC work of VMS, charges a battery.When judging bus voltage V2<217V, stop DC/DC work.
Further, MCU is applied to the current value of motor D axle is 50A.
Wherein, when judging t1<3s in step 4), MCU continues to perform electric capacity and to release pattern detecting MCU fault and motor speed, exits when the two one does not satisfy condition the pattern of releasing.
The present invention releases by there being load, can shorten the time of releasing, and improves safety.And owing to not needing to carry out hardware modification, cost is almost nil.
Accompanying drawing explanation
Fig. 1: electric capacity bleed-off system block diagram;
Fig. 2: control flow chart;
Fig. 3: non-loaded lower capacitance voltage is released diagram of curves;
Fig. 4: have capacitance voltage under load to release diagram of curves.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is specifically described.
As Fig. 1, car load is when normal operation, relay S1 is in closure state, battery provides MCU(motor control unit) required voltage V1 come drive motor run, when VMS(vehicle management system) when detecting that battery tension V3 is less than 13.8V, enable DC/DC is battery charge, and the input of DC/DC connects with MCU bus end, this input voltage equals cell pressure V1, MCU bus voltage V2, i.e. V1=V2.
When car load KEY OFF(key is closed) after, MCU, VMS detect KEY OFF and time delay 500ms, relay S1 disconnects, relay S1 disconnects the actual needs time within 500ms, so MCU, VMS want time delay 500ms assert relay disconnect completely after electric capacity C1 is released, avoid too fast carry out releasing cause S1 to glue dead phenomenon.Now, MCU is that 50A, Q shaft current equals zero by applying motor D shaft current id, by applying voltage on motor winding, so just can consume the electricity that in MCU, electric capacity C1 stores, and the D shaft current of applying is unlikely to make rotor produce shake.
Then, MCU self detects whether trouble free, judge MCU trouble free and after motor speed is less than 100rpm, MCU starts to perform active and releases and start the timing t1 that releases, as t1<3s, MCU continues to perform electric capacity and to release pattern detecting MCU fault and motor speed, the pattern of releasing is exited when the two one does not satisfy condition, as t1>=3s, MCU judges bus voltage, if V2>36V, then judge that battery relay S1 is sticky dead, actual not disconnection, send buzzing to report to the police, then exit the pattern of releasing.During as judged bus voltage V2<=36V, MCU judges that battery relay S1 disconnects, and exits the pattern of releasing, completes and this time release.
Performing at MCU releases simultaneously, and the enable DC/DC work of VMS, charge a battery, consume with this electricity that in MCU, electric capacity C1 stores, auxiliary MCU carries out electric capacity and releases, and accelerates to release the time.Stop DC/DC work when judging bus voltage V2<217V, otherwise continue enable DC/DC and work.
Figure 3 shows that electric capacity is released in without external load situation, electric capacity voltage V2 ≈ about 340V own, release to 36V and need time 63S.In this case, probably cause maintainer's touching HV Terminal when maintenance MCU, have the danger of electric shock, if wait until that capacitance voltage drops to below human safety voltage simultaneously, then when MCU is operated, lose time.
Releasing under same electrical is pressed with condition of loading for electric capacity described in Fig. 4, releasing to needing time 0.13s during 36V.Compare Fig. 3, under equal voltage conditions, capacitance voltage is released and is improve the result of releasing in nearly 62s, Fig. 4 to 36V and show to complete releasing to capacitance voltage faster after car load KEY OFF, reduces the existence of danger as far as possible.
Claims (5)
1. a safety relief method for new-energy automobile electric capacity electricity, is characterized in that, comprise the steps:
1) when after car load KEY OFF, MCU, VMS detect KEY OFF and time delay 500ms, assert that relay disconnects;
2) MCU is by applying motor D axle one current value, and Q shaft current is zero, is applied to by a voltage on motor winding, and the D shaft current of applying makes rotor not produce shake;
3) MCU self detects whether trouble free and motor speed and whether is less than 100rpm;
4) when MCU self detects trouble free and motor speed is less than 100rpm, MCU starts to perform and initiatively releases and start the timing t1 that releases, and judges t1 whether >=3s;
5) when judging t1>=3s, MCU judges bus voltage, if bus voltage V2>36V, then determine that battery relay is sticky dead, actual not disconnection, sends buzzing and report to the police, exit the pattern of releasing; If bus voltage V2<=36V, MCU determine that battery relay disconnects, exit the pattern of releasing, complete and release.
2. safety relief method according to claim 1, is characterized in that: while step 4) MCU execution is released, and the enable DC/DC work of VMS, charges a battery.
3. safety relief method according to claim 2, is characterized in that: when judging bus voltage V2<217V, stops DC/DC work.
4. the safety relief method according to any one of claim 1-3, is characterized in that: the current value that MCU is applied to motor D axle is 50A.
5. the safety relief method according to any one of claim 1-3, it is characterized in that: when judging t1<3s in step 4), MCU continues to perform electric capacity and to release pattern detecting MCU fault and motor speed, exits when the two one does not satisfy condition the pattern of releasing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310453501.0A CN103448556B (en) | 2013-09-29 | 2013-09-29 | A kind of safety relief method of new-energy automobile electric capacity electricity |
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| CN201310453501.0A CN103448556B (en) | 2013-09-29 | 2013-09-29 | A kind of safety relief method of new-energy automobile electric capacity electricity |
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| CN103448556A CN103448556A (en) | 2013-12-18 |
| CN103448556B true CN103448556B (en) | 2015-08-05 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105235525A (en) * | 2015-11-05 | 2016-01-13 | 株洲南车时代电气股份有限公司 | Discharging method of supporting capacitor of electric automobile driving system |
| DE102017113162A1 (en) * | 2017-06-14 | 2018-12-20 | Phoenix Contact E-Mobility Gmbh | Method for detecting a plug-in operation |
| CN107901762B (en) * | 2017-11-06 | 2020-07-03 | 北京长城华冠汽车科技股份有限公司 | Electric automobile discharge failure processing method and system |
| CN109742933A (en) * | 2019-01-22 | 2019-05-10 | 浙江众邦机电科技有限公司 | A kind of motor driven systems and its auxiliary power-off system |
| CN111641198B (en) * | 2019-03-01 | 2023-06-13 | 杭州比亚迪汽车有限公司 | Motor controller, high-voltage bus capacitor discharging method and device thereof and vehicle |
| CN112428822A (en) * | 2019-08-07 | 2021-03-02 | 北京新能源汽车股份有限公司 | Diagnosis control method and device and electric automobile |
| CN112124078B (en) * | 2020-09-30 | 2022-04-26 | 潍柴动力股份有限公司 | Power-off control method and power-off control system of permanent magnet synchronous motor |
| CN112977089A (en) * | 2021-03-11 | 2021-06-18 | 奇瑞新能源汽车股份有限公司 | High-voltage discharge method and device, vehicle control unit and new energy electric vehicle |
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| CN101944755A (en) * | 2010-08-12 | 2011-01-12 | 上海汽车工业(集团)总公司 | Method for quickly discharging for automobile high-voltage DC bus |
| CN102371911A (en) * | 2011-10-27 | 2012-03-14 | 奇瑞汽车股份有限公司 | Method for releasing electric quantity of high-voltage bus capacitor of car motor driver |
| CN102897038A (en) * | 2011-07-26 | 2013-01-30 | 比亚迪股份有限公司 | High-voltage capacitor discharging device, method thereof and vehicle |
| CN102941815A (en) * | 2012-10-22 | 2013-02-27 | 奇瑞汽车股份有限公司 | Motor controller high voltage bus capacitance discharging method |
| CN103187760A (en) * | 2011-12-31 | 2013-07-03 | 比亚迪股份有限公司 | Electric automobile and active bleeding system used for electric automobile |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10174297A (en) * | 1996-12-17 | 1998-06-26 | Yamaha Motor Co Ltd | Discharge control method for storage battery, and its device |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101944755A (en) * | 2010-08-12 | 2011-01-12 | 上海汽车工业(集团)总公司 | Method for quickly discharging for automobile high-voltage DC bus |
| CN102897038A (en) * | 2011-07-26 | 2013-01-30 | 比亚迪股份有限公司 | High-voltage capacitor discharging device, method thereof and vehicle |
| CN102371911A (en) * | 2011-10-27 | 2012-03-14 | 奇瑞汽车股份有限公司 | Method for releasing electric quantity of high-voltage bus capacitor of car motor driver |
| CN103187760A (en) * | 2011-12-31 | 2013-07-03 | 比亚迪股份有限公司 | Electric automobile and active bleeding system used for electric automobile |
| CN102941815A (en) * | 2012-10-22 | 2013-02-27 | 奇瑞汽车股份有限公司 | Motor controller high voltage bus capacitance discharging method |
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Owner name: CHERY NEW ENERGY AUTOMOBILE TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: SAIC CHERY AUTOMOBILE CO., LTD. Effective date: 20150708 |
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Effective date of registration: 20150708 Address after: 241000 Yijiang, Anhui Province, Jin Hua Road, No. 226, South Road, No. Applicant after: New-energy automobile Technology Co., Ltd. of Cherry Address before: 241009 Wuhu economic and Technological Development Zone, Anhui, No. 8 Changchun Road Applicant before: Saic Chery Automobile Co., Ltd. |
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Address after: 241003 no.226, South Huajin Road, high tech Industrial Development Zone, Wuhu City, Anhui Province Patentee after: Chery New Energy Automobile Co.,Ltd. Address before: 241000 No. 226 Hua Jin South Road, Yijiang District, Anhui, Wuhu Patentee before: CHERY NEW ENERGY AUTOMOBILE TECHNOLOGY Co.,Ltd. |