CN103264643A - Mode control method for two-way direct current (DC)-DC converter - Google Patents
Mode control method for two-way direct current (DC)-DC converter Download PDFInfo
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- CN103264643A CN103264643A CN2013101709082A CN201310170908A CN103264643A CN 103264643 A CN103264643 A CN 103264643A CN 2013101709082 A CN2013101709082 A CN 2013101709082A CN 201310170908 A CN201310170908 A CN 201310170908A CN 103264643 A CN103264643 A CN 103264643A
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- 238000004891 communication Methods 0.000 claims abstract description 7
- 238000012544 monitoring process Methods 0.000 claims abstract description 5
- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 230000006837 decompression Effects 0.000 claims description 4
- 238000001514 detection method Methods 0.000 description 4
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- 238000010586 diagram Methods 0.000 description 2
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
Abstract
The invention aims at providing a mode control method for a two-way DC-DC converter applied to a new energy vehicle power system so as to better play roles of the two-way DC-DC converter and improve performances of the power system. The mode control method comprises that the two-way DC-DC converter is in communication connection with a vehicle management system and a motor controller, and a power interface terminal of the two-way DC-DC converter is connected with power supply ends of a high-voltage battery and the motor controller respectively to achieve electric energy transmission between the high-voltage battery and the motor controller. The mode control method is characterized in that the vehicle management system sends commands to the two-way DC-DC converter while sending the commands to the motor controller to control operation of a motor, through monitoring to a vehicle state, the working state of the two-way DC-DC converter is controlled through real-time mode switching, so that the power system is high in reliability.
Description
Technical field
The present invention relates to a kind of new-energy automobile technical field, be specifically related to the mode control method of the bi-directional DC-DC converter in the new-energy automobile.
Background technology
Bi-directional DC-DC converter is the important component part of new-energy automobile power system, it can stablize the voltage of mouth under the situation of input terminal voltage fluctuation, under forward boosts situation, since lifting voltage, can reduce the loss of electric machine, and its reverse step-down can realize that the energy in car load when braking reclaims.The key property of bi-directional DC-DC converter and control effect have directly influenced the performance figure of car load.Therefore, seem particularly important once the rational and effective control method of cover.
Summary of the invention
The objective of the invention is to propose a kind of mode control method that is applied to the bi-directional DC-DC converter of new-energy automobile power system, to bring into play the effect of bi-directional DC-DC converter better, improve the performance of power system.
The mode control method of bi-directional DC-DC converter of the present invention is as follows: this bi-directional DC-DC converter is connected with vehicle management system, electric machine controller communication, and the power interface terminal of bi-directional DC-DC converter (being direct-flow input end, the dc output end of the bi-directional DC-DC converter) power end with high-tension battery, electric machine controller respectively links to each other, to realize the electric energy transmission between high-tension battery and the electric machine controller; Key is that described vehicle management system giving an order to electric machine controller, with control drive motor work the time, this order is sent to bi-directional DC-DC converter, when drive motor controller control motor-driven, bi-directional DC-DC converter enters the forward boost mode, the voltage of high-tension battery is risen to the required voltage class of electric machine controller, supply with electric machine controller; When drive motor controller control motor carried out auxiliary braking, bi-directional DC-DC converter entered reverse decompression mode, and the voltage that the electric machine controller generating is produced drops to corresponding voltage class to power battery charging; When drive motor controller control motor was in the free time, bi-directional DC-DC converter entered idle pulley; Bi-directional DC-DC converter is monitored the mode of operation of himself in real time, when monitoring bi-directional DC-DC converter when breaking down, bi-directional DC-DC converter enters into failure mode, and can only could remove failure mode and enter other mode of operation by re-powering to bi-directional DC-DC converter.
Further, after described bi-directional DC-DC converter enters into failure mode, send alerting signal by vehicle management system, in time repair fault to remind driver and crew.
Further, described bi-directional DC-DC converter is connected by the CAN bus communication with vehicle management system, electric machine controller, shares with convenient information with bi-directional DC-DC converter and other equipment.
Specifically, described bi-directional DC-DC converter enters into failure mode after the fault that overcurrent, overvoltage, excess temperature occur.
The over current fault method of inspection is as follows: described bi-directional DC-DC converter periodically reads the electric current of its power interface terminal, surpass the lowest high-current value that allows in case detect the current value of power interface terminal, just add counting with corresponding overcurrent position of fault position, and to the count value of corresponding overcurrent failure accumulator; After the current value of power interface terminal drops in the scope of permission, with corresponding overcurrent fault position zero clearing, and the count value of corresponding overcurrent failure accumulator subtracted counting; When the count value of overcurrent failure accumulator reached the setting limit value, bi-directional DC-DC converter entered failure mode.
The overvoltage fault detection method is as follows: described bi-directional DC-DC converter periodically reads the voltage of its power interface terminal, surpass the maximum voltage value that allows in case detect the magnitude of voltage of power interface terminal, just add counting with corresponding electric voltage over press position of fault position, and to the count value of corresponding electric voltage over press failure accumulator; After the magnitude of voltage of power interface terminal drops in the scope of permission, with corresponding electric voltage over press fault position zero clearing, and the count value of corresponding electric voltage over press failure accumulator subtracted counting; When the count value of electric voltage over press failure accumulator reached the setting limit value, bi-directional DC-DC converter entered failure mode.
The excess temperature fault detection method is as follows: described bi-directional DC-DC converter descends the brachium pontis power tube to be provided with temperature sensor thereon, bi-directional DC-DC converter is the temperature of reading temperature sensor periodically, surpass the maximum temperature values that allows in case detect the temperature value of temperature sensor, just add counting with corresponding power tube excess temperature position of fault position, and to the count value of corresponding power tube excess temperature failure accumulator; After the temperature value of temperature sensor drops in the scope of permission, with the position zero clearing of corresponding power tube excess temperature fault, and the count value of corresponding power tube excess temperature failure accumulator subtracted counting; When the count value of power tube excess temperature failure accumulator reached the setting limit value, bi-directional DC-DC converter entered failure mode.
The mode control method of bi-directional DC-DC converter of the present invention distinguishes with different mode of operations that forward boosts and the reverse mode of operation of step-down, by the monitoring to whole vehicle state, switch mode is controlled the mode of operation of bi-directional DC-DC converter in real time, makes that the reliability of power system is higher.
Description of drawings
Fig. 1 is new-energy automobile power system block diagram.
Fig. 2 is the pattern transition diagram of bi-directional DC-DC converter.
The specific embodiment
Contrast accompanying drawing below, by the description to embodiment, the effect of the mutual alignment between the shape of the specific embodiment of the present invention such as related each member, structure, the each several part and annexation, each several part and principle of work etc. are described in further detail.
Embodiment 1:
As shown in Figure 1, the bi-directional DC-DC converter of present embodiment is connected by the CAN bus communication with vehicle management system, electric machine controller, and the power interface terminal of bi-directional DC-DC converter (being direct-flow input end, the dc output end of the bi-directional DC-DC converter) power end with high-tension battery, electric machine controller respectively links to each other, to realize the electric energy transmission between high-tension battery and the electric machine controller.
As shown in Figure 2, vehicle management system is being given an order to electric machine controller, with control drive motor work the time, this order is sent to bi-directional DC-DC converter, when drive motor controller control motor-driven, bi-directional DC-DC converter enters the forward boost mode, and the voltage of high-tension battery is risen to the required voltage class of electric machine controller, supplies with electric machine controller; When drive motor controller control motor carried out auxiliary braking, bi-directional DC-DC converter entered reverse decompression mode, and the voltage that the electric machine controller generating is produced drops to corresponding voltage class to power battery charging; When drive motor controller control motor was in the free time, bi-directional DC-DC converter entered idle pulley, does not carry out voltage transitions; Bi-directional DC-DC converter is monitored the mode of operation of himself in real time, when monitoring bi-directional DC-DC converter when breaking down, bi-directional DC-DC converter enters into failure mode, and can only could remove failure mode and enter other mode of operation by re-powering to bi-directional DC-DC converter.
Further, after described bi-directional DC-DC converter enters into failure mode, send alerting signal by vehicle management system, in time repair fault to remind driver and crew.
Further, described bi-directional DC-DC converter is connected by the CAN bus communication with vehicle management system, electric machine controller, shares with convenient information with bi-directional DC-DC converter and other equipment.
Specifically, described bi-directional DC-DC converter enters into failure mode after the fault that overcurrent, overvoltage, excess temperature occur.
The over current fault method of inspection is as follows: described bi-directional DC-DC converter periodically reads the electric current of its power interface terminal, surpass the lowest high-current value that allows in case detect the current value of power interface terminal, just add counting with corresponding overcurrent position of fault position, and to the count value of corresponding overcurrent failure accumulator; After the current value of power interface terminal drops in the scope of permission, with corresponding overcurrent fault position zero clearing, and the count value of corresponding overcurrent failure accumulator subtracted counting; When the count value of overcurrent failure accumulator reached the setting limit value, bi-directional DC-DC converter entered failure mode.
The overvoltage fault detection method is as follows: described bi-directional DC-DC converter periodically reads the voltage of its power interface terminal, surpass the maximum voltage value that allows in case detect the magnitude of voltage of power interface terminal, just add counting with corresponding electric voltage over press position of fault position, and to the count value of corresponding electric voltage over press failure accumulator; After the magnitude of voltage of power interface terminal drops in the scope of permission, with corresponding electric voltage over press fault position zero clearing, and the count value of corresponding electric voltage over press failure accumulator subtracted counting; When the count value of electric voltage over press failure accumulator reached the setting limit value, bi-directional DC-DC converter entered failure mode.
The excess temperature fault detection method is as follows: described bi-directional DC-DC converter descends the brachium pontis power tube to be provided with temperature sensor thereon, bi-directional DC-DC converter is the temperature of reading temperature sensor periodically, surpass the maximum temperature values that allows in case detect the temperature value of temperature sensor, just add counting with corresponding power tube excess temperature position of fault position, and to the count value of corresponding power tube excess temperature failure accumulator; After the temperature value of temperature sensor drops in the scope of permission, with the position zero clearing of corresponding power tube excess temperature fault, and the count value of corresponding power tube excess temperature failure accumulator subtracted counting; When the count value of power tube excess temperature failure accumulator reached the setting limit value, bi-directional DC-DC converter entered failure mode.
As seen from Figure 2, can switch mutually between above-mentioned idle pulley, forward boost mode, reverse three kinds of normal mode of operations of decompression mode, in case enter failure mode behind the bi-directional DC-DC converter et out of order, just can not switch to other three kinds of patterns, can only enter normal mode of operation by re-power to remove failure mode to bi-directional DC-DC converter.
Claims (7)
1. the mode control method of a bi-directional DC-DC converter, this bi-directional DC-DC converter is connected with vehicle management system, electric machine controller communication, and the power interface terminal of bi-directional DC-DC converter links to each other with the power end of high-tension battery, electric machine controller respectively, to realize the electric energy transmission between high-tension battery and the electric machine controller; It is characterized in that described vehicle management system giving an order to electric machine controller, with control drive motor work the time, this order is sent to bi-directional DC-DC converter, when drive motor controller control motor-driven, bi-directional DC-DC converter enters the forward boost mode, the voltage of high-tension battery is risen to the required voltage class of electric machine controller, supply with electric machine controller; When drive motor controller control motor carried out auxiliary braking, bi-directional DC-DC converter entered reverse decompression mode, and the voltage that the electric machine controller generating is produced drops to corresponding voltage class to power battery charging; When drive motor controller control motor was in the free time, bi-directional DC-DC converter entered idle pulley; Bi-directional DC-DC converter is monitored the mode of operation of himself in real time, when monitoring bi-directional DC-DC converter when breaking down, bi-directional DC-DC converter enters into failure mode, and can only could remove failure mode and enter other mode of operation by re-powering to bi-directional DC-DC converter.
2. the mode control method of bi-directional DC-DC converter according to claim 1, it is characterized in that described bi-directional DC-DC converter enters into failure mode after, send alerting signal by vehicle management system.
3. the mode control method of bi-directional DC-DC converter according to claim 1 is characterized in that described bi-directional DC-DC converter is connected by the CAN bus communication with vehicle management system, electric machine controller.
4. according to the mode control method of claim 1 or 2 or 3 described bi-directional DC-DC converters, it is characterized in that described bi-directional DC-DC converter after the fault that overcurrent, overvoltage, excess temperature occur, enters into failure mode.
5. the mode control method of bi-directional DC-DC converter according to claim 4, it is characterized in that described bi-directional DC-DC converter periodically reads the electric current of its power interface terminal, surpass the lowest high-current value that allows in case detect the current value of power interface terminal, just add counting with corresponding overcurrent position of fault position, and to the count value of corresponding overcurrent failure accumulator; After the current value of power interface terminal drops in the scope of permission, with corresponding overcurrent fault position zero clearing, and the count value of corresponding overcurrent failure accumulator subtracted counting; When the count value of overcurrent failure accumulator reached the setting limit value, bi-directional DC-DC converter entered failure mode.
6. the mode control method of bi-directional DC-DC converter according to claim 4, it is characterized in that described bi-directional DC-DC converter periodically reads the voltage of its power interface terminal, surpass the maximum voltage value that allows in case detect the magnitude of voltage of power interface terminal, just add counting with corresponding electric voltage over press position of fault position, and to the count value of corresponding electric voltage over press failure accumulator; After the magnitude of voltage of power interface terminal drops in the scope of permission, with corresponding electric voltage over press fault position zero clearing, and the count value of corresponding electric voltage over press failure accumulator subtracted counting; When the count value of electric voltage over press failure accumulator reached the setting limit value, bi-directional DC-DC converter entered failure mode.
7. the mode control method of bi-directional DC-DC converter according to claim 4, it is characterized in that described bi-directional DC-DC converter descends the brachium pontis power tube to be provided with temperature sensor thereon, bi-directional DC-DC converter is the temperature of reading temperature sensor periodically, surpass the maximum temperature values that allows in case detect the temperature value of temperature sensor, just add counting with corresponding power tube excess temperature position of fault position, and to the count value of corresponding power tube excess temperature failure accumulator; After the temperature value of temperature sensor drops in the scope of permission, with the position zero clearing of corresponding power tube excess temperature fault, and the count value of corresponding power tube excess temperature failure accumulator subtracted counting; When the count value of power tube excess temperature failure accumulator reached the setting limit value, bi-directional DC-DC converter entered failure mode.
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| CN201310170908.2A CN103264643B (en) | 2013-05-10 | 2013-05-10 | A kind of mode control method of bi-directional DC-DC converter |
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| CN201310170908.2A CN103264643B (en) | 2013-05-10 | 2013-05-10 | A kind of mode control method of bi-directional DC-DC converter |
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| CN103264643B CN103264643B (en) | 2016-05-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106965678A (en) * | 2017-04-07 | 2017-07-21 | 南京世博电控技术有限公司 | A kind of new energy vehicle management system based on entire car controller VMS |
| CN110208583A (en) * | 2019-05-06 | 2019-09-06 | 福建星云电子股份有限公司 | A kind of ripple current generating device based on battery core charge and discharge |
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| US20080285192A1 (en) * | 2007-05-15 | 2008-11-20 | Vijay Phadke | Power converters with rate of change monitoring for fault prediction and/or detection |
| CN101549631A (en) * | 2009-05-18 | 2009-10-07 | 奇瑞汽车股份有限公司 | Power system of simple electric vehicle operation method thereof |
| CN101916107A (en) * | 2010-08-11 | 2010-12-15 | 奇瑞汽车股份有限公司 | Control method and control device for fault diagnosis and treatment of electric automobile |
| CN202906833U (en) * | 2012-08-31 | 2013-04-24 | 浙江吉利汽车研究院有限公司杭州分公司 | Vehicle motor controller |
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2013
- 2013-05-10 CN CN201310170908.2A patent/CN103264643B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080285192A1 (en) * | 2007-05-15 | 2008-11-20 | Vijay Phadke | Power converters with rate of change monitoring for fault prediction and/or detection |
| CN101549631A (en) * | 2009-05-18 | 2009-10-07 | 奇瑞汽车股份有限公司 | Power system of simple electric vehicle operation method thereof |
| CN101916107A (en) * | 2010-08-11 | 2010-12-15 | 奇瑞汽车股份有限公司 | Control method and control device for fault diagnosis and treatment of electric automobile |
| CN202906833U (en) * | 2012-08-31 | 2013-04-24 | 浙江吉利汽车研究院有限公司杭州分公司 | Vehicle motor controller |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106965678A (en) * | 2017-04-07 | 2017-07-21 | 南京世博电控技术有限公司 | A kind of new energy vehicle management system based on entire car controller VMS |
| CN106965678B (en) * | 2017-04-07 | 2019-03-15 | 南京世博电控技术有限公司 | A kind of new energy vehicle management system based on entire car controller VMS |
| CN110208583A (en) * | 2019-05-06 | 2019-09-06 | 福建星云电子股份有限公司 | A kind of ripple current generating device based on battery core charge and discharge |
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| CN103264643B (en) | 2016-05-18 |
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