CN103264643B - A kind of mode control method of bi-directional DC-DC converter - Google Patents
A kind of mode control method of bi-directional DC-DC converter Download PDFInfo
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- CN103264643B CN103264643B CN201310170908.2A CN201310170908A CN103264643B CN 103264643 B CN103264643 B CN 103264643B CN 201310170908 A CN201310170908 A CN 201310170908A CN 103264643 B CN103264643 B CN 103264643B
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000007726 management method Methods 0.000 claims abstract description 14
- 238000004891 communication Methods 0.000 claims abstract description 7
- 238000012544 monitoring process Methods 0.000 claims abstract description 5
- 230000006837 decompression Effects 0.000 claims description 4
- 238000005183 dynamical system Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
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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
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Abstract
The object of the invention is to propose a kind of mode control method of the bi-directional DC-DC converter that is applied to new-energy automobile dynamical system, to bring into play better the effect of bi-directional DC-DC converter, improve the performance of dynamical 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 is connected with the power end of high-tension battery, electric machine controller respectively, to realize the delivery of electrical energy between high-tension battery and electric machine controller; Key is that described vehicle management system giving an order to electric machine controller, controlling the work of drive motors when, this order is sent to bi-directional DC-DC converter, by the monitoring to whole vehicle state, switch mode is controlled the duty of bi-directional DC-DC converter in real time, makes the reliability of dynamical system higher.
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 new-energy automobile.
Background technology
Bi-directional DC-DC converter is the important component part of new-energy automobile dynamical system, it can stablize the voltage of output in the situation that input terminal voltage fluctuates, under forward boosts situation, due to lifting voltage, can reduce the loss of electric machine, and its reverse step-down can realize the energy in car load when braking and reclaims. The key property of bi-directional DC-DC converter and control effect have directly affected the performance indications of car load. Therefore, a set of rational and effective control method just seems particularly important.
Summary of the invention
The object of the invention is to propose a kind of mode control method of the bi-directional DC-DC converter that is applied to new-energy automobile dynamical system, to bring into play better the effect of bi-directional DC-DC converter, improve the performance of dynamical 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 bi-directional DC-DC converter) is connected with the power end of high-tension battery, electric machine controller respectively, to realize the delivery of electrical energy between high-tension battery and electric machine controller; Key is that described vehicle management system giving an order to electric machine controller, controlling the work of drive motors when, this order is sent to bi-directional DC-DC converter, in the time that drive motor controller control motor drives, bi-directional DC-DC converter enters forward boost mode, the voltage of high-tension battery is risen to the required electric pressure of electric machine controller, supply with electric machine controller; In the time that drive motor controller control motor carries out auxiliary braking, bi-directional DC-DC converter enters reverse decompression mode, and the voltage that electric machine controller generating is produced drops to corresponding electric pressure to power battery charging; When drive motor controller control motor is during in the free time, bi-directional DC-DC converter enters idle pulley; Bi-directional DC-DC converter is monitored the duty of himself in real time, in the time monitoring bi-directional DC-DC converter and break down, bi-directional DC-DC converter enters into fault mode, and can only could remove fault mode and enter other mode of operation by re-powering to bi-directional DC-DC converter.
Further, described bi-directional DC-DC converter enters into after fault mode, sends alarm signal by vehicle management system, to remind driver and crew to repair in time fault.
Further, described bi-directional DC-DC converter is connected by CAN bus communication with vehicle management system, electric machine controller, to facilitate, the information of bi-directional DC-DC converter and other equipment is shared.
Specifically, described bi-directional DC-DC converter is occurring, after the fault of overcurrent, overvoltage, excess temperature, entering into fault mode.
Over current fault detection method is as follows: described bi-directional DC-DC converter periodically reads the electric current of its power interface terminal, once detect that the current value of power interface terminal exceedes the lowest high-current value of permission, just by corresponding overcurrent abort situation position, and the count value of corresponding overcurrent failure accumulator is added to counting; After the current value of power interface terminal drops in the scope of permission, by corresponding overcurrent fault position zero clearing, and the count value of corresponding overcurrent failure accumulator is subtracted to counting; In the time that the count value of overcurrent failure accumulator reaches setting limit value, bi-directional DC-DC converter enters fault mode.
Overvoltage fault detection method is as follows: described bi-directional DC-DC converter periodically reads the voltage of its power interface terminal, once detect that the magnitude of voltage of power interface terminal exceedes the maximum voltage value of permission, just by corresponding electric voltage over press abort situation position, and the count value of corresponding electric voltage over press failure accumulator is added to counting; After the magnitude of voltage of power interface terminal drops in the scope of permission, by corresponding electric voltage over press fault position zero clearing, and the count value of corresponding electric voltage over press failure accumulator is subtracted to counting; In the time that the count value of electric voltage over press failure accumulator reaches setting limit value, bi-directional DC-DC converter enters fault mode.
Excess temperature fault detection method is as follows: described bi-directional DC-DC converter descends brachium pontis power tube to be provided with temperature sensor thereon, bi-directional DC-DC converter is the temperature of reading temperature sensor periodically, once detect that the temperature value of temperature sensor exceedes the maximum temperature values of permission, just add counting by corresponding power tube excess temperature abort situation 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, by corresponding power tube excess temperature fault position zero clearing, and the count value of corresponding power tube excess temperature failure accumulator is subtracted to counting; In the time that the count value of power tube excess temperature failure accumulator reaches setting limit value, bi-directional DC-DC converter enters fault mode.
The mode control method of bi-directional DC-DC converter of the present invention distinguishes by different mode of operations that forward boosts and the reverse duty of step-down, by the monitoring to whole vehicle state, switch mode is controlled the duty of bi-directional DC-DC converter in real time, makes the reliability of dynamical system higher.
Brief description of the drawings
Fig. 1 is new-energy automobile dynamical system block diagram.
Fig. 2 is the pattern transition diagram of bi-directional DC-DC converter.
Detailed description of the invention
Contrast accompanying drawing below, by the description to embodiment, the specific embodiment of the present invention is described in further detail as effect and the operation principle etc. of the mutual alignment between the shape of related each member, structure, each several part and annexation, each several part.
Embodiment 1:
As shown in Figure 1, the bi-directional DC-DC converter of the present embodiment is connected by 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 bi-directional DC-DC converter) is connected with the power end of high-tension battery, electric machine controller respectively, to realize the delivery of electrical energy between high-tension battery and electric machine controller.
As shown in Figure 2, vehicle management system is being given an order to electric machine controller, controlling the work of drive motors when, this order is sent to bi-directional DC-DC converter, in the time that drive motor controller control motor drives, bi-directional DC-DC converter enters forward boost mode, and the voltage of high-tension battery is risen to the required electric pressure of electric machine controller, supplies with electric machine controller; In the time that drive motor controller control motor carries out auxiliary braking, bi-directional DC-DC converter enters reverse decompression mode, and the voltage that electric machine controller generating is produced drops to corresponding electric pressure to power battery charging; When drive motor controller control motor is during in the free time, bi-directional DC-DC converter enters idle pulley, does not carry out voltage transitions; Bi-directional DC-DC converter is monitored the duty of himself in real time, in the time monitoring bi-directional DC-DC converter and break down, bi-directional DC-DC converter enters into fault mode, and can only could remove fault mode and enter other mode of operation by re-powering to bi-directional DC-DC converter.
Further, described bi-directional DC-DC converter enters into after fault mode, sends alarm signal by vehicle management system, to remind driver and crew to repair in time fault.
Further, described bi-directional DC-DC converter is connected by CAN bus communication with vehicle management system, electric machine controller, to facilitate, the information of bi-directional DC-DC converter and other equipment is shared.
Specifically, described bi-directional DC-DC converter is occurring, after the fault of overcurrent, overvoltage, excess temperature, entering into fault mode.
Over current fault detection method is as follows: described bi-directional DC-DC converter periodically reads the electric current of its power interface terminal, once detect that the current value of power interface terminal exceedes the lowest high-current value of permission, just by corresponding overcurrent abort situation position, and the count value of corresponding overcurrent failure accumulator is added to counting; After the current value of power interface terminal drops in the scope of permission, by corresponding overcurrent fault position zero clearing, and the count value of corresponding overcurrent failure accumulator is subtracted to counting; In the time that the count value of overcurrent failure accumulator reaches setting limit value, bi-directional DC-DC converter enters fault mode.
Overvoltage fault detection method is as follows: described bi-directional DC-DC converter periodically reads the voltage of its power interface terminal, once detect that the magnitude of voltage of power interface terminal exceedes the maximum voltage value of permission, just by corresponding electric voltage over press abort situation position, and the count value of corresponding electric voltage over press failure accumulator is added to counting; After the magnitude of voltage of power interface terminal drops in the scope of permission, by corresponding electric voltage over press fault position zero clearing, and the count value of corresponding electric voltage over press failure accumulator is subtracted to counting; In the time that the count value of electric voltage over press failure accumulator reaches setting limit value, bi-directional DC-DC converter enters fault mode.
Excess temperature fault detection method is as follows: described bi-directional DC-DC converter descends brachium pontis power tube to be provided with temperature sensor thereon, bi-directional DC-DC converter is the temperature of reading temperature sensor periodically, once detect that the temperature value of temperature sensor exceedes the maximum temperature values of permission, just add counting by corresponding power tube excess temperature abort situation 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, by corresponding power tube excess temperature fault position zero clearing, and the count value of corresponding power tube excess temperature failure accumulator is subtracted to counting; In the time that the count value of power tube excess temperature failure accumulator reaches setting limit value, bi-directional DC-DC converter enters fault mode.
As seen from Figure 2, between above-mentioned idle pulley, forward boost mode, reverse three kinds of normal mode of operations of decompression mode, can switch mutually, once enter fault mode after bi-directional DC-DC converter breaks down, just can not be switched to other three kinds of patterns, can only, by re-power to remove fault mode to bi-directional DC-DC converter, enter normal mode of operation.
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 is connected with the power end of high-tension battery, electric machine controller respectively, to realize the delivery of electrical energy between high-tension battery and electric machine controller; It is characterized in that described vehicle management system giving an order to electric machine controller, controlling the work of drive motors when, this order is sent to bi-directional DC-DC converter, in the time that drive motor controller control motor drives, bi-directional DC-DC converter enters forward boost mode, the voltage of high-tension battery is risen to the required electric pressure of electric machine controller, supply with electric machine controller; In the time that drive motor controller control motor carries out auxiliary braking, bi-directional DC-DC converter enters reverse decompression mode, and the voltage that electric machine controller generating is produced drops to corresponding electric pressure to power battery charging; When drive motor controller control motor is during in the free time, bi-directional DC-DC converter enters idle pulley; Bi-directional DC-DC converter is monitored the duty of himself in real time, in the time monitoring bi-directional DC-DC converter and break down, bi-directional DC-DC converter enters into fault mode, and can only could remove fault 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, is characterized in that described bi-directional DC-DC converter enters into after fault mode, sends alarm 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 CAN bus communication with vehicle management system, electric machine controller.
4. according to the mode control method of the bi-directional DC-DC converter described in claim 1 or 2 or 3, it is characterized in that described bi-directional DC-DC converter is occurring, after the fault of overcurrent, overvoltage, excess temperature, entering into fault 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, once detect that the current value of power interface terminal exceedes the lowest high-current value of permission, just add counting by the set of corresponding overcurrent fault flag, and to the count value of corresponding overcurrent failure accumulator; After the current value of power interface terminal drops in the scope of permission, by the zero clearing of corresponding overcurrent fault flag, and the count value of corresponding overcurrent failure accumulator is subtracted to counting; In the time that the count value of overcurrent failure accumulator reaches setting limit value, bi-directional DC-DC converter enters fault 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, once detect that the magnitude of voltage of power interface terminal exceedes the maximum voltage value of permission, just add counting by the set of corresponding electric voltage over press fault flag, 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, by the zero clearing of corresponding electric voltage over press fault flag, and the count value of corresponding electric voltage over press failure accumulator is subtracted to counting; In the time that the count value of electric voltage over press failure accumulator reaches setting limit value, bi-directional DC-DC converter enters fault 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 brachium pontis power tube to be provided with temperature sensor thereon, bi-directional DC-DC converter is the temperature of reading temperature sensor periodically, once detect that the temperature value of temperature sensor exceedes the maximum temperature values of permission, just add counting by the set of corresponding power tube excess temperature fault flag, 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, by the zero clearing of corresponding power tube excess temperature fault flag, and the count value of corresponding power tube excess temperature failure accumulator is subtracted to counting; In the time that the count value of power tube excess temperature failure accumulator reaches setting limit value, bi-directional DC-DC converter enters fault mode.
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| Application Number | Priority Date | Filing Date | Title |
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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 true CN103264643B (en) | 2016-05-18 |
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| 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 |
| CN110208583B (en) * | 2019-05-06 | 2022-02-18 | 福建星云电子股份有限公司 | Ripple current generating device based on battery core charging and discharging |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7719812B2 (en) * | 2007-05-15 | 2010-05-18 | Astec International Limited | Power converters with rate of change monitoring for fault prediction and/or detection |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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