CN103192717B - Low-voltage power supply system of hybrid power automobile and control method thereof - Google Patents
Low-voltage power supply system of hybrid power automobile and control method thereof Download PDFInfo
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- CN103192717B CN103192717B CN201310121615.5A CN201310121615A CN103192717B CN 103192717 B CN103192717 B CN 103192717B CN 201310121615 A CN201310121615 A CN 201310121615A CN 103192717 B CN103192717 B CN 103192717B
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Abstract
The invention relates to a low-voltage power supply system of a hybrid power automobile and a control method thereof and belongs to the technical field of hybrid power automobiles. The low-voltage power supply system is controlled to work according to a working state of an engine. Under the condition that the engine works, according to the whole automobile low-voltage power supply system, power is supplied to the whole automobile after a low-voltage generator, a direct current to direct current converter (DCDC converter) and a storage battery are in parallel connection with each other, and the low-voltage generator supplies power preferentially. Under an idling shutdown state, the DCDC and the storage battery supply power to the whole automobile after parallel connection, and a whole automobile load is provided preferentially by the DCDC converter. The low-voltage power supply system can not only improve efficiency and fuel saving rate, but also solve the problem of voltage insufficiency caused by introduction of an idling shutdown function.
Description
Technical field
The present invention relates to a kind of hybrid vehicle low-voltage power supply system and control method thereof, belong to Development of HEV Technology field.
Background technology
At present, to be that low voltage generator is in parallel with storage battery power the hybrid power low-voltage power supply system that market is applied afterwards to car load low-pressure system, and adopt conventional electric generators to be that car load is powered as traditional power supply mode, structure is comparatively simple, reliability is higher.But there are two shortcomings: one, because conventional low electrical generator is connected with driving engine, passive the following engine speed and change of power stage, therefore energy consumption is higher, and efficiency is lower; Two, it is one of most important energy saving technology of hybrid power system that driving engine is shut down, and when using the hybrid power system driving engine of conventional low electrical generator to shut down, low voltage generator cannot work, and will cause low pressure storage battery power shortage.
Summary of the invention
The object of this invention is to provide a kind of hybrid vehicle low-voltage power supply system and control method thereof, to solve the unconspicuous problem of hybrid power system energy-saving effect of use conventional electric generators and there is idle stop function hybrid power low pressure storage battery power shortage problem.
The present invention is for solving the problems of the technologies described above and providing a kind of hybrid vehicle low-voltage power supply system, this low-voltage power supply system comprises low-voltage power supply unit, high voltage supply unit, storage battery, super capacitor and DCDC, low-voltage power supply unit, storage battery and DCDC are attempted by vehicle low-voltage power supply bus, for powering for car load low-voltage load, super capacitor is connected to the input end of DCDC by high-voltage wiring harness, DCDC is powered by super capacitor, and super capacitor is charged by high voltage supply unit.
Described low-voltage power supply unit is low voltage generator.
Described high voltage supply unit is BSG motor.
The present invention solves the problems of the technologies described above the control method additionally providing a kind of hybrid vehicle low-voltage power supply system, and the step of this control method is as follows:
1) judge that whether the driving engine of motor vehicle driven by mixed power is in running order, if so, then low voltage generator is preferentially powered, if not, then enter step 3);
2) judge whether the power demand of car load low-voltage load is greater than low voltage generator power, if be greater than low voltage generator power, DCDC is cut with low voltage generator simultaneously for car load low-voltage load is powered;
3) if electrical generator does not work; namely under vehicle is in idle stop state; control DCDC powers preferentially to car load low-voltage load; and judge whether the demand power of car load low-voltage load is greater than the power of DCDC; if be greater than DCDC power, then storage battery is cut with DCDC simultaneously for car load low-voltage load is powered.
Described DCDC is powered by super capacitor, if the electricity of super capacitor is enough, BSG motor does not work, if super capacitor electricity is inadequate, then control BSG machine operation is also super capacitor charging.
Described when engine restart, the energy of releasing when accumulators supplements idle stop while low voltage generator and DCDC power to car load low-voltage load.
The invention has the beneficial effects as follows: the present invention works according to the working state control low-voltage power supply system of driving engine; under engine behavior; power to car load after car load low-pressure system is in parallel with storage battery by low voltage generator, DCDC; low voltage generator is preferentially powered; under idle stop state; power to car load after DCDC is in parallel with storage battery, car load load is preferentially provided by DCDC.The present invention not only can improve the efficiency of low-voltage power supply system, improves fuel saving ratio, but also can solve because introduction idle stop function causes low tension battery power shortage problem.
Accompanying drawing explanation
Fig. 1 is novel hybrid low-voltage power supply system constructional drawing.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is further described.
The embodiment of a kind of hybrid vehicle low-voltage power supply system of the present invention
As shown in Figure 1, the structure of the new hybrid vehicles low-voltage power supply system that the present invention is used as shown in Figure 1, this system comprises low voltage generator, storage battery, DCDC, super capacitor and BSG motor, low voltage generator, storage battery and DCDC are attempted by vehicle low-voltage power supply bus, for powering for car load low-voltage load, super capacitor is its charging by BSG motor, super capacitor is connected to the input end of DCDC by high-voltage wiring harness, the mouth of DCDC afterwards give car load low-voltage load in parallel with low voltage generator and storage battery is powered, wherein car load low voltage generator output voltage is 28V, DCDC output voltage is 27V, storage battery is traditional 24V storage battery.Under engine behavior, power to car load after car load low-pressure system is in parallel with storage battery by low voltage generator, DCDC, low voltage generator is preferentially powered, when car load loading demand is greater than generator power, DCDC incision and low voltage generator are simultaneously for car load is powered; Under idle stop state, power after DCDC is in parallel with storage battery to car load, car load load is preferentially provided by DCDC, and when car load loading demand is greater than DCDC power, storage battery incision and DCDC are simultaneously for car load is powered; When engine restart, the electricity of releasing when accumulators supplements idle stop while being powered to car load by low voltage generator and DCDC.
The embodiment of a kind of hybrid vehicle low-voltage power supply system control method of the present invention
The constructional drawing of hybrid vehicle low-voltage power supply system used in the present embodiment as shown in Figure 1, this novel hybrid low-voltage power supply system is made up of low voltage generator, 24V storage battery, DCDC, super capacitor and BSG motor, low voltage generator, storage battery and DCDC are attempted by vehicle low-voltage power supply bus, for powering for car load low-voltage load, super capacitor is its charging by BSG motor, super capacitor is connected to the input end of DCDC by high-voltage wiring harness, and the concrete steps of the control method of this hybrid vehicle low-voltage power supply system are as follows:
1. first judge that whether the driving engine of motor vehicle driven by mixed power is in running order, if so, then low voltage generator is preferentially powered, if not, then enter step 3.
2. judge whether the power demand of car load low-voltage load is greater than low voltage generator power, if be greater than low voltage generator power, storage battery and DCDC are cut with low voltage generator simultaneously for car load low-voltage load is powered, DCDC is powered by super capacitor, if the electricity of super capacitor is enough, BSG motor does not work, if super capacitor electricity is inadequate, then control BSG machine operation is also super capacitor charging.
If 3. electrical generator does not work; namely under vehicle is in idle stop state; control DCDC powers preferentially to car load low-voltage load; and judge whether the demand power of car load low-voltage load is greater than the power of DCDC; if be greater than DCDC power, then storage battery is cut with DCDC simultaneously for car load low-voltage load is powered.
4. when engine restart, then low voltage generator and DCDC power to car load low-voltage load while the accumulators energy of releasing when supplementing idle stop.If the electricity of super capacitor is enough, DCDC is powered by super capacitor, if the electricity of super capacitor is inadequate, then start the engine, drives BSG to be super capacitor charging.
The present invention not only can improve fuel saving ratio by the efficiency improving low-voltage power supply system, and can solve the low tension battery power shortage problem caused owing to introducing idle stop function.
Claims (6)
1. a hybrid vehicle low-voltage power supply system, it is characterized in that: this low-voltage power supply system comprises low-voltage power supply unit, high voltage supply unit, storage battery, super capacitor and DCDC, low-voltage power supply unit, storage battery and DCDC are attempted by vehicle low-voltage power supply bus, for powering for car load low-voltage load, super capacitor is connected to the input end of DCDC by high-voltage wiring harness, DCDC is powered by super capacitor, and super capacitor is charged by high voltage supply unit.
2. hybrid vehicle low-voltage power supply system according to claim 1, is characterized in that: described low-voltage power supply unit is low voltage generator.
3. hybrid vehicle low-voltage power supply system according to claim 1, is characterized in that: described high voltage supply unit is BSG motor.
4. for a control method for hybrid vehicle low-voltage power supply system according to claim 1, it is characterized in that: the step of this control method is as follows:
1) judge that whether the driving engine of motor vehicle driven by mixed power is in running order, if so, then low voltage generator is preferentially powered, if not, then enter step 3);
2) judge whether the power demand of car load low-voltage load is greater than low voltage generator power, if be greater than low voltage generator power, DCDC is cut with low voltage generator simultaneously for car load low-voltage load is powered;
3) if electrical generator does not work; namely under vehicle is in idle stop state; control DCDC powers preferentially to car load low-voltage load; and judge whether the demand power of car load low-voltage load is greater than the power of DCDC; if be greater than DCDC power, then storage battery is cut with DCDC simultaneously for car load low-voltage load is powered.
5. hybrid vehicle low-voltage power supply system control method according to claim 4, it is characterized in that: described DCDC is powered by super capacitor, if the electricity of super capacitor is enough, BSG motor does not work, if super capacitor electricity is inadequate, then control BSG machine operation is also super capacitor charging.
6. hybrid vehicle low-voltage power supply system control method according to claim 5, is characterized in that: when engine restart, the energy of releasing when accumulators supplements idle stop while low voltage generator and DCDC power to car load low-voltage load.
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| CN201310121615.5A CN103192717B (en) | 2013-04-09 | 2013-04-09 | Low-voltage power supply system of hybrid power automobile and control method thereof |
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| CN201310121615.5A CN103192717B (en) | 2013-04-09 | 2013-04-09 | Low-voltage power supply system of hybrid power automobile and control method thereof |
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| CN103192717B true CN103192717B (en) | 2015-06-10 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104129310B (en) * | 2014-07-09 | 2016-08-31 | 江苏超力电器有限公司 | A kind of auto idle speed start stop system of band brake energy regenerating |
| CN109017982B (en) * | 2015-11-13 | 2020-08-14 | 湖南南车时代电动汽车股份有限公司 | Method for controlling air compressor of electric auxiliary system for hybrid electric vehicle |
| CN106476644B (en) * | 2016-10-28 | 2020-05-29 | 安徽江淮汽车集团股份有限公司 | Heating control system and method for low-voltage hybrid power battery |
| CN109080434A (en) * | 2017-06-13 | 2018-12-25 | 郑州宇通客车股份有限公司 | A kind of planet row hybrid power system and a kind of hybrid vehicle |
| CN107458229B (en) * | 2017-07-21 | 2018-10-16 | 王震 | Automobile-used low-voltage power supply system containing DC-DC converter |
| CN109808495A (en) * | 2019-01-22 | 2019-05-28 | 浙江合众新能源汽车有限公司 | A kind of new-energy automobile of low voltage generator substitution part DC-DC converter |
| CN110696814B (en) * | 2019-11-06 | 2022-01-18 | 东风小康汽车有限公司重庆分公司 | Power supply control method and device for hybrid electric vehicle |
| CN113859048B (en) * | 2020-06-30 | 2023-06-13 | 比亚迪股份有限公司 | Vehicle power generation control method, control system and vehicle |
| CN112208360B (en) * | 2020-10-27 | 2022-03-25 | 新动力电机（荆州）有限公司 | Auxiliary low-voltage power supply system of pure electric vehicle |
| CN112477598A (en) * | 2020-12-07 | 2021-03-12 | 安徽江淮汽车集团股份有限公司 | Electric automobile low-voltage system control method, device, equipment and storage medium |
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| CN203228650U (en) * | 2013-04-09 | 2013-10-09 | 郑州宇通客车股份有限公司 | Low-voltage power supply system for hybrid power automobile |
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| KR101039679B1 (en) * | 2009-11-17 | 2011-06-09 | 현대자동차주식회사 | Mild hybrid system and method controlling thereof |
| KR101241221B1 (en) * | 2010-12-06 | 2013-03-13 | 주식회사 이지트로닉스 | Charging system for mild hybrid vehicle |
| CN102673371B (en) * | 2012-06-12 | 2016-05-04 | 福建省福工动力技术有限公司 | There is the control method of the series-parallel hybrid electric system of switch-off function |
| KR101323916B1 (en) * | 2012-10-30 | 2013-10-31 | 엘에스산전 주식회사 | Apparatus and method for early starting of vehicle |
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| CN203228650U (en) * | 2013-04-09 | 2013-10-09 | 郑州宇通客车股份有限公司 | Low-voltage power supply system for hybrid power automobile |
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Inventor after: Gao Yunqing Inventor after: Yang Guoqiang Inventor after: Wang Qingguo Inventor after: Peng Nengling Inventor after: Wan Xiaoming Inventor after: Feng Junqiang Inventor before: Gao Yunqing Inventor before: Yang Guoqiang Inventor before: Peng Nengling Inventor before: Wan Xiaoming Inventor before: Feng Junqiang |
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Address after: 450061 Yutong Road, Guancheng District, Zhengzhou City, Henan Province Patentee after: Yutong Bus Co., Ltd Address before: 450016 shibalihe Yutong Industrial Park, Zhengzhou City, Henan Province Patentee before: Zhengzhou Yutong Bus Co., Ltd |