CN103832290A - DC/DC control method in working mode - Google Patents
DC/DC control method in working mode Download PDFInfo
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- CN103832290A CN103832290A CN201310715300.3A CN201310715300A CN103832290A CN 103832290 A CN103832290 A CN 103832290A CN 201310715300 A CN201310715300 A CN 201310715300A CN 103832290 A CN103832290 A CN 103832290A
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- Prior art keywords
- relay
- control method
- electric vehicle
- standard value
- mode
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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
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a DC/DC control method in a working mode. The DC/DC control method includes the following steps that S101, whether a low-voltage power source of an electric vehicle is lower than a first standard value or not is checked, if yes, a DC/DC relay is controlled to be closed to send an instruction, and if not, the DC/DC relay is controlled to be in a disconnection state; S102, whether the low-voltage power source is higher than a second standard value or not is judged, if yes, a physique command is sent to the DC/DC relay, and if not, the low-voltage power source is continuously charged; S103, whether the electric vehicle is powered up at high voltage or not is judged, if yes, the S101 is continuously executed, and if not, the DC/DC relay stops working until the electric vehicle is at high voltage again. Therefore, safety of the electric vehicle can be improved, besides, the traveling distance of the electric vehicle can be increased, and it is avoided that once the electric vehicle works, the DC/DC relay works till the electric vehicle does not work, so that the consumed electric quantity of a high-voltage storage battery is large, and then certain traveling distance will be wasted.
Description
Technical field
The present invention relates to battery management field, particularly the control method to DC/DC under a kind of mode of operation.
Background technology
Current battery management system is typically equipped with storage battery, using the back-up source after power failure.The electric energy of battery stores is limited, and the what is called that power-supply system all has under low pressure substantially " is descended electricity " or the battery protection function of " the too low automatic shutdown of cell pressure ".After civil power power-off, along with the electric discharge of battery pack, the reducing of capacity of cell; cell pressure can decline, in order to protect battery, in the time that the voltage drop of battery pack arrives a certain value; be this value while being called voltage below level automatic shutdown voltage, cut off all or part of, load.This operation voltage value is a very important parameter to battery pack and even whole power-supply system.By great many of experiments and theoretical analysis, find the improper direct relation that has that arranges of the overdischarge of storage battery and lower piezoelectric voltage point.
For current electronlmobil low potential source used, in the time that the electricity of low potential source soon exhausts, can cause the operation irregularity of some low-voltage equipments, the safety problem that more can cause vehicle to occur in operational process, when low-voltage power supply is in the time that electricity soon exhausts, cause electronic device works abnormal.From above-mentioned situation, we are necessary to charge to it when the electricity of electric car power supply soon exhausts, to prevent because voltage source electric weight is too low, and cause the operation irregularity of miscellaneous equipment, thereby cause the safety problem of vehicle.
Summary of the invention
Technical matters of the present invention is to provide the control method to DC/DC under a kind of mode of operation.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is:
Control method to DC/DC under a kind of mode of operation, comprise the steps: S101: in the situation that battery management system enters mode of operation, check that whether the low potential source of electronlmobil is lower than the first standard value, if just control DC/DC relay closes and send instruction, just controlling if not DC/DC relay is off-state; S102: judge that whether the low potential source of electronlmobil is higher than the second standard value, if it is physique order, to DC/DC relay, is charged to low potential source with regard to continuing if not; S103: judge whether electric automobile high-voltage powers on, if it is continue to judge S101, if otherwise DC/DC relay quit work, till knowing and again going up high pressure.
As further technical scheme, the first standard value V
1for V
cC* Q
1q
2/ (Q
-1+ Q
2), wherein Q
1for minimum charge value, Q
2for the highest charge value.
As further technical scheme, the second standard value V
2for V
cC* (Q
1+ Q
2)/Q
1q
2,wherein Q
1for minimum charge value, Q
2for the highest charge value.
As further technical scheme, the minimum working power of low potential source is corresponding rating horsepower 2V
cC 2/ (Q
1+ Q
2).
Compared with prior art, the present invention has following advantage and beneficial effect:
Not only can increase the safety of battery-driven car with above-mentioned this control policy, can also increase the travelled distance of battery-driven car, avoid battery-driven car one work, DC/DC relay is work just, until battery-driven car is not worked, the electric weight that consumes like this high tension battery is just many, can sacrifice certain travelled distance.
Brief description of the drawings
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, in describing embodiment below, needed accompanying drawing does simple introduction, apparent, accompanying drawing described below is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the diagram of circuit of the control method to DC/DC under a kind of mode of operation of the present invention.
Detailed description of the invention
By reference to the accompanying drawings technical scheme of the present invention is carried out to clear, complete description below by detailed description of the invention; obviously; described embodiment is only a part of embodiment of the present invention; instead of whole embodiment; based on embodiments of the invention; those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
In this article, relational language, such as first and second, top and bottom etc., can be used for an entity and another entity or action to distinguish, and not inevitable requirement or adopt entity or action between this type of relation or the order of any reality.Term " comprises ", " comprising " or other any variants, be intended to contain and exclusively have, comprise that technique, method, article or the device of enumerating element not only comprise element for one time, but also can comprise other do not express list or process, method, object product or the intrinsic element of device.By " comprising ... " the element guiding, not more multiple constraint in the situation that, and is not precluded within process, method, article or the device that comprises element and has extra similar elements.
As shown in Figure 1, control method to DC/DC under a kind of mode of operation, comprise the steps: S101: in the situation that battery management system enters mode of operation, check that whether the low potential source of electronlmobil is lower than the first standard value, if just control DC/DC relay closes and send instruction, just controlling if not DC/DC relay is off-state; S102: judge that whether the low potential source of electronlmobil is higher than the second standard value, if it is physique order, to DC/DC relay, is charged to low potential source with regard to continuing if not; S103: judge whether electric automobile high-voltage powers on, if it is continue to judge S101, if otherwise DC/DC relay quit work, till knowing and again going up high pressure.
In a preferred embodiment, the first standard value V
1for V
cC* Q
1q
2/ (Q-
1+ Q
2), wherein Q
1for minimum charge value, Q
2for the highest charge value, the second standard value V
2for V
cC* (Q
1+ Q
2)/Q
1q
2, wherein Q
1for minimum charge value, Q
2for the highest charge value, as further technical scheme, the minimum working power of low potential source is corresponding rating horsepower 2V
cC 2/ (Q
1+ Q
2).
In the time of work, if in the time that the electric weight of electronlmobil low potential source is very low, just likely occur that entire car controller work occurs abnormal, battery management system also has other equipment that need to use low potential source all likely to work appearance extremely, this just requires power voltage supply power supply at electronlmobil when comparision of quantity of electricity is low, to its charging.
Electric weight to electronlmobil low potential source judges, is less than certain electric weight V when BMS detects electronlmobil voltage source
cC* Q
1q
2/ (Q-
1+ Q
2) time, to control DC/DC relay closes and send work order to DC/DC controller, electric automobile high-voltage part battery comes to voltage source power supply, thereby charges to the power voltage supply power supply of electronlmobil.In the time that the electric weight of electronlmobil power voltage supply power supply reaches certain value, BMS sends and ceases and desist order to after DC/DC controller, and the short DC/DC relay of opening.If when the electric weight of the low-voltage power supply of electronlmobil is lower than V
cC* (Q
1+ Q
2)/Q
1q
2time, BMS can control DC/DC relay closes again, and send work order to DC/DC controller. so under state, carry out cycling. not only can increase the safety of battery-driven car with above-mentioned this control policy, can also increase the travelled distance of battery-driven car, avoid battery-driven car one work, DC/DC relay is work just, until battery-driven car is not worked, the electric weight that consumes like this high tension battery is just many, can sacrifice certain travelled distance.
Above embodiment has only expressed preferred embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (4)
1. the control method to DC/DC under mode of operation, is characterized in that comprising the steps:
S101: in the situation that battery management system enters mode of operation, check that whether the low potential source of electronlmobil is lower than the first standard value, if just control DC/DC relay closes and send instruction, just controlling if not DC/DC relay is off-state;
S102: judge that whether the low potential source of electronlmobil is higher than the second standard value, if it is physique order, to DC/DC relay, is charged to low potential source with regard to continuing if not;
S103: judge whether electric automobile high-voltage powers on, if it is continue to judge S101, if otherwise DC/DC relay quit work, till knowing and again going up high pressure.
2. the control method to DC/DC under a kind of mode of operation as claimed in claim 1, is characterized in that, described the first standard value V
1for V
cC* Q
1q
2/ (Q
-1+ Q
2), wherein said Q
1for minimum charge value, Q
2for the highest charge value.
3. the control method to DC/DC under a kind of mode of operation as claimed in claim 1, is characterized in that, described the second standard value V
2for V
cC* (Q
1+ Q
2)/Q
1q
2,wherein said Q
1for minimum charge value, Q
2for the highest charge value.
4. the control method to DC/DC under a kind of mode of operation as claimed in claim 1, is characterized in that, the minimum working power of described low potential source is corresponding rating horsepower 2V
cC 2/ (Q
1+ Q
2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310715300.3A CN103832290A (en) | 2013-12-23 | 2013-12-23 | DC/DC control method in working mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310715300.3A CN103832290A (en) | 2013-12-23 | 2013-12-23 | DC/DC control method in working mode |
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| Publication Number | Publication Date |
|---|---|
| CN103832290A true CN103832290A (en) | 2014-06-04 |
Family
ID=50796300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310715300.3A Pending CN103832290A (en) | 2013-12-23 | 2013-12-23 | DC/DC control method in working mode |
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| Country | Link |
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| CN (1) | CN103832290A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106042964A (en) * | 2016-06-27 | 2016-10-26 | 北京新能源汽车股份有限公司 | Electric automobile low-voltage storage battery control method and device and electric automobile |
| CN106427581A (en) * | 2016-08-30 | 2017-02-22 | 东风柳州汽车有限公司 | Charging control method for low-voltage accumulator of electric automobile |
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| CN101604855A (en) * | 2009-05-08 | 2009-12-16 | 奇瑞汽车股份有限公司 | A kind of pure electric automobile DC-DC converter enable control method |
| CN101624021A (en) * | 2009-08-03 | 2010-01-13 | 奇瑞汽车股份有限公司 | 12V storage battery working system of pure electric vehicle and management method |
| CN101966841A (en) * | 2010-08-09 | 2011-02-09 | 奇瑞汽车股份有限公司 | DC/DC conversion system of electric vehicle and control method thereof |
| WO2012063331A1 (en) * | 2010-11-10 | 2012-05-18 | トヨタ自動車株式会社 | Electric vehicle power supply system, control method thereof, and electric vehicle |
| CN102490622A (en) * | 2011-12-19 | 2012-06-13 | 青岛威能电动车辆电控有限公司 | Power supply control method for auxiliary system of electric automobile |
-
2013
- 2013-12-23 CN CN201310715300.3A patent/CN103832290A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101604855A (en) * | 2009-05-08 | 2009-12-16 | 奇瑞汽车股份有限公司 | A kind of pure electric automobile DC-DC converter enable control method |
| CN101624021A (en) * | 2009-08-03 | 2010-01-13 | 奇瑞汽车股份有限公司 | 12V storage battery working system of pure electric vehicle and management method |
| CN101966841A (en) * | 2010-08-09 | 2011-02-09 | 奇瑞汽车股份有限公司 | DC/DC conversion system of electric vehicle and control method thereof |
| WO2012063331A1 (en) * | 2010-11-10 | 2012-05-18 | トヨタ自動車株式会社 | Electric vehicle power supply system, control method thereof, and electric vehicle |
| CN102490622A (en) * | 2011-12-19 | 2012-06-13 | 青岛威能电动车辆电控有限公司 | Power supply control method for auxiliary system of electric automobile |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106042964A (en) * | 2016-06-27 | 2016-10-26 | 北京新能源汽车股份有限公司 | Electric automobile low-voltage storage battery control method and device and electric automobile |
| CN106427581A (en) * | 2016-08-30 | 2017-02-22 | 东风柳州汽车有限公司 | Charging control method for low-voltage accumulator of electric automobile |
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| PB01 | Publication | ||
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Application publication date: 20140604 |