CN101740829A - Electrical bicycle charging method - Google Patents
Electrical bicycle charging method Download PDFInfo
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- CN101740829A CN101740829A CN200810217691A CN200810217691A CN101740829A CN 101740829 A CN101740829 A CN 101740829A CN 200810217691 A CN200810217691 A CN 200810217691A CN 200810217691 A CN200810217691 A CN 200810217691A CN 101740829 A CN101740829 A CN 101740829A
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention provides an electrical bicycle charging method. In the method, a charging system comprises a battery unit charger, a dynamic battery unit, a DC (direct current)/DC converter, a starting battery, and a battery manager, wherein the battery unit charger, the dynamic battery unit, the DC/DC converter and the starting battery are sequentially connected; the battery manager is connected with the DC/DC converter and the dynamic battery unit. The method comprises the following steps that: when the dynamic battery unit is charged, the battery manager judges whether the voltage of the starting battery achieves low-point threshold voltage or not; if so, the battery manager does not start the DC/DC converter; if not, the battery manager starts the DC/DC converter to charge the starting battery.
Description
Technical field
The present invention relates to field of automobile, particularly a kind of electrical bicycle charging method.
Background technology
Along with the anxiety of the energy and increasingly sharpening of environmental pollution, make the orthodox car industry development be faced with numerous difficulties, so electric automobile appear as vast automobile production manufacturer and the consumer has an optimistic view of, become the focus of development of automobile.Electric automobile is meant with the electric energy to be the automobile of major impetus, generally adopts the high efficiency rechargeable battery as power source.Therefore the charging system that rechargeable battery is charged just becomes the indispensable and part and parcel very of electric motor car.
As shown in Figure 1, structural representation for charging system of electric powercar in the prior art, charging system of electric powercar of the prior art generally comprises power battery pack 110, battery manager 120, group charger 130, starts the cooling system 160 of battery 140, DC/DC converter 150 and DC/DC converter 150, and some other necessary electrical appliances.Power battery pack 110 provides power for electric motor car; Group charger 130 charges into power battery pack 110 with external electric energy; Battery manager 120 is used to monitor the state of power battery pack 110, charging process managed, and monitoring power battery pack voltage, electric current, states such as temperature, and the relay in the control battery set charge/discharge loop, these relays are the parts that constitute charging system necessity; Start battery 140 and be used for electric power supply that battery manager and other charging processes are worked; Charge into after DC/DC converter 150 is changed the battery pack electric energy and start battery 140 to keep starting the electric weight of battery 140.
Because the design power of DC/DC converter 150 is big to satisfy the need for electricity of vehicle ' process mesolow electrical equipment usually, and is still very little at the load of charging process mesolow electrical equipment, so DC/DC converter 150 is in inefficient service area.In addition because DC/DC converter 150 also can be furnished with corresponding cooling system 160 usually; if cooling system 160 is also worked then will be brought more loss when charging like this; thereby reduced the efficient (the actual electric weight of battery and the ratio of charger input front end input electric weight of charging into) of whole charging system; when particularly adopting the small-power charger; unnecessary system loss meeting produces bigger influence to the charge efficiency of whole charging system; thereby prolonged the charging interval, increased user's use cost.
For the defective to above-mentioned prior art has clearer understanding, the present invention is described with the example of concrete charging system, in this example, can relate to the concrete parameter of some modules, but need to prove that these concrete parameters only are in order to make this example clearer, but be not that the present invention only is suitable for following these parameters.The parameters such as power consumption of supposing charging system of electric powercar medium power battery pack 110, battery manager 120, group charger 130, startup battery 140, DC/DC converter 150 and cooling system 160 are as follows:
150 inputs of DC/DC converter connect power battery pack, and output connects the startup battery, and rated power is 1000W, and fully loaded operating efficiency is 90%, yet operating efficiency can be low to moderate 60% usually when 10% following load.
The cooling system 160 of DC/DC converter 150 can be water-cooling heat radiating system, and main electrical appliance is a water pump, because this cooling system is used for the heat radiation of converters such as electric machine controller simultaneously, so its rated disspation is usually about 1000W.
Start battery 140 and can be common 60AH lead-acid battery, full piezoelectric voltage is about 14V, and feed voltage is about 10V.
The power consumption of battery manager 120 is usually below 20W.
When output current was 5A when group charger is fully loaded with work, the charger power output was P2=330V*5A=1650W, and the charger input power is P1=P2/0.85=1941W.Owing to the work of water pump, battery manager 120 and other electrical appliance, power consumption is about P3=P4+P5=100W+20W=120W in startup battery 140 supply lines.Because DC/DC converter 150 operating efficiency when 10% following load can be low to moderate 60% usually, and in order to keep the electric weight that starts battery 140, so DC/DC converter 150 can be from the electric weight of power battery pack 110 consumption P6=P3/0.60=200W.
Like this, the actual power that charges into power battery pack is P7=P2-P6=1650W-200W=1450W, and the efficient of whole charging system is P7/P1*100%=1450/1941=74.7%, than group charger efficient 85% bigger decline has been arranged.
Summary of the invention
Purpose of the present invention is intended to solve at least one of above-mentioned technological deficiency, particularly solves not high and the long and high defective of customer using cost of charging interval that cause of charge efficiency in the prior art.
For achieving the above object, one aspect of the present invention proposes a kind of electrical bicycle charging method, charging system comprises group charger, power battery pack, DC/DC converter, start battery and the battery manager that links to each other with described power battery pack with described DC/DC converter, may further comprise the steps: when power battery pack was charged, battery manager judged whether start cell voltage reaches the low spot threshold voltage; If described battery manager judges that starting cell voltage has reached the low spot threshold voltage, then described battery manager does not start the DC/DC converter, described battery manager continues described startup cell voltage is monitored, when the voltage of described startup battery was lower than described low spot threshold voltage, described battery manager started the DC/DC converter described startup battery is charged; If described battery manager judges that starting cell voltage does not reach the low spot threshold voltage, then described battery manager starts the DC/DC converter described startup battery is charged, the output current that detects described DC/DC converter when described battery manager is less than given current value, and then described battery manager is closed described DC/DC converter.
The present invention carries out ACTIVE CONTROL by battery manager to the DC/DC converter, just start the DC/DC converter when being necessary, and being arranged so that after the DC/DC converter starts of passing threshold voltage can enter the high efficiency dotted state, can provide charge efficiency effectively thereby in the whole long charging interval, be in the low efficiency point state always, reduce customer using cost with respect to prior art.
Aspect that the present invention adds and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage are from obviously and easily understanding becoming the description of embodiment below in conjunction with accompanying drawing, wherein:
Fig. 1 is the structural representation of charging system of electric powercar in the prior art;
Fig. 2 is the flow chart of embodiment of the invention electrical bicycle charging method; And
Fig. 3 is an embodiment of the invention charging system of electric powercar structure chart.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Below by the embodiment that is described with reference to the drawings is exemplary, only is used to explain the present invention, and can not be interpreted as limitation of the present invention.
The present invention mainly is, by battery manager the DC/DC converter is carried out ACTIVE CONTROL, when the electric motor car parking is charged to power battery pack, judges whether charged battery voltage is lower than the low spot threshold voltage.If charged battery voltage is lower than the low spot threshold voltage, then open of the charging of DC/DC converter to rechargeable battery, if battery manager detects the output current of described DC/DC converter less than given current value, then described battery manager is closed described DC/DC converter.Further, because electrokinetic cell pool-size and startup battery capacity are inequality, the charging interval of electrokinetic cell pool-size may be less than starting the maintainable power-on time of battery, so in one embodiment of the invention, because the DC/DC converter is in running order always before the electric motor car stopping for charging, start battery and should be in full power state, can be maintained to the power battery pack charging and finish, therefore between this embodiment is to the charge period of electrokinetic cell, can not monitor starting battery.
Yet for another kind of situation of the present invention, if the very big very long charging interval of needs of the capacity of power battery pack, and the capacity that starts battery is less relatively, can't be maintained to the power battery pack charging finishes, so also need between to the charge period of power battery pack, monitor the voltage that starts battery, if its voltage is lower than the low spot threshold voltage, then starting the DC/DC converter charges, lower owing to starting cell voltage this moment in addition, therefore this moment, the DC/DC converter was in the higher working point of load, can further improve charge efficiency; If battery manager detects the output current of described DC/DC converter less than given current value, then start battery and be full of, be in full power state, then close the DC/DC converter.Certainly also exist the power battery pack charging interval to be far longer than and start the scene that battery is held time, similar to the above embodiments to the monitoring that starts battery in this scene, do not repeat them here.
As shown in Figure 2, flow chart for embodiment of the invention electrical bicycle charging method, wherein charging system comprises group charger, power battery pack, the DC/DC converter that connects successively and starts battery, and with described DC/DC converter and the battery manager that described power battery pack links to each other, may further comprise the steps:
Step S201, electric motor car stops, and electric motor car is charged.
Step S202, battery manager judges whether start cell voltage reaches the low spot threshold voltage, wherein, and as one embodiment of the present of invention, the DC/DC converter is connected with the startup battery is parallel, is detected the voltage that starts battery and is sent to described battery manager by the DC/DC converter.
Step S203, if battery manager judges that starting cell voltage has reached the low spot threshold voltage, then battery manager does not start the DC/DC converter, need not to charge to starting battery.In one embodiment of the invention, when the DC/DC converter cut out, the cooling system of DC/DC converter also correspondence was closed.
Step S204, after battery manager did not start the DC/DC converter, battery manager also needed to continue to monitor starting cell voltage, when the voltage that starts battery is lower than the low spot threshold voltage, started the DC/DC converter and charged to starting battery.And this moment, the DC/DC converter was in the higher working point of load, and charge efficiency is higher.
Step S205, if battery manager judges that starting cell voltage does not reach the low spot threshold voltage, then battery manager startup DC/DC converter charges to starting battery.
Step S206, after step S204 and step S205, battery manager also will be monitored the DC/DC converter situation that starts battery charge is monitored, the output current that detects described DC/DC converter when described battery manager is less than given current value, and then described battery manager is closed described DC/DC converter.
For step S206, furthermore, after the output current of described DC/DC converter is less than given current value a period of time T, close described DC/DC converter again, a period of time T is between 30 seconds to 90 seconds, be preferably 60 seconds, frequent starting stops the DC/DC converter DC/DC converter is damaged to avoid sample circuit to break down.
Further, in the above-mentioned steps and described low spot threshold voltage be preferably 2/3rds of magnitude of voltage when starting the battery full power state.
In addition, when described battery manager detects fault-signal, for example when battery voltage sampling, current sample disabler, control described DC/DC converter and be in starting state.
As shown in Figure 3, be embodiment of the invention charging system of electric powercar structure chart, startup battery 340 that this system comprises group charger 310, the power battery pack 320 that links to each other with group charger 310, the DC/DC converter 330 that links to each other with power battery pack 320, link to each other with DC/DC converter 330 and the battery manager 350 that links to each other with power battery pack 320 with DC/DC converter 330; Group charger 310 is used for linking to each other to power battery pack 320 chargings with external power source; Power battery pack 320 is used for storage of electrical energy and is the electric motor car power supply; DC/DC converter 330 is used for and will charges into rechargeable battery 340 after the conversion of the electric energy of power battery pack 320; Rechargeable battery 340 is used to battery manager 350 and the power supply of other low-voltage electrical apparatuses; Battery manager 350 is used for the charging of power battery pack 320 is managed, and to power battery pack 320 chargings the time, judge whether the voltage that starts battery 340 reaches the low spot threshold voltage, reached the low spot threshold voltage if judge the voltage that starts battery 340, then not starting 330 pairs of startups of DC/DC converter battery 340 charges, if judge not reach the low spot threshold voltage, then start 330 pairs of startups of DC/DC converter battery 340 and charge.
As one embodiment of the present of invention, battery manager 350 also is used between to power battery pack 320 charge period the voltage that starts battery 340 being monitored, be lower than the low spot threshold voltage if start the voltage of battery 340, then start 330 pairs of startups of DC/DC converter battery 340 and charge.
As one embodiment of the present of invention, battery manager 350 also is used for starting battery 340 in 330 pairs in startup DC/DC converter to carry out between charge period, current value to DC/DC converter 330 is monitored, the output current that detects described DC/DC converter when described battery manager is less than given current value, and then described battery manager is closed described DC/DC converter.
As one embodiment of the present of invention, DC/DC converter 330 and the voltage that starts battery 340 parallel joint detection startup batteries 340, battery manager 350 can obtain to start the voltage of battery 340 by DC/DC converter 330.
As one embodiment of the present of invention, above-mentioned charging system of electric powercar also is included as the cooling system 360 of DC/DC converter 330 and electric machine controller heat radiation, this cooling system 360 when DC/DC converter 330 cuts out also correspondence close.
The present invention carries out ACTIVE CONTROL by battery manager to the DC/DC converter, just start the DC/DC converter when being necessary, and being arranged so that after the DC/DC converter starts of passing threshold voltage can enter the high efficiency dotted state, can provide charge efficiency effectively thereby in the whole long charging interval, be in the low efficiency point state always, reduce customer using cost with respect to prior art.
For above-mentioned advantage of the present invention, will with the concrete parameter of concrete charging system various piece example below, with the formal proof of concrete data above-mentioned advantage of the present invention.Wherein, in order to compare, also adopt the configuration parameter identical, to prove above-mentioned advantage of the present invention with charging system in the background technology with prior art.
Scene one,
The capacity of power battery pack is less, and the required charging interval is less than starting holding time of battery.Wherein, parts total power consumption necessary in the charging system is about 20W, the load of about 2A, can keep nearly 30 hours with the startup powered battery of 60AH, power battery pack with the 100AH that mentioned in the background technology is an example, output current is 5A when supposing with the fully loaded work of the described same electrical group charger of background technology, then to the about 100AH/5A=20H consuming time of the whole charging process of power battery pack (hour), therefore in this scene, can not start the DC/DC converter.The actual like this power that charges into power battery pack is P7 '=P2-P5=1650-20W=1630W, the efficient of whole charging system is P7 '/P1*100%=1630/1941=84.0%, and the situation 74.7% of middle DC/DC converter startup work is greatly improved compared to existing technology.
Scene two,
The capacity of power battery pack is bigger, or the capacity that starts battery is less, or owing to parts power consumption increasing necessary in the charging system causes starting the maintainable power-on time shortening of battery, under this situation, can cause charging process to stop because of the low-voltage power supply feed, this moment can be by increasing starting the monitoring of cell voltage, and when the startup cell voltage drops to the low spot threshold voltage, start the DC/DC converter, when the output current of described DC/DC converter is closed the work of described DC/DC converter to reduce loss again less than given current value after a period of time.Particularly,
Suppose that the electrokinetic cell pool-size is bigger with respect to the electrokinetic cell pool-size (100AH) described in the background technology, for example be 200AH, rated voltage 330V, the startup battery capacity is 40AH, rated voltage 12V, the electrical appliance total losses 24W of charging system necessity, the group charger output current also is 5A, then the maximum charge time is 200AH/5A=40 hour, start the battery maximum hold time into 40AH/ (24W/12V)=20H (hour), loss 200W when DC/DC converter and cooling system work.
In this scene, charge charger input power consumption W1=330V*5A/0.85*40H=77.6 degree electricity, output W2=330V*5A*40H=66 degree in the mode of prior art.If DC/DC converter continuous firing in the charging process, then the power of consumption of power battery pack is 200W, and for W3=200W*40A=8 degree electricity, whole charging system efficient is (W2-W3)/W1=74.7%
If adopt charging modes of the present invention, even under the most abominable situation, promptly the DC/DC converter will start and will start battery twice and be full of in promptly 40 hours maximum charge time, about 1 degree of twice startup power consumption this moment W4=40AH*12V*2, about 1 hour of time spent 40AH*12V*2/1000W, even if water pump also with DC/DC converter startup work, increases power consumption W5=1H*200W=0.2 degree when DC/DC converter startup work.Whole charging system efficient is (W2-W4-W5)/W1=83.5% under the present invention, is greatly improved than the efficient 74.7% of prior art, and the W3-W4-W5=6.8 degree can economize on electricity.
Although illustrated and described embodiments of the invention, for the ordinary skill in the art, be appreciated that without departing from the principles and spirit of the present invention and can carry out multiple variation, modification, replacement and modification that scope of the present invention is by claims and be equal to and limit to these embodiment.
Claims (6)
1. electrical bicycle charging method, it is characterized in that, described charging system comprises successively group charger, power battery pack, the DC/DC converter that connects and starts battery, and with described DC/DC converter and the battery manager that described power battery pack links to each other, may further comprise the steps:
When power battery pack was charged, battery manager judged whether start cell voltage reaches the low spot threshold voltage;
If described battery manager judges that starting cell voltage has reached the low spot threshold voltage, then described battery manager does not start the DC/DC converter, described battery manager continues described startup cell voltage is monitored, when the voltage of described startup battery was lower than described low spot threshold voltage, described battery manager started the DC/DC converter described startup battery is charged;
If described battery manager judges that starting cell voltage does not reach the low spot threshold voltage, then described battery manager starts the DC/DC converter described startup battery is charged, the output current that detects described DC/DC converter when described battery manager is less than given current value, and then described battery manager is closed described DC/DC converter.
2. the method for claim 1 is characterized in that, and is after described battery manager startup DC/DC converter charges to described startup battery, further comprising the steps of:
After the output current of described DC/DC converter is less than given current value a period of time T, close described DC/DC converter again.
3. method as claimed in claim 2 is characterized in that, described time T is between 30 seconds to 90 seconds.
4. method as claimed in claim 1 or 2 is characterized in that, also comprises: described DC/DC converter and described startup battery are parallel to be connected, and the voltage that will detect described startup battery sends to described battery manager.
5. the method for claim 1 is characterized in that, when described DC/DC converter cut out, the cooling system of described DC/DC converter was also correspondingly closed.
6. the method for claim 1 is characterized in that, when described battery manager detects fault-signal, controls described DC/DC converter and is in starting state.
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| CN2008102176915A CN101740829B (en) | 2008-11-27 | 2008-11-27 | Electrical bicycle charging method |
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| CN2008102176915A CN101740829B (en) | 2008-11-27 | 2008-11-27 | Electrical bicycle charging method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102420342A (en) * | 2011-11-21 | 2012-04-18 | 淄博国利新电源科技有限公司 | Pure electric vehicle power supply life-prolonging rapid charging method and control system thereof |
| CN102447270A (en) * | 2010-09-30 | 2012-05-09 | 比亚迪股份有限公司 | Solar power supply control system and control method for vehicle |
| CN104659854A (en) * | 2013-11-22 | 2015-05-27 | 北汽福田汽车股份有限公司 | Charge method and system of vehicle-mounted battery and vehicle with charge system |
| CN108597117A (en) * | 2018-04-24 | 2018-09-28 | 上海上汽安悦充电科技有限公司 | A kind of operation system of charging pile |
| WO2024065801A1 (en) * | 2022-09-30 | 2024-04-04 | 宁德时代新能源科技股份有限公司 | Charging apparatus and control method therefor, and electrical device and power supply system thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102447270A (en) * | 2010-09-30 | 2012-05-09 | 比亚迪股份有限公司 | Solar power supply control system and control method for vehicle |
| CN102447270B (en) * | 2010-09-30 | 2014-01-01 | 比亚迪股份有限公司 | Solar power supply control system and control method for vehicle |
| CN102420342A (en) * | 2011-11-21 | 2012-04-18 | 淄博国利新电源科技有限公司 | Pure electric vehicle power supply life-prolonging rapid charging method and control system thereof |
| CN104659854A (en) * | 2013-11-22 | 2015-05-27 | 北汽福田汽车股份有限公司 | Charge method and system of vehicle-mounted battery and vehicle with charge system |
| CN108597117A (en) * | 2018-04-24 | 2018-09-28 | 上海上汽安悦充电科技有限公司 | A kind of operation system of charging pile |
| WO2024065801A1 (en) * | 2022-09-30 | 2024-04-04 | 宁德时代新能源科技股份有限公司 | Charging apparatus and control method therefor, and electrical device and power supply system thereof |
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| CN101740829B (en) | 2012-12-12 |
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