CN103986209A - Automotive storage battery charging system and method - Google Patents
Automotive storage battery charging system and method Download PDFInfo
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- CN103986209A CN103986209A CN201410225942.XA CN201410225942A CN103986209A CN 103986209 A CN103986209 A CN 103986209A CN 201410225942 A CN201410225942 A CN 201410225942A CN 103986209 A CN103986209 A CN 103986209A
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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
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Abstract
The invention provides an automotive storage battery charging system and method, and belongs to the technical field of batteries. The automotive storage battery charging system comprises a whole automobile control unit, a self-retaining circuit and a remote control unit. The whole automobile control unit collects state signals of a starting switch, detects the first electric quantity of a storage battery after collecting the signal representing that the starting switch is turned off, calculates the standing time of a whole automobile according to the first electric quantity, and then sends a power-off request signal to the self-retaining circuit. The self-retaining circuit controls the whole automobile to be powered off after receiving the power-off request signal. The remote control unit conducts timekeeping on the power-off time of the whole automobile and sends an awakening signal to the self-retaining circuit after the power-off time of the whole automobile reaches the standing time of the whole automobile. The self-retaining circuit awakens the whole automobile control unit after receiving the awakening signal. The whole automobile control unit starts to detect the second electric quantity of the storage battery after being awakened, calculates the estimated charging time according to the second electric quantity, and then charges the storage battery according to the estimated charging time. The automotive storage battery charging system and method are low in energy consumption and low in cost.
Description
Technical field
The present invention relates to battery technology field, particularly a kind of car battery charging system and method.
Background technology
Along with developing rapidly of new-energy automobile industry, hybrid vehicle and electric automobile have obtained application more and more frequently.Just will inevitably there is a problem identical with traditional fuel vehicle in this: vehicle is in long-time standing situation, and the 12V accumulator feeding on car, causes vehicle normally not start.In order to prevent discharged or defective battery, affect car load and start, occurred the car battery charging system that can automatically charge to storage battery.
As shown in Figure 1, be the structured flowchart of car battery charging system of the prior art.This battery charging system generally includes: high-tension battery 1, DC-to-DC converter 2, storage battery 3, control circuit 4 and starting switch 5.Wherein, one end of DC-to-DC converter 2 is connected with high-tension battery 1, and the other end is connected with storage battery 3, and control circuit 4 two ends are connected with starting switch 5 with DC-to-DC converter 2 respectively.The output voltage of high-tension battery 1 is generally 380V, 12V direct voltage accumulators 3 chargings that the 380V direct voltage of high-tension battery 1 output can be converted to by DC-to-DC converter 2.
The operation principle of this car battery charging system is as follows: when starting switch 5 is set to ON state, while turning automobile key to ON shelves, control circuit 4 sends triggering signal to DC-to-DC converter 2, DC-to-DC converter 2 is started working, by DC-to-DC converter 2, the 380V direct voltage of high-tension battery 1 output being converted to 12V direct voltage, is storage battery 3 chargings.When vehicle need to be parked for a long time, driver is screwed to OFF shelves by starting switch 5 conventionally, and now, control circuit 4 transmits control signal to DC-to-DC converter 2, and it is quit work, thereby high-tension battery 1 is stopped as storage battery 3 chargings.By after electricity under car load, storage battery 3 is not connected with charging device, and the state that is car load power supply by the existing electric weight of storage battery 3 is called vehicle static condition, and, from starting switch 5 disconnects constantly, vehicle starts to enter static condition.At vehicle in static condition situation, control circuit 4 continues to detect the voltage of storage battery 3, when the voltage of storage battery 3 is for example, during lower than set point (10.5V), control circuit 4 will send triggering signal to DC-to-DC converter 2 starts working it, thereby charges for storage battery 3 by high-tension battery 1.
Car battery charging system of the prior art, although can be charge in batteries automatically, because needs increase special control circuit, causes manufacturing cost higher; And at vehicle, under static condition, control circuit need to continue to detect the voltage of storage battery, causes energy consumption higher.
Summary of the invention
The object of the embodiment of the present invention is to provide a kind of car battery charging system and method, and energy consumption is little, and cost is low.
The technical scheme that the embodiment of the present invention provides is as follows:
On the one hand, a kind of car battery charging system is provided, comprise: high-tension battery, DC-to-DC converter, storage battery and starting switch, described DC-to-DC converter is connected between described high-tension battery and described storage battery, also comprise: be connected to the car load control unit between described DC-to-DC converter and starting switch, and the remote control unit being connected with described storage battery, between described remote control unit and described entire car controller, be connected with self-hold circuit;
Described car load control unit, be used for gathering starting switch status signal, and after collecting described starting switch cut-off signal, start to detect the first electric weight of storage battery, and according to described the first electric weight, calculate car load can time of repose, then to described self-hold circuit, send request the lower signal of telecommunication;
Described self-hold circuit, for receiving under described request after the signal of telecommunication, controls electricity under car load;
Described remote control unit, for electricity under car load is carried out to timing the time, and under described car load the electricity time reach described car load can time of repose after, to described self-hold circuit, send wake-up signal;
Described self-hold circuit, also for after receiving described wake-up signal, wakes described car load control unit up;
Described car load control unit, also for start to detect the second electric weight of described storage battery after being waken up, and calculates and estimates the charging interval according to described the second electric weight, then according to the described expectation charging interval, described storage battery is charged.
Preferably, also comprise: be connected to the high-voltage relay between described high-tension battery and described DC-to-DC converter; Described high-voltage relay is also connected with described self-hold circuit by described car load control unit, described high-voltage relay is controlled under car load after electricity in described self-hold circuit, cut off being connected between described high-tension battery and described DC-to-DC converter, stop described charge in batteries.
Preferably, describedly according to described the first electric weight, calculate car load and can comprise by time of repose: according to described the first electric weight, calculate the SOC of described storage battery, then according to described SOC, calculating described car load can time of repose.
Preferably, describedly according to described the second electric weight, calculate to estimate that the charging interval comprises: according to described the second electric weight, calculate the SOC of described storage battery, then according to described SOC, calculate the described expectation charging interval.
On the other hand, provide a kind of car battery charging method, comprising:
Gather starting switch status signal;
If collect described starting switch cut-off signal, start to detect the first electric weight of storage battery, and according to described the first electric weight, calculate car load can time of repose, then to self-hold circuit, send request the lower signal of telecommunication;
Described self-hold circuit is receiving under described request after the signal of telecommunication, controls electricity under car load;
Electricity under car load is carried out to timing the time, and under described car load the electricity time reach described car load can time of repose after, start to detect the second electric weight of described storage battery, and calculate and estimate the charging interval according to described the second electric weight, then according to the described expectation charging interval, described storage battery is charged.
Preferably, under described car load the electricity time reach described car load can time of repose after, also comprise: to described self-hold circuit, send wake-up signal, described self-hold circuit is after receiving described wake-up signal, wake car load control unit up, so that described car load control unit carries out the detection of storage battery the second electric weight, and estimate charging interval calculating.
Preferably, describedly according to described the first electric weight, calculate car load and can comprise by time of repose: according to described the first electric weight, calculate the SOC of described storage battery, and according to described SOC, calculate described car load can time of repose.
Preferably, describedly according to described the second electric weight, calculate to estimate that the charging interval comprises: according to described the second electric weight, calculate the SOC of described storage battery, and calculate the described expectation charging interval according to described SOC.
Car battery charging system and method that the embodiment of the present invention provides, after starting switch cut-off signal being detected, do not control at once electricity under car load, but the lower electric delay time will be set, within this time of delay, by detecting accumulator electric-quantity, calculate car load and can after time of repose, just control electricity under car load, under car load the electricity time reach car load can time of repose after, again detect accumulator electric-quantity, calculate to estimate the charging interval, and storage battery is charged according to this expectation charging interval.This car battery charging system and method, only need to be after starting switch cut-off signal being detected and under car load the electricity time reach the electric weight that car load just detects storage battery after can time of repose, and do not need constantly to detect the information about power of storage battery, energy consumption is less, do not need additionally to increase control circuit, can effectively reduce costs.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment be briefly described below, apparently, the accompanying drawing the following describes is only some embodiment that record in the present invention, for those of ordinary skills, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of car battery charging system of the prior art;
Fig. 2 is the structural representation of a kind of car battery charging system of providing of the embodiment of the present invention;
Fig. 3 is the SOC of storage battery and the car load graph of relation between can time of repose;
Fig. 4 is the SOC of storage battery and estimates the graph of relation between the charging interval;
Fig. 5 is the flow chart of a kind of car battery charging method of providing of the embodiment of the present invention.
Reference numeral:
1 high-tension battery; 2 DC-to-DC converter; 3 storage batterys; 4 control circuits;
5 starting switches; 6 car load control units; 7 remote control units;
8 high-voltage relays; 9 self-hold circuits.
Embodiment
In order to make those skilled in the art person understand better the scheme of the embodiment of the present invention, below in conjunction with drawings and embodiments, the embodiment of the present invention is described in further detail.
As shown in Figure 2, the structural representation of a kind of car battery charging system providing for the embodiment of the present invention, can comprise high-tension battery 1, DC-to-DC converter 2, storage battery 3 and starting switch 5, wherein, DC-to-DC converter 2 can be connected between high-tension battery 1 and storage battery 3, this car battery charging system can also comprise: be connected to car load control unit (the Vehicle Control Unit between DC-to-DC converter 2 and starting switch 5, be called for short VCU) 6, and the remote control unit 7 being connected with storage battery 3 (the English T-BOX that is called for short), between remote control unit 7 and entire car controller 6, can also be connected with self-hold circuit 9.Car load control unit 6 can gather starting switch status signal, and after collecting starting switch 5 cut-off signals, start to detect the first electric weight of storage battery 3, and according to the first electric weight, calculate car load can time of repose, then to self-hold circuit 9, send request the lower signal of telecommunication; Self-hold circuit 9 can receive under request after the signal of telecommunication, controls electricity under car load; Remote control unit 7 can carry out timing to electricity under car load the time, and under car load the electricity time reach car load can time of repose after, to self-hold circuit 9, send wake-up signals; Self-hold circuit 9 can also, after receiving wake-up signal, be waken car load control unit 6 up; Car load control unit 6 can start to detect the second electric weight of storage battery 3 after being waken up, and calculates and estimate the charging interval according to the second electric weight, and then the charging interval charges to storage battery 3 according to expectation.
The status signal of above-mentioned starting switch can comprise closure state and off-state.Car load control unit collects after starting switch cut-off signal, can not control at once electricity under car load, but is set certain lower electric delay time, car load control unit detects the first electric weight of storage battery and calculates car load within this time of delay can time of repose, then just to self-hold circuit, send lower electric request signal, self-hold circuit is controlled electricity under car load after receiving lower electric request signal.Under car load, after electricity, DC-to-DC converter will quit work, thereby make high-tension battery no longer to charge in batteries.Wherein, self-hold circuit specifically can adopt implementation the most conventional in prior art, for example, adopts one or more relays to be connected and is realized, and repeats no more herein.
Car load control unit, after detecting the first electric weight of storage battery, can first be calculated the SOC (state-of-charge, State Of Charge) of storage battery according to this first voltameter, and then according to SOC, calculate car load can time of repose.Wherein, car load can refer to by time of repose, and under car load, after electricity, storage battery is not connected with charging device, with storage battery have electric weight can not there is not complete feed and can guarantee car load normally start the lasting time of energy.
In embodiments of the present invention, the SOC computational methods of storage battery can be:
SOC
0for the SOC value of initial calculation, this value can be estimated according to the initial voltage value that powers on, and sCnom is ampere-hour integration modifying factor, and Ibat is battery discharging electric current, SOC
tfor battery temp modifying factor, SOC
efor ambient condition modifying factor.
In embodiments of the present invention, car load control unit detects after first electric weight or the second electric weight of storage battery, can calculate by above-mentioned formula the SOC of storage battery.
As shown in Figure 3, be the SOC of storage battery and the car load graph of relation between can time of repose.
Car load control unit can be according to the storage battery SOC calculating and car load the functional relation between can time of repose, calculating car load can time of repose T
1:
T
1＝f(SOC,Ibat,Vbat)+f(Iveh,Vveh)
Wherein, T
1can time of repose for car load, f is correspondence rule, and Ibat is battery current, and Vbat is battery tension, and Iveh is the electric current in circuit, Vveh is the voltage at circuit two ends.
As shown in Figure 4, for the SOC of storage battery and estimate the graph of relation between the charging interval.
Car load control unit can and be estimated the functional relation between the charging interval according to the storage battery SOC calculating, and calculates and estimates charging interval T
2:
T
2＝f(SOC,Ibat,Vbat)
Wherein, T
2can time of repose for car load, f is correspondence rule, and Ibat is battery current, and Vbat is battery tension.
In embodiments of the present invention, can also comprise: be connected to the high-voltage relay 8 between high-tension battery 1 and DC-to-DC converter 2, wherein, high-voltage relay 8 can also be connected with self-hold circuit 9 by car load control unit 6, high-voltage relay 8 is controlled under car loads after electricity in self-hold circuit 9, can cutoff high battery 1 with DC-to-DC converter 2 between be connected, thereby stop storage battery 3 chargings.
The car battery charging system that the embodiment of the present invention provides, after starting switch cut-off signal being detected, do not control at once electricity under car load, but the lower electric delay time will be set, within this time of delay, by detecting accumulator electric-quantity, calculate car load and can after time of repose, just control electricity under car load, under car load the electricity time reach car load can time of repose after, again detect accumulator electric-quantity, calculate to estimate the charging interval, and storage battery is charged according to this expectation charging interval.This car battery charging system and method, only need to be after starting switch cut-off signal being detected and under car load the electricity time reach the electric weight that car load just detects storage battery after can time of repose, and do not need constantly to detect the information about power of storage battery, energy consumption is less, do not need additionally to increase control circuit, can effectively reduce costs.
Correspondingly, the embodiment of the present invention also provides a kind of car battery charging method, and as shown in Figure 5, this car battery charging method can comprise the following steps:
Step 101: gather starting switch status signal, and after collecting starting switch cut-off signal, start to detect the first electric weight of storage battery, and according to the first electric weight, calculate car load can time of repose, then to self-hold circuit, send request the lower signal of telecommunication;
Step 102: self-hold circuit is receiving under request after the signal of telecommunication, controls electricity under car load;
Step 103: electricity under car load is carried out to timing the time, and under car load the electricity time reach car load can time of repose after, start to detect the second electric weight of storage battery, and calculate and estimate the charging interval according to the second electric weight, then the charging interval charges to storage battery according to expectation.
Wherein, in above-mentioned steps, preferably adopt car load control unit to gather the status signal of starting switch, detect the first electric weight of storage battery, and according to detected the first electric weight, calculate car load can time of repose, and send request the lower signal of telecommunication to self-hold circuit, can to the electricity time under car load, carry out timing by remote control unit (T-BOX).Can certainly, by car load control unit, the performed action of remote control unit, by software programming, be realized.
Under car load the electricity time reach car load can time of repose after, also comprise: to self-hold circuit, send wake-up signal, self-hold circuit, after receiving wake-up signal, is waken car load control unit up, so that car load control unit carries out the detection of storage battery the second electric weight and the calculating of estimating the charging interval.
Wherein, under car load the electricity time reach car load can time of repose after, in order to prevent that storage battery from continuing feed and causing car load normally to start, need to start as charge in batteries.By detecting the second electric weight of storage battery, can calculate comparatively exactly and estimate the charging interval, after the charging interval reaches the expectation charging interval, can automatically stop charging, thereby effective energy savings prevents from continuing the contingent security incident problem of charging simultaneously.
Above-mentionedly according to the first electric weight, calculate car load and can comprise by time of repose: according to the SOC of the first electric weight calculating accumulator, and according to SOC, calculate car load can time of repose.
Above-mentionedly according to the second electric weight, calculate to estimate that the charging interval can comprise: according to the SOC of the second electric weight calculating accumulator, and calculate and estimate the charging interval according to SOC.
Wherein, the SOC of storage battery, car load are can time of repose identical with system embodiment with computational methods and the formula of estimating the charging interval, repeat no more herein.
The car battery charging method that the embodiment of the present invention provides, after starting switch cut-off signal being detected, do not control at once electricity under car load, but the lower electric delay time will be set, within this time of delay, by detecting accumulator electric-quantity, calculate car load and can after time of repose, just control electricity under car load, under car load the electricity time reach car load can time of repose after, again detect accumulator electric-quantity, calculate to estimate the charging interval, and storage battery is charged according to this expectation charging interval.This car battery charging system and method, only need to be after starting switch cut-off signal being detected and under car load the electricity time reach the electric weight that car load just detects storage battery after can time of repose, and do not need constantly to detect the information about power of storage battery, energy consumption is less, do not need additionally to increase control circuit, can effectively reduce costs.
Each embodiment in this specification all adopts the mode of going forward one by one to describe, between each embodiment identical similar part mutually referring to, each embodiment stresses is the difference with other embodiment.Especially, for embodiment of the method, because it is substantially similar in appearance to system embodiment, so describe fairly simplely, relevant part is referring to the part explanation of system embodiment.Wherein, the annexation of each circuit element as executive agent relating in embodiment of the method; be not limited to the physical circuit connection that system embodiment schematically provides, no matter adopt which kind of circuit connecting mode, as long as can realize corresponding function, all fall into protection scope of the present invention.System embodiment described above is only schematic, the wherein said unit as separating component explanation can or can not be also physically to separate, the parts that show as unit can be or can not be also physical locations, can be positioned at a place, or also can be distributed in a plurality of network element.Can select according to the actual needs some or all of module wherein to realize the object of the present embodiment scheme.Those of ordinary skills, in the situation that not paying creative work, are appreciated that and implement.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (8)
1. a car battery charging system, comprise high-tension battery, DC-to-DC converter, storage battery and starting switch, described DC-to-DC converter is connected between described high-tension battery and described storage battery, it is characterized in that, also comprise: be connected to the car load control unit between described DC-to-DC converter and starting switch, and the remote control unit being connected with described storage battery, between described remote control unit and described entire car controller, be connected with self-hold circuit;
Described car load control unit, be used for gathering starting switch status signal, and after collecting described starting switch cut-off signal, start to detect the first electric weight of storage battery, and according to described the first electric weight, calculate car load can time of repose, then to described self-hold circuit, send request the lower signal of telecommunication;
Described self-hold circuit, for receiving under described request after the signal of telecommunication, controls electricity under car load;
Described remote control unit, for electricity under car load is carried out to timing the time, and under described car load the electricity time reach described car load can time of repose after, to described self-hold circuit, send wake-up signal;
Described self-hold circuit, also for after receiving described wake-up signal, wakes described car load control unit up;
Described car load control unit, also for start to detect the second electric weight of described storage battery after being waken up, and calculates and estimates the charging interval according to described the second electric weight, then according to the described expectation charging interval, described storage battery is charged.
2. car battery charging system according to claim 1, is characterized in that, also comprises: be connected to the high-voltage relay between described high-tension battery and described DC-to-DC converter; Described high-voltage relay is also connected with described self-hold circuit by described car load control unit, described high-voltage relay is controlled under car load after electricity in described self-hold circuit, cut off being connected between described high-tension battery and described DC-to-DC converter, stop described charge in batteries.
3. according to the car battery charging system described in claim 1 or 2 any one, it is characterized in that, describedly according to described the first electric weight, calculate car load and can comprise by time of repose: according to described the first electric weight, calculate the SOC of described storage battery, then according to described SOC, calculating described car load can time of repose.
4. according to the car battery charging system described in claim 1 or 2 any one, it is characterized in that, describedly according to described the second electric weight, calculate to estimate that the charging interval comprises: according to described the second electric weight, calculate the SOC of described storage battery, then according to described SOC, calculate the described expectation charging interval.
5. a car battery charging method, is characterized in that, comprising:
Gather starting switch status signal;
If collect described starting switch cut-off signal, start to detect the first electric weight of storage battery, and according to described the first electric weight, calculate car load can time of repose, then to self-hold circuit, send request the lower signal of telecommunication;
Described self-hold circuit is receiving under described request after the signal of telecommunication, controls electricity under car load;
Electricity under car load is carried out to timing the time, and under described car load the electricity time reach described car load can time of repose after, start to detect the second electric weight of described storage battery, and calculate and estimate the charging interval according to described the second electric weight, then according to the described expectation charging interval, described storage battery is charged.
6. car battery charging method according to claim 5, it is characterized in that, under described car load the electricity time reach described car load can time of repose after, also comprise: to described self-hold circuit, send wake-up signal, described self-hold circuit is after receiving described wake-up signal, wake car load control unit up, so that described car load control unit carries out the detection of storage battery the second electric weight, and estimate charging interval calculating.
7. according to the car battery charging method described in claim 5 or 6 any one, it is characterized in that: describedly according to described the first electric weight, calculate car load and can comprise by time of repose: according to described the first electric weight, calculate the SOC of described storage battery, and according to described SOC, calculate described car load can time of repose.
8. according to the car battery charging method described in claim 5 or 6 any one, it is characterized in that, describedly according to described the second electric weight, calculate to estimate that the charging interval comprises: according to described the second electric weight, calculate the SOC of described storage battery, and calculate the described expectation charging interval according to described SOC.
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Address after: 230601 Anhui Province, Hefei City Industrial Park, the Peach Blossom Road No. 669 Patentee after: Anhui Jianghuai Automobile Group Limited by Share Ltd Address before: 230601 Anhui Province, Hefei City Industrial Park, the Peach Blossom Road No. 669 Patentee before: Anhui Jianghuai Automotive Co., Ltd. |