CN103986209B - A kind of car battery charging system and method - Google Patents

A kind of car battery charging system and method Download PDF

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Publication number
CN103986209B
CN103986209B CN201410225942.XA CN201410225942A CN103986209B CN 103986209 B CN103986209 B CN 103986209B CN 201410225942 A CN201410225942 A CN 201410225942A CN 103986209 B CN103986209 B CN 103986209B
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electricity
car load
storage battery
time
signal
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CN201410225942.XA
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Chinese (zh)
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CN103986209A (en
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田新新
夏顺礼
沙伟
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安徽江淮汽车股份有限公司
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The present invention discloses a kind of car battery charging system and method, belongs to cell art.Car battery charging system, comprising: full-vehicle control unit, gathers starting switch status signal, after collecting starting switch disconnection, detect the first electricity of storage battery, and calculate car load according to the first electricity can time of repose, then send out the lower signal of telecommunication of request to self-hold circuit; Self-hold circuit, after the lower signal of telecommunication of the request that receives, electric under controlling car load; Remote control unit, carries out timing to the electricity time under car load, and under car load the electricity time reach car load and after time of repose, wake-up signal can be sent to self-hold circuit; Self-hold circuit, after receiving wake-up signal, wakes full-vehicle control unit up; Full-vehicle control unit, starts the second electricity detecting storage battery after being waken up, and calculates the expectation charging interval according to the second electricity, and then the charging interval charges to storage battery according to expectation.This car battery charging system and method, energy consumption is little, and cost is low.

Description

A kind of car battery charging system and method

Technical field

The present invention relates to cell art, 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 obtain to be applied more and more frequently.Just will inevitably there is a problem identical with conventional fuel oil car in this: vehicle is in long-time standing situation, and the 12V accumulator feeding on car, causes vehicle normally not start.Affect car load to prevent discharged or defective battery to start, occurring can automatically to the car battery charging system that storage battery charges.

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, and the 12V direct voltage accumulators 3 that the 380V direct voltage that high-tension battery 1 can be exported by DC-to-DC converter 2 is converted to charges.

The operation principle of this car battery charging system is as follows: when starting switch 5 is set to ON state, when namely 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, the 380V direct voltage exported by high-tension battery 1 by DC-to-DC converter 2 is converted to 12V direct voltage, for storage battery 3 charges.When vehicle needs to park for a long time, starting switch 5 is screwed to OFF shelves by driver usually, and now, control circuit 4 transmits control signal to DC-to-DC converter 2, makes it quit work, thus makes high-tension battery 1 stop charging for storage battery 3.After electricity under car load, storage battery 3 is not connected with charging device, and to have electricity by storage battery 3 be that the state that car load is powered is called vehicle static condition, then disconnect the moment from starting switch 5, vehicle starts to enter static condition.Under vehicle is in static condition situation, control circuit 4 continues the voltage detecting storage battery 3, when the voltage of storage battery 3 is lower than set point (such as 10.5V), control circuit 4 will send triggering signal to DC-to-DC converter 2 makes it start working, thus is charged for storage battery 3 by high-tension battery 1.

Car battery charging system of the prior art, although can be charge in batteries automatically, owing to needing to increase special control circuit, causes manufacturing cost higher; And under vehicle is in static condition, control circuit needs the voltage continuing to detect 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 full-vehicle control unit between described DC-to-DC converter and starting switch, and the remote control unit to be connected with described storage battery, be connected with self-hold circuit between described remote control unit and described entire car controller;

Described full-vehicle control unit, for gathering starting switch status signal, and after collecting described starting switch cut-off signal, start the first electricity detecting storage battery, and calculate car load according to described first electricity can time of repose, then send request the lower signal of telecommunication to described self-hold circuit;

Described self-hold circuit, for receiving under described request after the signal of telecommunication, electric under controlling car load;

Described remote control unit, for carrying out timing to the electricity time under car load, and under described car load the electricity time reach described car load and after time of repose, wake-up signal can be sent to described self-hold circuit;

Described self-hold circuit, also for after receiving described wake-up signal, wakes described full-vehicle control unit up;

Described full-vehicle control unit, also for starting the second electricity detecting described storage battery after being waken up, and calculating the expectation charging interval according to described second electricity, then charging to described storage battery according to the described expectation charging interval.

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 full-vehicle control unit, described high-voltage relay to control under car load after electricity in described self-hold circuit, cut off the connection between described high-tension battery and described DC-to-DC converter, stop described charge in batteries.

Preferably, described according to described first electricity calculate car load can comprise by time of repose: the SOC calculating described storage battery according to described first electricity, then calculating described car load according to described SOC can time of repose.

Preferably, described calculating according to described second electricity estimates that the charging interval comprises: the SOC calculating described storage battery according to described second electricity, then calculates the described expectation charging interval according to described SOC.

On the other hand, a kind of car battery charging method is provided, comprises:

Gather starting switch status signal;

If collect described starting switch cut-off signal, start the first electricity detecting storage battery, and calculate car load according to described first electricity can time of repose, then send request the lower signal of telecommunication to self-hold circuit;

Described self-hold circuit is receiving under described request after the signal of telecommunication, electric under controlling car load;

Timing is carried out to the electricity time under car load, and under described car load the electricity time reach described car load can after time of repose, start the second electricity detecting described storage battery, and calculate the expectation charging interval according to described second electricity, 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 after time of repose, also comprise: send wake-up signal to described self-hold circuit, described self-hold circuit is after receiving described wake-up signal, wake full-vehicle control unit up, to make described full-vehicle control unit carry out the detection of storage battery second electricity, and estimate that the charging interval calculates.

Preferably, described according to described first electricity calculate car load can comprise by time of repose: the SOC calculating described storage battery according to described first electricity, and calculate described car load according to described SOC can time of repose.

Preferably, described calculating according to described second electricity estimates that the charging interval comprises: the SOC calculating described storage battery according to described second electricity, and calculates the described expectation charging interval according to described SOC.

The car battery charging system that the embodiment of the present invention provides and method, after starting switch cut-off signal being detected, electric under not controlling car load at once, but the lower electric delay time will be set, by detecting accumulator electric-quantity within this time of delay, calculate car load can just control car load after time of repose under electric, under car load the electricity time reach car load can after time of repose, again detect accumulator electric-quantity, calculate and estimate the charging interval, and according to this expectation charging interval, storage battery is charged.This car battery charging system and method, only needing the electricity time after starting switch cut-off signal being detected and under car load to reach car load can the electricity of just detection storage battery after time of repose, and do not need the moment 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, be briefly described to the accompanying drawing used required in embodiment below, apparently, the accompanying drawing that the following describes is only some embodiments recorded in the present invention, for those of ordinary skill in the art, other accompanying drawing can also be obtained according to these accompanying drawings.

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 that the embodiment of the present invention provides;

Fig. 3 is that the SOC of storage battery and car load can graph of relation between time of repose;

Fig. 4 is the graph of relation between the SOC of storage battery and expectation charging interval;

Fig. 5 is the flow chart of a kind of car battery charging method that the embodiment of the present invention provides.

Reference numeral:

1 high-tension battery; 2 DC-to-DC converter; 3 storage batterys; 4 control circuits;

5 starting switches; 6 full-vehicle control unit; 7 remote control units;

8 high-voltage relays; 9 self-hold circuits.

Embodiment

In order to the scheme making those skilled in the art person understand the embodiment of the present invention better, below in conjunction with drawings and embodiments, the embodiment of the present invention is described in further detail.

As shown in Figure 2, for the structural representation of a kind of car battery charging system that the embodiment of the present invention provides, high-tension battery 1 can be comprised, 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 the full-vehicle control unit (VehicleControlUnit between DC-to-DC converter 2 and starting switch 5, be called for short VCU) 6, and the remote control unit 7 (English abbreviation T-BOX) to be connected with storage battery 3, self-hold circuit 9 can also be connected with between remote control unit 7 and entire car controller 6.Full-vehicle control unit 6 can gather starting switch status signal, and after collecting starting switch 5 cut-off signal, start the first electricity detecting storage battery 3, and calculate car load according to the first electricity can time of repose, then send request the lower signal of telecommunication to self-hold circuit 9; Self-hold circuit 9 can receive under request after the signal of telecommunication, electric under controlling car load; Remote control unit 7 can carry out timing to the electricity time under car load, and under car load the electricity time reach car load and after time of repose, wake-up signal can be sent to self-hold circuit 9; Self-hold circuit 9 after receiving wake-up signal, can also wake full-vehicle control unit 6 up; Full-vehicle control unit 6 can start the second electricity detecting storage battery 3 after being waken up, and calculates the expectation charging interval according to the second electricity, 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.After full-vehicle control unit collects starting switch cut-off signal, electric under can not controlling car load at once, but certain lower electric delay time is set, full-vehicle control unit detect within this time of delay storage battery the first electricity and calculate car load can time of repose, then just send lower electric request signal to self-hold circuit, self-hold circuit is electric control car load after receiving lower electric request signal under.Under car load after electricity, DC-to-DC converter will quit work, thus make high-tension battery no longer to charge in batteries.Wherein, self-hold circuit specifically can adopt implementation the most conventional in prior art, such as, adopts one or more relay to be connected and is realized, repeat no more herein.

Full-vehicle control unit, after detecting the first electricity of storage battery, first can calculate the SOC (state-of-charge, StateOfCharge) of storage battery according to this first voltameter, and then calculate car load according to SOC 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, has electricity complete feed can not occur and can ensure that car load normally starts the time that can continue with storage battery.

In embodiments of the present invention, the SOC computational methods of storage battery can be:

SOC = SOC 0 + 1 sCnom ∫ Ibatdt + SOC t + SOC e

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, after the first electricity that full-vehicle control unit inspection goes out storage battery or the second electricity, the SOC of storage battery can be gone out by above-mentioned formulae discovery.

As shown in Figure 3, for the SOC of storage battery and car load can graph of relation between time of repose.

Full-vehicle control unit can functional relation between time of repose according to the storage battery SOC calculated and car load, and calculating car load can time of repose T 1:

T 1=f(SOC,Ibat,Vbat)+f(Iveh,Vveh)

Wherein, T 1for car load can time of repose, f is correspondence rule, and Ibat is battery current, and Vbat is battery tension, and Iveh is the electric current in circuit, and Vveh is the voltage at circuit two ends.

As shown in Figure 4, be the SOC of storage battery and the graph of relation between the expectation charging interval.

Full-vehicle control unit according to the functional relation between the storage battery SOC calculated and expectation charging interval, can calculate and estimate charging interval T 2:

T 2=f(SOC,Ibat,Vbat)

Wherein, T 2for car load can time of repose, 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 full-vehicle control unit 6, high-voltage relay 8 to control under car load after electricity in self-hold circuit 9, can connection between cutoff high battery 1 and DC-to-DC converter 2, thus stop charging to storage battery 3.

The car battery charging system that the embodiment of the present invention provides, after starting switch cut-off signal being detected, electric under not controlling car load at once, but the lower electric delay time will be set, by detecting accumulator electric-quantity within this time of delay, calculate car load can just control car load after time of repose under electric, under car load the electricity time reach car load can after time of repose, again detect accumulator electric-quantity, calculate and estimate the charging interval, and according to this expectation charging interval, storage battery is charged.This car battery charging system and method, only needing the electricity time after starting switch cut-off signal being detected and under car load to reach car load can the electricity of just detection storage battery after time of repose, and do not need the moment 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 additionally 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 the first electricity detecting storage battery, and calculate car load according to the first electricity can time of repose, then send request the lower signal of telecommunication to self-hold circuit;

Step 102: self-hold circuit is receiving under request after the signal of telecommunication, electric under controlling car load;

Step 103: timing is carried out to the electricity time under car load, and under car load the electricity time reach car load can after time of repose, start the second electricity detecting storage battery, and calculate the expectation charging interval according to the second electricity, then the charging interval charges to storage battery according to expectation.

Wherein, in above-mentioned steps, preferably adopt full-vehicle control unit to gather the status signal of starting switch, detect the first electricity of storage battery, and calculate car load according to detected the first electricity can time of repose, and send request the lower signal of telecommunication to self-hold circuit, remote control unit (T-BOX) can be passed through timing is carried out to the electricity time under car load.By the action performed by full-vehicle control unit, remote control unit, can certainly be realized by software programming.

Under car load the electricity time reach car load can after time of repose, also comprise: send wake-up signal to self-hold circuit, self-hold circuit, after receiving wake-up signal, wakes full-vehicle control unit up, carries out the detection of storage battery second electricity to make full-vehicle control unit and estimates the calculating in charging interval.

Wherein, under car load, the electricity time reaches car load and after time of repose, can continue feed and causing car load normally to start, needing to start as charge in batteries to prevent storage battery.By detecting the second electricity of storage battery, more adequately can calculate and estimate the charging interval, reach when charging after estimating the charging interval and automatically can stop charging, thus effective energy savings, prevent from continuing the contingent security incident problem of charging simultaneously.

Above-mentioned according to first electricity calculate car load can comprise by time of repose: according to the SOC of the first electricity calculating accumulator, and according to SOC calculate car load can time of repose.

Above-mentioned calculating according to the second electricity estimates that the charging interval can comprise: according to the SOC of the second electricity calculating accumulator, and calculate the expectation charging interval according to SOC.

Wherein, the SOC of storage battery, car load can time of repose identical with system embodiment with the computational methods and formula 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, electric under not controlling car load at once, but the lower electric delay time will be set, by detecting accumulator electric-quantity within this time of delay, calculate car load can just control car load after time of repose under electric, under car load the electricity time reach car load can after time of repose, again detect accumulator electric-quantity, calculate and estimate the charging interval, and according to this expectation charging interval, storage battery is charged.This car battery charging system and method, only needing the electricity time after starting switch cut-off signal being detected and under car load to reach car load can the electricity of just detection storage battery after time of repose, and do not need the moment 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 see, what each embodiment stressed is the difference with other embodiments.Especially, for embodiment of the method, because it is substantially similar to system embodiment, so describe fairly simple, relevant part illustrates see the part of system embodiment.Wherein, the annexation of each circuit element as executive agent related 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 corresponding function can be realized all fall into protection scope of the present invention.System embodiment described above is only schematic, the wherein said unit illustrated as separating component or can may not be and physically separates, parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed in multiple network element.Some or all of module wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.Those of ordinary skill in the art, when not paying creative work, are namely appreciated that and implement.

The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (7)

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 full-vehicle control unit between described DC-to-DC converter and starting switch, and the remote control unit to be connected with described storage battery, be connected with self-hold circuit between described remote control unit and described entire car controller;
Described full-vehicle control unit, for gathering starting switch status signal, and after collecting described starting switch cut-off signal, start the first electricity detecting storage battery, and calculate car load according to described first electricity can time of repose, then send request the lower signal of telecommunication to described self-hold circuit;
Described self-hold circuit, for receiving under described request after the signal of telecommunication, electric under controlling car load;
Described remote control unit, for carrying out timing to the electricity time under car load, and under described car load the electricity time reach described car load and after time of repose, wake-up signal can be sent to described self-hold circuit;
Described self-hold circuit, also for after receiving described wake-up signal, wakes described full-vehicle control unit up;
Described full-vehicle control unit, also for starting the second electricity detecting described storage battery after being waken up, and calculating the expectation charging interval according to described second electricity, then charging to described storage battery according to the described expectation charging interval.
2. car battery charging system according to claim 1, is characterized in that, 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 full-vehicle control unit, described high-voltage relay to control under car load after electricity in described self-hold circuit, cut off the connection between described high-tension battery and described DC-to-DC converter, stop described charge in batteries.
3. the car battery charging system according to any one of claim 1 or 2, it is characterized in that, described according to described first electricity calculate car load can comprise by time of repose: the SOC calculating described storage battery according to described first electricity, then calculating described car load according to described SOC can time of repose.
4. the car battery charging system according to any one of claim 1 or 2, it is characterized in that, described calculating according to described second electricity estimates that the charging interval comprises: the SOC calculating described storage battery according to described second electricity, then calculates the described expectation charging interval according to described SOC.
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 the first electricity detecting storage battery, and calculate car load according to described first electricity can time of repose, then send request the lower signal of telecommunication to self-hold circuit;
Described self-hold circuit is receiving under described request after the signal of telecommunication, electric under controlling car load;
Timing is carried out to the electricity time under car load, and under described car load the electricity time reach described car load can after time of repose, wake-up signal is sent to described self-hold circuit, described self-hold circuit is after receiving described wake-up signal, wake full-vehicle control unit up, described full-vehicle control unit starts the second electricity detecting described storage battery, and calculates the expectation charging interval according to described second electricity, then charges to described storage battery according to the described expectation charging interval.
6. car battery charging method according to claim 5, it is characterized in that: described according to described first electricity calculate car load can comprise by time of repose: the SOC calculating described storage battery according to described first electricity, and calculate described car load according to described SOC can time of repose.
7. car battery charging method according to claim 5, it is characterized in that, described calculating according to described second electricity estimates that the charging interval comprises: the SOC calculating described storage battery according to described second electricity, and calculates the described expectation charging interval according to described SOC.
CN201410225942.XA 2014-05-23 2014-05-23 A kind of car battery charging system and method CN103986209B (en)

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CN105922873B (en) * 2016-05-18 2018-05-04 北京新能源汽车股份有限公司 The charge control method and system of vehicle and low tension battery for vehicle
CN105978087B (en) * 2016-06-17 2019-01-18 北京车和家信息技术有限公司 Low tension battery charge control method, device and the vehicle of vehicle
CN106295830A (en) * 2016-08-27 2017-01-04 许继电气股份有限公司 A kind of charging pile system
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CN106515491B (en) * 2016-11-30 2019-03-26 安徽江淮汽车集团股份有限公司 A kind of vehicle-mounted battery automatic recharging method of electric car and system
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CN107225988A (en) * 2017-05-31 2017-10-03 武汉英泰斯特电子技术有限公司 A kind of dynamic timing wakes up electric vehicle battery and mends method for electrically and control terminal
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