CN100566009C - Electronic load simulation charger method of operation and device thereof - Google Patents
Electronic load simulation charger method of operation and device thereof Download PDFInfo
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- CN100566009C CN100566009C CNB2007100043789A CN200710004378A CN100566009C CN 100566009 C CN100566009 C CN 100566009C CN B2007100043789 A CNB2007100043789 A CN B2007100043789A CN 200710004378 A CN200710004378 A CN 200710004378A CN 100566009 C CN100566009 C CN 100566009C
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- 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 a kind of electronic load simulation charger method of operation and device thereof.This method comprises the steps: at first, and a charger to be measured is connected an electronic load to constitute a charge circuit; Subsequently, set at least one predeterminated voltage value and the predetermined current restriction of this electronic load; Next, according to this predeterminated voltage value and predetermined current restriction, calculate corresponding one default resistance value; Then, start this electronic load, and begin to produce charging current and carry out emulation according to aforementioned default resistance value; Reach when stablizing in electronic load and charger to be measured, measure the charging voltage value of charger to be measured and charging current value at least one of them; If charging voltage value differs from the predeterminated voltage value or charging current value differs from the predetermined current restriction, then default resistance value is compensated, with charging voltage value and the charging current value that changes charger to be measured; The charging voltage value that this compensation process proceeds to after the compensation always is equal to the predeterminated voltage value.
Description
Technical field
The present invention is about method and the device thereof of a kind of simulation charger to battery charge, especially in regard to a kind of with method of operation and the device thereof of electronic load simulation charger to battery charge.
Background technology
Now with electronic load (electronic 1oad) testing charger to battery charge, all operate with constant voltage mode (CV Mode, Constant Voltage Mode).Just, charger to be measured is reached decide electric current output, the voltage power supply that charger to be measured is set according to electronic load by the change charging current.
Please refer to shown in Figure 1ly, is that a typical case is with the block schematic diagram of electronic load simulation charger to the device of battery charge behavior.Be a charger 10 to be measured in the dotted line among the figure, electronic load unit 20 forms a charge circuit for connecting this charger 10 to be measured.Micro-control unit (MPU) 30 is for be connected to the voltage measuring end of electronic load unit 20 by circuit, to measure its magnitude of voltage Vo.
Fig. 2 is with the device simulation charger of Fig. 1 flow chart to the battery charge behavior.As shown in FIG., after the predeterminated voltage value of setting electronic load (seeing step 120), start electronic load (seeing step 130).Subsequently, measure the magnitude of voltage Vo (seeing step 140) of voltage measuring end.Next, shown in step 150, whether comparing voltage value Vo is identical with the magnitude of voltage that electronic load sets.If inequality, shown in step 160, when the voltage that the magnitude of voltage Vo that equivalent measures sets than electronic load was high, the electric current I o that micro-control unit 30 increases on the loops by digital analog converter (DAC) control electronic load unit 20 was so that magnitude of voltage Vo descends.Otherwise then micro-control unit 30 reduces electric current I o by digital analog converter control electronic load unit 20, and magnitude of voltage Vo is risen.Adjust through repeating, the voltage that can make the magnitude of voltage Vo that measures and setting is identical and reach balance (seeing step 170).
Basically, before with electronic load charger being tested, all can be set in the magnitude of voltage under the constant voltage mode, the electric current restriction and the reaction speed thereof of load.Wherein the electric current of load is restricted to protection charger to be measured; make electronic load when moving with constant voltage mode not according to the characteristic of charger to be measured (under constant voltage mode; might produce excessive charging current and jeopardize charger to be measured), charger to be measured still can obtain basic protection.And reaction speed is set charger to be measured and is started to reaching the required time of setting voltage value by beginning.
Industry is applied to the constant voltage mode (being Fig. 1 and test process shown in Figure 2) of electronic load simulation at present, and the mode with the charging voltage value of adjusting charger to be measured makes it meet the default magnitude of voltage of electronic load.But, whether the charging current of but considering to recharge here voltage under and being produced meets the electric current when charger to be measured is actual to charge.
Secondly, the behavior of the charging of battery is charger and battery two aspect characteristic results of interaction.Aforesaid emulation mode decides, orders about or force charger action to be measured with the one-side running of electronic load.Even charging voltage value and the realistic charged state of charging current value after stable, still correctly emulation by the process that begins to charge up to reaching stable state.Therefore, the present invention proposes a kind of apparatus and method with the electronic load simulation charger operation, to obtain more approaching real charging simulation process.
Summary of the invention
Main purpose of the present invention is to utilize the operation of impedance (impedance) form simulation charger, to obtain more approaching real simulation process.
The invention provides a kind of device with the electronic load simulation charger operation, this device comprises an electronic load unit and a micro-control unit.This electronic load unit is connected to a charger to be measured, and with its formation one loop.Micro-control unit input has at least one predeterminated voltage value and predetermined current restriction, and according to this predeterminated voltage value therewith the predetermined current limit calculation go out a corresponding default resistance value, with control electronic load unit generation charging current.Has a compensating unit in this micro-control unit, this compensating unit reaches when stablizing in electronic load unit and charger to be measured, measure the charging voltage value of charger to be measured and charging current value at least one of them, and compare with predeterminated voltage value and predetermined current restriction.If charging current value differs from the predetermined current restriction or charging voltage value differs from the predeterminated voltage value, then default resistance value is compensated.The charging voltage value that this compensation process proceeds to after the compensation always is equal to the predeterminated voltage value.
According to aforementioned means, the present invention also provides a kind of with the electronic load simulation charger method of operating.At first, a charger to be measured is connected an electronic load to constitute a charge circuit.Subsequently, set at least one predeterminated voltage value and the predetermined current restriction of this electronic load.Next, according to this predeterminated voltage value and predetermined current restriction, calculate corresponding one default resistance value.Then, start this electronic load, and begin to produce charging current and carry out emulation according to aforementioned default resistance value.Through a make-up time, reach when stablizing in electronic load and charger to be measured, measure the charging voltage value of charger to be measured and charging current value at least one of them.If charging voltage value differs from the predeterminated voltage value or charging current value differs from the predetermined current restriction, then default resistance value is compensated, with charging voltage value and the charging current value that changes charger to be measured.The charging voltage value that this compensation process proceeds to after the compensation always is equal to the predeterminated voltage value.
In sum, compared to the operation of tradition with the constant voltage mode simulation charger, the present invention utilizes the operation of impedance (impedance) form simulation charger, the shortcoming that can avoid traditional approach to decide, order about with the one-side running of electronic load or force charger action to be measured to be produced is so that the result of emulation is more approaching true.Simultaneously, by suitable parameter setting, the present invention more correctly emulation by the process that begins to charge up to reaching stable state.
Description of drawings
Fig. 1 is that a typical case is with the block schematic diagram of electronic load simulation charger to the device of battery charge behavior;
Fig. 2 is the flow chart that utilizes the device simulation charger method of operating of Fig. 1;
Fig. 3 is that the present invention is with the block schematic diagram of electronic load simulation charger to device one preferred embodiment of battery charge behavior;
Fig. 4 is the device simulation charger method of operating one preferable flow chart of implementing profit that utilizes Fig. 3 of the present invention;
Fig. 5 is a curve chart that illustrates the process that charging current value and charging voltage value change under the running of compensation program of the present invention;
The curve chart that Fig. 6 comes out with the emulation of electronic load simulation charger method of operating one preferred embodiment institute for the present invention.
The main element symbol description:
Charger to be measured 10 electronic load unit 40
Micro-control unit 50 compensating units 52
Embodiment
The present invention is described in detail below in conjunction with accompanying drawing.
Please refer to shown in Figure 3, for the present invention with the block schematic diagram of electronic load simulation charger to device one preferred embodiment of battery charge behavior.As shown in FIG., this device mainly is made of an electronic load unit 40 and a micro-control unit 50.This micro-control unit 50 also has a compensating unit 52 in wherein.
Wherein, electronic load unit 40 is connected to a charger 10 to be measured, and with its formation one charge circuit.Micro-control unit 50 input has at least one predeterminated voltage value Vp and predetermined current restriction Ip, and according to this predeterminated voltage value Vp therewith predetermined current limit Ip and calculate a corresponding default resistance value Rp.Then, micro-control unit 50 produces charging current again according to this default resistance value Rp by a digital analog converter (DAC) control electronic load unit 40.Compensating unit 52 40 reaches when stablizing with charger 10 to be measured in the electronic load unit, the charging voltage value Vo that measures charger 10 to be measured by an analog-digital converter (ADC) and charging current value Io at least one of them, and limit Ip with predeterminated voltage value Vp and predetermined current and compare.If charging current value Io differs from predetermined current restriction Ip or charging voltage value Vo differs from predeterminated voltage value Vp, then default resistance value Rp is compensated.The charging voltage value Vo ' that this compensation process proceeds to after the compensation always is equal to predeterminated voltage value Vp.
Please refer to shown in Figure 4ly simultaneously, utilize the device simulation charger method of operating of Fig. 3 of the present invention, the flow chart of a preferred embodiment.At first, shown in step 210, charger to be measured is connected electronic load to begin to carry out this simulated program.Subsequently, shown in step 220, set at least one predeterminated voltage value Vp and the predetermined current restriction Ip of this electronic load.Next, shown in step 230, calculate corresponding one default resistance value Rp according to this predeterminated voltage value Vp and predetermined current restriction Ip again.Basically, this default resistance value Rp equals predeterminated voltage value Vp and limits Ip (Rp=Vp/Ip) divided by predetermined current.
Then, shown in step 240, start this electronic load, and begin to produce charging current to carry out emulation according to aforementioned default resistance value Rp.In the case, electronic load adopts the constant impedance pattern to carry out emulation.And for charger to be measured, as being connected to an impedance (Impedance) with this default resistance value.
Next, shown in step 250, make electronic load and charger to be measured reach stable back (when common charger to be measured is in and decides electric current and decide voltage to export) through certain hour, measure current charging voltage value Vo of charger to be measured and charging current value Io at least one of them.
Then, shown in step 260, relatively measure the charging voltage value Vo and the predeterminated voltage value Vp of gained, and charging current value Io and predetermined current restriction Ip.(Vo ≠ Vp) or charging current value differ from predetermined current restriction (Io ≠ Ip) if charging voltage value differs from the predeterminated voltage value, then default resistance value Rp is carried out the following compensation program of step 270, with charging voltage value Vo and the charging current value Io that changes charger to be measured.If identical, shown in step 280, represent that then this default resistance value Rp has been correct simulation parameter, and need not compensate program.Basically, the charging voltage value Vo that always proceeds to after the compensation of this compensation program is equal to till the predeterminated voltage value Vp.
Fig. 4 also shows compensation program one preferred embodiment of the present invention.At first, shown in step 270, according to the preceding charging current value Io that measures gained of predeterminated voltage value Vp and compensation of step 220 input, the resistance value Ro ' behind the setting compensation is to change the setting of electronic load.Basically, this compensation after resistance value Ro ' promptly equal predeterminated voltage value Vp divided by charging current value Io (Ro '=Vp/Io).
Then, repeating step 250 and step 260 reach when stablize in electronic load and charger to be measured, measure the charging voltage value Vo ' after the charger compensation to be measured and compensate after charging current value Io ' at least one of them.Next, relatively measure the charging voltage value (i.e. charging voltage value Vo ' after the compensation) and predeterminated voltage value Vp of gained, and the charging current value (i.e. charging current value Io ' after the compensation) and the charging current value Io before the compensation (differing from predetermined current restriction Ip in the former emulation flow process) that measure gained.If the charging voltage value Vo ' after this compensation differs from predeterminated voltage value Vp, then repeat aforementioned compensation program, if identical, then the resistance value Ro ' after this compensation is correct simulation parameter.
Please refer to shown in Figure 5, under the running that illustrates aforementioned compensation program, the process that charging current value Io and charging voltage value Vo change.Suppose that the actual charging voltage of charger to be measured is 14V, actual electric current is restricted to 3A.But the predetermined current that electronic load sets is restricted to 2A, the predeterminated voltage value is 12V.Is 6 ohm according to this predetermined current restriction with the default resistance value that the predeterminated voltage value is estimated.Therefore, electronic load is the impedance of 6 ohm of emulation.
Operate with this electronic load, certainly will can't make charger to be measured reach the steady state voltage of 12V.Operate with this impedance of 6 ohm, cooperate the actual charging voltage of charger to be measured (14V), the charging current value that is measured is 2.33A (is the actual charging voltage of charger to be measured (14V) divided by 6 ohm impedance).This charging current value 2.33A is the foundation as subsequent compensation program setting resistance value.Promptly utilize this charging current value 2.33A that measures and predeterminated voltage value 12V, estimate resistance value after the compensation and be 5.15 ohm (promptly with predeterminated voltage value 12V divided by charging current value 2.33A).And with the actual charging voltage of this resistance fit of 5.15 ohm charger to be measured (14V), the charging current value that is measured is 2.71A.This charging current value 2.71A is re-used as the foundation of subsequent compensation program setting resistance value.Promptly utilize this charging current value 2.71A that measures and predeterminated voltage value 12V, estimate resistance value after the compensation and be 4.42 ohm (promptly with predeterminated voltage value 12V divided by charging current value 2.71A).And, should produce the charging current of 3.17A with the actual charging voltage of this resistance fit of 4.42 ohm charger to be measured (14V), and but, being subject to the actual electric current restriction of charger to be measured 3A, the charging current value that is measured is 3A.This charging current value 3A is re-used as the foundation of subsequent compensation program setting resistance value.Be restricted to 3A in predetermined current, the predeterminated voltage value is under the situation of 12V, the resistance value that estimates after the compensation is 4 ohm.Operate with this impedance of 4 ohm, the charging voltage value that is measured (4 ohm impedance is multiplied by the charging current of 3A) will be consistent with predeterminated voltage value 12V.
It should be noted that by aforementioned compensation program, can know the actual electric current restriction of charger to be measured.For the operation of correct artificial actual, should in step 120, limit by the electric current that the predetermined current value Ip setting of electronic load is correct for this reason, with the practical operation of correct setting emulation charger to be measured.
Please refer to shown in Figure 6, the curve chart that comes out with the emulation of electronic load simulation charger method of operating one preferred embodiment institute for the present invention.For the running of correct simulation charger, present embodiment is set with a predeterminated voltage value Vp, predetermined current restriction Ip, a reaction time Tr and a starting resistor value Vs to electronic load.Wherein, predeterminated voltage value Vp and predetermined current restriction Ip is in order to calculate the default resistance value Rp of emulation that electronic load is desired.Starting resistor value Vs must be less than predeterminated voltage value Vp.
T among the figure
0Be the moment of expression electronic load startup.After electronic load started, by the setting of starting resistor value Vp, micro-control unit was controlled electronic load when the charging voltage V of charger to be measured surpasses starting resistor value Vs, just began to draw to carry to produce charging current I.In addition, by the setting of reaction time Tr, micro-control unit is controlled electronic load, makes to reach default resistance value Rp in its reaction time Tr after charging current begins to produce.
Except aforementioned four parameters relevant with the emulation of charging curve, the setting of in addition visible make-up time Tc among the figure.Make-up time Tc serves as reasons and begins to produce charging current until the charging voltage value Vo and the charging current value Io of charger to be measured measured institute's elapsed time.Therefore, the setting of make-up time Tc must be enough to make electronic load and charger to reach stable state.
Compared to the operation of tradition with the constant voltage mode simulation charger, the present invention utilizes the operation of impedance (impedance) form simulation charger, the shortcoming that can avoid traditional approach to decide, order about with the one-side running of electronic load or force charger action to be measured to be produced is so that the result of emulation is more approaching true.Simultaneously, by suitable parameter setting, the present invention more correctly emulation by the process that begins to charge up to reaching stable state.
The above utilizes preferred embodiment to describe the present invention in detail, but not limit the scope of the invention, and know this type of skill personage and all can understand, suitably do slightly change and adjustment, will not lose main idea of the present invention place, also not break away from the spirit and scope of the present invention.
Claims (11)
1. one kind with the electronic load simulation charger method of operating, it is characterized in that described method comprises the steps:
One charger to be measured is connected an electronic load to constitute a charge circuit;
Set at least one predeterminated voltage value and the predetermined current restriction of described electronic load;
According to described predeterminated voltage value and the restriction of described predetermined current, calculate corresponding one default resistance value;
Start described electronic load, and begin to produce charging current according to described default resistance value;
Reach when stablizing in described electronic load and described charger to be measured, measure the charging voltage value of described charger to be measured and charging current value at least one of them; And
If described charging voltage value differs from described predeterminated voltage value or described charging current value differs from described predetermined current restriction, then described default resistance value is compensated, with charging voltage value and the charging current value that changes described charger to be measured, the charging voltage value after compensation is equal to described predeterminated voltage value.
2. method according to claim 1 is characterized in that, the step that compensates described default resistance value comprises:
According to the resistance value behind the charging current value setting compensation before described predeterminated voltage value and the compensation, to change the setting of described electronic load;
Reach when stablizing in described electronic load unit and described charger to be measured, measure after charging voltage value and the compensation after the compensation of described charger to be measured charging current value at least one of them; And
If the charging voltage value after the described compensation differs from described predeterminated voltage value, then the resistance value behind the setting compensation equals the charging current value of described predeterminated voltage value after divided by described compensation, repeat described compensation process, if identical, the resistance value after the then described compensation is correct resistance value.
3. method according to claim 1, it is characterized in that, before starting described electronic load, also comprise a starting resistor value of setting described electronic load, described starting resistor value is less than described predeterminated voltage value, when the charging voltage that makes described electronic load start back and described charger to be measured surpasses described starting resistor value, just begin to produce charging current.
4. method according to claim 1, it is characterized in that, before starting described electronic load, also comprise a reaction time of setting described electronic load, make described electronic load after beginning to produce charging current, in the described reaction time, reach described default resistance value.
5. method according to claim 1, it is characterized in that, before starting described electronic load, also comprise a make-up time of setting described electronic load, the described make-up time is begun to produce to charging voltage value that measures described charger to be measured and charging current value institute elapsed time by described charging current.
6. method according to claim 1 is characterized in that, described electronic load and described charger to be measured reach when stablizing, and described charger to be measured is in to be decided electric current and decide voltage output.
7. one kind with the electronic load simulation charger method of operating, it is characterized in that described method comprises the steps:
One charger to be measured is connected an electronic load to constitute a charge circuit;
Set a predeterminated voltage value, predetermined current restriction, a starting resistor value and a reaction time of described electronic load, described starting resistor value is less than described predeterminated voltage value;
According to described predeterminated voltage value and the restriction of described predetermined current, calculate corresponding one default resistance value;
Start described electronic load according to described starting resistor value, described reaction time and described default resistance value, described electronic load just begins to produce charging current after the voltage of described charger to be measured surpasses described starting resistor value, and described electronic load reaches described default resistance value in the described reaction time after beginning to produce charging current;
After starting described electronic load, also be included in described electronic load and described charger to be measured reaches when stablizing, be that described charger to be measured is in when deciding electric current and decide voltage and exporting, measure the charging voltage value of described charger to be measured and charging current value at least one of them; And
If described charging voltage value differs from described predeterminated voltage value or described charging current value differs from described predetermined current restriction, then described default resistance value is compensated, with charging voltage value and the charging current value that changes described charger to be measured, the charging voltage value after compensation is equal to described predeterminated voltage value.
8. method according to claim 7, it is characterized in that, before starting described electronic load, also comprise a make-up time of setting described electronic load, the described make-up time is begun to produce to charging voltage value that measures described charger to be measured and charging current value institute elapsed time by described charging current.
9. method according to claim 7 is characterized in that, the step that compensates described default resistance value comprises:
According to the resistance value behind the charging current value setting compensation before described predeterminated voltage value and the compensation, to change the setting of described electronic load;
Reach when stablizing in described electronic load unit and described charger to be measured, measure after charging voltage value and the compensation after the compensation of described charger to be measured charging current value at least one of them; And
If the charging voltage value after the described compensation differs from described predeterminated voltage value, then the resistance value behind the setting compensation equals the charging current value of described predeterminated voltage value after divided by described compensation, repeat described compensation process, if identical, the resistance value after the then described compensation is correct resistance value.
10. method according to claim 7 is characterized in that, if the correct electric current restriction of known described charger to be measured, the predetermined current of then setting described electronic load is restricted to described correct electric current restriction.
11. the device with the electronic load simulation charger operation is characterized in that described device comprises:
One electronic load unit is connected to a charger to be measured, and with its formation one charge circuit; And
One micro-control unit, input has at least one predeterminated voltage value and predetermined current restriction, and go out a corresponding default resistance value according to described predeterminated voltage value and described predetermined current limit calculation, to control described electronic load unit generation charging current, described micro-control unit comprises:
One compensating unit, reach when stablizing in described electronic load unit and described charger to be measured, measure the charging voltage value of described charger to be measured and charging current value at least one of them, and compare with the restriction of described predeterminated voltage value and described predetermined current, if described charging current value differs from described predetermined current restriction or described charging voltage value differs from described predeterminated voltage value, then described default resistance value is compensated, the charging voltage value after compensation is equal to described predeterminated voltage value.
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| CN101741110B (en) * | 2008-11-25 | 2011-11-23 | 英业达股份有限公司 | Feature simulating circuit of charging device |
| US8664921B2 (en) * | 2011-08-04 | 2014-03-04 | Tektronix, Inc. | Means of providing variable reactive load capability on an electronic load |
| CN103344904B (en) * | 2013-06-13 | 2015-11-18 | 福建联迪商用设备有限公司 | A kind of for checking simulation lithium battery method of testing and the circuit of product charging circuit |
| CN105790603B (en) * | 2014-12-22 | 2018-09-25 | 华硕电脑股份有限公司 | Method for controlling power supply and apply its portable electronic devices |
| CN106546822B (en) * | 2016-10-26 | 2019-04-05 | 珠海市魅族科技有限公司 | Impedance detection method, chip and the mobile terminal of the charging circuit of load |
| WO2020062138A1 (en) * | 2018-09-29 | 2020-04-02 | Oppo广东移动通信有限公司 | Adapter testing apparatus and method, and computer storage medium |
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