CN102738863A - Constant voltage control and constant current control seamlessly switching method in charging power source and device thereof - Google Patents
Constant voltage control and constant current control seamlessly switching method in charging power source and device thereof Download PDFInfo
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Abstract
The invention relates to a constant voltage control and constant current control seamlessly switching method in a charging power source and a device thereof. A switching combination control unit is added in the control of the charging power source, the switching combination control unit comprises a voltage and current detecting module, a weighting coefficient control module, a memory module and a switching combination calculation module. The current charging state is judged by the weighting coefficient control module according to the numerical values of current voltage and current detected by the voltage and current detecting module, the weighting coefficient of the voltage and the current is calculated to obtain a switching combination result, and the switching combination result is used for producing driving pulse which is used for driving a power switch element of the charging power source. The proportion of the voltage and the current in the switching combination result is controlled by controlling the numerical value of the weighting coefficient, the change between the constant voltage and the constant current is slow, the smooth seamless transition of the switching process can be realized, and the oscillating phenomenon can be completely avoided so as to guarantee the stability of the charging process.
Description
Technical field
The present invention relates to numerically controlled charge power supply, the seamless handover method in the particularly numerical control charge power supply between constant voltage control and the constant current control.
Background technology
The charge in batteries power supply need carry out accurate constant voltage control and constant current control, is a problem that never has fine solution but switch between constant voltage state of a control and the constant current state of a control.Wu Jin, citrine give birth to, and Xie Linghan is happy loyal bright, and Chen Sitao is interim " electronic device " 2008 the 5th, in the article of show " a kind of lithium ion battery linear-charging Control System Design ", disclose a kind of method of automatic switchover between constant voltage control and constant current are controlled.The flow process of this method is that battery voltage range is detected earlier in the back that powers on, and when cell voltage during less than 2.9V, adopts trickle charge, otherwise the beginning constant current charge.In the trickle charge process, cell voltage slowly increases, and then transfers constant current charge when detecting to after cell voltage rises to greater than 2.9V, and the constant current charge to set, and cell voltage is with higher rate increase.When being charged near 4.2V, constant current charge finishes.Then with the 4.2V constant voltage charge, when constant voltage charge, voltage is almost constant, and charging current then constantly descends.When drop to specified constant current charge electric current 1/10 the time, battery is full of, and stops charging.Stop charging back system and constantly monitor cell voltage, when cell voltage dropped to 4.05V, charging cycle started once more.
When but this method is switched between constant voltage control and constant current control on the one hand; Be directly to control the result by the direct saltus step of constant voltage control result to constant current; Or control the direct saltus step of result to constant voltage by constant current and control the result; Be the process of a direct-cut operation, rather than a level and smooth transient process, can make charging voltage or electric current generation saltus step.On the other hand, when the charge power supply load condition is in switching critical points, also can appear at the frequent phenomenon of switching between constant voltage control and the constant current control, also can occur vibration when serious, influence the charging effect and the life-span of battery.
Summary of the invention
To above-mentioned deficiency; The present invention provides the seamless switching method and apparatus that constant voltage is controlled and constant current is controlled in a kind of charge power supply; Adopt this method and apparatus can effectively solve charging voltage or electric current generation saltus step, the frequent problem of switching between constant voltage control and the constant current control.
Technical solution of the present invention:
The seamless handover method of constant voltage control and constant current control comprises the steps: in a kind of charge power supply
One voltage, current detection module detect the current voltage and current numerical value of charge power supply, and said current voltage and current numerical value is transferred to a weight coefficient control module;
One current charged state judgment sub-unit module of said weight coefficient control module is judged the current charged state of said charge power supply according to the said current voltage, the current values that receive; One weight coefficient computation subunit module of said weight coefficient control module; From a memory module, extract voltage weight coefficient m and electric current weighting coefficient n last numerical value m (t-1) and n (t-1) and said voltage weight coefficient m and the variation delta m in electric current weighting coefficient each cycle of n and Δ n constantly; According to said current charged state; Keeping said voltage weight coefficient m and sum of the two consistent with electric current weighting coefficient n rate of change is under 1 the situation at any time; Progressively increase or reduce voltage weight coefficient m; While progressively reduces or increases electric current weighting coefficient n, calculates current time voltage weight coefficient m (t) and current time electric current weighting coefficient n (t) and deposits it in said memory module;
Current constant voltage control result and said current time voltage weight coefficient m (t) multiplied each other draw the constant voltage weighing computation results; Current constant current control result and said current time electric current weighting coefficient n (t) multiplied each other draw the constant current weighing computation results; Again said constant voltage weighing computation results and constant current weighing computation results are passed through the adder computing, obtain switching synthetic result;
Synthetic result exports to a driving pulse generation unit with said switching, drives the device for power switching in the numerical control charge power supply thereby generate driving pulse.
When said voltage, current detection module detected the constant and voltage of the charging current of said charge power supply less than certain thresholding, current charged state judgment sub-unit module confirmed that the current state of said charge power supply is a constant current state, this moment m=0, n=1.
Under said constant current state, if the voltage that detects said charge power supply during greater than certain thresholding, confirms that then the current state of said charge power supply is that constant current state is switched to pressure constant state, then m progressively increases to 1 by 0, this moment m (t)=m (t-1)+Δ m; It is 0 that while n gradually reduces by 1, at this moment n (t)=n (t-1)-Δ n.
When said voltage, current detection module detected the constant and electric current of said charge power supply charging voltage less than certain thresholding, current charged state judgment sub-unit module confirmed that the current state of said charge power supply is a pressure constant state, this moment m=1, n=0.
Under said pressure constant state, if the electric current that detects said charge power supply during greater than certain thresholding, the current state of confirming said charge power supply is that pressure constant state switches to constant current state, and then to gradually reduce by 1 be 0 to m, this moment m (t)=m (t-1)-Δ m; N progressively increases to 1 by 0 simultaneously, at this moment n (t)=n (t-1)+Δ n.
The variation delta m=Δ n=in said voltage weight coefficient m and electric current weighting coefficient each cycle of n switches duration/control cycle.
The seamless switching device of constant voltage control and constant current control in a kind of charge power supply comprises: a constant voltage control unit is used for constant voltage control, and produces constant voltage and control the result; One constant current control unit is used for constant current control, and produces constant current control result; The driving pulse generation unit drives the device for power switching in the numerical control charge power supply with generating driving pulse; It is characterized in that also comprising that one switches synthetic control unit, be used for said constant voltage control result and constant current control result are switched the synthetic said driving pulse generation unit of exporting to;
The synthetic control unit of said switching comprises: a voltage, current detection module, and a weight coefficient control module, a memory module and is switched synthetic computing module; Wherein,
Said voltage, current detection module are used for detecting the current voltage and current numerical value of charge power supply, and said current voltage and current numerical value is transferred to said weight coefficient control module;
Said memory module was used for storage voltage weight coefficient m and electric current weighting coefficient n current time m (t) and the n (t) and the numerical value m (t-1) and the n (t-1) in a lasted moment and said voltage weight coefficient m and the variation delta m in electric current weighting coefficient each cycle of n and Δ n;
Said weight coefficient control module comprises a current charged state judgment sub-unit module, is used for judging the current charged state of said charge power supply according to the said current voltage, the current values that receive; One weight coefficient computation subunit module; Be used for from said memory module, extracting said voltage weight coefficient m and electric current weighting coefficient n last numerical value m (t-1) and n (t-1) constantly; According to said current charged state; Progressively increase or reduce voltage weight coefficient m, the while progressively reduces accordingly or increases electric current weighting coefficient n, calculates current time voltage weight coefficient m (t) and current time electric current weighting coefficient n (t) and deposits it in said memory module;
Computing module is synthesized in said switching; Be used for current constant voltage control result and said current time voltage weight coefficient m (t) multiplied each other and draw the constant voltage weighing computation results; Current constant current control result and said current time electric current weighting coefficient n (t) multiplied each other draw the constant current weighing computation results; Again said constant voltage weighing computation results and constant current weighing computation results are passed through the adder computing, obtain switching synthetic result;
Said driving pulse generation unit receives the synthetic result of switching of the synthetic computing module output of said switching, generates driving pulse and drives the device for power switching in the numerical control charge power supply.
Said switching synthesis module comprises multiplier and adder; Said constant voltage control result and said voltage weight coefficient draw said constant voltage weighted results through the multiplier computing; Said constant current control result and said electric current weighting coefficient draw said constant current weighted results through the multiplier computing, and said constant voltage weighted results and said constant current weighted results obtain switching synthetic result transmission through adder and give said driving pulse generation module.
Charge power supply mainly is the numerical control power supply that charges among the present invention.
Beneficial effect
The present invention is switched synthetic control unit through in the control of charge power supply, increasing by one; When charge power supply need switch to constant current state or when constant current state switches to pressure constant state by pressure constant state; Through weight coefficient control module control voltage, the proportion of electric current weighting coefficient in switching synthetic result; Thereby make the synthetic result of switching produce driving pulse, be used for controlling charge power supply, make handoff procedure realize level and smooth seamless transitions; And can avoid the generation of oscillatory occurences fully, to guarantee the stable of charging process.
Description of drawings
The included accompanying drawing of the present invention is used to provide the further understanding to the embodiment of the invention, and the part that it has constituted specification is used for the illustration embodiments of the invention, and comes together to explain principle of the present invention with text description.Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.
The seamless handover method flow chart of constant voltage control and constant current control in Fig. 1 charge power supply; ...
The seamless switching device pie graph of constant voltage control and constant current control in Fig. 2 charge power supply;
Fig. 3 switches synthetic control unit pie graph;
Fig. 4 weight coefficient control module pie graph;
Fig. 5 switches synthetic computing module pie graph;
Fig. 6 weight coefficient control module workflow diagram;
Voltage weight coefficient m and electric current weighting coefficient n change curve under Fig. 7 constant voltage state of a control;
Fig. 8 constant voltage state of a control is voltage weight coefficient m and electric current weighting coefficient n change curve in constant current state of a control handoff procedure;
Voltage weight coefficient m and electric current weighting coefficient n change curve under Fig. 9 constant current state of a control;
Figure 10 constant current state of a control is voltage weight coefficient m and electric current weighting coefficient n change curve in constant voltage state of a control handoff procedure
Embodiment
To combine accompanying drawing that specific embodiment of the present invention is elaborated below.In the following description, nonrestrictive purpose has been set forth detail from explaining, to help to understand all sidedly the present invention.Yet, it will be apparent to those skilled in the art that also and can in having broken away from other embodiment of these details, put into practice the present invention.
Need to prove at this,, only show in the accompanying drawings and closely-related device structure of scheme according to the present invention and/or treatment step, and omitted other details little with relation of the present invention for fear of having blured the present invention because of unnecessary details.
With reference to the accompanying drawings embodiments of the invention are described.
As shown in Figure 1; The flow chart of the seamless handover method of constant voltage control and constant current control in a kind of charge power supply; Step S1; Voltage, current detection module 301 detect current charge power supply voltage and current numerical value, and said numerical value charge power supply voltage and current numerical value are transferred to weight coefficient control module 303.Step S2, the current charged state judgment sub-unit module 401 of said weight coefficient control module 303 is judged the current charged state of said charge power supply according to the said current voltage, the current values that receive.Step S3; One weight coefficient computation subunit module 402 of said weight coefficient control module 303; From memory module 302, extract voltage weight coefficient m and electric current weighting coefficient n last numerical value m (t-1) and n (t-1) and said voltage weight coefficient m and the variation delta m in electric current weighting coefficient each cycle of n and Δ n constantly; According to said current charged state, calculate current time voltage weight coefficient m (t) and current time electric current weighting coefficient n (t).Above-mentioned steps S2 and step S3, it is following that current charged state judgement and weight coefficient calculate detailed process:
Current state judgement as shown in Figure 5 and m, n calculation flow chart; When said voltage, current detection module 301 detect the constant and voltage of the charging current of said charge power supply less than certain thresholding (be recharged battery rated voltage 1.1 times); Current charged state judgment sub-unit module 401 confirms that the current state of said charge power supply is a constant current state; This moment voltage weight coefficient m=0, electric current weighting coefficient n=1; Under said constant current state; If the voltage that detects said charge power supply is during greater than certain thresholding (be recharged battery rated voltage 1.1 times); The current state of then confirming said charge power supply is that constant current state is switched to pressure constant state, and then said voltage weight coefficient m and electric current weighting coefficient n be at assurance same rate mutually, and both sums are under 1 the condition at any time; M progressively increases to 1 by 0, at this moment m (t)=m (t-1)+Δ m; It is 0 that while n gradually reduces by 1, at this moment n (t)=n (t-1)-Δ n.
When said voltage, current detection module 301 detect the constant and electric current of said charge power supply charging voltage less than certain thresholding (be recharged battery volt-ampere number 0.1 times); Current charged state judgment sub-unit module 401 confirms that the current state of said charge power supply is a pressure constant state; This moment m=1, n=0.Under said pressure constant state; If the electric current that detects said charge power supply is during greater than certain thresholding (be recharged battery volt-ampere number 0.1 times); The current state of confirming said charge power supply is that pressure constant state switches to constant current state, and then said voltage weight coefficient m and electric current weighting coefficient n are guaranteeing same rate mutually, and both sums are under 1 the condition at any time; It is 0 that m gradually reduces by 1, at this moment m (t)=m (t-1)-Δ m; N progressively increases to 1 by 0 simultaneously, at this moment n (t)=n (t-1)+Δ n.
Said constant current state is switched in two kinds of handoff procedures to constant current state to pressure constant state switching and pressure constant state; The variation delta m=Δ n=in said voltage weight coefficient m and electric current weighting coefficient each cycle of n switches duration/control cycle; In the present embodiment; Switch duration=1 second, control cycle=50 microseconds.Current m (t) that obtains and n (t) numerical value that said weight coefficient computation subunit module 402 will be calculated are transferred to said memory module 302.
Step S4; Switch synthetic control unit 203 and current constant voltage control result is multiplied each other with said current time voltage weight coefficient m (t) draw the constant voltage weighing computation results, result and said current time electric current weighting coefficient n (t) are controlled in current constant current multiply each other and draw the constant current weighing computation results.Again said constant voltage weighing computation results and constant current weighing computation results are passed through adder 503 computings, obtain switching synthetic result transmission and give said driving pulse generation unit 204.
Step S5, the synthetic result of the said switching that said driving pulse generation unit 204 will receive generates driving pulse, thereby drives the device for power switching in the numerical control charge power supply.
In said step S4; When said numerical control charge power supply under the constant voltage state of a control; As shown in Figure 7, be said voltage weight coefficient m under the constant voltage state of a control and said electric current weighting coefficient n change curve, as can be seen from the figure; Said voltage weight coefficient m numerical value remains " 1 ", and said electric current weighting coefficient n numerical value remains " 0 ".In this state, constant voltage weighing computation results described in the synthetic control unit of switching shown in Figure 5 numerically waits the constant voltage that the is set forth in control result of institute, and said constant current weighing computation results is " 0 ".Said constant voltage weighing computation results and said constant current weighing computation results are through after adder 503 computings; Obtain switching synthetic result, numerically also just equal said constant voltage control result, promptly final effect does; Constant voltage control result gets into driving pulse generation unit 204, generates driving pulse.Said numerical control charge power supply that hence one can see that can realize the control purpose by switching synthetic control unit 203 fully under said constant voltage Control work state.
When said numerical control charge power supply in the constant voltage state of a control in constant current state of a control handoff procedure; Said voltage weight coefficient m and said electric current weighting coefficient n change curve are shown in 8; The initial value of said voltage weight coefficient m is " 1 "; And the initial value of said electric current weighting coefficient n is " 0 ", and this moment, said numerical control charge power supply was operated under the constant voltage Control work state as shown in Figure 7.By initial time rise to switching time t during this period of time in; The numerical value of said voltage weight coefficient m progressively is changed to " 0 " with fixed slope by " 1 "; And the numerical value of said electric current weighting coefficient n progressively is changed to " 1 " with identical fixed slope by " 0 ", and the weight coefficient m of voltage described in the change procedure and said electric current weighting coefficient n at any time both sums be " 1 ".In switching time, the constant voltage control result's in the synthetic result's of said switching the numerical value weight reduces gradually at this section, and constant current control result's weight increases gradually.Actual control effect does, the shared weight of constant voltage control result smoothly reduces in the driving pulse that driving pulse generation unit 204 generates, and the shared weight of constant current control result smoothly increases.After arriving t switching time; Said voltage weight coefficient m numerical value reaches " 0 ", and said electric current weighting coefficient n numerical value reaches " 1 ", and this moment, said numerical control charge power supply was operated under the constant current Control work state as shown in Figure 9; Accomplish of the switching of said constant voltage state of a control to said constant current state of a control; In the whole handoff procedure, the synthetic result of said switching jumping phenomenon can not occur, can guarantee that whole handoff procedure seamlessly transits.
Fig. 9 is said voltage weight coefficient m and said electric current weighting coefficient n change curve under the constant current state of a control; As can be seen from the figure; Said numerical control charge power supply is under the constant current state of a control; Said voltage weight coefficient m numerical value remains " 0 ", and said electric current weighting coefficient n numerical value remains " 1 ".In this state, the constant voltage weighted results is " 0 " described in the synthetic control unit of switching shown in Figure 5, and said constant current weighted results is numerically equal to said constant current control result.Said constant voltage weighted results and said constant current weighting meter are through after adder 503 computings; Obtain switching synthetic result and numerically also just equal said constant current control result; Be that final effect does; Said constant current control result gets into said driving pulse generation unit 204, generates driving pulse, thereby reaches the control purpose.Hence one can see that in said numerical control charge power supply under constant current Control work state, can realize the control purposes by switching synthetic control unit 203 fully.
When said numerical control charge power supply in the constant current state of a control in constant voltage state of a control handoff procedure; Shown in figure 10; For the constant current state of a control toward voltage weight coefficient m described in the constant voltage state of a control handoff procedure and said electric current weighting coefficient n change curve, as can be seen from the figure, the initial value of said voltage weight coefficient m is " 0 "; And the initial value of said electric current weighting coefficient n is " 1 ", and this moment, said numerical control charge power supply was operated under the constant current Control work state as shown in Figure 9.By initial time rise to switching time t during this period of time in; The numerical value of said voltage weight coefficient m progressively is changed to " 1 " with fixed slope by " 0 "; And the numerical value of said electric current weighting coefficient n progressively is changed to " 0 " with identical fixed slope by " 1 ", and the weight coefficient m of voltage described in the change procedure and said electric current weighting coefficient n at any time both sums be " 1 ".In switching time, the said constant voltage control result's in the synthetic result's of said switching the numerical value weight increases gradually at this section, and said constant current control result's weight reduces gradually.Actual control effect does, the shared weight of constant voltage control result smoothly increases described in the driving pulse that said driving pulse generation unit 204 generates, and the shared weight of said constant current control result smoothly reduces.After arriving t switching time; Said voltage weight coefficient m numerical value reaches " 1 ", and said electric current weighting coefficient n numerical value reaches " 0 ", and this moment, said numerical control charge power supply was operated under the constant voltage Control work state as shown in Figure 7; Accomplish of the switching of constant current state of a control toward the constant voltage state of a control; In the whole handoff procedure, the synthetic result of said switching jumping phenomenon can not occur, can guarantee that whole handoff procedure seamlessly transits.
Embodiment 2
The seamless switching device of constant voltage control and constant current control in a kind of charge power supply as shown in Figure 2 comprises:
Constant voltage control unit 201 is controlled in order to constant voltage; Constant current control unit 202 is used for constant current control; Said constant voltage control unit 201 is given respectively with said constant current control unit 202 and is switched synthetic control unit 203 output constant voltage control results and constant current control result;
The synthetic control unit 203 of said switching comprises: voltage, current detection module 301; Weight coefficient control module 303; Memory module 302 is synthesized computing module 304 with switching; Wherein, said voltage, current detection module 301 are used for detecting the current voltage and current numerical value of charge power supply, and said current voltage and current numerical value is transferred to said weight coefficient control module 303; Said memory module 302 was used for storage voltage weight coefficient m and electric current weighting coefficient n current time m (t) and the n (t) and the numerical value m (t-1) and the n (t-1) in a lasted moment and said voltage weight coefficient m and the variation delta m in electric current weighting coefficient each cycle of n and Δ n; Said weight coefficient control module 303 as shown in Figure 4 comprises: current charged state judgment sub-unit module 401 is used for judging the current charged state of said charge power supply according to the said current voltage, the current values that receive; Weight coefficient computation subunit module 402; Be used for from said memory module 302, extracting said voltage weight coefficient m and electric current weighting coefficient n last numerical value m (t-1) and n (t-1) constantly; According to said current charged state; Progressively increase or reduce voltage weight coefficient m, the while progressively reduces accordingly or increases electric current weighting coefficient n, calculates current time voltage weight coefficient m (t) and current time electric current weighting coefficient n (t) and deposits it in said memory module 302; Computing module 304 is synthesized in said switching; Be used for current constant voltage control result and said current time voltage weight coefficient m (t) multiplied each other and draw the constant voltage weighing computation results; Current constant current control result and said current time electric current weighting coefficient n (t) multiplied each other draw the constant current weighing computation results; Again said constant voltage weighing computation results and constant current weighing computation results are passed through the adder computing, obtain switching synthetic result;
Driving pulse generation unit 204, the result is synthesized in the switching that receives synthetic computing module 304 outputs of said switching, generates driving pulse and drives the power device in the numerical control charge power supply.
The characteristic of as above describing and/or illustrating to a kind of embodiment can be used in one or more other embodiment with identical or similar mode, and/or combines or the characteristic that substitutes among other embodiment is used with characteristic among other embodiment.
Should stress that term " comprises/comprise " existence that when this paper uses, refers to characteristic, whole, step or assembly, but not get rid of the existence of one or more further feature, whole, step, assembly or its combination or additional.
The above apparatus and method of the present invention can be realized by hardware, also can be realized by combination of hardware software.The present invention relates to such computer-readable program, when this program is performed by logical block, can make this logical block realize device or component parts mentioned above, or make this logical block realize the whole bag of tricks or step mentioned above.
Many feature and advantage of these embodiment are clearly according to this detailed description, so accompanying claims is intended to cover all these feature and advantage in its true spirit and the scope that fall into of these embodiment.In addition, owing to those skilled in the art will find apparent that a lot of modifications and change, not will embodiments of the invention be limited to the precision architecture and the operation of institute's illustration and description therefore, but can contain all suitable modifications and the equivalent that falls in its scope.
Claims (8)
1. the seamless handover method that constant voltage control and constant current are controlled in the charge power supply is characterized in that comprising the steps:
One voltage, current detection module detect the current voltage and current numerical value of charge power supply, and said current voltage and current numerical value is transferred to a weight coefficient control module;
One current charged state judgment sub-unit module of said weight coefficient control module is judged the current charged state of said charge power supply according to the said current voltage, the current values that receive; One weight coefficient computation subunit module of said weight coefficient control module; From a memory module, extract voltage weight coefficient m and electric current weighting coefficient n last numerical value m (t-1) and n (t-1) and said voltage weight coefficient m and the variation delta m in electric current weighting coefficient each cycle of n and Δ n constantly; According to said current charged state; Keeping said voltage weight coefficient m and sum of the two consistent with electric current weighting coefficient n rate of change is under 1 the situation at any time; Progressively increase or reduce voltage weight coefficient m; While progressively reduces or increases electric current weighting coefficient n, calculates current time voltage weight coefficient m (t) and current time electric current weighting coefficient n (t) and deposits it in said memory module;
Current constant voltage control result and said current time voltage weight coefficient m (t) multiplied each other draw the constant voltage weighing computation results; Current constant current control result and said current time electric current weighting coefficient n (t) multiplied each other draw the constant current weighing computation results; Again said constant voltage weighing computation results and constant current weighing computation results are passed through the adder computing, obtain switching synthetic result;
Synthetic result exports to a driving pulse generation unit with said switching, drives the device for power switching in the numerical control charge power supply thereby generate driving pulse.
2. seamless handover method according to claim 1; It is characterized in that when said voltage, current detection module detect the constant and voltage of the charging current of said charge power supply less than certain thresholding; Current charged state judgment sub-unit module confirms that the current state of said charge power supply is a constant current state; This moment m=0, n=1.
3. seamless handover method according to claim 2; It is characterized in that under said constant current state; If the voltage that detects said charge power supply is during greater than certain thresholding; The current state of then confirming said charge power supply is that constant current state is switched to pressure constant state, and then m progressively increases to 1 by 0, at this moment m (t)=m (t-1)+Δ m; It is 0 that while n gradually reduces by 1, at this moment n (t)=n (t-1)-Δ n.
4. seamless handover method according to claim 1; It is characterized in that when said voltage, current detection module detect the constant and electric current of said charge power supply charging voltage less than certain thresholding; Current charged state judgment sub-unit module confirms that the current state of said charge power supply is a pressure constant state; This moment m=1, n=0.
5. seamless handover method according to claim 4; It is characterized in that under said pressure constant state; If the electric current that detects said charge power supply is during greater than certain thresholding; The current state of confirming said charge power supply is that pressure constant state switches to constant current state, and then to gradually reduce by 1 be 0 to m, this moment m (t)=m (t-1)-Δ m; N progressively increases to 1 by 0 simultaneously, at this moment n (t)=n (t-1)+Δ n.
6. according to the described seamless handover method of claim 1-5, it is characterized in that the variation delta m=Δ n=in said voltage weight coefficient m and electric current weighting coefficient each cycle of n switches duration/control cycle.
7. the seamless switching device of constant voltage control and constant current control in the charge power supply comprises: a constant voltage control unit is used for constant voltage control, and produces constant voltage and control the result; One constant current control unit is used for constant current control, and produces constant current control result; The driving pulse generation unit drives the device for power switching in the numerical control charge power supply with generating driving pulse; It is characterized in that also comprising that one switches synthetic control unit, be used for said constant voltage control result and constant current control result are switched the synthetic said driving pulse generation unit of exporting to;
The synthetic control unit of said switching comprises: a voltage, current detection module, and a weight coefficient control module, a memory module and is switched synthetic computing module; Wherein,
Said voltage, current detection module are used for detecting the current voltage and current numerical value of charge power supply, and said current voltage and current numerical value is transferred to said weight coefficient control module;
Said memory module was used for storage voltage weight coefficient m and electric current weighting coefficient n current time m (t) and the n (t) and the numerical value m (t-1) and the n (t-1) in a lasted moment and said voltage weight coefficient m and the variation delta m in electric current weighting coefficient each cycle of n and Δ n;
Said weight coefficient control module comprises a current charged state judgment sub-unit module, is used for judging the current charged state of said charge power supply according to the said current voltage, the current values that receive; One weight coefficient computation subunit module; Be used for from said memory module, extracting said voltage weight coefficient m and electric current weighting coefficient n last numerical value m (t-1) and n (t-1) constantly; According to said current charged state; Progressively increase or reduce voltage weight coefficient m, the while progressively reduces accordingly or increases electric current weighting coefficient n, calculates current time voltage weight coefficient m (t) and current time electric current weighting coefficient n (t) and deposits it in said memory module;
Computing module is synthesized in said switching; Be used for current constant voltage control result and said current time voltage weight coefficient m (t) multiplied each other and draw the constant voltage weighing computation results; Current constant current control result and said current time electric current weighting coefficient n (t) multiplied each other draw the constant current weighing computation results; Again said constant voltage weighing computation results and constant current weighing computation results are passed through the adder computing, obtain switching synthetic result;
Said driving pulse generation unit receives the synthetic result of switching of the synthetic computing module output of said switching, generates driving pulse and drives the device for power switching in the numerical control charge power supply.
8. switching device shifter according to claim 7; It is characterized in that said switching synthesis module comprises multiplier and adder; Said constant voltage control result and said voltage weight coefficient draw said constant voltage weighted results through the multiplier computing; Said constant current control result and said electric current weighting coefficient draw said constant current weighted results through the multiplier computing, and said constant voltage weighted results and said constant current weighted results obtain switching synthetic result transmission through adder and give said driving pulse generation module.
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| CN110670086A (en) * | 2019-09-12 | 2020-01-10 | 佛山顺德歌林美电子产品有限公司 | Constant-pressure constant-current method of electronic-sieve fresh-keeping device |
| CN111244932A (en) * | 2020-02-24 | 2020-06-05 | 国网江苏省电力有限公司 | Energy storage multi-working-condition operation control method and device for energy router |
| CN114189007A (en) * | 2021-11-15 | 2022-03-15 | 阳光电源股份有限公司 | Vehicle-mounted charger working mode switching control method and device and vehicle-mounted charger |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110670086A (en) * | 2019-09-12 | 2020-01-10 | 佛山顺德歌林美电子产品有限公司 | Constant-pressure constant-current method of electronic-sieve fresh-keeping device |
| CN110670086B (en) * | 2019-09-12 | 2023-10-24 | 佛山顺德歌林美电子产品有限公司 | Constant-pressure constant-current method of electronic sieve fresh-keeping device |
| CN111244932A (en) * | 2020-02-24 | 2020-06-05 | 国网江苏省电力有限公司 | Energy storage multi-working-condition operation control method and device for energy router |
| CN111244932B (en) * | 2020-02-24 | 2021-07-06 | 国网江苏省电力有限公司 | Energy storage multi-working-condition operation control method and device for energy router |
| CN114189007A (en) * | 2021-11-15 | 2022-03-15 | 阳光电源股份有限公司 | Vehicle-mounted charger working mode switching control method and device and vehicle-mounted charger |
| CN114189007B (en) * | 2021-11-15 | 2024-04-12 | 阳光电源股份有限公司 | Vehicle-mounted charger working mode switching control method and device and vehicle-mounted charger |
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Application publication date: 20121017 |