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 invention relates to a digital control charging power supply, in particular to a seamless switching method between constant voltage control and constant current control in a numerical control charging power supply.
Background
The storage battery charging power supply needs to perform accurate constant voltage control and constant current control, but the switching between the constant voltage control state and the constant current control state is a problem which is not well solved all the time. Wujin, Huangjingsheng, XiLing Han, Lexuanming, Chengtao in the electronic device 2008 5, in the article "design of linear charging control system for lithium ion battery", a method for automatically switching between constant voltage control and constant current control is disclosed. The method comprises the steps of firstly detecting the voltage range of the battery after the battery is powered on, adopting trickle charging when the voltage of the battery is less than 2.9V, and otherwise, starting constant-current charging. In the trickle charging process, the battery voltage is slowly increased, when the battery voltage is detected to rise to be more than 2.9V, the constant-current charging is carried out, the battery is charged at a set constant current, and the battery voltage is increased at a higher rate. When the voltage is charged to be close to 4.2V, the constant current charging is finished. Then, the charge was carried out at a constant voltage of 4.2V, and the voltage was almost constant during the constant voltage charge, and the charge current was continuously decreased. When the current drops to 1/10, which is the rated constant current charging current, the battery is fully charged and the charging is terminated. The system continuously monitors the battery voltage after the charge is terminated and when the battery voltage drops to 4.05V, the charge cycle is restarted.
On one hand, when the method switches between the constant voltage control and the constant current control, the constant voltage control result directly jumps to the constant current control result, or the constant current control result directly jumps to the constant voltage control result, and the method is a hard switching process instead of a smooth transition process, so that the charging voltage or current jumps. On the other hand, when the load state of the charging power supply is at the switching critical point, frequent switching between constant voltage control and constant current control occurs, and oscillation occurs in severe cases, which affects the charging effect and the service life of the battery.
Disclosure of Invention
In view of the above disadvantages, the present invention provides a seamless switching method and device for constant voltage control and constant current control in a charging power supply, which can effectively solve the problems of charging voltage or current jump and frequent switching between constant voltage control and constant current control.
The technical solution of the invention is as follows:
a seamless switching method for constant voltage control and constant current control in a charging power supply comprises the following steps:
a voltage and current detection module detects the current voltage and current values of the charging power supply and transmits the current voltage and current values to a weighting coefficient control module;
a current charging state judging subunit module of the weighting coefficient control module judges the current charging state of the charging power supply according to the received current voltage and current values; a weighting coefficient calculation subunit module of the weighting coefficient control module extracts a voltage weighting coefficient m and a current weighting coefficient n from a storage module, and under the condition that the change rates of the voltage weighting coefficient m and the current weighting coefficient n are kept consistent and the sum of the change rates of the voltage weighting coefficient m and the current weighting coefficient n is 1 at any time, the voltage weighting coefficient m is gradually increased or decreased, the current weighting coefficient n is gradually decreased or increased, the current voltage weighting coefficient m (t) and the current weighting coefficient n (t) are calculated and stored in the storage module;
multiplying the current constant voltage control result by the current time voltage weighting coefficient m (t) to obtain a constant voltage weighting calculation result, multiplying the current constant current control result by the current time current weighting coefficient n (t) to obtain a constant current weighting calculation result, and calculating the constant voltage weighting calculation result and the constant current weighting calculation result through an adder to obtain a switching synthesis result;
and outputting the switching synthesis result to a driving pulse generation unit to generate a driving pulse so as to drive a power switch device in the numerical control charging power supply.
When the voltage and current detection module detects that the charging current of the charging power supply is constant and the voltage is smaller than a certain threshold value, the current charging state judgment subunit module determines that the current state of the charging power supply is a constant current state, wherein m is 0, and n is 1.
In the constant current state, if the voltage of the charging power supply is detected to be greater than a certain threshold value, determining that the current state of the charging power supply is switched from the constant current state to the constant voltage state, and gradually increasing m from 0 to 1, wherein m (t) is m (t-1) + Δ m; and n is gradually reduced from 1 to 0, so that n (t) is n (t-1) - Δ n.
When the voltage and current detection module detects that the charging voltage of the charging power supply is constant and the current is smaller than a certain threshold value, the current charging state judgment subunit module determines that the current state of the charging power supply is a constant voltage state, wherein m is 1, and n is 0.
In the constant voltage state, if the current of the charging power supply is detected to be larger than a certain threshold value, the current state of the charging power supply is determined to be the switching from the constant voltage state to the constant current state, m is gradually reduced from 1 to 0, and at the moment, m (t) -m (t-1) - Δ m; and n is gradually increased from 0 to 1, wherein n (t) is n (t-1) + Δ n.
The voltage weighting factor m and the current weighting factor n have a variation Δ m ═ Δ n ═ switching duration/control period per period.
A seamless switching device for constant voltage control and constant current control in a charging power supply comprises: a constant voltage control unit for constant voltage control and generating a constant voltage control result; the constant current control unit is used for constant current control and generating a constant current control result; the driving pulse generating unit is used for generating driving pulses to drive a power switch device in the numerical control charging power supply; the constant-current driving circuit is characterized by also comprising a switching and synthesizing control unit which is used for switching, synthesizing and outputting the constant-voltage control result and the constant-current control result to the driving pulse generating unit;
the switching composition control unit includes: the device comprises a voltage and current detection module, a weighting coefficient control module, a storage module and a switching synthesis calculation module; wherein,
the voltage and current detection module is used for detecting the current voltage and current values of the charging power supply and transmitting the current voltage and current values to the weighting coefficient control module;
the storage module is used for storing the voltage weighting coefficient m and the current weighting coefficient n, values m (t) and n (t-1) of the current moment m (t) and n (t) and the previous moment n (t-1), and variation delta m and delta n of the voltage weighting coefficient m and the current weighting coefficient n in each period;
the weighting coefficient control module comprises a current charging state judgment subunit module used for judging the current charging state of the charging power supply according to the received current voltage and current values; a weighting coefficient calculation subunit module, configured to extract a time value m (t-1) and a time value n (t-1) of the voltage weighting coefficient m and the current weighting coefficient n from the storage module, gradually increase or decrease the voltage weighting coefficient m according to the current charging state, and simultaneously gradually decrease or increase the current weighting coefficient n, calculate a current time voltage weighting coefficient m (t) and a current time current weighting coefficient n (t), and store the current time voltage weighting coefficient m (t) and the current time current weighting coefficient n (t) in the storage module;
the switching synthesis calculation module is used for multiplying the current constant voltage control result by the current time voltage weighting coefficient m (t) to obtain a constant voltage weighting calculation result, multiplying the current constant current control result by the current time current weighting coefficient n (t) to obtain a constant current weighting calculation result, and then calculating the constant voltage weighting calculation result and the constant current weighting calculation result through an adder to obtain a switching synthesis result;
and the driving pulse generating unit receives the switching and synthesizing result output by the switching and synthesizing calculation module and generates a driving pulse to drive a power switch device in the numerical control charging power supply.
The switching synthesis module comprises a multiplier and an adder, the constant voltage control result and the voltage weighting coefficient are calculated through the multiplier to obtain the constant voltage weighting result, the constant current control result and the current weighting coefficient are calculated through the multiplier to obtain the constant current weighting result, and the constant voltage weighting result and the constant current weighting result are converted through the adder to obtain a switching synthesis result and are transmitted to the driving pulse generation module.
The charging power supply is mainly a numerical control charging power supply.
Advantageous effects
According to the invention, by adding a switching synthesis control unit in the control of the charging power supply, when the charging power supply needs to be switched from a constant voltage state to a constant current state or from the constant current state to the constant voltage state, the proportion of the voltage and current weighting coefficients in the switching synthesis result is controlled by the weighting coefficient control module, so that the switching synthesis result generates a driving pulse for controlling the charging power supply, the smooth seamless transition of the switching process is realized, the oscillation phenomenon can be completely avoided, and the stability of the charging process is ensured.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a flow chart of a seamless switching method for constant voltage control and constant current control in a charging power supply; ......
FIG. 2 is a schematic diagram of a seamless switching device for constant voltage control and constant current control in a charging power supply;
FIG. 3 is a diagram showing a configuration of a switching combination control unit;
FIG. 4 is a view showing a weight coefficient control block;
FIG. 5 is a diagram of a switched composite computing module;
FIG. 6 is a flowchart of the weighting factor control module operation;
FIG. 7 is a graph showing the variation of the voltage weighting factor m and the current weighting factor n under the constant voltage control;
fig. 8 is a graph showing the variation of the voltage weighting coefficient m and the current weighting coefficient n in the process of switching from the constant voltage control state to the constant current control state;
fig. 9 is a graph showing the variation of the voltage weighting coefficient m and the current weighting coefficient n in the constant current control state;
FIG. 10 is a graph showing the variation of the voltage weighting factor m and the current weighting factor n during the switching from the constant current control state to the constant voltage control state
Detailed Description
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the following description, for purposes of explanation and not limitation, specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details.
It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the device structures and/or processing steps that are closely related to the scheme according to the present invention are shown in the drawings, and other details that are not so relevant to the present invention are omitted.
Embodiments of the present invention will be described below with reference to the drawings.
Example 1
As shown in fig. 1, a flowchart of a seamless switching method of constant voltage control and constant current control in a charging power supply, in step S1, a voltage and current detection module 301 detects the current charging power supply voltage and current values and transmits the current and voltage values to a weighting factor control module 303. In step S2, the current charging state determining subunit module 401 of the weighting factor control module 303 determines the current charging state of the charging power supply according to the received current voltage and current values. In step S3, a weighting factor calculating subunit module 402 of the weighting factor control module 303 extracts the time values m (t-1) and n (t-1) of the voltage weighting factor m and the current weighting factor n and the variation Δ m and Δ n of the voltage weighting factor m and the current weighting factor n per cycle from the storage module 302, and calculates the current time voltage weighting factor m (t) and the current time current weighting factor n (t) according to the current charging state. In the above steps S2 and S3, the specific process of determining the current state of charge and calculating the weighting factor is as follows:
as shown in the flowchart of current state determination and m, n calculation in fig. 5, when the voltage and current detection module 301 detects that the charging current of the charging power supply is constant and the voltage is less than a certain threshold (1.1 times of the rated voltage of the charged battery), the current charging state determination subunit module 401 determines that the current state of the charging power supply is a constant current state, where the voltage weighting coefficient m is 0 and the current weighting coefficient n is 1; in the constant current state, if the voltage of the charging power supply is detected to be greater than a certain threshold value (1.1 times of the rated voltage of the charged battery), the current state of the charging power supply is determined to be the switching from the constant current state to the constant voltage state, the voltage weighting coefficient m and the current weighting coefficient n are ensured to be at the same speed, and m is gradually increased from 0 to 1 under the condition that the sum of the voltage weighting coefficient m and the current weighting coefficient n is 1 at any time, wherein m (t) is m (t-1) + Δ m; and n is gradually reduced from 1 to 0, so that n (t) is n (t-1) - Δ n.
When the voltage and current detection module 301 detects that the charging voltage of the charging power supply is constant and the current is smaller than a certain threshold (0.1 times the volt-ampere number of the battery to be charged), the current charging state determination subunit module 401 determines that the current state of the charging power supply is a constant voltage state, where m is 1 and n is 0. Under the constant voltage state, if the current of the charging power supply is detected to be larger than a certain threshold value (0.1 times of the volt ampere number of the charged battery), the current state of the charging power supply is determined to be the switching from the constant voltage state to the constant current state, the voltage weighting coefficient m and the current weighting coefficient n are at the same speed, and m is gradually reduced from 1 to 0 under the condition that the sum of the voltage weighting coefficient m and the current weighting coefficient n is 1 at any time, wherein m (t) is m (t-1) - Δ m; and n is gradually increased from 0 to 1, wherein n (t) is n (t-1) + Δ n.
In two switching processes of switching the constant current state to the constant voltage state and switching the constant voltage state to the constant current state, a period of a variation Δ m of the voltage weighting coefficient m and a period of the current weighting coefficient n is a switching duration/a control period, in this embodiment, the switching duration is 1 second, and the control period is 50 microseconds. The weighting coefficient calculating subunit module 402 transmits the calculated current values m (t) and n (t) to the storage module 302.
In step S4, the switching combination control unit 203 multiplies the current constant voltage control result by the current time voltage weighting coefficient m (t) to obtain a constant voltage weighting calculation result, and multiplies the current constant current control result by the current time current weighting coefficient n (t) to obtain a constant current weighting calculation result. The constant voltage weighting calculation result and the constant current weighting calculation result are calculated by an adder 503 to obtain a switching combination result, and the switching combination result is transmitted to the driving pulse generating unit 204.
In step S5, the driving pulse generating unit 204 generates a driving pulse from the received switching combination result, so as to drive a power switching device in the digitally controlled charging power supply.
In the step S4, when the digitally controlled charging power supply is in the constant voltage control state, as shown in fig. 7, the voltage weighting factor m and the current weighting factor n are plotted in the constant voltage control state, and it can be seen from the graph that the value of the voltage weighting factor m is always kept at "1" and the value of the current weighting factor n is always kept at "0". In this state, the constant voltage weight calculation result is numerically equal to the constant voltage control result, and the constant current weight calculation result is "0" in the switching combination control unit shown in fig. 5. The constant voltage weighting calculation result and the constant current weighting calculation result are calculated by the adder 503 to obtain a switching combination result, which is numerically equal to the constant voltage control result, i.e. the final effect is that the constant voltage control result enters the driving pulse generating unit 204 to generate the driving pulse. Therefore, the numerical control charging power supply can completely realize the control purpose by the switching and synthesizing control unit 203 under the working state of the constant voltage control.
When the numerical control charging power supply is switched from the constant voltage control state to the constant current control state, the change curve of the voltage weighting coefficient m and the current weighting coefficient n is shown as 8, the initial value of the voltage weighting coefficient m is "1", the initial value of the current weighting coefficient n is "0", and at this time, the numerical control charging power supply works in the constant voltage control working state shown in fig. 7. During the period from the initial time to the switching time t, the value of the voltage weighting coefficient m is gradually changed from "1" to "0" with a fixed slope, the value of the current weighting coefficient n is gradually changed from "0" to "1" with the same fixed slope, and the sum of the voltage weighting coefficient m and the current weighting coefficient n is "1" at any time during the change. In this switching time, the weight of the constant-voltage control result in the value of the switching composite result gradually decreases, and the weight of the constant-current control result gradually increases. The actual control effect is that the weight occupied by the constant voltage control result in the drive pulse generated by the drive pulse generating unit 204 is smoothly decreased, and the weight occupied by the constant current control result is smoothly increased. When the switching time t is reached, the value of the voltage weighting coefficient m reaches "0", and the value of the current weighting coefficient n reaches "1", at this time, the numerical control charging power supply works in the constant current control working state as shown in fig. 9, the switching from the constant voltage control state to the constant current control state is completed, in the whole switching process, the switching synthetic result does not generate a sudden change phenomenon, and the smooth transition of the whole switching process can be ensured.
Fig. 9 is a graph showing the variation of the voltage weighting factor m and the current weighting factor n under the constant current control state, and it can be seen from the graph that the numerical value of the voltage weighting factor m is always kept at "0" and the numerical value of the current weighting factor n is always kept at "1" under the constant current control state of the numerical control charging power supply. In this state, the constant-voltage weighting result is "0" in the switching combination control unit shown in fig. 5, and the constant-current weighting result is numerically equal to the constant-current control result. After the constant voltage weighting result and the constant current weighting meter are operated by the adder 503, the obtained switching combination result is also equal to the constant current control result in terms of value, that is, the final effect is that the constant current control result enters the driving pulse generating unit 204 to generate driving pulses, thereby achieving the purpose of control. Therefore, the purpose of control can be completely realized by the switching and synthesizing control unit 203 under the working state of constant current control of the numerical control charging power supply.
When the numerical control charging power supply is switched from the constant current control state to the constant voltage control state, as shown in fig. 10, it is a graph showing the change of the voltage weighting coefficient m and the current weighting coefficient n in the switching process from the constant current control state to the constant voltage control state, as can be seen from the graph, the initial value of the voltage weighting coefficient m is "0", and the initial value of the current weighting coefficient n is "1", at this time, the numerical control charging power supply operates in the constant current control operating state shown in fig. 9. During the period from the initial time to the switching time t, the value of the voltage weighting coefficient m is gradually changed from "0" to "1" with a fixed slope, the value of the current weighting coefficient n is gradually changed from "1" to "0" with the same fixed slope, and the sum of the voltage weighting coefficient m and the current weighting coefficient n is "1" at any time during the change. In this switching time, the weight of the constant-voltage control result in the value of the switching composite result gradually increases, and the weight of the constant-current control result gradually decreases. The actual control effect is that the weight occupied by the constant voltage control result in the driving pulse generated by the driving pulse generating unit 204 is smoothly increased, and the weight occupied by the constant current control result is smoothly decreased. When the switching time t is reached, the value of the voltage weighting coefficient m reaches "1", and the value of the current weighting coefficient n reaches "0", at this time, the numerical control charging power supply works in the constant voltage control working state as shown in fig. 7, the switching from the constant current control state to the constant voltage control state is completed, in the whole switching process, the switching synthetic result does not generate a sudden change phenomenon, and the smooth transition of the whole switching process can be ensured.
Example 2
A seamless switching apparatus of constant voltage control and constant current control in a charging power supply as shown in fig. 2, comprising:
a constant voltage control unit 201 for constant voltage control; a constant current control unit 202 for constant current control; the constant voltage control unit 201 and the constant current control unit 202 respectively output a constant voltage control result and a constant current control result to the switching combination control unit 203;
the switching combination control unit 203 includes: the device comprises a voltage and current detection module 301, a weighting coefficient control module 303, a storage module 302 and a switching combination calculation module 304, wherein the voltage and current detection module 301 is used for detecting the current voltage and current values of the charging power supply and transmitting the current voltage and current values to the weighting coefficient control module 303; the storage module 302 is configured to store voltage weighting coefficients m and current weighting coefficients n, values m (t) and n (t-1) of current time m (t) and n (t) and previous time n (t-1), and variation Δ m and Δ n of the voltage weighting coefficients m and the current weighting coefficients n in each period; as shown in fig. 4, the weighting factor control module 303 includes: a current charging state determining subunit module 401, configured to determine a current charging state of the charging power supply according to the received current voltage and current values; a weighting coefficient calculation subunit module 402, configured to extract time values m (t-1) and n (t-1) of the voltage weighting coefficient m and the current weighting coefficient n from the storage module 302, gradually increase or decrease the voltage weighting coefficient m according to the current charging state, and simultaneously gradually decrease or increase the current weighting coefficient n, calculate a current time voltage weighting coefficient m (t) and a current time current weighting coefficient n (t), and store the current time voltage weighting coefficient m (t) and the current time current weighting coefficient n (t) in the storage module 302; the switching synthesis calculation module 304 is configured to multiply the current constant voltage control result by the current time voltage weighting coefficient m (t) to obtain a constant voltage weighting calculation result, multiply the current constant current control result by the current time current weighting coefficient n (t) to obtain a constant current weighting calculation result, and calculate the constant voltage weighting calculation result and the constant current weighting calculation result by an adder to obtain a switching synthesis result;
and the driving pulse generating unit 204 receives the switching combination result output by the switching combination calculating module 304, and generates a driving pulse to drive a power device in the numerical control charging power supply.
Features that are described and/or illustrated above with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments and/or in combination with or instead of the features of the other embodiments.
It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps, components or groups thereof.
The above devices and methods of the present invention can be implemented by hardware, or can be implemented by hardware and software. The present invention relates to a computer-readable program which, when executed by a logic section, enables the logic section to realize the above-described apparatus or constituent section, or to realize the above-described various methods or steps.
The many features and advantages of these embodiments are apparent from the detailed specification, and thus, it is intended by the appended claims to cover all such features and advantages of these embodiments which fall within the true spirit and scope thereof. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the embodiments of the invention to the exact construction and operation illustrated and described, and accordingly, all suitable modifications and equivalents may be resorted to, falling within the scope thereof.
Claims (8)
1. A seamless switching method of constant voltage control and constant current control in a charging power supply is characterized by comprising the following steps:
a voltage and current detection module detects the current voltage and current values of the charging power supply and transmits the current voltage and current values to a weighting coefficient control module;
a current charging state judging subunit module of the weighting coefficient control module judges the current charging state of the charging power supply according to the received current voltage and current values; a weighting coefficient calculation subunit module of the weighting coefficient control module extracts a voltage weighting coefficient m and a current weighting coefficient n from a storage module, and under the condition that the change rates of the voltage weighting coefficient m and the current weighting coefficient n are kept consistent and the sum of the change rates of the voltage weighting coefficient m and the current weighting coefficient n is 1 at any time, the voltage weighting coefficient m is gradually increased or decreased, the current weighting coefficient n is gradually decreased or increased, the current voltage weighting coefficient m (t) and the current weighting coefficient n (t) are calculated and stored in the storage module;
multiplying the current constant voltage control result by the current time voltage weighting coefficient m (t) to obtain a constant voltage weighting calculation result, multiplying the current constant current control result by the current time current weighting coefficient n (t) to obtain a constant current weighting calculation result, and calculating the constant voltage weighting calculation result and the constant current weighting calculation result through an adder to obtain a switching synthesis result;
and outputting the switching synthesis result to a driving pulse generation unit to generate a driving pulse so as to drive a power switch device in the numerical control charging power supply.
2. The seamless switching method according to claim 1, wherein when the voltage and current detection module detects that the charging current of the charging power supply is constant and the voltage is less than a certain threshold, the current charging status determination subunit module determines that the current status of the charging power supply is a constant current status, where m is 0 and n is 1.
3. The seamless switching method according to claim 2, wherein in the constant current state, if it is detected that the voltage of the charging power supply is greater than a certain threshold, it is determined that the current state of the charging power supply is a switching from the constant current state to the constant voltage state, and m is increased from 0 to 1, where m (t) ═ m (t-1) + Δ m; and n is gradually reduced from 1 to 0, so that n (t) is n (t-1) - Δ n.
4. The seamless switching method according to claim 1, wherein when the voltage and current detecting module detects that the charging voltage of the charging source is constant and the current is smaller than a threshold, the current charging status determining subunit module determines that the current status of the charging source is a constant voltage status, where m is 1 and n is 0.
5. The seamless switching method according to claim 4, wherein in the constant voltage state, if it is determined that the current state of the charging power supply is the constant voltage state to switch to the constant current state when the current of the charging power supply is detected to be greater than a certain threshold value, m is gradually decreased from 1 to 0, where m (t) ═ m (t-1) - Δ m; and n is gradually increased from 0 to 1, wherein n (t) is n (t-1) + Δ n.
6. The seamless switching method according to claims 1-5, characterized in that the voltage weighting factor m and the current weighting factor n vary by Δ m- Δ n-switching duration/control period per period.
7. A seamless switching device for constant voltage control and constant current control in a charging power supply comprises: a constant voltage control unit for constant voltage control and generating a constant voltage control result; the constant current control unit is used for constant current control and generating a constant current control result; the driving pulse generating unit is used for generating driving pulses to drive a power switch device in the numerical control charging power supply; the constant-current driving circuit is characterized by also comprising a switching and synthesizing control unit which is used for switching, synthesizing and outputting the constant-voltage control result and the constant-current control result to the driving pulse generating unit;
the switching composition control unit includes: the device comprises a voltage and current detection module, a weighting coefficient control module, a storage module and a switching synthesis calculation module; wherein,
the voltage and current detection module is used for detecting the current voltage and current values of the charging power supply and transmitting the current voltage and current values to the weighting coefficient control module;
the storage module is used for storing the voltage weighting coefficient m and the current weighting coefficient n, values m (t) and n (t-1) of the current moment m (t) and n (t) and the previous moment n (t-1), and variation delta m and delta n of the voltage weighting coefficient m and the current weighting coefficient n in each period;
the weighting coefficient control module comprises a current charging state judgment subunit module used for judging the current charging state of the charging power supply according to the received current voltage and current values; a weighting coefficient calculation subunit module, configured to extract a time value m (t-1) and a time value n (t-1) of the voltage weighting coefficient m and the current weighting coefficient n from the storage module, gradually increase or decrease the voltage weighting coefficient m according to the current charging state, and simultaneously gradually decrease or increase the current weighting coefficient n, calculate a current time voltage weighting coefficient m (t) and a current time current weighting coefficient n (t), and store the current time voltage weighting coefficient m (t) and the current time current weighting coefficient n (t) in the storage module;
the switching synthesis calculation module is used for multiplying the current constant voltage control result by the current time voltage weighting coefficient m (t) to obtain a constant voltage weighting calculation result, multiplying the current constant current control result by the current time current weighting coefficient n (t) to obtain a constant current weighting calculation result, and then calculating the constant voltage weighting calculation result and the constant current weighting calculation result through an adder to obtain a switching synthesis result;
and the driving pulse generating unit receives the switching and synthesizing result output by the switching and synthesizing calculation module and generates a driving pulse to drive a power switch device in the numerical control charging power supply.
8. The switching device according to claim 7, wherein the switching and combining module includes a multiplier and an adder, the constant voltage control result and the voltage weighting coefficient are calculated by the multiplier to obtain the constant voltage weighting result, the constant current control result and the current weighting coefficient are calculated by the multiplier to obtain the constant current weighting result, and the constant voltage weighting result and the constant current weighting result are converted by the adder to obtain a switching and combining result and are transmitted to the driving pulse generating module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101971742A CN102738863A (en) | 2012-06-15 | 2012-06-15 | Constant voltage control and constant current control seamlessly switching method in charging power source and device thereof |
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Cited By (3)
| 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 |
| 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 |
-
2012
- 2012-06-15 CN CN2012101971742A patent/CN102738863A/en active Pending
Non-Patent Citations (2)
| Title |
|---|
| 左燕: "多模型自适应控制及其在热工过程中的应用", 《中国优秀硕士学位论文全文数据库》 * |
| 陈琛: "便携式电子设备用多功能、多模式电池与电源管理芯片的研究与设计", 《中国优秀博士学位论文全文数据库》 * |
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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