CN215267677U - Charging circuit - Google Patents
Charging circuit Download PDFInfo
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- CN215267677U CN215267677U CN202023044214.9U CN202023044214U CN215267677U CN 215267677 U CN215267677 U CN 215267677U CN 202023044214 U CN202023044214 U CN 202023044214U CN 215267677 U CN215267677 U CN 215267677U
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Abstract
The utility model discloses a charging circuit, including charging source, electric energy storage module and the boost module of connection between charging source and electric energy storage module, wherein, the boost module can step up the voltage of charging source output to charge to electric energy storage module, in addition, be equipped with in the boost module and prevent anti-reverse diode, can prevent that electric energy storage module's electric current from flowing backward to charging source. Therefore, the charging circuit in the application boosts the voltage output by the charging power supply, the efficiency of charging the electric energy storage module is improved, the structure is simple, and the cost is low.
Description
Technical Field
The utility model relates to an electronic information field especially relates to a charging circuit.
Background
In the prior art, weak electric energy output by a charging power supply is generally collected and stored in an electric energy storage module, so that the electric energy storage module supplies power to low-power-consumption electronic equipment. In order to prevent the current of the electric energy storage module from flowing back to the charging power supply, an anti-reverse diode is usually disposed between the charging power supply and the electric energy storage module in the prior art, as shown in fig. 1, fig. 1 is a schematic structural diagram of a charging circuit in the prior art. In this way, the on and off of the anti-reverse diode is not easy to control, and when the voltage output by the charging power supply is low, the situation that the electric energy storage module cannot be charged exists due to the fact that the anti-reverse diode is cut off.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a charging circuit steps up through the voltage to charging source output, has promoted the efficiency of charging to electric energy storage module, and simple structure, and the cost is lower.
In order to solve the technical problem, the utility model provides a charging circuit, include:
a charging power supply for outputting a voltage;
the input positive end is connected with the output positive end of the charging power supply, the input negative end is connected with the output negative end of the charging power supply, the output positive end is connected with the input positive end of the electric energy storage module, the output negative end is connected with the input negative end of the electric energy storage module and is provided with a boosting module of an anti-reverse diode, and the boosting module is used for boosting the output voltage to charge the electric energy storage module;
the electric energy storage module is used for storing electric energy.
Preferably, the charging power supply is a solar photovoltaic panel.
Preferably, the charging power source is a generator.
Preferably, the electric energy storage module is a super capacitor.
Preferably, the boosting module includes:
the first end is an input positive end of the boosting module and is connected with an output positive end of the charging power supply, and the second end is an inductor which is connected with the input end of the anti-reverse diode and the first end of the switching tube and is used for storing electric energy output by the charging power supply when the switching tube is switched on and outputting the stored electric energy when the switching tube is switched off so as to boost the output voltage of the charging power supply and charge the electric energy storage module;
the anti-reverse diode is connected with the input positive end of the electric energy storage module and the output end of the boost module, and is used for being cut off when the switch tube is switched on and being switched on when the switch tube is switched off so as to switch on a circuit between the inductor and the electric energy storage module;
the control end of the switching tube is connected with the output end of the signal generator, the second end of the switching tube is connected with the input negative end of the boosting module and the output negative end of the charging power supply, is connected with the output negative end of the charging power supply and grounded, and is used for being switched on when a switching-on control signal sent by the signal generator is received and being switched off when a switching-off control signal sent by the signal generator is received;
the signal generator is used for outputting the switching-on control signal and the switching-off control signal based on the electric energy stored in the inductor.
Preferably, the number of the boosting modules is N, and the output phases of the N boosting modules sequentially differ by 360/N degrees.
Preferably, the signal generator is a signal generator, an output end of which is connected to control ends of switching tubes in the N boosting modules, and outputs the on-control signal and the off-control signal based on the electric energy stored in the inductor to control the switching tubes in the N boosting modules, so that output phases of the N boosting modules sequentially differ by 360/N degrees.
The application provides a charging circuit, including charging source, electric energy storage module and the boost module of connection between charging source and electric energy storage module, wherein, the boost module can step up the voltage of charging source output to charge to electric energy storage module, in addition, be equipped with in the boost module and prevent anti-diode, can prevent that electric energy storage module's electric current from flowing backward to charging source. Therefore, the charging circuit in the application boosts the voltage output by the charging power supply, the efficiency of charging the electric energy storage module is improved, the structure is simple, and the cost is low.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required in the prior art and the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic diagram of a charging circuit in the prior art;
fig. 2 is a schematic structural diagram of a charging circuit provided by the present invention;
fig. 3 is a schematic structural diagram of a specific charging circuit provided by the present invention;
fig. 4 is a waveform diagram of the charging circuit when charging the electric energy storage module.
Detailed Description
The core of the utility model is to provide a charging circuit, step up through the voltage to charging source output, promoted the efficiency of charging to electric energy storage module, and simple structure, the cost is lower.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a charging circuit according to the present invention.
The charging circuit includes:
a charging power supply 1 for outputting a voltage;
the input positive end is connected with the output positive end of the charging power supply 1, the input negative end is connected with the output negative end of the charging power supply 1, the output positive end is connected with the input positive end of the electric energy storage module 3, the output negative end is connected with the input negative end of the electric energy storage module 3 and is provided with a boosting module 2 of an anti-reverse diode, and the boosting module is used for boosting output voltage to charge the electric energy storage module 3;
and the electric energy storage module 3 is used for storing electric energy.
In the embodiment, considering that the electric energy output by the charging power supply 1 is generally stored in the electric energy storage module 3 in the prior art, so that the electric energy storage module 3 supplies power to the low-power consumption electronic device, such as a solar calculator, the power consumption of the calculator is small, therefore, a solar photovoltaic panel is generally arranged on the solar calculator, and when light irradiates, the light energy is converted into the electric energy and stored in the electric energy storage module 3, so as to supply power to the calculator when the calculator operates. In the prior art, when the electric energy output by the charging power supply 1 is stored in the electric energy storage module 3, an anti-reverse diode D is usually arranged between the charging power supply 1 and the electric energy storage module 3 to prevent the current of the electric energy storage module 3 from flowing back to the charging power supply 1, as shown in fig. 1. However, the anti-reverse diode D may be turned on only when a forward conduction voltage is applied, and if the voltage output by the charging power supply 1 is small, the anti-reverse diode D may not be turned on, that is, the electric energy storage module 3 may not be charged, and in addition, when the output of the charging power supply 1 is unstable, there may be a case where the anti-reverse diode D may be turned on but the electric energy storage module 3 may not be charged.
In order to solve the technical problem, the boosting module 2 is arranged between the charging power supply 1 and the electric energy storage module 3, so that the electric energy storage module 3 is charged after the voltage output by the charging power supply 1 is boosted, and the charging efficiency is improved. In addition, when the electric energy output by the charging power supply 1 is weak (for example, the output current is 10 to 20mA and the voltage is 1.8 to 4V), the charging circuit in the application can also boost the output voltage of the charging power supply 1, so as to charge the electric energy storage module 3. The boost module 2 in this application also is equipped with prevents the anti-diode, can prevent that the electric current of electric energy storage module 3 from flowing backward to charging source 1.
In the present application, the boost module 2, the charging power supply 1, and the electric energy storage module 3 may be connected according to a topology of a boost circuit, but are not limited thereto.
In addition, the charging power supply 1 in the present application may be, but is not limited to, a solar photovoltaic panel or a generator. The electrical energy storage module 3 in the present application may be, but is not limited to, a charging capacitor.
Of course, the present application does not limit the number of the booster modules 2 connected between the charging power source 1 and the electric energy storage module 3.
To sum up, the charging circuit in this application boosts the voltage output by the charging power supply 1, and promotes the efficiency of charging the electric energy storage module 3, and has a simple structure and a low cost.
On the basis of the above-described embodiment:
as a preferred embodiment, the charging power source 1 is a solar photovoltaic panel.
In this embodiment, select for use the solar photovoltaic board as charging source 1, the solar photovoltaic board can be with light energy conversion for the electric energy to charge for electric energy storage module 3.
In addition, the solar photovoltaic panel also has the characteristic of energy saving.
As a preferred embodiment, the charging power source 1 is a generator.
In this embodiment, select the generator as charging source 1 for use, the generator can be with the energy conversion of other forms electric energy to charge for electric energy storage module 3.
In addition, the generator also has the characteristics of simple structure and easy maintenance.
As a preferred embodiment, the electric energy storage module 3 is a super capacitor C.
In this embodiment, please refer to fig. 3, and fig. 3 is a schematic structural diagram of a specific charging circuit provided by the present invention, wherein a super capacitor C is selected as the electric energy storage module 3, and the super capacitor C can store electric energy.
In addition, the super capacitor C also has the characteristics of simple structure, easy maintenance and larger capacitance value (farad level).
As a preferred embodiment, the booster module 2 includes:
the first end of the inductor is an input positive end of the boosting module 2 and is connected with an output positive end of the charging power supply 1, and the second end of the inductor is connected with an input end of the anti-reverse diode and the first end of the switching tube and is used for storing electric energy output by the charging power supply 1 when the switching tube is switched on and outputting the stored electric energy when the switching tube is switched off so as to boost the output voltage of the charging power supply 1 and charge the electric energy storage module 3;
the output end of the reverse diode is the output positive end of the boosting module 2 and is connected with the input positive end of the electric energy storage module 3, and the reverse diode is used for being cut off when the switching tube is switched on and is switched on when the switching tube is switched off so as to switch on a circuit between the inductor and the electric energy storage module 3;
the control end of the switching tube is connected with the output end of the signal generator, the second end of the switching tube is connected with the input negative end of the boosting module 2 and the output negative end of the charging power supply 1, and is connected with the output negative end of the boosting module 2 and the input negative end of the electric energy storage module 3 and grounded, and the switching tube is used for being switched on when receiving a switching-on control signal sent by the signal generator and being switched off when receiving a switching-off control signal sent by the signal generator;
and the signal generator is used for outputting a switching-on control signal and a switching-off control signal based on the electric energy stored by the inductor.
In this embodiment, an inductor, a switching tube and an anti-reverse diode are arranged in the boost module 2, as shown in fig. 3, a first end of the inductor is connected with an output positive end of the charging power supply 1 as an input positive end of the boost module 2, a second end of the inductor is connected with the first end of the switching tube and an input end of the anti-reverse diode, and can store electric energy output by the charging power supply 1 when the switching tube is turned on, and output the stored electric energy to the electric energy storage module 3 through the anti-reverse diode when the switching tube is turned off, so as to charge the electric energy storage module 3 together with the charging power supply 1, and charge the electric energy storage module 3 after the output voltage of the charging power supply 1 is boosted; the control end of the switch tube is connected with the control signal output end of the signal generator, the second end of the switch tube is used as the input positive end and the output negative end of the boosting module 2, is connected with the output negative end of the charging power supply 1 and the input negative end of the electric energy storage module 3, is grounded, and can be conducted when the conduction control signal of the signal generator is received; the output end of the anti-reverse diode is connected with the first end of the electric energy storage module 3 as the output positive end of the boosting module 2, can be cut off when the switch tube is switched on and can switch on the circuit between the inductor and the electric energy storage module 3 when the switch tube is switched off, and prevents the current of the electric energy storage module 3 from flowing backwards to the charging power supply 1.
Wherein the signal generator may output the turn-on control signal and the turn-off control signal based on a time when the inductor stores the electric energy and a time when the electric energy is output.
The Signal generator may be, but is not limited to, an MCU (micro controller Unit), a DSP (Digital Signal Processing), or a sequential circuit integrated on the control chip.
In addition, as can be seen from fig. 3, in fig. 3, two voltage boosting modules 2 are connected between the charging power supply 1 and the electric energy storage module 3, the two voltage boosting modules 2 are connected in parallel, and the structure is the same, and the applicant considers that when a super capacitor C is adopted as the electric energy storage module 3, the capacitance value of the super capacitor C is relatively large, generally in the farad level, and the electric energy stored in the inductor L1 and the inductor L2 is relatively small, when the voltage of the charging power supply 1 is relatively low, the time for the charging circuit to charge the super capacitor C is very short, by respectively controlling the on and off time of the switching tubes in the two voltage boosting modules 2 to be staggered, that is, the duty ratios of the two voltage boosting modules 2 are both controlled to be 50%, that is, when the inductor L1 is charged in one cycle, the inductor L2 is discharged to charge the electric energy storage module 3, and vice versa, this control manner can realize that the super capacitor C is charged twice in one cycle, the charging efficiency is doubled.
It should be noted that the switch tube in the present application may be, but is not limited to, a MOSFET
(Metal-Oxide-Semiconductor Field-Effect Transistor).
It can be seen that, the boost module 2 in the present application not only can boost the output voltage of the charging power supply 1, but also has the characteristics of simple structure and low cost.
In addition, the charging circuit in this application's structure is comparatively simple, and electronic components is less, and easy realization and cost are lower to can duplicate the use in different products and application scenes.
As a preferred embodiment, the number of the boosting modules 2 is N, and the output phases of the N boosting modules 2 are sequentially different by 360/N degrees.
In consideration of the fact that the electric energy stored in the inductor is small, when the voltage output by the charging power supply 1 is low, the time for charging the electric energy storage module 3 is short, in order to further improve the efficiency for charging the electric energy storage module 3, the N boosting modules 2 are arranged in the application, and the output phases of the N boosting modules 2 are sequentially different by 360/N degrees, so that each boosting circuit can sequentially charge the electric energy storage module 3 in a period of a control signal, that is, the electric energy storage module 3 is charged for multiple times in one period, and the storage efficiency for the electric energy is improved.
Specifically, the applicant considers that when the switching tube is closed, the voltage output by the charging power supply 1 can be stored in the inductor as electric energy, and when the switching tube is disconnected, the electric energy charged and stored by the inductor and the voltage output by the charging power supply 1 are input into the electric energy storage module 3 together to charge the electric energy storage module, based on this, a plurality of boosting modules 2 connected in parallel are arranged, as shown in fig. 3, two boosting modules 2 are connected in parallel in fig. 3, and the control ends of the switching tubes of the boosting modules 2 respectively input square wave signals with the same frequency and the phases different by 360/N degrees, so that the boosting modules 2 can sequentially store energy for their own inductors in each period of the square wave signals, and sequentially store energy for the electric energy storage module 3, and further improve the efficiency of charging the electric energy storage module 3. Referring to fig. 4, fig. 4 is a waveform diagram, I in the figure, of a charging circuit charging an electric energy storage module according to the present invention1Is the output current of inductor L2, I2For the output current of the inductor L1, I is the current flowing through the electric energy storage module 3, Q1 is the control signal output by the signal generator to the switching tube Q1, and Q2 is the control signal output by the signal generator to the switching tube Q2, it can be seen that the control signal of Q1 and the control signal of Q2 have the same frequency, the duty ratios are both 50%, and the polarities are opposite, that is, the control signals are square wave signals with 180 degrees phase difference, specifically, T is the square wave signal with 180 degrees phase difference0To T1In the period, the switching tube Q1 is switched on, the anti-reverse diode D1 is switched off, the charging power supply 1 stores energy for the inductor L1, the switching tube Q2 is switched off, the anti-reverse diode D2 is switched on, and the charging power supply 1 and the electric energy stored in the inductor L2 in the previous period charge the electric energy storage module 3 together; t is1To T2In the period, the switching tube Q2 is turned on, the anti-reverse diode D2 is turned off, the charging power supply 1 stores energy for the inductor L2, the switching tube Q1 is turned off, the anti-reverse diode D1 is turned on, and the charging power supply 1 and the electric energy stored in the inductor L1 in the previous period charge the electric energy storage module 3 together. Therefore, the power storage module can be charged twice in one period of the control signal, and the charging efficiency is improved. Therefore, a plurality of boosting modules 2 can be designed to be connected in parallel between the charging power supply 1 and the electric energy storage module 3 based on the electric energy which can be stored by the inductor, so that the original idle time sequence in one period is filled, and the charging efficiency is further improved.
It should be noted that, in the present application, the number of the boosting modules 2 connected in parallel is set according to the maximum energy that can be stored by the inductor in the boosting module 2 and the time for storing the energy.
In addition, in the present application, control signals with different frequencies may be input to the respective boosting modules 2, which may be determined according to actual situations.
Considering the relationship between the cycle and the frequency of the control signal, that is, T is 2 × pi × f, where T is the cycle of the control signal and f is the frequency of the control signal, the output phases of the N boosting modules 2 sequentially differ by 2 × pi/N degrees, that is, 360/N degrees, and for example, when two boosting modules 2 are provided, the frequencies of the on control signals of the two boosting modules 2 are the same, and the duty ratios are both 50%, and the phases differ by 180 degrees.
As a preferred embodiment, the signal generator is a signal generator, an output end of which is connected to the control ends of the switching tubes in the N boosting modules 2, and outputs a turn-on control signal and a turn-off control signal based on the electric energy stored in the inductor to control the switching tubes in the N boosting modules 2, so that output phases of the N boosting modules 2 sequentially differ by 360/N degrees.
In order to control the conduction and the disconnection of the switch tube in each boosting module 2, the signal generator in the application is respectively connected with the control ends of the switch tubes in the N boosting modules 2, so that the conduction and the disconnection of the switch tubes in the N boosting modules 2 can be controlled to enable the output phases of the N boosting modules 2 to sequentially differ by 360/N degrees, the boosting modules 2 are controlled to sequentially charge the electric energy storage module 3, and the charging efficiency of the electric energy storage module 3 is improved.
It should be noted that, a plurality of signal generators may also be provided in the present application, each signal generator is connected to the control end of the switching tube in each boosting module, and outputs a turn-on control signal and a turn-off control signal for controlling turn-on and turn-off of the corresponding switching tube based on the electric energy stored in the corresponding inductor.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A charging circuit, comprising:
a charging power supply for outputting a voltage;
the input positive end is connected with the output positive end of the charging power supply, the input negative end is connected with the output negative end of the charging power supply, the output positive end is connected with the input positive end of the electric energy storage module, the output negative end is connected with the input negative end of the electric energy storage module and is provided with a boosting module of an anti-reverse diode, and the boosting module is used for boosting the output voltage to charge the electric energy storage module;
the electric energy storage module is used for storing electric energy.
2. The charging circuit of claim 1, wherein the charging power source is a solar photovoltaic panel.
3. The charging circuit of claim 1, wherein the charging power source is a generator.
4. The charging circuit of claim 1, wherein the electrical energy storage module is a super capacitor.
5. The charging circuit of any of claims 1 to 4, wherein the boost module comprises:
the first end is an input positive end of the boosting module and is connected with an output positive end of the charging power supply, and the second end is an inductor which is connected with the input end of the anti-reverse diode and the first end of the switching tube and is used for storing electric energy output by the charging power supply when the switching tube is switched on and outputting the stored electric energy when the switching tube is switched off so as to boost the output voltage of the charging power supply and charge the electric energy storage module;
the anti-reverse diode is connected with the input positive end of the electric energy storage module and the output end of the boost module, and is used for being cut off when the switch tube is switched on and being switched on when the switch tube is switched off so as to switch on a circuit between the inductor and the electric energy storage module;
the control end of the switching tube is connected with the output end of the signal generator, the second end of the switching tube is connected with the input negative end of the boosting module and the output negative end of the charging power supply, is connected with the output negative end of the charging power supply and grounded, and is used for being switched on when a switching-on control signal sent by the signal generator is received and being switched off when a switching-off control signal sent by the signal generator is received;
the signal generator is used for outputting the switching-on control signal and the switching-off control signal based on the electric energy stored in the inductor.
6. The charging circuit of claim 5, wherein the number of the boosting modules is N, and the output phases of the N boosting modules are sequentially different by 360/N degrees.
7. The charging circuit according to claim 6, wherein the signal generator is a signal generator whose output terminal is connected to the control terminal of the switching tube in the N boosting modules, and outputs the on-control signal and the off-control signal based on the electric energy stored in the inductor to control the switching tube in the N boosting modules such that the output phases of the N boosting modules sequentially differ by 360/N degrees.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023044214.9U CN215267677U (en) | 2020-12-16 | 2020-12-16 | Charging circuit |
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|---|---|---|---|
| CN202023044214.9U CN215267677U (en) | 2020-12-16 | 2020-12-16 | Charging circuit |
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| CN215267677U true CN215267677U (en) | 2021-12-21 |
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