Super capacitor charging circuit

Abstract

The utility model discloses a super capacitor charging circuit, which relates to the technical field of super capacitors, and comprises a power supply control module used for accessing direct current electric energy and controlling the electric energy transmission state, and used for carrying out two times of phase reversal processing on a signal output by a voltage sampling module and carrying out electric energy transmission work; the voltage regulation module is used for regulating the electric energy input into the voltage conversion module and providing constant-current and constant-voltage electric energy for the super capacitor connected with the super capacitor module through the voltage conversion module; the voltage sampling module is used for performing voltage sampling on the charging electric energy and the electric energy of the super capacitor module; and the full-power control module is used for full-power detection and controlling the power-off work of the power supply control module during full power. According to the super capacitor charging circuit, when the super capacitor module is connected with the super capacitor, the power supply control module is automatically controlled to carry out electric energy transmission work, then the voltage regulation module and the voltage conversion module carry out isolated constant-voltage and constant-current power supply, and when the super capacitor is fully charged, power is automatically cut off.

Description

Technical Field

[0001] The utility model relates to the technical field of super capacitors, in particular to a super capacitor charging circuit. Background Art

[0002] With the continuous upgrading of power terminals and the introduction of pilot specifications for new-generation power terminals, the demand for supercapacitor applications is gradually increasing. The charge and discharge curves of supercapacitors are closer to capacitors than traditional batteries, and can be used in short-term high-peak currents or in areas where traditional batteries cannot be used. Most existing supercapacitor charging circuits use dedicated charging chips, which cannot be isolated from the supercapacitor for power supply, resulting in certain noise and electromagnetic interference between circuits, reducing the reliability of the charging circuit, and requiring manual charging control and power-off control after connecting to the supercapacitor. The control method is relatively cumbersome, and therefore needs to be improved. Utility Model Content

[0003] The embodiment of the utility model provides a supercapacitor charging circuit to solve the problems raised in the above background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A supercapacitor charging circuit comprises: a power control module, a voltage regulation module, a voltage conversion module, a supercapacitor module, a voltage sampling module and a full-charge control module;

[0006] A power control module, connected to the voltage sampling module, the voltage regulating module, the voltage conversion module and the full-power control module, for receiving direct current power, for receiving the voltage signal output by the voltage sampling module and performing two inversion processes on the voltage signal, for transmitting direct current power to the voltage regulating module and the voltage conversion module, and for receiving the first control signal output by the full-power control module and stopping the transmission of power;

[0007] A voltage regulating module, connected to the voltage sampling module and the voltage conversion module, for receiving the voltage signal output by the voltage sampling module and regulating the electric energy input to the voltage conversion module, for absorbing the peak voltage;

[0008] The voltage conversion module is used to perform isolation transformation, rectification and filtering on the input DC power and output charging power;

[0009] A super capacitor module, connected to the voltage conversion module, used to connect to the super capacitor and receive charging power;

[0010] A voltage sampling module is connected to the voltage conversion module and the super capacitor module, and is used to detect the connection state between the super capacitor module and the super capacitor when the power control module is not supplying power, and to detect the voltage value between the voltage conversion module and the super capacitor module when the power control module is supplying power, and to output a voltage signal;

[0011] The full-power control module is connected to the voltage sampling module and is used to set a full-power threshold and output a first control signal when the voltage signal is greater than the full-power threshold.

[0012] As a further solution of the utility model: the power control module includes a power interface, a first power tube, a first resistor, a first switch tube, a first inverter and a second inverter;

[0013] Preferably, the power interface is connected to the source of the first power tube with the first end and connected to the gate of the first power tube and the collector of the first switching tube through the first resistor, the emitter of the first switching tube is grounded, the base of the first switching tube is connected to the output end of the first inverter and the full power control module, the input end of the first inverter is connected to the output end of the second inverter, the input end of the second inverter is connected to the voltage sampling module, and the drain of the first power tube is connected to the voltage regulation module and the voltage conversion module.

[0014] As a further solution of the utility model: the voltage regulation module includes a first capacitor, a second capacitor, a third capacitor, a second resistor, a first power management chip, a third resistor, a fourth capacitor and a first diode;

[0015] Preferably, one end of the first capacitor is connected to the eighth end of the first power management chip, the third end of the first power management chip, one end of the third resistor, the first end of the fourth capacitor and the drain of the first power tube, the ninth end, the fourth end, the fifth end and the eleventh end of the first power management chip are all grounded, the tenth end of the first power management chip is grounded through the second capacitor, the first end of the first management chip is connected to the ground end through the second resistor and the third capacitor in sequence, the sixth end and the seventh end of the first power management chip are both connected to the anode of the first diode and the voltage conversion module, the cathode of the first diode is connected to the second end of the fourth capacitor and the other end of the third resistor, and the second end of the first power management chip is connected to the voltage sampling module.

[0016] As a further solution of the utility model: the voltage conversion module includes a first transformer, a second diode and a fifth capacitor; the super capacitor module includes a super capacitor interface;

[0017] Preferably, the first end of the primary side of the first transformer is connected to the second end of the fourth capacitor and the drain of the first power tube, the second end of the primary side of the first transformer is connected to the anode of the first diode, the first end of the secondary side of the first transformer is connected to the anode of the second diode, the cathode of the second diode is connected to one end of the fifth capacitor and the first end of the supercapacitor interface, and the second end of the secondary side of the first transformer, the other end of the fifth capacitor and the second end of the supercapacitor interface are all grounded.

[0018] As a further solution of the utility model: the voltage sampling module includes a fourth resistor and a fifth resistor;

[0019] Preferably, the first end of the fourth resistor is connected to the cathode of the second diode, the second end of the fourth resistor is connected to the second end of the first power management chip, the input end of the second inverter and the full power control module, and is connected to the second end of the supercapacitor interface and the ground end through the fifth resistor.

[0020] As a further solution of the utility model: the full power control module includes a first power supply, a sixth resistor, a seventh resistor, a first comparator, an eighth resistor and a second switch tube;

[0021] Preferably, the first power supply is connected to one end of the seventh resistor and the inverting end of the first comparator through the sixth resistor, the non-inverting end of the first comparator is connected to the second end of the fourth resistor, the output end of the first comparator is connected to the base of the second switching tube through the eighth resistor, the emitter of the second switching tube and the other end of the seventh resistor are both grounded, and the collector of the second switching tube is connected to the base of the first switching tube.

[0022] Compared with the prior art, the beneficial effects of the utility model are as follows: the supercapacitor charging circuit of the utility model samples the voltage of the supercapacitor module by the voltage sampling module, so that when the supercapacitor module is connected to the supercapacitor, the power supply control module is automatically controlled to perform power transmission, and then the voltage regulation module and the voltage conversion module perform isolated constant voltage and constant current power supply to provide the required charging power for the supercapacitor module, reduce noise interference and electromagnetic interference between circuits, and improve the reliability of the charging circuit. The voltage sampling module cooperates with the full-charge control module to perform full-charge detection on the supercapacitor module, and when it is fully charged, the power supply control module is automatically controlled to power off, thereby improving the intelligence of the charging circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments of the utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1A schematic block diagram of a supercapacitor charging circuit provided in an example of the utility model.

[0025] Figure 2 A circuit diagram of a supercapacitor charging circuit provided in an example of the utility model.

[0026] Figure 3 This is a connection circuit diagram of a full-power control module provided by an example of the utility model. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] In one embodiment, see Figure 1 , a supercapacitor charging circuit, comprising: a power control module 1, a voltage regulation module 2, a voltage conversion module 3, a supercapacitor module 4, a voltage sampling module 5 and a full-charge control module 6;

[0029] Specifically, the power control module 1 is connected to the voltage sampling module 5, the voltage regulating module 2, the voltage conversion module 3 and the full-power control module 6, and is used to access the DC power, to receive the voltage signal output by the voltage sampling module 5 and perform two inversion processes on the voltage signal, to transmit the DC power to the voltage regulating module 2 and the voltage conversion module 3, and to receive the first control signal output by the full-power control module 6 and stop the transmission of power;

[0030] A voltage regulating module 2, connected to the voltage sampling module 5 and the voltage conversion module 3, for receiving the voltage signal output by the voltage sampling module 5 and regulating the electric energy input to the voltage conversion module 3, for absorbing the peak voltage;

[0031] The voltage conversion module 3 is used to perform isolation transformation and rectification and filtering on the input DC power and output charging power;

[0032] A supercapacitor module 4 is connected to the voltage conversion module 3 and is used to connect to the supercapacitor and receive charging energy;

[0033] A voltage sampling module 5 is connected to the voltage conversion module 3 and the super capacitor module 4, and is used to detect the connection state between the super capacitor module 4 and the super capacitor when the power control module 1 is not powered, and to detect the voltage value between the voltage conversion module 3 and the super capacitor module 4 when the power control module 1 is powered, and to output a voltage signal;

[0034] The full-power control module 6 is connected to the voltage sampling module 5 and is used to set a full-power threshold and output a first control signal when the voltage signal is greater than the full-power threshold.

[0035] In a specific embodiment, the power control module 1 may adopt a power control circuit composed of a power interface, a power tube, a triode, an inverter, etc., may invert the electric energy output by the voltage sampling module 5, may access direct current electric energy and control the transmission state of the electric energy; the voltage regulation module 2 may adopt a voltage regulation circuit composed of a power management chip, a capacitor, a resistor, an RCD absorption circuit, etc., the RCD absorption circuit absorbs the peak voltage, and the power management chip adjusts the electric energy of the input voltage conversion module 3 according to the signal output by the voltage sampling module 5, thereby realizing constant voltage and constant current control of the voltage conversion module 3; the voltage conversion module 3 may adopt a voltage conversion circuit composed of a transformer, a diode and a capacitor, which is driven by the voltage regulation module 2 and isolates the input electric energy. The above-mentioned supercapacitor module 4 can adopt a supercapacitor circuit composed of a supercapacitor interface to connect to the supercapacitor; the above-mentioned voltage sampling module 5 can adopt a voltage sampling circuit composed of a resistor, and when the power control module 1 is not powered, it can detect the connection state between the supercapacitor module 4 and the supercapacitor, and when the power control module 1 is powered, it can detect the voltage value between the voltage conversion module 3 and the supercapacitor module 4; the above-mentioned full-power control module 6 can adopt a comparison circuit composed of a comparator, a resistor, a transistor, etc., through the set full-power threshold and judging the relationship between the signal output by the voltage sampling module 5 and the full-power threshold, and then judging whether it is fully charged, and when it is fully charged, controlling the power-off work of the power control module 1.

[0036] In another embodiment, see Figure 1 , Figure 2 and Figure 3 The power control module 1 includes a power interface, a first power tube Q1, a first resistor R1, a first switch tube VT1, a first inverter J1 and a second inverter J2;

[0037] Specifically, the first end of the power interface is connected to the source of the first power tube Q1 and the gate of the first power tube Q1 and the collector of the first switch tube VT1 through the first resistor R1, the emitter of the first switch tube VT1 is grounded, the base of the first switch tube VT1 is connected to the output end of the first inverter J1 and the full power control module 6, the input end of the first inverter J1 is connected to the output end of the second inverter J2, the input end of the second inverter J2 is connected to the voltage sampling module 5, and the drain of the first power tube Q1 is connected to the voltage regulation module 2 and the voltage conversion module 3.

[0038] In a specific embodiment, the first power tube Q1 may be a P-channel field effect tube, which is triggered to be turned off by the first resistor R1 and triggered to be turned on by the first switch tube VT1; the first switch tube VT1 may be an NPN transistor; the first inverter J1 and the second inverter J2 may both be NOT gate logic chips, which perform two inversion processes on the input voltage signal, so as to stably drive the operation of the first switch tube VT1.

[0039] Further, the voltage regulating module 2 includes a first capacitor C1, a second capacitor C2, a third capacitor C3, a second resistor R2, a first power supply VCC1 management chip U1, a third resistor R3, a fourth capacitor C4 and a first diode D1;

[0040] Specifically, one end of the first capacitor C1 is connected to the eighth end of the first power supply VCC1 management chip U1, the third end of the first power supply VCC1 management chip U1, one end of the third resistor R3, the first end of the fourth capacitor C4 and the drain of the first power tube Q1, the ninth end, the fourth end, the fifth end and the eleventh end of the first power supply VCC1 management chip U1 are all grounded, the tenth end of the first power supply VCC1 management chip U1 is grounded through the second capacitor C2, the first end of the first management chip is connected to the ground end through the second resistor R2 and the third capacitor C3 in sequence, the sixth end and the seventh end of the first power supply VCC1 management chip U1 are both connected to the anode of the first diode D1 and the voltage conversion module 3, the cathode of the first diode D1 is connected to the second end of the fourth capacitor C4 and the other end of the third resistor R3, and the second end of the first power supply VCC1 management chip U1 is connected to the voltage sampling module 5.

[0041] In a specific embodiment, the first power supply VCC1 management chip U1 can select the TPS61087DRCR power management chip. According to the voltage chip output by the voltage sampling module 5, the sixth and seventh terminals of the first power supply VCC1 management chip U1 can adjust the electric energy of the input voltage conversion module 3; the third resistor R3, the fourth capacitor C4 and the first diode D1 form an RCD absorption circuit to absorb the peak voltage generated by the sixth and seventh terminals of the first power supply VCC1 chip.

[0042] Further, the voltage conversion module 3 includes a first transformer B1, a second diode D2 and a fifth capacitor C5; the super capacitor module 4 includes a super capacitor interface;

[0043] Specifically, the first end of the primary side of the first transformer B1 is connected to the second end of the fourth capacitor C4 and the drain of the first power tube Q1, the second end of the primary side of the first transformer is connected to the anode of the first diode D1, the first end of the secondary side of the first transformer B1 is connected to the anode of the second diode D2, the cathode of the second diode D2 is connected to one end of the fifth capacitor C5 and the first end of the supercapacitor interface, and the second end of the secondary side of the first transformer B1, the other end of the fifth capacitor C5 and the second end of the supercapacitor interface are all grounded.

[0044] In a specific embodiment, the first transformer B1 can be a high-frequency transformer; the second diode D2 and the fifth capacitor C5 perform rectification and filtering.

[0045] Further, the voltage sampling module 5 includes a fourth resistor R4 and a fifth resistor R5;

[0046] Specifically, the first end of the fourth resistor R4 is connected to the cathode of the second diode D2, the second end of the fourth resistor R4 is connected to the second end of the first power supply VCC1 management chip U1, the input end of the second inverter J2 and the full power control module 6, and is connected to the second end of the supercapacitor interface and the ground end through the fifth resistor R5.

[0047] In a specific embodiment, the fourth resistor R4 and the fifth resistor R5 perform voltage sampling.

[0048] Furthermore, the full-power control module 6 includes a first power supply VCC1, a sixth resistor R6, a seventh resistor R7, a first comparator A1, an eighth resistor R8 and a second switch tube VT2;

[0049] Specifically, the first power supply VCC1 is connected to one end of the seventh resistor R7 and the inverting end of the first comparator A1 through the sixth resistor R6, the non-inverting end of the first comparator A1 is connected to the second end of the fourth resistor R4, the output end of the first comparator A1 is connected to the base of the second switch tube VT2 through the eighth resistor R8, the emitter of the second switch tube VT2 and the other end of the seventh resistor R7 are both grounded, and the collector of the second switch tube VT2 is connected to the base of the first switch tube VT1.

[0050] In a specific embodiment, the first power supply VCC1, the sixth resistor R6 and the seventh resistor R7 set the full power threshold; the first comparator A1 can use an LM358 comparator; the second switch tube VT2 can use an NPN transistor to control the potential of the base of the first switch tube VT1.

[0051] In a supercapacitor charging circuit of the present embodiment, direct current power is connected to the power interface. At this time, the power transmitted by the first resistor R1 causes the first power tube Q1 to be turned off. If the supercapacitor module 4 is connected to the supercapacitor at this time, the fourth resistor R4 and the fifth resistor R5 detect the voltage of the supercapacitor, and the first inverter J1 and the second inverter J2 perform inversion processing to trigger the conduction of the first switch tube VT1, and then trigger the conduction of the first power tube Q1. The power is transmitted to the first power supply VCC1 management chip U1, and the first power supply VCC1 management chip U1 controls the voltage signal fed back by the fourth resistor R4 and the fifth resistor R5. The first power supply VCC1 manages the switching state of the switching device inside the chip U1, and then controls the power output state of the first transformer B1, and then provides the supercapacitor with charging power in a constant voltage and constant current state to meet the charging needs of the supercapacitor. When the signal output by the fourth resistor R4 and the fifth resistor R5 is greater than the full power threshold set by the first power supply VCC1, the sixth resistor R6 and the seventh resistor R7, the first comparator A1 will output a high-level signal and control the second switch tube VT2 to turn on, lowering the base voltage of the first switch tube VT1, the first switch tube VT1 is turned off, and the first power tube Q1 will also be turned off, and then the power supply will stop.

[0052] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0053] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A supercapacitor charging circuit, characterized in that: The supercapacitor charging circuit includes: a power control module, a voltage regulation module, a voltage conversion module, a supercapacitor module, a voltage sampling module and a full-charge control module; The power control module is connected to the voltage sampling module, the voltage regulating module, the voltage conversion module and the full-power control module, and is used to access the DC power, to receive the voltage signal output by the voltage sampling module and perform two inversion processes on the voltage signal, to transmit the DC power to the voltage regulating module and the voltage conversion module, and to receive the first control signal output by the full-power control module and stop the transmission of power; The voltage regulating module is connected to the voltage sampling module and the voltage conversion module, and is used to receive the voltage signal output by the voltage sampling module and regulate the electric energy input to the voltage conversion module, so as to absorb the peak voltage; The voltage conversion module is used to perform isolation transformation and rectification and filtering on the input DC power and output charging power; The super capacitor module is connected to the voltage conversion module and is used to connect to the super capacitor and receive charging power; The voltage sampling module is connected to the voltage conversion module and the super capacitor module, and is used to detect the connection state between the super capacitor module and the super capacitor when the power control module is not supplying power, and to detect the voltage value between the voltage conversion module and the super capacitor module when the power control module is supplying power, and to output a voltage signal; The full-power control module is connected to the voltage sampling module, and is used to set a full-power threshold and output a first control signal when the voltage signal is greater than the full-power threshold.

2. A supercapacitor charging circuit according to claim 1, characterized in that: The power control module includes a power interface, a first power tube, a first resistor, a first switch tube, a first inverter and a second inverter; The power interface is connected to the source of the first power tube with the first end and connected to the gate of the first power tube and the collector of the first switch tube through the first resistor, the emitter of the first switch tube is grounded, the base of the first switch tube is connected to the output end of the first inverter and the full power control module, the input end of the first inverter is connected to the output end of the second inverter, the input end of the second inverter is connected to the voltage sampling module, and the drain of the first power tube is connected to the voltage regulation module and the voltage conversion module.

3. A supercapacitor charging circuit according to claim 2, characterized in that: The voltage regulating module includes a first capacitor, a second capacitor, a third capacitor, a second resistor, a first power management chip, a third resistor, a fourth capacitor and a first diode; One end of the first capacitor is connected to the eighth end of the first power management chip, the third end of the first power management chip, one end of the third resistor, the first end of the fourth capacitor and the drain of the first power tube, the ninth end, the fourth end, the fifth end and the eleventh end of the first power management chip are all grounded, the tenth end of the first power management chip is grounded through the second capacitor, the first end of the first management chip is connected to the ground end through the second resistor and the third capacitor in sequence, the sixth end and the seventh end of the first power management chip are both connected to the anode of the first diode and the voltage conversion module, the cathode of the first diode is connected to the second end of the fourth capacitor and the other end of the third resistor, and the second end of the first power management chip is connected to the voltage sampling module.

4. A supercapacitor charging circuit according to claim 3, characterized in that: The voltage conversion module includes a first transformer, a second diode and a fifth capacitor; the super capacitor module includes a super capacitor interface; The first end of the primary side of the first transformer is connected to the second end of the fourth capacitor and the drain of the first power tube, the second end of the primary side of the first transformer is connected to the anode of the first diode, the first end of the secondary side of the first transformer is connected to the anode of the second diode, the cathode of the second diode is connected to one end of the fifth capacitor and the first end of the supercapacitor interface, and the second end of the secondary side of the first transformer, the other end of the fifth capacitor and the second end of the supercapacitor interface are all grounded.

5. A supercapacitor charging circuit according to claim 4, characterized in that: The voltage sampling module includes a fourth resistor and a fifth resistor; The first end of the fourth resistor is connected to the cathode of the second diode, the second end of the fourth resistor is connected to the second end of the first power management chip, the input end of the second inverter and the full power control module, and is connected to the second end of the super capacitor interface and the ground through the fifth resistor.

6. A supercapacitor charging circuit according to claim 5, characterized in that: The full-power control module includes a first power supply, a sixth resistor, a seventh resistor, a first comparator, an eighth resistor and a second switch tube; The first power supply is connected to one end of the seventh resistor and the inverting end of the first comparator through the sixth resistor, the non-inverting end of the first comparator is connected to the second end of the fourth resistor, the output end of the first comparator is connected to the base of the second switch tube through the eighth resistor, the emitter of the second switch tube and the other end of the seventh resistor are both grounded, and the collector of the second switch tube is connected to the base of the first switch tube.

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