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CN-121546752-B - Charging activation circuit and photovoltaic charging system

CN121546752BCN 121546752 BCN121546752 BCN 121546752BCN-121546752-B

Abstract

The embodiment of the disclosure discloses a charging activation circuit and a photovoltaic charging system, wherein the charging activation circuit comprises a controller, the controller is used for setting an activation control signal when a device to be charged is controlled to be turned off and sending the activation control signal to a signal holding circuit for dormancy, the signal holding circuit is used for holding the activation control signal, a voltage detection circuit is used for outputting an effective level when the voltage of a first voltage source meets a first condition, an activation signal generation circuit is used for generating an activation signal according to the activation control signal held by the signal holding circuit and sending the activation signal to the controller when the voltage detection circuit outputs the effective level, and the controller is further used for waking up when the activation signal is received, judging that the charging condition is not met, and setting the activation control signal again and sending the activation control signal to the signal holding circuit for dormancy after dormancy is prepared again. The charging activation circuit and the photovoltaic charging system enable the controller to be activated after each sleep when the voltage of the first voltage source meets a predetermined condition.

Inventors

  • YOU YONGLIANG
  • QIN GENG
  • Xiao Cunfa
  • DENG ZHIQIANG

Assignees

  • 深圳市德兰明海新能源股份有限公司

Dates

Publication Date
20260508
Application Date
20260115

Claims (13)

  1. 1. A charging activation circuit applied to a device to be charged, comprising: The controller is used for setting an activation control signal when the equipment to be charged is controlled to be powered off, and sending the activation control signal to the signal holding circuit to be dormant; The signal holding circuit is connected with the controller and is used for holding an activation control signal; the voltage detection circuit is used for acquiring the voltage of the first voltage source, and outputting an effective level when the voltage of the first voltage source meets a first condition, wherein the effective level is a level enabling the activation signal generation circuit to work; the activation signal generation circuit is respectively connected with the voltage detection circuit and the signal holding circuit, and is configured to generate an activation signal according to an activation control signal held by the signal holding circuit and send the activation signal to the controller when the voltage detection circuit outputs an effective level; The controller is further configured to wake up each time the activation signal is received, control the first voltage source to charge the device to be charged when the charging condition is determined to be met, reset the activation control signal when the charging condition is determined not to be met and the device to be charged is prepared to sleep again, and send the reset activation control signal to the signal holding circuit to sleep.
  2. 2. The charge activation circuit of claim 1, wherein the charge activation circuit comprises, The timing duration control signal is M bits, wherein M is a natural number; the activation signal generation circuit comprises a frequency division circuit and a channel selection circuit, wherein the channel selection circuit is provided with A plurality of channels; The frequency dividing circuit is respectively connected with the voltage detection circuit and the channel selection circuit and is used for outputting N square wave signals with different frequencies when the voltage detection circuit outputs an effective level; the channel selection circuit is respectively connected with the frequency division circuit and the signal holding circuit, is arranged to select a corresponding channel according to the timing duration control signal, and outputs a square wave signal transmitted by the selected channel as the activation signal; Wherein when N is the same as the N channels in the channels are in one-to-one correspondence with the N square wave signals; When (when) N is the same as the A plurality of channels and one of the N square wave signals The square wave signals are in one-to-one correspondence.
  3. 3. The charge activation circuit of claim 2, wherein the charge activation circuit comprises, The activation control signal further comprises a circuit enable control signal; The circuit enable control signal is used for controlling the channel selection circuit to work or not work.
  4. 4. A charge activation circuit as claimed in claim 1 or 2, characterized in that, The first condition includes the voltage of the first voltage source increasing to greater than or equal to a first threshold voltage and the voltage of the first voltage source decreasing to less than the first threshold voltage and greater than a second threshold voltage; The voltage detection circuit is further configured to output an invalid level when the voltage of the first voltage source satisfies a second condition, the second condition including that the voltage of the first voltage source increases to be greater than the second threshold voltage and less than the first threshold voltage, and that the voltage of the first voltage source decreases to be less than the second threshold voltage, the invalid level being a level at which the activation signal generation circuit is disabled.
  5. 5. The charge activation circuit of claim 4, wherein the charge activation circuit, The voltage detection circuit comprises a voltage comparison circuit; the voltage comparison circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor and an AND gate; the first end of the first resistor is used for being connected with a second voltage source, and the second end of the first resistor is connected with a first node; The first end of the second resistor is connected with the first node, and the second end of the second resistor is grounded; the first end of the third resistor is used for being connected with the first voltage source, and the second end of the third resistor is connected with the second node; the first end of the fourth resistor is connected with the second node, and the second end of the fourth resistor is grounded; The first input end of the AND gate is connected with the first node, the second input end of the AND gate is connected with the second node, and the output end of the AND gate is the output end of the voltage comparison circuit.
  6. 6. The charge activation circuit of claim 4, wherein the charge activation circuit, The voltage detection circuit comprises a voltage comparison circuit; the voltage comparison circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a diode and an AND gate; the first end of the first resistor is used for being connected with a second voltage source, and the second end of the first resistor is connected with a first node; The first end of the second resistor is connected with the first node, and the second end of the second resistor is grounded; The anode of the diode is connected with the first voltage source, and the cathode of the diode is connected with the first end of the third resistor; The second end of the third resistor is connected with a second node; the first end of the fourth resistor is connected with the second node, and the second end of the fourth resistor is grounded; The first input end of the AND gate is connected with the first node, the second input end of the AND gate is connected with the second node, and the output end of the AND gate is the output end of the voltage comparison circuit.
  7. 7. A charge activation circuit as claimed in claim 5 or 6, characterized in that, The voltage comparison circuit also comprises a voltage stabilizing tube; And the anode of the voltage stabilizing tube is grounded, and the cathode of the voltage stabilizing tube is connected with the second node.
  8. 8. A charge activation circuit as claimed in claim 5 or 6, characterized in that, The voltage detection circuit further comprises an output circuit; The output circuit comprises a fifth resistor, a sixth resistor and a first transistor; The first end of the fifth resistor is used for being connected with a second voltage source, and the second end of the fifth resistor is connected with a third node; the first end of the sixth resistor is connected with the output end of the voltage comparison circuit, and the second end of the sixth resistor is connected with the fourth node; the first electrode of the first transistor is connected with the third node, and the second electrode of the first transistor is grounded; the third node is connected with the activation signal generation circuit.
  9. 9. The charge activation circuit of claim 8, wherein the charge activation circuit, The output circuit further comprises a seventh resistor and a first capacitor; the first end of the seventh resistor is connected with the fourth node, and the second end of the seventh resistor is grounded; The first polar plate of the first capacitor is connected with the fourth node, and the second polar plate of the first capacitor is grounded.
  10. 10. The charge activation circuit of claim 2, wherein the charge activation circuit comprises, The frequency dividing circuit is a frequency dividing chip.
  11. 11. The charge activation circuit of claim 2, wherein the charge activation circuit comprises, The timing duration control signal is multi-bit; The signal holding circuit includes a plurality of signal holding units; Each of the plurality of signal holding units corresponds one-to-one with each bit of the timing duration control signal.
  12. 12. The charge activation circuit of claim 11, wherein the charge activation circuit, The signal holding unit includes an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a second transistor, a second capacitor, a third capacitor, and a third transistor; The first end of the eighth resistor is connected with a fifth node, and the second end of the eighth resistor is connected with a sixth node; A first end of the ninth resistor is connected with the sixth node, and a second end of the ninth resistor is grounded; The first polar plate of the second capacitor is connected with the sixth node, and the second polar plate of the second capacitor is grounded; A control electrode of the second transistor is connected with the sixth node, a first electrode of the second transistor is connected with a first end of the tenth resistor, and a second electrode of the second transistor is grounded; the second end of the tenth resistor is connected with an eighth node; The control electrode of the third transistor is connected with the eighth node, the first electrode of the third transistor is connected with a seventh node, and the second electrode of the third transistor is connected with a ninth node; the first end of the eleventh resistor is connected with the seventh node, and the second end of the eleventh resistor is connected with the eighth node; the first polar plate of the third capacitor is connected with the seventh node, and the second polar plate of the third capacitor is connected with the eighth node; a first end of a twelfth resistor is connected with the ninth node, and a second end of the twelfth resistor is grounded; A first end of the thirteenth resistor is connected with the ninth node; a second end of the thirteenth resistor is connected with the fifth node; the ninth node is connected with the channel selection circuit as an output end of the signal holding unit.
  13. 13. A photovoltaic charging system, comprising: A photovoltaic input source; a device to be activated; the charge activation circuit of any one of claims 1-12, said photovoltaic input source being a first voltage source in said charge activation circuit.

Description

Charging activation circuit and photovoltaic charging system Technical Field The present disclosure relates to the field of photovoltaic charging technologies, and more particularly, to a charging activation circuit and a photovoltaic charging system. Background The solar panel converts solar energy into electric energy by absorbing sunlight, and after the solar energy of the solar panel is converted into electric energy, the converted electric energy needs to be stored in an energy storage power supply or power supply equipment. In the working process of the solar cell panel, if the conditions of shade or cloudiness shielding sunlight or working at night exist, the voltage output of the solar cell panel is not stable. For example, in the early morning or in the cloudy day, the solar panel outputs a weak voltage that activates the energy storage power supply, but the actual output power is insufficient to support the system charging, resulting in consumption of energy inside the energy storage power supply, and more seriously, the energy in the energy storage power supply is consumed until it is discarded. Therefore, a need exists for a charge activation circuit that can cope with complex weather changes. Disclosure of Invention The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims. The present disclosure provides a charging activation circuit and a photovoltaic charging system. The embodiment of the disclosure provides a charging activation circuit, which is applied to equipment to be charged, and comprises: The controller is used for setting an activation control signal when the equipment to be charged is controlled to be powered off, and sending the activation control signal to the signal holding circuit to sleep; The signal holding circuit is connected with the controller and is used for holding an activation control signal; the voltage detection circuit is used for acquiring the voltage of the first voltage source, and outputting an effective level when the voltage of the first voltage source meets a first condition, wherein the effective level is a level enabling the activation signal generation circuit to work; the activation signal generation circuit is respectively connected with the voltage detection circuit and the signal holding circuit, and is configured to generate an activation signal according to an activation control signal held by the signal holding circuit and send the activation signal to the controller when the voltage detection circuit outputs an effective level; The controller is further configured to wake up each time the activation signal is received, control the first voltage source to charge the device to be charged when the charging condition is determined to be met, reset the activation control signal when the charging condition is determined not to be met and the device to be charged is prepared to sleep again, and send the reset activation control signal to the signal holding circuit to sleep. In an exemplary embodiment, the activation control signal comprises a timing duration control signal, wherein the timing duration control signal is M bits, and M is a natural number; the activation signal generation circuit comprises a frequency division circuit and a channel selection circuit, wherein the channel selection circuit is provided with A plurality of channels; The frequency dividing circuit is respectively connected with the voltage detection circuit and the channel selection circuit and is used for outputting N square wave signals with different frequencies when the voltage detection circuit outputs an effective level; the channel selection circuit is respectively connected with the frequency division circuit and the signal holding circuit, is arranged to select a corresponding channel according to the timing duration control signal, and outputs a square wave signal transmitted by the selected channel as the activation signal; Wherein when N is the same as theN channels in the channels are in one-to-one correspondence with the N square wave signals; When (when) N is the same as theA plurality of channels and one of the N square wave signalsThe square wave signals are in one-to-one correspondence. In an exemplary embodiment, the activation control signal further comprises a circuit enable control signal; The circuit enable control signal is used for controlling the channel selection circuit to work or not work. In an exemplary embodiment, the first condition includes the voltage of the first voltage source increasing to greater than or equal to a first threshold voltage and the voltage of the first voltage source decreasing to less than the first threshold voltage and greater than a second threshold voltage; The voltage detection circuit is further configured to output an invalid level when the voltage of the first voltage source satisfies a second condition, the second condition including t