Charging control circuit, system and equipment

Abstract

The utility model relates to a charging control circuit, system and device, and the circuit comprises a current detection module, a comparator module, and a main control module, the current detection module monitors a charging current, outputs a detection signal to the comparator module, processes the detection signal through the comparator module, and outputs a control signal corresponding to the charging current to the main control module. Detecting the control signal through the main control module, and determining whether to start a delay function according to a detection result; if the time delay function is started, under the condition that the time delay duration reaches the preset time duration threshold value, the control operation corresponding to the control signal detected again is determined, the control operation is responded, the heat dissipation device is controlled to work according to the control operation after a certain time delay, intelligent control over charging heat dissipation is achieved, and the service life of the heat dissipation device is prolonged. The charging heat dissipation control is automatic, so that the power consumption of a charging product can be effectively reduced, and the user experience is improved.

Description

Technical Field

[0001] This application relates to the field of wireless charging technology, and in particular to a charging control circuit, system, and device. Background Technology

[0002] In wireless charging products, heat dissipation and charging time have always been headaches. Existing technologies mainly employ cooling methods such as active fan cooling and cooling pads combined with fans for enhanced heat dissipation. However, these methods have several issues. Specifically, whenever a smart device, such as a mobile phone, is connected to the wireless charger, cooling devices like fans and cooling pads are always working. However, these cooling devices are not needed at the beginning of charging, and users need to use a physical button to turn them off. Currently, while some mobile phones send a full-charge signal to the wireless charging dock after being fully charged, triggering the cooling pads and fans in the dock to stop working, this signal is not sent every time, and the timing of each signal transmission is uncertain. Furthermore, most mobile phones do not send a full-charge signal to the wireless charging dock, meaning the cooling pads and fans continue to operate even after the phone is fully charged, resulting in high power consumption due to heat dissipation issues. Utility Model Content

[0003] In view of this, this application provides a charging control circuit, system, and device to solve the problem of high power consumption in existing related technologies due to the inability to intelligently dissipate heat.

[0004] In a first aspect, embodiments of this application provide a current detection module, a comparator module, and a main control module;

[0005] The input terminal of the current detection module is connected to the power circuit of the charging device, the output terminal of the current detection module is electrically connected to the first input terminal of the comparator module, the second input terminal of the comparator module is electrically connected to the first power supply terminal of the charging control circuit, and the output terminal of the comparator module is electrically connected to the input terminal of the main control module.

[0006] The current detection module is used to detect the charging current of the power circuit and output a detection signal to the comparator module based on the charging current.

[0007] The comparator module is used to compare the first threshold signal provided by the first power supply with the detection signal, and output a control signal corresponding to the charging current to the main control module.

[0008] The main control module is used to detect the control signal and determine whether to activate the delay function based on the detection result. If the delay function is activated, the module determines the control operation corresponding to the re-detected control signal when the delay duration reaches a preset duration threshold, and controls the operation of the heat dissipation device in response to the control operation corresponding to the control signal.

[0009] Optionally, the current detection module includes: an amplifier, a first resistor, and a second resistor;

[0010] The first input terminal of the amplifier is electrically connected to the detection terminal of the current detection module. The second input terminal of the amplifier, the first end of the first resistor, and the second end of the second resistor are electrically connected. The second end of the first resistor is electrically connected to the reference ground of the charging control circuit. The first end of the second resistor, the output terminal of the amplifier, and the output terminal of the current detection module are electrically connected.

[0011] Optionally, the current detection module may further include a third resistor and a fourth resistor;

[0012] The first end of the third resistor is electrically connected to the detection end of the current detection module, the second end of the third resistor, the second end of the fourth resistor and the first input end of the amplifier are electrically connected, and the first end of the fourth resistor is electrically connected to the second power supply end of the charging control circuit.

[0013] Optionally, the current detection module may further include a fifth resistor and a first capacitor;

[0014] The first end of the fifth resistor is electrically connected to the output of the amplifier, the second end of the fifth resistor, the first end of the first capacitor, and the output of the comparator module are electrically connected, and the second end of the first capacitor is electrically connected to the reference ground.

[0015] Optionally, the current detection module further includes a second capacitor, the first end of which is electrically connected to the first input terminal of the amplifier, and the first end of which is electrically connected to the reference ground.

[0016] Optionally, the comparator module includes a comparator and a sixth resistor;

[0017] The first terminal of the comparator is electrically connected to the output terminal of the current detection module through the sixth resistor, the second terminal of the comparator is electrically connected to the first power supply terminal of the charging control circuit, and the output terminal of the comparator is electrically connected to the input terminal of the main control module.

[0018] Optionally, the comparator module may further include a seventh resistor, an eighth resistor, and a diode;

[0019] The first terminal of the seventh resistor, the second terminal of the comparator, the first terminal of the diode, and the second terminal of the eighth resistor are electrically connected together. The first terminal of the eighth resistor is electrically connected to the first power supply terminal, and the second terminal of the seventh resistor, the second terminal of the diode, and the reference ground of the charging control circuit are electrically connected together.

[0020] Optionally, the comparator module further includes a ninth resistor, a tenth resistor, and a third capacitor;

[0021] The first terminal of the third capacitor, the power supply terminal of the comparator, the first terminal of the ninth resistor, and the first power supply terminal are electrically connected. The first terminal of the second resistor, the output terminal of the comparator, and the first terminal of the tenth resistor are electrically connected. The second terminal of the tenth resistor is electrically connected to the input terminal of the main control module. The second terminal of the third capacitor, the ground terminal of the comparator, and the reference ground are electrically connected.

[0022] Secondly, embodiments of this application provide a charging control system, including the charging control circuit as described in any of the first aspects.

[0023] Thirdly, embodiments of this application provide a charging control device, which includes the charging control circuit described in the second aspect of this application.

[0024] The charging control circuit, system, and device provided in this application include a current detection module, a comparator module, and a main control module. The input terminal of the current detection module is connected to the power circuit of the charging device, enabling the current detection module to monitor the charging current of the power circuit and output a detection signal to the comparator module. The comparator module compares the detection signal with a threshold signal and outputs a control signal corresponding to the charging current to the main control module. Subsequently, the main control module detects the control signal to determine whether to activate the delay function based on the detection result. If the delay function is activated, when the delay duration reaches a preset threshold, the control operation corresponding to the re-detected control signal is determined, and the control operation corresponding to the control signal is responded to. After a certain delay, the operation of the heat dissipation device is controlled according to the control operation, realizing intelligent control of charging heat dissipation and automating the charging heat dissipation control, thereby effectively reducing the power consumption of charging products and improving the user experience. Attached Figure Description

[0025] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0028] Figure 1 A structural block diagram of a charging control circuit provided in an embodiment of this application;

[0029] Figure 2 A schematic diagram of a charging control circuit provided in an optional embodiment of this application;

[0030] Figure 3 A schematic diagram of a charging control circuit provided in another optional embodiment of this application;

[0031] Figure 4 A schematic diagram of a charging control circuit provided as an example of this application;

[0032] Figure 5 This is a schematic diagram of the structure of a charging control system provided in an embodiment of this application;

[0033] Figure 6 This application provides a schematic diagram of the control flow of a charging control system as an example.

[0034] Figure 7 This is a structural block diagram of a charging control device provided in an embodiment of this application. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0037] To address the high power consumption issue caused by the lack of intelligent heat dissipation in existing wireless charging technologies, embodiments of this application provide a charging control circuit, system, and device that achieves intelligent control of charging heat dissipation, automates the charging heat dissipation control, and thus effectively reduces the power consumption of charging products and improves the user experience.

[0038] Figure 1 This is a structural block diagram of a charging control circuit for a controller provided in an embodiment of this application. Figure 1 As shown, the charging control circuit provided in this embodiment may specifically include: a current detection module 110, a comparator module 120, and a main control module 130; wherein, the output terminal of the current detection module 110 is electrically connected to the first input terminal of the comparator module 120, the second input terminal of the comparator module 120 is electrically connected to the first power supply terminal V1 of the charging control circuit, and the output terminal of the comparator module 120 is electrically connected to the input terminal of the main control module 130; the current detection module 110 is used to detect the charging current and output a detection signal to the comparator module 120 based on the charging current; to match the operation of the comparator module 120, the current detection module 110 processes the charging current, for example: amplification. The signal is processed, filtered, or converted into a voltage signal, and the processed signal can be used as a detection signal and output to the comparator module 120. The comparator module 120 is used to compare the first threshold signal provided by the first power supply terminal V1 with the detection signal, and outputs a control signal corresponding to the charging current to the main control module 130. The main control module 130 is used to receive the control signal, and can also detect the control signal, determine whether to activate the delay function based on the detection result. If the delay function is activated, then when the delay duration reaches a preset duration threshold, the control operation corresponding to the re-detected control signal is determined, and the working state of the heat dissipation device is controlled in response to the control operation corresponding to the control signal. The above detection signal and control signal can be a current signal, a voltage signal, or other signal types that can achieve the above functions.

[0039] Optionally, the detection input terminal of the current detection module 110 can be connected to the power circuit of the charging device, such as a wireless charging power circuit or a wired charging power circuit, to perform current detection on the charging power circuit. Figure 2 As shown, the charging current can be detected and amplified to generate a detection signal. The output of the current detection module 110 is electrically connected to the first input of the comparator module 120, allowing the current detection module 110 to output the detection signal to the comparator module 120. The comparator module 120 processes the detection signal and outputs a control signal to the main control module 130. The main control module 130 receives the control signal and detects it to determine whether to activate the delay function. If the delay function is activated, the received control signal is re-detected when the delay duration reaches a preset threshold. The control operation is then determined based on the re-detected control signal, and the response to the control operation is executed, thereby intelligently controlling the operation of the heat dissipation device. The preset threshold duration refers to a time threshold set in advance for the delay duration, typically 60 seconds or more. Depending on the actual situation, 90 seconds, 120 seconds, 180 seconds, or other times can be selected, without specific limitations. For example, when the control operation is set to "off", the heat dissipation device is turned off to avoid unnecessary power consumption caused by activating the heat dissipation device when charging is not required; while when the control operation is set to "on", the heat dissipation device is activated to enable heat dissipation during charging, thereby realizing intelligent and automated heat dissipation during charging, reducing the power consumption of charging products and improving the user experience.

[0040] As can be seen, the charging control circuit provided in this application embodiment detects the charging current through the current detection module 110 and outputs a detection signal to the comparator module 120 based on the charging current. This allows the comparator OP2 module to output a control signal corresponding to the charging current to the main control module 130 based on the first power supply voltage provided by the first power supply terminal V1 and the detection signal. The main control module 130 can receive the control signal and, after a delay of up to a preset time threshold, re-detect the control signal to determine the control operation based on the re-detected control signal. In response to the control operation, it controls the operation of the heat dissipation device, thereby realizing intelligent control of charging heat dissipation. This avoids the situation where the heat dissipation device is activated when charging heat dissipation is not required, solving the problem of high power consumption caused by activating the heat dissipation device when charging heat dissipation is not required in existing related technologies. This effectively reduces the power consumption of charging products and improves the user experience.

[0041] In some optional embodiments of this application, the current detection module 110 can amplify the detected charging current using an amplifier, and output the amplified current signal as a detection signal to the comparator module 120. This allows the charging state to be determined based on the detection signal, and subsequently, the decision to shut down the heat dissipation device can be made based on the charging state. This achieves intelligent and automated charging heat dissipation, reducing the power consumption of the charging product. Optionally, the current detection module 110 in this embodiment may include an amplifier OP1, a first resistor R1, and a second resistor R2, such as... Figure 2 As shown, the first input terminal of amplifier OP1 is electrically connected to the detection terminal of current detection module 110. The second input terminal of amplifier OP1, the first terminal of the first resistor R1, and the second terminal of the second resistor R2 are electrically connected. The second terminal of the first resistor R1 is electrically connected to the reference ground of the charging control circuit. The first terminal of the second resistor R2, the output terminal of amplifier OP1, and the output terminal of current detection module 110 are electrically connected. A current amplification circuit is formed by amplifier OP1, first resistor R1, and second resistor R2. The detected charging current can be amplified by the current amplification circuit to generate a detection signal, which is output to comparator module 120. The comparator module 120 can output a control signal corresponding to the charging current to main control module 130 based on the first power supply voltage provided by the first power supply terminal V1 and the detection signal.

[0042] The resistance values ​​of the first resistor R1 and the second resistor R2 can be set according to actual needs, and this application embodiment does not impose specific restrictions on this.

[0043] Optionally, in addition to amplifier OP1, first resistor R1 and second resistor R2, the current detection module 110 in this application embodiment may also include other circuit elements, such as voltage divider resistors, so that amplifier OP1 can be in a reasonable working state through the voltage divider resistors. This application embodiment does not impose specific limitations on this.

[0044] Optionally, the current detection module 110 in this embodiment may further include a third resistor R3 and a fourth resistor R4, such as... Figure 3As shown, the first end of the third resistor R3 is electrically connected to the detection terminal of the current detection module 110, so that the first end of the third resistor R3 can serve as the detection terminal of the current detection module 110. The second end of the third resistor R3, the second end of the fourth resistor R4, and the first input terminal of the amplifier OP1 are electrically connected. The first end of the fourth resistor R4 is electrically connected to the second power supply terminal V2 of the charging control circuit. The second power supply terminal V2 of the charging control circuit can serve as the bias voltage terminal of the current detection module 110 to provide a bias voltage and increase the voltage value. The third resistor R3 and the fourth resistor R4 serve as voltage divider resistors, so that the amplifier OP1 can be in a reasonable working state.

[0045] Optionally, the current detection module 110 may also include a fifth resistor R5 and a first capacitor C1, to form an RC filter circuit to filter the signal and ensure the accuracy of the output detection signal. Figure 3 As shown, the first end of the fifth resistor R5 is electrically connected to the output terminal of the amplifier OP1, and the second end of the fifth resistor R5, the first end of the first capacitor C1, and the output terminal of the comparator module 120 are electrically connected. The second end of the first capacitor C1 is electrically connected to the reference ground, so that the detection signal output by the amplifier OP1 can be filtered by the RC filter circuit composed of the fifth resistor R5 and the first capacitor C1 before being transmitted to the comparator module 120. In this way, the comparator module 120 can output a control signal to the main control module 130 according to the detection signal.

[0046] Optionally, a filter capacitor can also be provided in the current detection module 110 to filter the charging current and reduce environmental interference. In some optional embodiments of this application, the current detection module 110 further includes a second capacitor C2, such as... Figure 3 As shown, the first end of the second capacitor C2 is electrically connected to the first input terminal of the amplifier OP1, and the first end of the second capacitor C2 is electrically connected to the reference ground of the charging control circuit, so that the second capacitor C2 can be used as a filter capacitor of the amplifier OP1 to filter the charging current signal input to the amplifier OP1, thereby reducing environmental interference.

[0047] In some optional embodiments of this application, the comparator module 120 can process the detection signal output by the current detection module 110 through comparator OP2 to determine the charging state based on the detection signal, thereby outputting a control signal corresponding to the charging current to the main control module 130 according to the charging state. Figure 3As shown, when the comparator module 120 includes comparator OP2 and a sixth resistor R6, the first terminal of comparator OP2 is electrically connected to the output terminal of the current detection module 110 through the sixth resistor R6, so that the detection signal can be transmitted to comparator OP2 through the sixth resistor R6. The second terminal of comparator OP2 is electrically connected to the first power supply terminal V1 of the charging control circuit. The first power supply terminal V1 provides a first threshold signal to the second terminal of comparator OP2. The detection signal is compared with the first threshold signal to determine the current charging state based on the comparison result. If the detection signal is greater than the first threshold signal, it is considered that the current charging current has not reached the current detection set point, and therefore the current charging state is considered to be incomplete. Conversely, if the voltage of the current detection signal is not greater than the preset voltage threshold corresponding to the current detection point, it is considered that the current charging current has reached the current detection set point, and therefore the current charging state is considered to be incomplete. The current charging state is fully charged, and the output of comparator OP2 is electrically connected to the input of the main control module 130, so that the output of comparator OP2 can be used as the output of comparator module 120. This allows comparator module 120 to output a control signal corresponding to the charging current through the output of comparator OP2, based on the charging state. This control signal can be transmitted to the main control module 130, allowing the main control module 130 to detect the received control signal and determine whether to activate the delay function based on the detection result. If the delay function is activated, and the delay duration reaches a preset threshold, the currently received control signal is re-detected to determine the control operation and respond to it, thereby controlling the operation of the heat dissipation device, i.e., controlling whether the heat dissipation device is turned on or off. This achieves intelligent and automated charging heat dissipation.

[0048] In some optional embodiments of this application, the comparator module 120 may include other circuit devices in addition to comparator OP2 and sixth resistor R6, such as a seventh resistor, an eighth resistor, a diode, etc. The embodiments of this application do not impose specific limitations on this.

[0049] In one alternative embodiment of this application, such as Figure 4As shown, the first end of the seventh resistor R7, the second end of the comparator OP2, the first end of the diode D1, and the second end of the eighth resistor R8 are electrically connected. The first end of the eighth resistor R8 is electrically connected to the first power supply terminal V1 of the charging control circuit, and the second ends of the seventh resistor R7 and the second ends of the diode D1 are both electrically connected to the reference ground of the charging control circuit. The eighth resistor R8 and the diode D1 form a threshold circuit, which can provide a first threshold signal to the second end of the comparator OP2 based on the first power supply voltage provided by the first power supply terminal V1. This allows the comparator OP2 to compare the voltage at the second end of the comparator OP2 with the voltage at the first end of the comparator OP2, and output a corresponding control signal based on the comparison result. The main control module 130 can then determine the charging state based on the control signal.

[0050] As can be seen, in this embodiment, comparator OP2 compares the signals at the first and second terminals to determine the charging state. Optionally, if the voltage at the first terminal of comparator OP2 is less than the voltage at the third terminal, the output of comparator OP2 outputs a high-level signal as a control signal, which is transmitted to the main control module 130, allowing the main control module 130 to determine that the current charging state is fully charged. Conversely, if the voltage at the first terminal of comparator OP2 is not less than the voltage at the third terminal, a low-level signal is output as a control signal, which is transmitted to the main control module 130, allowing the main control module 130 to determine that the current charging state is not fully charged. Furthermore, the main control module 130 can re-detect the control signal when the delay time reaches a preset threshold, and determine a control operation based on the re-detected control signal. Subsequently, in response to the control operation, it controls the operation of the heat dissipation device, that is, after a certain delay, it determines whether to turn off the heat dissipation device based on the charging state, thereby realizing intelligent and automated charging heat dissipation, reducing the power consumption of the charging product, and improving the user experience.

[0051] Optionally, the comparator module 120 in this embodiment may further include a ninth resistor R9, a tenth resistor R10, and a third capacitor C3, such as... Figure 4As shown, the first terminal of the third capacitor C3, the power supply terminal V+ of the comparator OP2, the first terminal of the ninth resistor R9, and the first power supply terminal V1 are electrically connected. The first terminal of the second resistor R2, the output terminal of the comparator OP2, and the first terminal of the tenth resistor R10 are electrically connected. The second terminal of the tenth resistor R10 is electrically connected to the input terminal of the main control module 130, so that the control signal output by the comparator OP2 is transmitted to the main control module 130 through the tenth resistor R10. The second terminal of the third capacitor C3 and the ground terminal V- of the comparator OP2 are both connected to the reference ground of the charging control circuit, so that the comparator module 120 can use the level signal output by the comparator OP2 as a control signal.

[0052] In some optional embodiments of this application, the heat dissipation device may include, but is not limited to, one or more of the following: a fan, a cooling chip, a thermoelectric cooler (TEC), etc. The embodiments of this application do not limit this.

[0053] Of course, the charging control circuit provided in this application embodiment may include not only the current detection module 110, comparator module 120, and main control module 130, but also other functional modules such as a fan power supply module and a TEC power supply module. This application embodiment does not impose any limitations on this. The fan power supply module can be used to supply power to the fan, enabling the fan to operate based on the electrical energy output by the fan power supply module; the TEC power supply module can be used to supply power to the thermoelectric cooler, enabling the thermoelectric cooler to cool based on the electrical energy output by the TEC power supply module, thus achieving charging heat dissipation.

[0054] In a specific implementation, the charging control circuit provided in this application embodiment can be applied to a charging control system, enabling the charging control system to detect the charging current through the current detection module 110 and output a detection signal to the comparator module 120 based on the charging current. This allows the comparator OP2 module to output a control signal corresponding to the charging current to the main control module 130 based on the first power supply voltage provided by the first power supply terminal V1 and the detection signal. The main control module can then detect this control information and determine whether to activate the delay function based on the detection result. If the delay function is activated, the control signal is re-detected when the delay duration reaches a preset time threshold. The control operation is then determined based on the re-detected control signal. Subsequently, in response to the control operation corresponding to the control signal, the heat dissipation device is controlled according to the control operation after a certain delay time. This achieves intelligent control of charging heat dissipation, avoiding the situation where the heat dissipation device is activated when charging heat dissipation is not required, and solving the problem of high power consumption caused by activating the heat dissipation device when charging heat dissipation is not required in existing related technologies.

[0055] like Figure 5 As shown, this application provides a charging control system 500, which includes a charging control circuit 510. The charging control circuit 510 can be any of the charging control circuits described in the above embodiments of this application. The charging control system 500 can detect the charging current, generate a detection signal, determine the charging state based on the detection signal, and process the detection signal through a comparator module 120 to determine whether the heat dissipation device needs to be turned off based on the charging state. The comparator module 120 outputs a control signal corresponding to the charging state to the main control module 130, so that the main control module 130 detects the control signal and determines whether to activate the delay function based on the detection result. If the delay function is activated, when the delay time reaches a preset time threshold, the control operation corresponding to the re-detected control signal is determined, and the control operation is responded to. That is, after a certain delay after being triggered by the control signal, the heat dissipation device is controlled, thereby realizing intelligent control of charging heat dissipation and solving the problem of high power consumption caused by activating the heat dissipation device when charging heat dissipation is not required in the prior art.

[0056] As an example of this application, the charging control circuit provided in this embodiment can be applied to mobile phone wireless charging scenarios, such as when the phone is fully charged or nearly fully charged but has not sent a full charge message, i.e., when wireless charging is supplying power to the phone. Figure 6 As shown, it can be determined that the wireless charger is under load at this time, and the charging current of the mobile phone can be detected. That is, the current detection module 110 performs current detection on the wireless charging power circuit to detect the magnitude of the resonant cavity current of the wireless charging power circuit, and the detected resonant cavity current can be used as the charging current. Based on the magnitude of the resonant cavity current, a detection signal is output to the comparator OP2 in the comparator module 120, so that the comparator OP2 processes the detection signal to determine the charging status of the mobile phone, and confirms whether the cooling chip and fan need to be turned off based on the charging status.

[0057] Specifically, in the case of wireless charging with load, the charging control circuit provided in this application embodiment can detect the charging current of the mobile phone to determine whether the charging current has reached the current detection set point. If the detected signal is less than the first threshold signal, it is considered that the charging current has not reached the current detection set point, and a first control signal is output. If the detected signal is greater than or equal to the first threshold signal, it is considered that the charging current has reached the current detection set point, and a second control signal is output. Subsequently, the main control module 130 triggers a delay action after receiving the first control signal, i.e., main control delay. Specifically, after the main control module 130 is triggered by the first control signal, it delays for a certain period of time, and then determines whether to shut down the cooling chip and fan based on the delayed control signal. Specifically, after a certain delay, the main control module 130 re-determines whether the charging current has reached the current detection set point based on the received control signal. If the main control module 130 receives the first control signal at this time, indicating that the charging current has not yet reached the current detection set point, it can turn off the fan and the cooling chip. If the main control module 130 receives the second control signal at this time, indicating that the charging current has reached the current detection set point, it does not turn off the fan and the cooling chip, thus achieving intelligent and automated heat dissipation for wireless charging, effectively reducing the power consumption of the charging product and improving the user experience. The delay time can be set to 60 seconds or 120 seconds; this example does not impose any restrictions on this.

[0058] For example, when a phone is out of power, it can be charged via wireless charging. During wireless charging operation, the system can determine whether the wireless charger is under load. If it is not under load, the wireless charger can enter standby mode. If it is under load, the fan and cooling coil will activate, thus starting the heat dissipation device. Then, the system can determine whether the load on the wireless charger has been removed to decide whether phone charging current detection is necessary. If the load has been removed, the wireless charger is considered unloaded, and the fan and cooling coil can be turned off to save power. If the load has not been removed, the wireless charger is considered under load, and phone charging current detection can be performed. Based on the detected phone charging current, it can be determined whether a current detection setpoint has been reached. If the phone charging current reaches the current detection setpoint, the main control module 130 will delay for a certain period after the current signal is triggered, and then shut down the cooling coil and fan. This reduces product power consumption, improves the product's automation level and user experience, and enhances its technological appeal.

[0059] like Figure 7As shown, this application embodiment also provides a charging control device 700, which includes the charging control system 500 in any of the above embodiments. The charging control device can detect the charging current and generate a detection signal to determine the charging status based on the detection signal. The detection signal can be processed by the comparator module 120 to determine whether the heat dissipation device needs to be turned off based on the charging status. When the continuous duration of the control signal reaches a preset delay duration, the device responds to the control operation corresponding to the control signal, that is, after the control signal is triggered, the heat dissipation device is controlled after a certain delay. This realizes intelligent control of charging heat dissipation and solves the problem of high power consumption caused by starting the heat dissipation device when charging heat dissipation is not required in the existing related technologies.

[0060] The system and device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0061] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a general-purpose hardware platform, or of course by hardware.

[0062] Based on this understanding, the above technical solutions, or the parts that contribute to the relevant technologies, can be embodied in the form of software products. These computer software products can be stored in computer-readable storage media, such as ROM / RAM, magnetic disks, optical disks, etc., and include several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in various embodiments or some parts of the embodiments.

[0063] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0064] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A charging control circuit, characterized in that, include: Current detection module, comparator module, and main control module; The input terminal of the current detection module is connected to the power circuit of the charging device, the output terminal of the current detection module is electrically connected to the first input terminal of the comparator module, the second input terminal of the comparator module is electrically connected to the first power supply terminal of the charging control circuit, and the output terminal of the comparator module is electrically connected to the input terminal of the main control module. The current detection module is used to detect the charging current of the power circuit and output a detection signal to the comparator module based on the charging current. The comparator module is used to compare the first threshold signal provided by the first power supply terminal with the detection signal, and output a control signal corresponding to the charging current to the main control module. The main control module is used to detect the control signal and determine whether to activate the delay function based on the detection result. If the delay function is activated, the module determines the control operation corresponding to the re-detected control signal when the delay duration reaches a preset duration threshold, and controls the operation of the heat dissipation device in response to the control operation.

2. The charging control circuit according to claim 1, characterized in that, The current detection module includes: an amplifier, a first resistor, and a second resistor; The first input terminal of the amplifier is electrically connected to the detection terminal of the current detection module. The second input terminal of the amplifier, the first end of the first resistor, and the second end of the second resistor are electrically connected. The second end of the first resistor is electrically connected to the reference ground of the charging control circuit. The first end of the second resistor, the output terminal of the amplifier, and the output terminal of the current detection module are electrically connected.

3. The charging control circuit according to claim 2, characterized in that, The current detection module may also include a third resistor and a fourth resistor; The first end of the third resistor is electrically connected to the detection end of the current detection module, the second end of the third resistor, the second end of the fourth resistor and the first input end of the amplifier are electrically connected, and the first end of the fourth resistor is electrically connected to the second power supply end of the charging control circuit.

4. The charging control circuit according to claim 2, characterized in that, The current detection module also includes a fifth resistor and a first capacitor; The first end of the fifth resistor is electrically connected to the output of the amplifier, the second end of the fifth resistor, the first end of the first capacitor, and the output of the comparator module are electrically connected, and the second end of the first capacitor is electrically connected to the reference ground.

5. The charging control circuit according to claim 2, characterized in that, The current detection module further includes a second capacitor, the first end of which is electrically connected to the first input terminal of the amplifier, and the first end of which is electrically connected to the reference ground.

6. The charging control circuit according to claim 1, characterized in that, The comparator module includes a comparator and a sixth resistor; The first terminal of the comparator is electrically connected to the output terminal of the current detection module through the sixth resistor, the second terminal of the comparator is electrically connected to the first power supply terminal of the charging control circuit, and the output terminal of the comparator is electrically connected to the input terminal of the main control module.

7. The charging control circuit according to claim 6, characterized in that, The comparator module also includes a seventh resistor, an eighth resistor, and a diode; The first terminal of the seventh resistor, the second terminal of the comparator, the first terminal of the diode, and the second terminal of the eighth resistor are electrically connected together. The first terminal of the eighth resistor is electrically connected to the first power supply terminal, and the second terminal of the seventh resistor, the second terminal of the diode, and the reference ground of the charging control circuit are electrically connected together.

8. The charging control circuit according to claim 1, characterized in that, The comparator module also includes a ninth resistor, a tenth resistor, and a third capacitor; The first terminal of the third capacitor, the power supply terminal of the comparator, the first terminal of the ninth resistor, and the first power supply terminal are electrically connected. The first terminal of the second resistor, the output terminal of the comparator, and the first terminal of the tenth resistor are electrically connected. The second terminal of the tenth resistor is electrically connected to the input terminal of the main control module. The second terminal of the third capacitor, the ground terminal of the comparator, and the reference ground are electrically connected.

9. A charging control system, characterized in that, It includes the charging control circuit as described in any one of claims 1 to 8.

10. A charging control device, characterized in that, It includes the charging control system as described in claim 9.

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