A compatible powered visual doorbell

Abstract

The utility model discloses an embodiment discloses a kind of visual doorbell of compatible power supply, including the circuit board and the battery of chargeable being arranged in visual doorbell shell, solar panel is arranged on the surface of shell and is electrically connected with circuit board, bypass power supply circuit is integrated on the circuit board, bypass power supply circuit connects solar panel and chargeable battery;The bypass power supply circuit switches between adapter power-on and battery power-on according to whether external input adapter voltage;According to the charging enable signal of input, whether direct current generated by solar panel is used to charge battery is controlled.Compatible two power-on modes and solar power supply, can automatically switch according to external power supply and battery capacity, ensure that external power supply anomaly can also power on, solve the problem that existing power supply mode anomaly can affect doorbell normal work.

Description

Technical Field

[0001] This utility model relates to the field of electronic technology, and in particular to a video doorbell with compatible power supply. Background Technology

[0002] With increasing awareness of home security and the widespread adoption of the Internet of Things (IoT), users are demanding more video doorbells that require minimal maintenance, are environmentally friendly, and offer integrated functionality. Traditional video doorbells only support wired or battery power. Wired power requires pre-installed wiring on the door, making installation inconvenient, and the doorbell will not work during power outages. Battery power requires periodic battery removal for charging or replacement, which is inconvenient for users; if users don't notice low battery or no power, they cannot open the door, placing high demands on battery life and endurance.

[0003] Therefore, the existing technology still needs to be improved and enhanced. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a video doorbell with compatible power supply, thereby resolving the issue that abnormal power supply methods can affect the normal operation of the doorbell.

[0005] This utility model provides a compatible power supply video doorbell, including a circuit board and a rechargeable battery disposed inside the video doorbell housing, and also includes a solar panel disposed on the surface of the housing and electrically connected to the circuit board. The circuit board integrates a bypass power supply circuit, which connects the solar panel and the battery.

[0006] The bypass power supply circuit switches between powering on the adapter and powering on the battery depending on whether an adapter voltage is input externally; it also controls whether to use the DC power generated by the solar panel to charge the battery based on the input charging enable signal.

[0007] Optionally, in the video doorbell with compatible power supply, the bypass power supply circuit includes an interface module, an external power supply module, a battery power supply module, and a charging module; the interface module connects to the external power supply module, the battery power supply module, the charging module, and the battery; the external power supply module connects to the battery power supply module, and the charging module connects to the solar panel;

[0008] The interface module outputs the external adapter voltage and the internal battery voltage. The external power supply module outputs the adapter voltage to power on the battery. The battery power supply module stops powering on the battery when it detects the presence of adapter voltage and outputs the battery voltage to power on the battery when there is no adapter voltage. The charging module operates when the charging enable signal is valid and uses the adapter voltage or the DC power output from the solar panel to charge the battery.

[0009] Optionally, in the video doorbell with compatible power supply, the interface module includes a power interface and a battery interface. The power pin of the power interface is the power supply terminal for output adapter voltage. Pins 1 and 2 of the battery interface are both connected to the positive terminal of the battery and are the battery power supply terminals. Pin 3 of the battery interface is connected to the charging module and inputs the battery temperature signal. Pins 4, 5, G1, and G2 of the battery interface are all grounded.

[0010] Optionally, in the video doorbell with compatible power supply, the external power supply module includes a DIP switch, a first switching transistor, a second switching transistor, a first capacitor, and a first resistor;

[0011] Pin 1 of the DIP switch is connected to the gate of the first switching transistor and the battery power supply module; pin 2 of the DIP switch is grounded; pin 3 of the DIP switch is connected to the positive terminal of the battery; and the source of the first switching transistor is grounded. The drain of the first switching transistor is connected to one end of the first resistor, one end of the first capacitor, and the gate of the second switching transistor. The drain of the second switching transistor is connected to the system power supply terminal and the battery power supply module. The source of the second switching transistor is connected to the other end of the first resistor, the other end of the first capacitor, and the power supply pin of the power interface.

[0012] Optionally, in the video doorbell with compatible power supply, the external power supply module further includes a second resistor, a third resistor, and a fourth resistor; one end of the second resistor is connected to one end of the third resistor and the gate of the first switching transistor, the other end of the second resistor is grounded, the other end of the third resistor is connected to pin 1 of the DIP switch, one end of the fourth resistor is connected to the drain of the first switching transistor, and the other end of the fourth resistor is connected to one end of the first resistor and the gate of the second switching transistor.

[0013] Optionally, in the video doorbell with compatible power supply, the external power supply module further includes a second capacitor, a first diode, and a fifth resistor;

[0014] One end of the second capacitor is connected to one end of the first diode and pin 1 of the DIP switch. The other end of the second capacitor and the other end of the first diode are both grounded. The fifth resistor is connected between pin 3 of the DIP switch and the positive terminal of the battery.

[0015] Optionally, in the video doorbell with compatible power supply, the battery power supply module includes a third switch, a fourth switch, a second diode, a third capacitor, a sixth resistor, a seventh resistor, and an eighth resistor;

[0016] The gate of the third switch is connected to pin 1 of the DIP switch, and the source of the third switch is grounded; the drain of the third switch is connected to one end of the sixth resistor, one end of the seventh resistor, one end of the third capacitor, and the gate of the fourth switch; the drain of the fourth switch is connected to the system power supply terminal and the drain of the second switch; the source of the fourth switch is connected to the other end of the third capacitor, the other end of the seventh resistor, and the negative terminal of the second diode; the positive terminal of the second diode is connected to the positive terminal of the battery.

[0017] Optionally, in the video doorbell with compatible power supply, the charging module includes a charging chip, a positive contact, a negative contact, a fourth capacitor, a first inductor, an eleventh resistor, and a twelfth resistor.

[0018] The VIN pin of the charging chip is connected to one end of the fourth capacitor, one end of the eleventh resistor, and the power pin of the power interface; the other end of the eleventh resistor is connected to the positive terminal of the solar panel through the positive contact, and the negative contact is connected to the negative terminal of the solar panel and ground; the VGC pin of the charging chip is connected to the other end of the fourth capacitor; the NCE pin of the charging chip inputs the charging enable signal; the LX pin of the charging chip is connected to one end of the first inductor; the VS pin of the charging chip is connected to the other end of the first inductor and one end of the twelfth resistor; the other end of the twelfth resistor is connected to pin 1 of the battery interface; and the NTC pin of the charging chip is connected to pin 3 of the battery interface.

[0019] Optionally, in the video doorbell with compatible power supply, the charging module further includes a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, and a sixteenth resistor;

[0020] One end of the thirteenth resistor is connected to one end of the fourteenth resistor and the NCE pin of the charging chip. The other end of the fourteenth resistor is used to input the charging enable signal. One end of the fifteenth resistor is connected to one end of the sixteenth resistor and the NTC pin of the charging chip. The other end of the sixteenth resistor is connected to pin 3 of the battery interface. The other ends of the thirteenth resistor and the fifteenth resistor are both grounded.

[0021] Optionally, in the video doorbell with compatible power supply, the charging module further includes a first indicator light, a second indicator light, a seventeenth resistor, and an eighteenth resistor;

[0022] The positive terminal of the first indicator light is connected to the power pin of the power interface through the seventeenth resistor, and the negative terminal of the first indicator light is connected to the NCHRG pin of the charging chip. The positive terminal of the second indicator light is connected to the power pin of the power interface through the eighteenth resistor, and the negative terminal of the second indicator light is connected to the NCHRG pin of the charging chip.

[0023] The technical solution provided in this embodiment of the utility model includes a power-compatible video doorbell comprising a circuit board and a rechargeable battery disposed within the doorbell housing, and a solar panel disposed on the housing surface and electrically connected to the circuit board. A bypass power supply circuit is integrated on the circuit board, connecting the solar panel and the rechargeable battery. The bypass power supply circuit switches between adapter power-on and battery power-on based on whether an adapter voltage is input externally. It controls whether to use DC power generated by the solar panel to charge the battery based on an input charging enable signal. The system is powered on using the adapter voltage; when the external power supply is abnormal and cannot provide power, it uses battery power; when the battery power is insufficient, solar power continuously provides DC power to charge the battery, ensuring the normal operation of the video doorbell. It is compatible with two power-on methods and solar power supplementation, and can automatically switch according to the external power supply and battery power, ensuring power-on even when the external power supply is abnormal, thus solving the problem that abnormal power supply methods in existing systems affect the normal operation of the doorbell. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the housing and solar panel of the video doorbell in this embodiment of the present invention.

[0025] Figure 2 This is a schematic diagram of the structure of the solar panel and circuit board of the video doorbell in this embodiment of the present invention.

[0026] Figure 3 This is a structural block diagram of the video doorbell in an embodiment of this utility model.

[0027] Figure 4 This is a circuit diagram of the interface module in an embodiment of this utility model.

[0028] Figure 5 This is a circuit diagram of the external power supply module in an embodiment of this utility model.

[0029] Figure 6 This is a circuit diagram of the battery power supply module in an embodiment of this utility model.

[0030] Figure 7 This is a circuit diagram of the charging module in an embodiment of the present invention. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments of the present utility model obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0032] It is readily understood that relational terms such as "first" and "second" are used merely to distinguish one entity, operation, or direction from another, without requiring or implying any actual relationship or order between these entities, operations, or directions. The directional terms such as "up," "down," "left," "right," "front," "back," "front," "back," "top," and "bottom," mentioned or possibly used in this specification, are defined relative to the constructions shown in the accompanying drawings. They are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be construed as restrictive. In the following description, various parameters and components are described for embodiments of different constructions. These specific parameters and components are merely examples and do not limit the embodiments of this application.

[0033] Please also refer to Figure 1 , Figure 2 and Figure 3 This utility model provides a video doorbell with compatible power supply, including a circuit board 20 and a rechargeable battery 30 disposed within a video doorbell housing 10, and a solar panel 40 disposed on the surface of the housing and electrically connected to the circuit board 20. The circuit board 20 integrates a bypass power supply circuit 210, which connects the solar panel and the rechargeable battery. The bypass power supply circuit 210 switches between adapter power-on and battery power-on depending on whether an adapter voltage is input externally; and controls whether to use the DC power generated by the solar panel to charge the battery based on an input charging enable signal.

[0034] The bypass power supply circuit 210 includes an interface module 211, an external power supply module 212, a battery power supply module 213, and a charging module 214. The interface module 211 connects to the external power supply module 212, the battery power supply module 213, the charging module 214, and the battery 30. The external power supply module 212 connects to the battery power supply module 213, and the charging module 214 connects to the solar panel 40. The interface module 211 outputs the external adapter voltage and the internal battery voltage. The external power supply module 212 controls whether to output the adapter voltage to power on the battery based on a switch operation. The battery power supply module 213 stops powering on the battery when it detects the presence of adapter voltage and outputs the battery voltage to power on the battery when there is no adapter voltage. When the charging module 214 is working, it uses the adapter voltage or the DC power output from the solar panel to charge the battery (if there is an adapter voltage input, it mainly charges with the adapter voltage, but DC power can also be used for charging; if there is no adapter voltage input, it charges with DC power alone). The system uses the adapter voltage for power-on by default. When the external power supply is abnormal and cannot provide power, it uses the battery for power-on. When the battery power is low, solar power continuously provides DC power to charge the battery, ensuring the normal operation of the video doorbell. It is compatible with two power-on methods and solar power supplementation, and can automatically switch according to the external power supply and battery power to ensure that it can still power on when the external power supply is abnormal, thus solving the problem that abnormal power supply methods would affect the normal operation of the doorbell.

[0035] The solar panel 30 can be a photovoltaic panel made of monocrystalline silicon or polycrystalline silicon. It uses the photoelectric effect to convert solar energy into electrical energy, and transmits the direct current generated by the solar panel to the circuit board 20 through two contacts on the circuit board 20. The solar panel 30 provides the battery with sustainable charging capability, and can replenish power when the external power supply is abnormal, which greatly improves the battery's endurance. With sufficient battery power, the video doorbell can be ensured to operate normally even during power outages.

[0036] like Figure 4 As shown, the interface module 211 includes a power interface J1 and a battery interface J2. The power pins (VBUS1 and VBUS2) of the power interface J1 are the power supply terminals for the output adapter voltage. Pins 1 and 2 of the battery interface J2 are both connected to the positive terminal of the battery and are the battery power supply terminals. Pin 3 of the battery interface J2 is a temperature detection pin, which connects to the charging module and an existing temperature sensor located near the battery. Pins 4, 5, G1, and G2 of the battery interface J2 are all grounded.

[0037] The power interface J1 is a Type-C interface used to connect to an external power source. Taking an adapter as an example, when the adapter is inserted, the power pin of J1 outputs a 5V adapter voltage + 5V to power the corresponding module. Pins 1 and 2 of the battery interface J2 output the battery voltage VBAT to power the corresponding module. Pin 3 of the battery interface J2 transmits the battery temperature signal (NTC) detected by the temperature sensor to the charging module.

[0038] like Figure 5 As shown, the external power supply module 212 includes a DIP switch U1, a first switching transistor Q1, a second switching transistor Q2, a first capacitor C1, and a first resistor R1. Pin 1 of the DIP switch U1 is connected to the gate of the first switching transistor Q1 and the battery power supply module 213. Pin 2 of the DIP switch U1 is grounded, and pin 3 of the DIP switch U1 is connected to the positive terminal of the battery. The source of the first switching transistor Q1 is grounded. The drain of the first switching transistor Q1 is connected to one end of the first resistor R1, one end of the first capacitor C1, and the gate (G) of the second switching transistor Q2. The drain (D1 to D5) of the second switching transistor Q2 is connected to the system power supply terminal (providing the system voltage SYS_PW) and the battery power supply module 213. The source (S and S1) of the second switching transistor Q2 is connected to the other end of the first resistor R1, the other end of the first capacitor C1, and the power supply pin of the power interface J1.

[0039] In this design, the first switching transistor Q1 is preferably an NMOS transistor (IA1134K), and the second switching transistor Q2 is preferably a PMOS transistor (SSC8029GN2, low-level conduction). When the DIP switch U1 (SS-22C09-G4) is switched to pin 1 and pin 3 (equivalent to power-on), it outputs a high-level switching signal ON_OFF_EN; when switched to pin 1 and pin 2 (equivalent to power-off), it outputs a low-level switching signal ON_OFF_EN. In a specific implementation, two parallel capacitors (preferably 22uF and 10uF) can be connected to ground on the source (S and S1) and drain (D1 to D5) of the second switching transistor Q2, respectively, to filter the connected voltage.

[0040] When the switching signal ON_OFF_EN is high, Q1 turns on, controlling Q2 to turn on. At this time, the adapter voltage +5V is output from Q2 as the system voltage SYS_PW, and the system is powered on. When the switching signal ON_OFF_EN is low, both Q1 and Q2 are turned off, thus stopping the adapter voltage +5V from supplying power to the system.

[0041] Preferably, the external power supply module 212 further includes a second resistor R2, a third resistor R3, and a fourth resistor R4; one end of the second resistor R2 is connected to one end of the third resistor R3 and the gate of the first switching transistor Q1, the other end of the second resistor R2 is grounded, the other end of the third resistor R3 is connected to pin 1 of the DIP switch U1, one end of the fourth resistor R4 is connected to the drain of the first switching transistor Q1, and the other end of the fourth resistor R4 is connected to one end of the first resistor R1 and the gate of the second switching transistor Q2.

[0042] R2 is used to pull down the gate of Q1 when there is no switching signal ON_OFF_EN input, to prevent Q1 from being mistakenly turned on. R3 is used for current limiting protection of Q1, and R4 is used for current limiting protection of Q2.

[0043] Preferably, the external power supply module 212 further includes a second capacitor C2, a first diode D1, and a fifth resistor R5; one end of the second capacitor C2 is connected to one end of the first diode D1 and pin 1 of the DIP switch U1, the other end of the second capacitor C2 and the other end of the first diode D1 are both grounded, and the fifth resistor R5 is connected between pin 3 of the DIP switch U1 and the positive terminal of the battery.

[0044] C2 is used to filter the output switching signal ON_OFF_EN to make it smoother. D1 is an ESD diode for electrostatic protection. R5 is used for current limiting and voltage regulation.

[0045] like Figure 6 As shown, the battery power supply module 213 includes a third switch Q3, a fourth switch Q4, a second diode D2, a third capacitor C3, a sixth resistor R6, a seventh resistor R7, and an eighth resistor R8. The gate of the third switch Q3 is connected to pin 1 of the DIP switch U1, and the source of the third switch Q3 is grounded. The drain of the third switch Q3 is connected to one end of the sixth resistor R6, one end of the seventh resistor R7, one end of the third capacitor C3, and the gate (G) of the fourth switch Q4. The drain (D1 to D5) of the fourth switch Q4 is connected to the system power supply terminal (providing the system voltage SYS_PW) and the drain of the second switch Q2. The source (S and S1) of the fourth switch Q4 is connected to the other end of the third capacitor C3, the other end of the seventh resistor R7, and the negative terminal of the second diode D2. The positive terminal of the second diode D2 is connected to the positive terminal of the battery.

[0046] The third switch Q3 is preferably an NMOS transistor (IA1134K), and the fourth switch Q4 is preferably a PMOS transistor (SSC8029GN2, which is turned on at low level). In specific implementation, two parallel capacitors (preferably 22uF and 10uF) can be connected to ground on the source (S and S1) and drain (D1 to D5) of the fourth switch Q4, respectively, to filter the connected voltage.

[0047] If the adapter voltage +5V output from the second switch Q2 is the system voltage SYS_PW, the system is powered on. At this time, regardless of whether the switching signal ON_OFF_EN is high or low, Q4 is cut off, the battery does not participate in the system power supply, and can conserve power. The second diode D2 is a Schottky diode, used to prevent the system voltage SYS_PW from directly leaking to the battery through the body diode of Q4, thus preventing reverse current leakage.

[0048] When a sudden power outage or adapter disconnection results in no +5V output from the adapter, the switching signal ON_OFF_EN remains high. This causes Q3 to conduct, controlling Q4 to turn on. The battery voltage VBAT is then output from R7, controlling Q4 to immediately output the system voltage SYS_PW from Q2. This powers the battery and supplies power to the system, maintaining the video doorbell's normal operation. When the switching signal ON_OFF_EN is low, Q3 is off, the battery voltage VBAT is transmitted from R7 to the gate of Q4, and Q4 turns off, stopping the battery's power supply to the system.

[0049] Preferably, the battery power supply module 213 further includes an eighth resistor R8, a ninth resistor R9, and a tenth resistor R10; one end of the eighth resistor R8 is connected to one end of the ninth resistor R9 and the gate of the third switch Q3, the other end of the eighth resistor R8 is grounded, the other end of the ninth resistor R9 is connected to pin 1 of the DIP switch U1, and the tenth resistor R10 is connected between the source of the third switch Q3 and ground.

[0050] R8 is used to pull down the gate of Q3 when there is no switching signal ON_OFF_EN input to prevent Q3 from being mis-turned on. R9 is used for current limiting protection of Q3, and R10 is used to divide the voltage with R6 to protect Q4 when the adapter voltage is +5V input.

[0051] like Figure 7 As shown, the charging module 214 includes a charging chip U2, a positive contact U3, a negative contact U4, a fourth capacitor C4, a first inductor L1, an eleventh resistor R11, and a twelfth resistor R12. The VIN pin of the charging chip U2 is connected to one end of the fourth capacitor C4, one end of the eleventh resistor R11, and the power pin of the power interface J1. The other end of the eleventh resistor R11 is connected to the positive terminal of the solar panel through the positive contact U3, and the negative contact U2 is connected to the negative terminal of the solar panel and ground. The VGC pin of the charging chip U2 is connected to the other end of the fourth capacitor C4. The NCE pin of the charging chip U2 inputs the charging enable signal CHRG_CE. The LX pin of the charging chip U2 is connected to one end of the first inductor L1. The VS pin of the charging chip U2 is connected to the other end of the first inductor L1 and one end of the twelfth resistor R12. The other end of the twelfth resistor R12 is connected to pin 1 of the battery interface J2. The NTC pin of the charging chip U2 is connected to pin 3 of the battery interface J2.

[0052] Since the circuit board 20 and the solar panel 40 are connected by contacts, two through holes 110 are provided on the surface of the housing to expose the positive contact U3 and the negative contact U4. The charging chip U2 is preferably a wide-voltage input, highly integrated 2.5A synchronous buck lithium battery charger chip from the SLM series (such as SLM6305). When powered by the adapter, the system (such as existing processors, CPUs, etc.) periodically detects the battery voltage. When the battery voltage is determined to be below the lower threshold, the system pulls down the charging enable signal CHAR_EN to enable the charging chip U2, and the adapter voltage +5V input at the VIN pin can simultaneously charge the battery. When the battery charge is determined to be above the upper threshold (such as 90% of the total battery charge), the system pulls up the charging enable signal CHAR_EN to turn off the charging chip U2, stopping charging to prevent overcharging and improve battery life. A high level battery temperature signal input at the NTC pin indicates that the battery temperature is above the threshold, at which point U2 stops working; a low level indicates that the battery temperature is normal, and U2's operation is controlled by other signals.

[0053] Meanwhile, since the solar panel 40 is electrically connected to the circuit board through the positive contact U3 and the negative contact U4, and is bridged to the charging chip U2 through the eleventh resistor R11, the solar energy can charge the battery synchronously. This ensures that the battery is charged when there is a sudden power outage or the adapter is unplugged, further increasing the battery's range.

[0054] Preferably, the charging module 214 further includes a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, and a sixteenth resistor R16; one end of the thirteenth resistor R13 is connected to one end of the fourteenth resistor R14 and the NCE pin of the charging chip U2, the other end of the fourteenth resistor R14 receives the charging enable signal CHRG_CE, one end of the fifteenth resistor R15 is connected to one end of the sixteenth resistor R16 and the NTC pin of the charging chip U2, the other end of the sixteenth resistor R16 is connected to pin 3 of the battery interface J2, and the other ends of the thirteenth resistor R13 and the fifteenth resistor R15 are both grounded.

[0055] R13 and R15 are pull-down resistors used to pull down the corresponding pin when there is no corresponding signal input on the connected pin, so as to avoid malfunction; R14 and R16 are current-limiting resistors to protect U2.

[0056] Preferably, the charging module 214 further includes a first indicator light D4, a second indicator light D5, a seventeenth resistor R17, and an eighteenth resistor R18; the positive terminal of the first indicator light D4 is connected to the power pin of the power interface J1 through the seventeenth resistor R17, and the negative terminal of the first indicator light D4 is connected to the NCHRG pin of the charging chip U2; the positive terminal of the second indicator light D5 is connected to the power pin of the power interface J1 through the eighteenth resistor R18, and the negative terminal of the second indicator light D5 is connected to the NCHRG pin of the charging chip U2.

[0057] The first indicator light D4 indicates the charging status; it illuminates red when lit. D4 is lit and red when the CHRG signal is low, indicating charging is in progress. When charging is complete, the CHRG signal returns to a high level, and D4 turns off. The second indicator light D5 indicates whether U2 has entered standby mode; a low STDBY signal indicates that it has entered standby mode.

[0058] Preferably, the charging module 214 further includes a third diode D3, a fifth capacitor C5, and a sixth capacitor C6; one end of the third diode D3 is connected to one end of the fifth capacitor C5 and the VIN pin of the charging chip U2, the other end of the third diode D3 and the other end of the fifth capacitor C5 are both grounded, and the sixth capacitor C6 is connected between the other end of the twelfth resistor R12 and ground.

[0059] Among them, the third diode D3 is used for ESD electrostatic protection, and C5 and C6 are used for signal filtering on the connected pins.

[0060] Please continue reading. Figures 1 to 7 The working principle of the compatible power supply video doorbell is as follows:

[0061] When the adapter is plugged into power interface J1, the DIP switch U1 is switched so that pins 1 and 3 are connected. At this time, the switching signal ON_OFF_EN is high, Q1 conducts, controlling Q2 to conduct. The adapter voltage +5V is then output from Q2 as the system voltage SYS_PW, and the system is powered on. Simultaneously, the adapter voltage +5V controls Q4 to be cut off, and the battery does not participate in the system power supply, storing its charge.

[0062] The system periodically monitors the battery voltage. When the battery voltage is determined to be below the lower threshold, the system outputs a low-level charging enable signal CHAR_EN to control the charging chip U2. The adapter's +5V voltage provides power while simultaneously charging the battery. When the battery level exceeds the upper threshold, the system pulls the charging enable signal CHAR_EN high to shut down the charging chip U2, preventing overcharging and extending battery life.

[0063] In the event of a sudden power outage or if the adapter is unplugged, there will be no +5V adapter voltage output. Since the switching signal ON_OFF_EN remains high, Q3 conducts, controlling Q4 to conduct. The battery voltage VBAT is output from R7, controlling Q4 to conduct. The battery immediately outputs the system voltage SYS_PW from Q4, powering the system and maintaining the normal operation of the video doorbell. The solar panel 40 is bridged to the charging chip U2 via the positive contact U3 and the eleventh resistor R11. The charging chip U2 can charge the battery using solar energy, further increasing the battery's runtime.

[0064] In summary, the video doorbell with compatible power supply provided by this utility model preferably uses a 5V adapter voltage when the adapter is plugged in. When the battery power is low, it switches to the adapter voltage to charge the battery. When the adapter cannot provide the required voltage, it automatically switches to battery power, and the solar DC power simultaneously replenishes the battery, preventing low or insufficient battery power during prolonged operation. It is compatible with adapter power, battery power, and solar power, automatically switching to the most suitable power supply method based on the current power status, protecting the battery and extending its lifespan.

[0065] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A video doorbell with compatible power supply, comprising a circuit board and a rechargeable battery disposed within the video doorbell housing, characterized in that, It also includes a solar panel disposed on the surface of the housing and electrically connected to a circuit board, wherein a bypass power supply circuit is integrated on the circuit board, the bypass power supply circuit connecting the solar panel and the battery; The bypass power supply circuit switches between adapter power-on and battery power-on depending on whether an external adapter voltage is input. The system controls whether to use direct current generated by the solar panel to charge the battery based on the input charging enable signal.

2. The video doorbell with compatible power supply according to claim 1, characterized in that, The bypass power supply circuit includes an interface module, an external power supply module, a battery power supply module, and a charging module; the interface module connects the external power supply module, the battery power supply module, the charging module, and the battery; the external power supply module connects to the battery power supply module, and the charging module connects to the solar panel; The interface module outputs the external adapter voltage and the internal battery voltage. The external power supply module outputs the adapter voltage to power on the battery. The battery power supply module stops powering on the battery when it detects the presence of adapter voltage and outputs the battery voltage to power on the battery when there is no adapter voltage. The charging module operates when the charging enable signal is valid and uses the adapter voltage or the DC power output from the solar panel to charge the battery.

3. The video doorbell with compatible power supply according to claim 2, characterized in that, The interface module includes a power interface and a battery interface. The power pin of the power interface is the power supply terminal for output adapter voltage. Pins 1 and 2 of the battery interface are both connected to the positive terminal of the battery and are the power supply terminals for the battery. Pin 3 of the battery interface is connected to the charging module and inputs the battery temperature signal. Pins 4, 5, G1, and G2 of the battery interface are all grounded.

4. The video doorbell with compatible power supply according to claim 3, characterized in that, The external power supply module includes a DIP switch, a first switching transistor, a second switching transistor, a first capacitor, and a first resistor; Pin 1 of the DIP switch is connected to the gate of the first switching transistor and the battery power supply module; pin 2 of the DIP switch is grounded; pin 3 of the DIP switch is connected to the positive terminal of the battery; and the source of the first switching transistor is grounded. The drain of the first switching transistor is connected to one end of the first resistor, one end of the first capacitor, and the gate of the second switching transistor. The drain of the second switching transistor is connected to the system power supply terminal and the battery power supply module; The source of the second switching transistor is connected to the other end of the first resistor, the other end of the first capacitor, and the power pin of the power interface.

5. The video doorbell with compatible power supply according to claim 4, characterized in that, The external power supply module also includes a second resistor, a third resistor, and a fourth resistor; one end of the second resistor is connected to one end of the third resistor and the gate of the first switching transistor, the other end of the second resistor is grounded, the other end of the third resistor is connected to pin 1 of the DIP switch, one end of the fourth resistor is connected to the drain of the first switching transistor, and the other end of the fourth resistor is connected to one end of the first resistor and the gate of the second switching transistor.

6. The video doorbell with compatible power supply according to claim 4, characterized in that, The external power supply module also includes a second capacitor, a first diode, and a fifth resistor; One end of the second capacitor is connected to one end of the first diode and pin 1 of the DIP switch. The other end of the second capacitor and the other end of the first diode are both grounded. The fifth resistor is connected between pin 3 of the DIP switch and the positive terminal of the battery.

7. The video doorbell with compatible power supply according to claim 4, characterized in that, The battery power supply module includes a third switch, a fourth switch, a second diode, a third capacitor, a sixth resistor, a seventh resistor, and an eighth resistor; The gate of the third switch is connected to pin 1 of the DIP switch, and the source of the third switch is grounded; the drain of the third switch is connected to one end of the sixth resistor, one end of the seventh resistor, one end of the third capacitor, and the gate of the fourth switch. The drain of the fourth switching transistor is connected to the system power supply terminal and the drain of the second switching transistor; the source of the fourth switching transistor is connected to the other end of the third capacitor, the other end of the seventh resistor, and the negative terminal of the second diode; the positive terminal of the second diode is connected to the positive terminal of the battery.

8. The video doorbell with compatible power supply according to claim 4, characterized in that, The charging module includes a charging chip, a positive contact, a negative contact, a fourth capacitor, a first inductor, an eleventh resistor, and a twelfth resistor; The VIN pin of the charging chip is connected to one end of the fourth capacitor, one end of the eleventh resistor, and the power pin of the power interface; the other end of the eleventh resistor is connected to the positive terminal of the solar panel through the positive contact, and the negative contact is connected to the negative terminal of the solar panel and ground; the VGC pin of the charging chip is connected to the other end of the fourth capacitor; the NCE pin of the charging chip inputs the charging enable signal; the LX pin of the charging chip is connected to one end of the first inductor; the VS pin of the charging chip is connected to the other end of the first inductor and one end of the twelfth resistor; the other end of the twelfth resistor is connected to pin 1 of the battery interface; and the NTC pin of the charging chip is connected to pin 3 of the battery interface.

9. The video doorbell with compatible power supply according to claim 8, characterized in that, The charging module also includes a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, and a sixteenth resistor; One end of the thirteenth resistor is connected to one end of the fourteenth resistor and the NCE pin of the charging chip. The other end of the fourteenth resistor is used to input the charging enable signal. One end of the fifteenth resistor is connected to one end of the sixteenth resistor and the NTC pin of the charging chip. The other end of the sixteenth resistor is connected to pin 3 of the battery interface. The other ends of the thirteenth resistor and the fifteenth resistor are both grounded.

10. The video doorbell with compatible power supply according to claim 8, characterized in that, The charging module also includes a first indicator light, a second indicator light, a seventeenth resistor, and an eighteenth resistor; The positive terminal of the first indicator light is connected to the power pin of the power interface through the seventeenth resistor, and the negative terminal of the first indicator light is connected to the NCHRG pin of the charging chip. The positive terminal of the second indicator light is connected to the power pin of the power interface through the eighteenth resistor, and the negative terminal of the second indicator light is connected to the NCHRG pin of the charging chip.

Images