Power switching circuit of outdoor camera and outdoor camera

Abstract

The present application discloses a power switching circuit of an outdoor camera and an outdoor camera, and relates to the technical field of outdoor cameras, wherein the power switching circuit of the outdoor camera includes: at least one battery; a detection circuit, wherein the input end of the detection circuit is connected to the output end of the battery, and the detection circuit is used to detect the power level of the battery and output a corresponding power level signal; a battery gating circuit, wherein the control end of the battery gating circuit is connected to the output end of the detection circuit, and the output end of the battery gating circuit is connected to the control end of the battery, and the battery gating circuit is used to drive the corresponding battery to be turned on or off according to the power level signal; the present application realizes low-power power supply priority control and switching by adopting a full hardware circuit, and truly realizes shutdown to zero power consumption.

Description

Technical Field

[0001] The present invention relates to the technical field of outdoor cameras, and in particular to a power switching circuit of an outdoor camera and an outdoor camera. Background Art

[0002] In order to improve the battery life of outdoor cameras, the camera design adopts a variety of power supply solutions, including lithium batteries, DC interface batteries, and AA batteries. Given that the power supply has multiple configurations, it is necessary to achieve priority control and flexible switching. At present, most designs use microprocessors with software programming to achieve control and switching functions. However, this method has significant power consumption problems, especially when the camera is turned off. Although the microprocessor is in sleep mode, it is not completely turned off, and will continue to generate power consumption, which will adversely affect the battery life. Summary of the invention

[0003] The main purpose of the present invention is to provide a power switching circuit for an outdoor camera and an outdoor camera,

[0004] To achieve the above object, the present invention provides a power switching circuit for an outdoor camera, comprising:

[0005] Power output terminal;

[0006] At least two types of batteries, electrically connected to the power output terminals respectively;

[0007] A detection circuit, the input end of the detection circuit is connected to the output end of the battery, and the detection circuit is used to detect the power of each battery and output a corresponding power signal;

[0008] A battery gating circuit, wherein the control end of the battery gating circuit is connected to the output end of the detection circuit, the output end of the battery gating circuit is connected to the controlled end of the battery, and the battery gating circuit is used to drive at least one corresponding battery to be electrically connected to the power output end according to the power signal.

[0009] In one embodiment, the battery comprises a lithium battery, a storage battery or a dry cell;

[0010] The detection circuit comprises:

[0011] a first detection circuit, wherein an input end of the first detection circuit is connected to an output end of the lithium battery, an output end of the first detection circuit is connected to a first input end of the battery gating circuit, and the first detection circuit is used to detect the power level of the lithium battery and output a corresponding lithium battery power signal;

[0012] A second detection circuit, wherein the input end of the second detection circuit is connected to the output end of the battery, the output end of the second detection circuit is connected to the second input end of the battery selection circuit, and the second detection circuit is used to detect the power level of the battery and output a corresponding battery power signal.

[0013] In one embodiment, the first detection circuit includes:

[0014] a first comparison chip, wherein a first resistor is connected between an inverting terminal of the first comparison chip and an output terminal of the lithium battery, at least one capacitor is connected between an inverting terminal of the first comparison chip and ground, at least one resistor is connected between an inverting terminal of the first comparison chip and ground, a second resistor is connected between a non-inverting terminal of the first comparison chip and an output terminal of the first comparison chip, and the output terminal of the first comparison chip is connected to a first input terminal of the battery gating circuit;

[0015] The second detection circuit comprises:

[0016] a second comparison chip, wherein at least one resistor is connected in parallel between the inverting terminal of the second comparison chip and the output terminal of the battery, at least one capacitor is connected between the inverting terminal of the second comparison chip and ground, at least one resistor is connected between the inverting terminal of the second comparison chip and ground, a third resistor is connected between the non-inverting terminal of the second comparison chip and the output terminal of the second comparison chip, and the output terminal of the second comparison chip is connected to the second input terminal of the battery gating circuit;

[0017] A fourth resistor, wherein a first end of the fourth resistor is connected to the non-inverting end of the second comparison chip.

[0018] In one embodiment, the battery gating circuit comprises:

[0019] A driving circuit, wherein an input end of the driving circuit is connected to an output end of the detection circuit, and the driving circuit is used to output a corresponding driving signal according to the electrical quantity signal;

[0020] A switch circuit, wherein the control end of the switch circuit is connected to the output end of the drive circuit, the controlled end of the switch circuit is connected to the battery, and the switch circuit is used to control the corresponding battery to be turned on or off according to the drive signal.

[0021] In one embodiment, the driving circuit comprises:

[0022] A first switch element, wherein a control end of the first switch element is connected to an output end of the first comparison chip, and a second conduction end of the first switch element is grounded;

[0023] a second switch element, wherein a control end of the second switch element is connected to a first conduction end of the first switch element, the first conduction end of the second switch element is connected to a first control end of the switch circuit, and a second conduction end of the second switch element is grounded;

[0024] A third switch element, wherein a control end of the third switch element is connected to the output end of the first comparison chip, and a second conduction end of the third switch element is grounded;

[0025] a fourth switch element, wherein a control end of the fourth switch element is connected to an output end of the second comparison chip, and a second conduction end of the fourth switch element is grounded;

[0026] a fifth switch element, wherein the control end of the fifth switch element is connected to the first conduction end of the fourth switch element, the first conduction end of the fifth switch element is connected to the second control end of the switch circuit, and the second conduction end of the fifth switch element is connected to the first conduction end of the third switch element;

[0027] A sixth switch element, wherein the control end of the sixth switch element is connected to the output end of the second comparison chip, the first conduction end of the sixth switch element is connected to the third control end of the switch circuit, and the second conduction end of the sixth switch element is connected to the first conduction end of the third switch element.

[0028] In one embodiment, the switch circuit comprises:

[0029] a seventh switch element, wherein a first conduction end of the seventh switch element is connected to the output end of the lithium battery, a control end of the seventh switch element is connected to the first conduction end of the second switch element, and a fifth resistor is connected between the control end and the second conduction end of the seventh switch element;

[0030] an eighth switch element, wherein a first conduction end of the eighth switch element is connected to a second conduction end of the seventh switch element, and a control end of the eighth switch element is connected to a first conduction end of the second switch element;

[0031] a ninth switch element, wherein a first conduction end of the ninth switch element is connected to the output end of the battery, a control end of the ninth switch element is connected to the first conduction end of the fourth switch element, and a sixth resistor is connected between the control end and the second conduction end of the ninth switch element;

[0032] a tenth switch element, wherein a first conduction end of the tenth switch element is connected to the second conduction end of the ninth switch element, and a control end of the tenth switch element is connected to the first conduction end of the fourth switch element;

[0033] an eleventh switch element, wherein a first conduction end of the eleventh switch element is connected to the output end of the dry cell, a control end of the eleventh switch element is connected to the first conduction end of the sixth switch element, and a seventh resistor is connected between the control end and the second conduction end of the eleventh switch element;

[0034] A twelfth switch element, wherein the first conduction end of the twelfth switch element is connected to the second conduction end of the eleventh switch element, the control end of the twelfth switch element is connected to the first conduction end of the sixth switch element, at least one capacitor is connected between the second conduction end of the twelfth switch element and the ground, and the second conduction end of the twelfth switch element is connected to the second conduction end of the tenth switch element.

[0035] In one embodiment, it further includes:

[0036] A power-on circuit, the input end of which is connected to the battery, and the power-on circuit is used to supply power to the detection circuit and the battery gating circuit;

[0037] The power-on circuit comprises:

[0038] A power-on control circuit, the power-on control circuit is used to reduce the voltage of the battery input and output the reduced voltage power to the detection circuit and the battery gating circuit;

[0039] A power-on power circuit, wherein an input end of the power-on power circuit is connected to the battery, and an output end of the power-on power circuit is connected to an input end of the power-on control circuit.

[0040] In one embodiment, the power-on control circuit includes:

[0041] A toggle switch, wherein a third end of the toggle switch is grounded, and an eighth resistor is connected between the first end of the toggle switch and the output end of the startup power supply circuit;

[0042] A thirteenth switch element, wherein the control end of the thirteenth switch element is connected to the second end of the toggle switch, and the second conduction end of the thirteenth switch element is connected to the output end of the startup power supply circuit;

[0043] A step-down chip, wherein the power input terminal of the step-down chip is connected to the first conduction terminal of the thirteenth switch element, at least one capacitor is connected between the power input terminal of the step-down chip and the ground, at least one capacitor is connected between the output terminal of the step-down chip and the ground, and the output terminal of the step-down chip outputs a voltage to power the detection circuit and the battery selection circuit.

[0044] In one embodiment, the power-on power circuit includes:

[0045] a first diode, wherein an anode of the first diode is connected to a first output terminal of the battery;

[0046] a second diode, wherein the anode of the second diode is connected to the second output terminal of the battery;

[0047] a third diode, wherein an anode of the third diode is connected to a third output terminal of the battery;

[0048] The cathode of the first diode, the cathode of the second diode and the cathode of the third diode are connected together, and output a voltage to the input end of the power-on control circuit.

[0049] In addition, to achieve the above-mentioned purpose, the present invention also proposes an outdoor camera, which includes the power switching circuit of the outdoor camera as described above.

[0050] The technical solution of the present invention is connected to a battery through a detection circuit to detect the power level of the battery and output a corresponding power level signal. The battery selection circuit is then connected to the detection circuit and the battery respectively to drive the corresponding battery to be turned on or off according to the power level signal. Low-power power supply priority control and switching are achieved by adopting a full hardware circuit, and shutdown to zero power consumption is truly achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0052] Figure 1 A schematic structural diagram of an embodiment of a power switching circuit for an outdoor camera provided by the present invention;

[0053] Figure 2 A schematic structural diagram of another embodiment of a power switching circuit for an outdoor camera provided by the present invention;

[0054] Figure 3 A schematic structural diagram of another embodiment of a power switching circuit for an outdoor camera provided by the present invention;

[0055] Figure 4 A schematic structural diagram of another embodiment of a power switching circuit for an outdoor camera provided by the present invention;

[0056] Figure 5 for Figure 4 A further detailed structural diagram;

[0057] Figure 6 A schematic diagram of a power switching circuit for an outdoor camera provided by the present invention;

[0058] Figure 7 for Figure 5 Schematic diagram of the power switching circuit for an outdoor camera.

[0059] Description of Figure Numbers:

[0060]

[0061] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0062] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0063] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0064] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0065] The present invention proposes a power switching circuit for an outdoor camera. The power switching circuit for the outdoor camera of the present application is used in an outdoor environment without power grid power supply. It can realize power supply priority control for multiple different types of batteries, thereby ensuring that the outdoor camera continues to operate in a low power consumption mode when there is no power grid power supply outdoors, and can effectively improve battery life.

[0066] See also Figure 1 In one embodiment of the present invention, the power switching circuit of the outdoor camera includes a power output terminal, at least two types of batteries 100, a detection circuit 200 and a battery gating circuit 300, wherein:

[0067] At least two types of batteries 100 are electrically connected to the output end of the power supply, respectively. The input end of the detection circuit 200 is connected to the output end of the battery 100. The detection circuit 200 is used to detect the power level of each battery 100 and output a corresponding power level signal. The control end of the battery selection circuit 300 is connected to the output end of the detection circuit 200. The output end of the battery selection circuit 300 is connected to the control end of the battery 100. The battery selection circuit 300 is used to drive at least one corresponding battery to be electrically connected to the output end of the power supply according to the power level signal.

[0068] In this embodiment, the battery 100 may include one or more combinations of a storage battery 120, a lithium battery 110 or a dry cell, and the detection circuit 200 may include a voltage detection circuit 200 or a current detection circuit 200, etc., for real-time detection of the power status of the battery 100. The battery gating circuit 300 controls the on and off of the battery 100 by controlling the on and off of the switch element according to the power signal output by the detection circuit 200. This power switching circuit can realize low-power power supply priority control and switching, effectively extending the use time of the outdoor camera, while ensuring that it can automatically switch to other batteries 100 for power supply when the power is low, avoiding data loss or equipment damage caused by sudden power failure. The power output end can be the output interface of each battery. The battery 100 can be provided with a switching element, such as a MOS tube, a triode, etc., to realize the switch conduction control of the battery. The power output end is connected to one conduction end of the switch element provided on the battery 100, and the other conduction end of the switch element is connected to the battery. A battery is provided with a corresponding switch element to realize the control of the output of different batteries. At the same time, the power output end is connected to the power input port of the outdoor camera to provide a stable power supply for the outdoor camera.

[0069] In this embodiment, taking the voltage detection circuit 200 as an example, when it is detected that the voltage of a battery 100 is lower than a preset threshold, the detection circuit 200 will output a low-level signal to the battery gating circuit 300. After receiving this signal, the battery gating circuit 300 will control the corresponding switch element to be disconnected, thereby cutting off the power supply of the battery 100. At the same time, the battery gating circuit 300 will check the power status of other batteries 100. If there is a battery 100 with sufficient power, the corresponding switch element will be controlled to be turned on and switched to the power supply state. In this way, automatic power switching and power supply priority control can be achieved to ensure that the outdoor camera can work stably and reliably in complex environments.

[0070] In this embodiment, by setting a variety of power supply priority modes, the user can select different power supply sequences and switching strategies according to actual needs to meet different usage scenarios and needs. For example, when shooting outdoors for a long time, you can choose to give priority to using the battery 120 for power supply to ensure that the shooting time is maximized; when fast charging or replacement of the battery 100 is required, you can choose to give priority to using the lithium battery 110 for power supply, taking advantage of its high energy density and fast charging characteristics. In addition, the efficiency and stability of power switching can be further optimized by setting parameters such as power threshold and delay time.

[0071] In this embodiment, the detection circuit 200 is connected to the battery 100 to detect the power level of the battery 100 and output a corresponding power level signal. The battery gating circuit 300 is connected to the detection circuit 200 and the battery 100 respectively to drive the corresponding battery 100 to turn on or off according to the power level signal. The low-power power supply priority control and switching are realized by adopting a full hardware circuit, and the shutdown to zero power consumption is truly realized.

[0072] Combined with reference Figure 2 As shown, further, another embodiment of the present invention provides a power switching circuit for an outdoor camera, based on the above Figure 1 In the embodiment shown, the battery 100 includes a lithium battery 110, a storage battery 120 or a dry cell; the detection circuit 200 includes a first detection circuit 210 and a second detection circuit 220, wherein:

[0073] The input end of the first detection circuit 210 is connected to the output end of the lithium battery 110, and the output end of the first detection circuit 210 is connected to the first input end of the battery selection circuit 300. The first detection circuit 210 is used to detect the power of the lithium battery 110 and output the corresponding power signal of the lithium battery 110; the input end of the second detection circuit 220 is connected to the output end of the storage battery 120, and the output end of the second detection circuit 220 is connected to the second input end of the battery selection circuit 300. The second detection circuit 220 is used to detect the power of the storage battery 120 and output the corresponding power signal of the storage battery 120.

[0074] In this embodiment, the first detection circuit 210 is specifically used to detect the power of the lithium battery 110, while the second detection circuit 220 is specifically used to detect the power of the storage battery 120. In this way, accurate power detection can be performed on different types of batteries 100, and corresponding power signals can be output. By setting the first detection circuit 210 and the second detection circuit 220 separately, it can be ensured that the power detection of each type of battery 100 is more accurate and reliable, avoiding detection errors caused by differences in battery 100 types. At the same time, this design also makes the power switching circuit more flexible and expandable, and the detection circuit 200 for a specific type of battery 100 can be added or deleted as needed to adapt to different usage scenarios and needs.

[0075] Specifically, the first detection circuit 210 and the second detection circuit 220 may include a voltage detection circuit 200 or a current detection circuit 200, etc. For the lithium battery 110, since its voltage range is usually relatively stable, its power can be detected by the voltage detection circuit 200. For the storage battery 120, since its voltage range may fluctuate with the change of power, it may be necessary to combine the current detection circuit 200 to more accurately determine its power status. By designing detection circuits 200 for different types of batteries 100 respectively, it can be ensured that accurate power information can be obtained in various usage scenarios, providing reliable data support for subsequent power switching and power supply priority control.

[0076] In addition, the battery gating circuit 300 can control the on or off of the lithium battery 110 and the storage battery 120 according to the received power signal of the lithium battery 110 and the power signal of the storage battery 120, combined with the preset power supply priority and switching strategy. For example, when the lithium battery 110 has sufficient power, the lithium battery 110 can be used for power supply first; when the lithium battery 110 has insufficient power, it automatically switches to the storage battery 120 for power supply. In this way, the advantages of various batteries 100 can be fully utilized to achieve efficient and stable power management.

[0077] It should be noted that in practical applications, detection circuits 200 for other types of batteries 100, such as dry batteries, etc., can be added according to specific needs. At the same time, the power supply priority and switching strategy can be adjusted according to actual needs to meet the use requirements in different scenarios.

[0078] This embodiment can realize accurate detection of the power levels of different types of batteries 100 by respectively setting up detection circuits 200 for lithium batteries 110 and storage batteries 120, which not only improves the accuracy and reliability of power switching, but also makes power management more flexible and efficient, which helps to extend the use time of outdoor cameras and improve stability.

[0079] Combined with reference Figure 6 As shown, further, another embodiment of the present invention provides a power switching circuit for an outdoor camera, based on the above Figure 2 In the embodiment shown, the first detection circuit 210 includes a first comparison chip U1, wherein:

[0080] A first resistor R7 is connected between the inverting end of the first comparison chip U1 and the output end of the lithium battery 110, at least one capacitor is connected between the inverting end of the first comparison chip U1 and the ground, at least one resistor is connected between the inverting end of the first comparison chip U1 and the ground, a second resistor R8 is connected between the inverting end of the first comparison chip U1 and the output end of the first comparison chip U1, and the output end of the first comparison chip U1 is connected to the first input end of the battery selection circuit 300.

[0081] In this embodiment, the first comparison chip U1 can be a high-precision comparator, which is used to compare the voltage of the lithium battery 110 with a preset threshold value, thereby outputting a corresponding power signal. The ninth resistor R6 and the first resistor R7 form a voltage divider detection of the lithium battery power, the capacitor C1 is used for filtering, and the tenth resistor R9 is used for current limiting to protect the first comparison chip U1 from damage caused by excessive current. The second resistor R8 is used for feedback to prevent circuit oscillation and ensure the stability of the output signal state.

[0082] In this embodiment, by reasonably setting the parameters of these resistors, capacitors and comparison chips, it is possible to accurately detect the power level of the lithium battery 110 and output a stable power level signal. When the voltage of the lithium battery 110 is lower than a preset threshold, the first comparison chip U1 will output a low-level signal to the battery gating circuit 300 to trigger a power switching operation. On the contrary, when the power level of the lithium battery 110 is sufficient, the first comparison chip U1 will output a high-level signal to maintain the normal power supply state of the lithium battery 110.

[0083] The detection circuit 200 based on the comparison chip has the advantages of simple structure, low cost, high reliability, etc., and is suitable for outdoor cameras and other electronic devices that need to work stably for a long time. At the same time, due to the full hardware circuit design, low-power power supply priority control and switching can be achieved, ensuring that outdoor cameras can work stably and reliably in various complex environments.

[0084] It should be noted that in practical applications, the parameters of the resistor, capacitor and comparison chip can be adjusted according to specific needs to adapt to different types of lithium batteries 110 and different usage scenarios. In addition, other types of detection circuits 200, such as current detection circuits 200, can be combined to further improve the accuracy and reliability of power switching.

[0085] This embodiment uses a comparison chip to detect the power level of the lithium battery 110, and combines it with other circuit elements to achieve stable power signal output. This design not only improves the accuracy and reliability of power switching, but also reduces the complexity and cost of the overall circuit, which is conducive to the long-term stable operation of the outdoor camera.

[0086] In this embodiment, the second detection circuit 220 includes a second comparison chip U2 and a fourth resistor R11, wherein:

[0087] At least one resistor is connected in parallel between the inverting end of the second comparison chip U2 and the output end of the battery 120, at least one capacitor is connected between the inverting end of the second comparison chip U2 and the ground, at least one resistor is connected between the inverting end of the second comparison chip U2 and the ground, a third resistor R18 is connected between the non-inverting end of the second comparison chip U2 and the output end of the second comparison chip U2, the output end of the second comparison chip U2 is connected to the second input end of the battery selection circuit 300; the first end of the fourth resistor R11 is connected to the non-inverting end of the second comparison chip U2.

[0088] In this embodiment, the design of the second detection circuit 220 is similar to that of the first detection circuit 210, and a comparison chip is also used to detect the power level. The difference is that the second detection circuit 220 mainly detects the power level of the battery 120, so it is necessary to consider that the voltage range of the battery 120 may fluctuate with the change of power level. Therefore, in the second detection circuit 220, it may be necessary to connect multiple resistors in parallel at the inverting end of the comparison chip to achieve accurate detection of different voltage ranges.

[0089] In addition, in order to further improve the detection accuracy and stability, capacitors and resistors are also used in the second detection circuit 220 for filtering and current limiting. These components can effectively eliminate noise and interference in the voltage signal, ensuring that the comparison chip can output an accurate power signal. In a specific implementation, when the voltage of the battery 120 is lower than a preset threshold, the second comparison chip U2 will output a low-level signal to the battery gating circuit 300 to trigger a power switching operation. On the contrary, when the battery 120 is fully charged, the second comparison chip U2 outputs a high-level signal to maintain the normal power supply state of the battery 120.

[0090] Through this design, the second detection circuit 220 can accurately detect the power level of the battery 120, and cooperate with the first detection circuit 210 to provide a reliable power signal for the power switching circuit. This helps to ensure that the outdoor camera can obtain a stable power supply in various usage scenarios, thereby extending the usage time and improving stability.

[0091] It should be noted that in actual applications, the parameters of the resistor, capacitor and comparison chip need to be adjusted according to specific needs to adapt to different types of batteries 120 and different usage scenarios. In addition, other types of detection circuits 200 or sensors, such as temperature sensors, can be combined to further optimize power management and switching strategies to improve the overall performance and reliability of outdoor cameras.

[0092] Combined with reference Figure 3 As shown, further, another embodiment of the present invention provides a power switching circuit for an outdoor camera, based on the above Figure 6 In the embodiment shown, the battery gating circuit 300 includes a driving circuit 310 and a switch circuit 320, wherein:

[0093] The input end of the driving circuit 310 is connected to the output end of the detection circuit 200, and the driving circuit 310 is used to output a corresponding driving signal according to the power signal; the control end of the switching circuit 320 is connected to the output end of the driving circuit 310, and the controlled end of the switching circuit 320 is connected to the battery 100, and the switching circuit 320 is used to control the corresponding battery 100 to be turned on or off according to the driving signal.

[0094] In this embodiment, the driving circuit 310 can be a circuit composed of a logic gate circuit or a switch control element or a microcontroller, etc., which is used to receive the power signal from the detection circuit 200 and output the corresponding driving signal according to the preset logic rules. The driving signal can be a high level or a low level signal, which is used to control the on or off state of the switch circuit 320. The switch circuit 320 is a circuit composed of switch elements (such as relays, MOSFETs, etc.), and the switch circuit 320 is used to control the on or off state of the battery 100 according to the driving signal. In one implementation, when the driving signal is at a high level, the switch circuit 320 connects the corresponding battery 100 to the circuit to power the outdoor camera; when the driving signal is at a low level, the switch circuit 320 disconnects the corresponding battery 100 and stops its power supply, and vice versa.

[0095] Through this design, the power switching circuit can realize automatic switching of different power sources, ensuring that the outdoor camera can obtain a stable power supply in various usage scenarios. At the same time, due to the use of a full hardware circuit design, the power switching circuit has the advantages of fast response speed and high reliability, which can meet the stringent requirements of outdoor cameras for power management.

[0096] In practical applications, the specific implementation of the driving circuit 310 and the switch circuit 320 can be selected and adjusted according to actual needs. For example, the switch circuit 320 can select a switch element suitable for high current and high voltage to ensure the reliability and safety of power switching.

[0097] The power switching circuit of the outdoor camera provided in this embodiment detects the power levels of the lithium battery 110 and the storage battery 120 by using the detection circuit 200, and outputs corresponding power signals according to the detection results; then, the driving circuit 310 and the switching circuit 320 are used to control the on or off of different power sources according to the power signals, thereby realizing automatic switching of different power sources, meeting the stringent requirements of outdoor cameras for power management, and improving the stability and service life of outdoor cameras.

[0098] Combined with reference Figure 6 As shown, further, another embodiment of the present invention provides a power switching circuit for an outdoor camera, based on the above Figure 3 In the embodiment shown, the driving circuit 310 includes a first switch element Q10, a second switch element Q7, a third switch element Q11, a fourth switch element Q12, a fifth switch element Q8 and a sixth switch element Q9, wherein:

[0099] The control end of the first switch element Q10 is connected to the output end of the first comparison chip U1, and the second conduction end of the first switch element Q10 is grounded; the control end of the second switch element Q7 is connected to the first conduction end of the first switch element Q10, the first conduction end of the second switch element Q7 is connected to the first control end of the switch circuit 320, and the second conduction end of the second switch element Q7 is grounded; the control end of the third switch element Q11 is connected to the output end of the first comparison chip U1, and the second conduction end of the third switch element Q11 is grounded; the control end of the fourth switch element Q12 is connected to the output end of the second comparison chip U2, and the control end of the fourth switch element Q13 is connected to the output end of the second comparison chip U3. The second conduction end of the fourth switch element Q12 is grounded; the control end of the fifth switch element Q8 is connected to the first conduction end of the fourth switch element Q12, the first conduction end of the fifth switch element Q8 is connected to the second control end of the switch circuit 320, and the second conduction end of the fifth switch element Q8 is connected to the first conduction end of the third switch element Q11; the control end of the sixth switch element Q9 is connected to the output end of the second comparison chip U2, the first conduction end of the sixth switch element Q9 is connected to the third control end of the switch circuit 320, and the second conduction end of the sixth switch element Q9 is connected to the first conduction end of the third switch element Q11.

[0100] In this embodiment, the first switch element Q10, the second switch element Q7, the third switch element Q11, the fourth switch element Q12, the fifth switch element Q8 and the sixth switch element Q9 can be a switch element with strong controllability, such as a MOS tube, a transistor or a relay, wherein the control end of the first switch element Q10 receives the power signal from the first comparison chip U1. When the first comparison chip U1 detects that the power of the lithium battery 110 is lower than the preset threshold, it outputs a high-level signal to turn on the first switch element Q10. At this time, the control signal of the second switch element Q7 is low-level, thereby making the second switch element Q7 non-conductive, so that the first control end of the switch circuit 320 loses the control signal, thereby disconnecting the power supply of the lithium battery 110. On the contrary, when the power of the lithium battery 110 is sufficient, the first comparison chip U1 outputs a low-level signal to make the first switch element Q10 non-conductive, thereby making the control end of the second switch element Q7 receive a high-level signal, thereby controlling the first control end of the switch circuit 320 to turn on, so that the lithium battery 110 supplies power to the outdoor camera.

[0101] In this embodiment, the control end of the third switch element Q11 also receives the power signal from the first comparison chip U1. The difference is that when the first comparison chip U1 outputs a low-level signal, the third switch element Q11 is not turned on, and the fifth switch element Q8 and the sixth switch element Q9 cannot be turned on. When the first comparison chip U1 outputs a high-level signal, the third switch element Q11 is turned on, so that the source of the fifth switch element Q8 and the source of the sixth switch element Q9 are in a low-level state, and the gate of the fifth switch element Q8 and the gate of the sixth switch element Q9 control the conduction state according to their corresponding level control signals.

[0102] In this embodiment, the control end of the fourth switch element Q12 receives the power signal from the second comparison chip U2. When the second comparison chip U2 detects that the power of the storage battery 120 is lower than the preset threshold, it outputs a high-level signal to turn on the fourth switch element Q12, and then disconnects the control signal of the fifth switch element Q8, so that the second control end of the switch circuit 320 loses the control signal, thereby disconnecting the power supply of the storage battery 120. At the same time, since the third switch element Q11 is in a closed state at this time, the control end of the sixth switch element Q9 will also receive a high-level signal, thereby turning on the third control end of the switch circuit 320, so that the dry cell can power the outdoor camera. On the contrary, when the storage battery 120 is fully charged, the second comparison chip U2 outputs a high-level signal to turn off the fourth switch element Q12, and then the control end of the fifth switch element Q8 and the control end of the sixth switch element Q9 receive a high-level signal, thereby controlling the second control end of the switch circuit 320 to turn on, and the third control end of the switch circuit 320 to turn off, so that the storage battery 120 can power the outdoor camera.

[0103] Through the above design, the driving circuit 310 can accurately detect the power of the lithium battery 110 and the storage battery 120, and output the corresponding driving signal according to the detection result, so as to control the switch circuit 320 to turn on or off different power sources. This design has the advantages of fast response speed and high reliability, and can meet the stringent requirements of outdoor cameras for power management.

[0104] It should be noted that in practical applications, the specific type and parameters of the switching element need to be selected and adjusted according to actual needs and circuit characteristics to ensure the stability and reliability of the power switching circuit. At the same time, the power consumption and heat dissipation of the circuit also need to be considered to avoid performance degradation or damage caused by excessive power consumption or poor heat dissipation.

[0105] This embodiment detects the power of the lithium battery 110 and the storage battery 120 by using the detection circuit 200, and outputs the corresponding power signal according to the detection result; then the driving circuit 310 and the switching circuit 320 are used to control the conduction or shutdown of different power supplies according to the power signal, thereby realizing automatic switching of different power supplies. This design method has the advantages of fast response speed and high reliability, which can meet the stringent requirements of outdoor cameras for power management and improve the stability and service life of outdoor cameras. At the same time, through reasonable circuit design and component selection, the performance and reliability of the power switching circuit can be further optimized to ensure that the outdoor camera can obtain a stable and reliable power supply in various usage scenarios.

[0106] Combined with reference Figure 6 As shown, further, another embodiment of the present invention provides a power switching circuit for an outdoor camera, based on the above Figure 6 As shown in the embodiment of the driving circuit 310, the switch circuit 320 includes a seventh switch element Q1, an eighth switch element Q2, a ninth switch element Q3, a tenth switch element Q4, an eleventh switch element Q5 and a twelfth switch element Q6, wherein:

[0107] The first conduction end of the seventh switch element Q1 is connected to the output end of the lithium battery 110, the control end of the seventh switch element Q1 is connected to the first conduction end of the second switch element Q7, and a fifth resistor R1 is connected between the control end and the second conduction end of the seventh switch element Q1; the first conduction end of the eighth switch element Q2 is connected to the second conduction end of the seventh switch element Q1, and the control end of the eighth switch element Q2 is connected to the first conduction end of the second switch element Q7; the first conduction end of the ninth switch element Q3 is connected to the output end of the battery 120, the control end of the ninth switch element Q3 is connected to the first conduction end of the fourth switch element Q12, and a sixth resistor R2 is connected between the control end and the second conduction end of the ninth switch element Q3; the first conduction end of the tenth switch element Q4 is connected to the ninth switch The first conduction end of the twelfth switch element Q6 is connected to the second conduction end of the eleventh switch element Q5, the control end of the twelfth switch element Q6 is connected to the first conduction end of the sixth switch element Q9, and a seventh resistor R3 is connected between the control end and the second conduction end of the eleventh switch element Q5; the first conduction end of the twelfth switch element Q6 is connected to the second conduction end of the eleventh switch element Q5, the control end of the twelfth switch element Q6 is connected to the first conduction end of the sixth switch element Q9, at least one capacitor is connected between the second conduction end of the twelfth switch element Q6 and the ground, and the second conduction end of the twelfth switch element Q6 is connected to the second conduction end of the tenth switch element Q4.

[0108] In this embodiment, the seventh switch element Q1, the eighth switch element Q2, the ninth switch element Q3, the tenth switch element Q4, the eleventh switch element Q5 and the twelfth switch element Q6 can be controllable switch elements such as field effect tubes, transistors or relays. These switch elements turn on or off different power supplies according to the control signal output by the drive circuit 310.

[0109] Among them, when the lithium battery 110 is fully charged, the first comparison chip U1 outputs a low-level signal, so that the first switch element Q10 is not turned on, and then the second switch element Q7 is turned on. At this time, the control end of the seventh switch element Q1 and the control end of the eighth switch element Q2 receive a low-level signal, so they are turned on, so that the lithium battery 110 supplies power to the outdoor camera through the seventh switch element Q1 and the eighth switch element Q2. At the same time, since the third switch element Q11 is in a disconnected state at this time, the control end of the sixth switch element Q9 will not receive any signal, so the states of the eleventh switch element Q5 and the twelfth switch element Q6 will not be affected. When the battery 120 is fully charged, the second comparison chip U2 outputs a low-level signal, so that the fourth switch element Q12 and the sixth switch element Q9 are not turned on, and then the fifth switch element Q8 is turned on. At this time, the control end of the ninth switch element Q3 and the control end of the tenth switch element Q4 receive a low-level signal, so they are turned on, so that the battery 120 supplies power to the outdoor camera through the ninth switch element Q3 and the tenth switch element Q4. At the same time, since the third switch element Q11 is in the disconnected state at this time, the control end of the sixth switch element Q9 will not receive any signal, so the states of the eleventh switch element Q5 and the twelfth switch element Q6 will not be affected. When it is necessary to switch to dry cell battery power supply, it can be achieved by controlling the state of the sixth switch element Q9. When the sixth switch element Q9 is turned on, it outputs a low-level signal, so that the control end of the eleventh switch element Q5 and the control end of the twelfth switch element Q6 receive a low-level signal, thereby turning on, so that the dry cell powers the outdoor camera through the eleventh switch element Q5 and the twelfth switch element Q6. At this time, since the seventh switch element Q1, the eighth switch element Q2, the ninth switch element Q3 and the tenth switch element Q4 are all in the disconnected state, the lithium battery 110 and the storage battery 120 will not power the outdoor camera.

[0110] In this embodiment, the power switching circuit can realize automatic switching of the three power sources of lithium battery 110, storage battery 120 and dry battery, ensuring that the outdoor camera can obtain stable and reliable power supply under various conditions. At the same time, by adopting a combination of multiple switch elements and control circuits, precise control of power switching is achieved, thereby improving the utilization efficiency of power and the stability of the system.

[0111] In addition, by connecting at least one capacitor between the second conduction terminal of the twelfth switch element Q6 and the ground, the noise and interference in the power supply can be effectively filtered out, and the stability of the power supply can be improved. At the same time, the capacitor can also play the role of energy storage, providing short-term current support at the moment of power switching, ensuring the normal operation of the outdoor camera.

[0112] Combined with reference Figures 4 to 5 As shown, further, another embodiment of the present invention provides a power switching circuit for an outdoor camera, based on the above Figure 1 In the embodiment shown, the power switching circuit further includes a power-on circuit 400, wherein:

[0113] An input end of the power-on circuit 400 is connected to the battery 100 , and the power-on circuit 400 is used to supply power to the detection circuit 200 and the battery gating circuit 300 .

[0114] In this embodiment, the power-on circuit 400 can be an independent circuit module for providing an initial power supply when the outdoor camera is turned on. The power-on circuit 400 is connected to the battery 100 to ensure that sufficient power can be obtained to start the entire power switching circuit and the detection circuit 200 when the camera is turned on. The design of the power-on circuit 400 needs to take into account the requirements of the starting current and the starting time to ensure that the camera can quickly and stably enter the working state. In the design of the power-on circuit 400, low-power circuit design principles can be adopted to reduce energy waste. At the same time, in order to ensure the stability and reliability of the power-on circuit 400, some protection measures, such as over-current protection, over-voltage protection, etc., can also be adopted to prevent circuit damage or accidents.

[0115] When the outdoor camera is turned on, the power-on circuit 400 is first activated and provides the required power to the detection circuit 200 and the battery gating circuit 300. Subsequently, the detection circuit 200 starts to work, detects the power level of the battery 100, and selects an appropriate power source for power supply according to the detection result. The battery gating circuit 300 controls the conduction or shutdown of different power sources according to the output signal of the detection circuit 200, thereby realizing the function of connecting the corresponding battery 100.

[0116] In this embodiment, by introducing the power-on circuit 400, it can be ensured that the outdoor camera can start smoothly and work stably when it is turned on. In practical applications, the power-on circuit 400 can be further optimized and improved according to specific needs to improve its performance and reliability. For example, a more efficient power conversion technology can be used to reduce energy loss; or a more intelligent control strategy can be used to achieve more accurate and rapid control of power switching.

[0117] In this embodiment, the power-on circuit 400 includes a power-on control circuit 410 and a power-on power circuit 420, wherein:

[0118] The power-on control circuit 410 is used to reduce the voltage input to the battery 100 and output the reduced voltage power to the detection circuit 200 and the battery selection circuit 300; the input end of the power-on power circuit 420 is connected to the battery 100, and the output end of the power-on power circuit 420 is connected to the input end of the power-on control circuit 410.

[0119] In this embodiment, the power-on control circuit 410 may include a step-down circuit for reducing the higher voltage input by the battery 100 to a lower voltage suitable for the detection circuit 200 and the battery gating circuit 300 to work. This ensures that these circuit modules can work normally while avoiding the risk of damage caused by excessive voltage. The step-down circuit can adopt different step-down methods such as linear step-down and switch step-down. The output end of the power-on control circuit 410 is connected to the input end of the detection circuit 200 and the battery gating circuit 300 to provide a stable operating voltage.

[0120] The power supply circuit 420 is responsible for converting the power input from the battery 100 into the power required by the power control circuit 410. It can be a simple power conversion circuit or a rectifier circuit to convert the voltage of the battery 100 into the voltage and current required by the power control circuit 410. The design of the power supply circuit 420 needs to consider factors such as power conversion efficiency, stability and reliability to ensure that the power control circuit 410 can work stably and reliably.

[0121] Combined with reference Figure 7 As shown, further, another embodiment of the present invention provides a power switching circuit for an outdoor camera, based on the above Figures 4 to 5 In the embodiment shown, the power-on control circuit 410 includes a toggle switch S1, a thirteenth switch element Q13 and a buck chip U3, wherein:

[0122] The third end of the toggle switch S1 is grounded, and an eighth resistor R15 is connected between the first end of the toggle switch S1 and the output end of the startup power circuit 420; the control end of the thirteenth switch element Q13 is connected to the second end of the toggle switch S1, and the second conduction end of the thirteenth switch element Q13 is connected to the output end of the startup power circuit 420; the power input end of the buck chip U3 is connected to the first conduction end of the thirteenth switch element Q13, at least one capacitor is connected between the power input end of the buck chip U3 and the ground, at least one capacitor is connected between the output end of the buck chip U3 and the ground, and the output end of the buck chip U3 outputs a voltage to power the detection circuit 200 and the battery selection circuit 300.

[0123] In this embodiment, the toggle switch S1 can be a manually operated switch for controlling the power on and off of the power switching circuit. When the toggle switch S1 is in the power on position, its second end is connected to the third end, so that the control end of the thirteenth switch element Q13 receives a low level signal, thereby turning on the thirteenth switch element Q13. At this time, the power output by the power-on power circuit 420 provides power input for the buck chip U3 through the conduction path of the thirteenth switch element Q13. The buck chip U3 steps down the input power supply and outputs a stable low voltage for use by the detection circuit 200 and the battery gating circuit 300. By connecting a capacitor, noise and interference in the power supply can be effectively filtered out, and the stability of the power supply can be improved. At the same time, the capacitor can also play the role of energy storage, providing short-term current support at the moment of power switching to ensure the normal operation of the outdoor camera.

[0124] In practical applications, the thirteenth switch element Q13 can be implemented by a field effect tube, a transistor or other switch element. The buck chip U3 can select a suitable model and parameters according to the specific power input and output requirements. By reasonably configuring the parameters of components such as resistors and capacitors, the performance of the power switching circuit can be optimized and the power conversion efficiency and stability can be improved.

[0125] The power switching circuit in this embodiment realizes precise control and management of the power supply of the outdoor camera by introducing the power-on control circuit 410. When the camera is turned on, the power switching circuit can be conveniently started by operating the toggle switch S1, and a stable power supply can be provided to the detection circuit 200 and the battery gating circuit 300. During the power switching process, the on and off of different power supplies are precisely controlled to ensure the stable operation of the outdoor camera in various situations and the reliability of the power supply.

[0126] In addition, the power switching circuit in this embodiment has the advantages of simple structure, low cost, easy implementation, etc. At the same time, by adopting a combination of multiple switch elements and control circuits, precise control of power switching is achieved, thereby improving the utilization efficiency of power and the stability of the system.

[0127] Combined with reference Figure 7 As shown, further, another embodiment of the present invention provides a power switching circuit for an outdoor camera, based on the above Figures 4 to 5 In the embodiment shown, the power-on power circuit 420 includes a first diode, a second diode and a third diode, wherein:

[0128] The anode of the first diode is connected to the first output terminal of the battery 100; the anode of the second diode is connected to the second output terminal of the battery 100; the anode of the third diode is connected to the third output terminal of the battery 100; the cathode of the first diode, the cathode of the second diode and the cathode of the third diode are connected together, and output voltage to the input terminal of the power-on control circuit 410.

[0129] In this embodiment, the first diode, the second diode and the third diode are connected to the output ends of different batteries 100, for example, the first diode is connected to the storage battery 120, the second diode is connected to the dry cell battery, and the third diode is connected to the lithium battery 110. The first diode, the second diode and the third diode are used to rectify the power of the battery 100. The cathodes of the three diodes are connected together to form a common cathode, and output voltage to the input end of the power-on control circuit 410.

[0130] The power-on control circuit 410 receives the rectified power and performs further voltage reduction processing to output a voltage suitable for the detection circuit 200 and the battery gating circuit 300. Such a design enables the power switching circuit to adapt to the output characteristics of different batteries 100, thereby improving the compatibility and stability of the circuit.

[0131] In addition, by using a diode for rectification, circuit damage caused by reverse connection of the power supply or wrong polarity can be effectively prevented. If the output terminal of the battery 100 has wrong polarity or wrong connection, the diode will prevent the reverse flow of current and protect the circuit from damage.

[0132] The power switching circuit in this embodiment achieves rectification and stable output of the power of the battery 100 by introducing the startup power circuit 420, and provides a reliable power input for the startup control circuit 410. This design not only improves the utilization rate and stability of the power supply, but also enhances the safety and reliability of the circuit.

[0133] The present invention also proposes an outdoor camera, which includes a power switching circuit of the outdoor camera. The specific structure of the power switching circuit of the outdoor camera refers to the above-mentioned embodiment. Since the outdoor camera adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0134] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A power switching circuit for an outdoor camera, characterized in that: include: Power supply output terminal; At least two types of batteries, electrically connected to the power output terminals respectively; A detection circuit, the input end of the detection circuit is connected to the output end of the battery, and the detection circuit is used to detect the power of each battery and output a corresponding power signal; A battery gating circuit, wherein the control end of the battery gating circuit is connected to the output end of the detection circuit, the output end of the battery gating circuit is connected to the controlled end of the battery, and the battery gating circuit is used to drive at least one corresponding battery to be electrically connected to the power output end according to the power signal; A power-on control circuit, the power-on control circuit is used to reduce the voltage of the battery input and output the reduced voltage power to the detection circuit and the battery gating circuit; A power-on power circuit, wherein an input end of the power-on power circuit is connected to the battery, and an output end of the power-on power circuit is connected to an input end of the power-on control circuit; The battery includes a lithium battery, a storage battery or a dry cell; The detection circuit comprises: a first detection circuit, wherein an input end of the first detection circuit is connected to an output end of the lithium battery, an output end of the first detection circuit is connected to a first input end of the battery gating circuit, and the first detection circuit is used to detect the power level of the lithium battery and output a corresponding lithium battery power signal; a second detection circuit, wherein an input end of the second detection circuit is connected to an output end of the battery, an output end of the second detection circuit is connected to a second input end of the battery gating circuit, and the second detection circuit is used to detect the power level of the battery and output a corresponding battery power signal; The first detection circuit comprises: a first comparison chip, wherein a first resistor is connected between an inverting terminal of the first comparison chip and an output terminal of the lithium battery, at least one capacitor is connected between an inverting terminal of the first comparison chip and ground, at least one resistor is connected between an inverting terminal of the first comparison chip and ground, a second resistor is connected between a non-inverting terminal of the first comparison chip and an output terminal of the first comparison chip, and the output terminal of the first comparison chip is connected to a first input terminal of the battery gating circuit; The second detection circuit comprises: a second comparison chip, wherein at least one resistor is connected in parallel between the inverting terminal of the second comparison chip and the output terminal of the battery, at least one capacitor is connected between the inverting terminal of the second comparison chip and ground, at least one resistor is connected between the inverting terminal of the second comparison chip and ground, a third resistor is connected between the non-inverting terminal of the second comparison chip and the output terminal of the second comparison chip, and the output terminal of the second comparison chip is connected to the second input terminal of the battery gating circuit; a fourth resistor, a first end of the fourth resistor being connected to the in-phase end of the second comparison chip; The battery gating circuit comprises: A driving circuit, wherein an input end of the driving circuit is connected to an output end of the detection circuit, and the driving circuit is used to output a corresponding driving signal according to the electrical quantity signal; A switch circuit, wherein a control end of the switch circuit is connected to an output end of the drive circuit, a controlled end of the switch circuit is connected to the battery, and the switch circuit is used to control the corresponding battery to be turned on or off according to the drive signal; The driving circuit comprises: A first switch element, wherein a control end of the first switch element is connected to an output end of the first comparison chip, and a second conduction end of the first switch element is grounded; a second switch element, wherein a control end of the second switch element is connected to a first conduction end of the first switch element, the first conduction end of the second switch element is connected to a first control end of the switch circuit, and a second conduction end of the second switch element is grounded; A third switch element, wherein a control end of the third switch element is connected to the output end of the first comparison chip, and a second conduction end of the third switch element is grounded; a fourth switch element, wherein a control end of the fourth switch element is connected to an output end of the second comparison chip, and a second conduction end of the fourth switch element is grounded; a fifth switch element, wherein the control end of the fifth switch element is connected to the first conduction end of the fourth switch element, the first conduction end of the fifth switch element is connected to the second control end of the switch circuit, and the second conduction end of the fifth switch element is connected to the first conduction end of the third switch element; A sixth switch element, wherein the control end of the sixth switch element is connected to the output end of the second comparison chip, the first conduction end of the sixth switch element is connected to the third control end of the switch circuit, and the second conduction end of the sixth switch element is connected to the first conduction end of the third switch element.

2. The power switching circuit of the outdoor camera as claimed in claim 1, characterized in that: The switch circuit comprises: a seventh switch element, wherein a first conduction end of the seventh switch element is connected to the output end of the lithium battery, a control end of the seventh switch element is connected to the first conduction end of the second switch element, and a fifth resistor is connected between the control end and the second conduction end of the seventh switch element; an eighth switch element, wherein a first conduction end of the eighth switch element is connected to a second conduction end of the seventh switch element, and a control end of the eighth switch element is connected to a first conduction end of the second switch element; a ninth switch element, wherein a first conduction end of the ninth switch element is connected to the output end of the battery, a control end of the ninth switch element is connected to the first conduction end of the fourth switch element, and a sixth resistor is connected between the control end and the second conduction end of the ninth switch element; a tenth switch element, wherein a first conduction end of the tenth switch element is connected to the second conduction end of the ninth switch element, and a control end of the tenth switch element is connected to the first conduction end of the fourth switch element; an eleventh switch element, wherein a first conduction end of the eleventh switch element is connected to the output end of the dry cell, a control end of the eleventh switch element is connected to the first conduction end of the sixth switch element, and a seventh resistor is connected between the control end and the second conduction end of the eleventh switch element; A twelfth switch element, wherein the first conduction end of the twelfth switch element is connected to the second conduction end of the eleventh switch element, the control end of the twelfth switch element is connected to the first conduction end of the sixth switch element, at least one capacitor is connected between the second conduction end of the twelfth switch element and the ground, and the second conduction end of the twelfth switch element is connected to the second conduction end of the tenth switch element.

3. The power switching circuit of the outdoor camera as claimed in claim 1, characterized in that: The power-on control circuit comprises: A toggle switch, wherein a third end of the toggle switch is grounded, and an eighth resistor is connected between the first end of the toggle switch and the output end of the startup power supply circuit; A thirteenth switch element, wherein the control end of the thirteenth switch element is connected to the second end of the toggle switch, and the second conduction end of the thirteenth switch element is connected to the output end of the startup power supply circuit; A step-down chip, wherein the power input terminal of the step-down chip is connected to the first conduction terminal of the thirteenth switch element, at least one capacitor is connected between the power input terminal of the step-down chip and the ground, at least one capacitor is connected between the output terminal of the step-down chip and the ground, and the output terminal of the step-down chip outputs a voltage to power the detection circuit and the battery selection circuit.

4. The power switching circuit of the outdoor camera as claimed in claim 1, characterized in that: The power-on power circuit comprises: a first diode, wherein an anode of the first diode is connected to a first output terminal of the battery; a second diode, wherein the anode of the second diode is connected to the second output terminal of the battery; a third diode, wherein an anode of the third diode is connected to a third output terminal of the battery; The cathode of the first diode, the cathode of the second diode and the cathode of the third diode are connected together, and output a voltage to the input end of the power-on control circuit.

5. An outdoor camera, characterized in that: The outdoor camera comprises the power switching circuit of the outdoor camera as claimed in any one of claims 1 to 4.

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