Discharge circuit, power module, unmanned aircraft, and electronic device

Abstract

The application relates to a discharge circuit, a power supply module, an unmanned aerial vehicle and electronic equipment. The discharge circuit comprises a discharge circuit connected between a power supply circuit and the ground, the discharge circuit has a first state and a second state, the impedance of the discharge circuit in the second state is smaller than that in the first state, and the discharge circuit further comprises a trigger circuit connected with the discharge circuit, the trigger circuit is used for controlling the discharge circuit to be in the second state to discharge the power supply circuit through the discharge circuit when detecting that the power supply state of the power supply circuit changes. The discharge speed of the power supply circuit can be improved by adopting the discharge circuit, so that the power supply sparking problem caused by slow discharge speed is avoided, and the safety and reliability in the power supply state change process are improved.

Description

Technical Field

[0001] This application relates to the field of discharge circuit technology, and in particular to a discharge circuit, a power module, an unmanned aerial vehicle, and electronic equipment. Background Technology

[0002] When the power supply in a circuit is cut off, if there is a large capacitor in the circuit load, the capacitor will store a large amount of charge, forming a residual voltage in the circuit. If the residual voltage formed by the capacitor cannot be discharged in time when the power supply is quickly plugged in and out, arcing will occur. Therefore, it is necessary to discharge the residual voltage by means of discharge.

[0003] However, existing discharge circuits have slow discharge speeds and insufficient discharge efficiency. Utility Model Content

[0004] Therefore, it is necessary to provide a discharge circuit, power module, unmanned aerial vehicle, and electronic device that can improve the discharge speed in response to the above-mentioned technical problems.

[0005] In a first aspect, this utility model provides a discharge circuit, which includes:

[0006] A bleeder circuit is connected between the power supply circuit and ground. The bleeder circuit has a first state and a second state. The impedance of the bleeder circuit in the second state is less than the impedance in the first state.

[0007] The trigger circuit, connected to the discharge circuit, is used to control the discharge circuit to a second state when a change in the power state of the power supply circuit is detected, so as to discharge the power supply circuit through the discharge circuit.

[0008] In one embodiment, the discharge circuit includes a first discharge branch, which includes a discharge switch and a first discharge resistor, the discharge switch including a transistor.

[0009] In one embodiment, the discharge circuit includes a second discharge branch connected in parallel with the first discharge branch. The second discharge branch includes a second discharge resistor, the resistance of which is greater than that of the first discharge resistor.

[0010] In one embodiment, the trigger circuit includes a comparator, a first input of which is connected to a load circuit powered by a power supply circuit, a second input of which is connected to a power supply circuit, and an output of which is connected to a discharge switch.

[0011] In one embodiment, the control terminal of the transistor is connected to the output terminal of the comparator, the first terminal of the transistor is connected to the power supply circuit, and the second terminal of the transistor is connected to the first bleeder resistor.

[0012] In one embodiment, the discharge circuit further includes a first voltage divider resistor and a second voltage divider resistor;

[0013] The second input terminal of the comparator is connected to the positive terminal of the power supply circuit through the first voltage divider resistor, and the second input terminal of the comparator is connected to the negative terminal of the power supply circuit through the second voltage divider resistor.

[0014] In one embodiment, the discharge circuit further includes a voltage divider circuit, which includes a third voltage divider resistor, a fourth voltage divider resistor, a fifth voltage divider resistor, and a sixth voltage divider resistor.

[0015] The first input terminal of the comparator is connected to the first terminal of the third voltage divider resistor, the second terminal of the third voltage divider resistor is connected to the first terminal of the fifth voltage divider resistor, and the second terminal of the fifth voltage divider resistor is connected to the positive terminal.

[0016] The first input terminal of the comparator is connected to the first terminal of the fourth voltage divider resistor, and the second terminal of the fourth voltage divider resistor is grounded.

[0017] The first end of the sixth voltage divider resistor is connected to the second end of the third voltage divider resistor, and the second end of the sixth voltage divider resistor is grounded.

[0018] In one embodiment, the discharge circuit further includes a first pull-up resistor;

[0019] The output of the comparator is connected to the positive terminal through the first pull-up resistor.

[0020] In one embodiment, the discharge circuit further includes a first current-limiting resistor;

[0021] The output of the comparator is connected to the control terminal of the transistor through the first current-limiting resistor.

[0022] In one embodiment, the sum of the resistance values ​​of the fifth and sixth voltage divider resistors is less than the sum of the resistance values ​​of the first and second voltage divider resistors.

[0023] In one embodiment, the triggering circuit includes a contact switch, with a first end of the contact switch connected to a power supply circuit and a second end of the contact switch connected to a discharge circuit.

[0024] In one embodiment, the discharge circuit further includes a second pull-up resistor;

[0025] The second terminal of the contact switch is connected to the positive terminal of the power supply circuit through a second pull-up resistor.

[0026] In one embodiment, the discharge circuit further includes a second current-limiting resistor;

[0027] The second terminal of the contact switch is connected to the control terminal of the transistor through a second current-limiting resistor.

[0028] In one embodiment, the discharge circuit further includes a diode, one end of which is connected to a second pull-up resistor, and the other end of which is connected to the first terminal of a transistor.

[0029] In one embodiment, the trigger circuit includes a sensor that, upon detecting a change in the power state of the power circuit, controls the discharge circuit to a second state so as to discharge the power circuit through the discharge circuit.

[0030] Secondly, this utility model provides a power supply module, including any of the discharge circuits described in the first aspect above.

[0031] Thirdly, this utility model provides an unmanned aerial vehicle, including a main unit, the power module described in the second aspect above, and a removable battery;

[0032] The power module is housed within the casing of the removable battery.

[0033] Fourthly, this utility model provides an electronic device, including the power module and removable battery described in the second aspect above.

[0034] The aforementioned discharge circuit, power module, unmanned aerial vehicle, and electronic device include a discharge circuit connected between the power circuit and ground. This discharge circuit has a first state and a second state. The impedance of the discharge circuit in the second state is less than that in the first state. It also includes a trigger circuit connected to the discharge circuit. This trigger circuit controls the discharge circuit to be in the second state when a change in the power state of the power circuit is detected, thereby discharging the power circuit through the discharge circuit. In this way, when the trigger circuit detects a change in the power state of the power circuit, such as during rapid plugging and unplugging of the power supply, it controls the discharge circuit to be in the second state. Because the impedance of the discharge circuit in the second state is less than that in the first state, the discharge speed of the power circuit can be increased, thereby avoiding power arcing problems caused by slow discharge speed and increasing safety and reliability during power state changes. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the discharge circuit provided in one embodiment;

[0037] Figure 2 This is a schematic diagram of the discharge circuit provided in another embodiment;

[0038] Figure 3 This is a schematic diagram of the discharge circuit provided in another embodiment;

[0039] Figure 4 This is a schematic diagram of the discharge circuit provided in another embodiment;

[0040] Figure 5 This is a schematic diagram of the discharge circuit provided in another embodiment;

[0041] Figure 6 This is a schematic diagram of the discharge circuit provided in another embodiment;

[0042] Figure 7 This is a schematic diagram of the discharge circuit provided in another embodiment;

[0043] Figure 8 This is a schematic diagram of the discharge circuit provided in another embodiment;

[0044] Figure 9 This is a schematic diagram of the power module provided in another embodiment;

[0045] Figure 10 A schematic diagram of the structure of an unmanned aerial vehicle provided in another embodiment;

[0046] Figure 11 This is a schematic diagram of the structure of an electronic device provided in another embodiment.

[0047] Explanation of key component designations:

[0048] Discharge circuit 100; bleeder circuit 10; power supply circuit 20; trigger circuit 30; load circuit 40;

[0049] First discharge branch 11; discharge switch 111; first discharge resistor 112; transistor 1111;

[0050] Second discharge branch 12; Second discharge resistor 121;

[0051] Comparator 31; First voltage divider resistor 41; Second voltage divider resistor 42;

[0052] Third voltage divider resistor 51; Fourth voltage divider resistor 52; Fifth voltage divider resistor 53; Sixth voltage divider resistor 54;

[0053] First pull-up resistor 61; First current-limiting resistor 62;

[0054] Contact switch 32; second pull-up resistor 81; second current-limiting resistor 82; diode 83. Detailed Implementation

[0055] To make the objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0056] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0057] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0058] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0059] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0060] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0061] In the description of this specification, references to terms such as "some embodiments," "other embodiments," and "ideal embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0062] In the embodiments of this application, such as Figure 1 As shown, a discharge circuit 100 is provided, wherein the discharge circuit 100 includes: a discharge circuit 10 connected between a power supply circuit 20 and ground, the discharge circuit 10 having a first state and a second state, and the impedance of the discharge circuit 10 in the second state being less than the impedance in the first state.

[0063] The trigger circuit 30 is connected to the discharge circuit 10. The trigger circuit 30 is used to control the discharge circuit 10 to be in a second state when a change in the power state of the power circuit 20 is detected, so as to discharge the power circuit 20 through the discharge circuit 10.

[0064] In this circuit, the power supply circuit 20 can be a circuit containing a capacitor in the load. The capacitor stores electrical charge; the larger the capacitor, the more charge it stores. Therefore, when the power state of the power supply circuit 20 changes, if the discharge rate of the power supply circuit 20 is slow, the residual voltage formed by the stored charge may cause arcing if it cannot be discharged in time. Therefore, a discharge circuit 10 is needed to discharge the power supply circuit 20 when its power state changes. Optionally, the change in the power state of the power supply circuit 20 can occur when the battery in the power supply circuit 20 is quickly inserted or removed.

[0065] Optionally, the discharge circuit 10 has two operating states. The impedance of the discharge circuit 10 in the second state is less than that in the first state. For example, different resistors can be configured in the first and second states to make the impedance in the second state less than that in the first state. When the trigger circuit 30 detects a change in the power state of the power supply circuit 20, such as a rapid switching on and off of the power supply circuit 20, in order to avoid arcing, the discharge circuit 10 needs to discharge the power supply circuit 20 quickly. Therefore, the trigger circuit 30 controls the discharge circuit 10 to be in the second state. Since the impedance in the second state is smaller, the discharge speed is faster. Optionally, the trigger circuit 30 can be a comparison circuit, which determines whether the power state of the power supply circuit 20 has changed by comparing the voltage of the power supply circuit 20 with a preset voltage value. The trigger circuit 30 can also be a detection circuit, which determines whether the power state of the power supply circuit 20 has changed by detecting the connection status of the power supply of the power supply circuit 20. This embodiment does not limit the specific implementation.

[0066] In the above embodiment, the discharge circuit includes a bleeder circuit connected between the power supply circuit and ground. The bleeder circuit has a first state and a second state. The impedance of the bleeder circuit in the second state is less than that in the first state. The circuit also includes a trigger circuit connected to the bleeder circuit. The trigger circuit controls the bleeder circuit to be in the second state when a change in the power supply state of the power supply circuit is detected, so as to discharge the power supply circuit through the bleeder circuit. In this way, when the trigger circuit detects a change in the power supply state of the power supply circuit, such as during rapid plugging and unplugging of the power supply, it controls the bleeder circuit to be in the second state. Since the impedance of the bleeder circuit in the second state is less than that in the first state, the discharge speed of the power supply circuit can be increased, thereby avoiding power arcing problems caused by slow discharge speed and increasing the safety and reliability during the power supply state change process.

[0067] In the embodiments of this application, such as Figure 2 As shown, the discharge circuit 10 includes a first discharge branch 11, which includes a discharge switch 111 and a first discharge resistor 112. The discharge switch 111 includes a transistor 1111.

[0068] The discharge switch 111 and the first discharge resistor 112 are connected. The opening and closing of the discharge switch 111 controls the conduction and de-conduction of the first discharge branch 11. When the discharge switch 111 is closed, the first discharge branch 11 is conducting, and the power supply circuit 20 can discharge through the first discharge resistor 112. When the discharge switch 111 is open, the first discharge branch 11 is not conducting. Optionally, the transistor 1111 can be a PNP transistor, and the first discharge resistor 112 can have a resistance of 100 ohms.

[0069] Optional, please continue to refer to Figure 2 The discharge circuit 10 includes a second discharge branch 12 connected in parallel with the first discharge branch 11. The second discharge branch 12 includes a second discharge resistor 121, and the resistance value of the second discharge resistor 121 is greater than the resistance value of the first discharge resistor 112.

[0070] In the case that the first discharge branch 11 is not conducting, the power supply circuit 20 can discharge through the second discharge branch 12. Optionally, the resistance value of the second discharge resistor 121 of the second discharge branch 12 can be 5.1K ohms.

[0071] Optionally, the second state of the discharge circuit 10 is when the first discharge branch 11 is conducting. In this state, the impedance of the discharge circuit 10 is equal to the parallel impedance of the first discharge branch 11 and the second discharge branch 12. Since the resistance of the first discharge resistor 112 is less than the resistance of the second discharge resistor 121, it can be known from the parallel circuit resistance calculation method that the impedance of the discharge circuit 10 in the second state is less than the resistance of the first discharge resistor 112. The first state of the discharge circuit 10 is when the first discharge branch 11 is not conducting. In this state, the impedance of the discharge resistor 10 is equal to the resistance of the second discharge branch 12, which is greater than the resistance in the second state. Therefore, the discharge speed of the discharge circuit in the second state is faster than the discharge speed in the first state.

[0072] In the above embodiments, the discharge circuit includes a first discharge branch and a second discharge branch. When the first discharge branch is turned on, the discharge circuit operates in the second state, which can quickly discharge the power supply circuit. When the first discharge branch is not turned on, the discharge circuit operates in the first state. At this time, the impedance of the discharge circuit is relatively large, which can avoid increasing the power consumption of the power supply circuit.

[0073] In one embodiment, such as Figure 3 As shown, the trigger circuit 30 includes a comparator 31. The first input terminal of the comparator 31 is connected to the load circuit 40 powered by the power supply circuit 20, the second input terminal of the comparator 31 is connected to the power supply circuit 20, and the output terminal of the comparator 31 is connected to the discharge switch 111.

[0074] Optional, please continue to refer to Figure 3 The discharge switch 111 includes a transistor 1111. The control terminal of the transistor 1111 is connected to the output terminal of the comparator 31. The first terminal of the transistor 1111 is connected to the power supply circuit 20. The second terminal of the transistor 1111 is connected to the first discharge resistor 112.

[0075] The comparator 31 can be a voltage comparator. The first input terminal of the comparator 31 can be the positive input terminal of the comparator 31, which is connected to the load circuit 40 to obtain the voltage value of the load circuit 40. The second input terminal of the comparator 31 can be the negative input terminal of the comparator 31, which is connected to the power supply circuit 20 to obtain the voltage value of the power supply circuit 20. The output terminal of the comparator 31 is connected to the discharge switch 111. By comparing the voltage values ​​of the first input terminal and the second input terminal, the output can control the closing and opening of the discharge switch 111.

[0076] In the above embodiments, the opening and closing of the discharge switch is controlled by the output terminal of the comparator, thereby controlling whether the first discharge branch of the discharge circuit is conducting, and realizing the control of the discharge of the power supply circuit.

[0077] In one embodiment, such as Figure 4 As shown, the discharge circuit 100 also includes a first voltage divider resistor 41 and a second voltage divider resistor 42; the second input terminal of the comparator 31 is connected to the positive terminal of the power supply circuit 20 through the first voltage divider resistor 41, and the second input terminal of the comparator 31 is connected to the negative terminal of the power supply circuit 20 through the second voltage divider resistor 42.

[0078] The first voltage divider resistor 41 and the second voltage divider resistor 42 are used to divide the voltage of the power supply circuit 20 and connect it to the second input terminal of the comparator 31. Optionally, the resistance of the first voltage divider resistor 41 can be 30K ohms and the resistance of the second voltage divider resistor 42 can be 9.1K ohms.

[0079] In the above embodiments, the voltage of the power supply circuit is divided by the first voltage divider resistor and the second voltage divider resistor and then connected to the comparator, thereby preventing the voltage of the power supply circuit from being too large and exceeding the input voltage range of the comparator.

[0080] In one embodiment, see Figure 5The discharge circuit 100 also includes a voltage divider circuit 50, which includes a third voltage divider resistor 51, a fourth voltage divider resistor 52, a fifth voltage divider resistor 53, and a sixth voltage divider resistor 54. The first input terminal of the comparator 31 is connected to the first terminal of the third voltage divider resistor 51, and the second terminal of the third voltage divider resistor 51 is connected to the first terminal of the fifth voltage divider resistor 53. The second terminal of the fifth voltage divider resistor 53 is connected to the positive terminal. The first input terminal of the comparator 31 is connected to the first terminal of the fourth voltage divider resistor 52, and the second terminal of the fourth voltage divider resistor 52 is grounded. The first terminal of the sixth voltage divider resistor 54 is connected to the second terminal of the third voltage divider resistor 51, and the second terminal of the sixth voltage divider resistor 54 is grounded.

[0081] The voltage divider circuit 50 is used to divide the voltage of the load circuit 40 and connect it to the first input terminal of the comparator 31. Optionally, the voltage output from the power supply circuit 20 to the load circuit 40 is divided by the fifth voltage divider resistor 53 and the sixth voltage divider resistor 54 and then connected to the second terminal of the third voltage divider resistor 51 through point A. The voltage at point A is divided by the third voltage divider resistor 51 and the fourth voltage divider resistor 52 and then connected to the first input terminal of the comparator 31.

[0082] Optionally, the resistance of the third voltage divider resistor 51 can be 1K ohms, the resistance of the fourth voltage divider resistor 52 can be 1K ohms, the resistance of the fifth voltage divider resistor 53 can be 10K ohms, and the resistance of the sixth voltage divider resistor 54 can be 10K ohms.

[0083] In the above embodiments, the voltage of the load circuit is divided by a voltage divider circuit and then connected to the first input terminal of the comparator, thereby preventing the voltage of the load circuit from being too large and exceeding the input voltage range of the comparator.

[0084] In the embodiments of this application, such as Figure 6 As shown, the discharge circuit 100 also includes a first pull-up resistor 61; the output terminal of the comparator 31 is connected to the positive terminal through the first pull-up resistor 61.

[0085] Please continue to refer to this. Figure 6 The discharge circuit 100 also includes a first current-limiting resistor 62; the output terminal of the comparator 31 is connected to the control terminal of the transistor 1111 through the first current-limiting resistor 62.

[0086] The selection of the resistance values ​​of the first pull-up resistor 61 and the first current-limiting resistor 62 needs to take into account power consumption and overall circuit performance matching. The first pull-up resistor 61 can avoid unexpected signal interference in the circuit, and the first current-limiting resistor 62 is used for the performance protection of the transistor 1111 and the stable operation of the circuit, to prevent the transistor 1111 from being damaged by overcurrent.

[0087] Optionally, the first pull-up resistor 61 can have a resistance of 5.1K ohms, and the first current-limiting resistor 62 can have a resistance of 51 ohms.

[0088] Optionally, the sum of the resistance values ​​of the fifth and sixth voltage divider resistors is less than the sum of the resistance values ​​of the first and second voltage divider resistors.

[0089] like Figure 7 The diagram shows the structure of the discharge circuit 100 provided in this embodiment. The load circuit 40 may include two capacitors, with capacities of 100nF and 10uf, connected in parallel. One end of the capacitors is connected to the positive terminal of the power supply circuit, and the other end is grounded. The first input terminal of the comparator 31 is connected to point A of the load circuit 40 to obtain the voltage value at point A. The second input terminal of the comparator 31 is connected to point B of the power supply circuit 20 to obtain the voltage value at point B. When the power supply circuit 20 is working normally, the voltage at point A is higher than the voltage at point B, calculated based on the resistors in the circuit. At this time, the output terminal of the comparator 31 outputs a high level. Since the transistor 1111 is a PNP transistor, it does not conduct when the control electrode is at a high level. At this time, the first discharge branch 11 is not conducting, and the discharge circuit 10 operates in the first state. When the power supply circuit 20 is powered off, as time goes by, because the sum of the resistance values ​​of the fifth voltage divider resistor 53 and the sixth voltage divider resistor 54 is less than the sum of the resistance values ​​of the first voltage divider resistor 41 and the second voltage divider resistor 42, the voltage value at point A will discharge faster than the voltage value at point B. That is, the voltage at point A is less than the voltage at point B. At this time, the output terminal of the comparator 31 outputs a low level, the transistor 1111 is turned on, the first discharge branch 11 is turned on, and the discharge circuit 10 works in the second state, which can quickly discharge the residual voltage of the power supply circuit 20, thereby achieving rapid discharge.

[0090] In the above embodiments, by reasonably selecting the resistance values ​​of each resistor in the discharge circuit, the first discharge branch can be turned on when the power supply state of the power supply circuit changes, thereby realizing rapid discharge of the power supply circuit.

[0091] In another embodiment of this application, such as Figure 8 The trigger circuit 30 shown includes a contact switch 32. The first end of the contact switch 32 is connected to the power supply circuit 20, and the second end of the contact switch 32 is connected to the discharge circuit 10.

[0092] Optionally, the contact switch 32 can be used to control whether the discharge circuit 10 operates in the second state. When the power supply circuit 20 is operating normally, the transistor 1111 is off, and the first discharge branch 11 is not conducting. When the power state of the power supply circuit 20 changes, such as when the battery is removed, the contact switch 32 is triggered, causing the transistor 1111 to conduct and the first discharge branch 11 to conduct. The discharge circuit 10 then operates in the second state, and the power supply circuit 20 is connected to the discharge circuit 10. The residual voltage of the power supply circuit 20 can be rapidly discharged through the discharge circuit 10. Optionally, the contact switch 32 can be installed on the structural component at the battery mounting position of the power supply circuit 20, and it can be activated the instant the battery is removed to achieve rapid discharge when the power state changes.

[0093] In one embodiment, please refer to... Figure 8 The discharge circuit 100 also includes a second pull-up resistor 81; the second terminal of the contact switch 32 is connected to the positive terminal of the power supply circuit through the second pull-up resistor 81.

[0094] Optional, such as Figure 8 As shown, the discharge circuit 100 also includes a second current-limiting resistor 82; the second terminal of the contact switch 32 is connected to the control electrode of the transistor 1111 through the second current-limiting resistor 82.

[0095] The value of the second pull-up resistor 81 needs to be selected considering power consumption and overall circuit performance matching. For example, in the circuit of this application, the value of the second pull-up resistor 81 can be 10K ohms. The second current-limiting resistor 82 has the same function as the first current-limiting resistor 62, which is used to protect the transistor 1111. Optionally, the value of the second current-limiting resistor 82 can be 1K ohms.

[0096] Optional, such as Figure 8 As shown, the discharge circuit 100 also includes a diode 83, one end of which is connected to the second pull-up resistor 81, and the other end of which is connected to the first terminal of the transistor 1111.

[0097] The unidirectional conductivity of diode 83 ensures the direction of current in the circuit.

[0098] In the above embodiments, the working state of the discharge circuit is controlled by a contact switch, so that when the power state of the power circuit changes, the discharge circuit operates in the second state, thereby achieving rapid discharge of residual power in the power circuit and avoiding arcing problems caused by slow discharge speed.

[0099] In another embodiment of this application, the trigger circuit 30 includes a sensor. When the sensor detects a change in the power state of the power circuit 20, it controls the discharge circuit 10 to be in a second state so as to discharge the power circuit 20 through the discharge circuit 10.

[0100] The sensor can be an electronic battery sensor that outputs a control signal when it detects that the battery in the power circuit 20 has been removed, controlling the discharge circuit 10 to enter a second state, allowing the power circuit 20 to discharge rapidly through the discharge circuit 10. The sensor can also be a position sensor that outputs a control signal when it detects a change in the battery position in the power circuit 20, controlling the discharge circuit 10 to enter a second state, allowing the power circuit 20 to discharge rapidly through the discharge circuit 10. Other types of sensors can also be used, as long as they can detect battery insertion and removal; this application does not impose any limitations on this.

[0101] In the above embodiments, when the sensor detects a change in the power state of the power supply circuit, the operating state of the discharge circuit is controlled so that the discharge circuit operates in the second state, thereby achieving rapid discharge of residual power in the power supply circuit and simplifying the detection method.

[0102] In the embodiments of this application, such as Figure 9 As shown, a power module is also provided, including the discharge circuit 100 in the above embodiments.

[0103] In the embodiments of this application, such as Figure 10 As shown, an unmanned aerial vehicle is also provided, including a main unit, a power module as described in the above embodiments, and a removable battery.

[0104] The unmanned aerial vehicle (UAV) includes a main unit, a power module, and a removable battery. The power module is housed within the casing of the removable battery. When the removable battery is quickly inserted or removed, the power module can rapidly discharge through its internal discharge circuit, preventing arcing and increasing the safety and reliability of the UAV.

[0105] In the embodiments of this application, such as Figure 11 As shown, an electronic device is also provided, including the power module and removable battery described in the above embodiments.

[0106] Among them, when the removable battery in the electronic device is quickly plugged in and out, the power module can quickly discharge through the discharge circuit inside the power module, avoiding the electronic device from sparking and increasing the safety and reliability of the electronic device.

[0107] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0108] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A discharge circuit, characterized in that, The discharge circuit includes: A bleeder circuit is connected between a power supply circuit and ground. The bleeder circuit has a first state and a second state. The impedance of the bleeder circuit in the second state is less than the impedance in the first state. The bleeder circuit includes a first bleeder branch, which includes a bleeder switch and a first bleeder resistor. The bleeder switch and the first bleeder resistor are connected. The power supply circuit discharges through the first bleeder resistor of the first bleeder branch. A trigger circuit, connected to the discharge circuit, is used to control the discharge circuit to a second state when a change in the power state of the power circuit is detected, so as to discharge the power circuit through the discharge circuit.

2. The discharge circuit according to claim 1, characterized in that, The discharge switch includes a transistor.

3. The discharge circuit according to claim 2, characterized in that, The discharge circuit includes a second discharge branch connected in parallel with the first discharge branch. The second discharge branch includes a second discharge resistor, the resistance of which is greater than that of the first discharge resistor.

4. The discharge circuit according to claim 2, characterized in that, The trigger circuit includes a comparator, the first input terminal of which is connected to the load circuit powered by the power supply circuit, the second input terminal of which is connected to the power supply circuit, and the output terminal of which is connected to the discharge switch.

5. The discharge circuit according to claim 4, characterized in that, The control terminal of the transistor is connected to the output terminal of the comparator, the first terminal of the transistor is connected to the power supply circuit, and the second terminal of the transistor is connected to the first bleeder resistor.

6. The discharge circuit according to claim 5, characterized in that, The discharge circuit also includes a first voltage divider resistor and a second voltage divider resistor; The second input terminal of the comparator is connected to the positive terminal of the power supply circuit through the first voltage divider resistor, and the second input terminal of the comparator is connected to the negative terminal of the power supply circuit through the second voltage divider resistor.

7. The discharge circuit according to claim 6, characterized in that, The discharge circuit further includes a voltage divider circuit, which includes a third voltage divider resistor, a fourth voltage divider resistor, a fifth voltage divider resistor, and a sixth voltage divider resistor. The first input terminal of the comparator is connected to the first terminal of the third voltage divider resistor, and the second terminal of the third voltage divider resistor is connected to the first terminal of the fifth voltage divider resistor; the second terminal of the fifth voltage divider resistor is connected to the positive terminal. The first input terminal of the comparator is connected to the first terminal of the fourth voltage divider resistor, and the second terminal of the fourth voltage divider resistor is grounded. The first end of the sixth voltage divider resistor is connected to the second end of the third voltage divider resistor, and the second end of the sixth voltage divider resistor is grounded.

8. The discharge circuit according to claim 7, characterized in that, The discharge circuit also includes a first pull-up resistor; The output of the comparator is connected to the positive terminal through the first pull-up resistor.

9. The discharge circuit according to claim 8, characterized in that, The discharge circuit also includes a first current-limiting resistor; The output of the comparator is connected to the control terminal of the transistor through the first current-limiting resistor.

10. The discharge circuit according to claim 9, characterized in that, The sum of the resistance values ​​of the fifth and sixth voltage divider resistors is less than the sum of the resistance values ​​of the first and second voltage divider resistors.

11. The discharge circuit according to claim 2, characterized in that, The triggering circuit includes a contact switch, the first end of which is connected to the power supply circuit, and the second end of which is connected to the discharge circuit.

12. The discharge circuit according to claim 11, characterized in that, The discharge circuit also includes a second pull-up resistor; The second terminal of the contact switch is connected to the positive terminal of the power supply circuit through the second pull-up resistor.

13. The discharge circuit according to claim 12, characterized in that, The discharge circuit also includes a second current-limiting resistor; The second terminal of the contact switch is connected to the control terminal of the transistor through the second current-limiting resistor.

14. The discharge circuit according to claim 13, characterized in that, The discharge circuit also includes a diode, one end of which is connected to the second pull-up resistor, and the other end of which is connected to the first terminal of the transistor.

15. The discharge circuit according to claim 2, characterized in that, The trigger circuit includes a sensor. When the sensor detects a change in the power state of the power circuit, it controls the discharge circuit to be in a second state so as to discharge the power circuit through the discharge circuit.

16. A power supply module, characterized in that, The power module includes the discharge circuit described in any one of claims 1 to 15.

17. An unmanned aerial vehicle, characterized in that, The unmanned aircraft includes a main unit, a power module as described in claim 16, and a removable battery; The power module is housed within the casing of the removable battery.

18. An electronic device, characterized in that, The electronic device includes the power module as described in claim 16 and a removable battery.

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