Low-power-consumption key circuit and energy storage device

Abstract

The utility model discloses a low-power-consumption key circuit and energy storage equipment. The key circuit comprises a key, and the first end of the key is grounded through a first diode and a first resistor; one end of the current limiting circuit is connected with the second end of the key; the key signal detection circuit is connected with the other end of the current limiting circuit and is used for detecting a key signal; wherein the current limiting circuit is used for limiting the current of the key circuit when the connection duration after the first end of the key and the second end of the key are electrically connected exceeds the preset duration. And when the connection duration after the first end of the key and the second end of the key are electrically connected exceeds the preset duration, the current of the key circuit is limited through the current limiting circuit, that is, the current of the key circuit is reduced when the key is stuck for a long time, so that the power consumption of the key circuit is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of power supplies, and particularly to a low-power button circuit and an energy storage device. Background Art

[0002] With the rapid development of energy storage technology, users have put forward higher requirements for the simplicity and safety of device operation. Currently, household energy storage devices or portable energy storage devices usually use a single switch button to implement the on / off and status display functions of the device. Specifically, a long press of the switch button is used to control the startup or shutdown of the energy storage device, and a short press of the switch button is used to display the current working status of the energy storage device.

[0003] Since there is only one switch button, and the button signal of the switch button needs to be transmitted to both the battery protection system (Battery Management System, BMS) board and the main control board of the energy storage device at the same time, the button signal needs to be transmitted across the board.

[0004] When the switch button is stuck for a long time due to mechanical failure or other reasons, the energy storage device may continuously receive incorrect button signals, resulting in high power consumption. Summary of the Utility Model

[0005] The main technical problem to be solved by the present application is to provide a low-power button circuit and an energy storage device, so as to solve the problem of high power consumption when the button is stuck for a long time.

[0006] The present application provides a low-power button circuit, including:

[0007] A button, the first end of the button is grounded through a first diode and a first resistor;

[0008] A current limiting circuit, one end of the current limiting circuit is connected to the second end of the button;

[0009] A button signal detection circuit, connected to the other end of the current limiting circuit, for detecting button signals;

[0010] Wherein, the current limiting circuit is used to limit the current of the button circuit when the connection duration after the first end and the second end of the button are electrically connected exceeds a preset duration.

[0011] In some embodiments, the current limiting circuit includes a second resistor, a third resistor, a fourth resistor, a first capacitor and a second capacitor. One end of the second resistor receives a reference voltage, the other end of the second resistor is connected to one end of the fourth resistor through the third resistor, the first capacitor is connected in parallel with the second resistor, the other end of the fourth resistor is connected to the second end of the button, and the second capacitor is connected in parallel with the fourth resistor.

[0012] In some embodiments, the resistance value of the fourth resistor is greater than that of the second resistor, and the resistance value of the third resistor is less than that of the second resistor.

[0013] In some embodiments, when the connection duration after electrically connecting the first end and the second end of the key exceeds the preset duration, the second capacitor is fully charged, and the key signal detection circuit receives the key signal through the third resistor and the fourth resistor.

[0014] In some embodiments, the current limiting circuit further includes a second diode, a third diode, and a third capacitor. The third resistor is connected to the fourth resistor through the second diode. The other end of the fourth resistor is connected to the second end of the key through the third diode. The second end of the key is grounded through the third capacitor.

[0015] In some embodiments, the current limiting circuit further includes a first switching tube, a fifth resistor, and a sixth resistor. The first end of the first switching tube is connected between the third resistor and the second diode. The second end of the first switching tube is connected to the negative electrode of the second diode through the fifth resistor. The third end of the first switching tube is connected between the second capacitor and the third diode through the sixth resistor.

[0016] In some embodiments, when the first end and the second end of the key are disconnected, the first switching tube is turned on, and the second capacitor discharges through the sixth resistor. The resistance value of the sixth resistor is less than that of the second resistor.

[0017] In some embodiments, the key signal detection circuit includes a second switching tube, a seventh resistor, an eighth resistor, a third switching tube, a fourth capacitor, a ninth resistor, and a tenth resistor. The first end of the second switching tube is connected to one end of the second resistor. The second end of the second switching tube is connected to the other end of the second resistor. The third end of the second switching tube is connected to the second end of the third switching tube through the seventh resistor. The first end of the third switching tube is grounded. The third end of the third switching tube is externally connected to the first end of a controller through the eighth resistor. One end of the ninth resistor is connected between the second end of the third switching tube and the seventh resistor. The other end of the ninth resistor is connected to the first end of the third switching tube. One end of the fourth capacitor is connected between the first end of the third switching tube and the ninth resistor. The other end of the fourth capacitor is connected between the third end of the third switching tube and the eighth resistor through the tenth resistor. The second end of the controller is connected between the fourth capacitor and the tenth resistor.

[0018] In some embodiments, when an electrical connection is established between the first end and the second end of the button, the second switching tube is turned on, the third switching tube is turned on, and the second end of the controller is used to receive the button signal.

[0019] The present application also provides an energy storage device, including the above-mentioned button circuit and a controller, where the controller is connected to the button circuit and is configured to receive a button signal from the button circuit.

[0020] The beneficial effect of the present application is as follows: The present application provides a low-power button circuit and an energy storage device. The button circuit includes: a button, the first end of the button is grounded through a first diode and a first resistor; a current limiting circuit, one end of the current limiting circuit is connected to the second end of the button; a button signal detection circuit, connected to the other end of the current limiting circuit for detecting a button signal; wherein, the current limiting circuit is configured to limit the current of the button circuit when the connection duration after the electrical connection between the first end and the second end of the button exceeds a preset duration. By limiting the current of the button circuit when the connection duration exceeds the preset duration, that is, reducing the current of the button circuit when the button is stuck for a long time, thereby reducing the power consumption of the button circuit. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. Among them:

[0022] Figure 1 is a circuit schematic diagram of an embodiment of the button circuit provided by the present application. Detailed Embodiments

[0023] The following will describe in detail the embodiments of the technical solutions of the present application in conjunction with the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore are only examples and cannot be used to limit the protection scope of the present application.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above description of the drawings are intended to cover non-exclusive inclusion.

[0025] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality" is more than two, unless otherwise clearly and specifically defined.

[0026] Reference to "embodiments" in this context means that a particular feature, structure, or characteristic described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase may not necessarily refer to the same embodiment when it appears in various places in the specification, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0027] In the description of the embodiments of the present application, the term "and / or" is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this text generally represents an "or" relationship between the associated objects before and after.

[0028] In the description of the embodiments of the present application, the term "a plurality" refers to more than two (including two). Similarly, "a plurality of groups" refers to more than two groups (including two groups), and "a plurality of pieces" refers to more than two pieces (including two pieces).

[0029] In the description of the embodiments of the present application, technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0030] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "coupling", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0031] In the prior art, portable energy storage devices usually use a single switch button to implement the functions of turning the device on and off and status display. When the switch button is stuck for a long time due to mechanical failure or other reasons, the energy storage device may continuously receive incorrect button signals, resulting in high power consumption.

[0032] To address this, the present application provides a low-power button circuit to solve the problem of high power consumption caused by the button being stuck for a long time.

[0033] Please refer to Figure 1 as shown Figure 1 is a schematic circuit diagram of an embodiment of the button circuit provided by the present application. A low-power button circuit 10 provided by the present application, the button circuit 10 of this embodiment is applied to an energy storage device, and the energy storage device includes but is not limited to an energy storage box or an outdoor power supply, etc.

[0034] The button circuit 10 of this embodiment includes a button 11, a current-limiting circuit 12, a button signal detection circuit 13, a first diode D1, and a first resistor R1.

[0035] The button 11 has a first end 111 and a second end 112. When the button 11 is pressed or stuck, the first end 111 is connected to the second end 112 of the button 11. Among them, the second end 112 of the button 11 is grounded through the first diode D1 and the first resistor R1.

[0036] One end of the current-limiting circuit 12 is connected to the second end 112 of the button 11, and the button signal detection circuit 13 is connected to the other end of the current-limiting circuit 12.

[0037] The button signal detection circuit 13 is used to detect the button signal, where the button signal refers to the signal generated when the first end 111 and the second end 112 of the button 11 are connected.

[0038] Optionally, the button 11 has a short-press state and a long-press state; when the button 11 is in the short-press state, the connection duration after the first end 111 and the second end 112 of the button 11 are electrically connected is shorter; when the button 11 is in the long-press state, the connection duration after the first end 111 and the second end 112 of the button 11 are electrically connected is longer. That is, when the button 11 is in the short-press state, the connection duration after the first end 111 and the second end 112 of the button 11 are electrically connected is less than the connection duration after the first end 111 and the second end 112 of the button 11 are electrically connected when the button 11 is in the long-press state.

[0039] Among them, the current limiting circuit 12 is used to limit the current of the key circuit 10 when the connection duration after the first end 111 and the second end 112 of the key 11 are electrically connected exceeds a preset duration. The preset duration can be the connection duration after the first end 111 and the second end 112 of the key 11 are electrically connected when the key 11 is in a long-press state; when the connection duration after the first end 111 and the second end 112 of the key 11 are electrically connected exceeds the preset duration, it means that the key 11 is stuck.

[0040] The key circuit 10 of this embodiment includes a key 11, a current limiting circuit 12, a key signal detection circuit 13, a first diode D1, and a first resistor R1. One end of the current limiting circuit 12 is connected to the second end 112 of the key 11, and the key signal detection circuit 13 is connected to the other end of the current limiting circuit 12. The current limiting circuit 12 is used to limit the current of the key circuit 10 when the connection duration after the first end 111 and the second end 112 of the key 11 are electrically connected exceeds a preset duration; when the connection duration after the first end 111 and the second end 112 of the key 11 are electrically connected exceeds the preset duration, the current of the key circuit 10 is limited through the current limiting circuit 12, that is, when the key 11 is stuck for a long time, the current of the key circuit 10 is reduced, thereby reducing the power consumption of the key circuit 10.

[0041] According to some embodiments of the present application, the current limiting circuit 12 includes a second resistor R2, a third resistor R3, a fourth resistor R4, a first capacitor C1, and a second capacitor C2.

[0042] One end of the second resistor R2 receives a reference voltage, and the reference voltage can be 5V. The other end of the second resistor R2 is connected to one end of the fourth resistor R4 through the third resistor R3, and the other end of the fourth resistor R4 is connected to the second end 112 of the key 11.

[0043] The first capacitor C1 is connected in parallel with the second resistor R2, and the second capacitor C2 is connected in parallel with the fourth resistor R4; the second capacitor C2 and the fourth resistor R4 form a charge and discharge circuit.

[0044] According to some embodiments of the present application, the key signal detection circuit 13 includes a second switching tube Q2, a seventh resistor R7, an eighth resistor R8, a third switching tube Q3, a fourth capacitor C4, a ninth resistor R9, and a tenth resistor R10.

[0045] The first end of the second switching transistor Q2 is connected to one end of the second resistor R2, the second end of the second switching transistor Q2 is connected to the other end of the second resistor R2, and the third end of the second switching transistor Q2 is connected to the second end of the third switching transistor Q3 through the seventh resistor R7; the first end of the third switching transistor Q3 is grounded, and the third end of the third switching transistor Q3 is externally connected to the first end of the controller 20 through the eighth resistor R8; one end of the ninth resistor R9 is connected between the second end of the third switching transistor Q3 and the seventh resistor R7, and the other end of the ninth resistor R9 is connected to the first end of the third switching transistor Q3; one end of the fourth capacitor C4 is connected between the first end of the third switching transistor Q3 and the ninth resistor R9, and the other end of the fourth capacitor C4 is connected to the third end of the third switching transistor Q3 and the eighth resistor R8 through the tenth resistor R10, and the second end of the controller 20 is connected between the fourth capacitor C4 and the tenth resistor R10.

[0046] The controller 20 can be a controller of an energy storage device, and the controller 20 includes but is not limited to a micro-programmed control unit (MCU), a digital signal processor, or a field programmable gate array (FPGA). Among them, the controller 20 obtains a key signal through the key signal detection circuit 13.

[0047] Among them, the first end of the controller 20 is used to provide a voltage of 3V for the key signal detection circuit 13. When the second switching transistor Q2 is not turned on, the third switching transistor Q3 is not turned on, and at this time, a high level is detected at the second end of the controller 20. When the second switching transistor Q2 is turned on, the third switching transistor Q3 is turned on, and at this time, a low level is detected at the second end of the controller 20, that is, a key signal is received. In other embodiments, the first end of the controller 20 is used to provide other voltages for the key signal detection circuit 13, such as 4V or 5V, etc.

[0048] When an electrical connection is established between the first end 111 and the second end 112 of the key 11, that is, when the key 11 is pressed, the second switching transistor Q2 is turned on, the third switching transistor Q3 is turned on, and at this time, the second end of the controller 20 receives the key signal to detect that the key 11 is pressed.

[0049] Among them, the second resistor R2 is connected between the first end and the second end of the second switching transistor Q2. Assuming that the resistance value of the second resistor R2 is 100 kΩ, when the key 11 is not pressed, that is, the first end 111 and the second end 112 of the key 11 are disconnected, the second resistor R2 receives an interference signal. Due to the large resistance value of the second resistor R2, the voltage difference between the first end and the second end of the second switching transistor Q2 is large, resulting in the second switching transistor Q2 and the third switching transistor Q3 being turned on, and further the controller 20 misjudges that the key 11 is pressed.

[0050] The resistance value of the second resistor R2 in this embodiment becomes smaller. For example, the resistance value of the second resistor R2 is 10 kΩ. When the button 11 is not pressed, the second resistor R2 receives interference signals, and the voltage difference between the first end and the second end of the second switching transistor Q2 is small. The second switching transistor Q2 and the third switching transistor Q3 are not turned on, which can avoid misjudgment of the controller 20 and improve the anti-interference ability of the button circuit 10.

[0051] Since the resistance value of the second resistor R2 becomes smaller, the current flowing through the second resistor R2 becomes larger, so the power consumption of the second resistor R2 increases. In this embodiment, by setting the third resistor R3 and the fourth resistor R4, the third resistor R3 and the fourth resistor R4 are connected in series with the second resistor R2, reducing the current flowing through the second resistor R2, thereby reducing the power consumption of the second resistor R2 and reducing the power consumption of the button circuit 10.

[0052] According to some embodiments of the present application, the resistance value of the fourth resistor R4 is greater than the resistance value of the second resistor R2, and the resistance value of the third resistor R3 is less than the resistance value of the second resistor R2.

[0053] In this embodiment, the resistance value of the fourth resistor R4 is greater than the resistance value of the second resistor R2, and the resistance value of the third resistor R3 is less than the resistance value of the second resistor R2, so as to increase the resistance value of the button circuit 10, reduce the current flowing through the second resistor R2, thereby reducing the power consumption of the second resistor R2 and reducing the power consumption of the button circuit 10.

[0054] For example, the resistance value of the fourth resistor R4 is 1 MΩ, the resistance value of the second resistor R2 is 10 kΩ, and the resistance value of the third resistor R3 is 1 kΩ; when a connection is established between the first end 111 and the second end 112 of the button 11, since the resistance value of the fourth resistor R4 is large, the current flowing through the fourth resistor R4, the second resistor R2, and the third resistor R3 is small, thereby reducing the power consumption of the second resistor R2 and reducing the power consumption of the button circuit 10.

[0055] According to some embodiments of the present application, when an electrical connection is established between the first end 111 and the second end 112 of the button 11, the button signal is transmitted through the second capacitor C2, that is, the second capacitor C2 is charged.

[0056] When the connection duration after the electrical connection between the first end 111 and the second end 112 of the button 11 exceeds a preset duration, that is, when the button 11 is stuck for a long time, the second capacitor C2 is fully charged, and the button signal detection circuit 13 receives the button signal through the third resistor R3 and the fourth resistor R4.

[0057] When the second capacitor C2 is fully charged, the second capacitor C2 is equivalent to being disconnected, and the key signal is transmitted through the fourth resistor R4. Since the resistance value of the fourth resistor R4 is relatively large, the current flowing through the fourth resistor R4 and the third resistor R3 is less than 10 microamps, reducing the power consumption of the key circuit 10.

[0058] According to some embodiments of the present application, the current limiting circuit 12 further includes a second diode D2, a third diode D3, a third capacitor C3, a first switching transistor Q1, a fifth resistor R5, and a sixth resistor R6.

[0059] The third resistor R3 is connected to the fourth resistor R4 through the second diode D2. The other end of the fourth resistor R4 is connected to the second end 112 of the key 11 through the third diode D3. The second end 112 of the key 11 is grounded through the third capacitor C3.

[0060] The first end of the first switching transistor Q1 is connected between the third resistor R3 and the second diode D2. The second end of the first switching transistor Q1 is connected to the negative electrode of the second diode D2 through the fifth resistor R5. The third end of the first switching transistor Q1 is connected between the second capacitor C2 and the third diode D3 through the sixth resistor R6.

[0061] When the first end 111 and the second end 112 of the key 11 are disconnected, that is, the key 11 is reset, the first switching transistor Q1 is turned on. At this time, the second capacitor C2 and the sixth resistor R6 form a discharge circuit.

[0062] Specifically, the second diode D2 is connected between the first end and the second end of the first switching transistor Q1. When the key 11 is reset, the voltage at the first end of the first switching transistor Q1 becomes 5V, the second end of the first switching transistor Q1 maintains the original voltage, a voltage difference is formed between the first end and the second end of the first switching transistor Q1, the first switching transistor Q1 is turned on, and the second capacitor C2 discharges through the sixth resistor R6.

[0063] Among them, the resistance value of the sixth resistor R6 is less than the resistance value of the second resistor R2. For example, the resistance value of the sixth resistor R6 is 100Ω, and the current flowing through the sixth resistor R6 becomes larger, improving the discharge efficiency of the second capacitor C2. Therefore, when the key 11 is reset, the first switching transistor Q1 is turned on, and the second capacitor C2 discharges quickly through the sixth resistor R6, realizing the recognition of the next quick key signal.

[0064] Since the resistance value of the fourth resistor R4 is large, the current flowing through the fourth resistor R4 is small, and the time for the second capacitor C2 to discharge through the fourth resistor R4 is too long. In this embodiment, by adding a second diode D2, a first switching transistor Q1, and a sixth resistor R6, the second diode D2 is connected between the first end and the second end of the first switching transistor Q1. When the first switching transistor Q1 is turned on, the second capacitor C2 discharges through the sixth resistor R6, increasing the discharge efficiency of the second capacitor C2, realizing the recognition of the next fast key signal, and further realizing the recognition of continuous and fast key signals.

[0065] Optionally, the first switching transistor Q1 of the present application is a P-type MOS transistor, the second switching transistor Q2 is a P-type MOS transistor, and the third switching transistor Q3 is an N-type MOS transistor. In other embodiments, the types of the first switching transistor Q1, the second switching transistor Q2, and the third switching transistor Q3 are set according to actual situations.

[0066] The present application also provides an energy storage device, which includes but is not limited to an energy storage box or an outdoor power supply, etc. The energy storage device of this embodiment includes the controller 20 of the above embodiment and the key circuit 10 of the above embodiment, which will not be elaborated here. The controller 20 is connected to the key circuit 10 and is used to receive key signals from the key circuit 10.

[0067] In summary, when the connection duration after electrically connecting the first end 111 and the second end 112 of the key 11 exceeds a preset duration, the present application limits the current of the key circuit 10 through the current limiting circuit 12, that is, reduces the current of the key circuit 10 when the key 11 is stuck for a long time, thereby reducing the power consumption of the key circuit 10.

[0068] The above are only the embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied to other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. A low-power key circuit, characterized in that, Comprising: A button, the first end of the button is grounded through a first diode and a first resistor; A current limiting circuit, one end of the current limiting circuit is connected to the second end of the button; A button signal detection circuit, connected to the other end of the current limiting circuit, for detecting button signals; Wherein, the current limiting circuit is used to limit the current of the button circuit when the connection duration after the first end and the second end of the button are electrically connected exceeds a preset duration.

2. The key circuit according to claim 1, wherein The current limiting circuit includes a second resistor, a third resistor, a fourth resistor, a first capacitor and a second capacitor. One end of the second resistor receives a reference voltage, the other end of the second resistor is connected to one end of the fourth resistor through the third resistor, the first capacitor is connected in parallel with the second resistor, the other end of the fourth resistor is connected to the second end of the button, and the second capacitor is connected in parallel with the fourth resistor.

3. The key circuit according to claim 2, characterized in that, The resistance value of the fourth resistor is greater than that of the second resistor, and the resistance value of the third resistor is less than that of the second resistor.

4. The key circuit according to claim 3, wherein When the connection duration after the first end and the second end of the button are electrically connected exceeds the preset duration, the second capacitor is fully charged, and the button signal detection circuit receives the button signal through the third resistor and the fourth resistor.

5. The key circuit according to claim 3, wherein The current limiting circuit further includes a second diode, a third diode and a third capacitor. The third resistor is connected to the fourth resistor through the second diode, the other end of the fourth resistor is connected to the second end of the button through the third diode, and the second end of the button is grounded through the third capacitor.

6. The key circuit according to claim 5, wherein The current limiting circuit further includes a first switching tube, a fifth resistor and a sixth resistor. The first end of the first switching tube is connected between the third resistor and the second diode, the second end of the first switching tube is connected to the negative electrode of the second diode through the fifth resistor, and the third end of the first switching tube is connected between the second capacitor and the third diode through the sixth resistor.

7. The key circuit according to claim 6, wherein When the first end and the second end of the button are disconnected, the first switching tube conducts, and the second capacitor discharges through the sixth resistor. The resistance value of the sixth resistor is less than that of the second resistor.

8. The key circuit according to claim 6, wherein The key signal detection circuit includes a second switching transistor, a seventh resistor, an eighth resistor, a third switching transistor, a fourth capacitor, a ninth resistor, and a tenth resistor. The first end of the second switching transistor is connected to one end of the second resistor, the second end of the second switching transistor is connected to the other end of the second resistor, the third end of the second switching transistor is connected to the second end of the third switching transistor through the seventh resistor, the first end of the third switching transistor is grounded, the third end of the third switching transistor is externally connected to the first end of a controller through the eighth resistor, one end of the ninth resistor is connected between the second end of the third switching transistor and the seventh resistor, the other end of the ninth resistor is connected to the first end of the third switching transistor, one end of the fourth capacitor is connected between the first end of the third switching transistor and the ninth resistor, and the other end of the fourth capacitor is connected to the third end of the third switching transistor and the eighth resistor through the tenth resistor. The second end of the controller is connected between the fourth capacitor and the tenth resistor.

9. The key circuit according to claim 8, characterized in that When the first end and the second end of the key establish an electrical connection, the second switching transistor conducts, the third switching transistor conducts, and the second end of the controller is used to receive the key signal.

10. An energy storage device, characterized in that, It includes the key circuit and the controller according to any one of claims 1-9, and the controller is connected to the key circuit for receiving the key signal from the key circuit.

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