Startup and shutdown circuit and energy storage equipment

Abstract

The utility model provides a startup and shutdown circuit which comprises a control unit, the control unit comprises a power supply end, a detection end and a control end, and the startup and shutdown circuit further comprises a first switch unit, a voltage dividing unit, a second switch unit, a first diode, a second diode and a key unit. According to the utility model, through the arrangement of the first switch unit and the second switch unit, when the equipment is in a power-on state, after the key unit is pressed down, the power output end, the first switch unit, the second diode and the key unit form an access, and the detection end can detect the change of voltage before and after the key unit is pressed down. The control unit can control the first connecting end and the second connecting end of the second switch unit to be disconnected through the control end on the basis, and after the key unit is bounced, the first switch unit is cut off, so that the power output end of the energy storage battery and the equipment load are all cut off during shutdown, and the energy storage battery can be thoroughly powered off during shutdown of the system.

Description

Technical Field

[0001] The utility model relates to the field of electronic technology, and in particular to a switch circuit and an energy storage device. Background Art

[0002] After the energy storage device is shut down, the energy storage battery will continue to power the MCU of the energy storage device, and it will continue to consume some power when it is shut down. As a result, when the device is stored, the energy storage device will automatically lose power. When it is used again after a period of time, the energy storage device will not be able to start up due to the low battery, or if it is turned on, it will shut down after a short period of use.

[0003] Therefore, how to completely cut off the power supply of the energy storage battery when the system is shut down has become a technical problem that needs to be solved urgently. Utility Model Content

[0004] In order to solve the above problems, the utility model proposes a DC power input protection circuit, a power circuit board and an electronic device.

[0005] In a first aspect, the present invention provides a power on / off circuit, including a control unit, the control unit including a power supply terminal, a detection terminal, and a control terminal, the power on / off circuit further including:

[0006] a first switch unit, wherein a first connection end of the first switch unit is electrically connected to the power output end, and a second connection end of the first switch unit is electrically connected to the power end;

[0007] a voltage dividing unit, wherein a first end of the voltage dividing unit is electrically connected to the power output end, and a voltage dividing end of the voltage dividing unit is electrically connected to the controlled end of the first switch unit;

[0008] a second switch unit, wherein a first connection end of the second switch unit is electrically connected to the second end of the voltage dividing unit, a second connection end of the second switch unit is grounded, and a controlled end of the second switch unit is electrically connected to the control end;

[0009] a first diode, wherein an anode of the first diode is electrically connected to the second end of the voltage dividing unit;

[0010] a second diode, wherein an anode of the second diode is electrically connected to the detection end, and the detection end is electrically connected to the second connection end of the first switch unit;

[0011] A key unit, wherein a first end of the key unit is electrically connected to the cathode of the first diode and the cathode of the second diode, and a second end of the key unit is grounded.

[0012] Beneficial effects:

[0013] The utility model sets a first switch unit and a second switch unit. When the device is in the off state, after the button unit is pressed, the power output end, the voltage divider unit, the first diode and the button unit form a path, so that the voltage divider end of the voltage divider unit can drive the controlled end of the first switch unit to connect the first connection end and the second connection end of the first switch unit, thereby causing the control unit to be powered, and the control unit can control the first connection end and the second connection end of the second switch unit to be connected through the control end. Therefore, the power output end, the voltage divider unit and the second switch unit form a path, and after the button unit is bounced up, it does not affect the voltage divider end of the voltage divider unit driving the controlled end of the first switch unit; when the device is in the on state, after the button unit is pressed, the power output end, the first switch unit, the second diode and the button unit form a path. Since the detection end can detect the change in voltage before and after the button unit is pressed, the control unit can control the first connection end and the second connection end of the second switch unit to be disconnected based on this through the control end. After the button unit is bounced up, the first switch unit is cut off, so that the power output end of the energy storage battery and the device load are completely disconnected when the device is shut down. Therefore, the present invention provides a hardware architecture that helps the energy storage battery to completely cut off power when the system is shut down.

[0014] Furthermore, the voltage dividing unit includes at least a first resistor R1 and a second resistor R2, the first end of the first resistor R1 is electrically connected to the power supply output end, the second end of the first resistor R1 and the first end of the second resistor R2 are electrically connected to the controlled end of the first switching unit, and the second end of the second resistor R2 is electrically connected to the first connection end of the second switching unit.

[0015] Furthermore, the second switching unit includes a second diode Q2 and a third resistor R3, the collector of the second diode Q2 is electrically connected to the second end of the voltage divider unit, the base of the second diode Q2 is electrically connected to the first end of the third resistor R3, the second end of the third resistor R3 is electrically connected to the control end, and the emitter of the second diode Q2 is grounded.

[0016] Furthermore, the second switch unit further includes a fourth resistor R4 , a first end of the fourth resistor R4 is electrically connected to the base of the second diode Q2 and the first end of the third resistor R3 , and a second end of the fourth resistor R4 is grounded.

[0017] Furthermore, the circuit further includes a voltage transformation unit, an input end of the voltage transformation unit is electrically connected to the second connection end of the first switch unit, and an output end of the voltage transformation unit is electrically connected to the power supply end.

[0018] Furthermore, the circuit also includes a constant voltage unit, which includes a sixth resistor R6 and a constant voltage chip U1, the first end of the sixth resistor is electrically connected to the output end of the voltage transformation unit, the second end of the sixth resistor is electrically connected to the input end of the constant voltage chip U1, and the output end of the constant voltage chip U1 is electrically connected to the power supply end.

[0019] Furthermore, the constant voltage unit further includes a first capacitor C1, a first end of the first capacitor C1 is electrically connected to the first end of the sixth resistor and the output end of the voltage transformation unit, and a second end of the first capacitor C1 is grounded.

[0020] Furthermore, the constant voltage unit further includes a third capacitor C3, a first end of the third capacitor C3 is electrically connected to the output end of the constant voltage chip U1 and the power end, and a second end of the third capacitor C3 is grounded.

[0021] Furthermore, the circuit also includes a pull-up resistor R5, a first end of the pull-up resistor R5 is electrically connected to the power supply end and the second connection end of the first switch unit, and a second end of the pull-up resistor R5 is electrically connected to the detection end and the anode of the second diode.

[0022] In a second aspect, the present invention provides an energy storage device, comprising an energy storage battery and a switch circuit as described in any one of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0024] Figure 1 A circuit diagram of a power on / off circuit provided by the utility model;

[0025] Figure 2 This is a circuit diagram of a power on / off circuit according to another embodiment of the present invention. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. It will be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some, rather than all, structures related to the present application are shown in the accompanying drawings. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0027] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0028] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the described features. In the description of this application, "plurality" means two or more, unless otherwise specifically specified.

[0029] In this specification, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0030] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, electrical connections, or mutual communication; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0031] like Figure 1 As shown, this embodiment provides a power on / off circuit, including a control unit, the control unit including a power supply terminal, a detection terminal, and a control terminal, the power on / off circuit further including:

[0032] a first switch unit, wherein a first connection end of the first switch unit is electrically connected to the power output end, and a second connection end of the first switch unit is electrically connected to the power end;

[0033] a voltage dividing unit, wherein a first end of the voltage dividing unit is electrically connected to the power output end, and a voltage dividing end of the voltage dividing unit is electrically connected to the controlled end of the first switch unit;

[0034] a second switch unit, wherein a first connection end of the second switch unit is electrically connected to the second end of the voltage dividing unit, a second connection end of the second switch unit is grounded, and a controlled end of the second switch unit is electrically connected to the control end;

[0035] a first diode, wherein an anode of the first diode is electrically connected to the second end of the voltage dividing unit;

[0036] a second diode, wherein an anode of the second diode is electrically connected to the detection end, and the detection end is electrically connected to the second connection end of the first switch unit;

[0037] A key unit, wherein a first end of the key unit is electrically connected to the cathode of the first diode and the cathode of the second diode, and a second end of the key unit is grounded.

[0038] By providing a first switch unit and a second switch unit, when the device is in the off state, after the key unit is pressed, the power output end, the voltage divider unit, the first diode, and the key unit form a path, so that the voltage divider end of the voltage divider unit can drive the controlled end of the first switch unit, so that the first connection end and the second connection end of the first switch unit are connected, thereby causing the control unit to be powered, and the control unit can control the first connection end and the second connection end of the second switch unit to be connected through the control end. Therefore, the power output end, the voltage divider unit, and the second switch unit form a path, and after the key unit is popped up, it does not affect the voltage divider end of the voltage divider unit driving the controlled end of the first switch unit; when the device is in the on state, after the key unit is pressed, the power output end, the first switch unit, the second diode, and the key unit form a path. Because the detection end can detect the change in voltage before and after the key unit is pressed, the control unit can control the first connection end and the second connection end of the second switch unit to be disconnected based on this. After the key unit is popped up, the first switch unit is turned off, achieving the complete disconnection of the power output end of the energy storage battery and the device load when the device is shut down. Therefore, the utility model provides a hardware architecture that helps to completely power off the energy storage battery when the system is shut down.

[0039] For example, Figure 2As shown, the first switch unit may be a first MOS transistor Q1. The drain of the first MOS transistor Q1 is electrically connected to the power output terminal, the source of the first MOS transistor Q1 is electrically connected to the power terminal, and the gate of the first MOS transistor Q1 is electrically connected to the voltage dividing terminal of the voltage dividing unit. When the voltage dividing unit is turned on, that is, there is a certain voltage at the voltage dividing terminal to turn on the first MOS transistor Q1, and when the voltage dividing unit is turned off, that is, there is no voltage at the voltage dividing terminal, the first MOS transistor Q1 is turned off.

[0040] Preferably, if Figure 1-2 As shown, the voltage dividing unit includes at least a first resistor R1 and a second resistor R2, the first end of the first resistor R1 is electrically connected to the power supply output end, the second end of the first resistor R1 and the first end of the second resistor R2 are electrically connected to the controlled end of the first switch unit, and the second end of the second resistor R2 is electrically connected to the first connection end of the second switch unit.

[0041] Specifically, when the voltage dividing unit is turned on, the voltage dividing end of the voltage dividing unit between the first resistor R1 and the second resistor R2 is energized, thereby turning on the first switch unit.

[0042] Preferably, the second switching unit includes a second diode Q2 and a third resistor R3, the collector of the second diode Q2 is electrically connected to the second end of the voltage divider unit, the base of the second diode Q2 is electrically connected to the first end of the third resistor R3, the second end of the third resistor R3 is electrically connected to the control end, and the emitter of the second diode Q2 is grounded.

[0043] Specifically, the control end can further drive the second diode Q2 to amplify and turn on through the current limiting of the third resistor R3, and can also drive the second diode Q2 to be cut off. For example, when the control end outputs a high level, the second diode Q2 is turned on, and when the control end outputs a low level, the second diode Q2 is cut off.

[0044] Preferably, the second switch unit further includes a fourth resistor R4, a first end of the fourth resistor R4 being electrically connected to the base of the second diode Q2 and the first end of the third resistor R3, and a second end of the fourth resistor R4 being grounded. The fourth resistor acts as a voltage protection for the second diode Q2.

[0045] Preferably, the circuit further comprises a voltage transformation unit, an input end of the voltage transformation unit is electrically connected to the second connection end of the first switch unit, and an output end of the voltage transformation unit is electrically connected to the power supply end.

[0046] Exemplarily, the transformer unit is a DC-to-DC step-down circuit, and the DC voltage at the output end of the power supply can be reduced to a DC voltage that meets the requirements for the operation of the control unit through the transformer unit.

[0047] Preferably, the circuit further includes a constant voltage unit, which includes a sixth resistor R6 and a constant voltage chip U1, the first end of the sixth resistor is electrically connected to the output end of the voltage transformation unit, the second end of the sixth resistor is electrically connected to the input end of the constant voltage chip U1, and the output end of the constant voltage chip U1 is electrically connected to the power supply end.

[0048] Preferably, the constant voltage unit further includes a first capacitor C1, a first end of the first capacitor C1 being electrically connected to the first end of the sixth resistor and the output end of the voltage transformation unit, and a second end of the first capacitor C1 being grounded. The first capacitor C1 has the function of isolating the AC voltage.

[0049] Preferably, the constant voltage unit further includes a third capacitor C3, a first end of the third capacitor C3 is electrically connected to the output end of the constant voltage chip U1 and the power end, and a second end of the third capacitor C3 is grounded.

[0050] Preferably, the circuit further includes a pull-up resistor R5, a first end of the pull-up resistor R5 is electrically connected to the power supply end and the second connection end of the first switch unit, and a second end of the pull-up resistor R5 is electrically connected to the detection end and the anode of the second diode.

[0051] This embodiment further provides an energy storage device, including an energy storage battery and a switching circuit as described in any of the above embodiments.

[0052] The energy storage device provided in this embodiment is provided with a first switch unit and a second switch unit. When the device is in the off state, after the button unit is pressed, the power output end, the voltage divider unit, the first diode and the button unit form a path, so that the voltage divider end of the voltage divider unit can drive the controlled end of the first switch unit to connect the first connection end and the second connection end of the first switch unit, thereby causing the control unit to be powered, and the control unit can control the first connection end and the second connection end of the second switch unit to be connected through the control end. Therefore, the power output end, the voltage divider unit and the second switch unit form a path, and after the button unit is popped up, it does not affect the voltage divider end of the voltage divider unit driving the controlled end of the first switch unit; when the device is in the on state, after the button unit is pressed, the power output end, the first switch unit, the second diode and the button unit form a path. Since the detection end can detect the change in voltage before and after the button unit is pressed, the control unit can control the first connection end and the second connection end of the second switch unit to be disconnected based on this through the control end. After the button unit is popped up, the first switch unit is cut off, so that the power output end of the energy storage battery and the device load are completely disconnected when the device is shut down.

[0053] It should be noted that terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or vertical, but rather that they may be slightly tilted. Terms such as "parallel" and "perpendicular" do not imply that components are absolutely parallel or perpendicular to each other, but rather that a certain angle deviation may be formed. For example, "horizontal" simply means that its direction is more horizontal than "vertical" and does not mean that the structure must be completely horizontal, but rather that it may be slightly tilted. Furthermore, terms such as "center," "longitudinal," "transverse," "length," "width," "thickness," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," "clockwise," and "counterclockwise" indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships typically used when the products of this application are used. These terms are used solely to facilitate the description of the embodiments of this application and to simplify the description, and do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0054] It is understood that the meaning of "plurality" herein is at least two, such as two, three, etc., unless there is a special limitation. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units that are inherent to these processes, methods, products or devices. The term "and / or" is merely a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the related objects before and after are in an "or" relationship.

[0055] The above description is only an implementation method of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A power on / off circuit, comprising a control unit, wherein the control unit comprises a power supply terminal, a detection terminal, and a control terminal, wherein: The switch circuit further includes: a first switch unit, wherein a first connection end of the first switch unit is electrically connected to the power output end, and a second connection end of the first switch unit is electrically connected to the power end; a voltage dividing unit, wherein a first end of the voltage dividing unit is electrically connected to the power output end, and a voltage dividing end of the voltage dividing unit is electrically connected to the controlled end of the first switch unit; a second switch unit, wherein a first connection end of the second switch unit is electrically connected to the second end of the voltage dividing unit, a second connection end of the second switch unit is grounded, and a controlled end of the second switch unit is electrically connected to the control end; a first diode, wherein an anode of the first diode is electrically connected to the second end of the voltage dividing unit; a second diode, wherein an anode of the second diode is electrically connected to the detection end, and the detection end is electrically connected to the second connection end of the first switch unit; A key unit, wherein a first end of the key unit is electrically connected to the cathode of the first diode and the cathode of the second diode, and a second end of the key unit is grounded.

2. The power on / off circuit according to claim 1, wherein: The voltage dividing unit includes at least a first resistor R1 and a second resistor R2, the first end of the first resistor R1 is electrically connected to the power supply output end, the second end of the first resistor R1 and the first end of the second resistor R2 are electrically connected to the controlled end of the first switching unit, and the second end of the second resistor R2 is electrically connected to the first connection end of the second switching unit.

3. The power on / off circuit according to claim 1, wherein: The second switching unit includes a second diode Q2 and a third resistor R3, the collector of the second diode Q2 is electrically connected to the second end of the voltage divider unit, the base of the second diode Q2 is electrically connected to the first end of the third resistor R3, the second end of the third resistor R3 is electrically connected to the control end, and the emitter of the second diode Q2 is grounded.

4. The power on / off circuit according to claim 3, wherein: The second switch unit further includes a fourth resistor R4 , a first end of the fourth resistor R4 is electrically connected to the base of the second diode Q2 and the first end of the third resistor R3 , and a second end of the fourth resistor R4 is grounded.

5. The power on / off circuit according to claim 1, wherein: The circuit further includes a voltage transformation unit, wherein an input end of the voltage transformation unit is electrically connected to the second connection end of the first switch unit, and an output end of the voltage transformation unit is electrically connected to the power supply end.

6. The power on / off circuit according to claim 5, characterized in that: The circuit also includes a constant voltage unit, which includes a sixth resistor R6 and a constant voltage chip U1. The first end of the sixth resistor is electrically connected to the output end of the voltage transformation unit, the second end of the sixth resistor is electrically connected to the input end of the constant voltage chip U1, and the output end of the constant voltage chip U1 is electrically connected to the power supply end.

7. The power on / off circuit according to claim 6, characterized in that: The constant voltage unit further includes a first capacitor C1 , a first end of the first capacitor C1 is electrically connected to the first end of the sixth resistor and the output end of the voltage transformation unit, and a second end of the first capacitor C1 is grounded.

8. The power on / off circuit according to claim 6, characterized in that: The constant voltage unit further includes a third capacitor C3 , a first end of the third capacitor C3 is electrically connected to the output end of the constant voltage chip U1 and the power end, and a second end of the third capacitor C3 is grounded.

9. The power on / off circuit according to claim 1, wherein: The circuit further includes a pull-up resistor R5 , a first end of which is electrically connected to the power supply end and the second connection end of the first switch unit, and a second end of which is electrically connected to the detection end and the anode of the second diode.

10. An energy storage device, characterized in that: The invention comprises an energy storage battery and a switch circuit as claimed in any one of claims 1 to 9.

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