Simple one-key starting circuit
Through a simple one-button startup circuit, the start process of electronic locks is simplified by using signal transmission and MCU control, and the problem of multiple peripheral devices and signals being easily disturbed in the prior art is solved, thus realizing the simplicity of battery power and circuitry The stability of the signal achieves low power consumption, small volume, low cost and easy operation.
Patent Information
- Application Number
- CN202420021584.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-04
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-01-04
AI Technical Summary
There are too many peripheral devices of existing electronic lock detection circuits, complex circuit connections and easy interference to circuit signals, resulting in cumbersome and unstable startup process.
A simple one-button start-up circuit is designed, including a switching unit, a signal transmitting unit, a MCU control unit and a battery protection unit. The signal transmitting unit detects the opening state of the switching unit, sends a pull-down signal to the MCU control unit, and controls the front-end analog acquisition. The unit turns on the protection MOS tube, powering the battery into the circuit, simplifying the circuit structure and reducing signal interference.
It realizes the simplicity of battery power and the stability of circuit signal, avoids cumbersome startup operations and circuit interference, and achieves low power consumption, small size, low cost and simplified operation.
Smart Images
Figure CN222147181U_ABST
Abstract
Description
Technical Field
[0001] The embodiments of the present application relate to the field of battery protection technology, and in particular to a simple one-button start circuit. Background Art
[0002] The switch lock of current technology is a traditional mechanical key start, which requires the key to be inserted and twisted to start the machine. To start the machine with the key, it is necessary to find the key, insert the key into the lock hole, turn the key and other tedious operations. In order to solve this problem, electronic locks are used, but the existing electronic lock detection circuit has too many peripheral devices, the line connection is complicated and the circuit signal is easily interfered. Utility Model Content
[0003] The embodiment of the present application provides a simple one-button start circuit to solve the problems of excessive peripheral components in the existing electronic lock detection circuit, complex line connections and circuit signals being easily interfered with.
[0004] In a first aspect, an embodiment of the present application provides a simple one-button start circuit, comprising a switch unit, a signal sending unit, an MCU control unit, a front-end analog acquisition unit and a battery protection unit connected in sequence, wherein the battery protection unit is connected to the positive pole of the battery, the front-end analog acquisition unit is connected to the negative pole of the battery, and the battery protection unit includes a protection MOS tube; the signal sending unit is used to send a pull-down signal to the MCU control unit after detecting that the switch unit is turned on, and after receiving the pull-down signal, the MCU control unit controls the front-end analog acquisition unit to turn on the protection MOS tube to discharge the protection MOS tube.
[0005] In some embodiments, the switching unit includes a first switch, a first diode and a first resistor, the first end of the first resistor is connected to the power supply end, the second end of the first resistor is connected to the positive electrode of the first diode, the negative electrode of the first diode is connected to the first end of the first switch and the signal sending unit, and the second end of the first switch is connected to the ground end.
[0006] In some embodiments, the signal sending unit includes a second resistor and a second diode, the first end of the second resistor is connected to the power supply end, the second end of the second resistor is connected to the positive electrode of the second diode and the MCU control unit, and the negative electrode of the second diode is connected to the switching unit.
[0007] In some embodiments, the signal sending unit further includes a first fuse, a first end of the first fuse is connected to the cathode of the second diode, and a second end of the first fuse is connected to the switch unit.
[0008] In some embodiments, the MCU control unit includes an MCU chip, a first pin and a second pin of the MCU chip are connected to the front-end analog acquisition unit, and a third pin is connected to the second end of the second resistor and the positive electrode of the second diode.
[0009] In some embodiments, the front-end analog acquisition unit includes an analog front-end chip and a fifth resistor, the first pin and the second pin of the analog front-end chip are connected to the external unit, the third pin is connected to the first end of the fifth resistor, the fourth pin is connected to the second end of the fifth resistor and the negative electrode of the battery, the fifth pin and the sixth pin are connected to the MCU control unit, and the seventh pin and the eighth pin are connected to the battery protection unit.
[0010] In some embodiments, the battery protection unit also includes a third resistor and a fourth resistor, the protection MOS tube includes a first MOS tube and a second MOS tube, the gate of the first MOS tube is connected to the first end of the third resistor, the source is connected to the external unit, the drain is connected to the drain of the second MOS tube, the gate of the second MOS tube is connected to the first end of the fourth resistor, the source is connected to the positive electrode of the battery, the second end of the third resistor is connected to the eighth pin of the analog front-end chip, and the second end of the fourth resistor is connected to the seventh pin of the analog front-end chip.
[0011] In some embodiments, the first MOS transistor is an N-type MOS transistor.
[0012] In some embodiments, the second MOS transistor is an N-type MOS transistor.
[0013] In some embodiments, the first MOS transistor and the second MOS transistor are both SI2312DS.
[0014] In the embodiment of the present application, when the switch unit is started, the signal sending unit sends a pull-down signal to the MCU control unit. The MCU control unit receives the pull-down signal and controls the front-end analog acquisition unit to turn on the protection MOS tube, allowing the current to discharge, so that the battery powers the entire circuit. There are fewer peripheral devices, simple circuits, and circuit signals are not easily interfered with. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a circuit structure schematic diagram of a simple one-button start circuit provided in an embodiment of the present application. DETAILED DESCRIPTION
[0016] In order to make the purpose, technical scheme and advantages of the present application clearer, the specific embodiments of the present application are further described in detail below in conjunction with the accompanying drawings. It is 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 the convenience of description, only the part related to the present application but not all the contents are shown in the accompanying drawings. Before discussing the exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flow charts. Although the flow chart describes each operation (or step) as a sequential process, many of the operations therein can be implemented in parallel, concurrently or simultaneously. In addition, the order of each operation can be rearranged. The process can be terminated when its operation is completed, but it can also have additional steps not included in the accompanying drawings. The process can correspond to a method, a function, a procedure, a subroutine, a subprogram, etc.
[0017] The simple one-button start circuit of the embodiment of the present application is provided to avoid the problems of excessive peripheral components in the existing electronic lock detection circuit, complex line connection and circuit signal being easily interfered.
[0018] Figure 1 This is a schematic diagram of the circuit structure of a simple one-button start circuit provided in an embodiment of the present application. Figure 1 The simple one-button start circuit includes a switch unit, a signal sending unit, an MCU control unit, a front-end analog acquisition unit and a battery protection unit connected in sequence, the battery protection unit is connected to the positive electrode P+ / C+ of the battery, the front-end analog acquisition unit is connected to the negative electrode P- / C- of the battery, and the battery protection unit includes a protection MOS tube; the signal sending unit is used to send a pull-down signal to the MCU control unit after detecting that the switch unit is turned on, and after the MCU control unit receives the pull-down signal, it controls the front-end analog acquisition unit to turn on the protection MOS tube to discharge the protection MOS tube.
[0019] As described above, in the embodiment of the present application, when the switch unit is started, the signal sending unit sends a pull-down signal to the MCU control unit. The MCU control unit receives the pull-down signal and controls the front-end analog acquisition unit to turn on the protection MOS tube, allowing the current to discharge, so that the battery powers the entire circuit. There are few peripheral devices, simple circuits, and circuit signals are not easily interfered with. In the embodiment of the present application, it is only necessary to connect the switch unit to the button of instrument A1. When the button of instrument A1 is pressed, the MCU control unit can turn on the protection MOS tube through a detection signal, thereby realizing battery power supply and one-button start of the circuit.
[0020] Among them, the switch unit includes a first switch S1, a first diode D1 and a first resistor R1, the signal sending unit includes a second resistor R2, a second diode D2 and a first fuse F1, the MCU control unit includes an MCU chip U2, the front-end analog acquisition unit includes an analog front-end chip U1 and a fifth resistor R5, the battery protection unit also includes a third resistor R3 and a fourth resistor R4, and the protection MOS tube includes a first MOS tube QC1 and a second MOS tube QD1.
[0021] Specifically, a first end of the first resistor R1 is connected to a power supply end, a second end of the first resistor R1 is connected to an anode of the first diode D1, a cathode of the first diode D1 is connected to a first end of the first switch S1 and a second end of the first fuse F1, and a second end of the first switch S1 is connected to a ground end; a first end of the second resistor R2 is connected to a power supply end, a second end of the second resistor R2 is connected to an anode of the second diode D2 and a third pin of the MCU chip U2, and a cathode of the second diode D2 is connected to a first end of the first fuse F1; a first pin P1 of the MCU chip U2 is connected to a sixth pin P6 of the analog front-end chip U1, a second pin P2 is connected to a fifth pin P5 of the analog front-end chip U1, and a third pin P6 is connected to a 100V AC power supply; a second pin P3 is connected to a 100V AC power supply; and a third pin P4 is connected to a 100V AC power supply. P3 connects the second end of the second resistor R2 and the positive electrode of the second diode D2; the first pin P1 and the second pin P2 of the analog front-end chip U1 are connected to the external unit, the third pin P3 is connected to the first end of the fifth resistor R5, the fourth pin P4 is connected to the second end of the fifth resistor R5 and the negative electrode P- / C- of the battery, the seventh pin DSG_CTRL is connected to the second end of the fourth resistor R4, and the eighth pin CHG_CTRL is connected to the second end of the third resistor R3; the gate of the first MOS tube QC1 is connected to the first end of the third resistor R3, the source is connected to the external unit, the drain is connected to the drain of the second MOS tube QD1, the gate of the second MOS tube QD1 is connected to the first end of the fourth resistor R4, and the source is connected to the positive electrode P+ / C+ of the battery.
[0022] As mentioned above, the embodiment of the present application determines whether the user presses the instrument A1 by detecting the high and low levels of CnctDetc. It is necessary to connect the KEY_ON signal line to the KEY line of the instrument A1. When the instrument A1 does not press the button, CnctDetc will be pulled up by the power supply terminal VCC_MCU through the second resistor R2, and the MCU chip U2 will not act; when the instrument A1 presses the button, CnctDetc will be pulled down through the second diode D2. At this time, the MCU chip U2 detects the signal and turns on the protection MOS tube. Compared with the traditional key, it is more convenient and quick, eliminating the need to find the key, insert the key into the lock hole, and turn the key, achieving the effects of low power consumption, small size, low cost, easy operation, and not easy to be interfered with.
[0023] Specifically, the simple one-button start circuit of the embodiment of the present application can be applied to the protection circuit of a lithium battery, wherein the first MOS tube QC1 and the second MOS tube QD1 are protection MOS tubes in the same-port lithium battery protection circuit, the third resistor R3 and the fourth resistor R4 are MOS drive resistors, the fifth resistor R5 is a current sampling resistor, the first resistor R1 and the second resistor R2 are VCC pull-up resistors, the first diode D1 and the second diode D2 are switching diodes, the first fuse F1 is a self-recovery fuse for protecting the circuit, and the first switch S1 is a button to simulate customer actions; the main protection MOS tube (main discharge MOS) is collaboratively controlled by the front-end analog acquisition unit and the MCU control unit to turn on, and the main discharge MOS is closed under normal circumstances. When discharge is required, it is required to start (i.e., one-button start), and the user presses the button (first switch S1) from the instrument A1, and the MCU receives the CnctDetc pull-down signal, and then turns on the main discharge MOS to allow current discharge.
[0024] As a preferred implementation, both the first MOS transistor QC1 and the second MOS transistor QD1 are N-type MOS transistors.
[0025] As a preferred implementation, the models of the first MOS transistor QC1 and the second MOS transistor QD1 are both SI2312DS.
[0026] The above are only preferred embodiments of the present application and the technical principles used. The present application is not limited to the specific embodiments described herein, and various obvious changes, readjustments and substitutions that can be made by those skilled in the art will not deviate from the scope of protection of the present application. Therefore, although the present application is described in more detail through the above embodiments, the present application is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the claims.
Claims
1. A simple one-button start circuit, characterized in that: It comprises a switch unit, a signal sending unit, an MCU control unit, a front-end analog acquisition unit and a battery protection unit connected in sequence, wherein the battery protection unit is connected to the positive electrode of the battery, the front-end analog acquisition unit is connected to the negative electrode of the battery, and the battery protection unit comprises a protection MOS tube; the signal sending unit is used to send a pull-down signal to the MCU control unit after detecting that the switch unit is turned on, and the MCU control unit controls the front-end analog acquisition unit to turn on the protection MOS tube after receiving the pull-down signal, so that the protection MOS tube discharges.
2. The simple one-button starting circuit according to claim 1 is characterized in that: The switch unit includes a first switch, a first diode and a first resistor, wherein the first end of the first resistor is connected to a power supply end, the second end of the first resistor is connected to an anode of the first diode, the cathode of the first diode is connected to a first end of the first switch and the signal sending unit, and the second end of the first switch is connected to a ground end.
3. The simple one-button starting circuit according to claim 1 is characterized in that: The signal sending unit includes a second resistor and a second diode, the first end of the second resistor is connected to the power supply end, the second end of the second resistor is connected to the anode of the second diode and the MCU control unit, and the cathode of the second diode is connected to the switch unit.
4. The simple one-button starting circuit according to claim 3 is characterized in that: The signal sending unit further includes a first fuse, a first end of the first fuse is connected to the cathode of the second diode, and a second end of the first fuse is connected to the switch unit.
5. The simple one-button starting circuit according to claim 3 is characterized in that: The MCU control unit comprises an MCU chip, a first pin and a second pin of the MCU chip are connected to the front-end analog acquisition unit, and a third pin is connected to the second end of the second resistor and the positive electrode of the second diode.
6. The simple one-button starting circuit according to claim 1, characterized in that: The front-end analog acquisition unit includes an analog front-end chip and a fifth resistor, the first pin and the second pin of the analog front-end chip are connected to the external unit, the third pin is connected to the first end of the fifth resistor, the fourth pin is connected to the second end of the fifth resistor and the negative electrode of the battery, the fifth pin and the sixth pin are connected to the MCU control unit, and the seventh pin and the eighth pin are connected to the battery protection unit.
7. The simple one-button starting circuit according to claim 6, characterized in that: The battery protection unit also includes a third resistor and a fourth resistor, the protection MOS tube includes a first MOS tube and a second MOS tube, the gate of the first MOS tube is connected to the first end of the third resistor, the source is connected to the external unit, and the drain is connected to the drain of the second MOS tube, the gate of the second MOS tube is connected to the first end of the fourth resistor, the source is connected to the positive electrode of the battery, the second end of the third resistor is connected to the eighth pin of the analog front-end chip, and the second end of the fourth resistor is connected to the seventh pin of the analog front-end chip.
8. The simple one-button starting circuit according to claim 7, characterized in that: The first MOS tube is an N-type MOS tube.
9. The simple one-button starting circuit according to claim 7, characterized in that: The second MOS tube is an N-type MOS tube.
10. The simple one-button starting circuit according to claim 7, characterized in that: The models of the first MOS tube and the second MOS tube are both SI 2312DS.