CN216929991U - Power switch self-locking circuit - Google Patents
Power switch self-locking circuit Download PDFInfo
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- CN216929991U CN216929991U CN202220619259.4U CN202220619259U CN216929991U CN 216929991 U CN216929991 U CN 216929991U CN 202220619259 U CN202220619259 U CN 202220619259U CN 216929991 U CN216929991 U CN 216929991U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The application relates to the technical field of switch circuits, in particular to a power switch self-locking circuit which comprises a battery anode BAT +, and further comprises a switch module, an on-off circuit, a self-locking module, a detection module and a battery management module, wherein the on-off circuit comprises a triode Q1, a triode Q1 is a PNP type triode, an emitter of a triode Q1 is connected to the battery anode BAT +, a collector of the triode Q1 is grounded, and a base of the triode Q1 is connected to the switch module; one end of the switch module is connected to the base level of the triode Q1, and the other end of the switch module is grounded; the battery management module is connected between the collector of the triode Q1 and the ground; the detection module is connected between the switch module and the base electrode of the triode Q1; the self-locking module is connected to the battery management module and outputs a corresponding self-locking signal according to the voltage signal detected by the detection module so as to self-lock the battery management module. This application has the effect of realizing carrying out the switching on and shutting down under lower consumption at the robot power.
Description
Technical Field
The application relates to the technical field of switch circuits, in particular to a power switch self-locking circuit.
Background
At present, along with the development of science and technology, more and more robots have walked in the middle of the life production of everybody, and more enterprises, factories, all used all kinds of robots in the family, have all kinds of instruments, subassemblies on the robot to need the power to supply power, and often be provided with switch circuit on the power in order to control opening, the shutoff of power.
In a switch circuit in the related art, a single-key switch is generally used for switching on and off a power supply, a switch control chip of the circuit is always in a working state, the action of the single-key switch is continuously monitored, and when the single-key switch is triggered, the power-on or power-off state is executed.
However, with such a single-key switch, for some battery-powered devices, such as robots, when the robot is in a shutdown state, the problem of static power consumption still exists, and since the switch control chip is still in a working state when the robot is shutdown, part of the circuits are still in a working state, and the capacity of part of the batteries is inevitably consumed.
SUMMERY OF THE UTILITY MODEL
In order to realize carrying out the switching on and shutting down under lower consumption at the robot power, this application provides a switch self-locking circuit.
The application provides a power switch self-locking circuit adopts following technical scheme:
a power switch self-locking circuit comprises a battery anode BAT +, a switch module, an on-off circuit, a self-locking module, a detection module and a battery management module, wherein,
the on-off circuit comprises a triode Q1, the triode Q1 is a PNP type triode, an emitter of the triode Q1 is connected to the battery anode BAT +, a collector of the triode Q1 is grounded, and a base of the triode Q1 is connected to the switch module;
one end of the switch module is connected to the base level of the triode Q1, and the other end of the switch module is grounded;
the battery management module is connected between the collector of the triode Q1 and the ground;
the detection module is connected between the switch module and the base of the triode Q1 and is used for detecting a voltage signal;
the self-locking module is connected to the battery management module and outputs a corresponding self-locking signal according to the voltage signal detected by the detection module so as to self-lock the battery management module.
By adopting the technical scheme, when the power-on device is started, an operator switches on the switch module, the battery anode BAT + supplies power to the emitter of the triode Q1, the voltage of the emitter of the triode Q1 reaches the starting voltage, the triode Q1 is conducted in a saturated mode, the triode Q1 is conducted, the battery management module is conducted to start working after being powered on, the detection module detects the voltage change and sends a voltage signal to the self-locking module, the self-locking module receives the voltage signal and then outputs a self-locking signal to the battery management module, the battery management module keeps the working state after receiving the self-locking signal, the power-on and self-locking are realized, when the power-off device is required, the operator switches on the switch module again, the detection module detects the voltage change again, the voltage signal is sent to the self-locking module, the self-locking module receives the voltage change and then outputs a corresponding self-locking signal to the battery management module, the collector voltage of the triode Q1 rises, the triode Q1 is cut off, the battery management module is turned off when the battery management module is not electrified, the battery management module receives a self-locking signal to keep a shutdown state, the method realizes the function of startup and shutdown, the self-locking control of the battery management module is realized through the self-locking module, a circuit is disconnected after shutdown, and a rear-stage circuit is completely powered off, so that the zero power consumption of shutdown is realized, and the power supply of the robot is turned on and off under lower power consumption.
Preferably, the switch module includes a POWER switch POWER _ KEY, one end of the POWER switch POWER _ KEY is connected to the base of the transistor Q1, and the other end of the POWER switch POWER _ KEY is grounded.
By adopting the technical scheme, the POWER switch POWER _ KEY is used for the on-off operation of an operator.
Preferably, the detection module includes a first diode D1 and a voltage detection port POWER _ DET, the anode of the first diode D1 is connected to the voltage detection port POWER _ DET, the cathode of the first diode D1 is connected between the POWER switch POWER _ KEY and the base of the transistor Q1, and the voltage detection port POWER _ DET is used for detecting voltage.
By adopting the technical scheme, the voltage detection port POWER _ DET is used for detecting the voltage change on the loop, and the first diode D1 has one-way conductivity, so that the voltage detection port POWER _ DET is prevented from being broken down due to current backflow.
Preferably, the self-locking module includes a second diode D2 and an IO port IO _ EN _ POWER, the IO port IO _ EN _ POWER is configured to output a self-locking signal, an anode of the second diode D2 is connected to the IO port IO _ EN _ POWER, and a cathode of the second diode D2 is connected to the battery management module.
Through adopting above-mentioned technical scheme, IO port IO _ EN _ POWER is used for outputting corresponding auto-lock signal to battery management module according to the voltage signal that voltage detection port POWER _ DET detected, and the auto-lock signal is the level signal, and second diode D2 has the singleton conductivity, prevents that current refluence from leading to IO port IO _ EN _ POWER to be punctured.
Preferably, the battery management module includes an enable terminal EN connected to a common point between a collector of the transistor Q1, a ground and the IO port IO _ EN _ POWER, and configured to receive the self-locking signal.
By adopting the technical scheme, the enabling end receives a self-locking signal sent by a self-locking signal IO _ EN _ POWER sent by an IO port, and when the self-locking signal is at a high level, the enabling end receives a high-level signal, and the battery management module is electrified to start working; when the self-locking signal is in a low level, the enabling end receives the low level signal, stops working and is in a shutdown state.
Preferably, the on-off circuit comprises a first resistor R1, one end of the first resistor R1 is connected to the collector of the transistor Q1, and the other end is grounded.
By adopting the technical scheme, the first resistor R1 is a load resistor and is used for providing a load.
Preferably, the on-off circuit further includes a second resistor R2, one end of the second resistor R2 is connected to the emitter of the transistor Q1, and the other end of the second resistor R2 is connected to the base of the transistor Q1.
By adopting the technical scheme, the second resistor R2 is a bias resistor, and the bias resistor is used for ensuring the reliable on-off of the triode Q1.
Preferably, the battery further includes a third resistor R3 and a first capacitor C1, one end of the third resistor R3 is connected to the battery anode BAT +, the other end is connected to ground, and the first capacitor C1 is connected in parallel to the third resistor R3.
By adopting the technical scheme, the third resistor R3 and the first capacitor C1 are used for voltage division.
Drawings
Fig. 1 is an overall circuit connection diagram of an embodiment of the present application.
Description of reference numerals: 1. a switch module; 2. an on-off circuit; 3. a self-locking module; 4. a detection module; 5. and a battery management module.
Detailed Description
The present application is described in further detail below with reference to fig. 1.
The embodiment of the application discloses a power switch self-locking circuit.
As shown in fig. 1, a power switch self-locking circuit includes a battery positive electrode BAT +, a switch module 1, an on-off circuit 2, a self-locking module 3, a detection module 4, and a battery management module 5.
The on-off circuit 2 includes a transistor Q1, the transistor Q1 is a PNP transistor in this embodiment, an emitter of the transistor Q1 is connected to the battery positive electrode BAT + to receive the supply voltage of the battery positive electrode BAT +, a collector of the transistor Q1 is grounded, and a base of the transistor Q1 is connected to the switch module 1.
The on-off circuit 2 further comprises a first resistor R1 and a second resistor R2. One end of the first resistor R1 is connected to the collector of the transistor Q1, and the other end of the first resistor R1 is connected to ground. One end of the second resistor R2 is connected to the emitter of the transistor Q1, and the other end of the second resistor R2 is connected to the base of the transistor Q1.
The first resistor R1 is a load resistor, which is used to make the collector voltage of the transistor Q1 change with the change of the emitter current, and the load resistor is used to limit the current, so as to prevent the transistor Q1 from being burned out. The first resistor R1 has a resistance of 30K omega.
The second resistor R2 is a pull-up bias resistor, and is used to clamp the uncertain signal of the transistor Q1 at a high level when the transistor Q1 is in a reliable off and on state, and also plays a role in limiting current. The second resistor R2 has a value of 200K.
When the transistor Q1 is on, the voltage at the emitter of the transistor Q1 is greater than the voltage at the base of the transistor Q3832 is greater than the voltage at the collector of the transistor Q1, and the base of the transistor Q1 is low.
If the base voltage is greater than the emitter voltage, transistor Q1 is turned off.
In normal conditions, the base of transistor Q1 is at high level and transistor Q1 is turned off.
One end of the switch module 1 is connected to the base of the transistor Q1, and the other end passes through the first resistor R1 and is grounded.
As shown in fig. 1, the switch module 1 includes a POWER switch POWER _ KEY, one end of the POWER switch POWER _ KEY is connected to the base of the transistor Q1, and the other end is grounded through a first resistor R1. The POWER switch POWER _ KEY can be selected from a physical switch, a KEY switch, a touch switch and the like in the embodiment, and only the effect in the application needs to be satisfied.
The detection module 4 comprises a first diode D1 and a voltage detection port POWER _ DET, wherein the anode of the first diode D1 is connected to the voltage detection port POWER _ DET, the cathode of the first diode D1 is connected between the POWER switch POWER _ KEY and the base of the transistor Q1, and the voltage detection port POWER _ DET is used for detecting a voltage value.
The self-locking module 3 comprises a second diode D2 and an IO port IO _ EN _ POWER, the IO port IO _ EN _ POWER is used for outputting a self-locking signal, the anode of the second diode D2 is connected to the IO port IO _ EN _ POWER, and the cathode of the second diode D2 is connected to the battery management module 5.
The voltage detection port POWER _ DET and the IO port IO _ EN _ POWER can be ports on the same single chip microcomputer, and the two ports are connected through electric signals. When the voltage detection port POWER _ DET detects different voltages, different detection signals are output to the single chip microcomputer, when the IO port IO _ EN _ POWER receives the detection signals, corresponding self-locking signals are output, and the self-locking signals are high-level or low-level signals.
As shown in fig. 1, the battery management module 5 is connected between the collector of the transistor Q1 and ground, and the battery management module 5 is used for managing and controlling a battery that supplies power to each component in the robot. In this embodiment, the battery management module 5 is a synchronous buck controller with model LM 5145. The LM5145 synchronous buck controller is intended to regulate the voltage of a high input voltage source or input power rail where high voltage transients can occur. The need for external surge suppression elements may be minimized. A high side switch minimum on time of 40ns helps to achieve a large buck ratio. This feature enables direct buck conversion from the 48V rated input to the low voltage rail, thereby reducing system complexity and solution cost. LM5145 may continue to operate at a duty cycle near 100% during the sudden drop in input voltage to 6V. By virtue of this characteristic, the device is suitable for high performance industrial control, robotics, data communications and radio frequency power amplifier applications.
The battery management module 5 includes an enable terminal EN, that is, the enable terminal EN on the LM5145 controller, and the enable terminal EN is connected to the collector of the transistor Q1, the ground and the IO port IO _ EN _ POWER, and is configured to receive a self-locking signal, and perform on-off self-locking according to different self-locking signals. When the enable terminal EN receives a high level signal, the battery management module 5, that is, the LM5145 in this embodiment, starts to operate, and when the enable terminal EN receives a low level signal, the battery management module 5 cannot operate.
As shown in fig. 1, the power switch self-locking circuit further includes a third resistor R3 and a first capacitor C1, one end of the third resistor R3 is connected to the battery anode BAT +, the other end is grounded, and the first capacitor C1 is connected in parallel to the third resistor R3. The third resistor R3 and the first capacitor C1 are used for voltage division. The third resistor R3 has a resistance of 200K, and the first capacitor C1 has a capacitance of 100 nF/50V.
To further explain the embodiment, when the computer needs to be turned on, the operator presses the POWER switch POWER _ KEY, the battery anode BAT + supplies POWER to the emitter of the transistor Q1, the voltage of the emitter of the transistor Q1 reaches the turn-on voltage, the transistor Q1 is saturated and conducted, after the transistor Q1 is conducted, the current flows from the emitter to the collector to the battery management module 5, the battery management module 5 is powered on to start working, and after the triode Q1 is turned on, the base of the triode Q1 becomes a low level, the voltage detection port POWER _ DET detects that the base of the triode Q1 changes from an original high level to a low level, the voltage detection port POWER _ DET outputs a corresponding detection signal to the IO port IO _ EN _ POWER, the IO port IO _ EN _ POWER receives the detection signal and then outputs a high level signal to the enable terminal EN on the battery management module 5, and the enable terminal EN receives a high level signal to perform self-locking.
When the device needs to be shut down, an operator presses a POWER switch POWER _ KEY, the voltage of an emitter of the triode Q1 is larger than the voltage of the emitter, the triode Q1 is cut off, the battery management module 5 cannot be powered to stop working, the voltage detection port POWER _ DET detects that the base electrode returns to the high level again from the low level, a corresponding detection signal is output to the IO port IO _ EN _ POWER, the IO port IO _ EN _ POWER receives the detection signal and then outputs a low level signal to the enable end EN of the battery management module 5, and the enable end EN receives the low level signal to perform self-locking in the shutdown state.
By the method, the function of starting and shutting down is realized, the self-locking control of the battery management module 5 is realized through the self-locking module 3, the circuit is disconnected after the power is turned off, and the rear-stage circuit is completely powered off, so that the zero power consumption of the power supply of the robot is realized, and the power supply of the robot is started and shut down under the condition of lower power consumption.
The implementation principle is as follows:
as shown in fig. 1, when the device is turned on, an operator turns on the switch module 1, the battery anode BAT + supplies power to the emitter of the transistor Q1, the voltage of the emitter of the transistor Q1 reaches the turn-on voltage, so that the transistor Q1 is saturated and conducted, the transistor Q1 is conducted, so that the battery management module 5 is powered on and starts to work, the detection module 4 detects the voltage change and sends a voltage signal to the self-locking module 3, the self-locking module 3 receives the voltage signal and then outputs a self-locking signal to the battery management module 5, the battery management module 5 receives the self-locking signal and then maintains the working state, thereby realizing the turning on and self-locking, when the device needs to be turned off, the operator turns on the switch module 1 again, the detection module 4 detects the voltage change again, and then sends the voltage signal to the self-locking module 3, the self-locking module 3 receives the voltage change and then outputs a corresponding self-locking signal to the battery management module 5, the collector voltage of the triode Q1 rises, the triode Q1 is cut off, the battery management module 5 is turned off when not powered, the battery management module 5 receives a self-locking signal to keep a shutdown state, the method realizes the function of startup and shutdown, the self-locking control of the battery management module 5 is realized through the self-locking module 3, a circuit is disconnected after shutdown, a rear-stage circuit is completely powered off, the zero power consumption of shutdown is realized, and the power supply of the robot is turned on and off under lower power consumption.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The utility model provides a switch self-locking circuit, includes battery positive pole (BAT +), its characterized in that: also comprises a switch module (1), an on-off circuit (2), a self-locking module (3), a detection module (4) and a battery management module (5), wherein,
the on-off circuit (2) comprises a triode (Q1), the triode (Q1) is a PNP type triode, an emitter of the triode (Q1) is connected with the positive electrode (BAT +) of the battery, a collector of the triode (Q1) is grounded, and a base of the triode (Q1) is connected with the switch module (1);
one end of the switch module (1) is connected to the base level of the triode (Q1), the other end of the switch module is grounded, and the switch module (1) is used for controlling the on-off of a circuit;
the battery management module is connected between the collector of the triode (Q1) and the ground, and the battery management module (5) is used for managing and controlling the battery;
the detection module (4) is connected between the switch module (1) and the base electrode of the triode (Q1) and is used for detecting a voltage signal;
the self-locking module (3) is connected to the battery management module (5), and the self-locking module (3) outputs a corresponding self-locking signal according to the voltage signal detected by the detection module (4) so as to self-lock the battery management module (5).
2. The power switch self-locking circuit according to claim 1, wherein: the switch module (1) comprises a POWER switch (POWER _ KEY), one end of the POWER switch (POWER _ KEY) is connected to the base electrode of the triode (Q1), and the other end of the POWER switch (POWER _ KEY) is grounded.
3. The power switch self-locking circuit according to claim 2, wherein: the detection module (4) comprises a first diode (D1) and a voltage detection port (POWER _ DET), wherein the anode of the first diode (D1) is connected with the voltage detection port (POWER _ DET), the cathode of the first diode (D1) is connected between the POWER switch (POWER _ KEY) and the base of the triode (Q1), and the voltage detection port (POWER _ DET) is used for detecting voltage.
4. A power switch latch circuit according to claim 3, wherein: the self-locking module (3) comprises a second diode (D2) and an IO port (IO _ EN _ POWER), the IO port (IO _ EN _ POWER) is used for outputting a self-locking signal, the anode of the second diode (D2) is connected to the IO port (IO _ EN _ POWER), and the cathode of the second diode (D2) is connected to the battery management module (5).
5. A power switch self-locking circuit according to claim 4, characterized in that: the battery management module (5) comprises an enable terminal (EN) connected to a common point between the collector of the transistor (Q1), ground and the IO port (IO _ EN _ POWER) for receiving the auto-lock signal.
6. A power switch self-locking circuit according to claim 5, characterized in that: the on-off circuit (2) comprises a first resistor (R1), one end of the first resistor (R1) is connected to the collector of the triode (Q1), and the other end of the first resistor (R1) is grounded.
7. The power switch self-locking circuit of claim 6, wherein: the on-off circuit (2) further comprises a second resistor (R2), one end of the second resistor (R2) is connected to the emitter of the triode (Q1), and the other end of the second resistor (R2) is connected to the base of the triode (Q1).
8. A power switch self-locking circuit according to claim 1, characterized in that: the battery further comprises a third resistor (R3) and a first capacitor (C1), one end of the third resistor (R3) is connected to a battery anode (BAT +), the other end of the third resistor (R3) is grounded, and the first capacitor (C1) is connected to the third resistor (R3) in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220619259.4U CN216929991U (en) | 2022-03-19 | 2022-03-19 | Power switch self-locking circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220619259.4U CN216929991U (en) | 2022-03-19 | 2022-03-19 | Power switch self-locking circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216929991U true CN216929991U (en) | 2022-07-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220619259.4U Active CN216929991U (en) | 2022-03-19 | 2022-03-19 | Power switch self-locking circuit |
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| Country | Link |
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| CN (1) | CN216929991U (en) |
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- 2022-03-19 CN CN202220619259.4U patent/CN216929991U/en active Active
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