CN216052689U

CN216052689U - Circuit for detecting power supply access time sequence

Info

Publication number: CN216052689U
Application number: CN202122627606.6U
Authority: CN
Inventors: 王韬; 饶本欢; 向建伟; 曲世超; 乔高松
Original assignee: Jiaxing Lansheng Electronic Technology Co ltd
Current assignee: Jiaxing Lansheng Electronic Technology Co ltd
Priority date: 2021-10-29
Filing date: 2021-10-29
Publication date: 2022-03-15
Anticipated expiration: 2031-10-29

Abstract

The utility model discloses a circuit for detecting a power supply access time sequence, which belongs to the field of use safety of lithium battery electric tools and comprises a battery pack and a power supply interface, wherein the power supply interface is inserted into a power supply output end of the battery pack and is electrically connected with power supply ends of a power supply access detection module and a main loop mechanical switch module respectively; the main loop mechanical switch module is electrically connected with the system power module, the power supply end of the system power module is electrically connected with the logic part module, the power supply is connected into the detection module to detect the voltage of a PACK _ IN port of the logic part module, the logic part module is electrically connected with the action mechanism module, the action mechanism module is electrically connected with the motor, and the problem that when the controller main loop switch is pressed down firstly and then the battery PACK is inserted, the motor can enter a working state at once is solved, so that a safety risk of a user cannot occur is solved.

Description

Circuit for detecting power supply access time sequence

Technical Field

The utility model relates to the technical field of use safety of lithium-ion electric tools, in particular to a circuit for detecting a power supply access time sequence.

Background

As people use lithium battery electric tools more and more, various novel lithium battery electric tools appear on the market, and the principle of the novel lithium battery electric tools is to supply power to a controller by using a lithium battery. At present, a battery pack is used for supplying power to a controller in the market.

However, the sequential relationship between the depression of the controller main loop switch and the insertion of the battery pack may cause a safety risk problem when the user is misused. When the controller main loop switch is pressed down first and then the battery pack is inserted, the motor can immediately enter a working state, and therefore safety risks occur to users.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a circuit for detecting a power supply access time sequence, which solves the problem that when a main loop switch of a controller is pressed down first and then a battery pack is inserted, a motor can immediately enter a working state, so that a safety risk of a user cannot occur.

In order to achieve the purpose, the utility model provides the following technical scheme: a circuit for detecting a power access time sequence comprises a battery pack and a power interface, wherein the power interface is inserted into a power supply output end of the battery pack and is electrically connected with power supply ends of a power access detection module and a main loop mechanical switch module respectively;

the main loop mechanical switch module is electrically connected with the system power module, the power supply end of the system power module is electrically connected with the logic part module, the power supply access detection module detects the voltage of a PACK _ IN port of the logic part module, the logic part module is electrically connected with the action mechanism module, and the action mechanism module is electrically connected with the motor.

Preferably, the main circuit mechanical switch module is a mechanical switch SW1, one end of the mechanical switch SW1 is electrically connected to the B + end of the power interface, and the other end of the mechanical switch SW1 is electrically connected to the system power module.

Preferably, the power access detection module includes a diode D1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, and a capacitor C1, one end of the diode D1 and one end of the resistor R1 are connected together, and one end of the diode D1 and one end of the resistor R1 are electrically connected to the B + end of the power interface.

Preferably, the other end of the diode D1 is connected with one end of a resistor R2, the other end of the resistor R2 is connected with the other end of the resistor R1 and one end of a capacitor C1, the other end of the resistor R1 is electrically connected with one end of a resistor R3, the other end of the resistor R3 and one end of the resistor R4 are connected to a PACK _ IN port IN common, and the other end of the capacitor C1 and the other end of the resistor R4 are both grounded IN common.

Compared with the prior art, the utility model has the beneficial effects that:

the utility model provides a circuit for detecting a power access time sequence, which is characterized IN that a power access detection module and a logic part module are additionally arranged between a system power module and an action mechanism module, so that when the system power module is used for the action mechanism module, the voltage of a PACK _ IN port of the logic part module can be detected through the power access detection module, whether the voltage of the PACK _ IN port is higher than the specified voltage is judged by detecting the voltage of the PACK _ IN port and analyzing and comparing the voltage with the specified voltage, and then a user can select to access a power supply or press a mechanical switch SW1 first, thereby effectively avoiding the safety risk when the user uses the circuit.

Drawings

FIG. 1 is a block diagram of the system of the present invention;

FIG. 2 is a circuit diagram of a power interface of the present invention;

FIG. 3 is a circuit diagram of the power access timing sequence of the detection system of the present invention;

FIG. 4 is an electrical diagram of a power access detection module according to the present invention;

fig. 5 is a system block diagram of the system power module, the main circuit mechanical switch module, the logic portion module, and the action mechanism module of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The utility model provides a circuit for detecting a system power supply access time sequence as shown in figures 1-5, which comprises a battery pack and a power supply interface, wherein the power supply interface is inserted into a power supply output end of the battery pack and can be installed and disassembled through the power supply interface;

the main loop mechanical switch module is electrically connected with the system power module, a controller for controlling power supply voltage is arranged IN the system power module, the voltage of the MCU IN the logic part module can be controlled through the controller, the power supply end of the system power module is electrically connected with the logic part module, the MCU is arranged IN the logic part module, the power supply access detection module detects the voltage of a PACK _ IN port of the logic part module, the logic part module is electrically connected with the action mechanism module, and the action mechanism module is electrically connected with the motor.

The main loop mechanical switch module is a mechanical switch SW1, one end of the mechanical switch SW1 is electrically connected with the B + end of the power interface, so that the battery pack can supply power to the mechanical switch SW1 through the B + end of the power interface, the other end of the mechanical switch SW1 is electrically connected with the system power module, and the on-off of a power module circuit of the system can be controlled by controlling the on-off of the mechanical switch SW 1.

The power access detection module comprises a diode D1, a resistor R1, a resistor R2, a resistor R3, a resistor R4 and a capacitor C1, one ends of a diode D1 and a resistor R1 are connected IN common, one ends of a diode D1 and a resistor R1 are electrically connected with a B + end of the power interface, the other end of the diode D1 is connected with one end of a resistor R2, the other end of the resistor R2 is connected with the other end of a resistor R1 and one end of a capacitor C1 respectively, the other end of the resistor R1 is electrically connected with one end of a resistor R3, the other end of the resistor R3 and one end of a resistor R4 are connected IN common to a PACK _ IN port, and the other ends of a capacitor C1 and the other end of a resistor R4 are both grounded IN common.

When the MCU power supply system is used specifically, a battery pack is inserted into the MCU power supply system through the power interface to supply power to the controller, then the mechanical switch SW1 of the main loop mechanical switch module is actuated, and the mechanical switch SW1 is pressed to enable current of the power interface to enter the controller through the mechanical switch SW1, so that the system power supply module provides working voltage for the MCU.

At this time, the power supply access detection module detects the voltage of the PACK _ IN port, the detected voltage is provided to the MCU through AD conversion of the a/D converter, the logic portion module analyzes and compares the detected voltage of the PACK _ IN port with a predetermined voltage, and when the voltage at the PACK _ IN point is lower than the predetermined voltage, the mechanical switch SW1 is pressed first and then the power supply is connected, the operation mechanism module is not performed, and the motor does not operate.

When the voltage of the PACK _ IN port is higher than a predetermined voltage, the power supply is turned on first, and then the mechanical switch SW1 is pressed, the actuator module is operated, and the motor operates.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A circuit for detecting power access timing sequence comprises a battery pack and a power interface, and is characterized in that: the power supply interface is inserted into the power supply output end of the battery pack and is electrically connected with the power supply ends of the power supply access detection module and the main loop mechanical switch module respectively;

2. A circuit for detecting power on timing as claimed in claim 1, wherein: the main loop mechanical switch module is a mechanical switch SW1, one end of the mechanical switch SW1 is electrically connected with the B + end of the power interface, and the other end of the mechanical switch SW1 is electrically connected with the system power module.

3. A circuit for detecting power on timing as claimed in claim 1, wherein: the power access detection module comprises a diode D1, a resistor R1, a resistor R2, a resistor R3, a resistor R4 and a capacitor C1, one ends of a diode D1 and a resistor R1 are connected in common, and one ends of the diode D1 and the resistor R1 are electrically connected with the B + end of the power interface.

4. A circuit for detecting power on timing as claimed in claim 3, wherein: diode D1's the other end is connected with resistance R2's one end, resistance R2's the other end is connected with resistance R1's the other end and electric capacity C1's one end respectively, resistance R1's the other end and resistance R3's one end electric connection, resistance R3's the other end and resistance R4's one end connect IN PACK _ IN port altogether, electric capacity C1's the other end and resistance R4's the other end are public ground.