TWI652876B - Charging module for digital torque hand tool - Google Patents

Abstract

The invention provides a charging module for a digital torque hand tool, comprising: an input end for receiving an external power source; a charging power management circuit coupled to the input end for converting the external power source into an input voltage; The rechargeable battery management circuit is coupled to the charging power management circuit for receiving the input voltage and charging a rechargeable battery; a microcontroller coupled to the rechargeable battery; and an output coupled to the micro control Between the device and a digital torque hand tool, the power is supplied by a digital torque hand tool. Therefore, the present invention uses a rechargeable battery to power a digital torque hand tool, and uses an external power source to charge the rechargeable battery, thereby eliminating the environmental problem of using the disposable battery.

Description

Digital Torque Hand Tool Charging Module

The invention relates to a charging module, in particular to a charging module of a digital torque hand tool.

Press, digital torque hand tools usually use a primary battery as a power source and a power source for the display to provide power output and numerical display.

However, the characteristic of the disposable battery is that it cannot be recharged after the battery is exhausted. Therefore, the digital torque hand tool needs to be replaced with a new battery frequently, which is easy to cause environmental problems of the discarded battery, and thus is not environmentally friendly.

In addition, in some types of disposable batteries, such as carbon batteries, the battery capacity is lower, the output voltage is also lower; alkaline manganese batteries may leak corrosive liquid after long-term storage.

Therefore, the conventional digital torsion hand tools still have shortcomings in the power supply mode, and are to be improved by relevant operators.

In order to solve the above problems, the present invention discloses a charging module for a digital torque hand tool, which uses a rechargeable battery to supply power to a digital torque hand tool, thereby eliminating the environmental problem of using a disposable battery.

To achieve the above objective, an embodiment of the present invention provides a charging module for a digital torque hand tool, comprising: an input end for receiving an external power source; and a charging power management circuit coupled to the input end for use To convert an external power source into an input voltage; a rechargeable battery management circuit coupled to the charging power management circuit for receiving an input voltage and charging a rechargeable battery; a microcontroller coupled to the rechargeable battery; An output end is coupled between the microcontroller and a digital torque hand tool to supply power to the digital torque hand tool.

Thereby, the present invention uses the rechargeable battery to power the digital torque hand tool, and uses the external power source to charge the rechargeable battery, thereby eliminating the environmental problem of using the disposable battery.

In addition, when the rechargeable battery management circuit charges the rechargeable battery, it can effectively prevent overcharge, overdischarge, and overcurrent problems to ensure the service life and safety of the rechargeable battery.

The exemplary embodiments of the present invention are described in detail below with reference to the accompanying drawings, and are not intended to limit the technical principles of the invention to the specific disclosed embodiments, and the scope of the invention is limited only by the scope of the claims Equivalent.

Referring to FIG. 1 to FIG. 2 , the charging module of the digital torque hand tool of the present invention is set on a digital torque hand tool to supply power to the digital torque hand tool, so that the digital torque hand tool does not use a disposable battery. Avoid environmental problems with discarded batteries. The digital torque hand tool can be a digital torque wrench, a wireless transmission torque wrench, a digital torque display, an electronic torque wrench, a digital ratchet torque wrench, a digital open torque wrench, a digital movable opening torque wrench or a replaceable head digital torque wrench, etc. . The charging module of the digital torque hand tool of the present invention is powered by a digital torque hand tool and can be used for power supply or electronic display power supply. The charging module of the invention comprises:

An input terminal 10 for receiving an external power source. The input 10 can be connected to an AC, DC power supply or a power supply for inputting an external power supply.

A charging power management circuit 20 is coupled to the input terminal 10 for converting an external power source into an input voltage.

A rechargeable battery management circuit 30 is coupled to the charging power management circuit 20 for receiving an input voltage and charging a rechargeable battery 40. The rechargeable battery management circuit 30 can effectively adjust the input voltage and output a stable voltage to the rechargeable battery 40 for charging to limit the voltage of charging and discharging, so as to facilitate setting the rechargeable battery 40 to be configured with different voltages at the time of shipment. And can prevent overcharging or overdischarging of the rechargeable battery 40. Wherein, the overcharge means that the rechargeable battery 40 exceeds the safe voltage when charging, and the maximum voltage will be exceeded when the overcharge is severe, so that the rechargeable battery 40 has a risk of explosion, and the overdischarge means that the rechargeable battery 40 causes voltage when not charged. When it is too low, there is a possibility of a decrease in life. In addition, the rechargeable battery management circuit 30 may be provided with a short-circuit prevention function to prevent the input voltage from being damaged due to wire breakage or improper configuration of the rechargeable battery 40, and may also cause the rechargeable battery 40 to be at a high temperature of 85 ° C to a low temperature of -40 ° C. The operation between the two ensures normal work in various environments and improves the safety of the rechargeable battery 40.

In the embodiment of the present invention, the rechargeable battery management circuit 30 includes an electrically connected transistor 31, a rechargeable battery protection IC 32, and a linear regulator 33 (LDO). The transistor 31 is an N-channel transistor that effectively manages the current input by the rechargeable battery 40. The rechargeable battery protection IC 32 has a voltage detecting circuit and a delay circuit, and protects the rechargeable battery 40 from overcharging, overdischarging, and overcurrent, and has an automatic repair function and a sleep mode low current consumption. The linear regulator 33 is used to convert the input voltage into a low voltage to charge the rechargeable battery 40 to provide a stable and low noise voltage source. For example, the automatic repair function means that when the rechargeable battery 40 gradually ages, its charging time or power only needs 80% of the original new state, so the rechargeable battery management circuit 30 can automatically adjust the charging time or the amount of power when charging. The charging time or the electric quantity is shortened to 80% of the original time to fully charge the rechargeable battery 40 to avoid the charging time being too long or overcharging, thereby jeopardizing the rechargeable battery 40.

A microcontroller 50 is coupled to the rechargeable battery 40.

An output 60. The system is coupled between the microcontroller 50 and the digital torque hand tool to supply power to the digital torque hand tool.

In addition, the present invention further includes a reset circuit 70 coupled between the charging power management circuit 20 and the microcontroller 50. The reset circuit 70 can be used when the microcontroller 50 is down, and the user may not be able to remove the rechargeable battery 40 to reset the circuit reset to effectively solve the situation in which the microcontroller 50 is down.

Moreover, as shown in FIG. 2, the present invention further includes a status display 80 electrically coupled to the microcontroller 50. The status display 80 is an LED light number display, wherein the status display 80 can be used as one of the charging state detection display, the low voltage state detection display, the power terminal connection display or the power saturation detection display, or any two or more of them. combination. In addition, the status display 80 can also use the voice prompt mode as a prompt for whether the current power is fully charged.

Thereby, the present invention supplies power to the electronic hand tool through the rechargeable battery 40, thereby eliminating the environmental problem of using the disposable battery, and when the rechargeable battery 40 is low in power, the rechargeable battery 40 is charged by the external power source, and the use is quite convenient. .

Further, when the rechargeable battery management circuit 30 charges the rechargeable battery 40, it is possible to effectively prevent overcharge, overdischarge, and overcurrent problems to ensure the service life and safety of the rechargeable battery 40.

While the invention has been described in terms of a preferred embodiment, the various embodiments may The above embodiments are merely illustrative of the invention and are not intended to limit the scope of the invention. All modifications or changes made without departing from the spirit of the invention are within the scope of the invention.

10‧‧‧ input

30‧‧‧Rechargeable battery management circuit

IC32‧‧‧Rechargeable battery protection

33‧‧‧Linear regulator

50‧‧‧Microcontroller

70‧‧‧Reset circuit

20‧‧‧Charging power management circuit

31‧‧‧Optoelectronics

32‧‧‧Linear regulator

40‧‧‧Rechargeable battery

60‧‧‧output

80‧‧‧Status display

FIG. 1 is a block diagram of the present invention. FIG. 2 is a block diagram showing another embodiment of the present invention.

Claims (7)

A charging module for a digital torque hand tool, comprising: an input terminal for receiving an external power source; a charging power management circuit coupled to the input terminal for converting the external power source into an input voltage; The battery management circuit is coupled to the charging power management circuit for receiving the input voltage and charging a rechargeable battery; a microcontroller is coupled to the rechargeable battery; and a reset circuit is coupled to the battery The charging power management circuit is coupled to the microcontroller; and an output is coupled between the microcontroller and a digital torque hand tool to supply power to the digital torque hand tool. The charging module of the digital torque hand tool according to claim 1 further includes a display display electrically connected to the microcontroller. The charging module of the digital torque hand tool according to claim 2, wherein the display device is an LED light number display. The charging module of the digital torque hand tool of claim 1, wherein the rechargeable battery management circuit comprises a rechargeable battery protection IC. The charging module of the digital torque hand tool of claim 4, wherein the rechargeable battery management circuit comprises a transistor electrically connected to the rechargeable battery protection IC. The charging module of the digital torque hand tool of claim 5, wherein the transistor is an N-channel transistor. The charging module of the digital torque hand tool according to claim 4 or 5, wherein the rechargeable battery management circuit comprises a linear voltage regulator electrically connected to the rechargeable battery protection IC for converting the input voltage into a low voltage. Charge the rechargeable battery.