WO2019228519A1 - Electric tool - Google Patents

Electric tool Download PDF

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Publication number
WO2019228519A1
WO2019228519A1 PCT/CN2019/089626 CN2019089626W WO2019228519A1 WO 2019228519 A1 WO2019228519 A1 WO 2019228519A1 CN 2019089626 W CN2019089626 W CN 2019089626W WO 2019228519 A1 WO2019228519 A1 WO 2019228519A1
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WO
WIPO (PCT)
Prior art keywords
energy storage
storage device
power
module
display
Prior art date
Application number
PCT/CN2019/089626
Other languages
French (fr)
Chinese (zh)
Inventor
张宝全
Original Assignee
苏州宝时得电动工具有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 苏州宝时得电动工具有限公司 filed Critical 苏州宝时得电动工具有限公司
Priority to CN201980003060.XA priority Critical patent/CN110856439B/en
Publication of WO2019228519A1 publication Critical patent/WO2019228519A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the invention relates to the field of electric tools, and in particular to an electric tool.
  • an object of the present invention is to provide a power tool that can automatically display the battery power when the battery is installed in the power tool.
  • An electric tool includes: a motor that obtains electric energy from an energy storage device and rotates; an energy storage device mounting port, and optionally installs an energy storage device to provide the motor with
  • the energy storage device installation port includes a positive terminal and a negative terminal, which are electrically connected to a positive output terminal and a negative output terminal of the energy storage device, respectively; a power supply module, which is electrically connected to the positive terminal, and optionally Conducting or disconnecting the electrical connection between the positive terminal and the step-down module;
  • the step-down module converts the voltage of the energy storage device into a working voltage suitable for the operation of the control module;
  • the control module removes the voltage from the step-down module Obtain the operating voltage and start the work, obtain the power amount information of the energy storage device, and send a control instruction to the display unit according to the power amount information;
  • the display unit receives the control instruction of the control module and displays the power amount of the energy storage device ;
  • the power supply module includes a trigger unit connected between the positive terminal and the negative terminal, and a first electronic device disposed between the positive terminal and the step-down module and controlled by the trigger unit.
  • a switch when the energy storage device is connected to the energy storage device installation port, the trigger unit obtains a voltage from a positive electrode of the energy storage device to generate a first control signal, and the first control signal is output to the The control end of the first electronic switch controls the first electronic switch to be turned on, thereby conducting the electrical connection between the energy storage device and the step-down module.
  • the trigger unit includes a first resistor, a first capacitor, and a second electronic switch connected in series between the positive terminal and the negative terminal, and a control terminal of the second electronic switch is connected to the first
  • the capacitor is electrically connected
  • the input terminal of the second electronic switch is electrically connected to the control terminal of the first electronic switch
  • the output terminal of the second electronic switch is electrically connected to the negative terminal
  • the energy storage device When connected to the energy storage device installation port, the energy storage device charges the first capacitor via the first resistor, the control terminal of the second electronic switch inputs a high level, and the second electronic The switch is closed, thereby generating the first control signal.
  • the power tool further includes a power display button
  • the power display button is provided on the body of the power tool, an input end of the power display button is electrically connected to the positive terminal, and the power display button
  • the output terminal of is electrically connected to the step-down module, the power display button is operatively triggered or released, and the electrical connection between the positive terminal and the step-down module is triggered when the power display button is triggered.
  • the step-down module provides an operating voltage to the control module.
  • the power tool further includes a main switch, the main switch is connected in series between the positive terminal and the motor, and the main switch is operatively in an on or off state.
  • the switch is turned on, the electrical connection between the positive terminal and the step-down module is turned on, and the step-down module provides an operating voltage to the control module.
  • control module sends a hold signal to the power supply module after the work is started, and after receiving the hold signal, the power supply module continues to conduct electricity between the positive terminal and the step-down module. connection.
  • control module records the duration of the power displayed by the display unit.
  • duration reaches a first preset time value and the main switch is not turned on, and the power display button is not triggered, all The control module controls the power supply module to disconnect the electrical connection between the energy storage device and the step-down module, and the display unit stops displaying power.
  • the control module when the duration does not reach the first preset time value and the control module detects that the main switch is switched from off to on, the control module continuously sends a hold signal to the power supply module, And detecting the state of the main switch, when detecting that the main switch is switched from on to off, the control module controls the power supply module to disconnect the power between the positive terminal and the step-down module Sexual connection, the display unit stops displaying power.
  • the control module when the duration does not reach the first preset time value, and the control module detects that the main switch is in an off state, and the control module detects that the power display button is triggered, the The control module continuously sends a hold signal to the power supply module.
  • the control module controls the power supply module to disconnect the electrical connection between the positive terminal and the step-down module, and the display unit stops displaying power.
  • the control module judges whether the energy storage device is in an abnormal state according to the information transmitted by the energy storage device, and when it is determined that the energy storage device is in an abnormal state At that time, the control display unit is switched from the state of displaying the electric quantity to the state of displaying that the energy storage device is abnormal.
  • the energy storage device installation port includes a first energy storage device installation port and a second energy storage device installation port, and the first energy storage device and the second energy storage device may be selectively installed, respectively, and the first energy The storage device mounting port is connected in series with the second energy storage device mounting port.
  • the power supply module conducts electrical connection between the energy storage device and the step-down module.
  • the energy storage device installation port includes a first energy storage device installation port and a second energy storage device installation port, and the first energy storage device and the second energy storage device may be selectively installed, respectively, and the first energy The storage device installation port is connected in parallel with the second energy storage device installation port.
  • the power supply module conducts electrical connection between the energy storage device and the step-down module.
  • control module obtains the power of the first energy storage device and the power of the second energy storage device, and sends a control instruction to the display unit according to the lower power of the two, and the display unit displays the first Lower power in the energy storage device and the second energy storage device.
  • the display unit includes a first display unit and a second display unit, the first display unit displays a power amount of the first energy storage device, and the second display unit displays a power amount of the second energy storage device.
  • the display unit is disposed near the energy storage device mounting port, and in a state where the user installs the energy storage device to the energy storage device mounting port, the display unit faces the user.
  • the present invention is beneficial in that before the tool is used, once the energy storage device is connected to the power tool, the remaining power of the battery is displayed, and the user can know the remaining power of the battery without intentional operation. Further, automatically stopping displaying the power after a period of time avoids unnecessary troubles caused by the user forgetting to check the remaining power of the energy storage device in the tool or forgetting to turn off the power display switch.
  • FIG. 1 is a schematic diagram of a functional module for displaying electric power of an electric tool according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of a circuit structure of a power tool according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a specific solution of the power supply module shown in FIG. 2.
  • FIG. 4 is a schematic structural diagram of a power tool according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a power display unit according to the first embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a power display unit according to a second embodiment of the present invention.
  • FIG. 7 is a schematic diagram of a circuit structure of a power tool according to a second embodiment of the present invention.
  • FIG. 1 is a schematic diagram of a function module for displaying electric power of a power tool according to an embodiment of the present invention.
  • the power tool 10 includes: a battery device 11, a power supply module 12, a main control unit 13, and a display unit 14.
  • the battery device 11 is installed.
  • the power supply module 12 starts to provide driving power to the main control unit 13;
  • the main control unit 13 is electrically connected to the power supply module 12, and after obtaining the driving power, estimates the power information of the battery device based on the detected state information of the battery device;
  • the display unit 14 is electrically connected to the main control unit 13 and starts to display the power of the battery device after receiving the estimated power information of the battery device transmitted by the main control unit 13.
  • the main unit The control unit 13 controls the display unit 14 to stop displaying power.
  • the main control unit 13 detects the state information of the battery device 11 and estimates the power of the battery device based on the detected voltage information.
  • the display unit 14 is electrically connected to the main control unit and receives the main control unit. After transmitting the estimated power information, the power of the battery device is displayed. When the time for displaying the power reaches the first preset time value, the main control unit controls the display unit to stop displaying the power.
  • the main control unit estimates its power according to the voltage of the battery device that is sampled electrically.
  • the voltage of the battery device is sampled by the sampling power sampling circuit, and the sampled signal is converted into a signal that can be read by the main control unit and transmitted to the power detection port of the main control unit.
  • a BMS module also referred to as a control board
  • the main control unit estimates the power of the battery pack according to the status information of the received battery cells and the predetermined electrical connection method of the battery cells.
  • FIG. 2 is a schematic diagram showing a circuit structure of a power tool according to an embodiment of the present invention.
  • the power tool includes the functional module of the embodiment shown in FIG. 1, and further includes: a power display button 15 configured on the body of the power tool and electrically connected to the main control unit 13; a main switch 16 configured The main body of the power tool is electrically connected to the battery device 11. When the main switch 16 is closed, the power tool obtains electric energy from the battery device 11.
  • the power display button 15 is a switch button
  • the main switch 16 is a switch with speed adjustment and on / off functions.
  • the main control unit 13 includes a step-down module 131, an MCU control module 132, a power sampling module 133, and a drive module 134 that controls the power tool.
  • the MCU control module 132 obtains power through the step-down module 131.
  • the MCU control module may be MCU (Microcontroller Unit), single chip microcomputer, and other chips capable of processing instructions, which have multiple I / O ports, are configured to receive / transmit instructions of different functions.
  • the main control unit also has other functions, such as overcurrent module, temperature detection module, undervoltage protection module, etc.
  • the main control unit 13 receives a power display instruction (also referred to as a "signal"), and controls the display unit 14 to perform power display according to a preset power display rule.
  • the power display instruction has different descriptions at different stages.
  • the moment when the battery device 11 is correctly installed in the mounting port of the power tool body is described as the main control unit 13 is powered on; the battery device 11 is correctly installed in the power tool.
  • the main control unit receives the power display command triggered by the power display button 15 or the main switch 16 is closed, and the main control unit 13 receives the power display command in real time (periodically).
  • the main control unit 13 when the battery device 11 is correctly installed in the mounting port of the power tool body, the main control unit 13 obtains driving power through the power supply module 12, and controls the display unit 14 to start displaying power and time it.
  • the main control unit 13 executes the first power display rule corresponding to the power display instruction of the main switch closing 16; when the timing time does not reach the first preset time value, if the main control unit 13 detects the state information of the main switch 16 being opened, the user
  • the main control unit 13 receives the power display instruction triggered by the power display button 15 and the main control unit 13 executes the second power display rule corresponding to the power display instruction triggered by the power display button 15;
  • the tool 10 enters the standby mode.
  • the main control unit 13 controls the power supply module 12 to power off, so that all circuits in the main body of the power tool are disconnected from the battery device. Because the main control unit 13 is powered off, The display unit 14 cannot obtain power, and ends (or stops) the power display of the display unit. In other embodiments, when the tool enters the standby mode, the main control unit 13 controls the display unit 14 to stop displaying power, disconnects the power supply module 12 from the battery device 11 after a delay, and detects the state of the battery device 11 within the delay time. When the battery has an abnormal state, such as over-temperature, over-charge, or over-discharge, the control display unit displays an abnormal state.
  • an abnormal state such as over-temperature, over-charge, or over-discharge
  • the main control unit receives the power display instruction that the main switch 16 is closed or the power display button 15 is triggered, the aforementioned battery device 11 in this embodiment is correctly installed to the power tool. After the installation port of the body, when the timing time does not reach the first threshold, corresponding power display rules under different power display instructions.
  • the first power display rule is: the main control unit 13 controls the display unit 14 to display the power, and detects the state of the main switch 16 in real time.
  • the main control unit 13 Control the power supply module 12 to power off, and the tool enters the standby mode.
  • the second power display rule is as follows: the main control unit 13 controls the display unit 14 to display the power and start timing. During the timing, the state of the power display switch 15 is detected in real time. If the timing does not reach the second preset time value, When the power display switch 15 is triggered, the timing is restarted. When the timing reaches a second preset time value, the main control unit 13 controls the power supply module 12 to power off and the tool enters the standby mode.
  • the standby mode has been described in the above embodiment, and will not be repeated here.
  • FIG. 3 is a schematic diagram of a specific solution of the power supply module in the embodiment shown in FIG. 2.
  • the power supply module 12 includes a resistor, a capacitor, a rectifier diode, a zener diode, and a switch tube.
  • the battery device is mounted to the mounting port of the power tool body. Instantaneously, the capacitor C1 is maintained to be charged through the circuit where R1, R2, C1, D2, and R7 are located.
  • the switch MosA is kept on, and the switch MosB is turned on. Referring to FIG. 2, after MosB is turned on, the battery pack supplies power to the back-end step-down module 131 through MosB, so that the MCU control module 132 is powered on.
  • Power_on immediately sends a square wave signal to maintain MosA on. Thereby, the power supply module 12 can be kept powered all the time, and the main control unit 13 can obtain power.
  • Power_on outputs a low level
  • MosA is turned off
  • the power supply module 12 cannot supply power to the back-end step-down module 131, and all internal circuits of the power tool 10 are powered off.
  • the step-down module 131 directly receives power from the battery device 11 without passing through the power supply module, so that the MCU control module 132 is powered on, and once the MCU control module 132 is powered on, Power_on sends The square wave signal keeps the MosA on, so that the power supply module 12 can be kept powered; the MCU control unit 132 remains powered after the power display button 15 is released.
  • the main switch 16 is closed, and the step-down module 131 directly receives power from the battery device 11 without passing through the power supply module, so that the MCU control module 132 is powered on.
  • Power_on immediately sends a square wave signal to maintain MosA is turned on; when the main switch 16 is turned off, the MSW_DETECT port of the MCU control module 132 receives a signal that the main switch 16 is turned off. Power_on outputs a low level. MosA is turned off. All electrical circuits inside the power tool are de-energized.
  • the battery device 11 is a plurality of battery packs 110 (each battery pack contains a plurality of battery chips, which are electrically connected according to certain rules.
  • the MAX voltage of each battery pack can be 12V (connection type: such as 3S1P , 3S2P, etc.), 16V, 20V, 24V, etc., the specific application of the visual power tool 10 is not limited here.
  • the battery chip may use a lithium battery, a fuel cell, etc.) to describe the proposed invention
  • the battery pack 110 is plugged into the mounting port of the power tool body.
  • FIG. 4 is a schematic structural diagram of an electric tool according to an embodiment of the present invention.
  • the power tool includes: a power tool body 100; an installation opening 110a configured to match the installation of a battery pack in the power tool body 100; a power supply module disposed inside the power tool body 100; a main control unit (not shown) disposed in The inside of the body of the power tool 100; two battery packs 110, which are pluggable and installed in the corresponding mounting ports 110a, respectively, and provide electrical power to the power tool after being electrically connected; the display unit 120, which is electrically connected to the main control unit; The module is electrically connected to the battery pack to provide power to the main control unit; the main control unit estimates the battery pack power information based on the sampled battery pack 110 state information and transmits it to the display unit; the display unit 140 receives the main control unit The power message is displayed and displayed.
  • the display unit 140 is mounted near the mounting port 110a, and faces the user in a state where the battery pack 110 is mounted on the power tool body. Specifically,
  • the two battery packs 110 are respectively installed at the installation openings of the power tool body 100 (for example, a battery pack in the form of a clip is installed on the body).
  • the battery packs 110 are respectively disposed on both sides of the handle portion area of the power tool body (two battery packs 110 may be disposed on one side).
  • an auxiliary handle may be provided on the power tool body 100 so that the user can use the power tool to perform work.
  • the display unit 140 of the power tool of this embodiment is disposed on the surface of the power tool body (as shown in FIG. 4) near the battery device mounting port 110 a, and may also be disposed on the handle area of the power tool body 100.
  • the main control unit of this embodiment uses a power sampling module to perform voltage sampling on an electrically connected battery pack.
  • the estimation action is the same as above, and will not be repeated here.
  • FIG. 5 is a schematic structural diagram of a display unit of a power tool according to an embodiment of the present invention.
  • the display unit 140 which is electrically connected to the main control unit, includes: a power module 141.
  • the main control unit receives the power display instruction, controls the display unit to respond to the power display instruction, and displays the power according to a power display rule corresponding to the power display instruction.
  • the total power of the battery device is described.
  • the battery device is composed of multiple battery packs connected in series or in parallel.
  • the main control unit of the above embodiment uses the power sampling circuit to sample the voltage of the battery pack that is electrically connected.
  • the power module 141 includes a plurality of LED indicators. It specifically includes multiple LED indicators, which can be preset lighting rules (such as setting the number of indicators to be lit according to the voltage information of the detected battery pack), and the number of LED indicators to reflect the current
  • the total power of the battery device if the battery device is electrically connected in parallel by two battery packs, the total power is displayed as the power corresponding to the battery pack with a low voltage between the two battery packs).
  • the power module 141 includes a combination of three LED indicators (take the battery device's MAX voltage of 20V as an example, if the detected battery device voltage> 20V, the three LEDs are all on; the detected battery device voltage> 18.5 At V, 2 LEDs are lit, and when the detected battery device voltage is> 16V, 1 LED is lit); or other number of LED indicator combinations or other analog display quantity indicators (such as designed as a cylindrical battery, inside Filled shadows indicate power). It is not necessary to list them one by one, as long as the purpose of this solution can be achieved, that is, the user can know the power of the current electrical connection of the battery pack by viewing the power module.
  • the control unit of this embodiment samples the voltage of the battery pack, and the estimation operation is the same as above, and is not repeated here.
  • the total power may be the average power of the two battery packs, or the integrated power after a predetermined algorithm is performed based on the power of the two battery packs.
  • the total amount can be the power corresponding to the low battery packs in the two battery packs, or the average power of the two battery packs, or a preset algorithm based on the power of the two battery packs Integrated power.
  • the display unit may not display the total power, but first display the power of the first battery pack, and then display the power of the second battery pack.
  • the power of different battery packs is displayed in time sharing.
  • the display unit may first display the power of the first battery pack, then display the power of the second battery pack, and finally display the total power. That is, the power and total power of different battery packs are displayed in time sharing.
  • the light indicator in the power module prompts an alarm message (for example, the light flashes; the indicator light displays a striking color, depending on the application) Depending on the occasion).
  • a set threshold for example, 16V
  • FIG. 6 is a schematic structural diagram of a display unit of a power tool according to an embodiment of the present invention.
  • the display unit 140 includes a power module 141 and a power display button 142.
  • the difference from the solution in FIG. 5 is that the power display button is integrated in the display unit 140.
  • the power display button is located on the body of the power tool (not shown), or the power tool does not include a power display button.
  • the control unit uses the power sampling module to sample the voltage of the battery device. The estimation action is the same as above, and is not repeated here.
  • the display unit can also issue alarms, such as: abnormal motor, control board abnormality, abnormal battery pack (such as the voltage of the battery pack is lower than the set threshold) and so on.
  • alarms such as: abnormal motor, control board abnormality, abnormal battery pack (such as the voltage of the battery pack is lower than the set threshold) and so on.
  • the power module included in the display unit of the electric tool of the embodiment shown in FIG. 5 and FIG. 6 is composed of an LED indicator.
  • the display unit may also be a display screen.
  • Module optionally includes a touch switch for power display that functions as a power display button.
  • the power display button is electrically connected to the main control unit.
  • the main control unit receives the power display command triggered by the power display button.
  • the main control unit receives the power display command triggered by the power display button.
  • the trigger can be described as being pressed, or Being pressed effectively
  • the control display unit responds to the signal and the power is displayed.
  • the form of power display button can be mechanical button switch, touch switch, infrared sensor, etc.
  • the user pressing the power display button provided on the power tool body can be understood as pressing the button once, pressing the button and holding the set time (such as 1S, 2S, 3S, etc.), which is not limited here, as long as the display by pressing the power display button can be realized
  • the units may be displayed in response to the action.
  • the power display button is disposed on the surface of the body between the mounting ports. It can also be placed near the handle of the body.
  • the power tool of the method includes a battery installation port, and a battery device is installed at the installation port to provide electric power to the power tool; a power supply module is electrically connected to the battery device; a main control unit is electrically connected to The power supply module obtains driving power from the power supply module, and estimates the power amount information of the battery device according to the detected state information of the battery device; the display unit is electrically connected to the main control unit and receives The estimated power amount information transmitted by the main control unit.
  • the method is characterized in that the method includes: the main control unit 13 obtains driving power from the power supply module 12 when the battery device 11 is installed at the mounting port of the tool body; transmits a power display instruction to the display unit 14; and controls the display unit 14 to respond
  • the power display instruction starts to display the power of the battery device and starts timing; when the timing reaches a first preset time value, the display unit 14 is controlled to stop displaying the power of the battery device.
  • the main control unit after receiving the power display signal, issues a voltage information sampling instruction of the battery pack, and the voltage information of the battery pack sampled by the sampling circuit is fed back to the voltage signal port.
  • the power tool 10 of the method further includes a power display button (not shown), which is disposed on the body of the power tool and is electrically connected to the main control unit.
  • the method includes: the main control unit 13 is configured to display a power display instruction based on the received power display button; transmit a power display instruction to the display unit 14; and control the display unit 14 to start displaying the power of the battery device in response to the power display instruction, When the timing reaches the second preset time value, the control display unit 14 stops displaying the power of the battery device.
  • the power tool 10 of the method further includes a main switch (not shown), which is disposed on the body of the power tool and is electrically connected to the battery device 11.
  • the method includes: the main control unit 13 based on the received electric quantity display instruction of the main switch being closed; transmitting the electric quantity display instruction to the display unit 14; controlling the display unit 14 to start displaying the electric quantity of the battery device in response to the electric quantity display instruction; Switch status information; when the main switch is detected to be off, the control display unit 14 stops displaying the power of the battery device.
  • FIG. 7 is a schematic diagram of a circuit structure of a power tool according to a second embodiment of the present invention.
  • the difference between this embodiment and the first embodiment shown in FIG. 2 is that there is no electrical connection between the power supply module 12 and the power-on port output of the control module 132. That is to say, the power supply module 12 does not need a signal from the power-on port of the control module 132 to maintain its on-state, but maintains its on-state through the setting of its own circuit to achieve the installation of the battery device to the installation port. After that, the electrical connection between the battery device and the step-down module 131 is maintained for a period of time.
  • the power supply module 12 includes a trigger unit connected between the positive terminal B + and the negative terminal B-, and a first electronic switch disposed between the positive terminal B + and the step-down module 131 and controlled by the trigger unit.
  • the trigger unit obtains a voltage from the positive electrode of the battery device to generate a first control signal.
  • the first control signal is output to a control terminal of the first electronic switch, and controls the first electronic switch to be turned on, thereby conducting the electrical connection between the battery device and the step-down module 131.
  • the design of the trigger unit is shown in FIG. 3 and includes a first resistor R1, a first capacitor C1, and a second electronic switch MOSA connected in series between the positive terminal B + and the negative terminal B-.
  • the control terminal of the second electronic switch MOSA is electrically connected to the first capacitor C1 via the diode D2.
  • An input terminal of the second electronic switch MOSA is electrically connected to a control terminal of the first electronic switch MOSB.
  • the output terminal of the second electronic switch MOSA is electrically connected to the negative terminal B-.
  • the battery device When the battery device is connected to the battery device installation port, the battery device charges the first capacitor C1 via the first resistor R1, the control terminal of the second electronic switch MOSA inputs a high level, and the second electronic switch MOSA is closed, thereby generating the first control signal.
  • the capacity of the first capacitor C1 is set to be large, so that it can be used in the battery.
  • the power stored momentarily when the device is installed to the battery device installation port maintains the conduction of the first electronic switch MOSB for a period of time.
  • the second electronic switch MOSA is turned off, and then the first electronic switch MOSB is turned off.
  • the electrical connection between the step-down module 131 and the battery device is broken. 131 no longer provides the operating voltage to the control module 132.
  • the control module 132 stops working, and the display unit 14 is no longer displayed. The entire circuit enters a low power state.
  • the present invention also provides a third power display rule.
  • the control module 132 obtains the operating voltage from the battery device via the voltage step-down module 131, the control module 132 starts work, and the display unit 14 displays the power of the battery device.
  • the second embodiment shown in FIG. 7 there is no electrical connection between the power supply module 12 and the power-on output port of the control module 132.
  • the voltage step-down module 131 and the battery device are disconnected. The connection between the control module 132 no longer obtains the operating voltage, and the display module 14 stops displaying. The entire circuit enters a low power state.
  • the present invention also provides a fourth display rule. Specifically, after the battery device is installed in the installation port of the power tool body, the control module 132 obtains the operating voltage from the battery device via the voltage step-down module 131, the control module 132 starts work, and the display unit 14 displays the power of the battery device. According to the first embodiment shown in FIG. 2, the power-on output port of the control module 132 then outputs a square wave signal to the power supply module 12, and the power supply module 12 continuously turns on the battery device and the step-down module 131 based on the pulse signal. Is electrically connected, the control module 132 continues to work, and the display unit 14 continuously performs power display. The control module 132 records the time when the display unit 14 performs the power display.
  • the control display unit 14 stops displaying and stops the power-on output port from outputting a square wave signal.
  • the power supply module 12 disconnects the battery device and The electrical connection between the step-down modules 131, and the control module 132 no longer obtains the operating voltage. The entire circuit enters a low power state.
  • the present invention also provides a fifth display rule. Specifically, after the battery device is installed in the mounting port of the power tool body, it enters the third rule. Before the power consumption of the power supply module 12 itself is consumed, if the control module 132 detects that the power display button 15 is triggered, it enters a second display rule.
  • the fifth display rule may also be that the battery device enters the fourth display rule after the battery device is installed in the mounting port of the power tool body.
  • the control module 132 records the time when the display unit 14 performs power display. When the first preset time value is not reached, if the control module 132 detects that the power display button 15 is triggered, it enters the second display rule.
  • the invention also provides a sixth display rule. Specifically, after the battery device is installed in the mounting port of the power tool body, it enters the third rule. Before the power consumption of the power supply module 12 itself is consumed, if the control module 132 detects that the main switch 16 is turned on, it enters the first display rule.
  • the sixth display rule may also be that after the battery device is installed in the mounting port of the power tool body, the fourth display rule is entered.
  • the control module 132 records the time when the display unit 14 performs the power display. When the first preset time value is not reached, if the control module 132 detects that the main switch 16 is turned on, it enters the first display rule.
  • the invention also provides a seventh display rule. Specifically, after the battery device is installed in the mounting port of the power tool body, it enters the third rule. Before the power consumption of the power supply module 12 itself is consumed, if the control module 132 detects that the main switch 16 is turned on, it enters the first display rule. After entering the first display rule, if the control module 132 detects that the power display button 15 is triggered and is released before the main switch 16 is turned off, the display is still performed according to the first display rule. After entering the first display rule, if the control module 132 detects that the power display button 15 is triggered and is still triggered after the main switch 16 is turned off, the display is performed according to the second display rule after the main switch 16 is turned off.
  • the sixth display rule may also be that the battery device enters the fourth rule after being installed in the mounting port of the power tool body.
  • the control module 132 records the time when the display unit 14 performs the power display. When the first preset time value is not reached, if the control module 132 detects that the main switch 16 is turned on, it enters the first display rule. After entering the first display rule, if the control module 132 detects that the power display button 15 is triggered and is released before the main switch 16 is turned off, the display is still performed according to the first display rule. After entering the first display rule, if the control module 132 detects that the power display button 15 is triggered and is still triggered after the main switch 16 is turned off, the display is performed according to the second display rule.
  • the present invention also provides an eighth display rule. Specifically, after the battery device is installed in the mounting port of the power tool body, it enters the third rule. Before the power consumption of the power supply module 12 itself is consumed, if the control module 132 detects that the power display button 15 is triggered, it enters a second display rule. After entering the second display rule, if the control module 132 detects that the main switch 16 is turned on and the main switch 16 is turned off before the power display button 15 is released, the display is still performed according to the second display rule. After entering the second display rule, if the control module 132 detects that the main switch 16 is turned on and the main switch 16 is still on after the power display button 15 is released, the display is performed according to the first display rule.
  • the eighth display rule may also be that after the battery device is installed in the mounting port of the power tool body, the fourth rule is entered.
  • the control module 132 records the time when the display unit 14 performs power display. When the first preset time value is not reached, if the control module 132 detects that the power display button 15 is triggered, it enters the second display rule. After entering the second display rule, if the control module 132 detects that the main switch 16 is turned on and the main switch 16 is turned off before the power display button 15 is released, the display is still performed according to the second display rule. After entering the second display rule, if the control module 132 detects that the main switch 16 is turned on and the main switch 16 is still on after the power display button 15 is released, the display is performed according to the first display rule.
  • the battery device 11 may include only one battery pack 110, may also include two battery packs 110, and may also be three or more battery packs 110.
  • B + shown in the circuit of FIG. 2, FIG. 3, and FIG. 7 is the first B + terminal
  • B- is the first B- terminal.
  • a plurality of B + and B- terminals corresponding to the number of battery packs are also provided between the first B + and B-, which are not shown on the circuit. So that the power tool can be electrically connected to each battery pack, and multiple battery packs can be combined in series or in parallel.
  • B + is connected to the positive pole of each battery pack 110
  • B- is connected to each battery pack.
  • the negative connection When any battery pack is connected to the installation port, the power supply module 12 is triggered to conduct the electrical connection between the battery pack and the step-down module 131.
  • the control module 132 starts the operation and controls the display unit 14 to display the power.
  • the battery device 11 includes a plurality of battery packs 110 and the plurality of battery packs 110 are connected in series with each other on the power tool body, as shown in FIG. 2, FIG. 3 and FIG. 7, the first battery pack is connected to B +.
  • the positive electrode of 110, B- is connected to the negative electrode of the last battery pack.
  • the battery pack in the middle position is connected to the power tool, they are connected in series on the power tool, and the positive electrode formed after the series connection is connected to the negative electrode of the first battery pack 110.
  • the negative electrode formed after being connected in series is connected to the positive electrode of the last battery pack.
  • B + is connected to the positive pole of the first battery pack
  • the positive pole of the second battery pack is connected to the negative pole of the first battery pack
  • the negative pole of the second battery pack is connected to B- .
  • B + is connected to the positive pole of the first battery pack
  • the positive pole of the second battery pack is connected to the negative pole of the first battery pack
  • the negative pole of the second battery pack is connected to the third
  • the positive terminal of one battery pack is connected to the negative terminal of B-.
  • all the battery packs are connected to the installation port to trigger the power supply module 12 to conduct the electrical connection between the battery pack and the step-down module 131.
  • the control module 132 starts the work and controls the display unit 14 to display the power.
  • the device installed at the installation port of the power tool and supplying power to the power tool may be other energy storage devices such as a super capacitor in addition to a battery device.
  • the module that controls the motor operation and display unit can also be a control module such as a DSP.

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Abstract

The present invention provides an electric tool, comprising: a motor; an energy storage device mounting port selectively mounting an energy storage device; a power supply module selectively establishing or breaking the electrical connection between a positive terminal and a voltage reduction module; a voltage reduction module converting the voltage of the energy storage device into a working voltage of a control module; a control module obtaining power information of the energy storage device; and a display unit displaying the power of the energy storage device. When the energy storage device is mounted on the energy storage device mounting port, the power supply module establishes the electrical connection between the energy storage device and the voltage reduction module, the control module obtains a working voltage to start working. The present invention has the following beneficial effects: when a battery device is mounted on an electric tool, a user can automatically learn about the remaining power of the battery, without requiring an operation, thereby avoiding unnecessary trouble caused by the user forgetting to check the remaining power of the battery.

Description

一种电动工具Electric tool 技术领域Technical field
本发明涉及电动工具领域，尤其是涉及一种电动工具。The invention relates to the field of electric tools, and in particular to an electric tool.
背景技术Background technique
以往为获得工具所用电池的剩余电量，用户需按压处在电池包或工具主体上的一个固定小面积区域上的电量显示按键，且按压时需要一定的力。为此，工具使用过程中，用户需要一只手抓握工具主体上的把手，一只手按压电量显示按键，给用户的操作带来不便。同时，很多用户在使用工具之前会忘记检查工具，在携带工具外出时导致电池电量低而无法使用的问题。In the past, in order to obtain the remaining power of the battery used by the tool, the user needs to press the power display button on a fixed small area on the battery pack or the tool body, and a certain force is required when pressing. For this reason, during the use of the tool, the user needs to hold the handle on the tool main body with one hand and press the power display button with one hand, which brings inconvenience to the user's operation. At the same time, many users forget to check the tool before using the tool, which causes the problem of low battery power and unusable when carrying the tool out.
发明内容Summary of the Invention
为解决现有技术的不足，本发明的目的在于提供一种电动工具，在电池安装至电动工具时能够自动显示电池电量。In order to solve the shortcomings of the prior art, an object of the present invention is to provide a power tool that can automatically display the battery power when the battery is installed in the power tool.
为实现上述目的，本发明采用如下技术方案：一种电动工具，包括：电机，从能量存储装置获取电能并旋转；能量存储装置安装口，可选择地安装能量存储装置，以给所述电机提供电能，所述能量存储装置安装口包括正极端子和负极端子，分别与所述能量存储装置的正极输出端和负极输出端电性连接；供电模块，与所述正极端子电性连接，可选择地导通或断开所述正极端子与降压模块之间的电性连接；降压模块，将能量存储装置的电压转换为适合于控制模块工作的工作电压；控制模块，从所述降压模块获得工作电压并启动工作，获取所述能量存储装置的电量信息，并根据所述电量信息向显示单元发送控制指令；显示单元，接收所述控制模块的控制指令并显示所述能量存储装置的电量；当所述能量存储装置安装到所述能量存储装置安装口时，响应于所述电池装置的正极输出端和负极输出端分别与所述正极端子和所述负极端子的连接，所述供电模块导通所述能量存储装置与所述降压模块之间的电性连接，所述控制模块获得工作电压并启动工作。In order to achieve the above object, the present invention adopts the following technical solution: An electric tool includes: a motor that obtains electric energy from an energy storage device and rotates; an energy storage device mounting port, and optionally installs an energy storage device to provide the motor with For electrical energy, the energy storage device installation port includes a positive terminal and a negative terminal, which are electrically connected to a positive output terminal and a negative output terminal of the energy storage device, respectively; a power supply module, which is electrically connected to the positive terminal, and optionally Conducting or disconnecting the electrical connection between the positive terminal and the step-down module; the step-down module converts the voltage of the energy storage device into a working voltage suitable for the operation of the control module; the control module removes the voltage from the step-down module Obtain the operating voltage and start the work, obtain the power amount information of the energy storage device, and send a control instruction to the display unit according to the power amount information; the display unit receives the control instruction of the control module and displays the power amount of the energy storage device ; When the energy storage device is mounted to the energy storage device mounting port, in response to The positive output terminal and the negative output terminal of the battery device are respectively connected to the positive terminal and the negative terminal, and the power supply module conducts an electrical connection between the energy storage device and the step-down module. The control module obtains the working voltage and starts working.
可选的，所述供电模块包括连接在所述正极端子和所述负极端子之间的触发单元，以及设置在所述正极端子与降压模块之间且受所述触发单元控制的第一电子开关，当所述能量存储装置配接到所述能量存储装置安装口时，所述触发单元从所述能量存储装置的正极获得电压生成第一控制信号，所述第一控制信号输出给所述第一电子开关的控制端，控制所述第一电子开关导通，从而导通所述能量存储装置与所述降压模块之间的电性连接。Optionally, the power supply module includes a trigger unit connected between the positive terminal and the negative terminal, and a first electronic device disposed between the positive terminal and the step-down module and controlled by the trigger unit. A switch, when the energy storage device is connected to the energy storage device installation port, the trigger unit obtains a voltage from a positive electrode of the energy storage device to generate a first control signal, and the first control signal is output to the The control end of the first electronic switch controls the first electronic switch to be turned on, thereby conducting the electrical connection between the energy storage device and the step-down module.
可选的，所述触发单元包括串联在所述正极端子和所述负极端子之间的第一电阻、第一电容以及第二电子开关，所述第二电子开关的控制端与所述第一电容电性连接，第二电子开关的输入端与所述第一电子开关的控制端电性连接，所述第二电子开关的输出端与所述负极端子电性连接，当所述能量存储装置配接到所述能量存储装置安装口时，所述能量存储装置经所述第一电阻给所述第一电容充电，所述第二电子开关的控制端输入高电平，所述第二电子开关闭合，从而生成所述第一控制信号。Optionally, the trigger unit includes a first resistor, a first capacitor, and a second electronic switch connected in series between the positive terminal and the negative terminal, and a control terminal of the second electronic switch is connected to the first The capacitor is electrically connected, the input terminal of the second electronic switch is electrically connected to the control terminal of the first electronic switch, the output terminal of the second electronic switch is electrically connected to the negative terminal, and when the energy storage device When connected to the energy storage device installation port, the energy storage device charges the first capacitor via the first resistor, the control terminal of the second electronic switch inputs a high level, and the second electronic The switch is closed, thereby generating the first control signal.
可选的，所述电动工具进一步包括电量显示按钮，所述电量显示按钮设置在所述电动工具的本体上，所述电量显示按钮的输入端电性连接所述正极端子，所述电量显示按钮的输出端电性连接所述降压模块，所述电量显示按钮可操作地被触发或释放，所述电量显示按钮被触发时，所述正极端子与所述降压模块之间的电性连接被导通，所述降压模块向所述控制模块提供工作电压。Optionally, the power tool further includes a power display button, the power display button is provided on the body of the power tool, an input end of the power display button is electrically connected to the positive terminal, and the power display button The output terminal of is electrically connected to the step-down module, the power display button is operatively triggered or released, and the electrical connection between the positive terminal and the step-down module is triggered when the power display button is triggered. When turned on, the step-down module provides an operating voltage to the control module.
可选的，所述电动工具进一步包括主开关，所述主开关串联连接在所述正极端子与所述电机之间，所述主开关可操作地处于导通或断开状态，当所述主开关导通时，所述正极端子与所述降压模块的电性连接被导通，所述降压模块向所述控制模块提供工作电压。Optionally, the power tool further includes a main switch, the main switch is connected in series between the positive terminal and the motor, and the main switch is operatively in an on or off state. When the switch is turned on, the electrical connection between the positive terminal and the step-down module is turned on, and the step-down module provides an operating voltage to the control module.
可选的，所述控制模块启动工作后发出保持信号给所述供电模块，所述供电模块接收到所述保持信号后，持续导通所述正极端子与所述降压模块之间的电性连接。Optionally, the control module sends a hold signal to the power supply module after the work is started, and after receiving the hold signal, the power supply module continues to conduct electricity between the positive terminal and the step-down module. connection.
可选的，所述控制模块记录所述显示单元显示电量的持续时间，当所述持续时间达到第一预设时间值且所述主开关未导通，所述电量显示按钮未触发时， 所述控制模块控制所述供电模块断开所述能量存储装置与所述降压模块之间的电性连接，所述显示单元停止显示电量。Optionally, the control module records the duration of the power displayed by the display unit. When the duration reaches a first preset time value and the main switch is not turned on, and the power display button is not triggered, all The control module controls the power supply module to disconnect the electrical connection between the energy storage device and the step-down module, and the display unit stops displaying power.
可选的，当所述持续时间未达到第一预设时间值，且控制模块检测到所述主开关由断开切换为导通时，所述控制模块持续发送保持信号给所述供电模块，且检测所述主开关的状态，当检测到所述主开关由导通切换为断开时，所述控制模块控制所述供电模块断开所述正极端子与所述降压模块之间的电性连接，所述显示单元停止显示电量。Optionally, when the duration does not reach the first preset time value and the control module detects that the main switch is switched from off to on, the control module continuously sends a hold signal to the power supply module, And detecting the state of the main switch, when detecting that the main switch is switched from on to off, the control module controls the power supply module to disconnect the power between the positive terminal and the step-down module Sexual connection, the display unit stops displaying power.
可选的，当所述持续时间未达到第一预设时间值，且控制模块检测到所述主开关处于断开状态，且所述控制模块检测到所述电量显示按钮被触发时，所述控制模块持续发送保持信号给所述供电模块，当检测到所述电量显示按钮由被触发切换为被释放时，以所述电量显示按钮被释放为起点进行计时，当所述计时超过第二预设时间值时，所述控制模块控制所述供电模块断开所述正极端子与所述降压模块之间的电性连接，所述显示单元停止显示电量。Optionally, when the duration does not reach the first preset time value, and the control module detects that the main switch is in an off state, and the control module detects that the power display button is triggered, the The control module continuously sends a hold signal to the power supply module. When it is detected that the power display button is switched from being triggered to being released, timing is performed with the power display button being released as a starting point. When the time value is set, the control module controls the power supply module to disconnect the electrical connection between the positive terminal and the step-down module, and the display unit stops displaying power.
可选的，当所述持续时间未达到第一预设时间值，所述控制模块根据能量存储装置传递的信息判断所述能量存储装置是否处于异常状态，当判断所述能量存储装置处于异常状态时，控制显示单元由显示电量的状态切换为显示能量存储装置处于异常的状态。Optionally, when the duration does not reach the first preset time value, the control module judges whether the energy storage device is in an abnormal state according to the information transmitted by the energy storage device, and when it is determined that the energy storage device is in an abnormal state At that time, the control display unit is switched from the state of displaying the electric quantity to the state of displaying that the energy storage device is abnormal.
可选的，所述能量存储装置安装口包括第一能量存储装置安装口和第二能量存储装置安装口，分别可选择地安装第一能量存储装置和第二能量存储装置，所述第一能量存储装置安装口与所述第二能量存储装置安装口串联连接，当所述第一能量存储装置安装到所述第一能量存储装置安装口，且所述第二能量存储装置安装到第二能量存储装置安装口时，所述供电模块导通所述能量存储装置与所述降压模块之间的电性连接。Optionally, the energy storage device installation port includes a first energy storage device installation port and a second energy storage device installation port, and the first energy storage device and the second energy storage device may be selectively installed, respectively, and the first energy The storage device mounting port is connected in series with the second energy storage device mounting port. When the first energy storage device is mounted to the first energy storage device mounting port, and the second energy storage device is mounted to a second energy When the storage device is installed, the power supply module conducts electrical connection between the energy storage device and the step-down module.
可选的，所述能量存储装置安装口包括第一能量存储装置安装口和第二能量存储装置安装口，分别可选择地安装第一能量存储装置和第二能量存储装置，所述第一能量存储装置安装口与所述第二能量存储装置安装口并联连接，当所述第一能量存储装置安装到所述第一能量存储装置安装口，或所述第二能量存 储装置安装到第二能量存储装置安装口时，所述供电模块导通所述能量存储装置与所述降压模块之间的电性连接。Optionally, the energy storage device installation port includes a first energy storage device installation port and a second energy storage device installation port, and the first energy storage device and the second energy storage device may be selectively installed, respectively, and the first energy The storage device installation port is connected in parallel with the second energy storage device installation port. When the first energy storage device is installed to the first energy storage device installation port, or the second energy storage device is installed to a second energy When the storage device is installed, the power supply module conducts electrical connection between the energy storage device and the step-down module.
可选的，所述控制模块获取第一能量存储装置的电量以及第二能量存储装置的电量，并根据两者中较低的电量向所述显示单元发送控制指令，所述显示单元显示第一能量存储装置和第二能量存储装置中较低的电量。Optionally, the control module obtains the power of the first energy storage device and the power of the second energy storage device, and sends a control instruction to the display unit according to the lower power of the two, and the display unit displays the first Lower power in the energy storage device and the second energy storage device.
可选的，所述显示单元包括第一显示单元和第二显示单元，所述第一显示单元显示第一能量存储装置的电量，所述第二显示单元显示第二能量存储装置的电量。Optionally, the display unit includes a first display unit and a second display unit, the first display unit displays a power amount of the first energy storage device, and the second display unit displays a power amount of the second energy storage device.
可选的，所述显示单元设置在所述能量存储装置安装口附近，并在使用者向所述能量存储装置安装口安装所述能量存储装置的状态下，所述显示单元朝向使用者。Optionally, the display unit is disposed near the energy storage device mounting port, and in a state where the user installs the energy storage device to the energy storage device mounting port, the display unit faces the user.
与现有技术相比，本发明的有益之处在于：工具使用之前，能量存储装置一旦连接至电动工具即显示电池的剩余电量，无需特意操作，用户即可获知电池的剩余电量。进一步地，在一段时间后自动停止显示电量，避免了由于用户忘记检查工具内能量存储装置的剩余电量或忘记关闭电量显示开关而造成的不必要麻烦。Compared with the prior art, the present invention is beneficial in that before the tool is used, once the energy storage device is connected to the power tool, the remaining power of the battery is displayed, and the user can know the remaining power of the battery without intentional operation. Further, automatically stopping displaying the power after a period of time avoids unnecessary troubles caused by the user forgetting to check the remaining power of the energy storage device in the tool or forgetting to turn off the power display switch.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
以上所述的本发明的目的、技术方案以及有益效果可以通过下面附图实现：The above-mentioned objects, technical solutions and beneficial effects of the present invention can be achieved through the following drawings:
图1为本发明一个实施例的电动工具的电量显示的功能模块的示意图。FIG. 1 is a schematic diagram of a functional module for displaying electric power of an electric tool according to an embodiment of the present invention.
图2为本发明的一个实施例的电动工具的电路结构的示意图。FIG. 2 is a schematic diagram of a circuit structure of a power tool according to an embodiment of the present invention.
图3为图2所示的供电模块的具体方案的示意图。FIG. 3 is a schematic diagram of a specific solution of the power supply module shown in FIG. 2.
图4为本发明一个实施例的电动工具的结构示意图。FIG. 4 is a schematic structural diagram of a power tool according to an embodiment of the present invention.
图5为本发明的第一实施例的电量显示单元的结构示意图。FIG. 5 is a schematic structural diagram of a power display unit according to the first embodiment of the present invention.
图6为本发明的第二实施例的电量显示单元的结构示意图。FIG. 6 is a schematic structural diagram of a power display unit according to a second embodiment of the present invention.
图7为本发明的第二实施例的电动工具的电路结构的示意图。FIG. 7 is a schematic diagram of a circuit structure of a power tool according to a second embodiment of the present invention.
具体实施方式Detailed ways
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本发明，并不用于限定本发明。In order to make the objectives, technical solutions, and advantages of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
图1为本发明的一个实施例的一种电动工具的电量显示的功能模块的示意图，该电动工具10包括：电池装置11、供电模块12、主控单元13、显示单元14；电池装置11安装于该电动工具本体的安装口(图中未示出)，用于给该电动工具提供电能；供电模块12电性连接至所述电池装置，电池装置11安装至该电动工具本体的安装口时，供电模块12开始给主控单元13提供驱动电能；主控单元13电性连接至所述供电模块12，获得驱动电能后，依据检测到的电池装置的状态信息，估算电池装置的电量信息；显示单元14电性连接至主控单元13，接收主控单元13传输的估算后的电池装置的电量信息后开始显示电池装置的电量，当显示电量的时间达到第一预设时间值时，主控单元13控制显示单元14停止显示电量。FIG. 1 is a schematic diagram of a function module for displaying electric power of a power tool according to an embodiment of the present invention. The power tool 10 includes: a battery device 11, a power supply module 12, a main control unit 13, and a display unit 14. The battery device 11 is installed. A mounting port (not shown in the figure) of the power tool body for supplying power to the power tool; the power supply module 12 is electrically connected to the battery device, and the battery device 11 is mounted to the mounting port of the power tool body , The power supply module 12 starts to provide driving power to the main control unit 13; the main control unit 13 is electrically connected to the power supply module 12, and after obtaining the driving power, estimates the power information of the battery device based on the detected state information of the battery device; The display unit 14 is electrically connected to the main control unit 13 and starts to display the power of the battery device after receiving the estimated power information of the battery device transmitted by the main control unit 13. When the time for displaying the power reaches a first preset time value, the main unit The control unit 13 controls the display unit 14 to stop displaying power.
在本实施例中，该主控单元13检测电池装置11的状态信息，依据检测的电压信息来估算电池装置的电量，显示单元14电性连接至所述主控单元，接收所述主控单元传输的估算后的电量信息后，开始显示电池装置的电量，当显示电量的时间达到第一预设时间值时，主控单元控制显示单元停止显示电量。In this embodiment, the main control unit 13 detects the state information of the battery device 11 and estimates the power of the battery device based on the detected voltage information. The display unit 14 is electrically connected to the main control unit and receives the main control unit. After transmitting the estimated power information, the power of the battery device is displayed. When the time for displaying the power reaches the first preset time value, the main control unit controls the display unit to stop displaying the power.
需要说明的是，本实施例中，主控单元依据采样其电性连接的电池装置的电压来估算其电量。采样时利用采样电量采样电路对电池装置的电压采样，采样后的信号经转换成主控单元可读取的信号传输至主控单元的电量检测端口。在其他实施例中，还可利用电池包内配置的BMS模块(也称控制板)，通过该BMS模块来检测电池装置内每个电芯的电压信息，并将该电压信息通过电量检测模块反馈至主控单元的电量检测端口，主控单元依据接收的电芯的状态信息及预定的电芯的电性连接方式来估算该电池包的电量。It should be noted that, in this embodiment, the main control unit estimates its power according to the voltage of the battery device that is sampled electrically. When sampling, the voltage of the battery device is sampled by the sampling power sampling circuit, and the sampled signal is converted into a signal that can be read by the main control unit and transmitted to the power detection port of the main control unit. In other embodiments, a BMS module (also referred to as a control board) configured in the battery pack can also be used to detect the voltage information of each battery cell in the battery device through the BMS module, and feedback the voltage information through the power detection module. To the power detection port of the main control unit, the main control unit estimates the power of the battery pack according to the status information of the received battery cells and the predetermined electrical connection method of the battery cells.
图2所示为本发明的一个实施例的电动工具的电路结构的示意图。电动工具包括图1所示的实施例的功能模块，还包括：一个电量显示按钮15，配置于所述电动工具的本体上，电性连接至所述主控单元13；一个主开关16，配置于 所述电动工具的本体上，电性连接至所述电池装置11，主开关16闭合时所述电动工具从所述电池装置11获得电能。在一种实施例中电量显示按钮15为开关按键，主开关16为具有调速和通断功能的开关。FIG. 2 is a schematic diagram showing a circuit structure of a power tool according to an embodiment of the present invention. The power tool includes the functional module of the embodiment shown in FIG. 1, and further includes: a power display button 15 configured on the body of the power tool and electrically connected to the main control unit 13; a main switch 16 configured The main body of the power tool is electrically connected to the battery device 11. When the main switch 16 is closed, the power tool obtains electric energy from the battery device 11. In one embodiment, the power display button 15 is a switch button, and the main switch 16 is a switch with speed adjustment and on / off functions.
本实施例中，主控单元13包括降压模块131、MCU控制模块132、电量采样模块133、控制电动工具的驱动模块134，MCU控制模块132通过降压模块131获得电能，MCU控制模块可以为MCU(Microcontroller Unit，微控制单元)，单片机，等能够处理指令的芯片，其具有多个I/O端口，被配置为接收/传输不同功能的指令。主控单元还具有其他功能，如过流模块，温度检测模块、欠压保护模块等。主控单元13接收到电量显示指令(也称“信号”)，控制显示单元14按预先设定的电量显示规则进行电量显示。In this embodiment, the main control unit 13 includes a step-down module 131, an MCU control module 132, a power sampling module 133, and a drive module 134 that controls the power tool. The MCU control module 132 obtains power through the step-down module 131. The MCU control module may be MCU (Microcontroller Unit), single chip microcomputer, and other chips capable of processing instructions, which have multiple I / O ports, are configured to receive / transmit instructions of different functions. The main control unit also has other functions, such as overcurrent module, temperature detection module, undervoltage protection module, etc. The main control unit 13 receives a power display instruction (also referred to as a "signal"), and controls the display unit 14 to perform power display according to a preset power display rule.
本实施例中，电量显示指令在不同阶段具有不同的描述，电池装置11正确安装到该电动工具本体的安装口的瞬时，描述为主控单元13上电；电池装置11正确安装于该电动工具本体的安装口之后，描述为主控单元接收所述电量显示按钮15被触发的电量显示指令，或主开关16被闭合的电量显示指令，主控单元13实时地(周期地)接收电量显示指令。In this embodiment, the power display instruction has different descriptions at different stages. The moment when the battery device 11 is correctly installed in the mounting port of the power tool body is described as the main control unit 13 is powered on; the battery device 11 is correctly installed in the power tool. After the installation of the main body, it is described that the main control unit receives the power display command triggered by the power display button 15 or the main switch 16 is closed, and the main control unit 13 receives the power display command in real time (periodically). .
本实施例中，当电池装置11正确安装到该电动工具本体的安装口的瞬间，主控单元13通过供电模块12获得驱动电能，控制显示单元14开始显示电量，并计时。在计时时间未达到第一预设时间值时，若主控单元13接收到主开关16闭合的电量显示指令，则不论主控单元13是否接收到电量显示开关15被触发的电量显示指令，主控单元执行主开关闭合16的电量显示指令对应的第一电量显示规则；在计时时间未达到第一预设时间值时，若主控单元13检测到主开关16断开的状态信息时，用户按压电量显示按钮15，主控单元13接收到电量显示按钮15被触发的电量显示指令，主控单元13执行电量显示按钮15被触发的电量显示指令对应的第二电量显示规则；在计时时间达到第一预设时间值时，工具10进入待机模式。In this embodiment, when the battery device 11 is correctly installed in the mounting port of the power tool body, the main control unit 13 obtains driving power through the power supply module 12, and controls the display unit 14 to start displaying power and time it. When the counting time does not reach the first preset time value, if the main control unit 13 receives the power display instruction that the main switch 16 is closed, regardless of whether the main control unit 13 receives the power display instruction that the power display switch 15 is triggered, the main The control unit executes the first power display rule corresponding to the power display instruction of the main switch closing 16; when the timing time does not reach the first preset time value, if the main control unit 13 detects the state information of the main switch 16 being opened, the user When the power display button 15 is pressed, the main control unit 13 receives the power display instruction triggered by the power display button 15 and the main control unit 13 executes the second power display rule corresponding to the power display instruction triggered by the power display button 15; At the first preset time value, the tool 10 enters the standby mode.
需要特别说明的是本实施例中，工具进入待机模式时，主控单元13控制供电模块12断电，使电动工具主体内所有电路断开与电池装置的连接，由于主控 单元13断电，显示单元14无法获得电能，结束(或停止)显示单元的电量显示。在其他实施例中，工具进入待机模式时，主控单元13控制显示单元14停止显示电量，延时一段时间断开供电模块12与电池装置11的连接，延时时间内检测电池装置11的状态，当电池出现异常状态，如过温、过充、过放时，控制显示单元显示异常状态。It should be noted that in this embodiment, when the tool enters the standby mode, the main control unit 13 controls the power supply module 12 to power off, so that all circuits in the main body of the power tool are disconnected from the battery device. Because the main control unit 13 is powered off, The display unit 14 cannot obtain power, and ends (or stops) the power display of the display unit. In other embodiments, when the tool enters the standby mode, the main control unit 13 controls the display unit 14 to stop displaying power, disconnects the power supply module 12 from the battery device 11 after a delay, and detects the state of the battery device 11 within the delay time. When the battery has an abnormal state, such as over-temperature, over-charge, or over-discharge, the control display unit displays an abnormal state.
本实施例中，工具进入待机模式后，若主控单元接收到主开关16闭合或电量显示按钮15被触发的电量显示指令，则执行本实施例中前述的电池装置11正确安装到该电动工具本体的安装口后，计时时间未达到第一阈值时，不同电量显示指令下对应的电量显示规则。In this embodiment, after the tool enters the standby mode, if the main control unit receives the power display instruction that the main switch 16 is closed or the power display button 15 is triggered, the aforementioned battery device 11 in this embodiment is correctly installed to the power tool. After the installation port of the body, when the timing time does not reach the first threshold, corresponding power display rules under different power display instructions.
本实施例中，所述的第一电量显示规则为：主控单元13控制显示单元14显示电量，并实时检测主开关16状态，根据检测到主开关16断开的状态信息时，主控单元13控制供电模块12断电，工具进入待机模式。所述的第二电量显示规则为：主控单元13控制显示单元14显示电量，并开始计时，计时过程中实时检测电量显示开关15状态，若计时时间未达到第二预设时间值，当检测到电量显示开关15被触发时，重新开始计时，当计时时间达到第二预设时间值时主控单元13控制供电模块12断电，工具进入待机模式。待机模式在上述实施例中，已有描述，这里不再重复阐述。In this embodiment, the first power display rule is: the main control unit 13 controls the display unit 14 to display the power, and detects the state of the main switch 16 in real time. When the state information of the main switch 16 is detected to be off, the main control unit 13 Control the power supply module 12 to power off, and the tool enters the standby mode. The second power display rule is as follows: the main control unit 13 controls the display unit 14 to display the power and start timing. During the timing, the state of the power display switch 15 is detected in real time. If the timing does not reach the second preset time value, When the power display switch 15 is triggered, the timing is restarted. When the timing reaches a second preset time value, the main control unit 13 controls the power supply module 12 to power off and the tool enters the standby mode. The standby mode has been described in the above embodiment, and will not be repeated here.
图3所示为图2所示的实施例中供电模块的具体方案的示意图，供电模块12包括电阻、电容、整流二极管、稳压二极管和开关管，电池装置安装到电动工具本体的安装口的瞬时，通过R1、R2、C1、D2、R7所在回路维持给电容C1充电，充电过程中开关管MosA维持导通，从而开关管MosB导通。参照图2，MosB导通后，电池包通过MosB给后端的降压模块131供电，从而MCU控制模块132上电，MCU控制模块132一旦上电，Power_on立即发送方波信号，维持MosA导通，从而可以维持供电模块12一直有电，主控单元13获得电能。主控单元13控制显示单元14停止显示电量时，Power_on输出低电平，MosA关断，供电模块12无法向后端降压模块131供电，电动工具10内部所有电路断电。FIG. 3 is a schematic diagram of a specific solution of the power supply module in the embodiment shown in FIG. 2. The power supply module 12 includes a resistor, a capacitor, a rectifier diode, a zener diode, and a switch tube. The battery device is mounted to the mounting port of the power tool body. Instantaneously, the capacitor C1 is maintained to be charged through the circuit where R1, R2, C1, D2, and R7 are located. During the charging process, the switch MosA is kept on, and the switch MosB is turned on. Referring to FIG. 2, after MosB is turned on, the battery pack supplies power to the back-end step-down module 131 through MosB, so that the MCU control module 132 is powered on. Once the MCU control module 132 is powered on, Power_on immediately sends a square wave signal to maintain MosA on. Thereby, the power supply module 12 can be kept powered all the time, and the main control unit 13 can obtain power. When the main control unit 13 controls the display unit 14 to stop displaying power, Power_on outputs a low level, MosA is turned off, the power supply module 12 cannot supply power to the back-end step-down module 131, and all internal circuits of the power tool 10 are powered off.
参照图2，待机模式下，按压电量显示按钮15，降压模块131不经过供电模块，直接从电池装置11获得电能，从而MCU控制模块132上电，MCU控 制模块132一旦上电，Power_on立即发送方波信号，维持MosA导通，从而可以维持供电模块12一直有电；MCU控制单元132在松开电量显示按钮15后，仍保持得电。待机模式下，闭合主开关16，降压模块131不经过供电模块，直接从电池装置11获得电能，从而MCU控制模块132上电，MCU控制模块132一旦上电，Power_on立即发送方波信号，维持MosA导通；断开主开关16，MCU控制模块132的MSW_DETECT端口接收到主开关16断开的信号，Power_on输出低电平，MosA关断，供电模块12无法向后端降压模块131供电，电动工具内部所有电路断电。Referring to FIG. 2, in the standby mode, when the power display button 15 is pressed, the step-down module 131 directly receives power from the battery device 11 without passing through the power supply module, so that the MCU control module 132 is powered on, and once the MCU control module 132 is powered on, Power_on sends The square wave signal keeps the MosA on, so that the power supply module 12 can be kept powered; the MCU control unit 132 remains powered after the power display button 15 is released. In the standby mode, the main switch 16 is closed, and the step-down module 131 directly receives power from the battery device 11 without passing through the power supply module, so that the MCU control module 132 is powered on. Once the MCU control module 132 is powered on, Power_on immediately sends a square wave signal to maintain MosA is turned on; when the main switch 16 is turned off, the MSW_DETECT port of the MCU control module 132 receives a signal that the main switch 16 is turned off. Power_on outputs a low level. MosA is turned off. All electrical circuits inside the power tool are de-energized.
接下来，以电池装置11为多个电池包110(每组电池包内包含有多颗电池芯片，其按照一定规则电性连接。每组电池包的MAX电压可为12V(连接类型：如3S1P，3S2P等)，16V，20V，24V等，具体的可视电动工具10的应用场合，在此不作限定。电池芯片可选用锂电池，燃料电池等)组成的电动工具10来描述本发明的提出的实施，电池包110以可插拔的方式安装于电动工具本体的安装口。Next, the battery device 11 is a plurality of battery packs 110 (each battery pack contains a plurality of battery chips, which are electrically connected according to certain rules. The MAX voltage of each battery pack can be 12V (connection type: such as 3S1P , 3S2P, etc.), 16V, 20V, 24V, etc., the specific application of the visual power tool 10 is not limited here. The battery chip may use a lithium battery, a fuel cell, etc.) to describe the proposed invention In practice, the battery pack 110 is plugged into the mounting port of the power tool body.
如图4所示为本发明一个实施例的一种电动工具的结构示意图。电动工具包含：电动工具本体100；配置于电动工具本体100的用以匹配安装电池包的安装口110a；供电模块，配置于电动工具的本体100的内部；主控单元(图未示)配置于电动工具的本体100的内部；2个电池包110，分别可插拔的安装于匹配的安装口110a，电性连接后给电动工具提供电能；显示单元120，电性连至主控单元；供电模块，电性连接电池包，为主控单元提供电能；主控单元，基于采样的电池包110的状态信息，估算出电池包的电量信息，并传输给显示单元；显示单元140接收主控单元发出的电量信息并显示。显示单元140安装在安装口110a附近，并在电池包110向电动工具本体安装的状态下，朝向使用者。具体的，如图4所示。FIG. 4 is a schematic structural diagram of an electric tool according to an embodiment of the present invention. The power tool includes: a power tool body 100; an installation opening 110a configured to match the installation of a battery pack in the power tool body 100; a power supply module disposed inside the power tool body 100; a main control unit (not shown) disposed in The inside of the body of the power tool 100; two battery packs 110, which are pluggable and installed in the corresponding mounting ports 110a, respectively, and provide electrical power to the power tool after being electrically connected; the display unit 120, which is electrically connected to the main control unit; The module is electrically connected to the battery pack to provide power to the main control unit; the main control unit estimates the battery pack power information based on the sampled battery pack 110 state information and transmits it to the display unit; the display unit 140 receives the main control unit The power message is displayed and displayed. The display unit 140 is mounted near the mounting port 110a, and faces the user in a state where the battery pack 110 is mounted on the power tool body. Specifically, as shown in FIG. 4.
在本实施例中，2个电池包110分别安装于电动工具本体100的安装口(如，卡扣形式电池包安装于本体)。电池包110分别配置于电动工具本体的手柄部区域的两侧(也可2个电池包110配置于一侧)。有时还可在电动工具本体100配置的辅助手柄，这样便于用户利用该电动工具进行作业。本实施例 的电动工具的显示单元140配置于电池装置安装口110a附近的电动工具本体的表面(如图4所示)，有时还可以配置于电动工具本体100的手柄区域。In this embodiment, the two battery packs 110 are respectively installed at the installation openings of the power tool body 100 (for example, a battery pack in the form of a clip is installed on the body). The battery packs 110 are respectively disposed on both sides of the handle portion area of the power tool body (two battery packs 110 may be disposed on one side). In some cases, an auxiliary handle may be provided on the power tool body 100 so that the user can use the power tool to perform work. The display unit 140 of the power tool of this embodiment is disposed on the surface of the power tool body (as shown in FIG. 4) near the battery device mounting port 110 a, and may also be disposed on the handle area of the power tool body 100.
本实施例的主控单元利用电量采样模块对电性连接的电池包进行电压采样。估算动作同上，在此不再重复阐述。The main control unit of this embodiment uses a power sampling module to perform voltage sampling on an electrically connected battery pack. The estimation action is the same as above, and will not be repeated here.
图5所示为本发明的一个实施例中电动工具的显示单元的结构示意图。显示单元140，电性连接至主控单元，包括：电量模块141，主控单元接收到电量显示指令，控制所述显示单元响应电量显示指令，依据该电量显示指令对应的电量显示规则，显示所述电池装置的总电量，所述电池装置由多个电池包串联或并联组成。FIG. 5 is a schematic structural diagram of a display unit of a power tool according to an embodiment of the present invention. The display unit 140, which is electrically connected to the main control unit, includes: a power module 141. The main control unit receives the power display instruction, controls the display unit to respond to the power display instruction, and displays the power according to a power display rule corresponding to the power display instruction. The total power of the battery device is described. The battery device is composed of multiple battery packs connected in series or in parallel.
上述实施例的主控单元利用电量采样电路对电性连接的电池包的电压采样。电量模块141包含有多个LED指示灯。具体的包含有多个LED指示灯，可预先的设定的点亮规则(如依据检测的电池包的电压信息，设定指示灯的点亮的数量)，点亮LED指示灯的数量反应当前电池装置的总电量(若电池装置由2个电池包电性并联，总电量显示为2个电池包间电压低的电池包对应的电量)。如电量模块141包含有3个LED指示灯组合(以电池装置的电量的MAX电压20V为例，若检测的电池装置的电压>20V时，3个LED全亮；检测的电池装置的电压>18.5V时，2个LED点亮，检测的电池装置的电压>16V时，1个LED点亮)；或其他数量的LED指示灯组合或其他模拟显示数量的指示(如设计成柱状电池状，里面填充的阴影表示电量)。在此不一一列举，能实现本方案的目的即可，即用户通过查看电量模块能知晓当前的电池包电性连接的电量即可。本实施例的控制单元对电池包的电压采样，估算动作同上，在此不在重复阐述。The main control unit of the above embodiment uses the power sampling circuit to sample the voltage of the battery pack that is electrically connected. The power module 141 includes a plurality of LED indicators. It specifically includes multiple LED indicators, which can be preset lighting rules (such as setting the number of indicators to be lit according to the voltage information of the detected battery pack), and the number of LED indicators to reflect the current The total power of the battery device (if the battery device is electrically connected in parallel by two battery packs, the total power is displayed as the power corresponding to the battery pack with a low voltage between the two battery packs). For example, the power module 141 includes a combination of three LED indicators (take the battery device's MAX voltage of 20V as an example, if the detected battery device voltage> 20V, the three LEDs are all on; the detected battery device voltage> 18.5 At V, 2 LEDs are lit, and when the detected battery device voltage is> 16V, 1 LED is lit); or other number of LED indicator combinations or other analog display quantity indicators (such as designed as a cylindrical battery, inside Filled shadows indicate power). It is not necessary to list them one by one, as long as the purpose of this solution can be achieved, that is, the user can know the power of the current electrical connection of the battery pack by viewing the power module. The control unit of this embodiment samples the voltage of the battery pack, and the estimation operation is the same as above, and is not repeated here.
在其他实施例中，总电量可以为两个电池包的平均电量，或基于两个电池包的电量进行预设算法运算后的综合电量。在双包串联的情况下，总量可以为两个电池包中电量低的电池包对应的电量，或两个电池包的平均电量，或基于两个电池包的电量进行预设算法运算后的综合电量。In other embodiments, the total power may be the average power of the two battery packs, or the integrated power after a predetermined algorithm is performed based on the power of the two battery packs. In the case of double packs in series, the total amount can be the power corresponding to the low battery packs in the two battery packs, or the average power of the two battery packs, or a preset algorithm based on the power of the two battery packs Integrated power.
在其他实施例中，显示单元也可以不显示总电量，而是先显示第一电池包 的电量，再显示第二电池包的电量。即分时显示不同电池包的电量。可选的，显示单元可以先显示第一电池包的电量，再显示第二电池包的电量，最后再显示总电量。即分时显示不同电池包的电量及总电量。In other embodiments, the display unit may not display the total power, but first display the power of the first battery pack, and then display the power of the second battery pack. The power of different battery packs is displayed in time sharing. Optionally, the display unit may first display the power of the first battery pack, then display the power of the second battery pack, and finally display the total power. That is, the power and total power of different battery packs are displayed in time sharing.
上述实施例中，若电池包的电量低于设定的阈值(如16V)时，电量模块中点亮的指示灯提示警报信息(如，灯闪烁；指示灯显示醒目的颜色，具体的视应用场合而定)。In the above embodiment, if the power of the battery pack is lower than a set threshold (for example, 16V), the light indicator in the power module prompts an alarm message (for example, the light flashes; the indicator light displays a striking color, depending on the application) Depending on the occasion).
图6所示为本发明的一个实施例的电动工具的显示单元的结构示意图。显示单元140包括：电量模块141，电量显示按钮142。与图5的方案的区别在于电量显示按钮集成在显示单元140。而图3所示的方案中电量显示按钮位于电动工具的本体(图未示)，或电动工具不包含电量显示按钮。本实施例中控制单元利用电量采样模块对电池装置的电压采样。估算动作同上，在此不在重复阐述。FIG. 6 is a schematic structural diagram of a display unit of a power tool according to an embodiment of the present invention. The display unit 140 includes a power module 141 and a power display button 142. The difference from the solution in FIG. 5 is that the power display button is integrated in the display unit 140. In the solution shown in FIG. 3, the power display button is located on the body of the power tool (not shown), or the power tool does not include a power display button. In this embodiment, the control unit uses the power sampling module to sample the voltage of the battery device. The estimation action is the same as above, and is not repeated here.
在显示单元的设计中，若电动工具发生异常，显示单元还可发出警报的提示，如：电机异常，控制板异常，电池包异常(如电池包的电压低于设定的阈值)等等。In the design of the display unit, if an abnormality occurs in the power tool, the display unit can also issue alarms, such as: abnormal motor, control board abnormality, abnormal battery pack (such as the voltage of the battery pack is lower than the set threshold) and so on.
上述图5和图6的实施例的电动工具的显示单元包含的电量模块由LED指示灯组成，在显示单元的其他设计中，显示单元还可以为显示屏，显示屏包含显示电池装置电量的电量模块，可选的包含可充当电量显示按钮功能的电量显示触摸开关。电量显示按钮电性连接主控单元，主控单元接收到电量显示按钮被触发的电量显示指令(主控单元接收到电量显示按钮被触发的电量显示指令，被触发可被描述为被按压，或被有效按压)，控制显示单元响应该信号并电量显示。电量显示按钮的形式，可采用机械按钮开关，触摸式开关，红外传感器等。用户按压设置于电动工具本体的电量显示按钮可理解为按压按钮一次，按压按钮并保持设定的时间(如1S、2S、3S等)，在此不作限定，只要能实现通过按压电量显示按钮显示单元相应该动作而显示即可。The power module included in the display unit of the electric tool of the embodiment shown in FIG. 5 and FIG. 6 is composed of an LED indicator. In other designs of the display unit, the display unit may also be a display screen. Module, optionally includes a touch switch for power display that functions as a power display button. The power display button is electrically connected to the main control unit. The main control unit receives the power display command triggered by the power display button. (The main control unit receives the power display command triggered by the power display button. The trigger can be described as being pressed, or Being pressed effectively), the control display unit responds to the signal and the power is displayed. The form of power display button can be mechanical button switch, touch switch, infrared sensor, etc. The user pressing the power display button provided on the power tool body can be understood as pressing the button once, pressing the button and holding the set time (such as 1S, 2S, 3S, etc.), which is not limited here, as long as the display by pressing the power display button can be realized The units may be displayed in response to the action.
在电量显示按钮的设计中，电量显示按钮电量显示按钮配置于安装口之间的本体的表面。还可配置于本体的手柄附近。In the design of the power display button, the power display button is disposed on the surface of the body between the mounting ports. It can also be placed near the handle of the body.
接下来参照图1描述本发明提出的电动工具的电量显示方法。Next, a method for displaying a power amount of a power tool according to the present invention will be described with reference to FIG. 1.
该方法的电动工具包括：电池安装口，电池装置安装于所述安装口，用以给所述电动工具提供电能；供电模块，电性连接至所述电池装置；主控单元，电性连接至所述供电模块，从所述供电模块获得驱动电能，并依据检测到的所述电池装置的状态信息，估算所述电池装置的电量信息；显示单元，电性连接至所述主控单元，接收所述主控单元传输的所述估算后的电量信息。其特征在于：所述方法包括：主控单元13在电池装置11安装于工具本体的安装口时，从供电模块12获得驱动电能；向显示单元14传输电量显示指令；控制所述显示单元14响应电量显示指令开始显示电池装置的电量，并开始计时；计时时间达到第一预设时间值时，控制所述显示单元14停止显示所述电池装置的电量。The power tool of the method includes a battery installation port, and a battery device is installed at the installation port to provide electric power to the power tool; a power supply module is electrically connected to the battery device; a main control unit is electrically connected to The power supply module obtains driving power from the power supply module, and estimates the power amount information of the battery device according to the detected state information of the battery device; the display unit is electrically connected to the main control unit and receives The estimated power amount information transmitted by the main control unit. The method is characterized in that the method includes: the main control unit 13 obtains driving power from the power supply module 12 when the battery device 11 is installed at the mounting port of the tool body; transmits a power display instruction to the display unit 14; and controls the display unit 14 to respond The power display instruction starts to display the power of the battery device and starts timing; when the timing reaches a first preset time value, the display unit 14 is controlled to stop displaying the power of the battery device.
上述实施方法中，主控单元在接收电量显示信号后，发出电池包的电压信息采样指令，经采样电路采样的电池包的电压信息反馈至电压信号端口。In the above implementation method, after receiving the power display signal, the main control unit issues a voltage information sampling instruction of the battery pack, and the voltage information of the battery pack sampled by the sampling circuit is fed back to the voltage signal port.
具体的，该方法的电动工具10还包括：一个电量显示按钮(图未示)，配置于电动工具的本体上，电性连接至主控单元。该方法包括：主控单元13基于接收到的电量显示按钮被触发的电量显示指令；向显示单元14传输电量显示指令；控制所述显示单元14响应电量显示指令开始显示所述电池装置的电量，并开始计时；计时时间达到第二预设时间值时，控制显示单元14停止显示电池装置的电量。Specifically, the power tool 10 of the method further includes a power display button (not shown), which is disposed on the body of the power tool and is electrically connected to the main control unit. The method includes: the main control unit 13 is configured to display a power display instruction based on the received power display button; transmit a power display instruction to the display unit 14; and control the display unit 14 to start displaying the power of the battery device in response to the power display instruction, When the timing reaches the second preset time value, the control display unit 14 stops displaying the power of the battery device.
具体的该方法的电动工具10还包括：一个主开关(图未示)，配置于电动工具的本体上，电性连接至电池装置11。该方法包括：主控单元13基于接收的主开关闭合的电量显示指令；向显示单元14传输电量显示指令；控制所述显示单元14响应电量显示指令开始显示所述电池装置的电量；实时检测主开关的状态信息；检测到主开关断开时，控制显示单元14停止显示电池装置的电量。Specifically, the power tool 10 of the method further includes a main switch (not shown), which is disposed on the body of the power tool and is electrically connected to the battery device 11. The method includes: the main control unit 13 based on the received electric quantity display instruction of the main switch being closed; transmitting the electric quantity display instruction to the display unit 14; controlling the display unit 14 to start displaying the electric quantity of the battery device in response to the electric quantity display instruction; Switch status information; when the main switch is detected to be off, the control display unit 14 stops displaying the power of the battery device.
如图7所示为本发明第二实施例的电动工具的电路结构示意图。本实施例与图2所示第一实施例的差异在于供电模块12与控制模块132的power-on端口输出之间没有电性连接。也就是说供电模块12不需要来自控制模块132的power-on端口的信号维持其处于导通状态，而是通过其自身电路的设置维持其 处于导通状态，以实现在电池装置安装到安装口之后，在一段时间内维持电池装置与降压模块131的电性连接。FIG. 7 is a schematic diagram of a circuit structure of a power tool according to a second embodiment of the present invention. The difference between this embodiment and the first embodiment shown in FIG. 2 is that there is no electrical connection between the power supply module 12 and the power-on port output of the control module 132. That is to say, the power supply module 12 does not need a signal from the power-on port of the control module 132 to maintain its on-state, but maintains its on-state through the setting of its own circuit to achieve the installation of the battery device to the installation port. After that, the electrical connection between the battery device and the step-down module 131 is maintained for a period of time.
可选的，供电模块12包括连接在正极端子B+和负极端子B-之间的触发单元，以及设置在正极端子B+与降压模块131之间且受触发单元控制的第一电子开关。当电池装置配接到电池装置安装口时，触发单元从电池装置的正极获得电压生成第一控制信号。第一控制信号输出给第一电子开关的控制端，控制第一电子开关导通，从而导通电池装置与降压模块131之间的电性连接。Optionally, the power supply module 12 includes a trigger unit connected between the positive terminal B + and the negative terminal B-, and a first electronic switch disposed between the positive terminal B + and the step-down module 131 and controlled by the trigger unit. When the battery device is connected to the battery device installation port, the trigger unit obtains a voltage from the positive electrode of the battery device to generate a first control signal. The first control signal is output to a control terminal of the first electronic switch, and controls the first electronic switch to be turned on, thereby conducting the electrical connection between the battery device and the step-down module 131.
可选的，触发单元的设计如图3所示，包括串联在正极端子B+和负极端子B-之间的第一电阻R1、第一电容C1以及第二电子开关MOSA。第二电子开关MOSA的控制端与第一电容C1经二极管D2电性连接。第二电子开关MOSA的输入端与第一电子开关MOSB的控制端电性连接。第二电子开关MOSA的输出端与负极端子B-电性连接。当电池装置配接到电池装置安装口时，电池装置经第一电阻R1给第一电容C1充电，第二电子开关MOSA的控制端输入高电平，第二电子开关MOSA闭合，从而生成第一控制信号。Optionally, the design of the trigger unit is shown in FIG. 3 and includes a first resistor R1, a first capacitor C1, and a second electronic switch MOSA connected in series between the positive terminal B + and the negative terminal B-. The control terminal of the second electronic switch MOSA is electrically connected to the first capacitor C1 via the diode D2. An input terminal of the second electronic switch MOSA is electrically connected to a control terminal of the first electronic switch MOSB. The output terminal of the second electronic switch MOSA is electrically connected to the negative terminal B-. When the battery device is connected to the battery device installation port, the battery device charges the first capacitor C1 via the first resistor R1, the control terminal of the second electronic switch MOSA inputs a high level, and the second electronic switch MOSA is closed, thereby generating the first control signal.
为实现在电池装置安装到电池装置安装口之后，在一段时间内维持电池装置与降压模块131的电性连接，可选的，将第一电容C1的容量设置得较大，以其在电池装置安装到电池装置安装口瞬间存储的电量维持第一电子开关MOSB在一段时间内的导通。当第一电容C1内存储的电量消耗殆尽后，第二电子开关MOSA断开，继而第一电子开关MOSB断开，降压模块131与电池装置之间的电性连接断开，降压模块131不再给控制模块132提供工作电压。控制模块132停止工作，显示单元14不再显示。整个电路进入低功耗状态。In order to maintain the electrical connection between the battery device and the step-down module 131 for a period of time after the battery device is installed in the battery device installation port, optionally, the capacity of the first capacitor C1 is set to be large, so that it can be used in the battery. The power stored momentarily when the device is installed to the battery device installation port maintains the conduction of the first electronic switch MOSB for a period of time. When the power stored in the first capacitor C1 is exhausted, the second electronic switch MOSA is turned off, and then the first electronic switch MOSB is turned off. The electrical connection between the step-down module 131 and the battery device is broken. 131 no longer provides the operating voltage to the control module 132. The control module 132 stops working, and the display unit 14 is no longer displayed. The entire circuit enters a low power state.
除前述实施例所述的电量显示规则外，本发明还提供第三电量显示规则。具体的，电池装置安装到电动工具本体的安装口后，控制模块132经降压模块131从电池装置获得工作电压，控制模块132启动工作，显示单元14显示电池装置的电量。根据图7所示的第二实施例，供电模块12与控制模块132的power-on输出端口之间无电性连接，供电模块12自身储存电量消耗完毕后，断开降压模块131与电池装置之间的连接，控制模块132不再获得工作电压， 显示模块14停止显示。整个电路进入低功耗状态。In addition to the power display rule described in the foregoing embodiment, the present invention also provides a third power display rule. Specifically, after the battery device is installed in the installation port of the power tool body, the control module 132 obtains the operating voltage from the battery device via the voltage step-down module 131, the control module 132 starts work, and the display unit 14 displays the power of the battery device. According to the second embodiment shown in FIG. 7, there is no electrical connection between the power supply module 12 and the power-on output port of the control module 132. After the power consumption of the power supply module 12 itself is consumed, the voltage step-down module 131 and the battery device are disconnected. The connection between the control module 132 no longer obtains the operating voltage, and the display module 14 stops displaying. The entire circuit enters a low power state.
本发明还提供第四显示规则。具体的，电池装置安装到电动工具本体的安装口后，控制模块132经降压模块131从电池装置获得工作电压，控制模块132启动工作，显示单元14显示电池装置的电量。根据图2所示的第一实施例，随后，控制模块132的power-on输出端口输出方波信号给供电模块12，供电模块12基于该脉冲信号持续导通电池装置与降压模块131之间的电性连接，控制模块132持续工作，显示单元14持续进行电量显示。控制模块132记录显示单元14进行电量显示的时间，当达到第一预设时间值后，控制显示单元14停止显示，同时停止power-on输出端口输出方波信号，供电模块12断开电池装置与降压模块131之间的电性连接，控制模块132不再获得工作电压。整个电路进入低功耗状态。The present invention also provides a fourth display rule. Specifically, after the battery device is installed in the installation port of the power tool body, the control module 132 obtains the operating voltage from the battery device via the voltage step-down module 131, the control module 132 starts work, and the display unit 14 displays the power of the battery device. According to the first embodiment shown in FIG. 2, the power-on output port of the control module 132 then outputs a square wave signal to the power supply module 12, and the power supply module 12 continuously turns on the battery device and the step-down module 131 based on the pulse signal. Is electrically connected, the control module 132 continues to work, and the display unit 14 continuously performs power display. The control module 132 records the time when the display unit 14 performs the power display. When the first preset time value is reached, the control display unit 14 stops displaying and stops the power-on output port from outputting a square wave signal. The power supply module 12 disconnects the battery device and The electrical connection between the step-down modules 131, and the control module 132 no longer obtains the operating voltage. The entire circuit enters a low power state.
本发明还提供第五显示规则。具体的，电池装置安装到电动工具本体的安装口后，进入第三规则。在供电模块12自身储存电量消耗完毕之前，若控制模块132检测到电量显示按钮15被触发，则进入第二显示规则。可选的，第五显示规则还可以为，电池装置安装到电动工具本体的安装口后，进入第四显示规则。控制模块132记录显示单元14进行电量显示的时间，当未达到第一预设时间值时，若控制模块132检测到电量显示按钮15被触发，则进入第二显示规则。The present invention also provides a fifth display rule. Specifically, after the battery device is installed in the mounting port of the power tool body, it enters the third rule. Before the power consumption of the power supply module 12 itself is consumed, if the control module 132 detects that the power display button 15 is triggered, it enters a second display rule. Optionally, the fifth display rule may also be that the battery device enters the fourth display rule after the battery device is installed in the mounting port of the power tool body. The control module 132 records the time when the display unit 14 performs power display. When the first preset time value is not reached, if the control module 132 detects that the power display button 15 is triggered, it enters the second display rule.
本发明还提供第六显示规则。具体的，电池装置安装到电动工具本体的安装口后，进入第三规则。在供电模块12自身储存电量消耗完毕之前，若控制模块132检测到主开关16导通，则进入第一显示规则。可选的，第六显示规则还可以为，电池装置安装到电动工具本体的安装口后，进入第四显示规则。控制模块132记录显示单元14进行电量显示的时间，当未达到第一预设时间值时，若控制模块132检测到主开关16导通，则进入第一显示规则。The invention also provides a sixth display rule. Specifically, after the battery device is installed in the mounting port of the power tool body, it enters the third rule. Before the power consumption of the power supply module 12 itself is consumed, if the control module 132 detects that the main switch 16 is turned on, it enters the first display rule. Optionally, the sixth display rule may also be that after the battery device is installed in the mounting port of the power tool body, the fourth display rule is entered. The control module 132 records the time when the display unit 14 performs the power display. When the first preset time value is not reached, if the control module 132 detects that the main switch 16 is turned on, it enters the first display rule.
本发明还提供第七显示规则。具体的，电池装置安装到电动工具本体的安装口后，进入第三规则。在供电模块12自身储存电量消耗完毕之前，若控制模块132检测到主开关16导通，则进入第一显示规则。进入第一显示规则后，若控制模块132检测到电量显示按钮15被触发，且在主开关16断开前被释放， 则仍按照第一显示规则进行显示。进入第一显示规则后，若控制模块132检测到电量显示按钮15被触发，且在主开关16断开后仍被触发，则在主开关16断开后按照第二显示规则进行显示。可选的，第六显示规则还可以为，电池装置安装到电动工具本体的安装口后，进入第四规则。控制模块132记录显示单元14进行电量显示的时间，当未达到第一预设时间值时，若控制模块132检测到主开关16导通，则进入第一显示规则。进入第一显示规则后，若控制模块132检测到电量显示按钮15被触发，且在主开关16断开前被释放，则仍按照第一显示规则进行显示。进入第一显示规则后，若控制模块132检测到电量显示按钮15被触发，且在主开关16断开后仍被触发，则按照第二显示规则进行显示。The invention also provides a seventh display rule. Specifically, after the battery device is installed in the mounting port of the power tool body, it enters the third rule. Before the power consumption of the power supply module 12 itself is consumed, if the control module 132 detects that the main switch 16 is turned on, it enters the first display rule. After entering the first display rule, if the control module 132 detects that the power display button 15 is triggered and is released before the main switch 16 is turned off, the display is still performed according to the first display rule. After entering the first display rule, if the control module 132 detects that the power display button 15 is triggered and is still triggered after the main switch 16 is turned off, the display is performed according to the second display rule after the main switch 16 is turned off. Optionally, the sixth display rule may also be that the battery device enters the fourth rule after being installed in the mounting port of the power tool body. The control module 132 records the time when the display unit 14 performs the power display. When the first preset time value is not reached, if the control module 132 detects that the main switch 16 is turned on, it enters the first display rule. After entering the first display rule, if the control module 132 detects that the power display button 15 is triggered and is released before the main switch 16 is turned off, the display is still performed according to the first display rule. After entering the first display rule, if the control module 132 detects that the power display button 15 is triggered and is still triggered after the main switch 16 is turned off, the display is performed according to the second display rule.
本发明还提供第八显示规则。具体的，电池装置安装到电动工具本体的安装口后，进入第三规则。在供电模块12自身储存电量消耗完毕之前，若控制模块132检测到电量显示按钮15被触发，则进入第二显示规则。进入第二显示规则后，若控制模块132检测到主开关16被导通，且在电量显示按钮15被释放前主开关16断开，则仍按照第二显示规则进行显示。进入第二显示规则后，若控制模块132检测到主开关16被导通，且在电量显示按钮15被释放后主开关16仍处于导通状态，则按照第一显示规则进行显示。可选的，第八显示规则还可以为，电池装置安装到电动工具本体的安装口后，进入第四规则。控制模块132记录显示单元14进行电量显示的时间，当未达到第一预设时间值时，若控制模块132检测到电量显示按钮15被触发，则进入第二显示规则。进入第二显示规则后，若控制模块132检测到主开关16被导通，且在电量显示按钮15被释放前主开关16断开，则仍按照第二显示规则进行显示。进入第二显示规则后，若控制模块132检测到主开关16被导通，且在电量显示按钮15被释放后主开关16仍处于导通状态，则按照第一显示规则进行显示。The present invention also provides an eighth display rule. Specifically, after the battery device is installed in the mounting port of the power tool body, it enters the third rule. Before the power consumption of the power supply module 12 itself is consumed, if the control module 132 detects that the power display button 15 is triggered, it enters a second display rule. After entering the second display rule, if the control module 132 detects that the main switch 16 is turned on and the main switch 16 is turned off before the power display button 15 is released, the display is still performed according to the second display rule. After entering the second display rule, if the control module 132 detects that the main switch 16 is turned on and the main switch 16 is still on after the power display button 15 is released, the display is performed according to the first display rule. Optionally, the eighth display rule may also be that after the battery device is installed in the mounting port of the power tool body, the fourth rule is entered. The control module 132 records the time when the display unit 14 performs power display. When the first preset time value is not reached, if the control module 132 detects that the power display button 15 is triggered, it enters the second display rule. After entering the second display rule, if the control module 132 detects that the main switch 16 is turned on and the main switch 16 is turned off before the power display button 15 is released, the display is still performed according to the second display rule. After entering the second display rule, if the control module 132 detects that the main switch 16 is turned on and the main switch 16 is still on after the power display button 15 is released, the display is performed according to the first display rule.
如前所述，电池装置11可以仅包括一个电池包110，也可以包括两个电池包110，还可以为三个甚至更多个电池包110。当电池装置11包括多个电池包110时，如图2，图3以及图7电路中所示的B+为第一个B+端子，B-为第一个 B-端子。在第一个B+与B-之间还设置了与电池包数量对应的多个B+及B-端子，电路上并未示出。以使得电动工具能与每一个电池包电性连接，并对多个电池包进行串联或并联组合。As mentioned above, the battery device 11 may include only one battery pack 110, may also include two battery packs 110, and may also be three or more battery packs 110. When the battery device 11 includes a plurality of battery packs 110, B + shown in the circuit of FIG. 2, FIG. 3, and FIG. 7 is the first B + terminal, and B- is the first B- terminal. A plurality of B + and B- terminals corresponding to the number of battery packs are also provided between the first B + and B-, which are not shown on the circuit. So that the power tool can be electrically connected to each battery pack, and multiple battery packs can be combined in series or in parallel.
当多个电池包110在电动工具本体上为之间相互并联时，如图2，图3以及图7电路中所示的B+与每一个电池包110的正极连接，B-与每一个电池包的负极连接。当任意一个电池包接入安装口时，即会触发供电模块12导通电池包与降压模块131之间的电性连接，控制模块132开始启动工作，并控制显示单元14进行电量显示。When multiple battery packs 110 are connected in parallel on the power tool body, as shown in the circuit of FIG. 2, FIG. 3 and FIG. 7, B + is connected to the positive pole of each battery pack 110, and B- is connected to each battery pack. The negative connection. When any battery pack is connected to the installation port, the power supply module 12 is triggered to conduct the electrical connection between the battery pack and the step-down module 131. The control module 132 starts the operation and controls the display unit 14 to display the power.
当电池装置11包括多个电池包110，且多个电池包110在电动工具本体上为之间相互串联时，如图2，图3以及图7电路中所示的B+连接第一个电池包110的正极，B-连接最后一个电池包的负极，中间位置的电池包在接入电动工具后，在电动工具上相互串联，并将串联后形成的正极与第一个电池包110的负极连接，串联后形成的负极与最后一个电池包的正极连接。具体的，当电池装置11包括两个电池包时，B+连接第一个电池包的正极，第二个电池包的正极连接第一个电池包的负极，第二个电池包的负极连接B-。再如，当电池装置11包括三个电池包时，B+连接第一个电池包的正极，第二个电池包的正极连接第一个电池包的负极，第二个电池包的负极连接第三个电池包的正极，第三个电池包的负极连接B-。在串联情况下，所有电池包均接入安装口才会触发供电模块12导通电池包与降压模块131之间的电性连接，控制模块132开始启动工作，并控制显示单元14进行电量显示。When the battery device 11 includes a plurality of battery packs 110 and the plurality of battery packs 110 are connected in series with each other on the power tool body, as shown in FIG. 2, FIG. 3 and FIG. 7, the first battery pack is connected to B +. The positive electrode of 110, B- is connected to the negative electrode of the last battery pack. After the battery pack in the middle position is connected to the power tool, they are connected in series on the power tool, and the positive electrode formed after the series connection is connected to the negative electrode of the first battery pack 110. The negative electrode formed after being connected in series is connected to the positive electrode of the last battery pack. Specifically, when the battery device 11 includes two battery packs, B + is connected to the positive pole of the first battery pack, the positive pole of the second battery pack is connected to the negative pole of the first battery pack, and the negative pole of the second battery pack is connected to B- . For another example, when the battery device 11 includes three battery packs, B + is connected to the positive pole of the first battery pack, the positive pole of the second battery pack is connected to the negative pole of the first battery pack, and the negative pole of the second battery pack is connected to the third The positive terminal of one battery pack is connected to the negative terminal of B-. In the case of series connection, all the battery packs are connected to the installation port to trigger the power supply module 12 to conduct the electrical connection between the battery pack and the step-down module 131. The control module 132 starts the work and controls the display unit 14 to display the power.
上述实施例中，安装于电动工具的安装口且给电动工具供电的装置，除了电池装置外，还可以为超级电容等其他能量存储装置。控制电机运转及显示单元的模块除可以为MCU控制模块外，还可以为DSP等控制模块。In the above embodiment, the device installed at the installation port of the power tool and supplying power to the power tool may be other energy storage devices such as a super capacitor in addition to a battery device. In addition to the MCU control module, the module that controls the motor operation and display unit can also be a control module such as a DSP.
以上描述的实施例仅表达了本发明的几种实施方式，由于文字表达得有限性，而在客观上存在无限的可能结构，对于本领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以作若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。The embodiments described above only express several implementations of the present invention. Due to the limited expression of the text, there are infinitely possible structures objectively. For a person skilled in the art without departing from the principles of the present invention, Under the premise, several improvements and retouches can also be made, and these improvements and retouches should also be regarded as the protection scope of the present invention. Therefore, the protection scope of the invention patent shall be subject to the appended claims.

Claims (15)

  1. 一种电动工具，其特征在于，包括：An electric tool, comprising:
    电机，从能量存储装置获取电能并旋转；A motor that obtains electrical energy from an energy storage device and rotates it;
    能量存储装置安装口，可选择地安装能量存储装置，以给所述电机提供电能，所述能量存储装置安装口包括正极端子和负极端子，分别与所述能量存储装置的正极输出端和负极输出端电性连接；An energy storage device installation port, which can optionally be installed to provide electrical energy to the motor. The energy storage device installation port includes a positive terminal and a negative terminal, which are respectively connected to the positive output terminal and the negative output of the energy storage device. Terminal electrical connection;
    供电模块，与所述正极端子电性连接，可选择地导通或断开所述正极端子与降压模块之间的电性连接；A power supply module electrically connected to the positive terminal, and selectively connecting or disconnecting the electrical connection between the positive terminal and the step-down module;
    降压模块，将能量存储装置的电压转换为适合于控制模块工作的工作电压；Step-down module, which converts the voltage of the energy storage device into a working voltage suitable for the control module;
    控制模块，从所述降压模块获得工作电压并启动工作，获取所述能量存储装置的电量信息，并根据所述电量信息向显示单元发送控制指令；The control module obtains an operating voltage from the step-down module and starts work, obtains power amount information of the energy storage device, and sends a control instruction to a display unit according to the power amount information;
    显示单元，接收所述控制模块的控制指令并显示所述能量存储装置的电量；A display unit, receiving a control instruction of the control module and displaying a power amount of the energy storage device;
    当所述能量存储装置安装到所述能量存储装置安装口时，响应于所述电池装置的正极输出端和负极输出端分别与所述正极端子和所述负极端子的连接，所述供电模块导通所述能量存储装置与所述降压模块之间的电性连接，所述控制模块获得工作电压并启动工作。When the energy storage device is mounted to the energy storage device mounting port, in response to the positive and negative output terminals of the battery device being connected to the positive and negative terminals, respectively, the power supply module Through the electrical connection between the energy storage device and the step-down module, the control module obtains a working voltage and starts working.
  2. 根据权利要求1所述的电动工具，其特征在于，所述供电模块包括连接在所述正极端子和所述负极端子之间的触发单元，以及设置在所述正极端子与降压模块之间且受所述触发单元控制的第一电子开关，当所述能量存储装置配接到所述能量存储装置安装口时，所述触发单元从所述能量存储装置的正极获得电压生成第一控制信号，所述第一控制信号输出给所述第一电子开关的控制端，控制所述第一电子开关导通，从而导通所述能量存储装置与所述降压模块之间的电性连接。The power tool according to claim 1, wherein the power supply module includes a trigger unit connected between the positive terminal and the negative terminal, and a trigger unit provided between the positive terminal and the step-down module and A first electronic switch controlled by the trigger unit, when the energy storage device is connected to the energy storage device mounting port, the trigger unit obtains a voltage from a positive electrode of the energy storage device to generate a first control signal, The first control signal is output to a control terminal of the first electronic switch, and controls the first electronic switch to be turned on, thereby conducting an electrical connection between the energy storage device and the step-down module.
  3. 根据权利要求2所述的电动工具，其特征在于，所述触发单元包括串联在所述正极端子和所述负极端子之间的第一电阻、第一电容以及第二电子开关，所述第二电子开关的控制端与所述第一电容电性连接，第二电子开关的输入端与所述第一电子开关的控制端电性连接，所述第二电子开关的输出端与所述负 极端子电性连接，当所述能量存储装置配接到所述能量存储装置安装口时，所述能量存储装置经所述第一电阻给所述第一电容充电，所述第二电子开关的控制端输入高电平，所述第二电子开关闭合，从而生成所述第一控制信号。The power tool according to claim 2, wherein the trigger unit comprises a first resistor, a first capacitor, and a second electronic switch connected in series between the positive terminal and the negative terminal, and the second The control terminal of the electronic switch is electrically connected to the first capacitor, the input terminal of the second electronic switch is electrically connected to the control terminal of the first electronic switch, and the output terminal of the second electronic switch is connected to the negative terminal. Electrical connection, when the energy storage device is connected to the energy storage device installation port, the energy storage device charges the first capacitor via the first resistor, and the control terminal of the second electronic switch When a high level is input, the second electronic switch is closed, thereby generating the first control signal.
  4. 根据权利要求1所述的电动工具，其特征在于，所述电动工具进一步包括电量显示按钮，所述电量显示按钮设置在所述电动工具的本体上，所述电量显示按钮的输入端电性连接所述正极端子，所述电量显示按钮的输出端电性连接所述降压模块，所述电量显示按钮可操作地被触发或释放，所述电量显示按钮被触发时，所述正极端子与所述降压模块之间的电性连接被导通，所述降压模块向所述控制模块提供工作电压。The electric tool according to claim 1, wherein the electric tool further comprises a power display button, the power display button is disposed on the body of the power tool, and an input end of the power display button is electrically connected The positive terminal, the output terminal of the power display button is electrically connected to the step-down module, the power display button is operatively triggered or released, and when the power display button is triggered, the positive terminal and the The electrical connection between the step-down modules is conducted, and the step-down module provides an operating voltage to the control module.
  5. 根据权利要求1所述的电动工具，其特征在于，所述电动工具进一步包括主开关，所述主开关串联连接在所述正极端子与所述电机之间，所述主开关可操作地处于导通或断开状态，当所述主开关导通时，所述正极端子与所述降压模块的电性连接被导通，所述降压模块向所述控制模块提供工作电压。The power tool according to claim 1, further comprising a main switch, the main switch being connected in series between the positive terminal and the motor, the main switch being operatively positioned at a conductive position In the on or off state, when the main switch is turned on, the electrical connection between the positive terminal and the step-down module is turned on, and the step-down module provides an operating voltage to the control module.
  6. 根据权利要求1-5任意一项所述的电动工具，其特征在于，所述控制模块启动工作后发出保持信号给所述供电模块，所述供电模块接收到所述保持信号后，持续导通所述正极端子与所述降压模块之间的电性连接。The electric tool according to any one of claims 1-5, wherein the control module sends a holding signal to the power supply module after starting the work, and the power supply module continues to conduct after receiving the holding signal. An electrical connection between the positive terminal and the step-down module.
  7. 根据权利要求6所述的电动工具，其特征在于，所述控制模块记录所述显示单元显示电量的持续时间，当所述持续时间达到第一预设时间值且所述主开关未导通，所述电量显示按钮未触发时，所述控制模块控制所述供电模块断开所述能量存储装置与所述降压模块之间的电性连接，所述显示单元停止显示电量。The electric tool according to claim 6, wherein the control module records the duration of the display unit's display of power, when the duration reaches a first preset time value and the main switch is not turned on, When the power display button is not triggered, the control module controls the power supply module to disconnect the electrical connection between the energy storage device and the step-down module, and the display unit stops displaying power.
  8. 根据权利要求7所述的电动工具，其特征在于，当所述持续时间未达到第一预设时间值，且控制模块检测到所述主开关由断开切换为导通时，所述控制模块持续发送保持信号给所述供电模块，且检测所述主开关的状态，当检测到所述主开关由导通切换为断开时，所述控制模块控制所述供电模块断开所述正极端子与所述降压模块之间的电性连接，所述显示单元停止显示电量。The electric tool according to claim 7, characterized in that when the duration does not reach the first preset time value and the control module detects that the main switch is switched from off to on, the control module Continuously sending a hold signal to the power supply module, and detecting the state of the main switch; when it is detected that the main switch is switched from on to off, the control module controls the power supply module to disconnect the positive terminal For the electrical connection with the step-down module, the display unit stops displaying power.
  9. 根据权利要求7所述的电动工具，其特征在于，当所述持续时间未达到 第一预设时间值，且控制模块检测到所述主开关处于断开状态，且所述控制模块检测到所述电量显示按钮被触发时，所述控制模块持续发送保持信号给所述供电模块，当检测到所述电量显示按钮由被触发切换为被释放时，以所述电量显示按钮被释放为起点进行计时，当所述计时超过第二预设时间值时，所述控制模块控制所述供电模块断开所述正极端子与所述降压模块之间的电性连接，所述显示单元停止显示电量。The electric tool according to claim 7, wherein when the duration does not reach the first preset time value, the control module detects that the main switch is in an off state, and the control module detects all When the power display button is triggered, the control module continuously sends a hold signal to the power supply module. When it is detected that the power display button is switched from being triggered to being released, the power display button is released as a starting point. Timing, when the timing exceeds a second preset time value, the control module controls the power supply module to disconnect the electrical connection between the positive terminal and the step-down module, and the display unit stops displaying power .
  10. 根据权利要求7所述的电动工具，其特征在于，当所述持续时间未达到第一预设时间值，所述控制模块根据能量存储装置传递的信息判断所述能量存储装置是否处于异常状态，当判断所述能量存储装置处于异常状态时，控制显示单元由显示电量的状态切换为显示能量存储装置处于异常的状态。The electric tool according to claim 7, wherein when the duration does not reach the first preset time value, the control module determines whether the energy storage device is in an abnormal state according to information transmitted by the energy storage device, When it is determined that the energy storage device is in an abnormal state, the control display unit is switched from a state in which the power is displayed to a state in which the energy storage device is in an abnormal state.
  11. 根据权利要求1所述的电动工具，其特征在于，所述能量存储装置安装口包括第一能量存储装置安装口和第二能量存储装置安装口，分别可选择地安装第一能量存储装置和第二能量存储装置，所述第一能量存储装置安装口与所述第二能量存储装置安装口串联连接，当所述第一能量存储装置安装到所述第一能量存储装置安装口，且所述第二能量存储装置安装到第二能量存储装置安装口时，所述供电模块导通所述能量存储装置与所述降压模块之间的电性连接。The power tool according to claim 1, wherein the energy storage device mounting port comprises a first energy storage device mounting port and a second energy storage device mounting port, and the first energy storage device and the first energy storage device are selectively mountable, respectively. Two energy storage devices, the first energy storage device installation port and the second energy storage device installation port are connected in series, when the first energy storage device is installed to the first energy storage device installation port, and the When the second energy storage device is installed in the second energy storage device installation port, the power supply module conducts the electrical connection between the energy storage device and the step-down module.
  12. 根据权利要求1所述的电动工具，其特征在于，所述能量存储装置安装口包括第一能量存储装置安装口和第二能量存储装置安装口，分别可选择地安装第一能量存储装置和第二能量存储装置，所述第一能量存储装置安装口与所述第二能量存储装置安装口并联连接，当所述第一能量存储装置安装到所述第一能量存储装置安装口，或所述第二能量存储装置安装到第二能量存储装置安装口时，所述供电模块导通所述能量存储装置与所述降压模块之间的电性连接。The power tool according to claim 1, wherein the energy storage device mounting port comprises a first energy storage device mounting port and a second energy storage device mounting port, and the first energy storage device and the first energy storage device are selectively mountable, respectively. Two energy storage devices, the first energy storage device mounting port is connected in parallel with the second energy storage device mounting port, and when the first energy storage device is mounted to the first energy storage device mounting port, or the When the second energy storage device is installed in the second energy storage device installation port, the power supply module conducts the electrical connection between the energy storage device and the step-down module.
  13. 根据权利要求11或12所述的电动工具，其特征在于，所述控制模块获取第一能量存储装置的电量以及第二能量存储装置的电量，并根据两者中较低的电量向所述显示单元发送控制指令，所述显示单元显示第一能量存储装置和第二能量存储装置中较低的电量。The electric tool according to claim 11 or 12, wherein the control module obtains the power of the first energy storage device and the power of the second energy storage device, and displays to the display according to the lower power of the two. The unit sends a control instruction, and the display unit displays a lower power amount in the first energy storage device and the second energy storage device.
  14. 根据权利要求11或12所述的电动工具，其特征在于，所述显示单元包 括第一显示单元和第二显示单元，所述第一显示单元显示第一能量存储装置的电量，所述第二显示单元显示第二能量存储装置的电量。The power tool according to claim 11 or 12, wherein the display unit comprises a first display unit and a second display unit, the first display unit displays the power of the first energy storage device, and the second The display unit displays the power of the second energy storage device.
  15. 根据权利要求1所述的电动工具，其特征在于，所述显示单元设置在所述能量存储装置安装口附近，并在使用者向所述能量存储装置安装口安装所述能量存储装置的状态下，所述显示单元朝向使用者。The power tool according to claim 1, wherein the display unit is disposed near the energy storage device mounting port, and in a state where a user installs the energy storage device to the energy storage device mounting port , The display unit faces the user.
PCT/CN2019/089626 2018-06-01 2019-05-31 Electric tool WO2019228519A1 (en)

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