CN109940561B - Electric tool and electric quantity display method thereof - Google Patents

Electric tool and electric quantity display method thereof Download PDF

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Publication number
CN109940561B
CN109940561B CN201711375587.4A CN201711375587A CN109940561B CN 109940561 B CN109940561 B CN 109940561B CN 201711375587 A CN201711375587 A CN 201711375587A CN 109940561 B CN109940561 B CN 109940561B
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electric quantity
display
battery pack
main control
control unit
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CN109940561A (en
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张煜
张宝全
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Positec Power Tools Suzhou Co Ltd
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Positec Power Tools Suzhou Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • 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

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Abstract

The application provides an electric tool and an electric quantity display method thereof. The electric tool includes: the battery packs are arranged in the mounting openings in a matched mode and used for providing electric energy for the electric tool; the main control unit is electrically connected to the battery assembly, the battery assembly provides driving electric energy for the main control unit, and the main control unit respectively estimates the electric quantity of the battery assembly according to the detected state information of the battery assembly and transmits the estimated information to the display unit; and the display unit is electrically connected to the main control unit, receives the estimated information transmitted by the main control unit and displays the electric quantity of each battery assembly in a time-sharing manner. Therefore, the user can clearly know the position of the battery pack and the current electric quantity of the battery pack, and when the electric quantity is insufficient, the battery pack with insufficient electric quantity is subjected to targeted electricity supplement, so that the user experience is improved.

Description

Electric tool and electric quantity display method thereof
Technical Field
The invention relates to the field of electric tools, in particular to an electric tool and an electric quantity display method thereof.
Background
At present, an energy storage type electric tool provides driving power through a battery assembly carried by the energy storage type electric tool, such as a mower and a grass cutter, but a single battery assembly (also called a battery pack) cannot meet power supply requirements in some occasions, and a mode of connecting (electrically connecting) two (or more) battery assemblies is often adopted to improve the overall power supply capacity, so that the working time and the working efficiency of the electric tool are improved. At present, the electric tool on the market is provided with a design scheme aiming at electric quantity display of two battery packs, and the electric tool is characterized in that the design scheme comprises the following steps:
the utility model provides a scheme, disposes the display element respectively to two battery pack, and the user can know the current electric quantity of battery pack through observing this display element during electric tool work, and this scheme leads to its with high costs because of having disposed 2 electric quantity display elements, reduces electric tool's competitiveness, and this scheme can not show the total electric quantity after 2 battery pack electric connection in addition.
In another scheme, only one display unit is configured for two battery packs, and when the electric tool is used, a user can know the total electric quantity after the 2 battery packs are electrically connected by observing the display unit, but the electric quantity of the battery packs cannot be displayed singly. Especially when the battery pack is indicated to be low in power, the user does not know which battery pack is low in power. The power supply can not be carried out in a targeted manner, and the user experience is reduced.
Disclosure of Invention
In order to solve the defects of the prior art, one of the purposes of the invention is as follows: the electric tool is provided with 1 electric quantity display unit which can display the electric quantity of 2 (or more) battery packs in a time-sharing manner or display the electric quantity of the 2 (or more) battery packs and the total electric quantity after the battery packs are electrically connected in a time-sharing manner. The user experience is improved.
In order to achieve the purpose, the invention adopts the following technical scheme: an electric power tool, characterized by comprising: the battery packs are arranged in the mounting openings in a matched mode and used for providing electric energy for the electric tool; the main control unit is electrically connected to the battery pack, the battery pack provides driving electric energy for the main control unit, and the main control unit respectively estimates the electric quantity of the battery pack according to the detected state information of the battery pack and transmits the estimated information to the display unit; and the display unit is electrically connected to the main control unit, receives the estimated information transmitted by the main control unit and displays the electric quantity of each battery assembly in a time-sharing manner.
Preferably, the electric tool further comprises an electric quantity display button, which is configured on the body of the electric tool and is electrically connected with the main control unit; the main control unit respectively estimates the electric quantity of the battery pack and the total electric quantity after the battery packs are connected according to the detected state information of the battery pack; and the main control unit receives an electric quantity display instruction triggered by the electric quantity display button, controls the display unit to respond to the electric quantity display instruction, and displays the electric quantity of a single battery assembly and the total electric quantity of the combined battery assemblies in a time-sharing manner according to a preset display rule.
Preferably, the electric tool further comprises an electric quantity display button, which is configured on the body of the electric tool and is electrically connected with the main control unit; the main control unit receives an electric quantity display instruction triggered by the electric quantity display button, controls the display unit to respond to the electric quantity display instruction, controls the display unit to display the electric quantity of the first battery pack in a time-sharing mode according to a preset display rule, and displays the electric quantity of the second battery pack.
Preferably, the display unit further includes: the position indicating module is electrically connected to the main control unit and comprises an indicating lamp, and the rule for lighting the position of the battery assembly corresponding to the indicating lamp is preset so as to indicate the position of the battery assembly; and the electric quantity module is electrically connected to the main control unit and used for receiving the information transmitted by the main control unit so as to display the electric quantity of the battery pack.
Preferably, the main control unit receives an electric quantity display instruction triggered by the electric quantity display button, controls an indicator lamp in the position indication module to be turned on, displays the position of a first battery pack corresponding to the indicator lamp according to a preset rule for turning on the indicator lamp, and the electric quantity module displays the electric quantity of the first battery pack; and the main control unit receives the instruction of displaying the electric quantity again, controls another indicator lamp in the indicator module to display so as to display the position of the second battery pack corresponding to the indicator lamp, and the electric quantity module displays the electric quantity of the second battery pack.
Preferably, the main control unit receives an electric quantity display instruction triggered by the electric quantity display button, controls an indicator lamp in the position indication module to be turned on, displays the position of a first battery pack corresponding to the indicator lamp according to a preset rule for turning on the indicator lamp, and the electric quantity module displays the electric quantity of the first battery pack; and controlling another indicator lamp in the position indication module to automatically light up after preset time so as to display the position of a second battery pack corresponding to the indicator lamp, wherein the electric quantity module displays the electric quantity of the second battery pack.
Preferably, the main control unit receives an electric quantity display instruction triggered by the electric quantity display button, controls an indicator lamp in the position indication module to be turned on, displays the position of a first battery pack corresponding to the indicator lamp according to a preset rule for turning on the indicator lamp, and the electric quantity module displays the electric quantity of the first battery pack; after preset time, controlling another indicator light in the position indicating module to automatically light up so as to display the position of a second battery pack corresponding to the indicator light, wherein the electric quantity module displays the electric quantity of the second battery pack; and controlling the indicator lamps in the position indication module to be fully lighted or not lighted at all through preset time, and displaying the total electric quantity after the first battery pack and the second battery pack are combined by the electric quantity module.
Preferably, the main control unit receives an electric quantity display instruction triggered by the electric quantity display button, controls an indicator lamp in the position indication module to be fully turned on or not turned on, and the electric quantity module displays the total electric quantity after the first battery assembly and the second battery assembly are combined; after preset time, controlling an indicator lamp in the position indicating module to be turned on, displaying the position of a first battery pack corresponding to the indicator lamp according to a preset rule for turning on the indicator lamp, and displaying the electric quantity of the first battery pack by the electric quantity module; and controlling another indicator lamp in the position indication module to automatically light up after preset time so as to display the position of a second battery pack corresponding to the indicator lamp, wherein the electric quantity module displays the electric quantity of the second battery pack.
Preferably, the position indication module displays the position of the battery assembly with low electric quantity in the first battery assembly and the second battery assembly, and the electric quantity module displays the low electric quantity in the first battery assembly and the second battery assembly.
Preferably, the power display button includes a button disposed on the body of the power tool and electrically connected to the main control unit.
Preferably, the power module comprises an indicator light for displaying the power of the battery pack.
Preferably, the number of the indicator lights for displaying the electric quantity of the battery assembly is 2-10.
Preferably, the indicator light comprises an LED indicator light, and when the electric quantity of the battery assembly is lower than a set threshold value, the LED indicator light gives an alarm prompt.
Preferably, the display unit includes: the display screen is electrically connected with the main control unit; the display screen further comprises: the position indication module is used for displaying the position of the battery pack corresponding to the position indication according to a preset display rule; and the electric quantity module is used for displaying the electric quantity of the battery pack at the position.
Preferably, the display unit is disposed on a surface of the power tool body between the mounting ports.
Preferably, the display unit is disposed in a handle region of the power tool body.
In addition, another embodiment of the present invention provides a method for displaying a charge level of a battery pack of an electric power tool, the electric power tool including: the battery packs are matched with the mounting ports of the body of the electric tool and used for providing electric energy for the electric tool; the main control unit is electrically connected to the battery assemblies and respectively estimates the electric quantity of the battery assemblies according to the detected state information of the battery assemblies; the display unit is electrically connected to the main control unit and used for receiving the electric quantity information transmitted by the main control unit; the method is characterized in that: the method comprises the following steps; the main control unit displays an instruction based on the received electric quantity; and controlling the display unit to respond to the instruction of electric quantity display and displaying the electric quantity of the battery pack in a time-sharing manner.
Preferably, the main control unit further includes, after receiving the power display instruction: the main control unit sends out a voltage information sampling instruction of the battery pack; and the main control unit receives voltage information fed back by responding to the sampling instruction based on the voltage signal port, respectively estimates the electric quantity of the battery pack, and transmits the estimated information to the display unit.
Preferably, the method comprises: the main control unit receives an electric quantity display instruction; controlling an indicator light in the position indication module to display, presetting a rule for lighting the position of the indicator light corresponding to the battery pack so as to display the position of a first battery pack corresponding to the indicator light, and displaying the electric quantity of the first battery pack by the electric quantity module; and the main control unit receives the instruction of displaying the electric quantity again, controls another indicator lamp in the indicator module to display so as to display the position of the second battery pack corresponding to the indicator lamp, and the electric quantity module displays the electric quantity of the second battery pack.
Preferably, the method comprises: the main control unit receives an electric quantity display instruction; the method comprises the steps that an indicator light in a position indicating module is controlled to display, a rule for lighting the position of the indicator light corresponding to a battery assembly is preset so as to display the position of a first battery assembly corresponding to the indicator light, and an electric quantity module displays the electric quantity of the first battery assembly; and after the preset time, another indicator lamp in the indicator module displays to display the position of the second battery pack corresponding to the indicator lamp, and the electric quantity module displays the electric quantity of the second battery pack.
Preferably, the position indicating module displays the position of the battery pack with low electric quantity in the first battery pack and the second battery pack; the power module displays a low power level in the first battery pack and the second battery pack.
Preferably, the main control unit estimates the total electric quantity after the connection of the plurality of battery packs according to the detected state information of the battery packs; the main control unit displays an instruction based on the received electric quantity; and controlling the display unit to respond to the instruction of electric quantity display, and displaying the electric quantity of the single battery pack and the total electric quantity of the combined battery packs in a time-sharing manner according to a preset display rule.
Compared with the prior art, the invention has the beneficial effects that: the invention provides an electric tool and an electric quantity display method thereof.A display unit is configured on the electric tool, and the display unit displays the electric quantity obtained by a battery pack or the total electric quantity after a plurality of (such as 2) battery packs are electrically connected in a time-sharing manner. Through the design, the product provided by the scheme of the invention has low cost and strong usability. When the electric tool is initially used, a user can clearly know the position of a battery pack carried by the electric tool and the current electric quantity of the battery pack; when the electric tool works, a user can clearly know the total electric quantity of a battery pack carried by the electric tool; when the electric quantity is insufficient, the targeted electricity supplementing is carried out on the battery pack with insufficient electric quantity according to the information prompted by the prompting display unit, and the user experience is improved.
Drawings
Fig. 1 is a schematic structural diagram of a functional module for displaying electric quantity of an electric tool according to an embodiment of the present invention;
FIG. 2 is a schematic view of a power tool according to an embodiment of the present invention;
FIGS. 3-6 are schematic structural diagrams of a display unit according to an embodiment of the invention;
FIG. 7 is a functional block diagram of the display unit of the embodiment shown in FIGS. 5 and 6;
description of the symbols:
in the case of the electric power tool 100,
a battery assembly 110,
Display units 120, 220, 320,
The electric tool body 130 is provided with a plurality of electric power receiving portions,
quantity of electricity display buttons 222, 323
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will recognize without departing from the spirit and scope of the present invention.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present or may be electrically connected to the other element. In the present embodiment, the "battery pack" is also referred to as a "battery pack".
In the embodiment of the present invention, the power display includes 2 stages:
an initial stage (power-on stage) when the electric tool does not start working and the user wants to know the current electric quantity of the battery pack; and a power tool working phase.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, a functional module structure of a power display of an electric tool 10 according to an embodiment of the present invention is shown.
The electric power tool 10 includes: a plurality of battery packs 11, a main control unit 12, a display unit 13;
a plurality of battery modules 11 mounted to a mounting hole (not shown) of the body of the power tool for supplying power to the power tool; the main control unit 12 is electrically connected to the battery assembly, the main control unit 12 detects the state information of the battery assembly 11, and estimates the electric quantity of the battery assembly according to the detected voltage information; the display unit 13 is electrically connected to the main control unit, receives the estimated information transmitted by the main control unit, and displays the electric quantity of each battery assembly in a time-sharing manner.
The main control Unit 12 may be a chip capable of processing instructions, such as an MCU (micro controller Unit), a single chip microcomputer, and the like, and has a plurality of I/O ports configured to receive/transmit instructions with different functions. The main control unit also has other control functions, controls a drive circuit (not shown) of the electric tool, and has: the device comprises a comparator module, an oscillator module, an AD conversion module, a DA conversion module, a PWM module and the like. The main control unit receives the electric quantity display instruction (also called as a signal) and controls the display unit to display according to a preset display mode.
In one embodiment, the main control unit 12 detects the state information of the battery assembly 11, estimates the electric quantity of the battery assembly according to the detected voltage information, that is, the estimated electric quantity of the battery assembly and the estimated total electric quantity after the plurality of battery assemblies are electrically connected, and the display unit 13 is electrically connected to the main control unit, receives the estimated information transmitted by the main control unit, and displays the electric quantity of each (also called a single) battery assembly and the total electric quantity after the plurality of battery assemblies are electrically connected in a time-sharing manner according to a preset display mode.
The electric quantity display instruction has different descriptions at different stages; at the initial stage, it can be described as: the main control unit receives an electric quantity display instruction (signal) triggered by the display button, or the battery pack is correctly installed on the electric tool, and the main control unit is powered on. During the working stage, the main control unit receives the electric quantity display instruction in real time (periodically).
Next, the power display operation of the battery pack of the power tool according to the above embodiment will be described with the power display button provided on the power tool body: an initial stage:
the main control unit receives an electric quantity display instruction triggered by the display button, controls the display unit to respond to the electric quantity display instruction, and displays the electric quantity according to a preset display rule.
In one embodiment, the main control unit receives an electric quantity display instruction triggered by the display button, and sends out a sampling instruction for respectively sampling voltage information of battery assemblies electrically connected with the main control unit, and receives voltage information fed back in response to the sampling instruction, estimates the electric quantity of the battery assemblies according to the fed voltage information (for example, the electric quantity of the battery assemblies is estimated by using the corresponding relation between the sampled voltage information and the pre-planned voltage-electric quantity (SOC)), and estimates the total electric quantity after the battery assemblies are connected (electrically connected) according to the preset electric connection mode among a plurality of (for example, 2, 3) battery assemblies (for example, 2, 3 battery assemblies are connected in series or in parallel). In this embodiment, the master control unit includes an (I/O) port for a battery pack voltage signal that matches the number of battery packs.
In one embodiment, after the battery pack is correctly installed on the electric tool body, the electric quantity display button is pressed, the main control unit receives an electric quantity display instruction triggered by the electric quantity display button, sends a voltage information sampling instruction of the battery pack, voltage information sampled by the sampling circuit is fed back to a voltage signal port of the battery pack of the main control unit, the main control unit estimates electric quantity of the battery pack according to the feedback voltage information and transmits the electric quantity information to the display unit, and the display unit receives the electric quantity information transmitted by the main control unit and displays the electric quantity of the first battery pack, the electric quantity of the second battery pack and the total electric quantity after the battery packs are connected (electrically connected) in a time sharing mode according to a preset program module.
In one embodiment, if the power tool is not configured with the power display button, the main control unit performs power estimation and power display of the battery assembly when the power tool is powered on. That is, (the battery pack is correctly mounted to the electric tool, and when the main control unit is powered on, the main control unit receives a power supply signal (also referred to as an electric quantity display command), the main control unit sends out sampling commands for respectively sampling voltage information of the battery pack electrically connected to the main control unit, receives voltage information fed back in response to the sampling commands, and estimates the electric quantity of the battery pack according to the fed-back voltage information.
When the electric tool 10 works, the main control unit receives the electric quantity display instruction in real time, at this time, the port of the voltage signal of the main control unit receives the voltage signal fed back by sampling in real time (or periodically, with an interval depending on the application), and estimates the electric quantity of the battery pack, the total electric quantity after the battery pack is connected (electrically connected) is estimated according to the preset electrical connection mode among the battery packs, and the total electric quantity is transmitted to the display unit, and the display unit displays and receives the electric quantity information and displays the electric quantity information.
In the above scheme, if the electric tool adopts 2 battery packs, the port of the main control unit correspondingly configured with 2 battery pack voltage signals respectively receives the sampled and fed back voltage information of the 2 battery packs (for example, the port 1 receives the voltage information of the first battery pack, and the port 2 receives the voltage information of the second battery pack), so that the position of the battery pack on the electric tool body can be identified. The specific implementation manner is not limited herein, so that the first battery pack/the second battery pack can be distinguished and identified through the predefined I/O port. The sampling circuit samples voltage information of the battery pack, and the voltage information is transmitted to an I/O port of a predetermined main control unit after signal processing (such as denoising, amplification and AD conversion).
In the above embodiments, the main control unit estimates the electric quantity according to the voltage of the battery pack electrically connected to the main control unit. During sampling, the voltage of the battery pack is sampled by using the sampling circuit, and the sampled signal is converted into a readable signal by the main control unit and is transmitted to a preset port of the main control unit. In some embodiments, a BMS module (also called a control board) configured in the battery pack may be further used, the BMS module is used to detect voltage information of each cell in the battery pack and feed the voltage information back to a predetermined port of the main control unit, and the main control unit estimates the electric quantity of the battery pack according to the received state information of the cells and a predetermined electrical connection manner of the cells.
The proposed embodiment of the present invention will be described with respect to an electric tool having 2 battery modules (also referred to as 2 battery packs, each battery module includes a plurality of battery chips, which are electrically connected according to a certain rule, and each battery module has a MAX voltage of 12V (connection type: 3S1P, 3S2P, etc.), 16V, 20V, 24V, etc., and is not limited herein, particularly, for application of the electric tool.
Fig. 2 is a schematic structural diagram of an electric power tool 100 according to an embodiment of the present invention. The electric power tool 100 includes: a power tool body 130; a mounting opening 110a configured on the electric tool body 130 for matching and mounting the battery pack; the main control unit (not shown) is disposed inside the body 130 of the electric tool; the 2 battery components 110 are respectively installed in the matched installation openings 110a in a pluggable manner and provide electric energy for the electric tool after being electrically connected; the display unit 120 is electrically connected to the main control unit; the main control unit estimates the electric quantity information of the battery assembly based on the sampled state information of the battery assembly 110 and transmits the electric quantity information to the display unit; the display unit 120 receives and displays the power information sent by the main control unit.
Wherein, the 2 battery packs 110 are respectively mounted on the mounting openings of the electric tool body 130 (for example, the battery packs are mounted on the body in a snap-fit manner). The battery modules 110 are disposed on both sides of the handle region of the electric power tool body (2 battery modules 110 may be disposed on one side). An auxiliary handle may be provided in the body of the power tool body 130 to facilitate the user's work with the power tool. The control unit of the embodiment utilizes the sampling circuit to sample the voltage of the electrically connected battery pack. The estimation action is the same as above and is not repeated here.
Fig. 3 is a schematic structural diagram of a display unit of an electric tool according to an embodiment of the present invention; the display unit 220, an electrical main control unit, includes: the electric quantity module 221, the main control unit receives an electric quantity display instruction (i.e. an electric quantity display instruction triggered by the electric quantity display button), controls the display unit to respond to the electric quantity display instruction, and displays the total electric quantity after the battery pack is connected (electrically connected) according to a preset display rule. In this embodiment, the total power after the electrical connection between the 2 battery modules is displayed. Specifically, when a user presses an electric quantity display button (not shown) arranged on the electric tool body, the main control unit receives an electric quantity display instruction triggered by the electric quantity display button and sends a voltage information sampling instruction of the battery pack, and a voltage signal port of the main control unit receives voltage information fed back by responding to the sampling instruction and estimates the electric quantity of the battery pack according to the fed-back voltage information; estimating the total electric quantity after the battery components are connected (electrically connected) according to a preset electrical connection mode among 2 battery components; and transmitting the estimated electric quantity information to a display unit, and controlling the display unit to receive and display the estimated electric quantity information (displaying the total electric quantity after the 2 battery assemblies are electrically connected). At an initial stage, the user knows the charge of the battery pack.
When the electric tool is working, the electric quantity module 221 displays the total electric quantity after the 2 battery assemblies are electrically connected in real time.
The main control unit of the above embodiment utilizes the sampling circuit to sample the voltage of the electrically connected battery assembly. The power module 221 includes a plurality of LED indicators. The specific LED indicating lamps that include, the lighting rule that can predetermine (if according to the voltage information of the battery pack that detects, set for the quantity of lighting of pilot lamp), the quantity of lighting the LED pilot lamp reflects the total electric quantity after 2 present battery packs electric connection (if 2 battery packs electric connection in series, total electric quantity shows for the electric quantity that the battery pack that voltage is low corresponds between 2 battery packs). If the electric quantity module 221 includes 3 LED indicator light combinations (taking MAX voltage of the battery pack 20V as an example, if the detected voltage of the battery pack is greater than 20V, 3 LEDs are fully on; when the detected voltage of the battery pack is greater than 18.5V, 2 LEDs are on; and when the detected voltage of the battery pack is greater than 16V, 1 LED is on); or other number of LED indicator light combinations or other analog display number indicators (e.g., designed as a cylindrical battery, with filled shading to indicate power). Not enumerating here one by one, can realize the purpose of this scheme can, that is the user can know current battery pack electric connection's electric quantity through looking over the electric quantity module can. The control unit of the present embodiment samples the voltage of the battery assembly and estimates the voltage, which is the same as above and will not be repeated here.
In the above embodiment, if the power of the battery pack is lower than a predetermined threshold (e.g., 16V), the lighted indicator lamp in the power module prompts an alarm message (e.g., the lamp flashes; the indicator lamp displays a striking color, depending on the application).
Fig. 4 is a schematic structural diagram of a display unit of an electric power tool according to an embodiment of the present invention. : the display unit 220 includes: a power module 221 and a power display button 222. The power display button 222 is integrated with the display unit 220, which is different from the scheme of fig. 3. In the embodiment of fig. 3, the charge display button is disposed on the power tool body (not shown). In this embodiment, the control unit samples the voltage of the electrically connected battery pack by using the sampling circuit. The estimation action is the same as above and is not repeated here.
When the electric tool 100 is in operation, the display unit displays the total power after the 2 battery packs are electrically connected (electrically connected) in real time without pressing a power display button.
Next, referring to fig. 5, fig. 6, and fig. 7, the electric tool is equipped with 2 battery packs, and the display unit of the electric tool displays the positions of the battery packs and the corresponding battery pack power levels.
Fig. 5 is a schematic structural diagram of a display unit of an electric tool according to an embodiment of the present invention. The display unit 320 includes a power module 321, a position indication module 322; the position indicating modules comprise indicating lamps, wherein the positions of the lightening indicating lamps corresponding to the battery assemblies are preset (the lightening of one indicating lamp represents the preset position of the battery assembly) so as to indicate the positions of the battery assemblies; the power module 321 is used for displaying the power of the battery assembly. In this embodiment, the position indication module 322 includes a first indicator light and a second indicator light, and by presetting: a first indicator lamp in the position indicating module lights a first battery pack corresponding to the electric tool body, and the electric quantity module displays the electric quantity of the first battery pack; a second indicating lamp in the position indicating module lights a second battery pack corresponding to the electric tool body, and the electric quantity module displays the electric quantity of the second battery pack. When the power supply is used, the main control unit receives a power display instruction (namely receives the power display instruction triggered by the power display button), controls the display unit to respond to the power display instruction, and displays the position and the power of the first battery pack and the position and the power of the second battery pack in a time-sharing manner according to a preset display rule. Thus, the user can know the electric quantity of the battery pack carried by the electric tool at the beginning of use of the electric tool. If the battery pack has insufficient electric quantity, the battery pack with insufficient electric quantity can be subjected to targeted power supplement according to the information of the position indication prompt. Therefore, through the design of one display unit, the electric quantity of a single battery pack can be displayed in a time-sharing manner. The user experience can be further improved.
In one embodiment, the main control unit receives the power display instruction, the main control unit sends a voltage information sampling instruction of the battery assembly electrically connected to the main control unit, a port of a voltage signal of the main control unit receives voltage information fed back in response to the sampling instruction, estimates the power of the battery assembly according to the fed back voltage information, and transmits the estimated power information of the battery assembly to the display unit, one indicator (e.g., a first indicator) in the position indication module 322 is turned on, the position of the first battery assembly corresponding to the turned-on indicator is displayed according to a preset display rule, and the power module 321 displays the power of the first battery assembly; after a predetermined time (e.g., 1S, 2S, 3S, 4S, 5S, etc., and depending on the application, the time interval may be predetermined), another indicator light (e.g., a second indicator light) in the position indication module 322 is turned on (automatically switched to) to display the position of the second battery pack corresponding to the turned-on indicator light, and the power module 321 displays the power of the second battery pack. Thus, the user can know the electric quantity of the battery pack carried by the electric tool at the beginning of use of the electric tool. If one of the battery packs is insufficient in electric quantity, the battery packs with insufficient electric quantity can be subjected to targeted power supplement according to the information prompted by the position indication. The user experience can be further improved.
In the above embodiment, as shown in fig. 7, the main control unit 12 configures 2 ports for voltage signals, and uses the voltage information of the first battery pack through the first sampling circuit, and uses the voltage information of the second battery pack through the second sampling circuit, and the sampled voltage information is fed back to the corresponding port. The main control unit 12 estimates the electric quantity of the first battery pack and the electric quantity of the second battery pack based on the fed-back voltage information.
In one embodiment, the main control unit 12 estimates the electric quantity of the first battery pack and the electric quantity of the second battery pack respectively based on the fed back voltage information, and estimates 2 the total electric quantity after the battery packs are connected (electrically connected) based on a preset electrical connection mode.
In one embodiment, the main control unit receives the electric quantity display instruction, and controls the display unit to display the electric quantity of the first battery assembly, the electric quantity of the second battery assembly, and the total electric quantity after the first battery assembly and the second battery assembly are electrically connected. Specifically, the main control unit receives the power display instruction, the main control unit sends a voltage information sampling instruction of the battery assembly electrically connected to the main control unit, a port of a voltage signal of the main control unit receives voltage information fed back in response to the sampling instruction, estimates the power of the battery assembly according to the fed back voltage information, and transmits the estimated power information of the battery assembly to the display unit, one indicator lamp in the position indication module 322 is turned on (e.g., a first indicator lamp), the position of the first battery assembly corresponding to the turned-on indicator lamp is displayed according to a preset display rule, and the power module 321 displays the power of the first battery assembly; after a preset time (e.g., 1S, 2S, 3S, 4S, 5S, etc., and depending on the application, the time interval may be preset), another indicator light (e.g., a second indicator light) in the position indication module 322 is turned on (automatically switched to) to display the position of the second battery pack corresponding to the turned-on indicator light, and the power module 321 displays the power of the second battery pack; after a predetermined time, all the indicator lights in the position indication module are turned on (or all the indicator lights are turned off, specifically depending on the application scenario), and the electric quantity module 321 displays the total electric quantity after the first battery assembly and the second battery assembly are electrically connected. Of course, the display unit displays the electric quantity of a single battery pack, and the sequence of the total electric quantity after the battery packs are electrically connected can be adjusted (for example, the total electric quantity after the battery packs are electrically connected is displayed first, and then the electric quantity of a single battery pack is displayed in time). Thus, the user can know the electric quantity of the battery pack carried by the electric tool at the beginning of use of the electric tool. Therefore, through the design of one display unit, the electric quantity of a single battery pack and the total electric quantity after the battery packs are electrically connected can be displayed in a time-sharing manner. The user experience can be further improved.
If one of the battery packs is insufficient in electric quantity, the battery packs with insufficient electric quantity can be subjected to targeted electricity supplementing according to the information prompted by the position indication. The user experience can be further improved.
In the above embodiment, the indicator lamps in the position indication module are electrically connected to the main control unit, the main control unit identifies the battery pack sampled by the main control unit according to the voltage information fed back from the voltage port (i.e., according to a predetermined display rule, if one indicator lamp (e.g., the first indicator lamp) in the position indication module is turned on, the first battery pack is indicated to be located at the position of the electric tool body, if another indicator lamp (e.g., the second indicator lamp) in the position indication module is turned on, the second battery pack is indicated to be located at the position of the electric tool body. In the above embodiment, the display manner of the indicator light of the power module is the same as that of the schemes in fig. 3 and 4, and the description is not repeated here.
In one embodiment, the electric tool carries 2 battery packs, the 2 battery packs are respectively installed on two sides of the electric tool body, the electric quantity of the battery pack on the left side is displayed firstly by default when the electric quantity is displayed, the electric quantity display button is pressed again after a preset time, then the battery pack on the right side is displayed, and the position indication module can be omitted. The display of the battery pack in this scheme (first displaying the electric quantity of the battery pack on the left side, and then displaying the battery pack on the right side means that the electric tool can be set by other users in actual use, and the user can know and distinguish the electric tool in advance). The display mode of the indicator light of the power module is the same as that of the schemes in fig. 3 and 4, and the description is not repeated.
In one embodiment, the main control unit receives an electric quantity display instruction triggered by an electric quantity display button and sends a voltage information sampling instruction of the battery assembly; a port of a voltage signal of the main control unit receives feedback voltage information sampled by the sampling circuit, estimates the electric quantity of the battery assembly according to the feedback voltage information, and transmits the estimated electric quantity information of the battery assembly to the display unit; one indicator lamp in the position indicating module is lightened to display the position of a battery assembly (such as a first battery assembly), and the electric quantity module displays the electric quantity of the battery assembly; the main control unit receives the electric quantity display instruction again (for example, the user triggers the electric quantity display button again), another indicator lamp in the position indication module of the electric quantity display button is responded to light up and display the position of another battery assembly (for example, a second battery assembly), and the electric quantity module displays the electric quantity of the battery assembly. The display mode of the indicator light of the power module is the same as that of the schemes in fig. 3 and 4, and the description is not repeated. Thus, the user can know the electric quantity of the battery pack carried by the electric tool at the beginning of use of the electric tool. If one of the battery packs is insufficient in electric quantity, the battery packs with insufficient electric quantity can be subjected to targeted power supplement according to the information prompted by the position indication. The user experience can be further improved.
Fig. 6 is a schematic structural diagram of a display unit of an electric power tool according to an embodiment of the present invention. The display unit 320 also includes a power display button position 323. The difference from the solution of fig. 5 is that a power display button 323 is arranged in the area of the display unit 320. In the solution of fig. 5, the power display button is disposed on the power tool body. The action of the position indication module is the same as that of the scheme in fig. 5, and is not repeated here. The display mode of the indicator light of the power module is the same as that of the schemes in fig. 3 and 4, and the description is not repeated.
In the above embodiment:
in the design of the display unit, as a variation of the embodiments shown in fig. 5 and 6, when the display unit displays the electric quantity for the first time, the electric quantity module preferentially displays the electric quantity of the battery pack with lower electric quantity (among the 2 battery packs), and the indicator lamp in the position indication module displays the position of the corresponding battery pack according to a predetermined display rule (that is, the display unit preferentially displays the battery pack with lower electric quantity and the position where the battery pack is located). In other embodiments, the display unit does not set a condition for preferentially displaying the battery pack position with the lower electric quantity of the battery pack and the corresponding electric quantity.
In the design of the power display button, as an improvement of the embodiment of fig. 5 and 6, a selection switch button is further disposed outside the power display button and electrically connected to the main control unit; the selection switch button is disposed near the display unit. At this time, pressing the power display button is equivalent to activating the power display function, and the main control unit receives the power display instruction (that is, the main control unit receives a signal that the selection switch button is triggered), and controls the display unit to display the power according to a preset display rule. Specifically, the main control unit receives an electric quantity display instruction; the main control unit respectively estimates the electric quantity of the battery pack according to feedback voltage information which is received by a port of the voltage signal and responds to a sampling instruction (sampled by a sampling circuit); controlling an indicator lamp in the position indicating module to be lightened to indicate the position of a preset first battery pack, and displaying the electric quantity of the first battery pack by the electric quantity module; the main control unit receives the electric quantity display instruction again (presses the selection switching button), responds to the instruction, controls another indicator lamp in the position indication module to be lightened so as to indicate the preset position of the second battery pack, and controls the electric quantity module to display the electric quantity of the second battery pack. In one embodiment, the main control unit receives the power display command again by replacing the preset time with the preset time (e.g., 1S, 2S, 3S, etc., without limitation, as long as the unit displays information corresponding to the action by pressing the selection button). The control unit of the embodiment utilizes the sampling circuit to sample the voltage of the electrically connected battery pack. The estimation action is the same as above and is not repeated here.
In the design of the display unit, the display unit comprises an electric quantity module which is electrically connected with the main control unit and used for receiving and displaying the estimation information transmitted by the main control unit.
In the design of the display unit, one display unit is adopted, and the electric quantity of the plurality of battery assemblies can be displayed in a time-sharing manner, or the electric quantity of the plurality of battery assemblies and the total electric quantity electrically connected with the plurality of battery assemblies can be displayed in a time-sharing manner.
In the design of the display unit, the display unit comprises a position indicating module for displaying the position of the battery assembly, the position indicating module comprises indicating lamps, the indicating lamps are respectively electrically connected with the main control unit, the rule for lighting the position of the battery assembly corresponding to the indicating lamps is preset so as to display the preset position of the battery assembly (namely, an indicating lamp in the predefined position indicating module is displayed (lighted) to indicate the preset position of the battery assembly; an electric quantity module is electrically connected with the main control unit and is used for displaying the electric quantity of the battery assembly corresponding to the indicating position; in the embodiment shown in figure 5 or 6, the indicating lamps are designed into an arrow head shape, one side (the arrow head is roughly leftwards) of the position indicating module (in the embodiment, the position indicating lamp can only display one side, namely, when one side is lighted, the indicating lamp on the other side) is lighted, and represents the first battery assembly located at the preset position of the electric tool body, the indicator light on the other side (the arrow is approximately rightward) represents a second battery pack located at a preset position of the electric tool body; and the electric quantity module is used for displaying the electric quantity of the battery pack corresponding to the indication position. The position indicating module and the electric quantity module comprise indicating lamps; the number of the indicating lamps used for displaying the position indicating module is 2 or more; the number of the indicating lamps for displaying the electric quantity of the battery pack corresponding to the identified position of the battery pack is 2-10.
In the design of the display unit, the display unit comprises a position indicating module for displaying the position of the battery pack, wherein the position indicating module comprises a first indicating lamp and a second indicating lamp; the first indicator light or the second indicator light may be composed of a number of LEDs.
In the design of the display unit, the display unit includes a position indication module that displays the position of the battery assembly, the position indication module including an indicator light. The position indication module is arranged at a preset position of the electric tool body, and a layer of symbols and/or letters/Chinese characters with position indication are covered on the indication lamps, so that a user can easily identify the position of the corresponding battery pack according to the illuminated indication lamps in the position indication module.
In the design of the display unit, the position information of the battery pack indicated by the position indication module (i.e., the position of the battery pack in the power tool body) is set based on a predefined port (also referred to as an I/O port) of the main control unit. Or, the position indication module is used for identifying and indicating the position of the battery pack based on the identification module, specifically, the identification module can be an identification resistor which is configured at a mounting opening of the electric tool body and matched with the battery pack; the memory can also be a memory with a memory function, and the memory is configured at the mounting port.
In the design of the display unit, the display unit can also be a display screen, and the display screen comprises a position indication module for displaying the position of the battery pack and an electric quantity module for displaying the electric quantity of the battery pack. The position indication module is used for displaying the position of the corresponding battery pack according to a preset display rule; and the electric quantity module is used for displaying the electric quantity of the battery pack. In this scheme, the main control unit can distinguish the battery pack based on the predefined correspondence between the ports (also referred to as I/O ports) and the battery pack. Through the preset position of the battery pack on the body, the main control unit can distinguish the battery packs at different positions. In one embodiment, the power display button is integrated into the display screen. The display screen adopts the realization forms of LCD, TFT, OLED and the like. When the display screen displays the electric quantity of the battery pack (the electric quantity estimation action is the same as above, and is not repeated here, taking 2 battery packs as an example), the display screen can display the electric quantity in one picture: total electric quantity after 2 battery packs are connected (electrically connected); or 2 total electric quantity after the battery components are connected (electrically connected) and the position indication module and the electric quantity module respectively display the position information of the battery components; or the position indication module displays the position information of the battery pack, and the electric quantity module displays the electric quantity of the battery pack. The display form of the electric quantity module can adopt a digital percentage form to display (namely, the percentage of the electric quantity estimated by the main control unit to the rated electric quantity); a scale simulation mode can also be adopted; the user only needs to know the electric quantity of the current electric tool by looking up the display unit.
In the design of the display unit, the electric tool displays the total electric quantity after the battery pack is electrically connected when working; without having to press the power display button.
In the design of the display unit, if the electric tool is abnormal, the display unit can also give out an alarm prompt, such as: motor abnormality, control board abnormality, battery pack abnormality (e.g., the voltage of the battery pack is below a set threshold), and the like.
In the design of the display unit, the position of the display unit is arranged on the surface of the body between the mounting ports (see fig. 2). Alternatively, the display unit is disposed near the handle area so that the user can initially know the current charge level of the battery pack; when the electric tool works, a user can easily check the content displayed by the unit in real time to know the current electric quantity of the battery pack. Further, the working time of the electric tool can be evaluated according to experience. Alternatively, the electric power tool body is further provided with an assist grip, and the display unit is disposed in the vicinity of the assist grip region. Thus, the user can know the current electric quantity of the battery pack at the beginning; when the electric tool works, a user can easily check the content displayed by the unit in real time to know the current electric quantity of the battery pack. Further, the working time of the electric tool can be evaluated according to experience.
In the design of the electric quantity display button, the electric quantity display button is arranged on the surface of the body between the mounting openings. And may also be disposed adjacent the handle of the body. The power display button is electrically connected to the main control unit, the main control unit receives the power display instruction (that is, the main control unit receives the power display instruction triggered by the power display button, and the triggered power display instruction can be described as being pressed or effectively pressed), and the control display unit responds to the signal and displays the power. The electric quantity display button can adopt a mechanical button switch, a touch switch, an infrared sensor and the like. The pressing of the power display button provided on the power tool body by the user may be understood as one time of pressing the button, pressing the button and maintaining the set time (such as 1S, 2S, 3S, etc.), which is not limited herein, as long as the display corresponding to the action can be displayed by pressing the power display button display unit.
In the design of the battery assembly, 2 battery assemblies are used as an example in the above embodiment, and the present invention may be extended to an electric power tool using a plurality of (e.g., 3, 4, etc.) battery assemblies.
In the above embodiments, the electric tool may be a lawn mower, a pruner, a blower, etc., and may be extended to other kinds of electric tools. The above features are applied in combination without conflict in the use of the power tool.
Next, a method for displaying the amount of power of the electric power tool proposed by the present invention will be described with reference to fig. 1.
The power tool 10 of the method includes: a plurality of battery packs 11, a main control unit 12, a display unit 13;
the battery packs 11 are matched with the mounting ports of the body of the electric tool and are mounted in the mounting ports of the body of the electric tool so as to provide electric energy for the electric tool; a main control unit 12 electrically connected to the battery assembly; a display unit 13(1 display unit) electrically connected to the main control unit 12 for receiving the electric quantity information transmitted by the main control unit 12; the method comprises the following steps: the main control unit 12 displays an instruction based on the received electric quantity; and controlling the display unit 13 to respond to the instruction of displaying the electric quantity, and displaying the electric quantity of each battery assembly in a time-sharing manner.
Specifically, the power tool 10 of the method includes: a plurality of battery packs 11, a main control unit 12, a display unit 13; the battery packs 11 are matched with the mounting ports of the body of the electric tool and are used for providing electric energy for the electric tool; a main control unit 12 electrically connected to the battery assembly; the display unit 13 is electrically connected to the main control unit 12, and receives the electric quantity information transmitted by the main control unit 12; the method comprises the following steps: the main control unit 12 sends a voltage information sampling instruction of the battery pack based on the received electric quantity display signal by the main control unit 12; the main control unit 12 respectively estimates the electric quantity of the battery pack based on the voltage information fed back by the response sampling instruction received by the voltage signal port, and transmits the estimated information to the display unit 13; the display unit 13 displays the electric quantity of each battery pack in a time-sharing manner in response to the electric quantity display instruction.
Specifically, the power tool 10 of the method includes: a plurality of battery packs 11, a main control unit 12, a display unit 13; the battery packs 11 are matched with the mounting ports of the body of the electric tool and are used for providing electric energy for the electric tool; a main control unit 12 electrically connected to the battery assembly; the display unit 13 is electrically connected to the main control unit 12, and receives the electric quantity information transmitted by the main control unit 12; the method comprises the following steps: the main control unit 12 sends a voltage information sampling instruction of the battery pack based on the received electric quantity display signal by the main control unit 12; the main control unit 12 respectively estimates the electric quantity of the battery pack and the total electric quantity after the connection of the plurality of battery packs based on voltage information fed back by the response sampling instruction received by the voltage signal port, and transmits the estimated information to the display unit 13; the display unit 13 responds to the electric quantity display instruction, and displays the electric quantity of each battery assembly and the total electric quantity of the battery assemblies after combination in a time-sharing manner.
In the implementation method, the main control unit sends out a voltage information sampling instruction of the battery assembly after receiving the electric quantity display signal, and the voltage information of the battery assembly sampled by the sampling circuit is fed back to the voltage signal port.
In the above embodiment, if 2 battery modules are adopted, the battery modules may be referred to as a first battery module and a second battery module; the display unit 13 displays the electric quantity of the first battery pack and the electric quantity of the second battery pack in a time-sharing manner.
In one embodiment, the master control unit includes a voltage information port that matches a corresponding battery pack.
In one embodiment, after a battery pack is correctly mounted on a mounting port (also called a battery interface) of an electric tool, a user presses an electric quantity display button, a main control unit receives an electric quantity display instruction triggered by the electric quantity display button and sends a voltage information sampling instruction of the battery pack, and a preset voltage information port (I/O port) of the main control unit receives feedback sampled voltage information, estimates electric quantity of the battery pack respectively and transmits the electric quantity to a display unit; and controlling the display unit to display the electric quantity according to a preset display program. The main control unit is provided with driving power by a battery assembly (a single battery assembly or a plurality of battery assemblies after being electrically connected).
In one embodiment, the method for displaying the electric quantity includes:
in the embodiment as illustrated in fig. 3 and 4, the charge display represents the total charge after the 2 battery assemblies are electrically connected. When the electric tool works, the main control unit receives the electric quantity display instruction in real time and controls the display unit to display the total electric quantity after the 2 battery packs are electrically connected in real time. Specifically, at the initial power-on time of the power tool (at this time, the power tool does not start to operate), the power display unit displays the combined power of the battery pack. The display unit 220, the electrical main control unit, includes: a power module 221; the main control unit receives an electric quantity display instruction (namely, the electric quantity display instruction triggered by the electric quantity display button), controls the display unit to respond to the electric quantity display instruction, and displays the total electric quantity after the battery pack is connected (electrically connected) according to a preset display rule. In this embodiment, a user presses an electric quantity display button (not shown) disposed on the electric tool body, the main control unit receives an electric quantity display instruction triggered by the electric quantity display button and sends a voltage information sampling instruction of the battery pack, and a voltage signal port of the main control unit receives voltage information fed back in response to the sampling instruction and estimates the electric quantity of the battery pack according to the fed-back voltage information; estimating the total electric quantity after the battery components are connected (electrically connected) according to a preset electrical connection mode among 2 battery components; and transmitting the estimated electric quantity information to a display unit, and receiving and displaying the estimated electric quantity information by the display unit (displaying the total electric quantity after the 2 battery assemblies are electrically connected). Thus, at the initial stage, the user knows the charge of the battery pack. When the electric tool works, the main control unit receives the electric quantity display instruction in real time and controls the display unit to display the total electric quantity after the 2 battery packs are electrically connected in real time.
In one embodiment, the method for displaying the electric quantity includes:
in the embodiment described in fig. 5 and 6, the charge display shows the charge of 2 battery packs in a time sharing manner; when the power tool is powered on initially (not working at the moment), the electric quantity display unit displays the electric quantity and the corresponding position of each battery pack respectively. The display unit includes: the device comprises a position indication module for displaying the position of the battery pack and an electric quantity module for displaying the electric quantity of the battery pack. Specifically, the main control unit receives an electric quantity display instruction, controls an indicator lamp in the position indication module to display, presets a rule for lighting the position of the indicator lamp corresponding to the battery assembly so as to display the position of the first battery assembly corresponding to the indicator lamp, and the electric quantity module displays the electric quantity of the first battery assembly; and the main control unit receives the instruction of displaying the electric quantity again, controls another indicator lamp in the indicator module to display so as to display the position of the second battery pack corresponding to the indicator lamp, and the electric quantity module displays the electric quantity of the second battery pack. Take 2 battery packs as an example. The display unit 320 includes a power module 321, a position indication module 322; the position indicating modules comprise indicating lamps, wherein the positions of the lightening indicating lamps corresponding to the battery assemblies are preset (the lightening of one indicating lamp represents the preset position of the battery assembly) so as to indicate the positions of the battery assemblies; the power module 321 is used for displaying the power of the battery assembly. In this embodiment, the position indication module 322 includes a first indicator light and a second indicator light, and by presetting: a first indicator lamp in the position indicating module lights a first battery pack corresponding to the electric tool body, and an electric quantity module displays the electric quantity of the first battery pack; a second indicating lamp in the position indicating module lights a second battery pack corresponding to the electric tool body, and the electric quantity module displays the electric quantity of the second battery pack. When the power supply is used, the main control unit receives a power display instruction (namely receives the power display instruction triggered by the power display button), controls the display unit to respond to the power display instruction, and displays the position and the power of the first battery pack and the position and the power of the second battery pack in a time-sharing manner according to a preset display rule. Thus, the user can know the electric quantity of the battery pack carried by the electric tool at the beginning of use of the electric tool. If the battery pack has insufficient electric quantity, the battery pack with insufficient electric quantity can be subjected to targeted power supplement according to the information of the position indication prompt. Therefore, through the design of one display unit, the electric quantity of a single battery pack can be displayed in a time-sharing manner. The user experience can be further improved.
In one embodiment, the method for displaying the electric quantity includes: the main control unit receives the power display instruction, the main control unit sends a voltage information sampling instruction of the battery assembly electrically connected with the main control unit, a port of a voltage signal of the main control unit receives voltage information fed back by responding to the sampling instruction, the power of the battery assembly is estimated according to the fed back voltage information, the power information of the estimated battery assembly is transmitted to the display unit, one indicator lamp (such as a first indicator lamp) in the position indication module 322 is lightened, the position of the first battery assembly corresponding to the lightened indicator lamp is displayed according to a preset display rule, and the power module 321 displays the power of the first battery assembly; after a predetermined time (e.g., 1S, 2S, 3S, 4S, 5S, etc., and depending on the application, the time interval may be predetermined), another indicator light (e.g., a second indicator light) in the position indication module 322 is turned on (automatically switched to) to display the position of the second battery pack corresponding to the turned-on indicator light, and the power module 321 displays the power of the second battery pack. Thus, the user can know the electric quantity of the battery pack carried by the electric tool at the beginning of use of the electric tool. If one of the battery packs is insufficient in electric quantity, the battery packs with insufficient electric quantity can be subjected to targeted power supplement according to the information prompted by the position indication. The user experience can be further improved. When the electric tool works, the main control unit receives the electric quantity display instruction in real time and controls the display unit to display the total electric quantity after the 2 battery packs are electrically connected in real time. At this time, the indicator light in the position indication module is completely on or completely off. Specific actions are described in fig. 5 and 6, and will not be repeated here.
In one embodiment of the method for displaying the electric quantity, the main control unit receives the electric quantity display instruction, and controls the display unit to display the electric quantity of the first battery assembly, the electric quantity of the second battery assembly, and the total electric quantity after the first battery assembly and the second battery assembly are electrically connected. Specifically, the main control unit receives the power display instruction, the main control unit sends a voltage information sampling instruction of the battery assembly electrically connected to the main control unit, a port of a voltage signal of the main control unit receives voltage information fed back in response to the sampling instruction, estimates the power of the battery assembly according to the fed back voltage information, and transmits the estimated power information of the battery assembly to the display unit, one indicator lamp in the position indication module 322 is turned on (e.g., a first indicator lamp), the position of the first battery assembly corresponding to the turned-on indicator lamp is displayed according to a preset display rule, and the power module 321 displays the power of the first battery assembly; after a preset time (e.g., 1S, 2S, 3S, 4S, 5S, etc., and depending on the application, the time interval may be preset), another indicator light (e.g., a second indicator light) in the position indication module 322 is turned on (automatically switched to) to display the position of the second battery pack corresponding to the turned-on indicator light, and the power module 321 displays the power of the second battery pack; after a preset time, all the indicator lights in the position indication module are turned on (or the indicator lights are not turned on at all, depending on the application scene), and the electric quantity module 321 displays the total electric quantity after the first battery assembly and the second battery assembly are electrically connected. Of course, the display unit displays the electric quantity of a single battery pack, and the sequence of the total electric quantity after the battery packs are electrically connected can be adjusted (for example, the total electric quantity after the battery packs are electrically connected is displayed firstly, and then the electric quantity of the single battery pack is displayed in time). Thus, the user can know the electric quantity of the battery pack carried by the electric tool at the beginning of use of the electric tool. Therefore, through the design of one display unit, the electric quantity of a single battery pack and the total electric quantity after the battery packs are electrically connected can be displayed in a time-sharing manner. The user experience can be further improved.
In one embodiment of the method for displaying the electric power, the electric power display button is disposed on a surface of the body between the mounting holes or in a display unit region. It can adopt mechanical button switch, touch switch, infrared sensor, etc. The pressing of the charge amount display button by the user may be understood as one-time pressing of the button, or pressing of the button for a set time (e.g., 1S, 2S, 3S, etc.), and is not limited thereto, as long as the display corresponding to the action by pressing the charge amount display button display unit is realized. Specifically, comprise
The main control unit sends out a voltage information sampling instruction of the battery pack based on the received electric quantity display instruction (namely, the electric quantity display instruction triggered by the electric quantity display button); the main control unit receives voltage information fed back by responding to the sampling instruction based on the voltage signal port, estimates the electric quantity of the battery assembly, estimates the total electric quantity after the battery assembly is connected (electrically connected) according to a preset electric connection mode among the battery assemblies, and transmits the estimated total electric quantity (electric quantity information) after the battery assembly is connected (electrically connected) to the display unit; the display unit receives the total electric quantity transmitted by the main control unit after connection (electrical connection) and displays the total electric quantity (namely, the display unit displays the total electric quantity after connection (electrical connection) of a plurality of battery assemblies).
Or, in an embodiment, the electric quantity module displays the electric quantity of the battery assembly with low electric quantity in the first battery assembly and the second battery assembly; and the indicating lamp in the position indicating module displays the indicating lamp corresponding to the battery component according to a preset display rule. That is, the position indication module in the display unit first displays the position of the battery pack with low power in the battery packs (e.g., 2 battery packs), and the power module displays the power of the battery pack. That is, the display unit preferentially displays the power and the position of the battery pack with low power (through the comparator module of the main control unit, which is a common comparator module in the art and is not described in detail herein). Therefore, the user can know the position and the electric quantity of the current battery pack according to the position prompt, and the user experience is improved.
In the above method, the main control unit also describes that the main control unit displays an instruction based on the received electric quantity display signal.
In the above method, in the design of the display unit, the display unit includes a position indication module for displaying the position of the battery assembly, and the position indication module includes an indicator light for prompting the user of the position of the battery assembly. It can be applied as follows: the indication lamp is covered with a layer of symbols and/or letters/Chinese characters and the like with position indication, so long as a user can easily identify the position of the corresponding battery pack according to the indication lamp lighted in the position indication module when operating the electric tool.
In the above method, in the design of the display unit, the position information of the battery pack indicated by the position indication module (i.e., the position of the battery pack in the electric tool body) is set based on the predefined port (also referred to as an I/O port) of the main control unit, so that the mounting ports (mounting portions) of the electric tool body, which are electrically connected to different ports, can be distinguished when the control unit is wired, and thus the position of the battery pack can be distinguished. In one embodiment, the position indication module identifies and indicates the position of the battery pack based on the identification module, and specifically, the identification module may be an identification resistor, which is disposed at a mounting opening of the power tool body and matched to accommodate the battery pack, and the position of the battery pack can be distinguished by encoding the mounting opening. In an embodiment, the memory may further include a memory having a memory function, and the memory is disposed at the mounting opening.
The above-described embodiments represent only a few embodiments of the invention, and since there are objectively unlimited possible structures due to the limited expression of words, it will be apparent to those skilled in the art that numerous modifications and adaptations can be made without departing from the principles of the invention, and such modifications and adaptations are to be considered as within the scope of the invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (21)

1. An electric power tool, characterized by comprising:
the battery packs are arranged in the mounting openings in a matched mode and used for providing electric energy for the electric tool;
the main control unit is electrically connected to the battery assembly, the battery assembly provides driving electric energy for the main control unit, and the main control unit respectively estimates the electric quantity of the battery assembly according to the detected state information of the battery assembly and transmits the estimated information to the display unit;
the display unit is arranged on the electric tool body, is electrically connected to the main control unit, receives the estimated information transmitted by the main control unit, displays the electric quantity of each battery pack in a time-sharing manner, and displays the electric quantity of each battery pack in a single time.
2. The power tool of claim 1, wherein: further comprising the steps of (a) preparing a coating,
the electric quantity display button is configured on the body of the electric tool and is electrically connected with the main control unit; the main control unit respectively estimates the electric quantity of the battery pack and the total electric quantity after the battery packs are connected according to the detected state information of the battery pack; and the main control unit receives an electric quantity display instruction triggered by the electric quantity display button, controls the display unit to respond to the electric quantity display instruction, and displays the electric quantity of a single battery pack and the total electric quantity of the combined battery packs in a time-sharing manner according to a preset display rule.
3. The power tool of claim 1, wherein: further comprising the steps of (a) further comprising,
the electric quantity display button is configured on the body of the electric tool and is electrically connected with the main control unit; the main control unit receives an electric quantity display instruction triggered by the electric quantity display button, controls the display unit to respond to the electric quantity display instruction, controls the display unit to display the electric quantity of the first battery pack in a time-sharing mode according to a preset display rule, and displays the electric quantity of the second battery pack.
4. The power tool of claim 3, wherein: the display unit further includes: the position indicating module is electrically connected to the main control unit and comprises an indicating lamp, and a rule for lighting the position of the indicating lamp corresponding to the battery pack is preset so as to indicate the position of the battery pack; and the electric quantity module is electrically connected to the main control unit and used for receiving the information transmitted by the main control unit so as to display the electric quantity of the battery pack.
5. The power tool of claim 4, wherein:
the main control unit receives an electric quantity display instruction triggered by the electric quantity display button, controls an indicator lamp in the position indication module to be turned on, and displays the position of a first battery pack corresponding to the indicator lamp according to a preset rule for turning on the indicator lamp, and the electric quantity module displays the electric quantity of the first battery pack; and the main control unit receives the instruction of displaying the electric quantity again and controls another indicator lamp in the indicator module to display so as to display the position of a second battery pack corresponding to the indicator lamp, and the electric quantity module displays the electric quantity of the second battery pack.
6. The power tool of claim 4, wherein:
the main control unit receives an electric quantity display instruction triggered by the electric quantity display button, controls an indicator lamp in the position indication module to be turned on, displays the position of a first battery pack corresponding to the indicator lamp according to a preset rule for turning on the indicator lamp, and the electric quantity module displays the electric quantity of the first battery pack; and controlling another indicator lamp in the position indication module to automatically light up after preset time so as to display the position of a second battery pack corresponding to the indicator lamp, wherein the electric quantity module displays the electric quantity of the second battery pack.
7. The power tool of claim 4, wherein:
the main control unit receives an electric quantity display instruction triggered by the electric quantity display button, controls an indicator lamp in the position indication module to be turned on, displays the position of a first battery pack corresponding to the indicator lamp according to a preset rule for turning on the indicator lamp, and the electric quantity module displays the electric quantity of the first battery pack; after preset time, controlling another indicator light in the position indicating module to automatically light up so as to display the position of a second battery pack corresponding to the indicator light, wherein the electric quantity module displays the electric quantity of the second battery pack; and controlling the indicator lamps in the position indication module to be fully lighted or not lighted at all through preset time, and displaying the total electric quantity after the first battery pack and the second battery pack are combined by the electric quantity module.
8. The power tool of claim 5 or 6, wherein:
the position indication module displays the positions of battery assemblies with low electric quantity in the first battery assembly and the second battery assembly, and the electric quantity module displays the low electric quantity in the first battery assembly and the second battery assembly.
9. The power tool of claim 4, wherein: the electric quantity display button comprises a button, is configured on the body of the electric tool and is electrically connected with the main control unit.
10. The power tool of claim 5, wherein: the electric quantity module comprises an indicator light for displaying the electric quantity of the battery pack.
11. The power tool of claim 10, wherein:
the number of the indicator lights for displaying the electric quantity of the battery pack is 2-10.
12. The power tool of claim 10, wherein:
the indicating lamp comprises an LED indicating lamp, and when the electric quantity of the battery pack is lower than a set threshold value, the LED indicating lamp gives out an alarm prompt.
13. The power tool of claim 5, wherein:
the display unit includes: the display screen is electrically connected with the main control unit; the display screen further comprises: the position indication module is used for displaying the position of the battery pack corresponding to the position indication according to a preset display rule; and the electric quantity module is used for displaying the electric quantity of the battery pack at the position.
14. The power tool of claim 5, wherein:
the display unit is disposed on a surface of the power tool body between the mounting ports.
15. The power tool of claim 5, wherein: the display unit is disposed in a handle portion region of the power tool body.
16. A method of displaying a charge level of a battery pack of a power tool, the power tool comprising: the battery packs are matched with the mounting ports of the body of the electric tool and used for providing electric energy for the electric tool; the main control unit is electrically connected to the battery assemblies and respectively estimates the electric quantity of the battery assemblies according to the detected state information of the battery assemblies; the display unit is arranged on the electric tool body, is electrically connected to the main control unit and receives the electric quantity information transmitted by the main control unit; the method is characterized in that: the method comprises the following steps; the main control unit displays an instruction based on the received electric quantity; and controlling the display unit to respond to the instruction of electric quantity display, displaying the electric quantity of each battery assembly in a time-sharing manner, and displaying the electric quantity of each battery assembly by the display unit once.
17. The power display method of claim 16, wherein: the main control unit further comprises, after receiving the electric quantity display instruction: the main control unit sends out a voltage information sampling instruction of the battery pack; and the main control unit receives voltage information fed back by responding to the sampling instruction based on the voltage signal port, respectively estimates the electric quantity of the battery pack, and transmits the estimated information to the display unit.
18. The method for displaying electric quantity according to claim 16 or 17, wherein the display unit further comprises a position indication module and an electric quantity module, the position indication module and the electric quantity module are respectively electrically connected to the main control unit, the position indication module comprises an indicator light, and the method further comprises the steps of: the method comprises the following steps: the main control unit receives an electric quantity display instruction; controlling an indicator light in the position indicating module to display, presetting a rule for lighting the position of the indicator light corresponding to the battery pack so as to display the position of a first battery pack corresponding to the indicator light, and displaying the electric quantity of the first battery pack by the electric quantity module; and the main control unit receives the instruction of displaying the electric quantity again, controls another indicator lamp in the indicator module to display so as to display the position of the second battery pack corresponding to the indicator lamp, and the electric quantity module displays the electric quantity of the second battery pack.
19. The method for displaying electric quantity according to claim 16 or 17, wherein the display unit further comprises a position indication module and an electric quantity module, the position indication module and the electric quantity module are respectively electrically connected to the main control unit, the position indication module comprises an indicator light, and the method further comprises the steps of: the method comprises the following steps: the main control unit receives an electric quantity display instruction; controlling an indicator light in the position indicating module to display, presetting a rule for lighting the position of the indicator light corresponding to the battery pack so as to display the position of a first battery pack corresponding to the indicator light, and displaying the electric quantity of the first battery pack by the electric quantity module; and after the preset time, another indicator lamp in the indicator module displays to display the position of the second battery pack corresponding to the indicator lamp, and the electric quantity module displays the electric quantity of the second battery pack.
20. The power display method of claim 18, wherein: the position indicating module displays the position of a battery assembly with low electric quantity in the first battery assembly and the second battery assembly; the power module displays a low power level in the first battery pack and the second battery pack.
21. The power display method according to claim 16 or 17, wherein: the main control unit estimates the total electric quantity after the connection of the battery assemblies according to the detected state information of the battery assemblies; the main control unit displays an instruction based on the received electric quantity; and controlling the display unit to respond to the instruction of electric quantity display, and displaying the electric quantity of the single battery pack and the total electric quantity of the combined battery packs in a time-sharing manner according to a preset display rule.
CN201711375587.4A 2017-12-19 2017-12-19 Electric tool and electric quantity display method thereof Active CN109940561B (en)

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