Adapter, electric tool and tool system

Abstract

The invention discloses an adapter, an electric tool and a tool system, and the adapter comprises a power input end which is connected with an AC power supply; the power circuit is set to carry out energy conversion on the accessed alternating current so as to obtain electric energy capable of supplying power to the electric tool; the tool interface is configured to be capable of being connected with a power interface of the electric tool so as to output electric energy; wherein the adapter further comprises a data transmission module which is at least connected with the tool interface and can output the first communication data and / or the first internal resistance data to the tool interface, so that the electric tool identifies the adapter according to the first communication data and / or the first internal resistance data; the first communication data at least comprises adapter identification data, and the adapter identification data is set to enable the electric tool to identify the accessed equipment as an adapter in the adapter and the battery pack.

Description

Technical Field

[0001] The present application relates to the field of electric tools, and in particular to an adapter, an electric tool and a tool system. Background Art

[0002] In the related art, a DC power tool can be powered by a battery pack and can also be connected to an AC adapter to obtain power. It can also be considered that the battery pack and the AC adapter can be used as power supply devices for DC power tools. Due to the different characteristics of the battery pack and the adapter, the working performance of the tools that can be supported when the battery pack or the adapter is used to power the power tool is also different, so the power tool needs to be able to identify the type of power supply device connected. This section provides background information related to this application, which is not necessarily prior art. Summary of the invention

[0003] One object of the present application is to solve or at least alleviate part or all of the above problems. To this end, one object of the present application is to provide an adapter that can be recognized by an electric tool or an electric tool that can recognize an adapter and a battery pack.

[0004] In order to achieve the above objectives, this application adopts the following technical solutions:

[0005] An adapter, comprising: a power input terminal, configured to connect to an alternating current (AC) power source; a power circuit, configured to perform energy conversion on the connected AC power to obtain electrical energy that can power an electric tool; a tool interface, configured to be connected to the power interface of the electric tool to output electrical energy; wherein the adapter also comprises: a data transmission module, at least connected to the tool interface, capable of outputting first communication data and / or first internal resistance data to the tool interface, so that the electric tool identifies the adapter based on the first communication data and / or the first internal resistance data; the first communication data at least comprises adapter identification data, and the adapter identification data is configured for the electric tool to identify that the connected device is the adapter between the adapter and the battery pack.

[0006] In some embodiments, the data transmission module includes a first communication module; the communication protocol supported by the first communication module is at least the same as the communication protocol supported by the battery pack.

[0007] In some embodiments, the first communication module is configured to transmit the first communication data and / or the first internal resistance data by wired communication and / or wireless communication.

[0008] In some embodiments, the first communication data includes an identification frame and a communication frame; wherein the adapter identification data is set in the identification frame and / or in the communication frame.

[0009] In some embodiments, the data transmission module includes an adapter internal resistance processing module, which can at least detect and transmit the first internal resistance data.

[0010] In some embodiments, the data transmission module is configured to output the first communication data and transmit the first internal resistance data after a preset time, so that the electric tool can identify the adapter according to the first communication data and the first internal resistance data.

[0011] An electric tool comprises: a tool body; a motor, which is arranged on the tool body; a power interface, which can at least be connected to an adapter to power the motor; a control circuit, which is configured to have multiple control modes to control the operation of the motor; the control circuit at least comprises: a data acquisition module, which is at least connected to the power interface to obtain first communication data and / or first internal resistance data sent by the adapter; and a controller, which is configured to identify the adapter based on the first communication data and / or the first internal resistance data.

[0012] In some embodiments, the data acquisition module includes a second communication module configured to acquire the first communication data and / or the first internal resistance data by wired communication and / or wireless communication.

[0013] In some embodiments, the first communication data includes at least adapter identification data that can distinguish the adapter from the power tool battery pack.

[0014] In some embodiments, the first communication data includes an identification frame and a communication frame; wherein the adapter identification data is set in the identification frame and / or in the communication frame.

[0015] In some embodiments, the first communication data is acquired, and the first internal resistance data is acquired after a preset time, so as to identify the adapter according to the first communication data and the first internal resistance data.

[0016] An electric tool comprises: a tool body; a motor, which is arranged on the tool body; a power interface, which is configured to be interchangeably connected to a battery pack and an adapter; a control circuit, which is configured to have multiple control modes to control the operation of the motor; the control circuit at least comprises: a data acquisition module, which is at least connected to the power interface to obtain battery pack data transmitted by the battery pack, or to obtain adapter data transmitted by the adapter; a controller, which is configured to control the motor to operate in a first constant power mode when identifying that the power interface is connected to the battery pack based on the battery pack data; and to control the motor to operate in a second constant power mode when identifying that the power interface is connected to the adapter based on the adapter data; the output power of the first constant power mode is different from the output power of the second constant power mode.

[0017] In some embodiments, the battery pack data includes second communication data and / or second internal resistance data, and the adapter data includes first communication data and / or first internal resistance data.

[0018] In some embodiments, the controller is configured to control the output power of the motor to be less than the maximum output power allowed by the adapter when it is identified that the power interface is connected to the adapter based on the first communication data and / or the first internal resistance data.

[0019] In some embodiments, the controller is configured to, when identifying that the power interface is connected to the adapter based on the first communication data and / or the first internal resistance data, control the bus current of the control circuit to be less than or equal to a first current value; when identifying that the power interface is connected to the battery pack based on the second communication data and / or the second internal resistance data, control the bus current of the control circuit to be less than or equal to a second current value; wherein, the first current value is not equal to the second current value.

[0020] In some embodiments, the controller is configured to control the starting parameters of the motor when it is identified that the power interface is connected to the adapter according to the first communication data and / or the first internal resistance data.

[0021] In some embodiments, the power tool also includes a power display device, which is configured to display the power information of the power source connected to the power tool; the controller is configured to control the power display device to display a preset power status when it is identified that the power interface is connected to the adapter based on the first communication data and / or the first internal resistance data.

[0022] A tool system comprises: an electric tool; and an adapter or a battery pack; the adapter comprises at least a tool interface, configured to be connected to the power interface of the electric tool to output electric energy; and a data transmission module, at least connected to the tool interface, capable of outputting adapter data to the tool interface; the battery pack comprises at least a battery interface, configured to be connected to the power interface of the electric tool to output electric energy; and a battery management module, at least connected to the battery interface, capable of outputting battery pack data to the tool interface; the electric tool comprises at least a tool body; a motor, disposed on the tool body; a power interface, configured to be replaceably connected to the battery pack and the adapter; and a control circuit, configured to have multiple control modes to control the operation of the motor; wherein the control circuit comprises at least: a data acquisition module, at least connected to the power interface to obtain battery pack data transmitted by the battery pack, or to obtain adapter data transmitted by the adapter; a controller, configured to identify the battery pack or the adapter based on the battery pack data or the adapter data.

[0023] The benefit of the present application is that the power tool can identify the battery pack and the adapter based on the communication data and / or the internal resistance data, and then adaptively adjust the working mode of the power tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a structural diagram of an electric tool system in an embodiment of the present application;

[0025] Figure 2 is a structural diagram of an electric tool system in an embodiment of the present application;

[0026] Figure 3 is a schematic diagram of the circuit structure of an electric tool in an embodiment of the present application;

[0027] Figure 4 is a schematic diagram of the circuit structure of an adapter in an embodiment of the present application;

[0028] Figure 5 It is a frame diagram of communication data in an embodiment of the present application. DETAILED DESCRIPTION

[0029] Before any embodiments of the application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the above drawings.

[0030] In this application, the terms "comprises", "includes", "has" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device that includes the element.

[0031] In this application, the term "and / or" is a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects before and after are in an "and / or" relationship.

[0032] In the present application, the terms "connect", "combine", "couple", and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, direct connection refers to two parts or components being connected together without the need for an intermediate piece, and indirect connection refers to two parts or components being connected to at least one intermediate piece respectively, and the two parts or components being connected via the intermediate piece. In addition, "connect" and "couple" are not limited to physical or mechanical connections or couplings, and may include electrical connections or couplings.

[0033] In the present application, it will be understood by those of ordinary skill in the art that relative terms (e.g., "about," "approximately," "substantially," etc.) used in conjunction with quantities or conditions include the values ​​and have the meaning indicated by the context. For example, the relative terms include at least the degree of error associated with the measurement of a specific value, the tolerances caused by manufacturing, assembly, and use associated with a specific value, and the like. Such terms should also be considered to disclose a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. In addition, "substantially" may refer to plus or minus a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) on the basis of the indicated angle when expressing a relative angular position relationship (e.g., substantially parallel, substantially perpendicular).

[0034] In this application, it will be understood by those skilled in the art that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0035] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, the bottom can include directly below, lower left, lower right, lower front, and lower back, etc.

[0036] refer to Figure 1 The electric tool system 1000 shown may include an electric tool 100, an adapter 200 or a battery pack 300. The electric tool 100 may be connected to the battery pack 300 and powered by the battery pack 300, or may be connected to the adapter 200 and powered by the adapter 200. It is understandable that the adapter 200 may be connected to an AC mains or a solar panel at one end and connected to the electric tool 100 at the other end, and may at least perform AC-DC conversion on the electric energy and then power the electric tool 100. In this embodiment, the interface type of the end of the adapter 200 connected to the electric tool 100 may be at least partially consistent with the interface type of the battery pack 300 connected to the electric tool 100. Figure 1 In the embodiment, the power supply device connected to the power tool 100 can be an adapter 200 or a battery pack 300. The battery pack 300 can be connected to the power tool 100 through the battery pack interface 301, and the adapter 200 can be connected to the power tool 100 through the tool interface 23.

[0037] In one embodiment, Figure 2 The adapter 200 shown can be connected to the battery pack 300a at one end and the power tool 100 at the other end, and can perform DC-DC conversion on the electric energy and output the electric energy that can power the power tool 100. Alternatively, in an optional embodiment, the adapter 200 can also be connected to the battery pack 300a at one end and to an AC power tool at the other end, and can perform DC-AC conversion on the electric energy and output the electric energy that can power the AC power tool.

[0038] In this embodiment, the power tool 100 may be a handheld power tool, such as a drill, a pruning machine, a sander, etc. Alternatively, the power tool 200 may also be a bench tool, such as a table saw, a miter saw, etc. Alternatively, the power tool 100 may also be a hand-pushed power tool, such as a hand-pushed lawn mower, a hand-pushed snow blower, etc. Alternatively, the power tool 100 may also be a riding power tool, such as a riding lawn mower, a riding vehicle, an all-terrain vehicle, etc. Alternatively, the power tool 100 may also be a robot tool, such as a lawn mowing robot, a snow sweeping robot, etc. In some embodiments, the power tool 100 may be an electric drill, an electric light, an electric car, etc. In some embodiments, the power tool 100 may also be a garden tool, such as a pruning machine, a hair dryer, a lawn mower, a chain saw, etc. Alternatively, the power tool 100 may also be a decoration tool, such as a screwdriver, a nail gun, a circular saw, a sander, etc. In some embodiments, the power tool 100 may also be a vegetation care tool, such as a lawn mower, a lawn mower, a pruning machine, a chain saw, etc. Alternatively, the power tool 100 may also be a cleaning tool, such as a hair dryer, a snow sweeper, a cleaning machine, etc. Alternatively, the power tool 100 may also be a drilling tool, such as a drill, a screwdriver, a wrench, an electric hammer, etc. Alternatively, the power tool 100 may also be a sawing tool, such as a reciprocating saw, a jig saw, a circular saw, etc. Alternatively, the power tool 100 may also be a bench tool, such as a bench saw, a miter saw, a metal cutter, a bakelite milling machine, etc. Alternatively, the power tool 100 may also be a grinding tool, such as an angle grinder, a sanding machine, etc. Alternatively, the power tool 100 may also be other tools, such as a lamp, a fan, etc.

[0039] This application is Figure 1 and Figure 3 The table saw 100 shown is used as an example for description. The table saw 100 includes at least a tool body 101, a motor 102 disposed in the tool body 101, a power interface 103, and a control circuit 104 disposed in the tool body 101. In this embodiment, the motor 102 can be a brushed motor or a brushless motor. The power interface 103 can be replaceably connected to the adapter 200 and the battery pack 300. The power interface 103 can be a USB type interface, such as a USB-A type interface or a USB-C type interface, or it can be an interface with a metal connecting plate, such as a positive connecting plate, a negative connecting plate, and a communication connecting plate. The present application does not limit the type of the power interface 103.

[0040] In this embodiment, since the working characteristics or characteristic parameters of the adapter 200 and the battery pack 300 are different, when the two respectively power the power tool 100, the working mode or working characteristics of the power tool 100 may be different. For example, when the power tool 100 is powered by the adapter 200 and the battery pack 300, the working current when the motor 102 is started may be different, or the starting method is different, or the braking method of the motor 102 is different. For example, when the power tool 100 is powered by the battery pack 300, when the motor 102 is braked, there may be a reverse charging current in the control circuit 104 to reversely charge the battery pack 300; while when the power tool 100 is powered by the adapter 200, there cannot be a reverse charging current in the control circuit 104 when the motor 102 is braked. Therefore, when the power tool 100 is powered by the battery pack 300, the controller 12 can control the motor 102 to brake by energy recovery, and when the power tool 100 is powered by the adapter 200, the controller 12 can control the motor 102 to brake by short circuit or inertia.

[0041] like Figure 3 As shown, the control circuit 104 may at least include a data acquisition module 11, a controller 12 and a drive circuit 13. The data acquisition module 11 can be connected to the power interface 103 to acquire data from the power interface 103, and the controller 12 is connected to the data acquisition module 11, and can identify whether the power device connected to the power tool 100 is an adapter 200 or a battery pack 300 according to the acquired data, so as to control the motor 102 to work in different working modes according to the different power devices connected to the power tool 100. The different control strategies adopted by the controller 12 according to the different power devices connected to the power tool 100 are described in detail in the following embodiments. The drive circuit 13 is electrically connected to the stator winding of the motor 102, and is used to transfer the current from the power device (battery pack 300 or adapter 200) to the stator winding to drive the motor 102 to rotate. In one embodiment, the drive circuit 13 includes a plurality of switch elements Q1, Q2, Q3, Q4, Q5, and Q6. The gate terminal of each switch element is electrically connected to the controller 12, and is used to receive a control signal from the controller 12, and the control signal may be a PWM signal. The drain or source of each switching element is connected to the stator winding of the motor 102. The switching elements Q1-Q6 receive control signals from the controller 12 to change their respective conduction states, thereby changing the current loaded by the power supply device on the stator winding of the motor 102. In one embodiment, the drive circuit 13 can be a three-phase bridge driver circuit including six controllable semiconductor power devices (such as FET, BJT, IGBT, etc.). It can be understood that the above-mentioned switching elements can also be any other type of solid-state switches, such as insulated gate bipolar transistors (IGBTs), bipolar junction transistors (BJTs), etc.

[0042] To drive Figure 3 The motor 102 shown rotates, and the drive circuit 13 has multiple drive states. In different drive states, the speed or direction of the motor 102 can be different. This application does not elaborate on the process of the controller 12 controlling the drive circuit 13 to change different drive states so that the motor 102 obtains different speeds or directions.

[0043] like Figure 1 and Figure 4 As shown, the adapter 200 at least includes a power input terminal 21, a power circuit 22, and a tool interface 23. The power input terminal 21 can be connected to an AC mains, or can be connected to a photovoltaic panel. The power circuit 22 can convert the connected AC power into electric energy that can power the power tool 100. The tool interface 23 can at least be connected to the power interface 103 of the power tool 100 to transmit electric energy.

[0044] In this embodiment, the adapter 200 also includes a data transmission module 24, which is at least connected to the tool interface 23, and can at least transmit the adapter data of the adapter 200, that is, the first communication data and / or the first internal resistance data to the tool interface 23, and transmit it to the power interface 103 through the tool interface 23. The data acquisition module 11 on the electric tool 100 side can obtain the adapter data transmitted by the data transmission module 24, and then the controller 12 can identify the adapter 200 according to the adapter data. In one implementation, the tool interface 23 and the power interface 103 include an electrical connection interface and a communication connection interface, which can realize electrical connection and communication connection. The data transmission module 24 can transmit communication data with the data acquisition module 11 through the communication connection channel between the tool interface 23 and the power interface 103. In one implementation, the data transmission module 24 and the data acquisition module 11 can also transmit the first communication data and / or the first internal resistance data in a wireless communication manner. For example, the data transmission module 24 can transmit the first communication data and / or the first internal resistance data to the data acquisition module 11 in a manner such as Bluetooth, wireless local area network, near field communication, cellular network, ZigBee, etc.

[0045] In this embodiment, the first communication data may at least include adapter identification data that can distinguish the adapter 200 from the battery pack 300, for example, the adapter 200 model, product parameters, etc. In this embodiment, the adapter 200 may be provided with a resistor that can identify the adapter type, and the parameter information of the resistor, i.e., the first internal resistance data, may be transmitted to the power tool 100 through the data transmission module 24. In other words, the first communication data or the first internal resistance data can uniquely identify the identity of the adapter 200.

[0046] like Figure 4As shown, the data transmission module 24 at least includes a first communication module 241, and the first communication module 241 is configured to transmit the first communication data and / or the first internal resistance data by wired communication and / or wireless communication. Among them, the wired communication method may include carrier communication or communication line communication or connection piece communication, etc. Exemplarily, the tool interface 23 includes a positive electrode interface, a negative electrode interface and a communication interface, and the communication interface can be set as a communication connection piece, which can be connected to the communication connection piece in the power interface 103 to transmit adapter data. The wireless communication method may include one or more common wireless communication technologies, such as Bluetooth, wireless local area network, near field communication, cellular network, ZigBee, etc. In this embodiment, the first communication module 241 at least supports the same communication protocol as the battery pack 300. For example, the first communication module 241 supports the Bluetooth communication protocol, and the battery pack 300 also supports the Bluetooth communication protocol.

[0047] Accordingly, reference Figure 3 The data acquisition module 11 in the electric tool 100 may also include a second communication module 111, which is at least in communication connection with the first communication module 241 and can acquire the first communication data and / or the first internal resistance data transmitted by the first communication module 241. In this embodiment, the first communication module 241 and the second communication module 111 support at least one same communication protocol.

[0048] In one embodiment, the data transmission module 24 further includes an adapter internal resistance processing module 242 , which can at least collect resistance information of the resistor that identifies the adapter type, and can also transmit the resistance information to the power tool 100 via the first communication module 241 .

[0049] like Figure 5As shown, the first communication data may include an identification frame and a communication frame, wherein the transmission frequency or transmission protocol of the identification frame and the communication frame may be different, so that the data acquisition module 11 on the battery pack 300 side can identify the adapter 200 according to the transmission frequency or transmission protocol of the frame. In one embodiment, the adapter identification data may be set in the identification frame or in the communication frame, or in both. That is, the data acquisition module 11 on the battery pack 300 side may also identify the adapter 200 according to the adapter identification data in the identification frame or the communication frame. In one embodiment, the transmission frequency or transmission protocol of the identification frame and the communication frame are different, and the identification frame at least carries the adapter identification data, and the communication frame may include the working parameters of the adapter 100 when it is working normally, for example, including the working voltage, current, temperature or output power of the adapter 200. That is, the power tool 100 can identify the adapter 200 through the identification frame sent by the adapter 200, and obtain the working parameters of the adapter 200 when it is working normally through the communication frame sent by the adapter 200. In one embodiment, the identification frame and / or the communication frame may be a square wave signal, or a coded signal composed of binary digits.

[0050] In this embodiment, the first communication module 241 can first send an identification frame to the data acquisition module 11 after the adapter 200 establishes a connection with the power tool 100, and then send a communication frame after a certain period of time. Thus, the power tool 100 can first identify the identity of the adapter 200 through the identification frame, and after confirming the identity of the adapter 200, continue to obtain the working parameters of the adapter 200. In an optional implementation, the communication frame sent by the first communication module 241 includes not only normal working parameters, but also adapter identification data, so that the power tool 100 confirms the identity of the adapter 200 again each time it receives the working parameters of the adapter 100. In an optional implementation, the communication frame sent by the first communication module 241 carries the adapter identification data at intervals of a certain frame length.

[0051] In one embodiment, the data transmission module 24 may first output the first communication data to the tool interface 103 or output the first communication data to the data acquisition module 11 via wireless communication, and then transmit the first internal resistance data to the tool interface 103 or output the first internal resistance data to the data acquisition module 11 via wireless communication after a preset time, so that the controller 12 on the electric tool 100 side may first identify the adapter according to the first communication data, and then identify the adapter again according to the first internal resistance data. Through two identifications and double judgments, it is ensured that the electric tool 100 can accurately identify the adapter. In one embodiment, the data transmission module 24 may also send the first internal resistance data first, and then send the first communication data after a preset time. It is understandable that the time intervals for the data transmission module 24 to send the first communication data and the first internal resistance data may be different in different types of adapters, which is not specifically limited here.

[0052] In this embodiment, the battery pack 300 also has a data transmission module (not shown) that can communicate with the data acquisition module 11 on the power tool 100 side by wire or wirelessly. The data transmission module in the battery pack 300 can have the same data transmission mode as the data transmission module 24 in the adapter 200, for example, the same wired transmission mode or wireless transmission mode. In this embodiment, the data transmission module in the battery pack 300 can transmit the battery pack data, i.e., the second communication data and / or the second internal resistance data to the power tool 100. The data acquisition module 11 on the power tool 100 side can obtain the battery pack data transmitted by the data transmission module in the battery pack 300, and then the controller 12 can identify the battery pack 300 according to the battery pack data. In this embodiment, the connection mode of the battery pack 300 to the power tool 100 can be consistent or partially consistent with the connection mode of the adapter 200 to the power tool 100, which will not be described in detail here. The second communication data and / or second internal resistance data output by the battery pack 300 may also refer to the first communication data and / or first internal resistance data output by the adapter 200. For example, the second communication data may at least include battery pack identification data that can distinguish the battery pack 300 from the adapter 200, such as the model and product parameters of the battery pack 300. Alternatively, the second communication data may include an identification frame and a communication frame, where the identification frame and the communication frame may also refer to the settings of the identification frame and the communication frame output by the adapter 200, such as the transmission frequency of the frame, the transmission protocol or the information contained in the frame data.

[0053] In this embodiment, the data acquisition module 11 in the power tool 100 can be configured to stop acquiring identification frames or stop receiving adapter data or battery pack data when no identification frames are acquired within a certain period of time. At this time, the controller 12 can consider that there is a connection failure between the adapter 200 or the battery pack 300 and the power tool 100.

[0054] In one embodiment, when the power tool 100 recognizes that the power supply device connected to the power interface 103 is the battery pack 300, the working mode of the power tool 100 can be some working modes well known to those skilled in the art, which are not listed here one by one.

[0055] In some embodiments, the battery pack connected to the power tool 100 has different models or capacities, and the corresponding SOP parameter representing the maximum allowable output power of the battery pack is also set differently. For example, the SOP values ​​of battery packs with different signals at different capacities are shown in Table 1.

[0056] Table 1

[0057]

[0058]

[0059] In some embodiments, when the power tool 100 recognizes that the connected power supply device is a battery pack 300, the controller 12 can control the bus current of the motor 102 to not exceed a second current threshold, for example, not exceed 300A.

[0060] In some embodiments, when the power tool 100 recognizes that the connected power supply device is a battery pack 300, the starting parameters of the motor 102 can be controlled according to the electrical parameters of the battery pack 300. For example, the width of the positioning pulse for starting the motor 102 can be controlled according to the real-time voltage or internal resistance of the battery pack 300. Exemplarily, before the motor starts, different pulse widths are set according to the voltage and / or internal resistance information of the battery pack 300 to ensure that the pulse current is not too large or too small, and the motor can be accurately positioned. When the voltage of the battery pack 300 is small, the pulse width is increased; when the voltage of the battery pack 300 is large, the pulse width is reduced; when the internal resistance of the battery pack 300 is small, the pulse width is reduced; when the internal resistance of the battery pack 300 is large, the pulse width is increased. In this embodiment, the positioning pulse can be understood as the rotor position of the next commutation when the motor is not started by using the inductance method to ensure that the motor can start normally.

[0061] In this embodiment, when the power tool 100 recognizes that the connected power supply device is a battery pack 300, the motor 102 can be controlled to operate in a first constant power mode. When the connected power supply device is recognized as an adapter 200, the motor 102 can be controlled to operate in a second constant power mode. The output power of the first constant power mode is different from the output power of the second constant power mode. In other words, when the power tool 100 is connected to the battery pack 300 or the adapter 200, although both can operate at constant power, the output power is different. In one embodiment, the output power of the motor in the first constant power mode and the second constant power mode is the same.

[0062] In one embodiment, when the power tool 100 identifies that the connected power supply device is a battery pack 300, the motor 102 can be controlled to operate in a first constant current mode, and when the connected power supply device is identified as an adapter 200, the motor 102 can be controlled to operate in a second constant current mode. The output current of the first constant current mode is different from the output current of the second constant current mode.

[0063] In one embodiment, when the power tool 100 recognizes that the power device connected to the power interface 103 is the adapter 200, the controller 12 is configured to at least respond to a brake signal and control the motor 102 to not generate a reverse charging current during braking.

[0064] In one embodiment, when the power tool 100 recognizes that the power supply device connected to the power interface 103 is the adapter 200, the controller 12 is configured to control the bus current of the motor 102 to not exceed a first current threshold, for example, not exceeding 200 A. In this embodiment, the first current threshold is less than the second current threshold. In one embodiment, the first current threshold is the same as the second current threshold.

[0065] In one embodiment, when the power tool 100 recognizes that the power device connected to the power interface 103 is the adapter 200 , the controller 12 is configured to control the positioning pulse width of the motor 102 to be 120 us.

[0066] In one embodiment, the power tool 100 may further include a power display device 105, which can display the power information of the power supply device connected to the power tool 100, for example, it can display the remaining power of the power supply device or can change the display state to issue an alarm when the voltage or power of the power supply device is too low. In this embodiment, when the power tool 100 recognizes that the power supply device connected to the power interface 103 is an adapter 200, the controller 12 is configured to control the power display device 105 to display a preset power state. Among them, the preset power state can at least continuously display a full power state, or continuously display a state of a constant power value.

[0067] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the above embodiments do not limit the present application in any form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the present application.

Claims

1. An adapter, comprising: A power input terminal, configured to connect to an AC power source; A power circuit is configured to convert the input alternating current to obtain electrical energy capable of powering the electric tool; A tool interface, configured to be connectable to a power interface of the electric tool to output electric energy; Characterized in that the adapter also includes: a data transmission module, connected at least to the tool interface, capable of outputting first communication data and / or first internal resistance data to the tool interface, so that the electric tool can identify the adapter according to the first communication data and / or the first internal resistance data; The first communication data at least includes adapter identification data, and the adapter identification data is configured for the electric tool to identify that the connected device is the adapter between the adapter and the battery pack.

2. The adapter according to claim 1, characterized in that: The data transmission module includes a first communication module; the communication protocol supported by the first communication module is at least the same as the communication protocol supported by the battery pack.

3. The adapter according to claim 1, characterized in that: The first communication module is configured to transmit the first communication data and / or the first internal resistance data by wired communication and / or wireless communication.

4. The adapter according to claim 1, characterized in that: The first communication data includes an identification frame and a communication frame; wherein the adapter identification data is set in the identification frame and / or the communication frame.

5. The adapter according to claim 1, characterized in that: The data transmission module includes an adapter internal resistance processing module, which can at least detect and transmit the first internal resistance data.

6. The adapter according to claim 1, characterized in that: The data transmission module is configured to output the first communication data and transmit the first internal resistance data after a preset time, so that the electric tool can identify the adapter according to the first communication data and the first internal resistance data.

7. An electric tool comprising: Tool body; A motor, disposed on the tool body; A power interface, capable of at least connecting an adapter to supply power to the motor; A control circuit configured to have multiple control modes to control the operation of the motor; The control circuit at least comprises: A data acquisition module, connected to at least the power interface to acquire first communication data and / or first internal resistance data sent by the adapter; The controller is configured to identify the adapter according to the first communication data and / or the first internal resistance data.

8. The electric tool according to claim 7, characterized in that: The data acquisition module includes a second communication module configured to acquire the first communication data and / or the first internal resistance data by wired communication and / or wireless communication.

9. The electric tool according to claim 7, characterized in that: The first communication data at least includes adapter identification data that can distinguish the adapter from the power tool battery pack.

10. The electric tool according to claim 9, characterized in that: The first communication data includes an identification frame and a communication frame; wherein the adapter identification data is set in the identification frame and / or the communication frame.

11. The electric tool according to claim 7, characterized in that: The controller is configured to acquire the first communication data and acquire the first internal resistance data after a preset time, so as to identify the adapter according to the first communication data and the first internal resistance data.

12. An electric tool comprising: Tool body; A motor, disposed on the tool body; A power interface configured to be replaceably connected to a battery pack and an adapter; A control circuit configured to have multiple control modes to control the operation of the motor; The control circuit at least comprises: A data acquisition module, connected to at least the power interface to acquire battery pack data transmitted by the battery pack, or to acquire adapter data transmitted by the adapter; a controller configured to control the motor to operate in a first constant power mode when the power interface is connected to the battery pack according to the battery pack data; When it is identified according to the adapter data that the power interface is connected to the adapter, the motor can be controlled to operate in a second constant power mode; The output power of the first constant power mode is different from the output power of the second constant power mode.

13. The electric tool according to claim 12, characterized in that: The battery pack data includes second communication data and / or second internal resistance data, and the adapter data includes first communication data and / or first internal resistance data.

14. The electric tool according to claim 13, characterized in that: The controller is configured to control the output power of the motor to be less than the maximum output power allowed by the adapter when it is identified that the power interface is connected to the adapter according to the first communication data and / or the first internal resistance data.

15. The electric tool according to claim 13, characterized in that: The controller is configured to, when identifying that the power interface is connected to the adapter based on the first communication data and / or the first internal resistance data, control the bus current of the control circuit to be less than or equal to a first current value; when identifying that the power interface is connected to the battery pack based on the second communication data and / or the second internal resistance data, control the bus current of the control circuit to be less than or equal to a second current value; wherein the first current value is not equal to the second current value.

16. The electric tool according to claim 13, characterized in that: The controller is configured to control the starting parameters of the motor when it is identified that the power interface is connected to the adapter according to the first communication data and / or the first internal resistance data.

17. The electric tool according to claim 13, characterized in that: The electric tool also includes a power display device, which is configured to display the power information of the power source connected to the electric tool; the controller is configured to control the power display device to display a preset power status when it is identified that the power interface is connected to the adapter based on the first communication data and / or the first internal resistance data.

18. A tool system comprising: Power tools; as well as Adapter or battery pack; The adapter at least comprises: a tool interface configured to be connectable to a power interface of the electric tool to output electric energy; and A data transmission module, connected to at least the tool interface, capable of outputting adapter data to the tool interface; The battery pack at least includes a battery interface configured to be connected to a power interface of the electric tool to output electric energy; and A battery management module, connected at least to the battery interface, capable of outputting battery pack data to the tool interface; The electric tool at least comprises: Tool body; A motor, disposed on the tool body; A power interface configured to be replaceably connected to the battery pack and the adapter; and A control circuit configured to have multiple control modes to control the operation of the motor; Wherein, the control circuit at least includes: A data acquisition module, connected to at least the power interface to acquire battery pack data transmitted by the battery pack, or to acquire adapter data transmitted by the adapter; The controller is configured to identify the battery pack or the adapter according to the battery pack data or the adapter data.

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