CN215580438U

CN215580438U - Electric tool system

Info

Publication number: CN215580438U
Application number: CN202121336172.8U
Authority: CN
Inventors: 沈峰; 吕少锋; 陈明明
Original assignee: Positec Power Tools Suzhou Co Ltd
Current assignee: Positec Power Tools Suzhou Co Ltd
Priority date: 2021-06-16
Filing date: 2021-06-16
Publication date: 2022-01-18
Anticipated expiration: 2031-06-16

Abstract

The application relates to the technical field of electric tools, and particularly discloses an electric tool system. The power tool system comprises a battery pack, an adapter and a power tool, wherein the battery pack is connected with the power tool through the adapter; the adapter is used for receiving first type information sent by the battery pack and converting the first type information into second type information suitable for the electric tool to recognize; and sending the second type information to the electric tool, and controlling the electric tool to work on the basis of the second type information. The electric tool can realize information interaction with the same battery pack, and adjust the working state of the electric tool according to the information of the battery pack, so that the utilization rate of the battery pack is effectively improved, the working state of the electric tool can be adjusted in time, and the service life of the battery pack is guaranteed.

Description

Electric tool system

Technical Field

The present application relates to the field of power tool technology, and more particularly, to a power tool system.

Background

With the increasing market demand of electric tools, electric tools of various brands are continuously available, and generally, each kind of electric tool has a special battery pack matched with the electric tool. However, since one type of battery pack can only match one type of electric tool, even one type of electric tool under one type of brand, the compatibility of the battery pack is poor, the utilization rate is low, and a special battery pack for each type of electric tool needs to be produced, which causes great waste of resources.

In view of the above problems, currently, an adapter is provided between a battery pack and an electric tool to match a battery pack of one type with a plurality of types of electric tools, so that the utilization rate of the battery pack is improved. However, the prior art adapter includes a battery end for connection to a battery pack and a tool end for connection to a tool. The Battery end receives the energy of the Battery pack and transmits the energy of the Battery pack to the tool through the tool end. The tool is activated by receiving power from the battery pack. However, the battery end of the adapter does not receive the status information transmitted by the battery pack, and the tool end therefore does not transmit the status information of the battery pack to the tool. The tool cannot acquire real-time state information of the battery pack, so that the tool can only perform extensive over-discharge protection on the battery pack according to the voltage state of the whole battery pack, and cannot perform refined over-discharge protection on the battery pack based on the real-time state of the battery core in the battery pack. Long-term use can result in a significant reduction in the life of the battery pack.

SUMMERY OF THE UTILITY MODEL

In view of the above, there is a need to provide an adapter and a power tool system that address the above-mentioned problems.

A power tool system comprising a battery pack, an adapter, and a power tool, the battery pack including a positive terminal, a negative terminal, and a first signal terminal, the power tool including a positive terminal, a negative terminal, and a second signal terminal, the adapter including a first end connected with the battery pack and a second end connected with the power tool;

the battery pack monitors the state of a single-section battery cell and/or the state of the whole battery pack to obtain first type information, and the first type information is sent to the adapter through the first signal terminal;

the adapter converts the first type information into second type information suitable for the electric tool to recognize, and transmits the second type information to the second signal terminal;

the electric tool controls its own operation based on the second type information input from the second signal terminal.

In one embodiment, the first signal terminal comprises a communication signal terminal, and the first type of information comprises a first digital signal.

In one embodiment, the first signal terminal further comprises an analog signal terminal, and the first type information comprises a second analog signal.

In one embodiment, the first signal terminal includes a communication signal terminal and an analog signal terminal, and the first type information includes a first digital signal and a second analog signal.

In one embodiment, the adapter includes a second controller for analyzing the second type of information and converting the first type of information into a third analog signal for characterizing whether or not to allow the discharge to continue, the second signal terminal includes an analog signal terminal, and the second type of information includes the third analog signal.

In one embodiment, when the second controller determines that at least one of the first digital signal and the second analog signal is not suitable for continuing the discharge, a third analog signal for indicating that the discharge is not allowed to continue is generated, otherwise, the third analog signal for indicating that the discharge is allowed to continue is generated.

In one embodiment, the third analog signal for indicating that the discharge is not allowed to continue includes a high temperature analog signal or a low temperature analog signal suitable for identification by the power tool, and the third analog signal for indicating that the discharge is allowed to continue includes a normal temperature analog signal suitable for identification by the power tool.

In one embodiment, the adapter includes a second controller for converting the first digital signal into a fourth analog signal suitable for recognition by the power tool and transmitting the fourth analog signal to the second signal terminal, the second signal terminal includes an analog signal terminal, and the second type of information includes the fourth analog signal.

In one embodiment, the adapter includes a second controller for converting the first type of information into a second digital signal and transmitting the second digital signal to the second signal terminal, the second signal terminal including a communication signal terminal, the second type of information including the second digital signal.

In one embodiment, the adapter includes a second controller for converting the first type information into a third analog signal and a second digital signal, and transmitting the third analog signal and the second digital signal to the second signal terminal, the second signal terminal includes an analog signal terminal and a communication signal terminal, and the second type information includes the third analog signal and the second digital signal.

In one embodiment, when the power tool is connected to the battery pack through the adapter, the power tool sends an activation signal to the battery pack through the second signal terminal, the adapter and the first signal terminal.

In one embodiment, the power tool comprises a third controller and a first current sampling unit, the first current sampling unit is used for collecting current information on a working loop formed by the battery pack, the adapter and the power tool, and the third controller is used for controlling the power tool to work based on the current information and the second type information.

A power tool system comprises a single battery pack, a plurality of adapters and a plurality of power tools, wherein the single battery pack can be matched and connected with different power tools through different adapters at different times, and each adapter corresponds to each power tool one by one;

the battery pack comprises a positive terminal, a negative terminal and a first signal terminal, each electric tool comprises a positive terminal, a negative terminal and a second signal terminal, and each adapter comprises a first end connected with the battery pack and a second end connected with the corresponding electric tool;

the adapter converts the first type information into second type information suitable for the electric tool to recognize, and sends the second type information to the second signal terminal, and the electric tool controls the electric tool to work based on the second type information input by the second signal terminal.

In one embodiment, the first signal terminal further comprises an analog signal terminal, and the first type information further comprises a second analog signal.

In one embodiment, the adapter includes a second controller for analyzing the first type information and converting the first type information into a third analog signal for characterizing whether or not to allow the discharge to continue, the second signal terminal includes an analog signal terminal, and the second type information includes the third analog signal.

A power tool system comprising a battery pack, an adapter, and a power tool, the battery pack including a positive terminal, a negative terminal, and a first signal terminal, the power tool including a positive terminal and a negative terminal, the adapter including a first end connected to the battery pack and a second end connected to the power tool;

the adapter judges whether the battery pack is allowed to continue discharging according to the first type information; and controlling the on-off of a working loop formed by the battery pack, the adapter and the electric tool according to the judgment result.

In one embodiment, the first signal terminal comprises a communication signal terminal, and the first type of information comprises a first digital signal;

the adapter comprises a second controller, the second controller analyzes the first digital signal, generates a first judgment result used for representing whether the continuous discharging is suitable or not, and controls the on-off of a working circuit formed by the battery pack, the adapter and the electric tool based on the first judgment result.

In one embodiment, the first signal terminal comprises an analog signal terminal, the first type information further comprises a second analog signal;

the adapter comprises a second controller, the second controller analyzes the second analog signal and generates a second judgment result used for representing whether the battery pack is suitable for continuous discharging, and the second controller controls the on-off of a working loop formed by the battery pack, the adapter and the electric tool based on the second judgment result.

In one embodiment, the adapter includes a switch circuit, the switch circuit is disposed on the working circuit, and the second controller controls on/off of the switch circuit according to the determination result.

In one embodiment, the adapter includes a second current sampling unit, the second current sampling unit is configured to collect current information of the working circuit, and the second controller controls on/off of the working circuit based on the current information and the determination result.

An adapter comprising a first end to which a battery pack is connected and a second end to which a power tool is connected;

the battery pack monitors the state of a single-section battery cell and/or the state of the whole battery pack to obtain first type information, and the first type information is sent to the adapter through a first signal terminal;

the adapter converts the first type information into second type information suitable for the electric tool to recognize, and sends the second type information to a second signal terminal of the electric tool;

In one embodiment, the first signal terminal comprises an analog signal terminal and the first type of information comprises a second analog signal.

In one embodiment, the adapter includes a second controller for analyzing the first type of information, converting the first type of information into a third analog signal indicative of whether or not to allow the discharge to continue, and sending the third analog signal to the second signal terminal, the third analog signal being suitable for recognition by the power tool, the second signal terminal including an analog signal terminal, and the second type of information including the third analog signal.

In one embodiment, when the power tool is connected to the battery pack through the adapter, the adapter transmits an activation signal transmitted by the second signal terminal of the power tool to the battery pack through the first signal terminal of the battery pack so as to activate the battery pack.

In one embodiment, the first signal terminal comprises an analog signal terminal, the first type of information comprises a second analog signal;

In one embodiment, the adapter further includes a second current sampling unit, the second current sampling unit is configured to collect current information of the working circuit, and the second controller controls on/off of the working circuit based on the current information and the determination result.

According to the electric tool system, the single battery pack can be connected with different electric tools in a matched mode through different adapters at different moments, each adapter can convert first type information, which is sent by the battery pack and is related to the state of the battery pack (including the state of a single battery cell and/or the state of the whole battery pack), of the battery pack into second type information which is suitable for being recognized by each electric tool, and the second type information is sent to the electric tool, so that the electric tool can know the real-time state information of the battery pack, and further the working states of the electric tool and the battery pack can be controlled according to the second type information, therefore, refined over-discharge protection can be carried out on the battery pack based on the real-time state information of the battery pack, and the service life of the battery pack is effectively prolonged.

According to the electric tool system, a single battery pack can be connected with multiple electric tools in a matched mode through multiple adapters, the utilization rate of the battery pack is improved, meanwhile, the adapter can judge whether the battery pack is allowed to continue discharging or not based on first type information about the state (including the state of a single cell and/or the state of the whole battery pack) of the battery pack, which is sent by the battery pack, and controls the on-off of a working circuit formed by the battery pack, the adapter and the electric tools according to a judgment result, namely, the adapter can control the discharging process of the battery pack to the outside in time according to the real-time state of the battery pack, the battery pack is subjected to refined over-discharge protection based on the real-time state information of the battery pack, and the service life of the battery pack is effectively prolonged.

Drawings

Fig. 1 is a schematic structural diagram of a power tool system according to an embodiment of the present application;

fig. 2-4 are schematic structural views of a power tool system according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of an electric tool system according to a second embodiment of the present application;

fig. 6 is a schematic structural diagram of an electric tool system according to a third embodiment of the present application;

FIG. 7 is a schematic flow chart illustrating operation of the power tool system of FIG. 2;

FIG. 8 is a schematic flow chart illustrating operation of the power tool system of FIG. 3;

FIG. 9 is a schematic flow chart illustrating operation of the power tool system of FIG. 4;

fig. 10 is a schematic flow chart illustrating operation of the power tool system of fig. 6.

Description of reference numerals:

100. a battery pack; 110. a battery pack; 120. a battery monitoring system; 130. a first controller; 140. a first digital communication circuit; 150. a first analog circuit;

200. an adapter; 210. a second digital communication circuit; 220. a second controller; 230. a second analog circuit; 240. a third analog circuit; 250. a third digital communication circuit; 260. a switching circuit; 270. a load activation circuit; 201. a first adapter; 202. a second adapter; 203. a third adapter;

300. an electric tool; 310. a fourth analog circuit; 320. a third controller; 330. a fourth digital communication circuit; 340. a power supply circuit; 350. a motor control unit; 301. a first tool; 302. a second tool; 303. a third tool.

Detailed Description

To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are given in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

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 application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In view of the above problems, it has appeared at present that matching between a battery pack and a plurality of types of electric tools is realized by providing an adapter between the battery pack and the electric tools, so as to improve the utilization rate of the battery pack. The Battery end receives the energy of the Battery pack and transmits the energy of the Battery pack to the tool through the tool end. The tool is activated by receiving power from the battery pack. However, the battery end of the adapter does not receive the status information transmitted by the battery pack, and the tool end therefore does not transmit the status information of the battery pack to the tool. The tool cannot acquire real-time state information of the battery pack, so that the tool can only perform extensive over-discharge protection on the battery pack according to the voltage state of the whole battery pack, and cannot perform refined over-discharge protection on the battery pack based on the real-time state of the battery core in the battery pack. Long-term use can result in a significant reduction in the life of the battery pack.

To address this issue, the present application provides an adapter and a power tool system.

Example one

The present embodiment provides an electric tool system, and referring to fig. 1, the electric tool system includes a battery pack 100, an adapter 200, and an electric tool 300, and the battery pack 100 is connected to the electric tool 300 through the adapter 200. The adapter 200 is used for receiving first type information sent by the battery pack 100, wherein the first type information comprises real-time state information of the battery pack 100; converting the first type of information into a second type of information suitable for recognition by the power tool 300; and sending the second type information to the electric tool 300, and controlling the electric tool 300 to work based on the second type information.

The adapter comprises a first end connected with the battery pack and a second end connected with the electric tool;

the battery pack monitors the state of a single battery cell and/or the state of the whole battery pack to obtain first type information, and the first type information is sent to the adapter through the first signal terminal. The state of the single battery cell and/or the state of the whole battery pack include, but are not limited to, at least one of the following information, real-time temperature of the battery pack, real-time voltage of the whole battery pack, real-time temperature of the battery cell, real-time voltage of the single battery cell, and the like. The battery pack can obtain the first type information based on the state of the single battery cell and/or the state of the whole battery pack, and also can obtain the first type information based on the state of the single battery cell and/or the state of the whole battery pack and other information which is stored in the battery pack in advance and reflects the inherent property of the battery pack. The information reflecting the inherent property of the battery pack, which is stored in the battery pack in advance, includes, but is not limited to, at least one of the following information, the rated capacity of the battery pack, the rated voltage of the entire pack of the battery pack, the cell type of the battery pack, the number of cells connected in parallel within the battery pack, the maximum allowable discharge current of the battery pack, and the like.

The adapter converts the first type information into second type information suitable for the electric tool to recognize, and sends the second type information to the second signal terminal;

the power tool controls its own operation based on the second type of information input from the second signal terminal.

In the electric tool system, the battery pack 100 can be connected with the electric tools 300 of the same type in a matching manner through the adapter 200, and the adapter 200 can convert the first type of information about the battery pack state (including the single cell state and/or the whole pack state) sent by the battery pack 100 into the second type of information suitable for the identification of the electric tools 300 and send the second type of information to the electric tools 300, so that the electric tools 300 can know the real-time state information of the battery pack, and further can control the working states of the battery pack and the electric tools according to the second type of information, thereby realizing fine overdischarge protection of the battery pack based on the real-time state information of the battery pack and effectively prolonging the service life of the battery pack.

The electric tool 300 may include a mower, a snow sweeper, a dust collector, and the like, and may further include an electric hammer, an electric drill, and the like. The same adapter 200 can be matched with the same type of electric tool 300, and the same battery pack 100 can be connected with the same type of electric tool 300 through the same adapter 200 and can supply power to the electric tool 300. For example, the same battery pack 100 can be connected with a mower of a certain brand through the same adapter 200 in a matching manner, and the matching connection of the same battery pack 100 with mowers of different brands can be realized by designing different adapters 200, so that a user can use the battery pack 100 and different adapters 200 in a matching manner with mowers of different brands only by purchasing one battery pack 100, thereby improving the compatibility between the battery pack 100 and the electric tool 300 and improving the utilization rate of the battery pack 100.

In this embodiment, after the battery pack 100, the adapter 200 and the electric tool 300 are connected, the battery pack 100 sends first type information to the adapter 200, where the first type information is information suitable for the battery pack 100 to identify and process, and may include real-time status information of the battery pack, discharge capability, information suitable for continuing discharge, and the like. The real-time state information at least comprises at least one of the real-time temperature of the battery pack, the real-time voltage of a single battery cell, the real-time voltage of the whole battery pack and the like. The discharge capacity at least comprises at least one of rated capacity of the battery pack, rated voltage of the whole battery pack, cell type of the battery pack, number of cells connected in parallel in the battery pack, maximum allowable discharge current of the battery pack and the like. Since the electric tool 300 cannot directly recognize the first type information of the battery pack 100, the first type information is converted into the second type information suitable for the electric tool 300 through the adapter 200, and the converted second type information is transmitted to the electric tool 300, so that the electric tool 300 can recognize the information transmitted by the battery pack 100 and adjust its own operating state accordingly.

In one embodiment, the first signal terminal includes a communication signal terminal, the first type information includes a first digital signal, and the first digital signal may include real-time status information of the battery pack and a digital signal corresponding to a discharge capability. The real-time status information of the battery pack 100 includes the temperature of the battery pack 100, the voltage and total voltage of each battery, and the discharging capability of the battery pack may include the battery type, capacity and voltage.

Specifically, referring to fig. 2, the battery pack 100 may include a battery pack 110, a battery monitoring system 120, a first controller 130, and a first digital communication circuit 140, wherein the battery monitoring system 120 is connected to the battery pack 110 and the first controller 130, respectively, the first controller 130 is further connected to the first digital communication circuit 140, and the first digital communication circuit 140 is externally connected to the adapter 200 through a first signal terminal BD. The battery monitoring system 120 is configured to monitor at least one of temperature of the battery pack 110, voltage of each battery in the battery pack 110, and total voltage, and send the monitored information to the first controller 130, where the first controller 130 preprocesses the monitored information and sends the preprocessed information to the first digital communication circuit 140, and the preprocessed information is sent to the adapter 200 through the first digital communication circuit 140 and the first signal terminal BD. That is, it is the digital signal that the battery pack 100 transmits to the adapter 200.

The adapter 200 may include a second controller 220, the second controller 220 being configured to analyze and signal convert the first digital signal.

Specifically, referring to fig. 2, the adapter 200 may further include a second digital communication circuit 210 therein, and the second controller 220 is connected to the second digital communication circuit 210. The second digital communication circuit 210 and the first digital communication circuit 140 in the battery pack 100 communicate with each other based on a first digital communication protocol, that is, the adapter 200 receives a first digital signal sent by the battery pack 100 through the second digital communication circuit 210 and sends the first digital signal to the second controller 220, and the second controller 220 analyzes the first digital signal and determines whether the battery pack 100 is still suitable for continuous discharging.

In this embodiment, both the first controller 130 and the second controller 220 may adopt an MCU (micro controller Unit). In addition, the battery pack 100 and the adapter 200 are respectively provided with a power circuit 340 therein, and the power circuit 340 is used for supplying power to the first controller 130, the second controller 220 and other devices to be powered.

In one embodiment, the first signal terminal comprises an analog signal terminal and the first type of information comprises a second analog signal. And the second analog signal is used for representing whether the battery pack is suitable for continuously discharging.

Specifically, referring to fig. 2, in this embodiment, the battery pack 100 further includes a first analog circuit 150 connected to the first controller 130, the first analog circuit 150 is externally connected to the adapter 200 through an analog signal terminal BA, the battery pack 100 sends its own real-time status information and discharging capability to the adapter 200, and the first controller 130 inside the battery pack 100 also detects its own status of the battery pack 100, determines whether the current battery pack 100 is suitable for continuing discharging, generates a second analog signal representing the determination result, and sends the second analog signal to the adapter 200 through the first analog circuit 150.

Correspondingly, the adapter 200 further includes a second analog circuit 230 connected to the second controller 220, wherein the second analog circuit 230 is configured to receive a second analog signal sent by the first analog circuit 150 in the battery pack 100 and send the second analog signal to the second controller 220. The provision of the second analog circuit 230 and the first analog circuit 150 facilitates the transfer of analog quantities between the battery pack 100 and the adapter 200.

In one embodiment, the first signal terminal includes a communication signal terminal and an analog signal terminal, and the first type information includes a first digital signal and a second analog signal. That is, the battery pack simultaneously transmits a digital signal for transmitting real-time status information and discharge capability and an analog signal for transmitting information on whether or not to allow the discharge to be continued to the adapter.

In summary, in this embodiment, the first signal terminal may only include the communication signal terminal, may only include the analog signal terminal, and may also include both the communication signal terminal and the analog signal terminal, that is, the battery pack may only send a digital signal, may only send an analog signal, and may also include both a digital signal and an analog signal.

In one embodiment, the second controller 220 is configured to analyze the first type information and convert the first type information into a third analog signal for characterizing whether the discharging is allowed to continue, the second signal terminal includes an analog signal terminal, and the second type information includes the third analog signal.

In this embodiment, the second controller 220 analyzes the first digital signal and/or the second analog signal to generate a third analog signal suitable for recognition by the power tool, and the third analog signal is used for indicating whether to allow the discharging to continue, so that the signal conversion between the battery pack and the power tool can be realized. In practical applications, the second controller may convert the first digital signal into a third analog signal, may convert the second analog signal into a third analog signal, and may generate the third analog signal after comprehensively analyzing the first digital signal and the second analog signal.

When the first type information includes the first digital signal and the second analog signal at the same time, the second controller performs comprehensive analysis on the first digital signal and the second analog signal, finally determines whether the battery pack 100 currently allows to continue discharging, generates a third analog signal suitable for the electric tool 300 to identify as a representation determination result, and sends the third analog signal to the electric tool 300 as the converted second type information. The advantage of comprehensively analyzing the first digital signal and the second analog signal is that it is inevitable to determine whether the battery pack 100 allows continuous discharging according to the first digital signal alone or the second analog signal alone, and there is an error, for example, if the real-time status information transmitted by the battery pack 100 is incorrect, if the adapter determines only according to the first digital signal, the electric tool 300 cannot accurately control its own status; for example, if the battery pack 100 determines that the self-state is incorrect, the transmitted second analog signal has an error, and the electric power tool 300 cannot accurately control the self-state if the determination is made only based on the second analog signal. In summary, in this embodiment, the first digital signal and the second analog signal are combined to perform analysis, so that the adapter can determine whether the battery pack is abnormal according to any one of the first digital signal and the second analog signal, and the dual redundancy design enables the adapter to accurately identify the battery pack when the battery pack is abnormal, and transmits the abnormality to the tool, so that the tool stops working, and the battery pack is protected in time.

Referring to fig. 2, the adaptor 200 further includes a third analog circuit 240 connected to the second controller 220, wherein the third analog circuit 240 is configured to convert the determination result of the first digital signal and the second analog signal by the second controller 220 into a third analog signal suitable for recognition by the power tool 300. Correspondingly, the electric tool 300 may include a fourth analog circuit 310 and a third controller 320, the fourth analog circuit 310 may receive a third analog signal transmitted by the third analog circuit 240 of the adaptor 200 through the analog signal terminal TV, and transmit the third analog signal to the third controller 320, and the third controller 320 may determine the operating state of the electric tool 300 according to the third analog signal.

In one embodiment, when the adapter 200 determines that at least one of the first digital signal and the second analog signal is not suitable for continuing the discharge, a third analog signal for indicating that the discharge is not allowed to continue is generated, otherwise, a third analog signal for indicating that the discharge is allowed to continue is generated.

That is, as long as one of the first digital signal and the second analog signal represents that the battery pack 100 is not suitable for continuous discharge, the current battery pack 100 is determined not to be suitable for continuous discharge, and the battery pack 100 is not allowed to be continuously discharged; only if the first digital signal and the second analog signal both indicate that the battery pack 100 is suitable for continuous discharge, the current battery pack 100 is determined to be suitable for continuous discharge, and the battery pack 100 is allowed to be continuously discharged. This ensures that the battery pack 100 and the electric power tool 300 can be operated in a safe state, and improves the reliability of use of both.

In one embodiment, the third analog signal indicative of the disallowance of continued discharge includes a high temperature analog signal or a low temperature analog signal suitable for recognition by the power tool 300, and the third analog signal indicative of the allowance of continued discharge includes a normal temperature analog signal suitable for recognition by the power tool 300.

In practical applications, the negative electrode of the battery pack 100 is connected to a MOS transistor, and the MOS transistor is connected to a temperature sensor, wherein the temperature sensor may be an NTC resistor, or an NTC resistor is simulated by a fixed resistor, and the NTC resistor is a sensor for detecting temperature. The temperature sensor is connected to the external connection terminal of the third analog circuit 240. When the voltage of the battery pack 100 is normal, the second controller 220 controls the MOS transistor to be closed, the external connection terminal of the third analog circuit 240 transmits a real-time resistance signal of the temperature sensor to the electric tool 300, and the third controller 320 in the electric tool 300 determines whether the temperature of the battery pack 100 is normal based on the resistance signal, so as to control the electric tool 300 to operate. When the voltage is low, the second controller 220 controls the MOS transistor to be turned off, and at this time, a signal transmitted from the external connection terminal of the third analog circuit 240 to the electric tool 300 is an infinite resistance, and when the third controller 320 receives the infinite resistance signal, it is determined that the signal is a low-temperature signal, thereby stopping the discharge of the battery pack 100. Therefore, when the battery pack 100 has voltage abnormality such as undervoltage, the third analog signal is represented as a low-temperature analog signal, and when the temperature of the battery pack 100 is abnormal, the third analog signal is represented as a high-temperature analog signal or a low-temperature analog signal, that is, the abnormality of the temperature and the voltage can be transmitted to the electric tool 300 through the third analog signal.

In one embodiment, the third analog signal includes two types of signals, which are respectively transmitted to the power tool 300 through two different analog signal terminals, and correspondingly, the power tool 300 is also provided with two corresponding analog signal terminals for receiving the two different types of analog signals. Illustratively, the first type signal is a high temperature analog signal or a low temperature analog signal for characterizing that the discharge is not allowed to continue and is suitable for the power tool 300 to recognize, or a normal temperature analog signal for characterizing that the discharge is allowed to continue and is suitable for the power tool 300 to recognize; the second type signal is a low voltage signal for characterizing that the discharge is not allowed to continue and is suitable for the power tool 300 to recognize, or a normal voltage signal for characterizing that the discharge is allowed to continue and is suitable for the power tool 300 to recognize. The normal voltage signal and the low voltage signal refer to specific voltage values, wherein the normal voltage signal may be a voltage value of the whole pack allowed to be discharged, which is calculated according to the lowest allowed discharge voltage value Vcell of a single battery cell, that is, a product between the number N of the battery cells connected in series and the lowest allowed discharge voltage value of the single battery cell, N × Vcell; the voltage value of the partial electric core allowed to discharge, which is calculated according to the voltage value of the single electric core allowed to discharge in the battery pack, may also be the product between the number N 'of the partial electric cores in the battery pack and the lowest voltage value of the single electric core allowed to discharge, N' × Vcell, or the lowest voltage value of the single electric core allowed to discharge Vcell. The low voltage signal refers to a voltage signal lower than a normal voltage. The lowest allowable discharge voltage value of a single battery cell can be obtained by inquiring the specification of the battery pack based on the type of the battery cell in the battery pack.

In one embodiment, referring to fig. 3, the second controller 220 is further configured to convert the first digital signal into a fourth analog signal suitable for recognition by the power tool 300 and transmit the fourth analog signal to a second signal terminal of the power tool 300, the second signal terminal including an analog signal terminal, for example, a BS terminal in fig. 3, the second type information including the fourth analog signal, the fourth analog signal being used to represent an analog quantity of a discharge capability of the battery pack, the discharge capability of the battery pack including a capacity of the battery pack, a voltage of the battery pack, a type of the battery in the battery pack, a maximum discharge current allowed by the battery pack, and other inherent properties about its own capability.

Specifically, after the adapter 200 receives the first digital signal, in addition to analyzing and determining the first digital signal, the internal second controller 220 and the internal third analog circuit 240 may also convert the information about the discharge capability of the battery pack contained in the first digital signal into a fourth analog signal representing the discharge capability of the battery pack suitable for the electric tool 300 to recognize, and send the fourth analog signal to the electric tool 300 as the second type information, thereby implementing the transmission of the discharge capability of the battery pack 100.

Referring to fig. 3, at this time, the analog signal terminal TV of the power tool receives a third analog signal indicating whether to allow the discharge to be continued, and the analog signal terminal BS of the power tool receives a fourth analog signal indicating the discharge capability of the battery pack. The difference between the scheme of fig. 3 and the scheme of fig. 2 is that a fourth analog signal for representing the discharge capacity of the battery pack is also transmitted in the scheme of fig. 3, so that the electric tool side can know the analog quantity corresponding to the discharge capacity of the battery pack.

In practical application, the external transmission terminal BS corresponding to the fourth analog signal and the external transmission terminal TV corresponding to the third analog signal are independent from each other, and the third analog signal and the fourth analog signal are transmitted to the electric tool through different terminals, which is beneficial to improving the transmission efficiency of each analog signal.

As an alternative embodiment, the adapter 200 may also convert the received first type of information into a digital signal for transmission to the power tool 300. Specifically, the second controller is configured to convert the first type information into a second digital signal and transmit the second digital signal to a second signal terminal, the second signal terminal including a communication signal terminal, and the second type information including the second digital signal. That is, the second controller converts the first digital signal into the second digital signal, or converts the second analog signal into the second digital signal, or synthetically analyzes the first digital signal and the second analog signal to generate the second digital signal.

The first digital signal is based on a first digital communication protocol, and the second digital signal is often based on a second digital communication protocol different from the first digital communication protocol, so that the second controller 220 converts the first digital signal based on the first digital communication protocol into the second digital signal based on the second digital communication protocol, thereby facilitating information identification of the power tool 300.

Specifically, referring to fig. 4, the adapter 200 further includes a third digital communication circuit 250 connected to the second controller 220, the power tool 300 further includes a fourth digital communication circuit 330 connected to the third controller 320, the fourth digital communication circuit 330 is connected to the adapter through a communication signal terminal BE, the third digital communication circuit 250 and the fourth digital communication circuit 330 communicate with each other based on a second digital communication protocol, the third controller 320 converts the first digital signal into a second digital signal, and then sends the second digital signal to the fourth digital communication circuit 330 through the third digital communication circuit 250, thereby implementing transmission of the digital signal. After the first digital signal is converted into the second digital signal, the electric tool identification is facilitated.

As can be seen from the above, the adapter may convert the first type information into at least one of an analog signal for characterizing whether or not to allow continued discharge or a digital signal for characterizing whether or not to allow continued discharge, or a digital signal for characterizing a real-time status of the battery pack, or a digital signal for characterizing a discharge capability of the battery pack, and transmit the converted signal to the power tool.

In one of the embodiments, the communication signal terminal BE can also BE used as a multiplexing terminal, that is, in practical application, the communication signal terminal BE can transfer both analog signals and digital signals. For example, the output of analog quantity of the discharge capacity of the battery pack can be realized, and the output of digital signals representing the real-time state or the discharge capacity of the battery pack or whether the discharge is allowed or not can also be realized. The benefit of this design is that this type of battery pack and adapter combination can be matched to multiple types of power tools. The advantage is particularly embodied in that the same company has the electric tool with the same interface but with the upgraded performance, and the combination of the battery pack and the adapter in the embodiment can be suitable for the electric tool before the upgrade of the company and also suitable for the electric tool after the upgrade of the company. An optional upgrade condition is that the number and types of interfaces of the electric tool before the upgrade and the electric tool after the upgrade are not changed, but the electric tool before the upgrade does not have the digital communication function, and the electric tool after the upgrade has the digital communication function. Specifically, the electric power tool before the upgrade cannot receive a digital signal through the communication signal terminal BE, but can receive an analog signal through the communication signal terminal BE, since it does not have a communication function. The upgraded electric tool has a digital communication function, and directly communicates with the communication signal terminal BE so as to acquire relevant information according to the digital signal transmitted in the communication process. In one embodiment, the second controller may simultaneously convert the first type information into a third analog signal and a second digital signal, and transmit the third analog signal and the second digital signal to the second signal terminal, where the second signal terminal includes the analog signal terminal and the communication signal terminal, and the second type information includes the third analog signal and the second digital signal. That is, the electric tool can receive the third analog signal and the second digital signal at the same time, and the dual redundancy design can avoid the misjudgment of the electric tool caused by the failure or the error in the transmission of any one of the analog signal and the digital signal. The third analog signal may be an analog signal for indicating whether to allow the continuous discharge, and the second digital signal may be at least one of a digital signal for indicating the real-time status information of the battery pack, the discharge capability, and whether to allow the continuous discharge.

Referring to fig. 4, the analog signal terminal TV of the power tool receives a third analog signal for indicating whether to allow the continuous discharge, the digital signal terminal BE of the power tool receives a second digital signal for indicating real-time status information of the battery pack, including the temperature of the battery pack 100, the voltage of each battery, the total voltage, etc., the discharge capability of the battery pack including the battery type, the capacity of the battery pack, the voltage of the battery pack, the maximum discharge current allowed by the battery pack, etc., the discharge capability of the power tool is the same as the discharge capability of the battery pack. The difference between the scheme of fig. 4 and the scheme of fig. 2 is that a second digital signal representing at least one of real-time status information, discharge capability and whether to allow continuous discharge of the battery pack is also transmitted in the scheme of fig. 4, so that the electric tool side knows the digital quantity corresponding to the specific status information of the battery pack.

In one embodiment, the power tool 300 is further configured to collect current information of a working circuit formed by the battery pack 100, the adapter 200, and the power tool 300, and control its operation based on the current information and the second type of information. That is, the electric power tool 300 may perform comprehensive judgment in combination with the collected current information on the work circuit, in addition to controlling its own work according to the second type information converted from the first type information transmitted from the battery pack 100.

The power tool may include a first current sampling unit for collecting current information on a working circuit formed by the battery pack, the adapter, and the power tool, and a third controller for controlling the power tool to operate based on the current information and the second type of information.

Specifically, referring to fig. 2 to 4, a sampling resistor R1 may be connected in series between two charging terminals of the power tool 300, the first current sampling unit is the sampling resistor R1, the third controller 320 collects information collected by the sampling resistor, and further determines the current magnitude in the discharge loop, if the current is in an abnormal state, it represents that the battery pack 100 is no longer suitable for continuing to discharge, and in practical application, the current sampling unit may be set as: and stopping the discharging if any one of the current information and the second type information indicates that the discharging cannot be continued.

In this embodiment, referring to fig. 2 to 4, the power supply circuit 340 and the motor control unit 350 are further included in the electric power tool 300, the power supply circuit 340 supplies power to the third controller 320 and the fourth analog circuit 310, the motor control unit 350 is connected in series in the working circuit and is also connected to the third controller 320, and the third controller 320 controls the electric power tool 300 by controlling the working state of the motor control unit 350.

Specifically, in practical applications, after the battery pack 100, the adapter 200 and the electric tool 300 are connected, the start button of the electric tool 300 is controlled to be pressed, the power circuit 340 in the electric tool 300 operates to supply power to the third controller 320 and the fourth analog circuit 310, the fourth analog circuit 310 is controlled to generate an activation signal and send the activation signal to the second controller 220 through the third analog circuit 240 in the adapter 200 to activate the second controller 220 to operate, and the second controller 220 sends the activation signal to the first analog circuit 150 in the battery pack 100 through the second analog circuit 230 and further to the first controller 130 to activate the first controller 130 to operate. After the first controller 130 is activated, the state information of the battery pack 100 detected by the battery monitoring system 120 is obtained, so as to perform the above-described information transmission and control the start and stop of the motor control unit 350.

In practical applications, the analog signal terminal TV may be a single terminal or a plurality of terminals. For example, in one embodiment, when the transmission of the activation signal and the transmission of the third analog signal between the power tool and the adapter need to be completed, the analog signal terminal TV may be a plurality of terminals and transmit the activation signal and the third analog signal through different terminals. In another embodiment, when the transmission of the activation signal and the transmission of a third analog signal between the power tool and the adapter need to be completed, the analog signal terminal TV may be a plurality of terminals, wherein the third analog signal includes two types of signals, such as a signal for allowing the discharging to be continued and a signal for determining the voltage of a portion of the battery cell in the battery pack. In this embodiment, one analog signal terminal is used to transmit an activation signal, another analog signal terminal is used to transmit a signal indicating whether to allow continuous discharge, and another analog signal terminal is used to transmit a signal indicating the voltage of a portion of a cell in a battery pack. Or one analog signal terminal is used for transmitting an activation signal and a signal for judging whether to allow continuous discharging, and the other analog signal terminal is used for transmitting a signal of the voltage of a part of the battery cells in the battery pack. Or one analog signal terminal is used for transmitting an activation signal and a signal of the voltage of a part of the battery cell in the battery pack, and the other analog signal terminal is used for transmitting a signal of whether to allow continuous discharging.

Three different embodiments are described below with reference to the figures, respectively:

the first embodiment:

with reference to fig. 2 and 7, the electric tool is connected to the battery pack through the corresponding adapter, and then the start button of the electric tool is pressed, so that the power circuit in the electric tool operates to supply power to the third controller and the fourth analog circuit; the fourth analog circuit sends an activation signal to a second controller in the adapter through the TV end to activate the second controller; the second controller sends the activation signal to the battery pack through the second analog circuit and the BA end so as to activate the first controller in the battery pack.

After the first controller is activated, the real-time state information of the battery pack monitored by the battery monitoring system is collected, the real-time state information comprises a single-pack state and a whole-pack state, the state information of the battery pack is sent to a second digital communication circuit of the adapter through a first digital communication circuit and a communication signal terminal BD in the form of a first digital signal, and the second digital communication circuit sends the received first digital signal to a second controller in the adapter. Meanwhile, the first controller in the battery pack can judge the acquired state information of the battery pack, generate a second analog signal representing whether the battery pack is suitable for continuous discharging or not, and send the second analog signal to a second analog circuit of the adapter through the first analog circuit and an analog signal terminal BA, and the second analog circuit sends the received second analog signal to a second controller in the adapter;

after the second controller acquires the first digital signal and the second analog signal, the first digital signal and the second analog signal can be comprehensively analyzed, whether the battery pack is allowed to continue to discharge at present is judged, a third analog signal representing a judgment result is generated, and the third analog signal is sent to a fourth analog circuit of the electric tool through the third analog circuit and an analog signal terminal TV;

the electric tool also comprises a sampling resistor R1, the third controller acquires sampling data of the sampling resistor R1 to obtain current information on a loop, and comprehensively judges whether the motor control unit is allowed to work or not by combining the third analog signal and the current information.

The second embodiment:

with reference to fig. 3 and 8, the present embodiment is different from the first embodiment in that the second controller further converts the first digital signal into a fourth analog signal, and transmits an analog quantity of the discharge capability (i.e., the fourth analog signal) to a fourth analog circuit of the electric power tool through the third analog circuit and the analog signal terminal BS, and then to the third controller, whereby the electric power tool can receive the analog quantity of the battery pack discharge capability in addition to the third analog signal of whether to permit the continued discharge.

Third embodiment:

with reference to fig. 4 and 9, the present embodiment is different from the first embodiment in that the second controller further converts the first digital signal into a second digital signal, and transmits at least one of the real-time status information of the battery pack, the discharge capability, and the digital signal indicating whether to allow the continuous discharge (i.e., the second digital signal) to the fourth digital communication circuit of the power tool through the third digital communication circuit and the communication signal terminal BE, and then transmits the digital signal to the third controller, so that the power tool can receive at least one of the real-time status information of the battery pack, the discharge capability, and the digital signal indicating whether to allow the continuous discharge, in addition to the third analog signal indicating whether to allow the continuous discharge.

Example two

The present embodiment provides an electric tool system, which includes a single battery pack, a plurality of adapters, and a plurality of electric tools, where the single battery pack can be connected to different electric tools through different adapters at different times, and each adapter corresponds to each electric tool one to one.

The battery package includes positive terminal, negative terminal and first signal terminal, and each electric tool includes positive terminal, negative terminal and second signal terminal, and each adapter all includes the first end of being connected with the battery package and the second end of being connected with the electric tool that corresponds.

The battery pack monitors the state of a single-section battery cell and/or the state of the whole battery pack to obtain first type information, and the first type information is sent to the adapter through the first signal terminal; the adapter converts the first type information into second type information suitable for the electric tool to recognize and sends the second type information to the second signal terminal, and the electric tool controls the electric tool to work based on the second type information input by the second signal terminal.

For example, referring to fig. 5, the power tool system includes a single battery pack 100, and the battery pack 100 may be connected to a first tool 301 through a first adapter 201 in a first state, connected to a second tool 302 through a second adapter 202 in a second state, and connected to a third tool 303 through a third adapter 203 in a third state. Of course, the adapters may be designed to accommodate more kinds of tools, and only three kinds of adapters and the electric tools corresponding to the adapters are described as examples.

The battery package includes positive terminal, negative terminal and first signal terminal, first instrument includes positive terminal, negative terminal and first sub-signal terminal, the second instrument includes positive terminal, negative terminal and second sub-signal terminal, the third instrument includes positive terminal, negative terminal and third sub-signal terminal, first adapter includes the first end of being connected with the battery package and the second end of being connected with first instrument, the second adapter includes the first end of being connected with the battery package and the second end of being connected with the second instrument, the third adapter includes the first end of being connected with the battery package and the second end of being connected with the third instrument.

The battery pack monitors the state of a single-section battery cell and/or the state of the whole battery pack to obtain first type information, and the first type information is respectively sent to the first adapter, the second adapter and the third adapter through the first signal terminal; the first adaptor 201 converts the first type information into first subtype information suitable for the first tool 301 to recognize, and transmits the first subtype information to the first sub-signal terminal, and the first tool 301 controls its own operation based on the first subtype information inputted from the first sub-signal terminal; the second adapter converts the first type information into second subtype information suitable for being recognized by a second tool and sends the second subtype information to a second sub-signal terminal, and the second tool controls the second tool to work on the basis of the second subtype information input by the second sub-signal terminal; the third adapter converts the first type information into third subtype information suitable for the third tool to recognize and transmits the third subtype information to the third sub-signal terminal, and the third tool controls itself to operate based on the third subtype information inputted from the third sub-signal terminal.

The first tool 301, the second tool 302, and the third tool 303 are different types or brands of electric tools 300, and the present embodiment includes a first adapter 201, a second adapter 202, and a third adapter 203 respectively matched with the first tool 301, the second tool 302, and the third tool 303, and the first adapter 201, the second adapter 202, and the third adapter 203 can be connected to the same battery pack 100 in a matching manner. Since the first tool 301, the second tool 302 and the third tool 303 are different in information types and are applied differently, the first tool 301 corresponds to the first subtype information, the second tool 302 corresponds to the second subtype information, and the third tool 303 corresponds to the third subtype information, the first type information sent by the battery pack 100 is converted into the first subtype information suitable for the first tool 301, the second subtype information suitable for the second tool 302 and the third subtype information suitable for the third tool 303 through the adapters 200, and each tool can control its own operation according to the converted information.

Therefore, the battery pack 100 can be matched and connected with the electric tools 300 of the same type through the adapter 200, the adapter 200 can convert the first type information sent by the battery pack 100 into information suitable for being recognized by the electric tools 300 and send the information to the electric tools 300, so that the electric tools 300 can know the real-time state information of the battery pack and further control the working states of the battery pack and the battery pack, fine over-discharge protection of the battery pack based on the real-time state information of the battery pack can be realized, and the service life of the battery pack is effectively prolonged.

The single cell state and/or the whole cell state of the battery pack 100 may include at least one of a temperature of the battery pack 100, a voltage of each battery, and a total voltage.

In one embodiment, the first signal terminal comprises a communication signal terminal and the first type of information comprises a first digital signal.

In one embodiment, the adapter includes a second controller for analyzing the first type of information and converting the first type of information into a third analog signal for characterizing whether or not to allow the discharge to continue, the second signal terminal including an analog signal terminal, the second type of information including the third analog signal.

In one embodiment, the adapter includes a second controller for converting the first type of information into a second digital signal and transmitting the second digital signal to a second signal terminal, the second signal terminal including a communication signal terminal, the second type of information including the second digital signal.

In one embodiment, the second controller of the adapter is further configured to convert the first digital signal into a fourth analog signal suitable for recognition by the power tool and to send the fourth analog signal to the second signal terminal, and the second type of information includes the fourth analog signal.

In one embodiment, the adapter includes a second controller for converting the first type of information into a third analog signal and a second digital signal and transmitting the third analog signal and the second digital signal to the second signal terminal, the second signal terminal including an analog signal terminal and a communication signal terminal, the second type of information including the third analog signal and the second digital signal.

In summary, in practical applications, the following situations can be included:

the battery pack sends a first digital signal to the adapter, and the adapter converts the first digital signal into a third analog signal and sends the third analog signal to the electric tool; the battery pack sends a second analog signal to the adapter, and the adapter converts the second analog signal into a third analog signal and sends the third analog signal to the electric tool; the battery pack simultaneously sends a first digital signal and a second analog signal to the adapter, and the adapter converts the first digital signal and the second analog signal into a third analog signal to be sent to the electric tool;

the battery pack sends the first digital signal to the adapter, and the adapter converts the first digital signal into a second digital signal to send to the electric tool; the battery pack sends a second analog signal to the adapter, and the adapter converts the second analog signal into a second digital signal and sends the second digital signal to the electric tool; the battery pack simultaneously sends a first digital signal and a second analog signal to the adapter, and the adapter converts the first digital signal and the second analog signal into a second digital signal to be sent to the electric tool;

the battery pack sends the first digital signal to the adapter, and the adapter converts the first digital signal into a second digital signal and a third analog signal to send to the electric tool; the battery pack sends a second analog signal to the adapter, and the adapter converts the second analog signal into a second digital signal and a third analog signal to send to the electric tool; the battery pack simultaneously sends a first digital signal and a second analog signal to the adapter, and the adapter converts the first digital signal and the second analog signal into a second digital signal and a third analog signal to be sent to the electric tool;

the battery pack sends the first digital signal to the adapter, and the adapter converts the first digital signal into a third analog signal and a fourth analog signal to send to the electric tool; the battery pack sends the first digital signal and the second analog signal to the adapter, and the adapter converts the first digital signal and the second analog signal into a third analog signal and a fourth analog signal to be sent to the electric tool.

The electric tool system provided by the embodiment and the electric tool system provided by the first embodiment belong to the same utility model concept, and for the specific content of the electric tool system provided by the embodiment, reference may be made to the specific description in the first embodiment, which is not repeated herein.

EXAMPLE III

The present embodiment provides a power tool system including a battery pack 100 including a positive terminal, a negative terminal, and a first signal terminal, an adapter 200 including a first end connected to the battery pack and a second end connected to the power tool, and a power tool 300 including a positive terminal and a negative terminal;

the adapter 200 determines whether to allow the battery pack 100 to continue discharging according to the first type information; and controls the on/off of a working circuit formed by the battery pack 100, the adapter 200 and the electric tool 300 according to the judgment result.

In the electric tool system, the single battery pack 100 can be connected with the multiple electric tools 300 in a matching manner through the multiple adapters 200, so that the utilization rate of the battery pack 100 is improved, meanwhile, the adapter 200 can judge whether the battery pack 100 is allowed to continue to discharge or not based on the first type information sent by the battery pack 100, and control the on-off of a working circuit formed by the battery pack 100, the adapter 200 and the electric tool 300 according to the judgment result, namely, the adapter 200 can control the outward discharge process of the battery pack 100 in time according to the state of the battery pack 100, so that the safety and the service life of the electric tool 300 and the battery pack 100 are ensured.

The main difference between the present embodiment and the first embodiment is that, in the present embodiment, after analyzing and determining the first type of information, the adapter 200 directly controls the on/off of the working circuit, and further controls the working state of the electric tool 300, without converting the first type of information into the second type of information.

The self single cell state and/or the whole pack state of the battery pack 100 may include at least one of a temperature, a voltage and a total voltage of each battery of the battery pack 100, and a discharge capacity (information such as capacity, voltage, battery type, etc.).

In one embodiment, the first signal terminal includes a communication signal terminal, the first type information includes a first digital signal, and the adapter 200 includes a second controller, which is configured to analyze the first digital signal and generate a first determination result indicating whether it is appropriate to continue discharging, and control the operation of the work circuit formed by the battery pack 100, the adapter 200, and the power tool 300 based on the first determination result.

Specifically, with respect to the internal structure of the battery pack 100, reference may be made to the detailed description in the first embodiment, which is not repeated herein. After acquiring the first digital signal, the second digital communication circuit 210 in the adapter 200 sends the first digital signal to the second controller 220, the second controller 220 analyzes the first digital signal, determines whether the current battery pack 100 is suitable for continuous discharge, generates a first determination result, switches on the working circuit if the first determination result is suitable for continuous discharge, and switches off the working circuit if the first determination result is unsuitable for continuous discharge.

In one embodiment, the first type information includes a second analog signal, the second analog signal is used for indicating whether the battery pack is suitable for continuous discharge, and the second controller is used for analyzing the second analog signal and generating a second judgment result for indicating whether the battery pack is suitable for continuous discharge, and controlling the on/off of a working circuit formed by the battery pack 100, the adapter 200 and the electric tool 300 based on the second judgment result.

Specifically, the first controller 130 in the battery pack 100 also detects the self-state of the battery pack 100, determines whether the current battery pack 100 is suitable for continuous discharging, generates a second analog signal representing the determination result, and sends the second analog signal to the adapter 200 through the first analog circuit 150. After receiving the second analog signal, the adaptor 200 generates a second determination result for ensuring whether the second analog signal is suitable for continuing the discharge, and switches on the working circuit if the second determination result is suitable for continuing the discharge, and switches off the working circuit if the second determination result is not suitable for continuing the discharge.

As an alternative, the second controller 220 may consider the first determination result and the second determination result together, and disconnect the working circuit if at least one of the first determination result and the second determination result is not suitable for continuing the discharge, and only connect the working circuit if both the first determination result and the second determination result are suitable for continuing the discharge. Therefore, the situation that the adapter 200 cannot accurately control the working state of the electric tool 300 due to the error in information transmission can be effectively avoided.

In one embodiment, referring to fig. 6, the adapter 200 includes a switch circuit 260, the switch circuit 260 is disposed on the working circuit, and the second controller controls on/off of the switch circuit 260 according to the determination result. Specifically, the second controller 220 is connected to a switch circuit, and the switch circuit 260 may be an MOS switch circuit 260, and when the determination result is that it is not suitable for continuing discharging, the MOS switch circuit 260 is turned off to ensure that the working circuit is turned off, otherwise, the MOS switch circuit 260 is turned on to ensure that the working circuit is turned on.

In one embodiment, the adaptor 200 is further configured to collect current information of the working circuit, and control on/off of the working circuit based on the current information and the determination result.

Specifically, the adapter may be provided with a second current sampling unit, for example, a sampling resistor R2 connected in series to the working circuit is arranged in the adapter 200, the sampling resistor R2 is connected to the second controller 220, information collected by the sampling resistor is collected by the second controller 220, and then the current magnitude in the discharge circuit is determined, if the current is in an abnormal state, it represents that the battery pack 100 is no longer suitable for continuing to discharge, and in practical application, the current sampling unit may be set as: and if any one of the current information and the judgment result represents that the discharge cannot be continued, stopping the discharge.

In this embodiment, the adapter 200 is further provided with a load activation circuit 270, when the battery pack 100 and the adapter 200 are connected to the power tool 300, the load activation circuit 270 generates an activation signal by itself, and sends the activation signal to the second controller 220 to activate the second controller 220, the second controller 220 sends the activation signal to the first controller 130 through the second analog circuit 230 and the first analog circuit 150 to activate the first controller 130, and after the first controller 130 is activated, the basic information of the battery pack 100 detected by the battery monitoring system 120 is acquired, so as to perform the above-described signal transmission, analysis, judgment and control processes.

For specific details of the electric tool system provided in this embodiment, reference may be made to the detailed description in the first embodiment, and details are not repeated herein.

One embodiment is described below with reference to fig. 6:

referring to fig. 6 and 10, first, the power tool is connected to the battery pack through the corresponding adapter, the load activation circuit in the adapter is activated, an activation signal is sent to the second controller, the second analog circuit in the adapter operates, and the activation signal is sent to the first controller in the battery pack through the BA terminal. Specifically, when the battery package is in idle state, the first controller in the battery package is in dormant state to reduce its power consumptive to the battery package when out of work, avoid the battery package to damage because of putting excessively, when electric tool inserts the battery package, need the battery package work, at this moment, just can activate the first controller of battery package, in order to awaken up the battery package and get into operating condition.

After the first controller is activated, the real-time state information of the battery pack monitored by the battery monitoring system is collected, the real-time state information comprises a single-pack state and a whole-pack state, the state information of the battery pack is sent to a second digital communication circuit of the adapter through a first digital communication circuit and a communication signal terminal BD in the form of a first digital signal, and the second digital communication circuit sends the received first digital signal to a second controller in the adapter. Meanwhile, the first controller in the battery pack can judge the acquired state information of the battery pack, generate a second analog signal representing whether the battery pack is suitable for continuous discharging or not, and send the second analog signal to a second analog circuit of the adapter through the first analog circuit and the analog signal terminal BA, and the second analog circuit sends the received second analog signal to a second controller in the adapter.

After the second controller acquires the first digital signal and the second analog signal, the first digital signal and the second analog signal can be comprehensively analyzed, whether the battery pack is allowed to continue discharging at present is judged, if discharging is allowed, the second controller controls the switch circuit to be closed, the electric tool obtains the electric energy of the battery pack, a starting button of the electric tool is pressed, and if discharging is not allowed, the switch circuit is controlled to be opened.

In addition, the adapter further comprises a sampling resistor R2, the electric tool further comprises a sampling resistor R1, the second controller can acquire sampling data of the sampling resistor R2 to obtain current information on a loop, and if the current information is judged to be abnormal, the switch circuit is controlled to be disconnected, and discharging of the battery pack is stopped; the third controller can also obtain the sampling data of the sampling resistor R1 to obtain the current information on the loop, and if the current information is judged to be abnormal, the third controller can also control the motor control unit to stop working. And if the current information is normal, keeping the motor control unit in the electric tool to work normally.

Example four

The present embodiment provides an adapter 200, and referring to fig. 1-4, the adapter 200 is used to connect a battery pack 100 and a power tool 300. The adapter 200 in this embodiment is suitable for the electric power tool 300 equipped with the positive and negative terminals (B +, B-) and the analog signal Terminal (TV), the electric power tool equipped with the positive and negative terminals (B +, B-) and the analog signal terminal (TV, BS), the electric power tool equipped with the positive and negative terminals (B +, B-), the analog signal Terminal (TV), and the communication signal terminal (BE), or the electric power tool equipped with the positive and negative terminals (B +, B-), and the communication signal terminal (BE).

the adapter converts the first type information into second type information suitable for being recognized by the electric tool and sends the second type information to a second signal terminal of the electric tool;

The adapter 200 can convert the first type information sent by the battery pack 100 into the second type information suitable for each electric tool 300 to identify and send the second type information to the electric tools 300, so that the electric tools 300 can control the self-operation according to the second type information, and the adapter 200 can convert the first type information about the battery pack state (including the single cell state and/or the whole pack state) sent by the battery pack 100 into the second type information suitable for each electric tool 300 to identify and send the second type information to the electric tools 300, so that the electric tools 300 can know the real-time state information of the battery pack, and further can control the self-operation and the operation state of the battery pack according to the second type information, thereby realizing the refined over-discharge protection of the battery pack based on the real-time state information of the battery pack, and effectively prolonging the service life of the battery pack.

The self single cell state and/or the whole pack state of the battery pack 100 may include at least one of a temperature of the battery pack 100, a voltage of each battery, and a total voltage.

In one embodiment, the first signal terminal comprises an analog signal terminal, and the first type information comprises a second analog signal used for representing whether the discharging is suitable to be continued.

In one embodiment, the adapter includes a second controller for analyzing the first digital signal and the second analog signal, generating a third analog signal indicative of whether or not to allow the discharge to continue, and sending the third analog signal to a second signal terminal, the third analog signal being suitable for recognition by the power tool 300, the second signal terminal including an analog signal terminal, and the second type information including the third analog signal.

In one embodiment, the second controller is further configured to convert the first type of information into a second digital signal and transmit the second digital signal to a second signal terminal, the second signal terminal including a communication signal terminal, the second type of information including the second digital signal.

The adapter 200 provided in the present embodiment and the adapter 200 in the electric tool system provided in the first embodiment belong to the same utility model concept, and for the specific content of the adapter 200 provided in the present embodiment, reference may be made to the specific description in the first embodiment, which is not described herein again.

EXAMPLE five

The present embodiment provides an adapter 200, and referring to fig. 6, the adapter 200 is used to connect the battery pack 100 and the power tool 300. The adapter 200 in this embodiment is suitable for the electric power tool 300 equipped with the positive and negative charging terminals (B +, B-).

The adapter 200 and the adapter 200 can judge whether to allow the battery pack 100 to continue discharging based on the first type information sent by the battery pack 100, and control the on-off of a working loop formed by the battery pack 100, the adapter 200 and the electric tool 300 according to the judgment result, that is, the adapter 200 can control the discharging process of the battery pack 100 to the outside according to the state of the battery pack 100 in time, so as to ensure the safety and the service life of the electric tool 300 and the battery pack 100.

In one embodiment, the first signal terminal includes a communication signal terminal, the first type information includes a first digital signal, and the adapter includes a second controller, which is configured to analyze the first digital signal and generate a first determination result indicating whether it is appropriate to continue discharging, and control on/off of a working circuit formed by the battery pack 100, the adapter 200, and the power tool 300 based on the first determination result.

In one embodiment, the first signal terminal includes an analog signal terminal, the first type information includes a second analog signal, and the second controller is configured to analyze the second analog signal and generate a second determination result indicating whether it is appropriate to continue discharging, and control the operation of the work circuit formed by the battery pack 100, the adapter 200, and the power tool 300 based on the second determination result.

In one embodiment, the second controller is configured to analyze the first determination result and the second determination result, generate a third determination result indicating whether to allow the continuous discharge, and control the on/off of the working circuit based on the third determination result.

In one embodiment, the adapter 200 includes a switch circuit 260, the switch circuit 260 is disposed on the working circuit, and the second controller controls the on/off of the switch circuit 260 according to the determination result.

Specifically, the adapter may include a second current sampling unit, the second current sampling unit is configured to collect current information of the working circuit, and the second controller controls on/off of the working circuit based on the current information and the determination result.

The adapter 200 provided in this embodiment and the adapter 200 in the electric power tool system provided in the third embodiment belong to the same utility model concept, and for the specific content of the adapter 200 provided in this embodiment, reference may be made to the specific description in the third embodiment, which is not described herein again.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A power tool system comprising a battery pack including a positive terminal, a negative terminal, and a first signal terminal, an adapter including a first end connected to the battery pack and a second end connected to the power tool, and a power tool including a positive terminal, a negative terminal, and a second signal terminal;

2. The power tool system of claim 1, wherein the first signal terminal comprises a communication signal terminal and the first type of information comprises a first digital signal.

3. The power tool system of claim 1, wherein the first signal terminal comprises an analog signal terminal and the first type of information comprises a second analog signal.

4. The power tool system of claim 1, wherein the first signal terminal includes a communication signal terminal and an analog signal terminal, and the first type of information includes a first digital signal and a second analog signal.

5. The power tool system of any of claims 2-4, wherein the adapter includes a second controller configured to analyze the first type of information and convert the first type of information into a third analog signal indicative of whether continued discharge is permitted, the second signal terminal including an analog signal terminal, the second type of information including the third analog signal.

6. The power tool system of claim 5, wherein when the second controller determines that at least one of the first digital signal and the second analog signal is indicative of unsuitability for continued discharge, a third analog signal is generated indicative of non-permission for continued discharge, and otherwise a third analog signal is generated indicative of permission for continued discharge.

7. The power tool system of claim 6, wherein the third analog signal indicative of the disallowance of continued discharge comprises a high temperature analog signal or a low temperature analog signal suitable for identification by the power tool, and the third analog signal indicative of the allowance of continued discharge comprises a normal temperature analog signal suitable for identification by the power tool.

8. The power tool system of claim 2 or 4, wherein the adapter includes a second controller for converting the first digital signal into a fourth analog signal suitable for recognition by the power tool and sending the fourth analog signal to the second signal terminal, the second signal terminal including an analog signal terminal, the second type of information including the fourth analog signal.

9. The power tool system of any of claims 2-4, wherein the adapter includes a second controller for converting the first type of information into a second digital signal and sending the second digital signal to the second signal terminal, the second signal terminal including a communication signal terminal, the second type of information including the second digital signal.

10. The power tool system of any one of claims 2-4, wherein the adapter includes a second controller for converting the first type of information into third analog and second digital signals and sending the third analog and second digital signals to the second signal terminal, the second signal terminal including an analog signal terminal and a communication signal terminal, the second type of information including the third analog and second digital signals.

11. The power tool system of claim 1, wherein when the power tool is coupled to the battery pack via the adapter, the power tool sends an activation signal to the battery pack via the second signal terminal, the adapter, and the first signal terminal.

12. The power tool system of claim 1, wherein the power tool includes a third controller and a first current sampling unit, the first current sampling unit is configured to collect current information on a work circuit formed by the battery pack, the adapter, and the power tool, and the third controller controls the power tool to work based on the current information and the second type of information.

13. A power tool system comprising a battery pack including a positive terminal, a negative terminal, and a first signal terminal, an adapter including a positive terminal and a negative terminal, and a power tool including a first end connected to the battery pack and a second end connected to the power tool;

14. The power tool system of claim 13, wherein the first signal terminal comprises a communication signal terminal, the first type of information comprising a first digital signal;

15. The power tool system of claim 13, wherein the first signal terminal comprises an analog signal terminal, the first type of information further comprising a second analog signal;

16. The power tool system according to claim 14 or 15, wherein the adapter includes a switch circuit provided on the working circuit, and the second controller controls on/off of the switch circuit according to the determination result.

17. The power tool system of claim 13, wherein the adapter includes a second current sampling unit for collecting current information of the working circuit, and the second controller controls on/off of the working circuit based on the current information and the determination result.

18. An electric tool system, characterized in that the electric tool system comprises a single battery pack, a plurality of adapters and a plurality of electric tools, the single battery pack can be matched and connected with different electric tools through different adapters at different times, and each adapter corresponds to each electric tool one by one;

19. The power tool system of claim 18, wherein the first signal terminal comprises a communication signal terminal and the first type of information comprises a first digital signal.

20. The power tool system of claim 18, wherein the first signal terminal further comprises an analog signal terminal, and the first type of information further comprises a second analog signal.

21. The power tool system of claim 18, wherein the first signal terminal includes a communication signal terminal and an analog signal terminal, and the first type of information includes a first digital signal and a second analog signal.

22. The power tool system of any one of claims 19-21, wherein the adapter includes a second controller configured to analyze the first type of information and convert the first type of information into a third analog signal indicative of whether continued discharge is permitted, the second signal terminal including an analog signal terminal, the second type of information including the third analog signal.

23. The power tool system of any one of claims 19-21, wherein the adapter includes a second controller configured to convert the first type of information into a second digital signal and send the second digital signal to the second signal terminal, the second signal terminal including a communication signal terminal, the second type of information including the second digital signal.

24. The power tool system of any one of claims 19-21, wherein the adapter includes a second controller for converting the first type of information into third analog and second digital signals and sending the third analog and second digital signals to the second signal terminal, the second signal terminal including an analog signal terminal and a communication signal terminal, the second type of information including the third analog and second digital signals.

25. An adapter, wherein the adapter comprises a first end for connecting to a battery pack and a second end for connecting to a power tool;

26. The adapter of claim 25 wherein said first signal terminals comprise communication signal terminals and said first type of information comprises a first digital signal.

27. The adapter of claim 25 wherein said first signal terminal comprises an analog signal terminal and said first type of information comprises a second analog signal.

28. The adapter of claim 25 wherein said first signal terminals comprise communication signal terminals and analog signal terminals, and wherein said first type of information comprises a first digital signal and a second analog signal.

29. The adapter as claimed in any one of claims 26-28, wherein the adapter comprises a second controller for analyzing the first type information and converting the first type information into a third analog signal for characterizing whether or not to allow the discharge to continue and sending the third analog signal to the second signal terminal, wherein the second signal terminal comprises an analog signal terminal and the second type information comprises the third analog signal.

30. An adapter according to any of claims 26-28, characterized in that the adapter comprises a second controller for converting the first type of information into a second digital signal and sending the second digital signal to the second signal terminal, the second signal terminal comprising a communication signal terminal, the second type of information comprising the second digital signal.

31. An adapter according to any of claims 26-28, characterized in that the adapter comprises a second controller for converting the first type of information into third analog signals and second digital signals and sending the third analog signals and second digital signals to the second signal terminals, the second signal terminals comprising analog signal terminals and communication signal terminals, the second type of information comprising the third analog signals and second digital signals.

32. The adapter of claim 25 wherein when the power tool is coupled to the battery pack via the adapter, the adapter transmits an activation signal from the second signal terminal of the power tool to the battery pack via the first signal terminal of the battery pack to activate the battery pack.

33. An adapter, wherein the adapter comprises a first end for connecting to a battery pack and a second end for connecting to a power tool;

34. The adapter of claim 33 wherein said first signal terminals comprise communication signal terminals, said first type of information comprising a first digital signal;

35. The adapter of claim 33 wherein said first signal terminal comprises an analog signal terminal, said first type of information comprising a second analog signal;

36. The adapter as claimed in claim 34 or 35, wherein the adapter comprises a switch circuit disposed on the working circuit, and the second controller controls on/off of the switch circuit according to the determination result.

37. The adapter of claim 33, further comprising a second current sampling unit for collecting current information of the working circuit, wherein the second controller controls on/off of the working circuit based on the current information and the determination result.