WO2022262767A1

WO2022262767A1 - Power tool system

Info

Publication number: WO2022262767A1
Application number: PCT/CN2022/098913
Authority: WO
Inventors: 沈峰; 吕少锋; 陈明明
Original assignee: 苏州宝时得电动工具有限公司
Priority date: 2021-06-16
Filing date: 2022-06-15
Publication date: 2022-12-22
Also published as: CN115483723A; CN117652070A

Abstract

Provided are a power tool system. The power tool system comprises a battery pack (100), an adapter (200), and a power tool (300), and the battery pack (100) is connected to the power tool (300) by means of the adapter (200); the adapter (200) is configured to receive first type information sent by the battery pack (100), convert the first type information into second type information suitable for being identified by the power tool (300), and send the second type information to the power tool (300); the power tool (300) controls its own operation on the basis of the second type information. The power tool (300) can realize information interaction with the same battery pack (100), and adjust its own working state according to the information of the battery pack (100), thereby effectively improving the utilization rate of the battery pack (100), realizing timely adjustment of the working state of the power tool (300), and prolonging the service life of the battery pack (100).

Description

Power Tool System

technical field

The invention relates to the technical field of electric tools, in particular to an electric tool system.

Background technique

With the intensification of market demand for electric tools, various brands of electric tools continue to appear. Generally, each type of electric tool has its own dedicated battery pack. However, because one type of battery pack can only match one type of brand of electric tools, or even a certain type of electric tool under one type of brand, this leads to poor compatibility of battery packs, low utilization rate, and each All kinds of power tools need to produce matching special battery packs, resulting in a great waste of resources.

In view of the above problems, it has been found that an adapter is provided between the battery pack and the electric tool to realize the matching of one type of battery pack with multiple types of electric tools, thereby improving the utilization rate of the battery pack. However, the prior art adapter includes a battery end connected to a battery pack and a tool end connected to a tool. The battery terminal receives the energy of the battery pack, and transmits the energy of the battery pack to the tool through the tool terminal. The tool receives power from the battery pack to start working. However, the battery end of the adapter does not receive the status information transmitted by the battery pack, so the tool end does not transmit the status information of the battery pack to the tool. The tool cannot know the real-time status information of the battery pack, so the tool can only perform extensive over-discharge protection on the battery pack based on the voltage status of the entire battery pack, but cannot fine-tune the battery pack based on the real-time status of the cells in the battery pack over-discharge protection. Long-term use will lead to a significant decrease in the life of the battery pack.

Contents of the invention

Based on this, it is necessary to provide an adapter and an electric tool system to address the above problems.

The present application provides an electric tool system, the electric tool system includes a battery pack, an adapter and an electric tool, the battery pack includes a positive terminal, a negative terminal and a first signal terminal, the electric tool includes a positive terminal, a negative terminal and a second signal terminal, the adapter includes a first end connected to the battery pack and a second end connected to the electric tool;

The battery pack monitors the state of its own single battery cell and/or the state of the whole pack, obtains the first type information, and sends the first type information to the adapter through the first signal terminal;

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

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

In one of the embodiments, the first signal terminal includes a communication signal terminal, and the first type of information includes a first digital signal.

In one of the embodiments, the first signal terminal further includes an analog signal terminal, and the first type information includes 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 of information includes a first digital signal and a second analog signal.

In one of the embodiments, the adapter includes a second controller, the second controller is configured to analyze the second type of information, and convert the first type of information into a first value indicating whether to continue discharging. Three analog signals, the second signal terminal includes an analog signal terminal, and the second type information includes the third analog signal.

In one of the embodiments, when the second controller judges that at least one of the first digital signal and the second analog signal indicates that it is not suitable to continue the discharge, it generates a second signal indicating that the continuation of the discharge is not allowed Three analog signals, otherwise generate a third analog signal for characterizing the continuation of discharge.

In one of the embodiments, the third analog signal used to indicate that continuation of discharge is not allowed includes a high temperature analog signal or low temperature analog signal suitable for the identification of the electric tool, and the third analog signal used to indicate that continuation of discharge is allowed includes an analog signal suitable for The normal temperature analog signal recognized by the power tool.

In one of the embodiments, the adapter includes a second controller, the second controller is used to convert the first digital signal into a fourth analog signal suitable for the recognition of the electric tool, and convert the first digital signal to Four analog signals are sent to the second signal terminal, the second signal terminal includes an analog signal terminal, and the second type information includes the fourth analog signal.

In one of the embodiments, 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 first Two signal terminals, the second signal terminal includes a communication signal terminal, and the second type information includes the second digital signal.

In one of the embodiments, the adapter includes a second controller, the second controller is configured to convert the first type of information into a third analog signal and a second digital signal, and convert the third analog signal into and the second digital signal are sent 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 of the embodiments, when the electric tool is connected to the battery pack through the adapter, the electric tool sends an activation signal to the the battery pack.

In one of the embodiments, the electric tool includes a third controller and a first current sampling unit, and the first current sampling unit is used to collect the working loop formed by the battery pack, the adapter, and the electric tool The third controller controls the electric tool to work based on the current information and the second type information.

In one of the embodiments, the adapter judges whether to allow the battery pack to continue discharging according to the first type information; and controls the working circuit formed by the battery pack, the adapter and the electric tool according to the judgment result on and off.

In one of the embodiments, the priority of the adapter controlling the switching of the working circuit formed by the battery pack, the adapter and the electric tool according to the judgment result is lower than that of the adapter sending the second type information Send to the priority of the second signal terminal.

In one of the embodiments, the first signal terminal includes a communication signal terminal, and the first type of information includes a first digital signal;

The adapter includes a second controller, the second controller analyzes the first digital signal and generates a first judgment result representing whether it is suitable to continue discharging, and controls the battery pack based on the first judgment result , On-off of the working circuit formed by the adapter and the electric tool.

In one of the embodiments, the first signal terminal includes an analog signal terminal, and the first type information further includes a second analog signal;

The adapter includes a second controller, the second controller analyzes the second analog signal and generates a second judgment result representing whether it is suitable to continue discharging, and controls the battery pack based on the second judgment result , On-off of the working circuit formed by the adapter and the electric tool.

In one of the embodiments, the adapter includes a switch circuit, the switch circuit is arranged on the working circuit, and the second controller controls the switching of the switch circuit according to the judgment result.

In one of the embodiments, the adapter includes a second current sampling unit, the second current sampling unit is used to collect the current information of the working loop, and the second controller is based on the current information and the The judgment result controls the on-off of the working circuit.

The present application also provides an electric tool system. The electric tool system includes a single battery pack, several adapters and several electric tools. The single battery pack can connect different adapters to different electric tools at different times. Matching, each of the adapters corresponds to each of the electric tools;

The battery pack includes a positive terminal, a negative terminal, and a first signal terminal, each of the electric tools includes a positive terminal, a negative terminal, and a second signal terminal, and each of the adapters includes a first end connected to the battery pack and a first terminal connected to the battery pack. a second end connected to the corresponding electric tool;

The adapter converts the first type of information into a second type of information suitable for recognition by the electric tool, and sends the second type of information to the second signal terminal, and the electric tool is based on the second The second type of information input by the signal terminal controls its own operation.

In one of the embodiments, the first signal terminal further includes an analog signal terminal, and the first type information further includes a second analog signal.

In one of the embodiments, the adapter includes a second controller, the second controller is configured to analyze the first type of information, and convert the first type of information into a first value for indicating whether to continue discharging. Three analog signals, the second signal terminal includes an analog signal terminal, and the second type information includes the third analog signal.

In one of the embodiments, when the second controller judges that at least one of the first digital signal and the second analog signal indicates that it is not suitable to continue the discharge, it generates a signal indicating that the continuation of the discharge is not allowed A third analog signal, otherwise a third analog signal used to characterize the continuation of the discharge is generated.

The present application also provides an electric tool system, the electric tool system includes a battery pack, an adapter, and an electric tool, the battery pack includes a positive terminal, a negative terminal, and a first signal terminal, and the electric tool includes a positive terminal and a negative terminal , the adapter includes a first end connected to the battery pack and a second end connected to the electric tool;

The adapter judges whether to allow the battery pack to continue discharging according to the first type information; and controls the on-off of the working circuit formed by the battery pack, the adapter and the electric tool according to the judgment result.

In one of the embodiments, 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;

The adapter includes a second controller, the second controller analyzes the first digital signal and/or the second analog signal and generates a third judgment result representing whether it is suitable to continue discharging, and based on the The third judgment result controls the on-off of the working circuit formed by the battery pack, the adapter and the electric tool.

In one embodiment, the adapter includes a switch circuit, the switch circuit is arranged on the working circuit, and the second controller controls the switching of the switch circuit according to the judgment result.

In one of the embodiments, the adapter includes a second current sampling unit, the second current sampling unit is used to collect the current information of the working loop, and the second controller is based on the current information and the judgment As a result, the on-off of the working circuit is controlled.

An adapter comprising a first end connected to a battery pack and a second end connected to an electric tool;

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

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

In one of the embodiments, the adapter includes a second controller, the second controller is configured to analyze the first type of information, and convert the first type of information into a first value for indicating whether to continue discharging. Three analog signals, and send the third analog signal to the second signal terminal, the third analog signal is suitable for the identification of the electric tool, the second signal terminal includes an analog signal terminal, the second The type information includes said third analog signal.

In one of the embodiments, when the second controller judges that at least one of the first digital signal and the second analog signal indicates that the battery pack is not suitable for continuous discharge, a A third analog signal for continuing the discharge, otherwise a third analog signal for indicating that the discharge is allowed to continue is generated.

In one of the embodiments, when the electric tool is connected to the battery pack through the adapter, the adapter transmits the activation signal sent by the second signal terminal of the electric tool through the first signal terminal of the battery pack. Sent to the battery pack to activate said battery pack.

In one of the embodiments, the first signal terminal includes an analog signal terminal, and the first type information includes a second analog signal;

In one of the embodiments, the second controller receives and analyzes and judges the third type of information sent by the electric tool representing the working state of the electric tool, and controls whether to disconnect the battery pack, the adapter and The working loop between the electric tools; wherein, the third type of information can be determined according to the actual terminals of the adapter and the electric tool, and can include only digital signals, only analog signals, or both digital and analog signals.

In one of the embodiments, the adapter further includes a second current sampling unit, the second current sampling unit is used to collect the current information of the working loop, and the second controller is based on the current information and the The judgment result controls the on-off of the working circuit.

In the above electric tool system, a single battery pack can be matched and connected to different electric tools through different adapters at different times, and each adapter can send information about the state of the battery pack (including the state of a single battery cell and/or the state of the entire pack) ) of the first type of information is converted into the second type of information suitable for the identification of each electric tool and sent to the electric tool, so that the electric tool can know the real-time status information of the battery pack, and then can control itself and the battery pack according to the second type of information Working status, so that the refined over-discharge protection of the battery pack can be realized based on the real-time status information of the battery pack, effectively prolonging the life of the battery pack.

In the above-mentioned power tool system, a single battery pack can be matched and connected with a variety of power tools through a variety of adapters, which improves the utilization rate of the battery pack. At the same time, the adapter can send information about the battery pack status (including the status and/or the status of the whole pack) to determine whether to allow the battery pack to continue discharging, and control the on-off of the working circuit formed by the battery pack, the adapter, and the electric tool according to the judgment result, that is, the adapter can be in time according to the real-time status of the battery pack. The state controls the external discharge process of the battery pack, realizes refined over-discharge protection for the battery pack based on the real-time status information of the battery pack, and effectively prolongs the life of the battery pack.

Description of drawings

FIG. 1 is a schematic structural diagram of an electric tool system provided in Embodiment 1 of the present application;

2-4 are schematic structural diagrams of the electric tool system provided in Embodiment 1 of the present application;

FIG. 5 is a schematic structural diagram of an electric tool system provided in Embodiment 2 of the present application;

FIG. 6 is a schematic structural diagram of an electric tool system provided in Embodiment 3 of the present application;

7-9 are schematic structural diagrams of the electric tool system provided in Embodiment 4 of the present application;

Fig. 10 is a schematic diagram of the operation flow of the power tool system shown in Fig. 2;

Fig. 11 is a schematic diagram of the operation flow of the power tool system shown in Fig. 3;

Fig. 12 is a schematic diagram of the operation flow of the power tool system shown in Fig. 4;

Fig. 13 is a schematic diagram of the operation flow of the electric tool system shown in Fig. 6 .

Explanation of reference signs:

100. Battery pack; 110. Battery pack; 120. Battery monitoring system; 130. First controller; 140. First digital communication circuit; 150. First analog circuit;

200, adapter; 210, second digital communication circuit; 220, second controller; 230, second analog circuit; 240, third analog circuit; 250, third digital communication circuit; 260, switch circuit; 270, load activation Circuit; 201, the first adapter; 202, the second adapter; 203, the third adapter;

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

detailed description

In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise specified limit. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless specifically defined otherwise.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. 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, there has been an adapter provided between the battery pack and the power tool to realize the matching of one type of battery pack with multiple types of power tools, which improves the utilization rate of the battery pack. However, the adapters of the prior art Including the battery end connected to the battery pack and the tool end connected to the tool. The battery terminal receives the energy of the battery pack, and transmits the energy of the battery pack to the tool through the tool terminal. The tool receives power from the battery pack to start working. However, the battery end of the adapter does not receive the status information transmitted by the battery pack, so the tool end does not transmit the status information of the battery pack to the tool. The tool cannot know the real-time status information of the battery pack, so the tool can only perform extensive over-discharge protection on the battery pack based on the voltage status of the entire battery pack, but cannot fine-tune the battery pack based on the real-time status of the cells in the battery pack over-discharge protection. Long-term use will lead to a significant decrease in the life of the battery pack.

In order to solve this problem, the present application provides an adapter and an electric tool system.

Embodiment one

This embodiment provides an electric tool system. 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 to receive the first type of information sent by the battery pack 100, the first type of information includes the real-time status information of the battery pack 100; convert the first type of information into the second type of information suitable for the identification of the electric tool 300; send the second The type information is sent to the electric tool 300, and the electric tool 300 controls its operation based on the second type information.

Wherein, the battery pack 100 includes a positive terminal, a negative terminal, and a first signal terminal, the electric tool 300 includes a positive terminal, a negative terminal, and a second signal terminal, and the adapter 200 includes a first end connected to the battery pack and a second end connected to the electric tool. Two ends;

The battery pack 100 monitors the status of its single cell and/or the status of the whole pack to obtain the first type information, and sends the first type information to the adapter 200 through the first signal terminal. The status of a single battery cell and/or the status of a whole pack includes but is not limited to at least one of the following information, the real-time temperature of the battery pack, the real-time voltage of the whole battery pack, the real-time temperature of the battery pack, the real-time voltage of a single battery pack, etc. . The battery pack 100 can obtain the first type of information based on the state of a single battery cell and/or the state of the entire pack, and can also be based on the state of a single cell and/or the state of the entire pack and other inherent attributes of the battery pack that are pre-stored in the battery pack The information of the first type of information is obtained. The information pre-stored in the battery pack 100 that reflects the intrinsic properties of the battery pack 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 battery pack, the cell type of the battery pack, the The number of cells connected in parallel, the maximum allowable discharge current of the battery pack, etc.

The adapter 200 converts the first type of information into a second type of information suitable for identification by the electric tool 300, and sends the second type of information to the second signal terminal;

The electric tool 300 controls its own operation based on the second type of information input from the second signal terminal.

In the above-mentioned electric tool system, the battery pack 100 can be matched and connected with each electric tool 300 of the same type through an adapter 200, and the adapter 200 can send information about the state of the battery pack 100 (including the state of a single battery cell and/or The first type of information is converted into the second type of information suitable for each electric tool 300 to identify and sent to the electric tool 300, so that the electric tool 300 knows the real-time state information of the battery pack, and then can according to the second type of information By controlling the working status of itself and the battery pack, it can realize refined over-discharge protection for the battery pack based on the real-time status information of the battery pack, effectively prolonging the life of the battery pack.

Wherein, the electric tool 300 may include a lawn mower, a snow blower, a vacuum cleaner, etc., and may also include an electric hammer, an electric drill, and the like. The same adapter 200 can match the same type of electric tool 300 , and the same battery pack 100 can be connected to the same type of electric tool 300 through the same adapter 200 to provide power for the electric tool 300 . For example, the same battery pack 100 can be matched and connected with a lawn mower of a certain brand through the same adapter 200, and the same battery pack 100 can be matched and connected with a lawn mower of a different brand by designing different adapters 200. The user only needs to buy one battery pack 100 and different adapters 200 to use it with lawn mowers of different brands, which improves the compatibility between the battery pack 100 and the electric tool 300 and improves 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 will send the first type of information to the adapter 200, and the first type of information is information suitable for identification and processing by the battery pack 100. Including the real-time status information of the battery pack, discharge capacity, information on whether it is suitable for continuous discharge, etc. The real-time status information at least includes at least one of the real-time temperature of the battery pack, the real-time voltage of a single cell, the real-time voltage of the entire battery pack, and the like. The discharge capacity includes at least one of the rated capacity of the battery pack, the rated voltage of the entire battery pack, the type of cells in the battery pack, the number of cells connected in parallel in the battery pack, and the maximum allowable discharge current of the battery pack. Since the electric tool 300 cannot directly recognize the first type of information of the battery pack 100, the adapter 200 converts the first type of information into the second type of information suitable for the electric tool 300 to recognize, and then converts the converted second type of information The information is sent to the electric tool 300, so that the electric tool 300 can recognize the information sent by the battery pack 100, and adjust its working state accordingly.

In one embodiment, the first signal terminal includes a communication signal terminal, the first type of 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 the discharge capability. The real-time status information of the battery pack 100 includes the temperature of the battery pack 100, the voltage of each battery and the total voltage, etc., and the discharge 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, and the battery monitoring system 120 is connected to the battery pack 110 and the first controller 130 respectively. , the first controller 130 is also connected to the first digital communication circuit 140, and the first digital communication circuit 140 is externally connected to the adapter 200 through the first signal terminal BD. The battery monitoring system 120 is used to monitor at least one of the temperature of the battery pack 110, the voltage of each battery in the battery pack 110 and the total voltage, and send the monitored information to the first controller 130, the first controller 130 preprocesses it and sends it to the first digital communication circuit 140 , and then sends it to the adapter 200 through the first digital communication circuit 140 and the first signal terminal BD. That is, what the battery pack 100 sends to the adapter 200 is a digital signal.

The adapter 200 may include a second controller 220 for analyzing the first digital signal and performing signal conversion thereon.

Specifically, referring to FIG. 2 , the adapter 200 may further include a second digital communication circuit 210 inside, and the second controller 220 is connected to the second digital communication circuit 210 . Wherein, the second digital communication circuit 210 communicates with the first digital communication circuit 140 in the battery pack 100 based on the first digital communication protocol, that is, the adapter 200 receives the first data sent by the battery pack 100 through the second digital communication circuit 210 . digital signal, and send the first digital signal to the second controller 220, the second controller 220 analyzes the first digital signal, and judges whether the battery pack 100 is suitable for continuing to discharge.

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

In one embodiment, the first signal terminal includes an analog signal terminal, and the first type information includes a second analog signal. Wherein, the second analog signal is used to represent whether the battery pack is suitable for continuing to discharge.

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, and the first analog circuit 150 is externally connected to the adapter 200 through the analog signal terminal BA. The battery pack 100 includes In addition to sending its own real-time status information and discharge capacity to the adapter 200, the first controller 130 inside the battery pack 100 will also detect the state of the battery pack 100 itself, and determine whether the current battery pack 100 is suitable for continuous discharge , and then generate a second analog signal representing the judgment result, and send the second analog signal to the adapter 200 through the first analog circuit 150 .

Correspondingly, the adapter 200 also includes a second analog circuit 230 connected to the second controller 220, the second analog circuit 230 is used to receive the second analog signal sent by the first analog circuit 150 in the battery pack 100, and convert the second analog The signal is sent to the second controller 220 . The arrangement of the second analog circuit 230 and the first analog circuit 150 facilitates the transfer of analog values 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 100 sends a digital signal and an analog signal to the adapter at the same time, the digital signal is used to send real-time status information and discharge capability, and the analog signal is used to send information on whether to continue discharging.

To sum up, in this embodiment, the first signal terminal may only include a communication signal terminal, may only include an analog signal terminal, or may include a communication signal terminal and an analog signal terminal at the same time, that is, the battery pack may send only A digital signal may also be only an analog signal, or may include both a digital signal and an analog signal.

In one of the embodiments, the second controller 220 is configured to analyze the first type of information, and convert the first type of information into a third analog signal for indicating whether to allow continuous discharge, the second signal terminal includes an analog signal terminal, The second type of information includes a third analog signal.

In this embodiment, the second controller 220 analyzes the first digital signal and/or the second analog signal, and then generates a third analog signal suitable for electric tool identification, and the third analog signal is used to indicate whether to allow continuous discharge, thus It can realize the signal conversion between the battery pack and the electric tool. In practical applications, the second controller can convert the first digital signal into a third analog signal, or convert the second analog signal into a third analog signal, and can also comprehensively analyze the first digital signal and the second analog signal. , generating a third analog signal.

When the first type of information includes both the first digital signal and the second analog signal, the second controller comprehensively analyzes the first digital signal and the second analog signal, finally judges whether the battery pack 100 is currently allowed to continue discharging, and generates a token A third analog signal suitable for identification by the electric tool 300 is determined as a result, and the third analog signal is sent to the electric tool 300 as converted second type information. The advantage of comprehensively analyzing the first digital signal and the second analog signal is that it is inevitable that there will be errors in judging whether the battery pack 100 is allowed to continue discharging based on the first digital signal or the second analog signal alone. When the real-time state information is wrong, if the adapter only judges according to the first digital signal, the power tool 300 cannot accurately control its own state; for example, when the battery pack 100 judges its own state incorrectly, the second analog signal it transmits will have errors , if the determination is made only based on the second analog signal, the electric tool 300 also cannot accurately control its own state. In summary, in this embodiment, the first digital signal and the second analog signal are combined for analysis, so that the adapter can judge whether the battery pack is abnormal according to any one of the two. This dual redundant design makes the battery pack In case of abnormality, the adapter can accurately identify and transmit the abnormality to the tool, so that the tool stops working and protects the battery pack in time.

Referring to Fig. 2, the adapter 200 also includes a third analog circuit 240 connected to the second controller 220, the third analog circuit 240 is used to convert the judgment result of the second controller 220 to the first digital signal and the second analog signal into A third analog signal suitable for identification 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 receives the third analog signal sent by the third analog circuit 240 in the adapter 200 through the analog signal terminal TV, and sends the The three analog signals are sent to the third controller 320, and the third controller 320 can determine the working state of the electric tool 300 according to the third analog signal.

In one of the embodiments, when the adapter 200 judges that at least one of the first digital signal and the second analog signal indicates that it is not suitable to continue the discharge, it generates a third analog signal that indicates that the discharge is not allowed; otherwise, it generates a third analog signal for A third analog signal that characterizes the continuation of the discharge is allowed.

That is, as long as one of the first digital signal and the second analog signal is not suitable for continuing to discharge, it is determined that the current battery pack 100 is not suitable for continuing to discharge, and the battery pack 100 is not allowed to continue discharging; only when the first digital signal and the second analog signal Only when the signals indicate that the battery pack 100 is suitable for continuous discharge can it be determined that the current battery pack 100 is suitable for continuous discharge, and the battery pack 100 is allowed to continue to discharge. In this way, it can be ensured that the battery pack 100 and the electric tool 300 can work in a safe state, and the reliability of both can be improved.

In one of the embodiments, the third analog signal used to indicate that continuation of discharge is not allowed includes a high temperature analog signal or low temperature analog signal suitable for electric tool 300 identification, and the third analog signal used to indicate that continuation of discharge is allowed includes an analog signal suitable for electric power tool 300 Normal temperature analog signal recognized by tool 300 .

In an actual product, the negative electrode of the battery pack 100 is connected to a MOS tube, and the MOS tube is connected to a temperature sensor, wherein the temperature sensor can be an NTC resistor, or simulate the NTC resistor through a fixed resistor, and the NTC resistor is a sensor for detecting temperature. The temperature sensor is connected to an 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 tube to close, and the external connection terminal of the third analog circuit 240 transmits the real-time resistance signal of the temperature sensor to the electric tool 300, and the third controller 320 in the electric tool 300 Based on the resistance signal, it is judged whether the temperature of the battery pack 100 is normal, so as to control the operation of the electric tool 300 . When undervoltage, the second controller 220 controls the MOS tube to be disconnected. At this time, the signal transmitted from the external connection terminal of the third analog circuit 240 to the electric tool 300 is infinite resistance, and the third controller 320 receives the infinite resistance signal. , it is judged to be a low temperature signal, so that the discharge of the battery pack 100 is stopped. Therefore, when the battery pack 100 has abnormal voltage conditions such as undervoltage, the third analog signal is a low-temperature analog signal, and when the temperature of the battery pack 100 is abnormal, the third analog signal is a high-temperature analog signal or a low-temperature analog signal, that is, Both temperature and voltage abnormalities can be transmitted to the electric tool 300 through the third analog signal.

In one of the embodiments, the third analog signal includes two types of signals, which are respectively transmitted to the electric tool 300 through two different analog signal terminals, and correspondingly, the electric tool 300 is also provided with two corresponding analog signal terminals, Used to receive the two different types of analog signals. Exemplarily, the first type of signal is a high-temperature analog signal or a low-temperature analog signal that is not allowed to continue discharging and is suitable for identification by the electric tool 300 , or a normal temperature analog signal that is allowed to continue discharging and is suitable for identification by the electric tool 300 . Signal; the second type of signal is a low voltage signal that is not allowed to continue discharging and is suitable for identification by the electric tool 300 , or a normal voltage signal that is allowed to continue discharging and is suitable for identification by the electric tool 300 . The normal voltage signal and the low voltage signal refer to specific voltage values. The normal voltage signal can be the allowable discharge voltage value of the whole pack calculated based on the lowest allowable discharge voltage value Vcell of a single cell, that is, the battery packs connected in series The product of the number of cells N and the lowest allowable discharge voltage value of a single cell, N*Vcell; it can also be the allowable discharge voltage value of some cells in the battery pack calculated based on the allowable discharge voltage value of a single cell , that is, the product of the number of cells N' in the battery pack and the lowest allowable discharge voltage value of a single cell, N'*Vcell, or the lowest allowable discharge voltage value Vcell of a single cell. A low voltage signal refers to a voltage signal that is lower than a normal voltage. The lowest allowable discharge voltage value of a single battery cell can be obtained by consulting its specifications based on the type of battery cell in the battery pack.

In one of the embodiments, 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 electric tool 300 , and send the fourth analog signal to the power tool 300 The second signal terminal, the second signal terminal includes an analog signal terminal, for example, the BS terminal in FIG. The discharge capability of the battery pack includes the capacity of the battery pack, the voltage of the battery pack, the type of batteries in the battery pack, the maximum discharge current allowed by the battery pack, and other inherent attributes about its own capabilities.

Specifically, when the adapter 200 receives the first digital signal, in addition to analyzing and judging it, the first digital signal may include the discharge capacity of the battery pack through the second internal controller 220 and the third analog circuit 240 . The information is converted into a fourth analog signal representing the discharge capacity of the battery pack suitable for identification by the electric tool 300, and the fourth analog signal is sent to the electric tool 300 as the second type of information, thereby realizing the transmission of the discharge capacity of the battery pack 100.

Referring to Fig. 3, at this time, the analog signal terminal TV of the electric tool receives the third analog signal used to represent whether to continue discharging, and the analog signal terminal BS of the electric tool receives the fourth analog signal representing the discharge capacity of the battery pack. analog signal. The difference between the scheme in Fig. 3 and the scheme in Fig. 2 is that in the scheme in Fig. 3, a fourth analog signal representing the discharge capacity of the battery pack is also transmitted, so that the power tool side can obtain the analog quantity corresponding to the discharge capacity of the battery pack.

Wherein, in practical applications, 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 of each other, and the third analog signal and the fourth analog signal are respectively transmitted to the electric tool through different terminals , which helps to improve the transmission efficiency of each analog signal.

As an alternative implementation, the adapter 200 may also convert the received first type information into a digital signal and transmit it to the electric tool 300 . Specifically, the second controller is used to convert the first type of information into a second digital signal, and send the second digital signal to a second signal terminal, the second signal terminal includes a communication signal terminal, and the second type of information includes a second digital signal Signal. That is, the second controller converts the first digital signal into a second digital signal, or converts the second analog signal into a second digital signal, or comprehensively analyzes the first digital signal and the second analog signal to generate a second digital signal.

Wherein, the first digital signal is based on the first digital communication protocol, and the second digital signal is often based on the second digital communication protocol different from the first digital communication protocol, therefore, the second controller 220 will be based on the first digital communication protocol The first digital signal is converted into a second digital signal based on the second digital communication protocol, which facilitates information identification of the electric tool 300 .

Specifically, referring to FIG. 4, the inside of the adapter 200 also includes a third digital communication circuit 250 connected to the second controller 220, and the inside of the power tool 300 also includes a fourth digital communication circuit 330 connected to the third controller 320. The fourth digital communication circuit The circuit 330 is connected to the adapter through the communication signal terminal BE, the third digital communication circuit 250 and the fourth digital communication circuit 330 communicate based on the second digital communication protocol, after the third controller 320 converts the first digital signal into a second digital signal, The second digital signal is sent to the fourth digital communication circuit 330 via the third digital communication circuit 250, thereby realizing the transmission of the digital signal. After the first digital signal is converted into the second digital signal, it is beneficial to identify the electric tool.

It can be seen from the above that the adapter can convert the first type of information into an analog signal for indicating whether to allow continuous discharge or a digital signal for indicating whether to allow continuous discharge, or a digital signal for indicating the real-time status of the battery pack, or for At least one of the digital signals representing the discharge capacity of the battery pack is sent to the electric tool.

In one of the embodiments, the communication signal terminal BE can also be used as a multiplexing terminal, that is, in practical applications, the communication signal terminal BE can transmit both analog signals and digital signals. For example, the output of the analog quantity of the discharge capacity of the battery pack can be realized, and the output of the digital signal representing the real-time state of the battery pack, or the discharge capacity, or whether the discharge is allowed can also be realized. The advantage of this design is that the combination of this type of battery pack and adapter can match many types of power tools. This benefit is especially reflected in the same company's electric tools with the same interface but upgraded performance, which can realize that the combination of the battery pack and the adapter in this embodiment can be applicable to both the electric tools before the company's upgrade and the company's Upgraded power tools. An optional upgrade situation is that the number and type of interfaces of the pre-upgrade electric tool and the post-upgrade electric tool remain unchanged, but the pre-upgrade electric tool does not have a digital communication function, and the post-upgrade electric tool has a digital communication function. Specifically, since the electric tool before the upgrade has no communication function, it can receive analog signals through the communication signal terminal BE, but cannot receive digital signals through the communication signal terminal BE. The upgraded electric tool has a digital communication function, which directly communicates with the communication signal terminal BE, so as to obtain relevant information according to the digital signal transmitted during the communication process. In one of the embodiments, the second controller can simultaneously convert the first type of information into a third analog signal and a second digital signal, and send the third analog signal and the second digital signal to the second signal terminal, at this time The second signal terminal includes an analog signal terminal and a communication signal terminal, and the second type information includes both a third analog signal and a 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 misjudgment of the electric tool due to failure or error in transmission of any one of the analog signal and digital signal. Wherein, the third analog signal can be an analog signal used to indicate whether to allow continuous discharge, and the second digital signal can be at least one of digital signals used to indicate the real-time status information of the battery pack, discharge capacity, and whether to allow continuous discharge.

In conjunction with Figure 4, the analog signal terminal TV of the electric tool receives the third analog signal used to indicate whether to continue discharging, and the digital signal terminal BE of the electric tool receives the real-time status information representing the battery pack, discharge capacity, Whether to allow the second digital signal of continuous discharge, etc., the real-time status information includes the temperature of the battery pack 100, the voltage of each battery and the total voltage, etc., and the discharge capacity of the battery pack includes 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 difference between the scheme in Figure 4 and the scheme in Figure 2 is that in the scheme in Figure 4, a second digital signal representing at least one of the real-time status information of the battery pack, the discharge capacity, and whether to allow continuous discharge is also transmitted, so that the electric tool side can know the battery The digital quantity corresponding to the specific state information of the package.

In one embodiment, the electric tool 300 is also used to collect current information of the working loop formed by the battery pack 100 , the adapter 200 and the electric tool 300 , and control its own work based on the current information and the second type information. That is, the electric tool 300 not only controls its own operation according to the second type information converted from the first type information sent by the battery pack 100 , but also can make a comprehensive judgment in combination with the collected current information on the working circuit.

The electric tool may include a first current sampling unit and a third controller, the first current sampling unit is used to collect the current information on the working circuit formed by the battery pack, the adapter and the electric tool, and the third controller is based on the current information and the second type The information controls the operation of the power tool.

Specifically, referring to FIGS. 2-4 , a sampling resistor R1 can be connected in series between the two charging terminals of the electric tool 300, the first current sampling unit is the sampling resistor R1, and the third controller 320 collects the current collected by the sampling resistor. information, and then determine the magnitude of the current in the discharge circuit. If the current is in an abnormal state, it means that the battery pack 100 is no longer suitable for continuous discharge. In practical applications, it can be set as: if any one of the current information and the second type of information represents If the discharge cannot be continued, stop the discharge.

In this embodiment, referring to FIGS. 2-4 , the power tool 300 also includes a power supply circuit 340 and a motor control unit 350. 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 to the working In the loop, a third controller 320 is connected at the same time, and the third controller 320 controls the electric tool 300 by controlling the working state of the motor control unit 350 .

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

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, and the power circuit 340 in the electric tool 300 works, providing the third controller 320 And the fourth analog circuit 310 supplies power, and the fourth analog circuit 310 is controlled to generate an activation signal, and sends it to the second controller 220 through the third analog circuit 240 in the adapter 200 to activate the second controller 220 to work, and the second controller 220 then sends the activation signal to the first analog circuit 150 in the battery pack 100 via the second analog circuit 230 , and then to the first controller 130 to activate the first controller 130 to work. After the first controller 130 is activated, it acquires the status information of the battery pack 100 detected by the battery monitoring system 120 , and then performs the information transmission described above, and controls the start and stop of the motor control unit 350 .

Wherein, in practical applications, the analog signal terminal TV may be a single terminal or multiple terminals. For example, in one of the embodiments, when the transmission of the activation signal and the transmission of the third analog signal need to be completed between the electric tool and the adapter, the analog signal terminal TV can be multiple terminals, and the activation signal is transmitted through different terminals and a third analog signal. In another embodiment, when the transmission of the activation signal and the transmission of the third analog signal need to be completed between the electric tool and the adapter, the analog signal terminal TV may be multiple terminals, wherein the third analog signal includes two types Signals, such as the signal of whether to allow continuous discharge and the signal of the voltage of some cells in the battery pack. In this embodiment, one analog signal terminal is used to transmit an activation signal, the other analog signal terminal is used to transmit a signal whether to allow continuous discharge, and the other analog signal terminal is used to transmit a signal of the voltage of some cells in the battery pack. Or one analog signal terminal is used to transmit the activation signal and the signal of whether to allow continuous discharge, and the other analog signal terminal is used to transmit the signal of the voltage of some cells in the battery pack. Or one analog signal terminal is used to transmit the activation signal and the voltage signal of some cells in the battery pack, and the other analog signal terminal is used to transmit the signal whether to allow continuous discharge.

Three different embodiments are described below in conjunction with the figures:

The first embodiment:

Combining Figures 2 and 10, first connect the electric tool to the battery pack through the corresponding adapter, then press the start button of the electric tool, and the power circuit in the electric tool will work to supply power for the third controller and the fourth analog circuit; the fourth The analog circuit sends an activation signal to the second controller in the adapter through the TV terminal to activate the second controller; the second controller then sends the activation signal to the battery pack through the second analog circuit and the BA terminal to activate the battery pack. first controller.

After the first controller is activated, it collects the real-time status information of the battery pack monitored by the battery monitoring system, including the status of a single pack and the status of the entire pack, and passes the status information of the battery pack through the first digital communication circuit as a first digital signal and the communication signal terminal BD to the second digital communication circuit of the adapter, and the second digital communication circuit sends the received first digital signal to the second controller in the adapter. At the same time, the first controller in the battery pack can judge the acquired state information of the battery pack, generate a second analog signal representing whether it is suitable for continuous discharge, and transmit the second analog signal through the first analog circuit and the analog signal terminal BA. sending to the second analog circuit of the adapter, and the second analog circuit sends the received second analog signal to the second controller in the adapter;

After the second controller acquires the first digital signal and the second analog signal, it can comprehensively analyze the first digital signal and the second analog signal, determine whether the battery pack is currently allowed to continue discharging, and generate a third analog signal representing the judgment result, And send the third analog signal to the fourth analog circuit of the electric tool through the third analog circuit and the analog signal terminal TV;

The electric tool also includes a sampling resistor R1, and the third controller obtains the sampling data of the sampling resistor R1 to obtain the current information on the loop, and comprehensively judges whether to allow the motor control unit to work by combining the third analog signal and the current information.

The second embodiment:

3 and 11, the difference between this embodiment and the first embodiment is that the second controller also converts the first digital signal into a fourth analog signal, and converts the discharge capacity to the fourth analog signal through the third analog circuit and the analog signal terminal BS. The analog quantity (that is, the fourth analog signal) is sent to the fourth analog circuit of the electric tool, and then transmitted to the third controller, so that the electric tool can receive the third analog signal whether to allow continuous discharge, and also An analog quantity of the discharge capacity of the battery pack can be received.

The third embodiment:

4 and 12, the difference between this embodiment and the first embodiment is that the second controller also converts the first digital signal into a second digital signal, and converts the battery At least one of the digital signals including real-time status information, discharge capacity, and whether to allow continuous discharge (that is, the second digital signal) is sent to the fourth digital communication circuit of the electric tool, and then transmitted to the third controller. In addition to receiving the third analog signal of whether to allow continuous discharge, the tool can also receive at least one of the real-time status information of the battery pack, discharge capacity, and digital signals of whether to allow continuous discharge.

Embodiment two

This embodiment provides an electric tool system, including a single battery pack, several adapters, and several electric tools. A single battery pack can be connected to different electric tools through different adapters at different times, and each adapter is connected to each electric tool. One to one correspondence.

The battery pack includes a positive terminal, a negative terminal and a first signal terminal, each electric tool includes a positive terminal, a negative terminal and a second signal terminal, and each adapter includes a first end connected to the battery pack and a first end connected to the corresponding electric tool. Two ends.

The battery pack monitors the state of its own single cell and/or the state of the whole pack, obtains the first type of information, and sends the first type of information to the adapter through the first signal terminal; the adapter converts the first type of information into a power tool suitable for identification The second type of information is sent to the second signal terminal, and the electric tool controls its own operation based on the second type of information input from 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 can be connected to the first tool 301 through the first adapter 201 in the first state, and can also be connected through the second adapter 202 in the second state. The second tool 302 can also be connected to the third tool 303 through the third adapter 203 in the third state. Of course, more types of adapters can be designed to adapt to more types of tools. Here, only three types of adapters and electric tools corresponding to one of them are used as examples for illustration.

The battery pack includes a positive terminal, a negative terminal and a first signal terminal, the first tool includes a positive terminal, a negative terminal and a first signal terminal, the second tool includes a positive terminal, a negative terminal and a second signal terminal, and the third tool includes The positive terminal, the negative terminal and the third sub-signal terminal, the first adapter includes the first end connected with the battery pack and the second end connected with the first tool, the second adapter includes the first end connected with the battery pack and the second end connected with the second tool The second end connected with the second tool, the third adapter includes a first end connected with the battery pack and a second end connected with the third tool.

The battery pack monitors the state of its own single cell and/or the state of the whole pack, obtains the first type of information, and sends the first type of information to the first adapter, the second adapter and the third adapter respectively through the first signal terminal; the first The adapter 201 converts the first type information into first subtype information suitable for the first tool 301 to identify, and sends the first subtype information to the first sub-signal terminal, and the first tool 301 is based on the first sub-type information input by the first sub-signal terminal. A sub-type information controls its own work; the second adapter converts the first type information into a second sub-type information suitable for the second tool recognition, and sends the second sub-type information to the second sub-signal terminal, and the second tool is based on the second sub-type information The second sub-type information input by the second sub-signal terminal controls its own work;

The third adapter converts the first type information into the third sub-type information suitable for the recognition of the third tool, and sends the third sub-type information to the third sub-signal terminal, and the third tool is based on the third sub-type information input by the third sub-signal terminal. The subtype information controls how it works.

Wherein, the first tool 301, the second tool 302 and the third tool 303 are electric tools 300 of different types or brands respectively, and this embodiment includes Matching first adapter 201 , second adapter 202 and third adapter 203 , the first adapter 201 , second adapter 202 and third adapter 203 can be mated and connected with the same battery pack 100 . Due to the difference between the first tool 301, the second tool 302 and the third tool 303, the applicable information types are different, the first tool 301 corresponds to the first sub-type information, the second tool 302 corresponds to the second sub-type information, The third tool 303 corresponds to the third subtype information, so each adapter 200 converts the first type information sent by the battery pack 100 into the first subtype information suitable for the identification of the first tool 301 and suitable for the identification of the second tool 302. The second subtype information of the third tool 303 is suitable for identifying the third subtype information, and each tool can control its own work according to the converted information.

Thus, the battery pack 100 can be matched and connected with each electric tool 300 of the same type through an adapter 200, and the adapter 200 can convert the first type of information sent by the battery pack 100 into information suitable for each electric tool 300 to identify and Send it to the electric tool 300, so that the electric tool 300 can know the real-time state information of the battery pack, and then control the working state of itself and the battery pack accordingly, so that the process of refining the battery pack based on the real-time state information of the battery pack can be realized Put protection, effectively prolong the life of the battery pack.

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

In one of the embodiments, the adapter includes a second controller, the second controller is used to analyze the first type of information, and convert the first type of information into a third analog signal used to indicate whether to allow continuous discharge, the second signal terminal An analog signal terminal is included, and the second type information includes the third analog signal.

In one of the embodiments, 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 a second signal terminal, the second signal terminal includes a communication The signal terminal, the second type of information includes a second digital signal.

In one of the embodiments, the second controller of the adapter is also used to convert the first digital signal into a fourth analog signal suitable for electric tool recognition, and send the fourth analog signal to the second signal terminal, the second type The information includes a fourth analog signal.

In one of the embodiments, the adapter includes a second controller for converting the first type of information into a third analog signal and a second digital signal, and sending the third analog signal and the second digital signal to the first Two signal terminals, the second signal terminal includes an analog signal terminal and a communication signal terminal, and the second type information includes a third analog signal and a second digital signal.

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

The battery pack sends the first digital signal to the adapter, and the adapter converts it into a third analog signal and sends it to the electric tool; the battery pack sends the second analog signal to the adapter, and the adapter converts it into a third analog signal and sends it to the electric tool; the battery pack Simultaneously send the first digital signal and the second analog signal to the adapter, and the adapter converts it into a third analog signal and sends it to the electric tool;

The battery pack sends the first digital signal to the adapter, and the adapter converts it into a second digital signal and sends it to the electric tool; the battery pack sends the second analog signal to the adapter, and the adapter converts it into a second digital signal and sends it to the electric tool; the battery pack Simultaneously send the first digital signal and the second analog signal to the adapter, and the adapter converts it into a second digital signal and sends it to the electric tool;

The battery pack sends the first digital signal to the adapter, and the adapter converts it into the second digital signal and the third analog signal and sends it to the electric tool; the battery pack sends the second analog signal to the adapter, and the adapter converts it into the second digital signal and the third The three analog signals are sent to the electric tool; the battery pack sends the first digital signal and the second analog signal to the adapter at the same time, and the adapter converts it into the second digital signal and the third analog signal and sends it to the electric tool;

The battery pack sends the first digital signal to the adapter, and the adapter converts it into the third analog signal and the fourth analog signal and sends it to the electric tool; the battery pack sends the first digital signal and the second analog signal to the adapter, and the adapter converts it into the third analog signal The third analog signal and the fourth analog signal are sent to the electric tool.

The power tool system provided in this embodiment and the power tool system provided in Embodiment 1 belong to the same inventive concept. For the specific content and internal structure of the above-mentioned power tool system provided in this embodiment, please refer to the specific description in Embodiment 1. This will not be repeated here.

Embodiment three

This embodiment provides an electric tool system, the electric tool system includes a battery pack 100, an adapter 200 and an electric tool 300, the battery pack 100 includes a positive terminal, a negative terminal and a first signal terminal, and the electric tool 300 includes a positive terminal and a negative terminal , the adapter 200 includes a first end connected to the battery pack 100 and a second end connected to the electric tool 300;

The battery pack 100 monitors the state of its own single cell and/or the state of the whole pack, obtains the first type information, and sends the first type information to the adapter 200 through the first signal terminal;

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

In the above electric tool system, the same adapter 200 can match the same type of electric tool 300 , and the same battery pack 100 can be connected to the same type of electric tool 300 through the same adapter 200 to provide power for the electric tool 300 . Of course, a single battery pack 100 can also be matched and connected with various electric tools 300 through various adapters 200. Users only need to purchase one battery pack 100 and the corresponding adapter 200 to match various electric tools 300, which improves the battery pack 100. The compatibility with the electric tool 300 also improves the utilization rate of the battery pack 100 .

At the same time, 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 the working circuit formed by the battery pack 100, the adapter 200 and the electric tool 300 according to the judgment result, that is, the adapter The 200 can control the external discharge process of the battery pack 100 according to the state of the battery pack 100 in time, so as to ensure the safety and lifespan of the electric tool 300 and the battery pack 100 .

The main difference between this embodiment and Embodiment 1 is that in this embodiment, after analyzing and judging the first type of information, the adapter 200 directly controls the on-off of the working circuit, and then controls the working state of the electric tool 300 without any communication with the future The first type of information is converted into the second type of information.

Wherein, the battery pack 100's own state of a single battery cell and/or the state of the whole pack may include at least one of the temperature of the battery pack 100, the voltage of each battery, the total voltage, and the discharge capacity (capacity, voltage, battery type, etc.) A sort of.

In one of the embodiments, the first signal terminal includes a communication signal terminal, the first type information includes a first digital signal, the adapter 200 includes a second controller, and the second controller is used to analyze the first digital signal and generate a signal used to represent whether It is suitable to continue the discharge according to the first judgment result, and control the on-off of the working circuit formed by the battery pack 100 , the adapter 200 and the electric tool 300 based on the first judgment result.

Specifically, regarding the internal structure of the battery pack 100 , reference may be made to the specific description in Embodiment 1, which will not be repeated here. After the second digital communication circuit 210 in the adapter 200 acquires the first digital signal, it sends the first digital signal to the second controller 220, and the second controller 220 analyzes the first digital signal to determine the current battery pack 100 whether it is suitable to continue discharging, and generate a first judgment result, if the first judgment result is suitable to continue discharging, then turn on the working loop, if the first judging result is not suitable to continue discharging, then turn off the working loop.

In one of the embodiments, the first type information includes a second analog signal, the second analog signal is used to indicate whether the battery pack is suitable for continuous discharge, and the second controller is used to analyze the second analog signal and generate a signal used to indicate whether the battery pack is suitable for continuous discharge Based on the second judgment result, the on-off of the working circuit formed by the battery pack 100 , the adapter 200 and the electric tool 300 is controlled.

Specifically, the first controller 130 inside the battery pack 100 will also detect the state of the battery pack 100 itself, and determine whether the current battery pack 100 is suitable for continuing to discharge, and then generate a second analog signal representing the judgment result, and The second analog signal is sent to the adapter 200 via the first analog circuit 150 . After the adapter 200 receives the second analog signal, it generates a second judgment result to ensure whether it is suitable for continuous discharge. If the second judgment result is suitable for continuous discharge, the working circuit is turned on. If the second judgment result is not suitable for continuous discharge, Then disconnect the working circuit.

As an alternative embodiment, the second controller 220 can comprehensively consider the first judgment result and the second judgment result, if at least one of the two is not suitable for continuing to discharge, then disconnect the working circuit, and only when both are suitable for continuing to discharge Discharge, the working circuit is turned on. In this way, the situation that the adapter 200 cannot accurately control the working state of the electric tool 300 due to errors in information transmission can be effectively avoided.

In one of the embodiments, the second controller 220 can also receive the third type of information representing the working state of the electric tool 300 sent by the electric tool 300 via the fourth analog circuit 310, and control whether to disconnect the battery according to the third type of information. The working circuit between the bag 100, the adapter 200 and the electric tool 300, wherein the third type of information can be determined according to the actual terminals of the adapter 200 and the electric tool 300, and can only include digital signals, can only include analog signals, or can be simultaneously Includes digital and analog signals.

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 the switching of the switch circuit 260 according to the judgment result. Specifically, the second controller 220 is connected to the switch circuit, and the switch circuit 260 can be a MOS switch circuit 260. When the judgment result is that it is not suitable to continue discharging, the MOS switch circuit 260 is disconnected to ensure that the working circuit is disconnected, otherwise the MOS switch is turned on. The circuit 260 ensures the continuity of the working circuit.

In one embodiment, the adapter 200 is also used to collect current information of the working loop, and control the on-off of the working loop based on the current information and the judgment 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 loop is provided in the adapter 200, and the sampling resistor R2 is connected to the second controller 220, and the sampling resistor R2 is used to collect the current sampling unit through the second controller 220. If the current is in an abnormal state, it means that the battery pack 100 is no longer suitable for continuous discharge. In practical applications, it can be set as follows: if any one of the current information and the judgment result represents If the discharge cannot be continued, stop the discharge.

In this embodiment, the adapter 200 is also provided with a load activation circuit 270. When the battery pack 100, the adapter 200 and the electric tool 300 are connected, the load activation circuit 270 generates an activation signal by itself and sends it to the second controller 220 for Activate the second controller 220, and the second controller 220 sends an 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 the first controller 130 receives After activation, the basic information of the battery pack 100 detected by the battery monitoring system 120 is obtained, and then the above-described signal transmission, analysis and judgment, and control processes are executed.

For the specific details of the power tool system provided in this embodiment, refer to the specific description in Embodiment 1, and details will not be repeated here.

A specific embodiment is described below in conjunction with FIG. 6 respectively:

6 and 13, first connect the electric tool to the battery pack through the corresponding adapter, the load activation circuit 270 in the adapter 200 is activated, an activation signal is sent to the second controller, the second analog circuit in the adapter works, and the load activation circuit 270 is activated through the BA terminal Send an activation signal to the first controller in the battery pack. Specifically, when the battery pack is in an idle state, the first controller in the battery pack is in a dormant state to reduce the power consumption of the battery pack when it is not working, and to avoid damage to the battery pack due to over-discharge. When the battery pack is used, the battery pack needs to work. At this time, the first controller of the battery pack will be activated to wake up the battery pack to enter the working state.

After the first controller is activated, it collects the real-time status information of the battery pack monitored by the battery monitoring system, including the status of a single pack and the status of the entire pack, and passes the status information of the battery pack through the first digital communication circuit as a first digital signal and the communication signal terminal BD to the second digital communication circuit of the adapter, and the second digital communication circuit sends the received first digital signal to the second controller in the adapter. At the same time, the first controller in the battery pack can judge the acquired state information of the battery pack, generate a second analog signal representing whether it is suitable for continuous discharge, and transmit the second analog signal through the first analog circuit and the analog signal terminal BA. The signal is sent to the second analog circuit of the adapter, and the second analog circuit sends the received second analog signal to the second controller in the adapter.

After the second controller acquires the first digital signal and the second analog signal, it can comprehensively analyze the first digital signal and the second analog signal to determine whether the battery pack is currently allowed to continue discharging. If discharging is allowed, the second controller controls The switch circuit is closed, the electric tool obtains the electric energy of the battery pack, and the start button of the electric tool is pressed, and if discharge is not allowed, the control switch circuit is disconnected.

In addition, the adapter also includes a sampling resistor R2, and the electric tool also includes a sampling resistor R1. The second controller can obtain the sampling data of the sampling resistor R2 to obtain the current information on the circuit. If it is judged that the current information is abnormal, the control switch circuit is turned off open to stop the discharge of the battery pack; the third controller can also obtain the sampling data of the sampling resistor R1 to obtain the current information on the loop, and if it is judged that the current information is abnormal, it can also control the motor control unit to stop working. If the current information is normal, then keep the motor control unit in the electric tool working normally.

Embodiment Four

This embodiment provides an electric tool system. 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 battery pack 100 monitors the status of its single cell and/or the status of the whole pack to obtain the first type information, and sends the first type information to the adapter 200 through the first signal terminal. The state of a single battery cell and/or the state of the whole pack includes but is not limited to at least one of the following information, real-time status information of the battery pack, such as the real-time temperature of the battery pack, the real-time voltage of the whole pack of the battery pack, the real-time temperature of the battery cell, the The real-time voltage of the battery-saving core, etc., the discharge capacity of the battery pack, such as the rated capacity of the battery pack, the rated voltage of the entire battery pack, the type of battery cells in the battery pack, the number of parallel-connected cells in the battery pack, and the maximum allowable discharge of the battery pack Current, etc., and information on whether the battery pack is suitable for continuous discharge, etc. The battery pack can obtain the first type of information based on the state of a single battery cell and/or the state of the whole pack, and can also be based on the state of a single cell and/or the state of the whole pack and other pre-stored in the battery pack to reflect the intrinsic properties of the battery pack The information obtains the first type of information. The information pre-stored in the battery pack that reflects the inherent properties of the battery pack 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 battery pack, the cell type of the battery pack, and the parallel connection in the battery pack. The number of batteries, the maximum allowable discharge current of the battery pack, etc.

The adapter 200 is used to receive the first type of information about the state of the battery pack (including the state of a single battery cell and/or the state of the whole pack) sent by the battery pack 100, and convert the first type of information into the first type of information suitable for the identification of the electric tool 300. The second type of information is sent to the electric tool 300, and the electric tool 300 controls its own work based on the second type of information; the adapter 200 is also used to judge whether to allow the battery pack 100 to continue discharging according to the first type of information, and control the battery pack 100, On-off of the working circuit formed by the adapter 200 and the electric tool 300 .

The main difference between this embodiment and the previous embodiments is that in this embodiment, the adapter 200 not only converts the first type of information into the second type of information and sends it to the electric tool 300, but also provides power to the electric tool 300 to control its own work, and also converts the first type of information Type information is analyzed and judged to control the on-off of the working circuit. Therefore, both the adapter 200 and the electric tool 300 can control the abnormal working state of the working circuit. It is inevitable that errors or failures will occur in the judgment of the electric tool 300 . If an abnormality occurs at this time, it cannot be found in time. This dual redundant design enables the abnormal working state of the entire working system to be accurately identified and the entire working system can be protected in time.

In one embodiment, the priority of the adapter 200 to control the on/off of the working circuit according to the judgment result is lower than the priority of the adapter 200 to send the second type information to the second signal terminal.

Specifically, the adapter 200 converts the first type of information into the second type of information, synchronously, the adapter 200 analyzes the first type of information to determine whether to allow the battery pack 100 to continue discharging; the adapter 200 sends the second type of information to the electric tool 300 After that, the on-off of the working circuit formed by the battery pack 100 , the adapter 200 and the electric tool 300 is controlled according to the judgment result.

It can be understood that when the adapter 200 analyzes the first type of information and determines that the battery pack 100 is not allowed to continue discharging, and controls to disconnect the working circuit, if the adapter 200 has not sent the second type of information to the second signal terminal at this time, then The electric tool 300 cannot obtain the second type of information from the second signal terminal, so it cannot control its own operation in time and accurately, which may easily cause damage to the electric tool 300 . Conversely, if the adapter 200 judges that the battery pack 100 is not allowed to continue discharging, the adapter 200 first sends the second type of information to the second signal terminal, and then the adapter 200 disconnects the working circuits of the three, and the electric tool 300 can start from the second signal terminal. The signal terminal receives the second type of information and can actively control the shutdown or perform other operations. On the basis of ensuring the safety of the battery pack, it also effectively avoids the damage caused by the sudden interruption of the power supply of the electric tool 300, and also from the tool end, Two execution controls at the adapter end realize double security protection.

In one of the embodiments, the electric tool 300 sends the third type of information to the adapter through the second signal terminal; Disconnect the working circuit formed by the battery pack 100 , the adapter 200 and the electric tool 300 . Specifically, when the electric tool 300 determines that its operation is abnormal, such as overload, overcurrent, temperature abnormality, component failure, etc., it sends the adapter 200 including the third type of information representing the working state of the electric tool 300 . The adapter 200 controls the on-off of the working circuit according to the third type of information received from the electric tool 300 . The advantage of this design is that no matter whether the working circuit can be disconnected in time inside the electric tool 300, the adapter 200 can judge and interrupt the working circuit in time to ensure the safety of the entire working system.

Regarding the internal structure of the battery pack 100 , reference may be made to the specific description in Embodiment 1, which will not be repeated here.

In one of the embodiments, referring to FIG. 7 , the adapter 200 may include a second controller 220 , a second digital communication circuit 210 and a third analog circuit 240 . The second digital communication circuit 210 receives the first digital signal sent by the first digital communication circuit 140 in the battery pack 100, and sends the first digital signal to the second controller 220, and the third analog circuit 240 is used to transfer the second control The judgment result of the first digital signal by the device 220 is converted into a third analog signal that the electric tool can recognize, and is sent to the electric tool 300 through the third analog circuit 240 . Wherein, the second signal terminal includes an analog signal terminal, and the second type information includes a third analog signal. Further, the second controller 220 analyzes the first digital signal, and judges whether the battery pack 100 is suitable for continuous discharge, and generates a first judgment result representing whether it is suitable for continuous discharge, and the second controller 220 according to the first judgment result , to control the on-off of the working circuit formed by the battery pack 100 , the adapter 200 and the electric tool 300 . If the first judging result is that it is suitable to continue discharging, then turn on the working circuit; if the first judging result is not suitable to continue discharging, then turn off the working circuit.

Correspondingly, the electric tool 300 may include a fourth analog circuit 310 and a third controller 320, the fourth analog circuit 310 receives the third analog signal sent by the third analog circuit 240 in the adapter 200 through the analog signal terminal TV, and sends the third The analog signal is sent to the third controller 320, and the third controller 320 can determine the working state of the electric tool 300 according to the third analog signal. In one of the embodiments, referring to FIG. 7 , the adapter 200 further includes a second analog circuit 230 connected to the second controller 220 , and the second analog circuit 230 is used to receive the first analog circuit 230 of the first analog circuit 150 in the battery pack 100 . Two analog signals, and send the second analog signal to the second controller 220, and the third analog circuit 240 is used to convert the second analog signal or the judgment result of the second controller 220 on the second analog signal into an electric tool that can identify The third analog signal is sent to the electric tool 300 through the third analog circuit 240 .

Further, the second controller 220 analyzes the second analog signal, generates a second judgment result representing whether the battery pack 100 is suitable for continuous discharge, and controls the on-off of the working circuit based on the second judgment result.

In one of the embodiments, the second controller 220 is used to analyze the first type of information, and convert the first type of information into a third analog signal for indicating whether to allow continuous discharge, wherein the second signal terminal includes an analog signal terminal, the second type information includes a third analog signal.

In this embodiment, the second controller 220 is used to analyze the first digital signal and/or the second analog signal, and then convert it into a third analog signal suitable for electric tool identification, and the third analog signal is used to indicate whether the battery is allowed to The battery pack 100 continues to discharge, thereby realizing signal conversion between the battery pack 100 and the electric tool 300 . In practical applications, the second controller 220 can convert the first digital signal into a third analog signal, or convert the second analog signal into a third analog signal, and can also comprehensively analyze the first digital signal and the second analog signal Afterwards, a third analog signal is generated and sent to the electric tool 300 as converted second type information.

Further, the second controller 220 is also used to analyze the first digital signal and/or the second analog signal, and generate a first judgment result and a second judgment result whether it is suitable for the battery pack 100 to continue discharging, and analyze the first judgment result and the second judgment result to generate a third judgment result indicating whether to continue discharging, and control the on-off of the working circuit formed by the battery pack 100 , the adapter 200 , and the electric tool 300 based on the third judgment result.

It can be understood that when any of the first judgment result and the second judgment result is not suitable for the battery pack 100 to continue discharging, a third judgment result that is not suitable for the battery pack 100 to continue discharging is generated; otherwise, only when the first judgment result When the second judgment result is suitable for the battery pack 100 to continue discharging, a third judgment result suitable for the battery pack 100 to continue discharging is generated.

The advantage of comprehensively analyzing the first digital signal and the second analog signal is that if the adapter judges whether the battery pack 100 is allowed to continue discharging based on one of the signals alone, there will inevitably be errors, and the electric tool 300 cannot accurately control its own work. Yu's design enables the adapter to judge whether the battery pack is abnormal according to any of the two, and can pass the abnormality to the tool, so that the tool stops working and protects the battery pack in time.

To sum up, in this embodiment, the first signal terminal may only include a communication signal terminal, or may only include an analog signal terminal, or may include both a communication signal terminal and an analog signal terminal, that is, the information sent by the battery pack 100 to the adapter 200 may be Digital signals only, analog signals only, or both digital and analog signals.

Optionally, the second controller 220 can also receive the third type of information representing the working state of the electric tool 300 sent by the electric tool 300 through the fourth analog circuit 310 through the TV terminal, and control whether to disconnect the battery pack according to the third type of information 100, the working circuit between the adapter 200 and the electric tool 300.

The difference between the solution in FIG. 7 and the solution in FIG. 3 is that a switch circuit 260 is also provided in the solution in FIG. 7 . The switch circuit 260 is set on the working circuit, and the second controller 220 controls the switching of the switch circuit 260 according to the judgment result.

Specifically, the second controller 220 is connected to the switch circuit 260, and the switch circuit 260 can be a MOS switch circuit. When the judgment result is that the battery pack 100 is not suitable for continuous discharge, the switch circuit 260 is disconnected to ensure that the working circuits of the three are disconnected to ensure It is safe to work, otherwise, the switch circuit 260 is turned on to ensure the conduction of the working circuit, so as to realize the on-off control of the working circuit formed by the battery pack 100 , the adapter 200 and the electric tool 300 .

The difference between the solution in FIG. 7 and the solution in FIG. 3 is that a second current sampling unit is also provided in the solution in FIG. Based on current information and judgment results, the on-off of the working loop is controlled.

Specifically, referring to FIG. 7, the second current sampling unit can be a sampling resistor R2 connected in series in the working loop, and the second controller 220 is connected to the sampling resistor R2, and collects information on the sampling resistor R2, and then determines the current in the discharge loop. current. If the second controller 220 judges that the current in the discharge circuit is in an abnormal state, it is judged that the battery pack 100 is no longer suitable for continuous discharge. , after the second controller 220 controls to send the second type of information to the electric tool 300 through the second signal terminal, it controls to turn off the switch circuit 260 and cut off the working circuit.

In one of the embodiments, referring to FIG. 8 , the adapter 200 is also provided with an analog signal terminal BS, and the third analog signal includes two types of signals, which are transmitted to the electric tool 300 through two analog signal terminals BS and TV respectively; Specifically, the electric tool 300 is also provided with two corresponding analog signal terminals for receiving the two different types of analog signals. For example, the TV terminal transmits a high/low temperature analog signal or a high/low voltage analog signal that is not allowed to continue discharging and is suitable for identification by the electric tool 300, or is used to represent a signal that is allowed to continue discharging and is suitable for identification by the electric tool 300. Normal temperature/voltage analog signal; the BS terminal transmits a temperature/voltage signal that is used to represent the calculated whether to allow continuous discharge and is suitable for identification by the electric tool 300. The temperature or voltage signal is expressed as a specific voltage value, which can be determined according to The specific specifications of the battery pack are defined and obtained.

Specifically, the second controller 220 can also convert the first digital signal into a fourth analog signal suitable for recognition by the electric tool 300 , and send the fourth analog signal to the second signal terminal of the electric tool 300 through the BS terminal. At this time, the analog signal terminal TV of the electric tool receives the third analog signal indicating whether to continue discharging, and the analog signal terminal BS of the electric tool receives the fourth analog signal indicating the discharge capacity of the battery pack. Among them, the fourth analog signal is used to characterize the analog quantity of the discharge capacity of the battery pack. The discharge capacity of the battery pack includes the capacity of the battery pack, the voltage of the battery pack, the type of batteries in the battery pack, the maximum discharge current allowed by the battery pack, etc. inherent properties of its own capabilities.

Further, the second controller 220 is also used for analyzing the first digital signal, and judging whether the battery pack 100 is suitable for continuous discharge, and generating a first judgment result representing whether it is suitable for continuous discharge. The second controller 220 based on the first As a result of the judgment, the on-off of the working circuit formed by the battery pack 100 , the adapter 200 and the electric tool 300 is controlled.

Optionally, the second controller 220 can also receive the third type of information representing the working state of the electric tool 300 sent by the electric tool 300 through the fourth analog circuit 310 through the BS and TV terminals, and control whether to disconnect the power tool according to the third type of information A working circuit between the battery pack 100 , the adapter 200 and the electric tool 300 .

The difference between the scheme in FIG. 8 and the scheme in FIG. 7 is that in the scheme in FIG. 8 , a fourth analog signal representing the discharge capacity of the battery pack is also transmitted, so that the power tool side can obtain the analog quantity corresponding to the discharge capacity of the battery pack. At this time, 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 of each other, and the third analog signal and the fourth analog signal are transmitted to the electric tool through different terminals, which helps Improve the transmission efficiency of each analog signal.

For the specific forms and implementable manners of the third analog signal and the fourth analog signal, please refer to the description in Embodiment 1, which will not be repeated here.

In one of the embodiments, referring to FIG. 9, the adapter 200 further includes a third digital communication circuit 250, and the second controller 220 can also convert the received first type information into a second digital communication circuit 250 through the third digital communication circuit 250. The signal is transmitted to the power tool 300 . That is, the second controller 220 converts the first digital signal into a second digital signal, or converts the second analog signal into a second digital signal, or comprehensively analyzes the first digital signal and the second analog signal to generate a second digital signal , transmitted to the electric tool 300 through the BE terminal.

Wherein, the first digital signal is based on the first digital communication protocol, and the second digital signal is often based on the second digital communication protocol different from the first digital communication protocol, therefore, the second controller 220 will be based on the first digital communication protocol The first digital signal is converted into a second digital signal based on the second digital communication protocol, which facilitates information identification of the electric tool 300; meanwhile, the second controller 220 is based on the first digital communication protocol.

It can be seen from the above that the adapter 200 can convert the first type of information into an analog signal for indicating whether to allow continuous discharge or a digital signal for indicating whether to allow continuous discharge, or a digital signal for indicating the real-time status of the battery pack, or use At least one of the digital signals representing the discharge capacity of the battery pack is sent to the electric tool 300 .

Further, the controller 220 analyzes and generates a first judgment result and a second judgment result whether it is suitable for the battery pack 100 to continue discharging according to the received first type information, analyzes the first judgment result and the second judgment result, and generates Based on the third judgment result indicating whether to allow continuous discharge, and based on the third judgment result, the on-off of the working circuit formed by the battery pack 100 , the adapter 200 , and the electric tool 300 is controlled.

Optionally, the second controller 220 can also receive the third type of information representing the working state of the electric tool 300 sent by the electric tool 300 through the fourth analog circuit 310 through the BE and TV terminals, and control whether to disconnect the power tool according to the third type of information A working circuit among the battery pack 100 , the adapter 200 and the electric tool 300 .

In one of the embodiments, referring to FIG. 9 , the communication signal terminal BE can also be used as a multiplexing terminal, that is, in practical applications, the communication signal terminal BE can transmit both analog signals and digital signals.

In one of the embodiments, referring to FIG. 9 , the electric tool 300 may include a first current sampling unit and a third controller 320, and the first current sampling unit collects the current of the working loop formed by the battery pack 100, the adapter 200, and the electric tool 300. information, and control its own work based on the current information and the second type information. That is, the electric tool 300 not only controls its own operation according to the second type information converted from the first type information sent by the battery pack 100 , but also can make a comprehensive judgment in combination with the collected current information on the working circuit.

The difference between the solution in Figure 9 and the solution in Figure 7 is that in the solution in Figure 9, a second digital signal representing at least one of the real-time status information of the battery pack, the discharge capacity, and whether to allow continuous discharge is also transmitted, so that the electric tool side can know the battery The digital quantity corresponding to the specific state information of the package.

The difference between the scheme in FIG. 8 and the scheme in FIG. 4, and the difference between the scheme in FIG. 9 and the scheme in FIG. 5 are consistent with the difference between the scheme in FIG. 7 and the scheme in FIG.

In this embodiment, referring to FIGS. 7-9 , the power tool 300 also includes a power supply circuit 340 and a motor control unit 350. 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 to the working In the loop, a third controller 320 is connected at the same time, and the third controller 320 controls the electric tool 300 by controlling the working state of the motor control unit 350 .

Regarding the activation manner of the battery pack provided in this embodiment and the specific details of the power tool system, please refer to the specific description in Embodiment 1, which will not be repeated here.

Embodiment five

This embodiment provides an adapter 200 , referring to FIGS. 1-4 , the adapter 200 is used to connect the battery pack 100 and the electric tool 300 . The adapter 200 in this embodiment is applicable to the electric tool 300 configured with positive and negative terminals (B+, B-) and analog signal terminals (TV), or configured with positive and negative terminals (B+, B-), analog signal terminals (TV, BS) electric tools, or electric tools equipped with positive and negative terminals (B+, B-), analog signal terminals (TV), communication signal terminals (BE), or equipped with positive and negative terminals (B+, B-), electric tools with communication signal terminal (BE).

The adapter includes a first end connected to the battery pack and a second end connected to the power tool;

The battery pack monitors the state of its own single cell and/or the state of the whole pack, obtains the first type of information, and sends the first type of information to the adapter through the first signal terminal;

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

The above-mentioned adapter 200 can convert the first type of information sent by the battery pack 100 into the second type of information suitable for each electric tool 300 to identify and send it to the electric tool 300, so that the electric tool 300 can control its own work according to the second type of information, The adapter 200 can convert the first type of information about the state of the battery pack (including the state of a single battery cell and/or the state of the whole pack) sent by the battery pack 100 into a second type of information suitable for each electric tool 300 to identify and send it to the electric power tool 300. Tool 300, so that the electric tool 300 can know the real-time state information of the battery pack, and then control the working state of itself and the battery pack according to the second type of information, thereby realizing the refinement of the battery pack based on the real-time state information of the battery pack Over-discharge protection effectively prolongs the life of the battery pack.

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

In one embodiment, the first signal terminal includes an analog signal terminal, the first type information includes a second analog signal, and the second analog signal is used to indicate whether it is suitable to continue discharging.

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 of the embodiments, the adapter includes a second controller, and the second controller is used to analyze the first digital signal and the second analog signal, and generate a third analog signal representing whether to allow continuous discharge, and convert the third analog signal to The signal is sent to the second signal terminal, the third analog signal is suitable for identification of the electric tool 300 , the second signal terminal includes an analog signal terminal, and the second type information includes the third analog signal.

In one of the embodiments, the second controller is further 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 includes a communication signal terminal, and the second The type information includes the second digital signal.

In one embodiment, when the electric tool is connected to the battery pack through the adapter, the adapter sends the activation signal sent by the second signal terminal of the electric tool to the battery pack through the first signal terminal of the battery pack to activate the battery pack.

The adapter 200 provided in this embodiment and the adapter 200 in the power tool system provided in Embodiment 1 belong to the same inventive concept. For the specific content of the above-mentioned adapter 200 provided in this embodiment, please refer to the specific description in Embodiment 1, here No longer.

Embodiment six

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

The above-mentioned adapter 200, the adapter 200 can judge whether to allow the battery pack 100 to continue discharging based on the first type of information sent by the battery pack 100, and control the on-off of the 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 external discharge process of the battery pack 100 according to the state of the battery pack 100 in time, so as to ensure the safety and lifespan of the electric tool 300 and the battery pack 100 .

In one of the embodiments, 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, and the second controller is used to analyze the first digital signal and generate a signal used to represent whether it is suitable or not. The first judgment result of the discharge is continued, and the on-off of the working circuit formed by the battery pack 100 , the adapter 200 and the electric tool 300 is controlled based on the first judgment result.

In one of the embodiments, the first signal terminal includes an analog signal terminal, the first type information includes a second analog signal, and the second controller is used to analyze the second analog signal and generate a second judgment result representing whether it is suitable to continue discharging , and control the on-off of the working circuit formed by the battery pack 100 , the adapter 200 and the electric tool 300 based on the second judgment result.

In one of the embodiments, the second controller is used to analyze the first judgment result and the second judgment result, and generate a third judgment result representing whether to allow continuous discharge, and control the on-off of the working circuit based on the third judgment result .

In one of the embodiments, the second controller 220 can also receive the third type of information representing the working state of the electric tool 300 sent by the electric tool 300, and control whether to disconnect the battery pack 100, the adapter 200 and The working circuit between the electric tools 300, wherein the third type of information can be determined according to the actual terminals of the adapter 200 and the electric tool 300, and may only include digital signals, may only include analog signals, or may include both digital and analog signals.

In one embodiment, the adapter 200 includes a switch circuit 260, the switch circuit 260 is arranged on the working circuit, and the second controller controls the switching of the switch circuit 260 according to the judgment result.

Specifically, the adapter may include a second current sampling unit for collecting current information of the working loop, and the second controller controls the on-off of the working loop based on the current information and the judgment result.

The adapter 200 provided in this embodiment and the adapter 200 in the power tool system provided in Embodiment 3 belong to the same inventive concept. For the specific content of the above-mentioned adapter 200 provided in this embodiment, please refer to the specific description in Embodiment 3, here No longer.

Embodiment seven

This embodiment provides an adapter 200 , referring to FIGS. 1-9 , the adapter 200 is used to connect the battery pack 100 and the electric tool 300 . The adapter 200 in this embodiment is suitable for an electric tool 300 equipped with positive and negative terminals (B+, B-) and analog signal terminals (TV), or configured with positive and negative terminals (B+, B-), analog signal terminals (TV, BS) electric tools, or electric tools equipped with positive and negative terminals (B+, B-), analog signal terminals (TV), communication signal terminals (BE), or equipped with positive and negative terminals (B+, B-), electric tool with communication signal terminal (BE).

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

The adapter 200 also converts the first type of information into a second type of information suitable for electric tool identification, and sends the second type of information to the second signal terminal of the electric tool;

The above-mentioned adapter 200 can convert the first type of information sent by the battery pack 100 into the second type of information suitable for each electric tool 300 and send it to the electric tool 300, so that the electric tool 300 can control its own work according to the second type of information , the adapter 200 can convert the first type of information about the state of the battery pack (including the state of a single battery cell and/or the state of the whole pack) sent by the battery pack 100 into a second type of information suitable for identification by each electric tool 300 and send it to The electric tool 300, so that the electric tool 300 can know the real-time state information of the battery pack, and then can control the working state of itself and the battery pack according to the second type of information, so that the battery pack can be refined based on the real-time state information of the battery pack Over-discharge protection effectively prolongs the life of the battery pack.

The above-mentioned adapter 200 can also 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 the working circuit 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 external discharge process of the battery pack 100 according to the state of the battery pack 100 in time, so as to ensure the safety and lifespan of the electric tool 300 and the battery pack 100 .

In one of the embodiments, 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, and the second controller 220 is used to convert the first digital signal into The second type of signal identified by the tool 300 is sent to the electric tool for its control work, and the second controller 220 is also used to analyze the first digital signal and generate a first judgment result representing whether it is suitable to continue discharging, and based on the first judgment As a result, the on-off of the working circuit formed by the battery pack 100 , the adapter 200 and the electric tool 300 is controlled.

In one of the embodiments, the first signal terminal includes an analog signal terminal, the first type information includes a second analog signal, and the second controller 220 is configured to convert the second analog signal into a second type suitable for recognition by the electric tool 300 The signal is sent to the electric tool 300 for its control work, and the second controller 220 is also used to analyze the second analog signal and generate a second judgment result representing whether it is suitable to continue discharging, and control the battery pack 100, On and off of the working circuit formed by the adapter 200 and the electric tool 300 .

In one of the embodiments, the adapter includes a second controller 220, and the second controller 220 is configured to analyze the first digital signal and the second analog signal, and generate a third analog signal for indicating whether to allow continuous discharge, and The third analog signal is sent to the second signal terminal, the third analog signal is suitable for identification of the electric tool 300 , the second signal terminal includes an analog signal terminal, and the second type information includes the third analog signal.

In one of the embodiments, the second controller 220 is further 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 includes a communication signal terminal, the second The type two information includes a second digital signal.

In one of the embodiments, the second controller 220 is used to convert the first type of information into a third analog signal and a second digital signal, and send 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 a third analog signal and a second digital signal.

In one of the embodiments, the second controller 220 is configured to analyze the first judgment result and the second judgment result, and generate a third judgment result representing whether to allow continuous discharge, and control the operation of the working loop based on the third judgment result. on and off.

In one of the embodiments, the adapter 200 includes a switch circuit 260, the switch circuit 260 is arranged on the working circuit, and the second controller 220 controls the switching of the switch circuit 260 according to the judgment result.

In one of the embodiments, when the electric tool 300 is connected to the battery pack 100 through the adapter 200, the adapter 200 sends the activation signal sent by the second signal terminal of the electric tool 300 to the battery pack 100 through the first signal terminal of the battery pack 100, to activate the battery pack 100 .

In one of the embodiments, the adapter 200 is also provided with a load activation circuit 270. When the electric tool 300 is connected to the battery pack 100 through the adapter 200, the load activation circuit 270 generates an activation signal by itself and sends it to the second controller 220 and or 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, and or the first controller 130, and then executes the above-described signal Transfer, analyze and judge and control the process.

Specifically, referring to FIGS. 7-9 , a sampling resistor R1 can be connected in series between the two charging terminals of the electric tool 300. The first current sampling unit is the sampling resistor R1. The third controller 320 collects the current collected by the sampling resistor. information, and then determine the magnitude of the current in the discharge circuit. If the current is in an abnormal state, it means that the battery pack 100 is no longer suitable for continuous discharge. In practical applications, it can be set as: if any one of the current information and the second type of information represents If the discharge cannot be continued, stop the discharge.

The adapter 200 provided in this embodiment and the adapter 200 in the power tool system provided in Embodiment 4 belong to the same inventive concept. For the specific content of the adapter 200 provided in this embodiment, please refer to the specific description in Embodiment 4. This will not be repeated here.

The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

The above-mentioned embodiments only express several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but should not be construed as limiting the patent scope of the invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims

An electric tool system, characterized in that the electric tool system includes a battery pack, an adapter, and an electric tool, the battery pack includes a positive terminal, a negative terminal, and a first signal terminal, and the electric tool includes a positive terminal, a negative terminal and a second signal terminal, the adapter includes a first end connected to the battery pack and a second end connected to the electric tool;

The battery pack monitors the state of its own single battery cell and/or the state of the whole pack, obtains the first type information, and sends the first type information to the adapter through the first signal terminal;

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

The electric tool controls its own work based on the second type of information input from the second signal terminal.
The power tool system according to claim 1, wherein the first signal terminal comprises a communication signal terminal, and the first type of information comprises a first digital signal.
The power tool system according to claim 1, wherein the first signal terminal comprises an analog signal terminal, and the first type information comprises a second analog signal.
The electric tool system according to claim 1, wherein 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.
The power tool system according to any one of claims 2-4, wherein the adapter includes a second controller, the second controller is configured to analyze the first type information and convert the first The type information is converted into a third analog signal for representing whether to continue discharging, the second signal terminal includes an analog signal terminal, and the second type information includes the third analog signal.
The electric tool system according to claim 5, wherein when the second controller judges that at least one of the first digital signal and the second analog signal is not suitable for continuing to discharge, the generating is used to represent the third analog signal that the continuation of the discharge is not allowed, otherwise a third analog signal that is used to represent the continuation of the discharge is generated.
The electric tool system according to claim 6, characterized in that, the third analog signal used to indicate that continuation of discharge is not allowed includes a high temperature analog signal or a low temperature analog signal suitable for identification of the electric tool, and is used to indicate that continuation of discharge is allowed The third analog signal includes a normal temperature analog signal suitable for identification by the power tool.
The power tool system according to claim 2 or 4, wherein the adapter includes a second controller for converting the first digital signal into a signal suitable for the recognition of the power tool a fourth analog signal, and send the fourth analog signal to the second signal terminal, the second signal terminal includes an analog signal terminal, and the second type information includes the fourth analog signal.
The electric tool system according to any one of claims 2-4, wherein the adapter includes a second controller, the second controller is configured to convert 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 includes a communication signal terminal, and the second type information includes the second digital signal.
The power tool system according to any one of claims 2-4, wherein the adapter includes a second controller, the second controller is used to convert the first type of information into a third analog signal and second digital signal, and send 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 The third analog signal and the second digital signal.
The electric tool system according to claim 1, wherein when the electric tool is connected to the battery pack through the adapter, the electric tool passes through the second signal terminal, the adapter and the second signal terminal. A signal terminal for sending an activation signal to the battery pack.
The electric tool system according to claim 1, wherein the electric tool comprises a third controller and a first current sampling unit, and the first current sampling unit is used to collect data from the battery pack, the adapter and The current information on the working circuit formed by the electric tool, the third controller controls the operation of the electric tool based on the current information and the second type information.
The power tool system according to claim 1, wherein,

The adapter judges whether to allow the battery pack to continue discharging according to the first type information; and controls the on-off of the working circuit formed by the battery pack, the adapter and the electric tool according to the judgment result.
The power tool system of claim 13, wherein:

The priority of the adapter controlling the on-off of the working circuit formed by the battery pack, the adapter and the electric tool according to the judgment result is lower than that of the adapter sending the second type information to the second signal terminal priority.
The power tool system of claim 13, wherein:

The first signal terminal includes a communication signal terminal, and the first type of information includes a first digital signal;

The adapter includes a second controller, the second controller analyzes the first digital signal and generates a first judgment result representing whether it is suitable to continue discharging, and controls the battery pack based on the first judgment result , On-off of the working circuit formed by the adapter and the electric tool.
The power tool system of claim 13, wherein:

The first signal terminal includes an analog signal terminal, and the first type information further includes a second analog signal;

The adapter includes a second controller, the second controller analyzes the second analog signal and generates a second judgment result representing whether it is suitable to continue discharging, and controls the battery pack based on the second judgment result , On-off of the working circuit formed by the adapter and the electric tool.
The power tool system according to claim 15 or 16, characterized in that,

The adapter includes a switch circuit, the switch circuit is arranged on the working circuit, and the second controller controls the switching of the switch circuit according to the judgment result.
The power tool system of claim 13, wherein:

The adapter includes a second current sampling unit, the second current sampling unit is used to collect current information of the working loop, and the second controller controls the current information of the working loop based on the current information and the judgment result. on and off.
A power tool system, characterized in that,

The electric tool system includes a battery pack, an adapter and an electric tool, the battery pack includes a positive terminal, a negative terminal and a first signal terminal, the electric tool includes a positive terminal and a negative terminal, the adapter includes a a first end connected to and a second end connected to said power tool;

The battery pack monitors the state of its own single battery cell and/or the state of the whole pack, obtains the first type information, and sends the first type information to the adapter through the first signal terminal;

The adapter judges whether to allow the battery pack to continue discharging according to the first type information; and controls the on-off of the working circuit formed by the battery pack, the adapter and the electric tool according to the judgment result.
The power tool system of claim 19, wherein:

The first signal terminal includes a communication signal terminal, and the first type of information includes a first digital signal;

The adapter includes a second controller, the second controller analyzes the first digital signal and generates a first judgment result representing whether it is suitable to continue discharging, and controls the battery pack based on the first judgment result , On-off of the working circuit formed by the adapter and the electric tool.
The power tool system of claim 19, wherein:

The first signal terminal includes an analog signal terminal, and the first type information further includes a second analog signal;

The adapter includes a second controller, the second controller analyzes the second analog signal and generates a second judgment result representing whether it is suitable to continue discharging, and controls the battery pack based on the second judgment result , On-off of the working circuit formed by the adapter and the electric tool.
The power tool system according to claim 20 or 21, characterized in that,

The adapter includes a switch circuit, the switch circuit is arranged on the working circuit, and the second controller controls the switching of the switch circuit according to the judgment result.
The power tool system of claim 19, wherein:

The adapter includes a second current sampling unit, the second current sampling unit is used to collect current information of the working loop, and the second controller controls the current information of the working loop based on the current information and the judgment result. on and off.