CN111409044A - Combination of battery pack and electric tool - Google Patents
Combination of battery pack and electric tool Download PDFInfo
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- CN111409044A CN111409044A CN202010019623.9A CN202010019623A CN111409044A CN 111409044 A CN111409044 A CN 111409044A CN 202010019623 A CN202010019623 A CN 202010019623A CN 111409044 A CN111409044 A CN 111409044A
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- tool
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/488—Cells or batteries combined with indicating means for external visualization of the condition, e.g. by change of colour or of light density
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4278—Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Mechanical Engineering (AREA)
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention discloses a combination of a battery pack and an electric tool, the electric tool comprises: the tool communication module is used for outputting an electric quantity display activation signal; a tool power module for providing power to the tool communication module; the tool communication module is configured to: after receiving the electric energy of the tool power supply module, outputting an electric quantity display activation signal to the battery pack; the battery pack includes: the battery pack communication module is used for establishing communication connection with the tool communication module so as to transmit an electric quantity display activation signal; the electric quantity display module is used for displaying the electric quantity of the battery pack; a battery pack control module configured to: receiving an electric quantity display activation signal transmitted by a battery pack communication module; and after receiving the electric quantity display activation signal transmitted by the battery pack communication module, controlling the electric quantity display module to display the electric quantity of the battery pack. The combination of the battery pack and the electric tool can avoid that a user forgets to check the electric quantity of the battery pack and the service time of the battery pack is estimated by mistake, and the electric quantity display cost is lower.
Description
Technical Field
The invention relates to a combination of a battery pack and an electric tool.
Background
With the wide application of electric tools, the functional requirements of users on the battery pack are more and more diversified, and the requirements are higher and higher.
The electric quantity of battery package is shown through the electric quantity display module that sets up the battery package on the instrument to current electric tool, and the user shows the electric quantity of battery package through the electric quantity display switch that operates on the electric tool, like this, owing to set up respectively on electric tool and battery package and all be provided with electric quantity display module, both increased the cost, also make electric tool's design more complicated. If the electric quantity of the battery pack is displayed by the electric quantity display component of the battery pack, the cost can be reduced, but the problems exist: before the battery pack is used for supplying power to the electric tool, the electric quantity display switch on the battery pack needs to be triggered manually, the electric quantity of the battery pack can be checked, so that the working time of the battery pack is estimated to determine whether charging is needed, and if the battery pack is inserted or the electric tool is started after the battery pack is inserted, a user forgets to trigger the electric quantity display switch of the battery pack to check the voltage of the battery pack, so that the time for using the battery of the tool can be estimated mistakenly, and the occurrence of adverse conditions such as overdischarge of the battery pack can be caused.
Disclosure of Invention
In order to solve the defects of the prior art, the invention aims to provide a combination of a battery pack and an electric tool, which can avoid the situation that a user forgets to check the electric quantity of the battery pack to estimate the service time of the battery pack by mistake and has lower electric quantity display cost.
In order to achieve the above object, the present invention adopts the following technical solutions:
in combination, a battery pack detachably mountable to a power tool for supplying power thereto, the power tool comprising: the tool communication module is used for outputting an electric quantity display activation signal; a tool power module for providing electrical power to the tool communication module; the tool communication module is configured to: after receiving the electric energy of the tool power supply module, outputting the electric quantity display activation signal to the battery pack; the battery pack includes: the battery pack communication module is used for establishing communication connection with the tool communication module so as to transmit the electric quantity display activation signal; the electric quantity display module is used for displaying the electric quantity of the battery pack; a battery pack control module configured to: receiving the electric quantity display activation signal transmitted by the battery pack communication module; and after the electric quantity display activation signal transmitted by the battery pack communication module is received, controlling the electric quantity display module to display the electric quantity of the battery pack.
Optionally, the power tool comprises: the tool positive terminal is used for connecting the positive power supply terminal of the battery pack; a tool negative terminal for connection to a negative power terminal of a battery pack; the electronic switch is electrically connected between the tool power supply module and the tool positive terminal; and the power-on module is electrically connected with the electronic switch and is used for controlling the electronic switch to be conducted so as to enable the tool power supply module to provide electric energy for the tool communication module.
Optionally, the power tool further comprises: the power supply maintaining module is electrically connected with the electronic switch and the control module; and the tool control module is used for controlling the power supply maintaining module after the power-on module fails so as to enable the power supply maintaining module to continuously control the electronic switch to be conducted.
Optionally, the power-up module is further electrically connected to the tool positive terminal, and the power-up module includes: the first trigger circuit is electrically connected with the electronic switch and the positive terminal of the tool and used for triggering the electronic switch to be conducted; the first trigger circuit includes: the semiconductor switch is electrically connected with the electronic switch and is used for controlling the electronic switch to be conducted; the first capacitor is electrically connected with the semiconductor switch and used for controlling the semiconductor switch to be conducted; the first capacitor is electrically connected to the tool positive terminal for charging by the battery pack connected to the tool positive terminal; a first discharge resistor connected in parallel with the first capacitor for providing a discharge path for the first capacitor.
Optionally, the power tool comprises: a motor for driving the tool attachment; an operating mechanism operable to start the motor; a trigger switch connected in association with the operating mechanism to be triggered by the operating mechanism; the power-up module is further electrically connected with the trigger switch, and is configured to: after the battery pack is installed on the electric tool and the trigger switch is triggered, the electronic switch is controlled to be conducted so that the tool power supply module provides electric energy for the tool communication module.
Optionally, the power-on module is further electrically connected to the trigger switch, and the power-on module includes: the second trigger circuit is electrically connected with the electronic switch and the trigger switch and is used for triggering the electronic switch to be conducted; the second trigger circuit includes: a second capacitor electrically connected to the electronic switch and the tool positive terminal; a second discharge resistor connected in parallel with the second capacitor for providing a discharge path for the second capacitor; the trigger switch is provided with a first connecting end and a second connecting end, the first connecting end of the trigger switch is electrically connected with the second capacitor and used for conducting a charging path of the second capacitor, and the second connecting end of the trigger switch is grounded.
Optionally, the battery pack includes: the detection module is used for detecting the electrical parameters of the battery pack; the battery pack control module is configured to: and outputting an action signal to the electric tool according to the electrical parameter of the battery pack detected by the detection module so that the electric tool acts according to the action signal.
Optionally, the battery pack system chip is integrated with: an analog front end for inputting analog quantities characterizing electrical parameters of the battery pack; and the microcontroller is used for outputting an action signal to the electric tool according to the analog quantity input by the analog front end so as to enable the electric tool to act according to the action signal.
Optionally, the tool communication module comprises a tool wireless communication module, and the battery pack communication module comprises a battery pack wireless communication module; the tool wireless communication module is used for establishing wireless communication connection with the battery pack communication module so as to transmit the electric quantity display activation signal to the battery pack.
Optionally, the tool communication module comprises a tool communication terminal and the battery pack communication module comprises a battery pack communication terminal; the tool communication terminal is used for being connected with the battery pack communication terminal so as to transmit the electric quantity display activation signal to the battery pack.
The combination of the battery pack and the electric tool can automatically display the electric quantity of the battery pack after the battery pack is installed on the electric tool or before the motor is started, so that the phenomenon that a user forgets to check the electric quantity of the battery pack to estimate the service time of the battery pack by mistake can be avoided, and the electric quantity display cost is low.
Drawings
Fig. 1 is a perspective view of a battery pack and a power tool;
fig. 2 is a perspective view of the battery pack;
FIG. 3 is an internal structural view of the battery pack;
fig. 4 is a block diagram of an internal circuit of the battery pack and the electric power tool of the first embodiment;
FIG. 5 is a detailed circuit diagram of a portion of the power tool of FIG. 4;
fig. 6 is a block diagram of an internal circuit of the battery pack and the electric power tool of the second embodiment;
FIG. 7 is a partial detailed circuit diagram of the power tool shown in FIG. 6;
fig. 8 is a block diagram of an internal circuit of the battery pack and the electric power tool of the third embodiment;
FIG. 9 is a partial detailed circuit diagram of the power tool of FIG. 8;
fig. 10 is a block diagram showing a system chip of the battery pack according to the embodiment.
Detailed Description
The invention is described in detail below with reference to the figures and the embodiments.
Referring to a combination of a battery pack and a power tool shown in fig. 1, the battery pack 10 is detachably mounted to the power tool 20 for supplying electric power to the power tool 20. The power tool 20 includes: a housing 21; a tool attachment (not shown) for performing the function of the power tool 20; and a motor 22 accommodated in the housing 21 for outputting power to drive the tool attachment.
Optionally, the power tool 20 further includes an operating mechanism 23 for operation by a user to activate the power tool 20.
The power tool 20 further includes a handle 24 to be held by a user, the handle 21 may be formed by the housing 21, or may be formed separately or mounted, and the operating mechanism 23 is provided at the handle 24 to be conveniently operated by the user.
Referring to fig. 2 and 3, the battery pack 10 mainly includes a housing 11 and a battery pack 12 (fig. 3), the battery pack 12 is accommodated in the housing 11, the battery pack 12 includes a plurality of battery cells 121 (fig. 3), and the plurality of battery cells 121 are electrically connected to form the battery pack 12. The housing 11 is formed with a coupling portion 111 for mating with a battery pack coupling portion of the power tool 20 to mount the battery pack 10 to the power tool 20.
The battery pack 10 also includes positive and negative power terminals B + and B-for connection to the tool positive terminal T + and tool negative terminal T-of the power tool 20, respectively (fig. 4), for transferring electrical energy. Wherein, the positive power supply terminal B + and the negative power supply terminal B-are respectively electrically connected with the positive pole and the negative pole of the electric core group 12.
Optionally, the battery pack 10 further includes a battery pack communication terminal BD for connecting with the communication terminal TD of the power tool 20 to transmit an electrical signal.
Referring to fig. 4, the battery pack 10 further includes a battery pack control module 13 and a power amount display module 16. The power display module 16 is used for displaying the power of the battery pack 10, and includes an indication component 161 (fig. 3), the indication component 161 is not limited to an indication lamp, and the number of the indication lamps may be multiple. The battery pack control module 13 is used for controlling the power display module 16 to display the power of the battery pack 10.
Optionally, the battery pack 10 further includes a detection module 18. The detection module 18 is used for detecting the electrical parameters of the battery pack 10. The battery pack control module 13 is further configured to: and outputting an action signal to the electric tool 20 according to the detected electrical parameter of the battery pack 10 of the detection module 18, so that the electric tool 20 executes the relevant operation according to the action signal given by the battery pack 10.
When the battery pack 10 is mounted to the power tool 20, the battery pack 10 outputs an action signal to the power tool 20 according to the detected electrical parameter by the detection module 18, so that the power tool 20 performs a relevant operation according to the action signal given by the battery pack 10.
The battery pack 10 may further include a memory for storing current and historical electrical parameters of the battery pack 10 detected by the detection module 18 of the battery pack 10, as well as attribute information of the battery pack 10, wherein the electrical parameters of the battery pack 10 include, but are not limited to, temperature, voltage, current, peak current, and/or the like of the battery pack. The attribute information of the battery pack 10 includes, but is not limited to: rated voltage, rated current, battery chemistry, maximum discharge current, maximum charge current, etc.
For example, when the battery pack 10 is mounted on the power tool 20 and the detection module 10 detects that the temperature of the battery pack exceeds a preset temperature threshold, a prohibition signal is output to the power tool 20, and the power tool 20 controls the motor 22 of the power tool 20 to stop operating according to the prohibition signal.
For another example, when the battery pack 10 is mounted on the power tool 20 and the detection module 18 detects that the current of the battery pack 10 exceeds the maximum discharge current, a disable signal is output to the power tool 20, and the power tool 20 controls the motor 22 to stop operating according to the disable signal.
In this way, the electric tool 20 performs related operations according to the signals of the battery pack 10, the discharge capacity of the battery pack 10 can be utilized to the maximum, and one battery pack 10 can supply power for a plurality of electric tools 10 or a plurality of electric tools 20 can use the same battery pack 10, thereby improving the compatibility of the battery pack 10. The battery pack 10 can provide the electric tool action signal according to the information related to the battery management, so that the electric tool 20 can execute the related operation according to the action signal provided by the battery pack 10, convenience is brought to the compatibility of the electric tool 20 and the battery pack 10 in the future, and the battery pack 20 has higher integration level, more compact structure and higher reliability.
Optionally, the battery pack 10 further comprises an electronic switch 17, the electronic switch 17 is electrically connected between the positive electrode of the electric core group 12 and the positive power supply terminal B +, or between the negative electrode of the electric core group 12 and the negative power supply terminal B-, and a control terminal of the electronic switch 17 is electrically connected with the battery pack control module 13, and the electronic switch 17 is configured to be turned on or off according to a control signal given by the battery pack control module 13, so that the battery pack 10 stops discharging or charging.
Referring to fig. 4, the power tool 20 further includes a tool connection terminal, a tool communication module 28, a tool power module 27, a tool control module 25, and a drive circuit 26.
The tool connection terminals include a tool positive terminal T + and a tool negative terminal T-, which are respectively used to connect with a positive power terminal B + and a negative power terminal B-of the battery pack 10 to transmit electric power. Optionally, the power tool 20 further includes a tool communication terminal TD for connection with the battery pack communication terminal BD of the battery pack 10 to transmit an electrical signal.
The tool communication module 28 is configured to output a power display activation signal. The battery pack 10 is further provided with a battery pack communication module 15, wherein the battery pack communication module 15 is configured to establish a communication connection with the tool communication module 28 to transmit the power display activation signal, and specifically, the battery pack communication module 15 is configured to receive the power display activation signal output by the tool communication module 28 after establishing a communication connection with the tool communication module 28, and send the power display activation signal to the battery pack control module 13. The battery pack control module 13 of the battery pack 10 is configured to: receiving the power display activation signal transmitted by the battery pack communication module 13, and controlling the power display module 16 to display the power of the battery pack 10 after receiving the power display activation signal transmitted by the battery pack communication module 13.
Of course, the transmission of the power display activation signal between the tool communication module 28 and the battery pack communication module 15 is not limited to the transmission, and other information, such as the temperature of the battery pack 10 and the like, and the remaining power of the battery pack 10, may be transmitted.
In some embodiments, the tool communication module 28 comprises a tool wireless communication module, and the battery pack communication module 15 comprises a battery pack wireless communication module, for establishing a wireless communication connection with the battery pack communication module to transmit the power display activation signal to the battery pack 10. That is, the tool communication module 28 and the battery pack communication module 15 are wireless communication modules, and communicate with each other wirelessly.
In other embodiments, tool communication module 28 includes a tool communication terminal TD and battery pack communication module 13 includes a battery pack communication terminal BD, the tool communication terminal TD being configured to interface with battery pack communication terminal BD to transmit a charge display activation signal to the battery pack 10. That is, the tool communication module 28 and the battery pack communication module 15 communicate with each other by wire communication. The battery pack communication module 15 also includes communication circuitry for converting electrical signals transmitted by the tool communication module 28 into electrical signals that can be recognized by the battery pack control module 13.
The tool power module 27 is used to provide power to the tool communication module 28. The tool power supply module 27 is configured to: upon receiving the power from the tool power module 27, a power display activation signal is output to the battery pack 10. Optionally, the tool power module 27 is also electrically connected to the tool control module 25 for converting electrical energy from the battery pack 10 into electrical energy usable by the tool control module 25. The tool power module 27 may include a power circuit or power conversion circuit that may select a dedicated power chip or hardware circuit, such as a DC-DC conversion chip.
The tool control module 25 is used for controlling the operation of the power tool 20 and is electrically connected to the motor 22, for example, the tool control module 25 controls the start, brake, stop, rotation speed, rotation direction, etc. of the motor 22. In some embodiments, tool control module 25 employs a dedicated control chip (e.g., MCU, micro control Unit, Microcontroller Unit).
The driving circuit 26 is electrically connected to the tool control module 25 and the motor 22, and is configured to receive a control signal from the tool control module 25 to drive the motor 22 to output power. In one embodiment, the motor 22 is a brushless motor, and the power tool 20 further includes a tool control module 25 electrically connected to the motor 22 via a drive circuit 26.
The tool communication module 28 is electrically connected to the tool control module 25 of the power tool 20 for electrical connection to the communication module 250 of the battery pack 10 to enable the power tool 20 to communicate with the battery pack 10. The tool communication module 28 is embodied as a communication circuit. The tool communication module 28 establishes communication connection by connection of the communication terminal TD of the electric power tool 20 and the communication terminal BD of the battery pack 10.
The power tool 20 also includes an electronic switch 29. The electronic switch 29 is electrically connected between the tool power module 27 and the tool positive terminal T +, and specifically, one end of the electronic switch 29 is electrically connected to the tool positive terminal T + of the power tool 20, and the other end is electrically connected to the tool power module 27, for allowing the current from the battery pack 10 to flow to the tool power module 27 of the power tool 20.
The power tool 20 also includes a power-up module 30. The power-on module 30 is electrically connected to the electronic switch 29, and is used for controlling the electronic switch 29 to be turned on so as to enable the tool power module 27 to provide power for the tool communication module 28, and specifically, the power-on module 30 is electrically connected to a control terminal of the electronic switch 29. That is, the power-on module 30 is used to trigger the electronic switch 29 to be turned on, so as to enable the electrical connection between the battery pack 10 and the tool power module 27 of the power tool 20, so that the battery pack 10 supplies power to the tool power module 27 of the power tool 20, so as to enable the tool power module 27 to operate, and therefore the tool power module 27 can supply power to the tool communication module 28 and the tool control module 25.
The power-up module 30 is only operable for a short period of time, i.e., the power-up module 30 is configured to cause the power-up module 30 to briefly power the tool power module 27 during an initial stage of installation of the battery pack 10 to the power tool 20, and when the tool power module 27 is briefly powered, it is capable of outputting a voltage to briefly power the tool control module 25 and the tool communication module 28 of the power tool 20, after which the power-up module 30 is no longer operable.
In order to enable the tool power module 27 to continuously supply power to the tool control module 25 of the power tool 20, the power tool 20 further includes a power holding module 31, the power holding module 31 is electrically connected to the electronic switch 29 and the tool control module 25, and is configured to continuously control the electronic switch 29 to be turned on according to a control signal of the tool control module 25 after the power-up module 30 fails, so as to enable the tool power module 27 to continuously operate, and thus, to continuously supply power to the tool control module 25. The tool control module 25 is used to control the power retention module 31 after the power-up module 30 fails so that the power retention module 31 continues to control the electronic switch 29 to be turned on. That is, the power maintaining module 31 and the power-on module 30 are similar in function and are used for controlling the electronic switch 29 to be turned on to allow the battery pack 10 and the tool power module 27 of the power tool 20 to be electrically connected. In contrast, the power-on module 30 is only used to operate at an initial stage of the installation of the battery pack 10 to the power tool 20 to trigger the communication module to output the power display activation signal. The power maintaining module 31 controls the electronic switch 29 to be turned on according to the control signal of the tool control module 25, so that the battery pack 10 and the tool power module 27 of the power tool 20 are electrically connected, and the tool power module 27 can continuously operate, so that the tool power module 27 can continuously provide power for the tool control module 25. The power holding module 31 may be a power holding circuit.
In the present embodiment, the specific operation principle of the electronic switch 29, the power-on module 30, and the power holding module 31 is as follows: at the initial stage of installation of the battery pack 10 to the power tool 20, the power-up module 30 triggers the electronic switch 29 to turn on, and current from the battery pack 10 can flow to the tool power module 27 of the power tool 20 through the electronic switch 29, and the tool power module 27 is electrically operated, so that the battery pack 10 momentarily supplies power to the tool power module 27, and thus the tool power module 27 momentarily supplies power to the tool communication module 28 and the tool control module 25. The tool communication module 28 outputs the power display activation signal to the battery pack 10 after receiving the power of the tool power module 27, and the battery pack 10 controls the power display module 16 to display the power of the battery pack 10 after receiving the power display activation signal. In addition, the tool control module 25 is powered by the tool power module 27 for a short time, at this time, the tool control module 25 outputs a control signal to the power holding module 31, and the power holding module 31 triggers the electronic switch 361 to be continuously turned on, so that the battery pack 10 can continuously supply power to the tool power module 27, and the tool power module 27 can continuously supply power to the tool control module 25, and further the tool control module 25 of the electric tool 20 and the electric tool 20 can maintain normal operation.
Referring to fig. 5, the power-on module 30 as an embodiment specifically includes a first trigger circuit 301, where the first trigger circuit 301 is electrically connected to a control terminal of the electronic switch 29, and is configured to trigger the electronic switch 29 to be turned on to allow electrical connection between the battery pack 10 and the tool power module 27 of the power tool 20, that is, to allow the battery pack 10 to supply power to the tool power module 27 of the power tool 20.
In the present embodiment, the first trigger circuit 301 is triggered and operated by the battery pack 10. Specifically, the first trigger circuit 301 is electrically connected to the electronic switch 29 and the tool positive terminal T +, and is used for triggering the electronic switch 29 to be turned on. When the battery pack 10 is mounted to the power tool 20, the first trigger circuit 301 is triggered to operate by the positive power supply terminal B + of the battery pack 10 connected to the tool positive terminal T + of the power tool 20, and the first trigger circuit 301 operates to trigger the electronic switch 29 to be turned on to allow the battery pack 10 to supply power to the tool power module 27 of the power tool 20 for a short time.
As an embodiment, the first trigger circuit 301 includes a semiconductor switch, a first capacitor C32, and a first discharge resistor R30. The semiconductor switch is electrically connected to the electronic switch 29, and is used for controlling the electronic switch 29 to be turned on. The first capacitor C32 is electrically connected to the semiconductor switch for controlling the semiconductor switch to conduct. A first discharge resistor is connected in parallel with the first capacitor for providing a discharge path for the first capacitor C32.
In one embodiment, the semiconductor switch is a transistor Q6, the first capacitor is a capacitor C32, and the first discharge resistor is a resistor R30. One end of a capacitor C32 and a resistor R30 which are connected in parallel is electrically connected to a tool positive terminal T + of the electric tool 20 through a voltage regulator tube D12, the other end of the capacitor C32 and the resistor R30 which are connected in parallel is connected with a control end of a triode Q6 through a resistor R31, the control end of the triode Q6 is grounded through a resistor R34, an emitter of a triode Q6 is grounded, a collector of the triode Q6 is connected to a control end G of the electronic switch 29 through a voltage regulator tube D14 and a resistor R42, and is connected to a tool positive terminal T + of the electric tool 20 through a voltage regulator tube D14, a resistor R42 and a resistor R3. Alternatively, the electronic switch 29 is specifically a fet Q1, the control terminal G of the fet Q1 is electrically connected to the first trigger circuit 301, specifically to the transistor Q6 of the first trigger circuit 301, and the other two terminals of the fet Q1 are electrically connected to the tool positive terminal T + of the electric power tool 20 and the tool power module 27, respectively.
When the battery pack 10 is mounted to the power tool 20, the tool positive terminal T +, the negative connection terminal T-and the communication terminal TD of the power tool 20 are connected to the positive power terminal B +, the negative power terminal B-and the communication terminal BD of the battery pack 10, respectively. The capacitor C32 is charged, the triode Q6 is turned on, the voltage of the control terminal G of the fet Q1 is pulled low, the fet Q1 is turned on, the positive power terminal B + of the battery pack 10 is electrically connected to the tool power module 27 through the tool positive terminal T + of the electric tool 20 and the fet Q1, the battery pack 10 provides electric power to the tool power module 27, such that the tool power module 27 operates to provide power to the tool communication module 28, and the tool communication module 28, when energized, and outputting an electric quantity display activation signal to the battery pack 10, specifically, outputting the electric quantity display activation signal to the battery pack communication module 15 by the tool communication module 28, transmitting the received battery pack communication module 15 to the battery pack control module 13 by the battery pack communication module 15, and controlling the electric quantity display module 260 of the battery pack 10 according to the electric quantity display activation signal by the battery pack control module 13 to display the electric quantity of the battery pack 10.
In this way, when the battery pack 10 is mounted on the electric tool 20, the battery pack 10 can automatically display the electric quantity of the battery pack 10 without any operation, which is beneficial in that the user can avoid forgetting to trigger the electric quantity display switch of the battery pack 10 to check the electric quantity of the battery pack, thereby resulting in the wrong estimation of the service time of the battery pack 10 and preventing the battery pack 10 from being over-discharged and other adverse conditions. And the electric tool 20 does not need to be provided with an additional battery pack electric quantity or a state display module, so that the cost can be reduced, and the design is simplified.
Since the first trigger circuit 301 triggers the electronic switch 29 to be turned on by charging the capacitor C32, the capacitor C32 discharges through the resistor R30 after being fully charged, the transistor Q6 cannot be turned off due to the on-state, and the first trigger circuit 301 does not work any more, so that the electronic switch 29 cannot be turned on continuously. Thereafter, the power holding module 31 is operated so that the fet Q1 continues to be turned on, so that the electrical connection between the tool power supply module 27 and the positive power supply terminal B + of the battery pack 10 can be maintained in the on state, and the slave power tool 20 can be normally operated.
Compared with the scheme of activating the electric quantity display by inserting the battery pack to extrude the buckle structure, the embodiment only needs to add one power-on module, does not need to additionally arrange the matching structures such as the buckle and trigger the switch device on the control panel by extruding the matching structures such as the buckle, and has lower cost and simpler structure; and, compare with the wearing and tearing that bring after the scheme that relies on inserting battery package extrusion buckle structure to activate electric quantity display again a lot of plug, this embodiment relies on the electron mode to realize electric quantity display, need not to consider the wearing and tearing deformation of structure, and the reliability is higher.
Referring to fig. 6, a power-on module 40, which is another embodiment, operates by being triggered by a trigger switch SW. Alternatively, the trigger switch SW is associated with the operating mechanism 23 of the electric power tool 20 to be triggered by the operating mechanism 23. The power-up module 40 is configured to: after the battery pack 10 is mounted to the power tool 20 and the trigger switch SW is triggered, the control electronic switch 29 is turned on to cause the tool power module 27 to supply power to the tool communication module 28.
Specifically, one end of the power-on module 40 is connected to the trigger switch SW, and the other end of the power-on module 40 is electrically connected to the electronic switch 29. When the battery pack 10 is mounted on the power tool 20 and the trigger switch SW is triggered, the power-on module 40 is triggered to operate by the action of the trigger switch SW, and the power-on module 40 is activated to turn on the electronic switch 29 to allow the battery pack 10 to supply power to the tool power module 27 of the power tool 20 for a short time. Optionally, the trigger switch SW has a return spring which is turned off after being turned on briefly after being triggered.
Referring to fig. 7, the power-on module 40 includes a second trigger circuit 401, and the second trigger circuit 401 is electrically connected to the electronic switch 29 and the trigger switch SW, and is used for triggering the electronic switch 29 to be turned on. The second trigger circuit 401 includes a second capacitor and a second discharge resistor. The second capacitor is electrically connected to the electronic switch 29 and the tool positive terminal T +, and is used for controlling the electronic switch 29 to be turned on by charging the battery pack 10 connected to the tool positive terminal T +. The second discharge resistor is connected in parallel with the second capacitor for providing a discharge path for the second capacitor. The trigger switch SW is provided with a first connecting end and a second connecting end, the first connecting end of the trigger switch SW is electrically connected with the second capacitor and used for conducting a charging path of the second capacitor, and the second connecting end of the trigger switch SW is grounded.
In one embodiment, the second capacitor is a capacitor C19, and the second discharge resistor is a resistor R9. One end of the capacitor C19, which is connected in parallel with the resistor R9, is electrically connected with the control end G of the electronic switch 29 through the resistor R17, and the other end of the capacitor C19, which is connected in parallel with the resistor R9, is electrically connected with the tool positive terminal T + of the electric tool 20 through the resistor R17 and the resistor R3, and is electrically connected with one end of the trigger switch SW through the voltage regulator tube D11 and the diode D24, and the other end of the trigger switch SW is grounded. The electronic switch 29 is specifically a fet Q1, a control terminal G of the fet Q1 is connected to the second trigger circuit 401, and the other two terminals of the fet Q1 are electrically connected to the tool positive terminal T + of the electric power tool 20 and the tool power module 27, respectively.
When the battery pack 10 is mounted on the power tool 20, and when the user presses the operating mechanism 23, the trigger switch SW associated with the operating mechanism 23 is triggered to the on state, the capacitor C19 is charged, the voltage at the control terminal G of the fet Q1 is pulled low, the fet Q1 is turned on, the positive power terminal B + of the battery pack 10 is electrically connected to the tool power module 27 through the tool positive terminal T + of the power tool 20 and the fet Q1, the battery pack 10 supplies power to the tool power module 27, so that the tool power module 27 operates to supply power to the tool communication module 28, the tool communication module 28 outputs a power display activation signal to the battery pack 10 after being powered, specifically, the tool communication module 28 outputs the power display activation signal to the battery pack communication module 15, the battery pack communication module 15 transmits the received power display activation signal to the battery pack control module 13, the battery pack control module 13 controls the power display module 260 of the battery pack 10 according to the power display activation signal to display the power of the battery pack 10.
The present embodiment is different from the previous embodiment in that after the battery pack 10 is mounted to the electric power tool 20, the power of the battery pack 10 is not automatically displayed, but after the user operates the mechanism 23, the power of the battery pack is displayed, and then the tool control module 25 of the electric power tool 20 controls the motor 22 to start.
In this way, after the battery pack 10 is installed on the electric tool 20 and the operating mechanism of the electric tool is triggered, the electric quantity of the battery pack 10 is displayed firstly, and then the motor 22 is started, because the remaining electric quantity of the battery pack can be seen when the tool switch of the electric tool is pressed down at every time, the situation that a user forgets to check the electric quantity of the battery pack 10 and directly starts the motor 22 can be avoided, the service time of the battery pack 10 is estimated mistakenly, adverse conditions such as over-discharge of the battery pack 10 can be prevented, and the electric tool 10 does not need to be provided with extra battery pack electric quantity or a state display module, so that the cost can be reduced, and the design is simplified.
Referring to fig. 8 and 9, the power-on module 50 as the third embodiment has one end connected to both the trigger switch SW and the other end connected to the electronic switch 29. The power-on module 50 of the present embodiment includes both the first trigger circuit 301 and the second trigger circuit 401, which is advantageous in that the working process of the power-on module 50 can be derived through the first trigger circuit 301 and the second trigger circuit 401 of the above embodiment. This has the advantage that in the event of failure of the first trigger circuit 301, the second trigger circuit 401 provides redundancy, and the user can also use the trigger circuit 342 to indicate the charge level of the battery pack 10 after it has been mounted to the power tool 20 and after the operating mechanism of the power tool 20 has been triggered, and then activate 22, by operating the operating mechanism 23.
Through the arrangement of the first trigger circuit 301, the battery pack 10 can recognize the insertion tool and the extraction tool, and can display the power again after the next insertion.
According to the invention, by additionally arranging the power-on modules (30, 40 and 50), the electric quantity of the battery pack 10 can be automatically displayed without any operation at the initial stage of mounting the battery pack 10 on the electric tool, or after the battery pack 10 is mounted on the electric tool 20, the electric quantity of the battery pack 10 is firstly displayed after an operating mechanism of the electric tool 20 is triggered, and then the electric tool 20 is started. This is advantageous in that it is possible to prevent the user from forgetting to trigger the power display switch of the battery pack to check the power of the battery pack, which may result in a wrong estimation of the service time of the battery pack 10, and thus, it is possible to prevent the occurrence of adverse situations such as the excessive discharge of the battery pack 10. Meanwhile, the electric tool 20 does not need to be provided with an additional battery pack electric quantity or a state display module, so that the cost can be reduced, and the design can be simplified.
Compared with the mode that a display interface is additionally arranged on the tool host to display the electric quantity of the battery pack 10, the electric tool 20 does not need to be additionally provided with the display interface and the switch, so that complex designs such as wiring and the like caused by the display interface and the switch are not needed, the electric quantity display interface, the electric quantity display switch, wiring and the like are also reduced, the cost is low, and the structural design is simpler. In addition, the invention avoids the problems that the synchronism between the electric quantity display of the electric tool 20 and the electric quantity display of the battery pack 10 is poor and the reliability of the real electric quantity displayed by the electric quantity of the battery pack is low because electric quantity display components or modules are respectively arranged on the battery pack 10 and the electric tool 20 in the prior art.
As an embodiment, the analog front end afe (analog front end) and the microcontroller MCU are packaged in the form of a system chip 19 by hardware packaging.
Referring to fig. 10, as an embodiment, the battery pack 10 includes a system chip integrated with: an analog front end AFE for inputting analog quantities characterizing electrical parameters of the battery pack 10; and the microcontroller MCU is used for outputting an action signal to the electric tool 10 according to the analog quantity input by the analog front end AFE so as to enable the electric tool 10 to act according to the action signal. The analog front end AFE is connected with the microcontroller MCU. The system chip comprises a pin for connecting external equipment, wherein the pin comprises an analog input end, a power supply end, a control end and a communication end.
The analog input end is connected to the analog front end AFE, and is configured to input an analog quantity, and specifically, the analog input end can input an analog quantity representing an electrical parameter of the electric core 121 and/or the electric core pack 12.
The power supply end is connected to the microcontroller MCU and is connectable to the battery pack power module 14 of the battery pack 10 such that the battery pack power module 14 supplies power to the microcontroller MCU.
The control terminal is connected to the microcontroller MCU and can be connected to other electronic components in the battery pack 10 so that the control signal output from the MCU controls the electronic components, for example, the control terminal can be electrically connected to the control terminal of the electronic switch 17 so that the microcontroller MCU can control the on/off state of the electronic switch 17.
The communication terminal is electrically connected with the microcontroller MCU, and the communication terminal can be electrically connected with an external communication circuit or a communication module so that the microcontroller MCU of the battery pack can communicate with external equipment.
In this way, the battery management related detection information from the analog front end AFE, such as temperature, voltage, current, peak current, etc., is all enclosed in the battery pack 10 for monitoring and processing, the battery pack 10 gives a specific operation state to the electric tool 20, and the electric tool 20 performs related operations in the battery management direction completely according to the operation state given by the battery pack 10.
As another embodiment, the analog front end AFE and the microcontroller MCU are not packaged in the hardware form of the system chip, but all the battery management related information, such as temperature, voltage, current, peak current, etc., are enclosed in the battery pack in the form of software, when the battery pack is mounted to the power tool, the battery pack 10 gives a specific action state to the power tool 20 according to the battery management related information, and the power tool 20 performs the related operation in the battery management direction exactly according to the action state given by the battery pack.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by using equivalent alternatives or equivalent variations fall within the scope of the present invention.
Claims (10)
1. In combination with a power tool, a battery pack detachably mountable to the power tool for supplying electric power to the power tool,
the electric tool includes:
the tool communication module is used for outputting an electric quantity display activation signal;
a tool power module for providing electrical power to the tool communication module;
the tool communication module is configured to: after receiving the electric energy of the tool power supply module, outputting the electric quantity display activation signal to the battery pack;
the battery pack includes:
the battery pack communication module is used for establishing communication connection with the tool communication module so as to transmit the electric quantity display activation signal;
the electric quantity display module is used for displaying the electric quantity of the battery pack;
a battery pack control module configured to:
receiving the electric quantity display activation signal transmitted by the battery pack communication module;
and after the electric quantity display activation signal transmitted by the battery pack communication module is received, controlling the electric quantity display module to display the electric quantity of the battery pack.
2. The battery pack and power tool combination of claim 1,
the electric tool includes:
the tool positive terminal is used for connecting the positive power supply terminal of the battery pack;
a tool negative terminal for connection to a negative power terminal of a battery pack;
the electronic switch is electrically connected between the tool power supply module and the tool positive terminal;
and the power-on module is electrically connected with the electronic switch and is used for controlling the electronic switch to be conducted so as to enable the tool power supply module to provide electric energy for the tool communication module.
3. The battery pack and power tool combination of claim 2,
further comprising:
the power supply maintaining module is electrically connected with the electronic switch and the control module;
and the tool control module is used for controlling the power supply maintaining module after the power-on module fails so as to enable the power supply maintaining module to continuously control the electronic switch to be conducted.
4. The battery pack and power tool combination of claim 2,
the power-up module is also electrically connected with the positive terminal of the tool,
the power-up module comprises:
the first trigger circuit is electrically connected with the electronic switch and the positive terminal of the tool and used for triggering the electronic switch to be conducted;
the first trigger circuit includes:
the semiconductor switch is electrically connected with the electronic switch and is used for controlling the electronic switch to be conducted;
the first capacitor is electrically connected with the semiconductor switch and used for controlling the semiconductor switch to be conducted; the first capacitor is electrically connected to the tool positive terminal for charging by the battery pack connected to the tool positive terminal;
a first discharge resistor connected in parallel with the first capacitor for providing a discharge path for the first capacitor.
5. The battery pack and power tool combination of claim 2,
the electric tool includes:
a motor for driving the tool attachment;
an operating mechanism operable to start the motor;
a trigger switch connected in association with the operating mechanism to be triggered by the operating mechanism;
the power-up module is further electrically connected with the trigger switch, and is configured to: after the battery pack is installed on the electric tool and the trigger switch is triggered, the electronic switch is controlled to be conducted so that the tool power supply module provides electric energy for the tool communication module.
6. The battery pack and power tool combination of claim 5,
the power-on module is also electrically connected with the trigger switch,
the power-up module comprises:
the second trigger circuit is electrically connected with the electronic switch and the trigger switch and is used for triggering the electronic switch to be conducted;
the second trigger circuit includes:
a second capacitor electrically connected to the electronic switch and the tool positive terminal;
a second discharge resistor connected in parallel with the second capacitor for providing a discharge path for the second capacitor;
the trigger switch is provided with a first connecting end and a second connecting end, the first connecting end of the trigger switch is electrically connected with the second capacitor and used for conducting a charging path of the second capacitor, and the second connecting end of the trigger switch is grounded.
7. The battery pack and power tool combination of claim 1,
the battery pack includes:
the detection module is used for detecting the electrical parameters of the battery pack;
the battery pack control module is configured to:
and outputting an action signal to the electric tool according to the electrical parameter of the battery pack detected by the detection module so that the electric tool acts according to the action signal.
8. The battery pack and power tool combination of claim 1,
the battery package system chip, the system chip integration has:
an analog front end for inputting analog quantities characterizing electrical parameters of the battery pack;
and the microcontroller is used for outputting an action signal to the electric tool according to the analog quantity input by the analog front end so as to enable the electric tool to act according to the action signal.
9. The battery pack and power tool combination of claim 1,
the tool communication module comprises a tool wireless communication module, and the battery pack communication module comprises a battery pack wireless communication module;
the tool wireless communication module is used for establishing wireless communication connection with the battery pack communication module so as to transmit the electric quantity display activation signal to the battery pack.
10. The battery pack and power tool combination of claim 1,
the tool communication module comprises a tool communication terminal and the battery pack communication module comprises a battery pack communication terminal;
the tool communication terminal is used for being connected with the battery pack communication terminal so as to transmit the electric quantity display activation signal to the battery pack.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910015000 | 2019-01-08 | ||
| CN2019100150001 | 2019-01-08 |
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| CN202010019623.9A Pending CN111409044A (en) | 2019-01-08 | 2020-01-08 | Combination of battery pack and electric tool |
| CN202010019173.3A Pending CN111416077A (en) | 2019-01-08 | 2020-01-08 | Battery pack |
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| CN115528757A (en) * | 2021-06-24 | 2022-12-27 | 南京泉峰科技有限公司 | Electric tool |
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| CN114335863A (en) * | 2020-09-30 | 2022-04-12 | 南京泉峰科技有限公司 | Battery pack |
| CN114335853A (en) * | 2020-09-30 | 2022-04-12 | 南京泉峰科技有限公司 | Battery pack |
| WO2022068690A1 (en) | 2020-09-30 | 2022-04-07 | 南京德朔实业有限公司 | Battery pack, electric tool system, and charging system |
| CN114361674A (en) * | 2020-09-30 | 2022-04-15 | 南京泉峰科技有限公司 | Battery pack |
| CN114551926B (en) * | 2020-11-25 | 2024-03-26 | 浙江臻泰能源科技有限公司 | High-temperature fuel cell stack |
| WO2022121142A1 (en) * | 2020-12-11 | 2022-06-16 | 深圳市格瑞普电池有限公司 | Vehicle-mounted emergency power supply |
| CN115020871A (en) * | 2021-08-26 | 2022-09-06 | 江苏东成工具科技有限公司 | Battery pack |
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