An adaptor device and tool system

Abstract

The application discloses an adapter device and a tool system, the adapter device comprises: a shell, the shell forms a containing cavity for accommodating a circuit board; an input part is arranged on one side of the shell, the input part is used for being combined with a battery pack, the input part is provided with an input interface for being connected with an output terminal on the battery pack; an output part is arranged on the other side of the shell, the output part is used for being combined with a power tool, the output part is provided with a type-C output interface; the input interface and the type-C output interface are electrically connected through the circuit board. According to the needs of the power tool, the battery pack outputs the voltage required by the power tool through the adapter device and the tool system.

Description

Technical Field

[0001] This invention belongs to the field of charging and discharging technology, and specifically relates to an adapter device and tool system. Background Technology

[0002] Generally, different power tools have different rated operating voltages, such as handheld blow dryers and handheld drills. Therefore, manufacturers need to provide corresponding battery packs for each power tool. When users have multiple power tools, they must carry multiple battery packs of different specifications, and each power tool requires a dedicated battery pack. This can be confusing for users. When battery packs are similar in shape and have similar ports, it's easy to mix them up with the corresponding power tools, causing overvoltage and malfunction. Furthermore, if the battery pack's interface is incompatible with the power tool's interface, the battery pack cannot provide power to the power tool. Summary of the Invention

[0003] The purpose of this invention is to provide an adapter and tool system, through which the adapter and tool system provided by this invention realizes that the battery pack outputs the voltage required by the power tool according to the voltage requirements of the power tool.

[0004] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0005] The present invention provides an adapter device comprising:

[0006] An adapter, characterized in that it comprises:

[0007] A housing that forms a receiving cavity for housing a circuit board;

[0008] An input section is provided on one side of the housing. The input section is used to connect with the battery pack and has an input interface for connecting to the output terminal on the battery pack.

[0009] An output section is provided on the other side of the housing. The output section is used to connect with a power tool and is provided with a type-C output interface.

[0010] The input interface and the type-C output interface are electrically connected via a circuit board.

[0011] In one embodiment of the present invention, the housing includes a first housing and a second housing, which are fastened together to form the receiving cavity.

[0012] In one embodiment of the present invention, a first protrusion is provided on the first housing and is located on one side of the first housing relative to the second housing. On both sides opposite to the first protrusion, the top surface of the first protrusion extends out as a sidewall to form a first guide rail.

[0013] In one embodiment of the present invention, a first through hole is provided on the side wall of the first protrusion, and the first through hole is at a first distance from the top surface of the first protrusion.

[0014] In one embodiment of the present invention, the output interface extends into the first through hole.

[0015] In one embodiment of the present invention, the first housing is further provided with a button, the button is disposed on the surface of the first housing and located on the side of the first protrusion opposite to the first through hole, the button extends into the receiving cavity and is electrically connected to the circuit board.

[0016] In one embodiment of the present invention, the circuit board is fixed on the second housing, and when the first housing and the second housing are engaged, the circuit board is located in the receiving cavity.

[0017] In one embodiment of the present invention, the first housing has a first recess, the second housing has a second recess, the first housing is fastened to the second housing, the first recess forms the receiving cavity, and the second recess is located on the side away from the first housing.

[0018] In one embodiment of the present invention, the second housing is provided with a plurality of second through holes, and the input interface passes through the second through holes to the second recess.

[0019] In one embodiment of the present invention, a second guide rail is provided on two opposite sidewalls of the second recess.

[0020] The present invention also provides a tool system, comprising:

[0021] The battery pack is provided with output terminals;

[0022] A power tool, wherein the power tool is provided with a type-C input interface;

[0023] An adapter for connecting a battery pack and a power tool, the adapter comprising:

[0024] A housing that forms a receiving cavity for housing a circuit board;

[0025] An input section is provided on one side of the housing. The input section is used to connect with the battery and has an input interface for connecting to the output terminal on the battery pack.

[0026] An output section is provided on the other side of the housing. The output section is used to connect with the power tool and is provided with a Type-C output interface.

[0027] The input interface and the Type-C output interface are electrically connected via a circuit board;

[0028] The Type-C input interface and the Type-C output interface can be mechanically and electrically connected to provide power from the battery pack to the power tool.

[0029] The present invention also provides a tool system, comprising:

[0030] The battery pack is provided with output terminals;

[0031] A first power tool, the first power tool having a first rated voltage, and the first power tool being provided with a first type-C input interface;

[0032] A second power tool, the second power tool having a second rated voltage, the second power tool being provided with a second type-C input interface.

[0033] An adapter for connecting the battery pack and the power tool, the adapter comprising:

[0034] A housing that forms a receiving cavity for housing a circuit board;

[0035] An input section is provided on one side of the housing. The input section is used to connect with the battery pack. The input section is provided with an input interface for connecting to the output terminal on the battery pack.

[0036] An output section is provided on the other side of the housing. The output section is used to connect with the first power tool or the second power tool. The output section is provided with a Type-C output interface.

[0037] The input interface and the Type-C output interface are electrically connected via a circuit board;

[0038] The first type-C input interface or the second type-C input interface can be mechanically and electrically connected to the type-C output interface to provide the power output from the battery pack to the first power tool or the second power tool;

[0039] When the battery pack is connected to the first power tool via the adapter, the first power tool operates at a first rated voltage.

[0040] When the battery pack is connected to the second power tool via the adapter, the second power tool operates at the second rated voltage.

[0041] As described above, using the adapter and tool system of the present invention, the output voltage of the battery pack is converted into the input voltage of the power tool according to the voltage requirements of the power tool; the power tool and the adapter are engaged together by providing a first guide rail on a first housing; and the battery pack and the adapter are engaged together by providing a second guide rail on a second housing. With the adapter and tool system provided by the present invention, the same battery pack can power multiple power tools.

[0042] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0043] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a diagram illustrating an application scenario for an adapter device.

[0045] Figure 2 This is a three-dimensional structural diagram of an adapter device.

[0046] Figure 3 This is a structural diagram of a battery pack.

[0047] Figure 4 This is a three-dimensional structural diagram of the outer shell.

[0048] Figure 5 This is an exploded view of the outer shell.

[0049] Figure 6 This is a diagram of the first shell structure.

[0050] Figure 7 This is a structural diagram of the first structure side of the first shell.

[0051] Figure 8 This is a structural diagram of one side of the second shell.

[0052] Figure 9 This is a structural diagram of the other side of the second housing.

[0053] Figure 10 This is a block diagram of a battery pack control system.

[0054] Figure 11 This is a block diagram of a power tool control system.

[0055] Figure 12 This is a block diagram of a charging conversion control system.

[0056] Figure 13 This is a flowchart of the battery pack discharge process.

[0057] Figure 14 This is a flowchart of the power tool discharge process.

[0058] Figure 15 A flowchart for voltage conversion of the adapter device. Detailed Implementation

[0059] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0060] Generally, a battery pack has a voltage output terminal, and a power tool has a voltage input terminal. The voltage output terminal of the battery pack is electrically connected to the voltage input terminal of the power tool to provide power for the normal operation of the power tool. In this case, the output voltage of the battery pack matches the input voltage of the power tool to achieve normal operation; or the output voltage of the battery pack does not exceed the maximum withstand voltage of the power tool. In this case, the power tool can work, but it cannot reach its optimal working state. That is, each power tool needs to be equipped with a corresponding battery pack to achieve the optimal working state of the power tool. Since there are many handheld power tools, multiple battery packs are required. In this application, an adapter device is provided that can convert the output voltage of the battery pack into the input voltage required by the power tool according to the input voltage requirements of the power tool. Moreover, when the voltage output terminal of the battery pack and the voltage input terminal of the power tool are different types of terminals, the connection between the battery pack and the power tool is achieved by setting an interface on the adapter device that is compatible with the battery pack and the power tool.

[0061] Please see Figures 1 to 4As shown, the tool system provided by the present invention includes a power tool 30, an adapter 40, and a battery pack 100. The base 33 of the power tool 30 is connected to the adapter 40. A battery connector 331 is provided on the side of the base 33 connected to the adapter 40. The opening of the battery connector 331 is located on one side of the base 33, near the working end of the power tool 30. A limiting groove 333 is also provided on the base 33 with the opening to limit the position of the adapter 40. Guide grooves 332, for example, L-shaped grooves, are provided on the two sidewalls adjacent to the opening of the battery connector 331 for better engagement with the adapter 40. A Type-C port 34 is provided on the sidewall opposite to the opening of the battery connector 331. The Type-C port 34 is electrically connected to the first interface 408 of the adapter 40, serving as the Type-C input interface of the power tool 30.

[0062] Please see Figures 1 to 3 As shown, the present invention provides a battery pack 100. A connector 1101 is provided on the top surface of the battery pack housing 10, and slide rails 1102 are provided on both sides of the connector 1101. The slide rails 1102 are used for connection with an adapter 40. Specifically, as shown... Figure 3 As shown, the battery pack housing 10 includes an upper housing 11 and a lower housing 12, which are fixedly connected. A circuit board is housed within a receiving space formed by assembling the upper housing 11 and the lower housing 12. A plug-in portion 1101 is provided on the top surface of the upper housing 11. Slide rails 1102 are provided on both sides of the plug-in portion 1101, and a terminal 132 is located at one end of the plug-in portion 1101, between the slide rails 1102 on both sides of the plug-in portion 1101. When the adapter 40 is connected to the battery pack 100 via the second guide rail 419, the terminal 132 is electrically connected to the voltage input terminal of the adapter 40, serving as an output terminal. A limiting member 111 is also provided on the upper housing 11 of the battery pack housing 10. The limiting member 111 is installed on the side of the upper housing 11 away from the terminal 132, and serves to lock the battery pack 100 when it is connected to the adapter 40, preventing the battery pack 100 from falling off the tool. Specifically, the limiting member 111 includes a limiting pressing part 1111 and a limiting post 1112. The limiting pressing part 1111 is used by the operator to release the latch between the battery pack 100 and the adapter 40. The limiting post 1112 is used to achieve a fixed connection between the limiting member 111 and the external tool.

[0063] Please see Figure 1 and Figure 5As shown, an adapter 40 provided by the present invention is disposed between a battery pack 100 and a power tool 30, for converting the output voltage of the battery pack 100 into the input voltage required by the power tool 30. The adapter 40 provided by the present invention includes a housing 41 and a circuit board 402. The housing 41 includes a first housing 401 and a second housing 403, both of which have a recess. During installation, the first housing 401 is fastened onto the second housing 403 to form a receiving cavity, which is formed by the recess of the first housing 401. A circuit board 402 is installed within the receiving cavity formed by the first housing 401, while the recess of the second housing 403 is used to engage with the battery pack 100.

[0064] Please see Figure 1 , Figures 4 to 7 As shown, in one embodiment of the present invention, the side of the first housing 401 connected to the power tool 30 is the output section of the adapter. The output section includes a first guide rail 405 that engages with the power tool 30, and a first interface 408 that is electrically connected to the Type-C port 34. Specifically, a first protrusion 404 is provided on the first housing 401, and a sidewall extends from the top surface of the first protrusion 404 to form the first guide rail 405. Two first guide rails 405 are arranged parallel to each other. The battery connector 331 of the power tool 30 is allowed to engage with the first protrusion 404, and the guide groove 332 is allowed to engage with the first guide rail 405.

[0065] Please see Figures 4 to 7 As shown, in one embodiment of the present invention, a first through hole 407 is further provided on the side wall of the first protrusion 404. The first through hole 407 is set at a first distance D1 from the top surface of the first protrusion 404, which is adapted to the distance from the Type-C port 34 on the base 33 of the power tool 30 to the bottom wall of the battery connector 331, that is, the first distance D1 is equal to the distance from the Type-C port 34 to the bottom wall of the battery connector 331. A first interface 408 is disposed in the first recess 411 of the first housing 401, and the first interface 408 extends into the first through hole 407. The first interface 408 is electrically connected to the output end of the circuit board 402 and is the output interface of the adapter device. The first interface 408 is, for example, a Type-C output interface. When the power tool 30 is engaged with the adapter device 40, the battery connector 331 is engaged with the first protrusion 404, the guide groove 332 is engaged with the first guide rail 405, and the Type-C port 34 is engaged with and electrically connected to the first interface 408.

[0066] Please see Figures 4 to 8As shown, in one embodiment of the present invention, a button 409 is provided on one side of the first protrusion 404 and on the surface of the first housing 401. The button 409 extends into the first recess 411 and can serve as a push-button switch for the circuit board 402. Multiple locking posts 412 are provided inside the first recess 411 and on its outer side. These posts connect to locking points 417 on the second recess 418 of the second housing 403, and are used to position and connect the first housing 401 and the second housing 403. The locking posts 412 are hollow cylinders, and the locking points 417 are also hollow cylinders. The outer diameter of the locking post 412 is equal to the inner diameter of the hollow cylinder on the locking point 417, and the locking post 412 engages with the locking point 417. Multiple second slots 413 are also provided on the side wall of the first recess 411, which engage with the clips 416 on the second housing 403 to fix the first housing 401 and the second housing 403. Multiple support plates 410 are also provided on the outer side of the first recess 411 to reinforce the first housing 401.

[0067] Please see Figure 4 As shown, in one embodiment of the present invention, a [missing information] can also be provided on the first housing 401 and the first protrusion 404. Figure 3 The limiting member 111 shown serves to lock the first housing 401 and the power tool 30 together, and its implementation is similar to... Figure 3 Same as shown.

[0068] Please see Figures 4 to 8 As shown, in one embodiment of the present invention, the second housing 403 has multiple locking points 417 on the side connected to the first housing 401, which engage with locking posts 413 on the first housing 401. Furthermore, on the side where the second housing 403 connects to the first housing 401, multiple locking members 416 are also provided, their positions corresponding to the second locking slots 413. When the first housing 401 and the second housing 403 are engaged, the locking members 416 engage with the second locking slots 413. The circuit board 402 is fixed to the side where the second housing 403 connects to the first housing 401. When the first housing 401 and the second housing 403 are engaged, the circuit board 402 is located within the first recess 411. Multiple second interfaces 414 are connected to the input end of the circuit board 402, and the second interfaces 414 and the first interface 408 are located on the same side of the housing 41. One end of the second interface 414 is electrically connected to the input end of the circuit board 402, which is the input interface of the adapter 40. The other end passes through the second through hole 415 on the second housing 403 to the second recess 418. When the second housing 403 is engaged on the battery pack 100, the second interface 414 is also electrically connected to the terminal 132 of the battery pack 100.

[0069] Please see Figures 1 to 9As shown, in one embodiment of the present invention, on the side opposite to the first housing 401 where the second housing 403 is connected, i.e., the side where the second housing 403 is connected to the battery pack 100, an input portion of the adapter 40 is provided. The input portion includes a second interface 414 electrically connected to the terminal 132, and a second guide rail 419 engaging with the slide rail 1102. Specifically, a second recess 418 is provided on the second housing 403, the second recess 418 being a recess with an opening. Second guide rails 419 are provided on two opposite sidewalls of the second recess 418, i.e., the second guide rails 419 are provided on the sidewalls adjacent to the opening. The two second guide rails 419 are arranged in parallel for engaging with the slide rail 1102 of the battery pack 100. Furthermore, on the side of the opening, a limiting groove 421 is provided on the bottom wall of the second recess 418. The limiting groove 421 is adapted to the shape of the limiting post 1112 on the battery pack 100. When the second recess 418 of the second housing 403 is engaged with the plug-in portion 1101 of the battery pack 100, the limiting post 1112 is engaged in the limiting groove 421.

[0070] Please see Figures 1 to 9 As shown, when the adapter 40 connects the power tool 30 and the battery pack 100, the first guide rail 405 on the first housing 401 engages with the guide groove 332 of the power tool 30, and the first interface 408 is electrically connected to the Type-C port 34; the second guide rail 419 on the second housing 403 engages with the slide rail 1102 on the battery pack 100, and the second interface 414 is electrically connected to the terminal 132 of the battery pack 100. The circuit board 402 disposed within the receiving cavity formed by the first recess 411 of the first housing 401 converts the output voltage of the battery pack 100 into the input voltage required by the power tool 30. This application does not limit the rated voltage of the power tool 30. For example, if the first power tool has a first rated voltage and the Type-C port 34 is a first Type-C input interface, then the first interface 408 is electrically connected to the first Type-C input interface to convert the output voltage of the battery pack 100 into the first rated voltage, and the first power tool operates at the first rated voltage. If the second power tool has a second rated voltage and the Type-C port 34 is a second Type-C input interface, then the first interface 408 is electrically connected to the second Type-C input interface to convert the output voltage of the battery pack 100 into the second rated voltage, and the second power tool operates at the second rated voltage.

[0071] Please see Figure 10As shown, in one embodiment of the present invention, the control system of the battery pack 100 includes: a cell group 120 (lithium battery), a main control unit 181, a detection unit 171 and an activation unit 110 electrically connected to the main control unit 181, a COM communication processing unit 191 electrically connected to the main control unit 181 and the activation unit 110, a DC-DC unit 130 electrically connected to the cell group 120 and the main control unit 181, a first charge-discharge protection unit 151 electrically connected to the cell group 120, the main control unit 181 and the DC-DC unit 130, and terminals 132, wherein terminals 132 include four terminals: P+, CHG, COM and P-, and P+ and CHG are connected to the first charge-discharge protection unit 151 and connected to the positive terminal of the battery, the COM port is connected to the COM communication processing unit, and the P- port is connected to the negative terminal of the battery.

[0072] Please see Figure 10 As shown, in this invention, the detection unit 171 is used to detect the voltage of a single cell in the battery cell assembly 120, as well as the temperature of the battery cell assembly 120, and transmits the detection results to the main control unit 181. The main control unit 181 is used to receive the data information from the detection unit 171 and the circuit charging and discharging information, and after analysis, executes the corresponding protection operation. The detection unit 171 and the main control unit communicate via I2C. The DC-DC unit 130 converts the voltage across the battery cell assembly 120 into the voltage required for the operation of the main control unit 181 and other modules. The first charging and discharging protection unit 151 receives the protection command from the main control unit 181 and completes the charging and discharging protection action of the circuit. The COM communication processing unit 191 processes the communication between the external COM communication and the main control unit 181. The activation unit 110 receives the activation signal from the outside, including the KEY signal (button) and the COM signal, and completes the power-on action of the main control unit 181. After the main control unit completes the power-on action, it communicates with the outside through the COM communication processing unit.

[0073] Please see Figure 10 and Figure 13 As shown, in this embodiment, after the battery pack 100 is connected to the adapter 40, the control method of the battery pack 100 includes the following steps: S10: The battery pack 100 is electrically connected to the adapter 40; S11: The battery pack 100 is activated; S12: The battery pack 100 and the adapter 40 communicate and handshake; S13: It is determined whether the handshake is successful. If the handshake is successful, S14 is executed: Enter the discharge mode; otherwise, return to step S12.

[0074] Please see Figure 10 and Figure 13As shown, in a specific embodiment of the present invention, the control method of the battery pack 100 specifically includes: after the battery pack 100 is electrically connected to the adapter device 40, the adapter device 40 activates the battery pack 100 through a COM signal, the battery pack 100 and the adapter device 40 perform a communication handshake, and determine whether the handshake is successful. If it is unsuccessful, it remains in the handshake mode. After the handshake is successful, the adapter device 40 sends a discharge request through a COM signal. When the battery pack 100 passes the request, the battery pack 100 enters the discharge mode. In the discharge mode, the main control unit 181 monitors the battery status in real time, including voltage, current and cell temperature. When a single cell voltage or temperature abnormality occurs, the discharge will stop. In this embodiment, the main control unit 181 may also include a power calculation module. The power calculation module calculates the battery power in real time. When the power of the battery pack 100 is a first threshold, that is, when the state of charge (SOC) = the first threshold, the discharge stops. The first threshold is, for example, 5%.

[0075] Please see Figure 11 As shown, the control system of the power tool 30 includes: a Type-C port 34, which includes VBUS, CC, D+, D- and GND ports; a second main control unit 368 electrically connected to the Type-C port 34; a second communication processing unit 366 electrically connected between the Type-C port 34 and the second main control unit 368; a discharge protection unit 367 electrically connected between the Type-C port 34 and the second main control unit 368; a power unit 37, one end of which is electrically connected to the discharge protection unit 367 and then to the D+ port; and the other end of the power unit 37 is electrically connected to the D- port.

[0076] Please see Figure 11 As shown, in this invention, the discharge protection unit 367 is used to receive the protection command from the second main control unit 368 and complete the discharge protection of the power tool 30. The second communication processing unit 366 completes the communication between the adapter 40 and the power tool 30. The second main control unit 368 processes the power-on and power-off commands provided by the second communication processing unit 366 and the discharge protection unit 367.

[0077] Please see Figure 11 and Figure 14As shown, after the power tool 30 is connected to the adapter 40, the control method of the power tool 30 includes the following steps: S30: The power tool 30 is connected to the adapter 40; S31: The power tool 30 and the adapter 40 perform a communication handshake; S32: Determine whether the handshake is successful. If the handshake is successful, then execute step S33: The power tool 30 enters the working mode; otherwise, return to step S31. Specifically, in one embodiment of the present invention, after the power tool 30 is connected to the adapter 40, and after the entire system (including the control system within the power tool 30 and the adapter 40) is activated, the power tool 30 performs a communication handshake with the adapter 40 through the Type-C port 34. If the handshake is unsuccessful, it remains in the handshake mode. After the handshake is successful, the second main control unit 368 activates the discharge protection unit 367 and issues a discharge request. After the request is approved, the power tool 30 enters the working mode.

[0078] Please see Figure 12 As shown, the present invention provides a charging conversion control system 42 disposed between the battery pack 100 and the control system of the power tool 30. The charging conversion control system 42 mainly includes: a third communication processing unit 433 electrically connected to the second interface 414; a third main control unit 434 electrically connected to the third communication processing unit 433; a full-bridge drive unit 437 electrically connected to the third main control unit 434; a full-bridge power unit 436 electrically connected to the second interface 414 and the full-bridge drive unit 437; and a fourth communication processing unit 439 electrically connected to the third main control unit 434. The full-bridge power unit 436 and the fourth communication processing unit 439 are electrically connected to the first interface 408. When the control system of the battery pack 100 and the control system of the power tool 30 are electrically connected, the second interface 414 is electrically connected to the terminal 132 of the battery pack 100, and the first interface 408 is electrically connected to the Type-C port 34 of the power tool 30.

[0079] Please see Figure 12As shown, the second interface 414 in this invention is the input interface of the charging conversion control system 42, which is electrically connected to the terminal 132 of the battery pack 100. Corresponding to the terminal 132, the second interface 414 includes four ports: P+, CHG, COM, and P-, which correspond one-to-one with the ports of the terminal 132. However, the CHG port is not used in this application and is set as an empty port. The P+ and P- ports are used to provide the output voltage of the battery pack 100, and the COM port is used for communication. The first interface 408 is the output interface of the charging conversion control system 42, which is electrically connected to the Type-C port 34 of the power tool 30. The first interface 408 includes VBUS, CC, D+, D-, and GND ports, which correspond one-to-one with the ports of the Type-C port 34. Among them, the D+ and D- ports are used to output the output voltage of the charging conversion control system 42, the CC port is used for communication between the charging conversion control system 42 and the power tool 30, the GND port is the ground terminal, and the VBUS outputs a constant voltage to power the various modules in the power tool 30. VBUS is, for example, the commonly used 5V voltage.

[0080] For further details, please refer to Figure 12 As shown, the third communication processing unit 433 is electrically connected to the COM port of the second interface 414 and the third main control unit 434 to realize communication between the battery pack 100 and the adapter device 40. In this embodiment, the third communication processing unit 433 is a COM communication processing unit, matching the COM communication of the battery pack 100. The third main control unit 434 receives signals from each module and issues operation commands. One end of the fourth communication processing unit 439 is electrically connected to the third main control unit 434, and the other end is electrically connected to the first interface 408 to realize communication between the power tool 30 and the adapter device 40. In this embodiment, the fourth communication processing unit 439 is a Type-C communication processing unit, matching the Type-C communication of the power tool 30.

[0081] For further details, please refer to Figure 12As shown, the full-bridge drive unit 437 is electrically connected to the third main control unit 434, and the full-bridge power unit 436 is electrically connected to the second interface 414 and the full-bridge drive unit 437. The full-bridge drive unit 437 and the full-bridge power unit 436 form a boost / buck module. The input voltage information can be obtained through communication between the third communication processing unit 433 and the battery pack 100, and the required output voltage information can be obtained through communication between the fourth communication processing unit 439 and the power tool 30. The third main control unit 434 determines the duty cycle of the output PWM signal based on the input voltage and the required output voltage. Based on the PWM signal issued by the third main control unit 434, the full-bridge drive unit 437 and the full-bridge power unit 436 convert the voltage input from the battery pack 100 through the second interface 414 into the voltage required by the power tool 30, which is then output through the first interface 408.

[0082] Please see Figure 12 As shown, the charging conversion control system 42 of the present invention also includes a DC-DC converter unit 430, whose input terminal is electrically connected to the second interface 414. Specifically, the input terminal of the DC-DC converter unit 430 is electrically connected to the P+ port, and the output terminal is electrically connected to the third main control unit 434 and each module. The DC-DC converter unit 430 converts the input voltage of the second interface 414 into the working voltage required for the operation of each module, such as 5V.

[0083] Please see Figure 12 As shown, the charging conversion control system 42 of the present invention also includes a button activation unit 431. The button activation unit 431 is a trigger unit connected to a button 409 on the first housing 401. When it is necessary to turn on the charging conversion control system 42, the button 409 is pressed to trigger the button activation unit 431, thereby activating the third main control unit 434 electrically connected to the button activation unit 431, and thus activating the charging conversion control system 42. When the button 409 is pressed again, the third main control unit 434 can be turned off through the button activation unit 431, thereby turning off the charging conversion control system 42.

[0084] Please see Figure 12As shown, the charging conversion control system 42 of this invention also includes a total voltage detection unit 432. One end of the total voltage detection unit 432 is electrically connected to the second interface 414, specifically, one end of the total voltage detection unit 432 is electrically connected to the P+ port, and the other end of the total voltage detection unit 432 is electrically connected to the third main control unit 434. Before voltage conversion, the total voltage detection unit 432 detects the output voltage of the battery pack 100. Within the total voltage detection unit 432, the threshold value of the output voltage of the battery pack 100 is used as the second threshold value, and it is determined that the output voltage of the battery pack 100 is within the second threshold value. The determination result is transmitted to the third main control unit 434. When the output voltage of the battery pack 100 is within the second threshold value, voltage conversion can be performed; when the output voltage of the battery pack 100 exceeds the second threshold value, voltage conversion is prohibited. The total voltage detection unit 432 can prevent the battery pack 100 from over-discharging and the charging conversion control system 42 from being burned out.

[0085] Please see Figure 12 As shown, the charging conversion control system 42 of this invention also includes a current sampling unit 440. The current sampling unit 440 is electrically connected between the second interface 414 and the first interface 408, connected in series in the circuit of the charging conversion control system 42, and electrically connected to the third main control unit 434. Specifically, one end of the current sampling unit 440 is electrically connected to the P-port, the other end is electrically connected to the D-port, and also electrically connected to the third main control unit 434. The current sampling unit 440 is used to detect the current in the circuit and transmit the current information in the circuit to the third main control unit 434. When the current in the circuit is abnormal, the voltage conversion process can be terminated.

[0086] Please see Figure 12 As shown, the charging conversion control system 42 of this invention also includes a switching unit 435. The switching unit 435 is electrically connected between the second interface 414 and the first interface 408, and simultaneously electrically connected to the third main control unit 434. Specifically, one end of the switching unit 435 is electrically connected to the P+ port, and the other end is electrically connected to the input terminal of the full-bridge power unit 436, and also electrically connected to the third main control unit 434. When the third main control unit 434 issues a turn-on command, the switching unit 435 is turned on, the full-bridge power unit 436 has an input voltage, and the charging conversion control system 42 can realize the voltage conversion function. When the third main control unit 434 issues a turn-off command, the switching unit 435 is turned off, the full-bridge power unit 436 does not have an input voltage, and the charging conversion control system 42 cannot realize the voltage conversion function. In this application, the switching unit 435 is turned off when there are abnormalities such as over / under voltage, abnormal current, or abnormal charging / discharging.

[0087] Please see Figure 12As shown, the charging conversion control system 42 of this invention further includes a second charging and discharging protection unit 438. The second charging and discharging protection unit 438 is connected between the first interface 408 and the full-bridge power unit 436, and is electrically connected to the third main control unit 434. It receives protection commands from the third main control unit 434 to complete the charging and discharging protection of the circuit. In this embodiment, the second charging and discharging protection unit 438 is a Type-C charging and discharging protection unit.

[0088] Please see Figure 15 As shown, in one embodiment of the present invention, the charging conversion method provided by the present invention specifically includes:

[0089] S400: The charging conversion control system 42 is activated via button activation unit 431;

[0090] Specifically, pressing the button 409 on the first housing 401 triggers the button activation unit 431, which in turn activates the third main control unit 434 electrically connected to the button activation unit 431, thereby activating the charging conversion control system 42. In this embodiment, pressing the button 409 again can shut down the third main control unit 434 via the button activation unit 431, thereby shutting down the charging conversion control system 42.

[0091] S401: Switch unit 435 is activated via the third main control unit 434;

[0092] Specifically, the switching unit 435 is located between the second interface 414 and the first interface 408, and between the second interface 414 (input terminal) and the full-bridge power unit 436. When the switching unit 435 is disconnected, voltage conversion cannot be performed.

[0093] S402: Communication handshake is performed through the third communication processing unit 433 and the fourth communication processing unit 439;

[0094] Specifically, the third communication processing unit 433 is electrically connected to the COM port of the second interface 414 to perform COM communication handshake with the battery pack 100, and the fourth communication processing unit 439 is electrically connected to the CC port of the first interface 408 to perform CC communication handshake with the power tool 30.

[0095] S403: Determine whether the handshake was successful. If successful, proceed to step S404; otherwise, return to step S402.

[0096] S404: Entering discharge mode;

[0097] Specifically, entering the discharge mode includes the power tool 30 turning on its circuit and entering the working mode; the battery pack 100 entering the discharge mode; and the charging conversion control system 42 entering the voltage conversion mode.

[0098] S405: Total voltage detection unit 432 detects the output voltage of battery pack 100;

[0099] Specifically, the total voltage detection unit 432 is electrically connected to the P+ port of the second interface 414 and is used to detect the output voltage of the battery pack 100. The total voltage detection unit 432 is set with the input voltage threshold of the charging conversion control system 42, for example, the second threshold.

[0100] S406: Determine whether the output voltage of battery pack 100 is over / under voltage;

[0101] Specifically, the total voltage detection unit 432 determines whether the output voltage of the battery pack 100 is within the second threshold of the charging conversion control system 42. When the output voltage of the battery pack 100 is within the second threshold, step S407 is executed; otherwise, step S417 is executed to stop discharging.

[0102] S407: The third main control unit 434 sends a PWM signal;

[0103] Specifically, the full-bridge drive unit 437 and the full-bridge power unit 436 form a boost / buck module, and the third main control unit 434 controls the voltage output of the full-bridge power unit 436 by issuing a PWM signal.

[0104] S408: The full-bridge power unit 436 provides the discharge voltage;

[0105] Specifically, after the switching unit 435 is turned on and the third main control unit 434 sends a PWM signal to the boost / buck module, the full-bridge power unit 436 performs voltage conversion, converting the output voltage of the battery pack 100 into the input voltage required by the power tool 30. The discharge voltage is the output voltage of the charging conversion control system 42.

[0106] S409: The third main control unit 434 detects the input voltage, output voltage, and loop current of the charging conversion control system 42;

[0107] Specifically, during the voltage conversion process of the charging conversion control system 42, the third main control unit 434 detects information in the circuit in real time, including detecting the output voltage of the battery pack 100, i.e. the input voltage of the charging conversion control system 42, through the total voltage detection unit 432; detecting the output voltage of the charging conversion control system 42 through the second charge and discharge protection unit 438; and detecting the current of the circuit of the charging conversion control system 42 through the current sampling unit 440.

[0108] S410: Determine if there are any abnormalities in the input voltage, output voltage, and loop current of the charging conversion control system 42;

[0109] Specifically, the total voltage detection unit 432 can detect whether the output voltage of the battery pack 100 is abnormal; within the third main control unit 434, based on the voltage required by the power tool 30, the threshold values ​​for the output voltage of the charging conversion control system 42 and the loop current in the charging conversion control system 42 can be set as the third threshold value; the second charge-discharge protection unit 438 monitors the output voltage of the charging conversion control system 42 in real time and transmits it to the third main control unit 434. When the output voltage of the charging conversion control system 42 is within the third threshold value, it is considered that no abnormality has occurred; when the output voltage of the charging conversion control system 42 is not within the third threshold value, it is considered that an abnormality has occurred; the current sampling unit 440 monitors the loop current of the charging conversion control system 42 in real time. When the loop current of the charging conversion control system 42 is within the third threshold value, it is considered that no abnormality has occurred; when the loop current of the charging conversion control system 42 is not within the third threshold value, it is considered that an abnormality has occurred. When any of the above abnormalities occurs, it is considered that an abnormality has occurred. When an abnormality occurs, step S411 is executed; otherwise, step S414 is executed.

[0110] S411: The third main control unit 434 adjusts in real time;

[0111] Specifically, the third main control unit 434 changes the output voltage and loop current by adjusting the duty cycle of the PWM signal. During the adjustment process, the third main control unit 434 still monitors the input voltage, output voltage and loop current in the charging conversion control system 42 in real time.

[0112] S412: Record the number of adjustments made by the third main control unit 434. When the number of adjustments made by the third main control unit 434 reaches the set number, step S413 is executed. The set number is, for example, 5 times.

[0113] S413: Determine if there are any abnormalities in the input voltage, output voltage, and loop current of the charging conversion control system 42;

[0114] Specifically, the judgment process is the same as step S410. If the judgment result is not abnormal, step S414 is executed; otherwise, step S417 is executed, and the discharge is cut off.

[0115] S414: Normal discharge.

[0116] S415: Interacts with the battery pack 100 on the current status via the third communication processing unit 433;

[0117] Specifically, during the discharge process, the adapter 40 interacts with the battery pack 100 via the third communication processing unit 433.

[0118] S416: Determine whether the battery pack 100 has issued a power-off signal. If not, proceed to step S414; otherwise, proceed to step S417. The battery pack 100 is equipped with a power calculation module that monitors the state of charge (SOC) of the battery pack 100 in real time. When the SOC equals the first threshold, a power-off signal is issued.

[0119] S417: Discharge cutoff;

[0120] Specifically, the third main control unit 434 sends a signal to the switching unit 435 to stop the operation of the charging conversion control system 42.

[0121] In summary, please refer to Figure 15 As shown, the charging conversion method provided by the present invention mainly includes: after the adapter device 40 is connected to the battery pack 100, the charging conversion control system 42 of the adapter device 40 can be activated by the button 409 on the adapter device 40. After the charging conversion control system 42 is activated, the battery pack 100 will be activated through the COM signal and communicate with it. After the handshake is successful, the total voltage detection unit 432 detects whether the battery pack 100 is undervoltage. If it is not undervoltage, the battery pack 100 will enter the voltage conversion mode, and the charging conversion control system 42 will be activated. The voltage conversion control process is as follows: the third main control unit 434 sends a PWM signal, the full-bridge drive unit 437 provides a suitable output voltage, and the third main control unit 434 monitors the parameters in the voltage conversion process. The parameters in the voltage conversion process generally include loop current, input voltage and output voltage. The parameter range can be set as needed. When the parameters in the voltage conversion process exceed the preset parameter range, it is considered abnormal. The charging / discharging voltage and charging / discharging current can be dynamically adjusted according to the preset logic. The number of adjustments can be one or more, and the specific number can be set as needed. In this embodiment, it is 5 times. After adjustment, the parameters during the voltage conversion process are continuously monitored. If any abnormalities persist, the discharge process stops; otherwise, the voltage conversion proceeds normally. During normal discharge, the battery pack 100 and the adapter 40 exchange data in real time via communication. The battery pack 100 stops discharging when it issues a discharge cutoff signal. In this embodiment, the battery pack 100 issues a discharge cutoff signal when its state of charge (SOC) equals a first threshold value.

[0122] In summary, the adapter and tool system of the present invention can convert the output voltage of the battery pack into the input voltage required by the power tool. During the discharge process, it can detect the technical parameters of the battery pack, adapter, and power tool in real time, and execute the charging conversion method according to the technical parameters to dynamically adjust the input / output power. This can effectively protect the safety of the battery pack, adapter, and power tool, and extend the service life of the battery pack and power tool.

[0123] In the description of this specification, the references to terms such as "this embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0124] The embodiments of the present invention disclosed above are merely illustrative of the invention. The embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An adapter suitable for connecting a power tool, the adapter being disposed between a battery pack and the power tool, characterized in that, The adapter includes: The housing forms a receiving cavity for accommodating a circuit board. The housing has a first protrusion adapted to engage with the battery connector of the power tool. The housing also has a second recess adapted to engage with the battery pack. An input section is provided on one side of the housing. The input section is used to connect with the battery pack and has an input interface for connecting to the output terminal on the battery pack. An output section is disposed on the other side of the housing. The output section is used to connect with a power tool. The output section is provided with a Type-C output interface. A first through hole is provided on the side wall of the first protrusion, and the first through hole is at a first distance from the top surface of the first protrusion. The Type-C output interface extends into the first through hole. The Type-C output interface is used to connect to the Type-C input interface of the power tool when the first protrusion is engaged with the battery connector. The input interface and the type-C output interface are electrically connected via a circuit board.

2. The adapter according to claim 1, characterized in that, The housing includes a first housing and a second housing, which are fastened together to form the receiving cavity.

3. The adapter according to claim 2, characterized in that, The first housing is provided with the first protrusion, which is located on one side of the first housing relative to the second housing. On both sides opposite to the first protrusion, the top surface of the first protrusion extends into a sidewall to form a first guide rail.

4. The adapter according to claim 2, characterized in that, The first housing is also provided with a button, which is disposed on the surface of the first housing and located on the side of the first protrusion opposite to the first through hole. The button extends into the receiving cavity and is electrically connected to the circuit board.

5. The adapter according to claim 2, characterized in that, The circuit board is fixed to the second housing, and when the first housing and the second housing are engaged, the circuit board is located inside the receiving cavity.

6. The adapter according to claim 2, characterized in that, The first housing has a first recess, the second housing has a second recess, the first housing is fastened onto the second housing, the first recess forms the receiving cavity, and the second recess is located on the side away from the first housing.

7. The adapter according to claim 6, characterized in that, The second housing is provided with a plurality of second through holes, and the input interface passes through the second through holes into the second recess.

8. The adapter according to claim 7, characterized in that, A second guide rail is provided on the two opposite sidewalls of the second recess.

9. A tool system, characterized in that, include: The battery pack is provided with output terminals; A power tool, wherein the power tool is provided with a type-C input interface; An adapter for connecting a battery pack and a power tool, the adapter being disposed between the battery pack and the power tool, the adapter comprising: The housing forms a receiving cavity for accommodating a circuit board. The housing has a first protrusion adapted to engage with the battery connector of the power tool. The housing also has a second recess adapted to engage with the battery pack. An input section is provided on one side of the housing. The input section is used to connect with the battery and has an input interface for connecting to the output terminal on the battery pack. An output section is disposed on the other side of the housing. The output section is used to connect with the power tool. The output section is provided with a Type-C output interface. A first through hole is provided on the side wall of the first protrusion, and the first through hole is at a first distance from the top surface of the first protrusion. The Type-C output interface extends into the first through hole. The Type-C output interface is used to connect to the Type-C input interface of the power tool when the first protrusion is engaged with the battery connector. The input interface and the type-C output interface are electrically connected via a circuit board; The Type-C input interface and the Type-C output interface can be mechanically and electrically connected to provide power from the battery pack to the power tool.

10. A tool system, characterized in that, include: The battery pack is provided with output terminals; A first power tool, the first power tool having a first rated voltage, and the first power tool being provided with a first type-C input interface; A second power tool, the second power tool having a second rated voltage, the second power tool being provided with a second type-C input interface. An adapter for connecting the battery pack and the power tool, the adapter being disposed between the battery pack and the power tool, the adapter comprising: The housing forms a receiving cavity for accommodating a circuit board. The housing has a first protrusion adapted to engage with the battery connector of the power tool. The housing also has a second recess adapted to engage with the battery pack. An input section is provided on one side of the housing. The input section is used to connect with the battery pack. The input section is provided with an input interface for connecting to the output terminal on the battery pack. An output section is disposed on the other side of the housing. The output section is used to connect with the first power tool or the second power tool. The output section is provided with a Type-C output interface. A first through hole is provided on the side wall of the first protrusion, and the first through hole is at a first distance from the top surface of the first protrusion. The Type-C output interface extends into the first through hole. The Type-C output interface is used to connect to the Type-C input interface of the power tool when the first protrusion is engaged with the battery connector. The input interface and the type-C output interface are electrically connected via a circuit board; The first type-C input interface or the second type-C input interface can be mechanically and electrically connected to the type-C output interface to provide the power output from the battery pack to the first power tool or the second power tool; When the battery pack is connected to the first power tool via the adapter, the first power tool operates at a first rated voltage. When the battery pack is connected to the second power tool via the adapter, the second power tool operates at the second rated voltage.

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