Battery packs and power tools

Abstract

The present application provides a battery pack and an electric tool, wherein the battery pack includes a shell, a battery cell unit and a circuit board, the circuit board is provided with a battery terminal and a terminal pressurizing mechanism, the battery terminal is connected to the battery cell unit and is used to be plugged into the plug-in terminal of a docking device, the battery cell unit is used to transmit electric energy when the battery terminal and the plug-in terminal of the docking device are plugged in and electrically connected; the terminal pressurizing mechanism includes an electromagnetic induction component, an adsorption component and a pressing component, the electromagnetic induction component is connected to the battery cell unit, and is used to energize and generate magnetic attraction when the battery cell unit transmits electric energy; the adsorption component is adjacent to the electromagnetic induction component and is arranged at intervals, the pressing component is arranged on one side of the battery terminal and is located between the adsorption component and the battery terminal, the adsorption component is used to move toward the electromagnetic induction component under the action of the magnetic attraction force, and push the pressing component during the movement, and the pressing component presses the battery terminal against the plug-in terminal under the push of the adsorption component to prevent poor contact between the battery terminal and the plug-in terminal.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery pack and an electric tool. Background Art

[0002] Battery packs are often used as external power sources for docking devices such as power tools. They establish electrical connections between the battery terminals and the plug-in terminals of the docking device to transmit power to the docking device. However, during long-term and repeated plugging and unplugging, the battery terminals are prone to deformation, resulting in poor contact between the battery terminals and the plug-in terminals, causing the docking device to shut down or catch fire. Summary of the invention

[0003] In view of this, the present application provides a battery pack and an electric tool, which can prevent poor contact between the battery terminals of the battery pack and the plug terminals of the docking device, thereby avoiding the risk of power failure, shutdown or fire of the docking device.

[0004] The first aspect of the present application provides a battery pack, which includes a shell, a battery cell unit and a circuit board. The battery cell unit and the circuit board are accommodated in the shell, and the circuit board is provided with a battery terminal and a terminal pressurizing mechanism, wherein the battery terminal is connected to the battery cell unit and is also used to be plugged into the plug-in terminal of a docking device, and the battery cell unit is used to transmit electric energy when the battery terminal and the plug-in terminal of the docking device are plugged in and electrically connected; the terminal pressurizing mechanism includes an electromagnetic induction component, an adsorbent and a pressing component, the electromagnetic induction component is connected to the battery cell unit, and is used to energize and generate magnetic attraction when the battery cell unit transmits electric energy; the adsorbent is adjacent to the electromagnetic induction component and is arranged at intervals, the pressing component is arranged on one side of the battery terminal and is located between the adsorbent and the battery terminal, the adsorbent is used to move toward the electromagnetic induction component under the action of the magnetic attraction, and push the pressing component during the movement, and the pressing component presses the battery terminal against the plug-in terminal under the push of the adsorbent.

[0005] In one embodiment, the battery cell unit is used to stop transmitting electric energy when the battery terminal is not electrically connected to the plug-in terminal, and the electromagnetic induction component is used to stop generating magnetic attraction when the battery cell unit stops transmitting electric energy; the terminal pressurizing mechanism also includes an elastic member, which is arranged between the pressing member and the battery terminal, and the pressing member compresses the elastic member when moving toward the battery terminal; when the electromagnetic induction component stops generating magnetic attraction, the pressing member is used to move in a direction away from the battery terminal under the action of the elastic force of the elastic member, and push the adsorption member during the movement to make the adsorption member move away from the electromagnetic induction component.

[0006] In one embodiment, the battery terminal includes a connected mounting portion and an elastic contact portion, the mounting portion is used to connect to the circuit board, the elastic contact portion is formed with an opening, the opening is used for the plug-in terminal to be inserted, and the elastic contact portion is used to contact the plug-in terminal when the plug-in terminal is inserted into the opening; the pressing piece is used to push the elastic contact portion under the push of the adsorption piece, thereby pressing the elastic contact portion against the plug-in terminal.

[0007] In one embodiment, the adsorption part includes a base, an abutment part and an adsorption part, the abutment part is bent and extended from the first end of the base, and the abutment part is used to abut the pressing part under the action of magnetic attraction; the adsorption part is bent and extended from the second end of the base, and is arranged opposite to the electromagnetic induction component, and the magnetic attraction of the electromagnetic induction component acts on the adsorption part.

[0008] In one embodiment, the abutting portion is provided with a first guiding slope, the pressing piece is provided with a second guiding slope, the first guiding slope and the second guiding slope are parallel to each other, and the abutting portion is used to abut the second guiding slope of the pressing piece through the first guiding slope.

[0009] In one embodiment, the pressing part is provided with a main body, a pushing part and a limiting part. The main body is in contact with the adsorption part. The pushing part is extended from the main body toward the direction of the battery terminal, and is used to push the battery terminal under the push of the adsorption part; the limiting part is protruded from the main body toward the direction of the battery terminal, and is used to assemble the elastic part and limit the elastic part.

[0010] In one embodiment, the shell includes a main body and a plug-in portion protruding from the main body, the main body is used to accommodate the battery cell unit and the circuit board, and the circuit board is placed on a side of the battery cell unit close to the plug-in portion; the plug-in portion is used for docking the docking device, and a plug-in slot and an installation slot are provided inside the plug-in portion, the plug-in slot is connected to the external environment, the plug-in slot is used to accommodate the battery terminal and for the plug-in terminal to be inserted; the installation slot is adjacent to and connected to the plug-in slot, the installation slot is used to accommodate the terminal pressurizing mechanism, and the pressing piece is used to enter the plug-in slot under the push of the adsorption piece to push the battery terminal.

[0011] In one embodiment, the battery terminal includes a positive terminal and a negative terminal, the positive terminal is connected to the positive pole of the battery cell unit, and is also used to be plugged into the positive plug terminal of the docking device; the negative terminal is connected to the negative pole of the battery cell unit, and is also used to be plugged into the negative plug terminal of the docking device; accordingly, the number of terminal pressurizing mechanisms is at least two, and at least two terminal pressurizing mechanisms correspond one-to-one to the positive terminal and the negative terminal.

[0012] A second aspect of the present application provides an electric tool that is detachably connected to a battery pack, the electric tool comprising a housing, a motor, a control circuit and a plug-in terminal, the motor and the control circuit are both housed in the housing, the plug-in terminal is exposed from the housing, the control circuit is used to connect to the battery pack via the plug-in terminal to obtain power, wherein the battery pack is the battery pack described in the first aspect or any one of the embodiments of the first aspect, the control circuit is also connected to the motor, and is used to control the operation of the motor when obtaining power.

[0013] In one embodiment, the electric tool also includes a key switch connected to the control circuit. When the plug terminal and the battery terminal are plugged in and the key switch is pressed, the battery unit transmits electrical energy to the control circuit through the battery terminal and the plug terminal; when the key switch pops up, the battery unit stops transmitting electrical energy to the control circuit.

[0014] Compared with the prior art, this application has at least the following advantages:

[0015] The battery pack of the present application is provided with a terminal pressurizing mechanism, which can press the battery terminal against the plug terminal when the battery terminal of the battery pack is plugged and electrically connected with the plug terminal of the docking device, so that the battery terminal and the plug terminal are stably electrically connected, thereby preventing the power tool from being powered off and shutting down due to poor matching between the battery terminal and the plug terminal and poor plug-in life. At the same time, it can also reduce the risk of fire caused by poor contact between the battery terminal and the plug terminal, thus facilitating the normal and safe operation of the battery pack and its docking device. In addition, the use of a terminal pressurizing mechanism to assist the connection between the battery terminal and the plug terminal also helps to reduce the difficulty of manufacturing and applying the battery terminal and the plug terminal, making it easier for the battery terminal and the plug terminal to meet the requirements of manufacturability and process feasibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of a battery pack and a docking device provided in an embodiment of the present application installed together.

[0017] Figure 2 yes Figure 1 A schematic diagram of a connection between a battery pack and a docking device.

[0018] Figure 3 yes Figure 1 A schematic diagram of a battery pack in FIG.

[0019] Figure 4 yes Figure 3 The cross-sectional view of the battery pack along the BB direction is shown.

[0020] Figure 5 yes Figure 3 An exploded view of the terminal press mechanism and battery terminals on the circuit board is shown.

[0021] Figure 6is Figure 3 A cross-sectional view of the terminal pressing mechanism and the battery terminal located in the plug-in portion when the battery pack is not inserted into the plug-in terminal.

[0022] Figure 7 is Figure 3 A schematic diagram of the terminal pressing mechanism and battery terminals on a circuit board when the battery pack is not inserted into the plug-in terminals.

[0023] Figure 8 is Figure 3 A cross-sectional view of the terminal pressing mechanism and the battery terminal located in the plug-in portion after the battery pack is inserted into the plug-in terminal.

[0024] Fig. 9 is Figure 3 A schematic diagram of the terminal pressurizing mechanism and the battery terminals on the circuit board after the battery pack is inserted into the plug-in terminal.

[0025] Main component symbols

[0026] Battery Pack 100

[0027] Shell 1

[0028] Main body part 11

[0029] Plug-in portion 12

[0030] Plug slot 121

[0031] Mounting slot 122

[0032] Battery cell 2

[0033] Circuit board 3

[0034] Battery Terminal 4

[0035] Mounting section 41

[0036] Elastic contact portion 42

[0037] Elastic clamping piece 421

[0038] Terminal pressing mechanism 5

[0039] Electromagnetic induction component 51

[0040] Adsorption parts 52

[0041] Base 521

[0042] Contact part 522

[0043] Adsorption unit 523

[0044] First guide slope 524

[0045] Pressed Parts 53

[0046] Main body 531

[0047] Pushing portion 532

[0048] Limiting part 533

[0049] Second guide slope 534

[0050] Elastic member 54

[0051] Docking device 200

[0052] Power Tools 200A

[0053] Case 201

[0054] Plug terminal 202

[0055] Control circuit 203

[0056] Motor 204

[0057] Actuator 205

[0058] Key switch 206 DETAILED DESCRIPTION

[0059] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only embodiments of a part of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present application. In the absence of conflict, the following different embodiments and features in the embodiments can be combined with each other.

[0060] In the description of the present application, it should be understood that the terms "first", "second", etc. are used to distinguish different objects, rather than to describe a specific order. Terms indicating orientation or positional relationships, such as "upper", "lower", "front", "back", "inner", "outer", etc., are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application.

[0061] See also Figure 1, which is a schematic diagram of a battery pack 100 and a docking device 200 provided in an embodiment of the present application. The battery pack 100 and the docking device 200 are detachably connected, and after the battery pack 100 and the docking device 200 are connected, power can be transmitted to the docking device 200. In practice, the docking device 200 may be an electrical device such as an electric tool 200A, wherein the electric tool 200A includes but is not limited to an impact wrench, an electric drill, an electric hammer, an angle grinder, a pipe expander, etc., and the battery pack 100 may serve as a portable power source for the connected electric tool 200A. For ease of description, the embodiment of the present application is described by taking the docking device 200 as an example in which the electric tool 200A is provided. Figure 1 In the illustration, the docking device 200 is taken as a pipe expanding machine as an example.

[0062] Please also read Figure 1 and Figure 2 The electric tool 200A includes a housing 201, a plug-in terminal 202, a control circuit 203, a motor 204, an actuator 205 and a key switch 206. The plug-in terminal 202, the control circuit 203, the key switch 206, the motor 204 and the actuator 205 are connected in sequence. The control circuit 203 and the motor 204 are both accommodated in the housing 201, and the plug-in terminal 202, the actuator 205 and the key switch 206 are all fixed to the housing 201 and exposed outside the housing 201. The actuator 205 is a component of the electric tool 200A used to perform actions, for example, Figure 1 The actuator 205 of the tube expander is a tube expander head. The key switch 206 is used as a start and stop switch of the electric tool 200A and can be pressed by an operator.

[0063] Please continue reading Figure 1 and Figure 2 The battery pack 100 includes a housing 1, and a battery cell unit 2 and a circuit board 3 contained in the housing 1. Figure 3 and Figure 4 The housing 1 includes a main body 11 and a plug-in portion 12. The plug-in portion 12 is protruding from the upper portion of the main body 11 and can be used to insert the power tool 200A, so that the battery pack 100 is plug-connected with the power tool 200A. For the convenience of description, the embodiment of the present application is described by taking the insertion direction of the power tool 200A as the rear direction and the direction opposite to the insertion direction of the power tool 200A as the front direction as an example.

[0064] The battery cell unit 2 and the circuit board 3 are accommodated in the main body 11, and the circuit board 3 is provided with a battery terminal 4 and a terminal pressing mechanism 5. The circuit board 3 can be placed on the side of the battery cell unit 2 close to the plug-in portion 12, so that the battery terminal 4 and the terminal pressing mechanism 5 on the circuit board 3 can be accommodated in the plug-in portion 12.

[0065] Further, such as Figure 6As shown, a plug-in slot 121 and a mounting slot 122 are provided inside the plug-in portion 12, and the plug-in slot 121 is arranged adjacent to the mounting slot 122. Specifically, the mounting slot 122 is arranged on one side of the plug-in slot 121 and is closer to the external environment than the plug-in slot 121, and the plug-in slot 121 is communicated with the mounting slot 122. The battery terminal 4 is installed in the plug-in slot 121, and the plug-in slot 121 is also communicated with the external environment to expose the battery terminal 4. The terminal pressurizing mechanism 5 is installed in the receiving slot.

[0066] In the embodiment of the present application, the battery terminal 4 is a female terminal, the plug terminal 202 is a male terminal, and the battery terminal 4 and the plug terminal 202 are compatible. Figure 5 As shown, the battery terminal 4 includes a mounting portion 41 and an elastic contact portion 42 connected to each other. The battery terminal 4 is mounted and connected to the circuit board 3 through the mounting portion 41. The elastic contact portion 42 has a certain elasticity and is formed with an opening for the plug-in terminal 202 to be inserted. For example, in one embodiment, Figure 5 As shown, the elastic contact portion 42 may include two elastic clamping pieces 421, both of which may be extended from the mounting portion 41, and the extension direction may be opposite to the insertion direction of the plug-in terminal 202, and the two elastic clamping pieces 421 are arranged in parallel and form an opening together. Figure 6 and Figure 7 As shown, the plug terminal 202 can be a sheet-like structure. Figure 8 and Fig. 9 As shown, the battery terminal 4 can be plug-connected with the plug-in terminal 202 through the elastic contact portion 42. When the plug-in terminal 202 is inserted into the opening, the elastic contact portion 42 can contact the plug-in terminal 202, and its two elastic clamping pieces 421 can clamp the plug-in terminal 202 together.

[0067] The battery terminal 4 and the terminal pressurizing mechanism 5 are both connected to the battery cell unit 2. The battery cell unit 2 can transmit electric energy when the battery terminal 4 is plugged into and electrically connected to the plug terminal 202. The terminal pressurizing mechanism 5 can press the battery terminal 4 against the plug terminal 202 when the battery cell unit 2 transmits electric energy, so that the battery terminal 4 and the plug terminal 202 are stably electrically connected.

[0068] It can be understood that the battery terminal 4 includes a positive terminal and a negative terminal, the positive terminal is connected to the positive electrode of the battery cell unit 2, and the negative terminal is connected to the negative electrode of the battery cell unit 2. Correspondingly, the number of the terminal pressurizing mechanisms 5 is two, and the two terminal pressurizing mechanisms 5 correspond to the positive terminal and the negative terminal one by one, and are connected to the positive and negative electrodes of the battery cell unit 2 one by one. Correspondingly, the power tool 200A includes a positive plug terminal 202 and a negative plug terminal 202, the positive plug terminal 202 is used to plug with the positive terminal, and the negative plug terminal 202 is used to plug with the negative terminal. It should be understood that in some other embodiments, the battery pack 100 can also be provided with more terminal pressurizing mechanisms 5, the positive terminal can correspond to at least one terminal pressurizing mechanism 5, and the negative terminal can also correspond to at least one terminal pressurizing mechanism 5.

[0069] In addition, in some embodiments, the circuit board 3 may also be provided with a battery management circuit (not shown), which may be connected between the battery terminal 4 and the battery cell 2 and used to control the charging and discharging of the battery cell 2. The battery terminal 4 may also include a signal terminal (see Figure 5 ), the signal terminal can be located between the positive terminal and the negative terminal, and is used to connect to the battery management circuit. The power tool 200A can also include a signal plug terminal 202 (not shown) connected to the control circuit 203, the signal plug terminal 202 is used to plug with the signal terminal, and the control circuit 203 and the battery management circuit can transmit relevant information of the power tool 200A or the battery pack 100 through the signal plug terminal 202 and the signal terminal. In one embodiment, the battery pack 100 can also be provided with a terminal pressurizing mechanism 5, so that the terminal pressurizing mechanism 5 corresponds to the positive terminal, the negative terminal and the signal terminal one by one, so as to ensure that the signal terminal is stably plugged into the signal plug terminal 202, and the battery terminal 4 is stably plugged into the plug terminal 202.

[0070] like Figure 5 and Figure 6 As shown, the terminal pressurizing mechanism 5 includes an electromagnetic induction component 51, an adsorbent 52, a pressing component 53 and an elastic component 54. Among them, the adsorbent 52, the pressing component 53 and the elastic component 54 are all distributed on one side of the battery terminal 4, and the electromagnetic induction component 51 is adjacent to the adsorbent 52 and is arranged at intervals. Specifically, the electromagnetic induction component 51 can be located behind the adsorbent 52 at a certain distance, and the distance is, for example, about 1.5 mm. Among them, the adsorbent 52 can move in the receiving groove toward the direction close to or far away from the electromagnetic induction component 51. The pressing component 53 is located between the adsorbent 52 and the battery terminal 4. The elastic component 54 is located between the pressing component 53 and the battery terminal 4. Specifically, one end of the elastic component 54 can contact the limiting portion 533 of the pressing component 53, and the other end of the elastic component 54 can contact the groove wall between the mounting groove 122 and the plug-in groove 121.

[0071] Furthermore, the electromagnetic induction component 51 includes a magnetic core and a coil wound on the magnetic core. The coil of the electromagnetic induction component 51 is connected to the battery cell unit 2. Based on this, when the battery cell unit 2 transmits electric energy, the electromagnetic induction component 51 is powered on and generates a magnetic field, thereby generating a corresponding magnetic attraction. When the battery cell unit 2 does not transmit electric energy, the electromagnetic induction component 51 is powered off and cannot generate a magnetic attraction.

[0072] The adsorption member 52 includes a base 521, an abutment portion 522 and an adsorption portion 523, wherein the abutment portion 522 is bent and extended from the first end of the base 521, so that at least a portion of the abutment portion 522 is located in front of the pressing portion. The adsorption portion 523 is bent and extended from the second end of the base 521, so as to be arranged opposite to the electromagnetic induction component 51. Among them, the abutment portion 522 and the adsorption portion 523 can be bent and arranged multiple times to improve the strength. The adsorption member 52 is made of a magnetic metal material such as iron, iron alloy, etc. When the electromagnetic induction component 51 is energized and generates a magnetic attraction, the magnetic attraction can act on the adsorption portion 523 of the adsorption member 52, thereby attracting the entire adsorption member 52 to move toward the electromagnetic induction component 51.

[0073] The pressing member 53 is provided with a main body 531, a push portion 532 and a limit portion 533. The main body 531 is in contact with the adsorption member 52. The push portion 532 is extended from the main body 531 toward the direction of the battery terminal 4, and the push portion 532 corresponds to the connection position between the plug-in slot 121 and the mounting slot 122. In the absence of any intervention, there is a certain distance between the push portion 532 of the pressing member 53 and the elastic contact portion 42 of the battery terminal 4, and the distance is, for example, about 1.3 mm. The limit portion 533 is protruding from the main body 531 toward the direction of the battery terminal 4, and the elastic member 54 is assembled on the limit portion 533 and limited by the limit portion 533. The pressing member 53 can be made of insulating and non-magnetic materials such as nylon. The elastic member 54 can be, for example, a spring, or an elastic material member such as a rubber member.

[0074] Based on this design, when you need to use a 200A power tool, Figure 1 As shown, the electric tool 200A can be installed on the top surface of the main body 11 of the battery pack 100 and above the plug-in portion 12, so that the plug-in terminal 202 of the electric tool 200A enters the plug-in portion 12 and plugs and connects with the battery terminal 4. Before the plug-in terminal 202 of the electric tool 200A is inserted into the battery terminal 4 of the battery pack 100, there is a spacing of, for example, about 1.3 mm between the push portion 532 of the pressing member 53 and the elastic contact portion 42 of the battery terminal 4. After the plug-in terminal 202 of the electric tool 200A is inserted into the battery terminal 4 of the battery pack 100, there is still a spacing of, for example, about 0.9 mm between the push portion 532 of the pressing member 53 and the elastic contact portion 42 of the battery terminal 4.

[0075] Furthermore, the key switch 206 of the power tool 200A can be pressed. Once the key switch 206 of the power tool 200A is pressed, the key switch 206 is in a closed, conducting state. Figure 2 As shown, the battery cell unit 2, the battery terminal 4, the plug terminal 202, the control circuit 203, the control switch, the motor 204 and the actuator 205 can be connected to form a path. At this time, the battery terminal 4 is electrically connected to the plug terminal 202, and the electric energy output by the battery cell unit 2 can be transmitted to the control circuit 203 through the battery terminal 4 and the plug terminal 202. After the control circuit 203 obtains electricity, it can control the motor 204 to work, thereby driving the actuator 205 to perform corresponding actions. For example, Figure 1 The motor 204 in the pipe expander shown can drive the pipe expansion head to expand the diameter of the pipe.

[0076] When the battery cell unit 2 outputs electric energy, the electric energy output by the battery cell unit 2 is also supplied to the terminal pressurizing mechanism 5 . After being powered on, the terminal pressurizing mechanism 5 can push the battery terminal 4 so that the battery terminal 4 keeps in contact with the plug-in terminal 202 .

[0077] Specifically, the electric energy output by the battery cell unit 2 is supplied to the electromagnetic induction element in the terminal pressurizing mechanism 5, so that the electromagnetic induction element is energized and generates a magnetic attraction force, which can act on the adsorption portion 523 of the adsorption member 52, thereby attracting the entire adsorption member 52 to move toward the electromagnetic induction component 51. During the movement of the adsorption member 52, the abutment portion 522 of the adsorption member 52 contacts the main body 531 of the pressing member 53, thereby pushing the entire pressing member 53. Under the push of the adsorption member 52, the pressing member 53 also moves toward the battery terminal 4, and its abutment portion 532 enters the plug-in slot 121 and contacts the elastic contact portion 42 of the battery terminal 4, thereby pushing the elastic contact portion 42 to move, for example, by about 1 mm, thereby pressing the elastic contact portion 42 tightly against the plug-in terminal 202. When the pressing member 53 moves toward the direction close to the battery terminal 4, the limiting portion 533 of the pressing member 53 presses the elastic member 54 toward the groove wall between the installation groove 122 and the plug groove 121, thereby compressing and deforming the elastic member 54. When the adsorbing member 52 moves about 1.5 mm toward the electromagnetic induction component 51, so that the adsorbing portion 523 of the adsorbing member 52 fits the electromagnetic induction component 51, the adsorbing member 52 stops moving, that is, the stroke ends, and the push portion 532 still keeps pressing the elastic contact portion 42.

[0078] Because under the action of the terminal pressing mechanism 5, the battery terminal 4 can stably clamp the plug terminal 202, so it can prevent the battery terminal 4 from being deformed during long-term repeated plugging and unplugging, and the opening size from becoming larger, which may lead to poor contact between the battery terminal 4 and the plug terminal 202, thereby ensuring the normal operation of the power tool 200A and avoiding power failure and shutdown of the power tool 200A. At the same time, it can also avoid the generation of electric sparks and reduce the risk of fire.

[0079] In one embodiment, the adsorbent 52 may also be provided with a first guiding slope 524, which may be specifically provided at a side of the abutting portion 522 of the adsorbent 52 facing the pressing member 53. Correspondingly, the pressing member 53 has a second guiding slope 534, which may be specifically provided at a side of the main body 531 of the pressing member 53 facing the abutting portion 522. The first guiding slope 524 and the second guiding slope 534 are parallel to each other. The abutting portion 522 of the adsorbent 52 may abut against the second guiding slope 534 of the pressing member 53 through the first guiding slope 524, and the first guiding slope 524 and the second guiding slope 534 may guide the movement of the adsorbent 52, ensuring that the adsorbent 52 may accurately and stably push against the pressing member 53.

[0080] Further, when the power tool 200A does not need to be used, the key switch 206 of the power tool 200A can be pressed again.

[0081] Once the key switch 206 of the electric tool 200A is pressed again, the key switch 206 pops up and is in the disconnected state. Based on this, the battery cell 2, the battery terminal 4, the plug terminal 202, the control circuit 203, the control switch, the motor 204 and the actuator 205 are disconnected. At this time, the battery terminal 4 is not electrically connected to the plug terminal 202, the battery cell 2 stops outputting, and the control circuit 203 is powered off and stops running.

[0082] When the battery cell unit 2 stops outputting electric energy, the terminal pressing mechanism 5 is also powered off and stops pressing the battery terminal 4 .

[0083] Specifically, when the battery cell unit 2 stops transmitting electric energy, the electromagnetic induction component 51 is powered off and stops generating magnetic attraction, so it cannot attract the adsorption member 52. In the absence of magnetic attraction, the adsorption member 52 cannot push the pressing member 53, the pushing portion 532 of the pressing member 53 cannot press the elastic contact portion 42, and the pressing member 53 cannot compress the elastic member 54. At this time, the elastic member 54 that has been compressed and deformed can rebound and generate a certain rebound force. Under the action of the rebound force, the entire pressing member 53 moves in a direction away from the battery terminal 4, for example, by about 1 mm, so that the pushing portion 532 of the pressing member 53 is away from the elastic contact portion 42 of the battery terminal 4 and returns to the mounting groove 122. During the movement, the pressing member 53 pushes the adsorption member 52, so that the adsorption member 52 moves in a direction away from the electromagnetic induction component 51, for example, by about 1.5 mm. When the elastic member 54 returns to its original state, the rebound force disappears, and the pressing member 53 and the adsorption member 52 return to their original positions.

[0084] Furthermore, when the terminal pressing mechanism 5 stops pushing the battery terminal 4, the power tool 200A can be easily removed, the plug-in terminal 202 of the power tool 200A is detached from the battery terminal 4 of the battery pack 100, and the distance between the pushing portion 532 of the pressing part 53 and the elastic contact portion 42 of the battery terminal 4 is restored to its original size of about 1.3 mm.

[0085] It should be understood that the above-mentioned spacing sizes are only illustrative examples of the embodiments of the present application and can be set accordingly according to actual conditions, which does not constitute a limitation to the present application.

[0086] In addition, in other embodiments, the docking device 200 can also be a charging device for the battery pack 100, and the battery pack 100 can be charged by the connected charging device. The charging device can also include corresponding plug terminals, a control circuit and a push switch, and the plug terminals and the push switch are connected to the control circuit. The charging device can also be plugged and connected to the battery terminal 4 of the battery pack 100 through the corresponding plug terminals. When the charging device transmits electrical energy to the battery pack 100, the terminal pressurizing mechanism 5 can also apply pressure to the battery terminal 4 to ensure that the battery terminal 4 is stably connected to the corresponding plug terminal. For details, please refer to the previous description of the plug-in connection between the power tool 200A and the battery pack 100, so it will not be repeated here.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application has been described in detail with reference to the preferred embodiments, a person of ordinary skill in the art should understand that the technical solution of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present application.

Claims

1. A battery pack, characterized in that: The battery pack comprises a shell, a battery cell unit and a circuit board, wherein the battery cell unit and the circuit board are accommodated in the shell, and the circuit board is provided with a battery terminal and a terminal pressurizing mechanism, wherein: The battery terminal is connected to the battery cell unit and is also used to be plugged into the plug-in terminal of the docking device. The battery cell unit is used to transmit electric energy when the battery terminal and the plug-in terminal of the docking device are plugged in and electrically connected; The terminal pressing mechanism includes an electromagnetic induction component, an adsorption component and a pressing component, wherein the electromagnetic induction component is connected to the battery cell unit and is used to energize and generate magnetic attraction when the battery cell unit transmits electric energy; The adsorbing member is adjacent to the electromagnetic induction component and is arranged at an interval. The pressing member is arranged on one side of the battery terminal and is located between the adsorbing member and the battery terminal. The adsorbing member is used to move toward the electromagnetic induction component under the action of the magnetic attraction force and push the pressing member during the movement. The pressing member presses the battery terminal against the plug terminal under the push of the adsorbing member.

2. The battery pack according to claim 1, characterized in that: The battery cell unit is used to stop transmitting electric energy when the battery terminal is not electrically connected to the plug terminal, and the electromagnetic induction component is used to stop generating magnetic attraction when the battery cell unit stops transmitting electric energy; The terminal pressing mechanism further includes an elastic member, which is disposed between the pressing member and the battery terminal, and the pressing member compresses the elastic member when moving toward the direction close to the battery terminal; When the electromagnetic induction component stops generating magnetic attraction, the pressing member is used to move in a direction away from the battery terminal under the elastic force of the elastic member, and push the adsorption member during the movement so that the adsorption member is away from the electromagnetic induction component.

3. The battery pack according to claim 1, wherein: The battery terminal includes a connected mounting portion and an elastic contact portion, wherein the mounting portion is used to connect the circuit board, the elastic contact portion is formed with an opening, the opening is used for the plug-in terminal to be inserted, and the elastic contact portion is used to contact the plug-in terminal when the plug-in terminal is inserted into the opening; the pressing member is used to push the elastic contact portion under the push of the adsorption member, thereby pressing the elastic contact portion against the plug-in terminal.

4. The battery pack according to claim 1, wherein: The adsorption part includes a base, an abutment part and an adsorption part, the abutment part is bent and extended from the first end of the base, and the abutment part is used to abut the pressing part under the action of the magnetic attraction force; the adsorption part is bent and extended from the second end of the base, and is arranged opposite to the electromagnetic induction component, and the magnetic attraction force of the electromagnetic induction component acts on the adsorption part.

5. The battery pack according to claim 4, characterized in that: The abutting portion is provided with a first guiding slope, the pressing member is provided with a second guiding slope, the first guiding slope and the second guiding slope are parallel to each other, and the abutting portion is used to abut the second guiding slope of the pressing member through the first guiding slope.

6. The battery pack according to claim 1, wherein: The pressing part is provided with a main body, a pushing part and a limiting part. The main body is in contact with the adsorption part. The pushing part is extended from the main body toward the direction of the battery terminal, and is used to push the battery terminal under the push of the adsorption part; the limiting part is protruded from the main body toward the direction of the battery terminal, and is used to assemble the elastic part and limit the elastic part.

7. The battery pack according to claim 1, characterized in that: The housing comprises a main body and a plug-in portion protruding from the main body, the main body is used to accommodate the battery cell unit and the circuit board, and the circuit board is arranged on a side of the battery cell unit close to the plug-in portion; The plug-in portion is used for the docking device to be plugged in, and a plug-in slot and an installation slot are provided inside the plug-in portion. The plug-in slot is connected to the external environment, and the plug-in slot is used to accommodate the battery terminal and for the plug-in terminal to be inserted; the installation slot is arranged adjacent to and connected to the plug-in slot, and the installation slot is used to accommodate the terminal pressurizing mechanism, and the pressing member is used to enter the plug-in slot under the push of the adsorption member to push the battery terminal.

8. The battery pack according to claim 1, wherein: The battery terminal includes a positive terminal and a negative terminal, the positive terminal is connected to the positive electrode of the battery cell unit and is also used to be plugged into the positive plug terminal of the docking device; the negative terminal is connected to the negative electrode of the battery cell unit and is also used to be plugged into the negative plug terminal of the docking device; Correspondingly, the number of the terminal pressurizing mechanisms is at least two, and at least two of the terminal pressurizing mechanisms correspond one-to-one to the positive terminal and the negative terminal.

9. An electric tool, detachably connected to a battery pack, characterized in that: The electric tool includes a housing, a motor, a control circuit and a plug-in terminal, wherein the motor and the control circuit are both housed in the housing, and the plug-in terminal is exposed from the housing. The control circuit is used to connect to the battery pack via the plug-in terminal to obtain power, wherein the battery pack is a battery pack as described in any one of claims 1 to 8, and the control circuit is also connected to the motor and is used to control the operation of the motor when obtaining power.

10. The electric tool according to claim 9, characterized in that: The electric tool also includes a key switch connected to the control circuit. When the plug terminal and the battery terminal are plugged in and the key switch is pressed, the battery unit transmits electrical energy to the control circuit through the battery terminal and the plug terminal; when the key switch pops up, the battery unit stops transmitting electrical energy to the control circuit.

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