Tool assembly, electric tool and battery pack

Abstract

The utility model relates to a tool assembly, an electric tool and a battery pack. The tool assembly comprises a battery pack and an electric tool, the electric tool can be in plug-in connection with the battery pack in the plug-in direction, and the battery pack is used for charging or supplying power to the electric tool; the tool assembly is further provided with an identification system. The identification system is arranged on the battery pack and / or the electric tool and is used for enabling the output power of the battery pack to be matched with the power supply power required by the electric tool after the electric tool is inserted into the battery pack; or the identification system is arranged on the battery pack and the electric tool and is used for assembling the battery pack and the electric tool with matched output power and power supply power in an identifiable manner. A user can enable the output power and the power supply power of the battery pack and the inserted electric tool to be matched with each other or prevent the battery pack with the output power not matched with the power supply power from being inserted into the electric tool for use through the identification system, so that the electric tool and the battery pack are protected, and the service life of the electric tool or the battery pack is prolonged.

Description

Technical Field

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

[0002] Power tools are usually used in conjunction with battery packs. Different power tools often require different power supplies. Battery packs generally have set maximum output voltage and maximum current. If a power tool is plugged in with an incompatible battery pack, it may cause damage to the power tool or components such as the chip inside the battery pack. However, the power tool and the battery pack are uniquely matched, which means that when using multiple power tools together, you need to carry multiple corresponding matching battery packs, which is costly and extremely inconvenient. Utility Model Content

[0003] In view of this, it is necessary to provide a tool assembly, an electric tool and a battery pack.

[0004] The present application provides a tool assembly, including a battery pack and an electric tool, wherein the electric tool can be plugged and connected to the battery pack along a plugging direction, and the battery pack is used to charge or power the electric tool;

[0005] The tool assembly is also provided with an identification system; the identification system is arranged in the battery pack and / or the electric tool, and is used to match the output power of the battery pack with the power supply required by the electric tool after the electric tool and the battery pack are plugged in; or, the identification system is arranged in the battery pack and the electric tool, and is used to identifiably assemble the battery pack whose output power and power supply power match the electric tool.

[0006] In one embodiment of the present application, the identification system includes a signal identification device, the signal identification device includes a signal receiving component, an output power adjustment structure and a signal feedback component, the signal receiving component and the output power adjustment structure are arranged on the battery pack, and the signal feedback component is arranged on the electric tool;

[0007] The signal feedback component can be electrically connected to the signal receiving component after the electric tool and the battery pack are plugged in, and send a power supply value signal required by the electric tool to the signal receiving component; the output power adjustment structure is electrically connected to the signal receiving component, and is used to adjust the output power of the battery pack according to the power supply value signal received by the signal receiving component, so that the output power of the battery pack matches the power supply required by the electric tool.

[0008] In one embodiment of the present application, the signal receiving component and the output power adjustment structure are an integrated one-piece structure.

[0009] In one embodiment of the present application, the identification system includes a structure identification device, the structure identification device includes a first identification structure and a second identification structure, the first identification structure is arranged on the battery pack, and the second identification structure is arranged on the power tool, the first identification structure and the second identification structure both extend along the plug-in direction, and the first identification structure and the second identification structure match each other so that the battery pack with matching output power and supply power can be assembled with the power tool in an identifiable manner.

[0010] In one embodiment of the present application, the first identification structure includes a plurality of grooves, and the second identification structure includes protrusions corresponding to at least some of the grooves.

[0011] In one embodiment of the present application, the number of protrusions in the second identification structure is less than or equal to the number of grooves in the first identification structure, and the electric tools with different second identification structures can be plugged and matched with the same battery pack.

[0012] In one embodiment of the present application, the electric tool further includes a mounting member and an electrode sheet, the electrode sheet includes a positive electrode sheet and a negative electrode sheet, and the positive electrode sheet, the negative electrode sheet and the protrusion are all fixedly mounted on the mounting member.

[0013] In one embodiment of the present application, a plurality of protrusions are provided on the same electric tool, and the shapes and / or heights of the plurality of protrusions are different.

[0014] The present application also provides an electric tool, which is the electric tool mentioned above.

[0015] The present application also provides a battery pack, which is the battery pack mentioned above.

[0016] With the tool assembly provided in the present application, the user can use the identification system to match the output power of the battery pack with the power supply required by the plugged-in power tool, or prevent the battery pack whose output power does not match the required power supply from being plugged into the power tool, thereby protecting the power tool and the battery pack, extending the service life of the power tool or the battery pack, giving full play to the performance of the power tool, effectively improving the versatility of the battery pack, reducing overall costs, and improving the user's work convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of a partial structure of a tool assembly in one embodiment;

[0018] Figure 2 for Figure 1 Schematic diagram of the structure of the battery pack;

[0019] Figure 3 for Figure 1 A schematic diagram of the structure of part of the tool assembly;

[0020] Figure 4 A schematic diagram of a partial structure of a tool assembly in another embodiment;

[0021] Figure 5 for Figure 4 Schematic diagram of the structure of the battery pack;

[0022] Figure 6 for Figure 4 A schematic diagram of some structures of electric tools;

[0023] Figure 7 for Figure 6 Schematic diagram from another angle;

[0024] Figure 8 A partial structural schematic diagram of an electric tool in another embodiment;

[0025] Fig. 9 A partial structural schematic diagram of an electric tool in another embodiment;

[0026] Fig.10 A partial structural schematic diagram of an electric tool in another embodiment;

[0027] Fig.11 is a schematic structural diagram of a battery pack in another embodiment;

[0028] Fig.12 A partial structural schematic diagram of an electric tool in another embodiment;

[0029] Fig.13 is a schematic structural diagram of a battery pack in another embodiment;

[0030] Fig.14 for Fig.13 A partial enlarged view of the middle X section;

[0031] Fig.15 A partial structural schematic diagram of an electric tool in another embodiment;

[0032] Fig.16 is a schematic structural diagram of a battery pack in another embodiment;

[0033] Fig.17 A partial structural schematic diagram of an electric tool in another embodiment;

[0034] Fig.18 FIG. 4 is a schematic diagram of the structure of a battery pack in another embodiment.

[0035] 100. Identification system; 101. Signal identification device; 102. Structure identification device; 10. Battery pack; 11. Electrode slot; 12. Second identification structure; 121. Second guide surface; 13. Signal receiving component; 14. Output power adjustment structure; 15. Charging port; 20. Mounting component; 21. Electrode sheet; 22. First identification structure; 221. First guide surface; A. Insertion direction. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0037] It should be noted that when a component is referred to as being "connected to" another component, it may be directly connected to the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. When a component is considered to be "fixed to" another component, it may be directly fixed to the other component or there may be a central component at the same time.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "or / and" used herein includes any and all combinations of one or more of the related listed items.

[0039] See also Figures 1 to 3 The tool assembly includes an electric tool (the entire structure is not shown in the figure) and a battery pack 10. The electric tool is usually used in conjunction with the battery pack 10. The electric tool can be connected in the direction of insertion ( Figure 1 The battery pack 10 is plugged and connected to the power tool in the direction of A in the figure. The battery pack 10 is used to charge or supply power to the power tool. The power tool is a tool that drives the working head through a transmission mechanism, which can be an electric screwdriver, an electric wrench, an electric drill, etc.

[0040] The electric tool includes an electric tool body (not shown), a mounting member 20 and an electrode sheet 21. The mounting member 20 is fixedly mounted at the end of the electric tool body. The electrode sheet 21 includes a positive electrode sheet and a negative electrode sheet. Both the positive electrode sheet and the negative electrode sheet are fixedly mounted on the mounting member 20. In some embodiments, the mounting member 20 is a sheet-like structure. It can be understood that in other embodiments, the mounting member 20 can also be in other shapes and can also be integrally formed with the electric tool body.

[0041] The battery pack 10 is provided with an electrode slot 11 corresponding to the electrode sheet 21 . The electrode slot 11 includes a positive electrode slot and a negative electrode slot, which correspond to the positive electrode sheet and the negative electrode sheet respectively.

[0042] Power tools are usually used in conjunction with battery packs. Different power tools often require different power supplies. Battery packs generally have set maximum output voltage and maximum current. If a power tool is plugged in with an incompatible battery pack, it may cause damage to the power tool or components such as the chip inside the battery pack. However, the power tool and the battery pack are uniquely matched, which means that when using multiple power tools together, you need to carry multiple corresponding matching battery packs, which is costly and extremely inconvenient.

[0043] For example, the battery pack and the electric tool are triangular plug-in structures that can match each other, but the battery pack is a 20V battery pack, and the voltage adapted to the electric tool is 12V. Although the electric tool can be successfully plugged into the battery pack, after plugging in, in the working state, the output power of the battery pack is obviously too large, and its output current also obviously exceeds the needs of the electric tool, which can easily cause the motor of the electric tool to burn out. On the contrary, the battery pack is a 12V battery pack, and the voltage adapted to the electric tool is 20V. In the working state, after the electric tool is successfully plugged into the battery pack, the output power of the battery pack is obviously difficult to meet the needs of the electric tool, which will not cause damage to the electric tool, but it is difficult to give full play to the performance of the electric tool.

[0044] In order to solve the above problems, the tool assembly of the present application is also provided with an identification system 100; the identification system 100 is arranged in the battery pack 10 and / or the electric tool, and is used to match the output power of the battery pack 10 with the power supply power required by the electric tool after the electric tool and the battery pack 10 are plugged in; or, the identification system 100 is arranged in the battery pack 10 and the electric tool, and is used to assemble the battery pack 10 whose output power and power supply power match the electric tool in an identifiable manner.

[0045] With such a configuration, the user can use the identification system 100 to match the output power of the battery pack 10 with the power supply required by the power tool after the battery pack 10 is plugged into the power tool, or prevent the battery pack 10 whose output power does not match the required power supply from being plugged into the power tool for use, thereby protecting the power tool and the battery pack 10, extending the service life of the power tool or the battery pack 10, effectively improving the versatility of the battery pack 10, reducing overall costs, and improving the user's work convenience.

[0046] The above-mentioned "the output power of the battery pack 10 matches the power supply required by the power tool" means that the battery pack 10 can output the power supply required by different power tools in different states. In other words, the battery pack is not the only compatible relationship with a certain type of power tool or a certain power tool, and the battery pack can be used in a one-to-many manner. Specifically, the power tool generally has a rated power P, and the corresponding rated current value that the power tool can withstand is assumed to be defined as I. Exceeding a certain preset range of the rated power or exceeding a certain preset range of the rated current value A is likely to cause damage to the power tool.

[0047] For example, if you need to carry three different power tools at the same time when doing a certain job, if the "preset range" mentioned above is set to 10%, the rated powers of the three power tools are P1, P2 and P3 respectively, and the corresponding rated current values ​​are I1, I2 and I3, then the maximum output powers that the three power tools can withstand are P1+10%P1, P2+10%P2 and P3+10%P3 respectively, and the maximum output currents that they can withstand are I1+10%I1, I2+10%I2 and I3+10%I3. At this time, "the output power of the battery pack 10 matches the power supply required by the power tool" means that when the battery pack 10 is plugged into the three power tools, the maximum output power that can be output is less than or equal to P1+10%P1, P2+10%P2, P3+10%P3, and the maximum output current that the battery pack 10 can output is less than or equal to I1+10%I1, I2+10%I2, I3+10%I3, respectively, to ensure that the battery pack 10 can be plugged into different power tools and meet the needs of different power tools in different states, and will not output power and current beyond the range that the power tool can withstand, thereby ensuring the safety of the power tool. It can be understood that the above-mentioned "preset range" can be set according to specific circumstances and is not limited here.

[0048] Furthermore, electric tools generally have a no-load state and a load state. In the no-load state, the electric tool does not drive external components, so there is no additional consumption, and the required power supply power is relatively small. At this time, the battery pack 10 can reduce the output power or discharge current as long as it can meet the needs of the electric tool in the no-load state. When the electric tool is in the load state, that is, when it is connected and needs to drive external parts to work, it requires a larger consumption. At this time, the required power supply power or the required current value will rise sharply. At this time, the output power or discharge current of the battery pack 10 needs to reach or meet the rated power and rated current values ​​required by the electric tool. It can be understood that the output power and discharge current of the battery pack 10 are not completely stable values. There may be a small range of fluctuations in the process of cooperating with the electric tool, but the fluctuation will not exceed the maximum power or maximum current value that the electric tool can withstand while meeting the needs of the electric tool in the current state.

[0049] Similarly, it can be understood that "the battery pack 10 with matching output power and supply power is identifiably assembled with the electric tool" means that the battery pack 10 has a fixed maximum output power and maximum output current, which is not adjustable and cannot meet the needs of electric tools with different rated powers at the same time, but can only meet the needs of one type of electric tool adapted thereto. For example, when the rated power of a certain type of electric tool is P4 and the rated current is I4, and the preset range mentioned above is set to 10%, the maximum output power and maximum output current of the battery pack 10 that can be successfully plugged into the electric tool must be P4+10%P4 and I4+10%I4. In other words, this type of electric tool and this battery pack are the only compatible relationship.

[0050] See also Figures 1 to 3 , exemplarily, in one embodiment of the present application, the identification system 100 includes a signal identification device 101, and the signal identification device 101 includes a signal receiving component 13, an output power adjustment structure 14 and a signal feedback component (not shown in the figure), the signal receiving component 13 and the output power adjustment structure 14 are arranged on the battery pack 10, and the signal feedback component is arranged on the power tool. The signal feedback component can be electrically connected to the signal receiving component 13 after the power tool and the battery pack 10 are plugged in, and send a power supply value signal required by the power tool to the signal receiving component 13; the output power adjustment structure 14 is electrically connected to the signal receiving component 13, and is used to adjust the output power of the battery pack 10 according to the power supply value signal received by the signal receiving component 13, so that the output power of the battery pack 10 matches the power supply power required by the power tool. That is, in this embodiment, the signal identification device 101 can put the identification system 100 in an adjustment mode, and the battery pack 10 can adjust the output power to match different power tools.

[0051] With such a configuration, different electric tools can be matched and plugged with the same battery pack 10, and the signal receiving component 13 in the battery pack 10 can receive the power supply value signal fed back by the signal feedback component in the electric tool, so that the output power adjustment structure 14 in the battery pack 10 can adjust the output power of the battery pack 10 according to the power supply value signal, so that electric tools with different power supply requirements can be adapted for use with the same battery pack 10, avoiding damage to the electric tool or the internal chip of the battery pack 10 and other components, effectively improving the working performance of the tool, extending the service life of different electric tools, and improving the versatility of the battery pack 10. Moreover, the staff does not need to purchase and carry multiple battery packs 10 when working, which effectively reduces the working cost and improves the convenience of work.

[0052] Specifically, when the output power adjustment structure 14 adjusts the maximum output power of the battery pack 10 to match different power tools, it can take corresponding measures to limit the discharge current of the battery pack 10 (that is, the output current of the battery pack 10). Exemplarily, some methods and structures of current limiting include:

[0053] Method 1: Current limiting with series resistor

[0054] A resistor is connected in series between the positive and negative electrodes of the battery, and the resistance value is selected according to actual needs. When current flows through the resistor, a certain voltage drop will be generated, thereby limiting the discharge current of the battery pack 10.

[0055] Method 2: MOS tube current limiting

[0056] Current limiting can be achieved by using MOSFET (Metal Oxide Semiconductor Field Effect Transistor). MOSFET has low internal resistance and dynamic response speed, and its impedance can be changed by controlling the gate voltage, thereby achieving current limiting control of the discharge current of the battery pack 10.

[0057] Method 3: Linear regulator current limiting

[0058] The linear regulator places a large capacitor through polarity so that at the instantaneous peak value of the current, the large capacitor can provide a part of the current and thus play a buffering role, thereby achieving current limiting control of the discharge current of the battery pack 10.

[0059] Method 4. PWM current limiting

[0060] Through PWM (Pulse Width Modulation) technology, the on and off of the switch elements in the circuit can be quickly switched, thereby achieving current limiting control of the discharge current of the battery pack 10. PWM can play an effective control role in current limiting and is relatively simple to implement.

[0061] It is understood that a variety of different measures can be taken to limit the discharge current of the battery pack, including but not limited to the above-mentioned methods 1 to 4, and a suitable method can be selected according to the actual situation. At the same time, the method of limiting current and the magnitude of the limited current need to be determined according to the characteristics and working requirements of the device.

[0062] Further, it can be understood that the signal receiving element 13 and the output power adjustment structure 14 can be separately provided or integrated. Figure 3 In this embodiment, in order to reduce the required installation space and improve the adjustment efficiency, the signal receiving element 13 and the output power adjustment structure 14 are integrated into one structure.

[0063] In addition, it should be noted that in some embodiments, when the electric tool is not provided with a signal feedback component or the signal feedback component fails to normally send a power supply value signal to the signal receiving component 13, that is, when the signal receiving component 13 does not receive the power supply value signal, the recognition system 100 will switch from the adjustment mode to the protection mode, and the output power adjustment structure 14 of the signal recognition device 101 will adjust the output power of the battery pack 10 to the preset minimum output power to avoid damaging the electric tool. The preset minimum output power is set according to the actual situation and is not limited here.

[0064] Furthermore, the battery pack 10 and the electric tool may also be provided with a power-off protection structure to prevent the battery pack 10 from discharging significantly in a short period of time or to prevent the electric tool from receiving too large a discharge current. For example, the generation of current in some devices is related to the cutting of magnetic flux lines. When the electric tool is connected to an external component and rotates rapidly, the magnetic flux lines are quickly cut, which will cause the current to rise sharply and the voltage to drop. When the current value is too large and the voltage is too low, in order to prevent internal damage, the power-off protection structure can be automatically activated to cut off the power to achieve self-protection, that is, to disconnect the electrical connection between the battery pack and the electric tool. The power-off protection structure can be set in the battery pack 10 or in the electric tool. In most cases, the electric tool will have a built-in power-off protection structure.

[0065] See also Figures 4 to 18In some other embodiments of the present application, the identification system 100 includes a structure identification device 102, and the structure identification device 102 includes a first identification structure 22 and a second identification structure 12. The first identification structure 22 is arranged on the battery pack 10, and the second identification structure 12 is arranged on the power tool. The first identification structure 22 and the second identification structure 12 both extend along the plug-in direction, and the first identification structure 22 and the second identification structure 12 match each other, so that the battery pack 10 with matching output power and supply power can be assembled with the power tool in an identifiable manner. In other words, the first identification structure 22 is arranged on the battery pack 10, and the second identification structure 12 is arranged on the power tool. The first identification structure 22 and the second identification structure 12 both extend along the plug-in direction, and the first identification structure 22 and the second identification structure 12 match each other, so that the battery pack 10 and the power tool can be assembled in an identifiable manner.

[0066] With such a configuration, the user can determine whether the power tool and the battery pack 10 match each other through the first identification structure 22 and the second identification structure 12, and prevent the unmatched battery pack 10 from being plugged into the power tool for use, so as to extend the service life of the power tool or the battery pack 10. That is, when the battery pack 10 is plugged into the power tool, the first identification structure 22 and the second identification structure 12 that cannot match each other can prevent the battery pack 10 and the power tool from being fully plugged in and connected, and prevent the battery pack whose output power does not match the required power supply from being plugged into the power tool for use, so as to prevent the internal chip or other structure of the battery pack 10 or the power tool from being damaged.

[0067] It can be understood that the structure recognition device 102 is equivalent to ensuring that the power tool is plugged in and used with the adapted battery pack 10 through mechanical structure design, ensuring that the battery pack 10 whose output power matches the power supply power required by the power tool can be successfully plugged in with the power tool. It can be understood that this type of battery pack 10 has a fixed maximum output power and maximum output current, which is not adjustable and cannot meet the needs of power tools with different rated powers at the same time. The signal recognition device 101 flexibly adjusts the output power of the battery pack 10 through signal reception and recognition, that is, the maximum output power and maximum output current of the battery pack 10 are adjustable, and the output power of the battery pack 10 can be adjusted to a state adapted to the power tool according to the needs of the plugged power tool, thereby ensuring the safety of the power tool after plugging in the battery pack 10 and giving full play to the performance of the power tool.

[0068] For example, in some embodiments, the first recognition structure 22 includes a plurality of grooves, and the second recognition structure 12 includes protrusions corresponding to at least some of the grooves.

[0069] The second identification structure 12 on the power tool is set to a protrusion. If an existing battery pack 10 without a groove structure is assembled with it, the protrusion structure will hinder the advancement of the power tool, thereby preventing the power tool and the battery pack 10 from being mistakenly inserted and assembled, thereby protecting the power tool and the chip and battery inside the battery.

[0070] It is understandable that the first identification structure 22 can also be set as a protrusion, and correspondingly, the second identification structure 12 can also be set as a groove. Alternatively, part of the structure of the first identification structure 22 is set as a protrusion, and the other part is set as a groove, and correspondingly, part of the structure of the second identification structure 12 is set as a groove, and the other part is set as a protrusion. The concave-convex matching structure can prevent the power tool and the battery pack 10 from being mis-inserted and assembled, thereby protecting the power tool and the chip and battery inside the battery.

[0071] It should be noted that the number of protrusions and the number of grooves can be the same, or the number of protrusions can be less than the number of grooves. Figures 5 to 10 As shown, in some embodiments, the number of protrusions in the second identification structure 12 is less than or equal to the number of grooves in the first identification structure 22 , and electric tools with different second identification structures 12 can be plugged and matched with the same battery pack 10 .

[0072] Specifically, Figure 5 The middle battery pack 10 is provided with three square columnar grooves. Figure 7 , Figure 8 The mounting member 20 shown in the figure is provided with three square column-shaped protrusions. Figure 5 When the battery pack 10 is inserted, the three protrusions are respectively inserted into the three grooves. Fig. 9 The mounting member 20 shown is provided with two square columnar protrusions. Fig.10 The mounting member 20 shown is provided with only one protrusion. Fig. 9 or Fig.10 The electric tool with the mounting member 20 Figure 5 When the battery pack 10 is plugged in, only part of the grooves are used, and the rest of the grooves are empty.

[0073] With such an arrangement, different types of electric tools can also be matched with the same type of battery pack 10, which can save production costs.

[0074] In some embodiments, the height of the protrusion is not higher than the height of the positive electrode sheet or the negative electrode sheet along the plugging direction A. Such a configuration will not increase the original size of the power tool in the plugging direction A. Of course, the height of the protrusion may also be higher than the height of the positive electrode sheet or the negative electrode sheet, and this application does not limit this.

[0075] In some embodiments, Figures 11 to 15As shown, the mounting member 20 of the same electric tool is provided with a plurality of protrusions, and the shapes and / or heights of the plurality of protrusions are different. Fig.11 and Fig.12 As shown, the protrusion can be configured as a combination of a triangular prism and a square prism, and the groove can also be a combination of a triangular prism-shaped groove and a square prism-shaped groove; Figures 13 to 15 As shown, the height of the protrusion can be different, and the depth of the corresponding groove is also different. It is understandable that in some embodiments not shown, the shape and height of the protrusion can be different, as long as the protrusion can be inserted into the groove, which is not limited here.

[0076] In some embodiments, Figures 16 to 18 As shown, the protrusion is a columnar structure, and the cross-sectional shape of the protrusion is a special shape, specifically, it can be a rectangle, triangle, ellipse, rhombus, regular polygon or other non-circular shape, as long as the protrusion and the groove can be plugged. Fig.16 and Fig.17 As shown, both the protrusion and the groove are in the shape of "concave"; Fig.18 As shown, the groove is in the shape of a combination of multiple rectangles.

[0077] In some embodiments, see Fig.13 and Fig.14 , a side of the groove relatively close to the protrusion is provided with a chamfer to form a first guide surface 221; and / or, a side of the protrusion relatively close to the groove is provided with a chamfer to form a second guide surface 121. With such a configuration, when the protrusion is plugged into the groove, the smoothness of the docking can be increased. In particular, after the electrode sheet 21 has been plugged into the electrode slot 11 for a portion of its length, the design of the first guide surface 221 and the second guide surface 121 can prevent the protrusion and the groove from causing adverse effects such as shaking and displacement on the plugging of the electrode sheet 21 and the electrode slot 11 when plugging.

[0078] The present application also provides an electric tool, which is the electric tool mentioned above.

[0079] The present application also provides a battery pack 10, which is the above-mentioned battery pack 10. Further, the battery pack 10 is provided with a charging port 15, and when the battery pack 10 is low on power or exhausted, the battery pack 10 can be charged through the charging port 15. The interface size of the charging port 15 of the battery pack 10 can be set to 2.5mm-3.5mm. Figure 3 In one embodiment, the interface size of the charging port 15 of the battery pack 10 is set to 3.2 mm.

[0080] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0081] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present application and are not used as limitations on the present application. As long as they are within the spirit of the present application, appropriate changes and modifications to the above embodiments are within the scope of protection required by the present application.

Claims

1. A tool assembly, characterized in that: It comprises a battery pack and an electric tool, wherein the electric tool can be plugged and connected with the battery pack along a plugging direction, and the battery pack is used to charge or supply power to the electric tool; The tool assembly is also provided with an identification system; the identification system is arranged in the battery pack and / or the electric tool, and is used to match the output power of the battery pack with the power supply required by the electric tool after the electric tool and the battery pack are plugged in; or, the identification system is arranged in the battery pack and the electric tool, and is used to identifiably assemble the battery pack whose output power and power supply power match the electric tool.

2. The tool assembly according to claim 1, characterized in that The recognition system includes a signal recognition device, which includes a signal receiving component, an output power adjustment structure and a signal feedback component, wherein the signal receiving component and the output power adjustment structure are arranged on the battery pack, and the signal feedback component is arranged on the electric tool; The signal feedback component can be electrically connected to the signal receiving component after the electric tool and the battery pack are plugged in, and send a power supply value signal required by the electric tool to the signal receiving component; the output power adjustment structure is electrically connected to the signal receiving component, and is used to adjust the output power of the battery pack according to the power supply value signal received by the signal receiving component, so that the output power of the battery pack matches the power supply required by the electric tool.

3. The tool assembly according to claim 2, characterized in that The signal receiving element and the output power regulating structure are integrated into one body.

4. The tool assembly according to claim 1, characterized in that The identification system includes a structure identification device, which includes a first identification structure and a second identification structure. The first identification structure is arranged on the battery pack, and the second identification structure is arranged on the power tool. The first identification structure and the second identification structure both extend along the plug-in direction. The first identification structure and the second identification structure match each other so that the battery pack with matching output power and supply power can be assembled with the power tool in an identifiable manner.

5. The tool assembly according to claim 4, characterized in that The first identification structure includes a plurality of grooves, and the second identification structure includes protrusions corresponding to at least some of the grooves.

6. The tool assembly according to claim 5, characterized in that The number of protrusions in the second identification structure is less than or equal to the number of grooves in the first identification structure, and the electric tools with different second identification structures can be plugged and matched with the same battery pack.

7. The tool assembly according to claim 5, characterized in that The electric tool further comprises a mounting member and an electrode sheet, wherein the electrode sheet comprises a positive electrode sheet and a negative electrode sheet, and the positive electrode sheet, the negative electrode sheet and the protrusion are all fixedly mounted on the mounting member.

8. The tool assembly according to claim 5, characterized in that A plurality of protrusions are provided on the same electric tool, and the shapes and / or heights of the plurality of protrusions are different.

9. An electric tool, characterized in that: The electric tool is the electric tool according to any one of claims 1 to 8.

10. A battery pack, characterized in that: The battery pack is the battery pack according to any one of claims 1 to 8.

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