Battery pack, power tool, and connecting device

Abstract

A battery pack, a power tool, and a connecting device. The battery pack comprises a battery pack body and a battery connecting device. The battery connecting device comprises a device body and multiple battery connecting terminals. The multiple battery connecting terminals are arranged on the device body, and can at least transmit electrical energy; the battery connecting terminals are configured to have a cylindrical structure; and the battery connecting terminals are configured to withstand a maximum current of less than or equal to 400 A.

Description

Battery packs, power tools and connection devices

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on October 30, 2023, with application number 202311428640.8, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to an electrical device, for example, a battery pack, an electric tool and a connecting device. Background Art

[0003] Large power tools like lawn mowers and snow blowers are often powered by battery packs, making them easy to carry and operate. However, the electrical connection between the battery pack and the power tool is inconvenient, has poor reliability, and does not meet safety regulations.

[0004] This section provides background information related to the present application which is not necessarily prior art.

[0005] Summary of the Invention

[0006] One purpose of the present application is to solve the problems of inconvenient electrical connection, poor reliability and non-compliance with safety regulations between a battery pack and a power tool. To this end, one purpose of the present application is to provide a battery pack, a power tool, a connection device and a connection device suitable for a battery pack.

[0007] In order to achieve the above objectives, this application adopts the following technical solutions:

[0008] In a first aspect, a battery pack is provided, comprising: a battery pack body; and a battery connecting device; the battery connecting device comprises: a device body; a plurality of battery connecting terminals, arranged on the device body and capable of at least transmitting electrical energy; the battery connecting terminals are configured as a cylindrical structure; the battery connecting terminals are configured to withstand a maximum current of less than or equal to 400A.

[0009] In some embodiments, the battery connection terminal is configured to output a rated current greater than or equal to 120A.

[0010] In some embodiments, the plurality of battery connection terminals include two power terminals, three signal terminals and a ground terminal, the three signal terminals are arranged in a triangle, the two power terminals are arranged on both sides of the three signal terminals, and the ground terminal is arranged in the middle of the three signal terminals.

[0011] In some embodiments, one end of the power terminal and one end of the signal terminal are both connected to the device body, and the other end of the power terminal is higher than the other end of the signal terminal.

[0012] In some embodiments, the device body is formed with a connecting portion and multiple accommodating portions with accommodating cavities, the connecting portion is installed to the battery pack body, the battery connecting terminals are accommodated in the accommodating cavities one by one, and the shape of the accommodating cavities is adapted to the shape of the connecting terminals.

[0013] In some embodiments, at least one of the receiving portions forms a foolproof mechanism.

[0014] In some embodiments, the cross-sectional area of ​​the device body is less than or equal to 4000 mm 2 .

[0015] In some embodiments, the device body is provided with a guiding mechanism, and the guiding direction of the guiding mechanism is parallel to the extending direction of the battery connection terminal.

[0016] In some embodiments, an insulating column is provided in the battery connection terminal, and a center line of the insulating column is parallel to a center line of the battery connection terminal.

[0017] In the second aspect, an electric tool is provided, comprising: a tool body; a tool connecting device; the tool connecting device comprises: a device body; a plurality of tool connecting terminals, which are arranged on the device body and can at least transmit electrical energy; the tool connecting terminals are arranged to have a cylindrical structure; the tool connecting terminals are arranged to withstand a maximum current of less than or equal to 400A.

[0018] According to a third aspect, a connecting device is provided, which is installed on a battery pack for an electric tool, and the connecting device includes: a device body; a plurality of battery connecting terminals, which are arranged on the device body and can at least transmit electrical energy between the battery pack and the electric tool; the battery connecting terminals are arranged to have a cylindrical structure; and the connecting terminals are arranged to withstand a maximum current of less than or equal to 400A.

[0019] In a fourth aspect, a connecting device is provided, which is installed on a battery pack for an electric tool, and the connecting device includes: a device body; a plurality of battery connecting terminals, which can at least transmit electrical energy between the battery pack and the electric tool; the device body is provided with a plurality of independent accommodating cavities, and the battery connecting terminals are arranged in the accommodating cavities one by one.

[0020] In a fifth aspect, a connection device suitable for a battery pack is provided, the connection device comprising: a device body; a plurality of battery connection terminals, arranged on the device body; the battery connection terminals are arranged as a cylindrical structure; and a first sealing structure is provided at the connection between the device body and the battery pack.

[0021] In some embodiments, a second sealing structure is provided between the root of the connecting terminal and the device body.

[0022] In some embodiments, the first sealing structure is a sealing gasket.

[0023] In some embodiments, the device body and the battery pack have an interference fit.

[0024] The benefits of this application lie in that the device body is mounted on a power tool battery pack, the male connector is mounted on the power tool's battery compartment, and the connecting terminal is configured as a cylindrical structure. The male connector includes a cylindrical male terminal that adapts to the cylindrical structure. The male terminal and the connecting terminal are plugged together to achieve electrical connection, thereby achieving an electrical connection between the battery pack and the power tool for power supply, with a convenient and reliable connection. The cylindrical male terminal and the cylindrical connecting terminal have large cross-sectional areas, improving structural reliability and increasing the current carrying capacity to 400A, meeting the safety requirements of large battery packs used to power power tools. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG1 is a schematic diagram of a battery pack installed in a battery compartment of a power tool according to an embodiment of the present application;

[0026] FIG2 is a schematic diagram of a battery connection device according to an embodiment of the present application being installed on a battery pack;

[0027] FIG3 is a schematic diagram of a tool connection device installed in a battery compartment according to an embodiment of the present application;

[0028] FIG4 is a front view of a battery connection device according to an embodiment of the present application;

[0029] FIG5 is a schematic diagram of a battery connection device according to an embodiment of the present application;

[0030] FIG6 is another front view of a battery connection device according to an embodiment of the present application;

[0031] FIG7 is a cross-sectional view taken along line AA of FIG6 ;

[0032] FIG8 is a schematic diagram of a tool connection device according to an embodiment of the present application;

[0033] FIG9 is a partial schematic diagram of a tool connection device installed in a battery compartment according to an embodiment of the present application;

[0034] FIG10 is a schematic diagram of a first tool connection terminal according to an embodiment of the present application;

[0035] FIG11 is a schematic diagram of a second tool connection terminal according to an embodiment of the present application;

[0036] FIG12 is a schematic diagram of a third tool connection terminal according to an embodiment of the present application;

[0037] FIG13 is a schematic diagram of a battery pack and various electric tools according to an embodiment of the present application.

[0038] In the picture:

[0039] 100, battery connection device; 200, battery pack; 300, battery compartment; 400, tool connection device; 401, tool connection terminal; 4011, horizontal stripes; 4012, vertical stripes; 4013, diagonal stripes; 402, cable; 403, device body; 404, guide post; 405, mounting cavity; 406, drain hole; 500, power tool; 500a, riding lawn mower; 500b, snow blower; 200c, all-terrain vehicle; 500d, push lawn mower; 500e, portable power supply; 600, third sealing structure;

[0040] 1. Equipment body; 11. Connecting part; 111. Mounting hole; 12. Slot; 13. Accommodating cavity; 14. Accommodating part; 2. Battery connection terminal; 21. Power terminal; 22. Signal terminal; 23. Ground terminal; 3. Guide mechanism; 31. Guide groove; 32. Guide rib; 4. Error prevention mechanism; 5. Insulating column; 6. First sealing structure; 7. Second sealing structure; 8. Locking mechanism; 81. Lock buckle; 82. First metal sheet; 83. Second metal sheet. DETAILED DESCRIPTION

[0041] Before any embodiments of the present application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the foregoing drawings.

[0042] In this application, the terms "comprises," "includes," "has," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0043] In this application, the term "and / or" describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Additionally, the character " / " in this application generally indicates that the related objects are in an "and / or" relationship.

[0044] In this application, the terms "connect," "combine," "couple," and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without an intermediary, and an indirect connection refers to two parts or components being connected to at least one intermediary, with the two parts or components being connected via the intermediary. Furthermore, "connect" and "couple" are not limited to physical or mechanical connections or couplings and may include electrical connections or couplings.

[0045] In this application, it will be understood by those skilled in the art that relative terms (e.g., "about," "approximately," "substantially," etc.) used in conjunction with quantities or conditions include the values ​​and have the meaning indicated by the context. For example, the relative terms include at least the degree of error associated with the measurement of a specific value, the tolerance caused by manufacturing, assembly, use, etc. associated with a specific value. Such terms should also be considered to disclose a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. In addition, "substantially" may refer to plus or minus a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) on the basis of the indicated angle when expressing a relative angular position relationship (e.g., substantially parallel, substantially perpendicular).

[0046] In this application, it will be understood by those skilled in the art that the function performed by an assembly can be performed by one assembly, multiple assemblies, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one assembly, or a combination of multiple parts.

[0047] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to the other element "upper" or "lower", but also be indirectly connected to the other element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, below can include directly below, lower left, lower right, lower front and lower back, etc.

[0048] As shown in Figures 1 to 9 and Figure 13, this embodiment provides a battery pack 200 that can be installed on an electric tool 500 to power the electric tool. The electric tool 500 can be a wheeled tool or a garden tool. Figure 13 illustrates several common wheeled tools, such as a riding lawn mower 500a, a snow blower 500b, an all-terrain vehicle 500c, and a push lawn mower 500d. It should be noted that various other common wheeled devices that can be powered by the battery pack 200 are also within the scope of protection of this application, such as a mobile power supply unit (English translation: power station) 500e, a wheeled fan, a wheeled lighting device, a wheeled blower, and a cleaning vehicle. In this embodiment, the electric tool can also be referred to as an outdoor wheeled device, an outdoor wheeled tool, or a wheeled tool. The so-called wheeled tool can be understood as a tool having a running wheel set that supports the tool body, and the running wheel set can drive the tool body to move under the drive of a motor.

[0049] In this embodiment, the nominal voltage of the battery pack 200 is greater than or equal to 30V. It is understood that the nominal voltage of the battery pack 200 can be greater than or equal to 20V and less than or equal to 100V, or greater than or equal to 36V and less than or equal to 80V, or greater than or equal to 40V and less than or equal to 60V. Alternatively, the nominal voltage of the battery pack 200 can be greater than or equal to 100V and less than or equal to 800V. It is understood that the nominal voltage of the battery pack 200 can be 20V, 24V, 36V, 40V, 48V, 56V, 60V, 80V, 100V, 200V, or 300V. This allows the voltages of different battery packs in an outdoor wheeled device using multiple battery packs 200 to take into account the voltage platforms of other battery packs, thereby increasing the total energy of the battery packs in the wheeled device. When at least two battery packs 200 are installed in the outdoor wheeled equipment, the nominal voltages of the at least two battery packs 200 may be the same or different.

[0050] The weight of the battery pack 200 is greater than or equal to 10 kg. Alternatively, the weight of the battery pack 200 is greater than or equal to 15 kg. Alternatively, the weight of the battery pack 200 is greater than or equal to 16 kg. Alternatively, the weight of the battery pack 200 is greater than or equal to 17 kg. Alternatively, the weight of the battery pack 200 is greater than or equal to 18 kg. Alternatively, the weight of the battery pack 200 is greater than or equal to 19 kg. Alternatively, the weight of the battery pack 200 is greater than or equal to 20 kg. The gravimetric energy density of the battery pack is greater than or equal to 100 Wh / kg and less than or equal to 200 Wh / kg. Alternatively, the gravimetric energy density of the battery pack 200 is greater than or equal to 120 Wh / kg and less than or equal to 200 Wh / kg. Alternatively, the gravimetric energy density of the battery pack 200 is greater than or equal to 100 Wh / kg and less than or equal to 150 Wh / kg. Alternatively, the gravimetric energy density of the battery pack 200 is greater than or equal to 150 Wh / kg and less than or equal to 200 Wh / kg. The volume energy density of the battery pack 200 is greater than or equal to 100wh / L and less than or equal to 200wh / L. Alternatively, the volume energy density of the battery pack 200 is greater than or equal to 150wh / L and less than or equal to 200wh / L. Alternatively, the volume energy density of the battery pack 200 is greater than or equal to 90wh / L and less than or equal to 200wh / L. Alternatively, the volume energy density of the battery pack 200 is greater than or equal to 100wh / L and less than or equal to 150wh / L. A higher weight energy density or volume energy density allows the outdoor wheeled equipment 100 to obtain more energy when a battery pack of the same volume or weight is installed, thereby ensuring the endurance of the wheeled equipment. For example, it can ensure that the wheeled equipment can work outdoors for half a day, while also taking into account the size or load requirements of the equipment itself.

[0051] The total energy of the battery pack 200 is greater than or equal to 1 kw·h and less than or equal to 8 kw·h. Alternatively, the total energy of the battery pack 200 is greater than or equal to 1 kw·h and less than or equal to 4 kw·h. Alternatively, the total energy of the battery pack 200 is greater than or equal to 500 w·h and less than or equal to 2 kw·h. Alternatively, the total energy of the battery pack 200 is greater than or equal to 2 kw·h and less than or equal to 6 kw·h. Alternatively, the total energy of the battery pack 200 is greater than or equal to 4 kw·h and less than or equal to 8 kw·h. Alternatively, the total energy of the battery pack 200 is greater than or equal to 300 w·h and less than or equal to 8 kw·h. In this way, when at least one battery pack 200 in the outdoor wheeled device 100 is fully charged, the outdoor wheeled device can mow the lawn for 4 to 6 hours using the battery pack 200.

[0052] The rated discharge power of the battery pack 200 is greater than or equal to 2 kW and less than or equal to 8 kW. Alternatively, the rated discharge power of the battery pack 200 is greater than or equal to 3 kW and less than or equal to 8 kW. Alternatively, the rated discharge power of the battery pack 200 is greater than or equal to 4 kW and less than or equal to 8 kW. Alternatively, the rated discharge power of the battery pack 200 is greater than or equal to 5 kW and less than or equal to 8 kW. In this embodiment, the continuous maximum discharge power of the battery pack 200 is greater than or equal to 300 kW and less than or equal to 8 kW. Alternatively, the continuous maximum discharge power of the battery pack 200 is greater than or equal to 3 kW and less than or equal to 15 kW. Alternatively, the continuous maximum discharge power of the battery pack 200 is greater than or equal to 4 kW and less than or equal to 10 kW. Alternatively, the continuous maximum discharge power of the battery pack 200 is greater than or equal to 2 kW and less than or equal to 10 kW. This makes the discharge efficiency of the battery pack 200 placed in the outdoor wheeled equipment higher. It should be noted that the continuous maximum discharge power is the discharge power under normal working conditions of the outdoor wheeled equipment, and the instantaneous abnormally large discharge power that occurs when the outdoor wheeled equipment is stalled or cutting some stones does not include the continuous maximum discharge power mentioned in this embodiment.

[0053] In one embodiment, a battery compartment 300 may be provided on the power tool 500 to install or secure the battery pack 200. The battery compartment 300 may be a closed compartment or a semi-closed compartment, and the battery pack 200 may be movably connected to the battery compartment 300 or inactively connected to the battery compartment 300, or the battery pack 200 may be pluggably installed in the battery compartment 300.

[0054] The connection between the battery pack 200 and the power tool 500 includes a mechanical connection and an electrical connection. For the mechanical connection, the battery pack 200 can be mounted on the power tool 500 by mechanical fixing or supporting means. For the electrical connection, the battery pack 200 can be connected to the power tool 500 by means of cables or electrical connectors. However, when using cables for electrical connection, the cable connection and the mechanical connection are performed separately, which makes installation inconvenient. The cables are also welded together, which makes assembly and disassembly inconvenient. When using electrical connectors for electrical connection, one of the male and female connectors is connected to the battery pack 200 and the other is connected to the power tool 500. During assembly, the male and female connectors are plugged together to achieve electrical connection, which is convenient. However, the male and female connectors are connected by a needle-like structure such as a pin or a sheet-like structure such as a metal sheet. The current they can withstand is limited and does not meet the safety requirements between a large battery pack and a power tool 500. In addition, the structural strength is poor and may break when bumps occur, resulting in poor connection reliability.

[0055] This embodiment provides a battery pack, including a battery pack body and a battery connection device 100 disposed on the battery pack body. The battery connection device 100 includes a device body 1 and a plurality of battery connection terminals 2. The battery connection terminals 2 are disposed on the device body 1 and are capable of transmitting at least electrical energy. The battery connection terminals 2 are configured as cylindrical structures and are configured to withstand a maximum current of 400A or less.

[0056] This embodiment provides an electric tool, including a tool body and a tool connection device 400. The tool connection device 400 includes a device body 403 and a plurality of tool connection terminals 401. The tool connection terminals 401 are arranged on the device body 403 and are at least capable of transmitting electric energy. The tool connection terminal 401 is configured as a cylindrical structure; the tool connection terminal 401 is configured to withstand a maximum current of less than or equal to 400A. The battery connection device 100 is used in conjunction with the tool connection device 400. The cylindrical structure of the battery connection terminal 2 is adapted to the cylindrical structure of the tool connection terminal 401. One end of the tool connection terminal 401 is plugged into the battery connection terminal 2, and the other end of the tool connection terminal 401 is connected to the tool body through a cable 402, thereby realizing the transmission of electric energy between the battery pack 200 and the electric tool 500, thereby realizing the electrical connection between the battery pack 200 and the electric tool 500 for power supply, and the connection is convenient and reliable.

[0057] Compared with the related art, in which the terminals are needle-shaped or sheet-shaped, the cylindrical tool connection terminal 401 and the cylindrical battery connection terminal 2 have large cross-sectional areas, which improves structural reliability and thus meets safety requirements.

[0058] As shown in Figures 4-7 , by configuring battery connection terminals 2 to have a cylindrical structure, battery connection terminals 2 are configured to withstand a maximum current of less than or equal to 400A. For example, the maximum current can be 330A, 340A, 350A, 360A, 370A, 380A, 390A, etc. This improves the current-carrying capacity of battery connection terminals 2, thereby meeting the safety requirements of a large battery pack 200 used to power a power tool 500. In one embodiment, battery connection terminals 2 are configured to output a rated current of greater than or equal to 120A, also improving the current-carrying capacity of battery connection terminals 2. Similarly, as shown in Figures 8 and 9, by configuring the tool connection terminal 401 to have a cylindrical structure, the tool connection terminal 401 is configured to withstand a maximum current of less than or equal to 400A. For example, the maximum current may be 330A, 340A, 350A, 360A, 370A, 380A, 390A, etc. This improves the current-carrying capacity of the tool connection terminal 401, thereby meeting the safety requirements of the large battery pack 200 used to power the power tool 500. In one embodiment, the tool connection terminal 401 is configured to output a rated current of greater than or equal to 120A, similarly improving the current-carrying capacity of the tool connection terminal 401.

[0059] The aperture size of the battery connection terminal 2 and the diameter size of the tool connection terminal 401 , as well as the material of the battery connection terminal 2 , can be set based on experiments or calculations, etc., without limitation.

[0060] As shown in Figures 4 to 7, the multiple battery connection terminals 2 include two power terminals 21, three signal terminals 22, and a ground terminal 23. The power terminal 21 is configured to provide power, the signal terminal 22 is configured to transmit data signals, and the ground terminal 23 is connected to a grounding body to provide good grounding conditions. Among them, the three signal terminals 22 are arranged in a triangle, with the two power terminals 21 located on both sides of the three signal terminals 22, and the ground terminal 23 located in the middle of the three signal terminals 22. The multiple battery connection terminals 2 are arranged in a centralized manner through the above arrangement, and the structure is compact. In addition, the arrangement of the battery connection terminals 2 above enables the battery connection device 100 to form an asymmetric structure, preventing the battery connection device 100 from being inserted in the wrong direction when docking with the tool connection device 400, facilitating identification, and improving safety and reliability.

[0061] The cross-sectional area of ​​the device body 1 is less than or equal to 4000mm 2 By arranging multiple battery connection terminals 2 on the device body 1 with the aforementioned cross-sectional area, the total area occupied by the battery connection terminals 2 is limited, achieving centralized arrangement and a compact structure. The cross-section may be rectangular, racetrack-shaped, elliptical, or quasi-elliptical, etc., without limitation, with a length M of 80 mm or less and a width N of 50 mm or less.

[0062] As shown in Figure 4, the device body 1 is formed with a connecting portion 11 and multiple accommodating portions 14 with accommodating cavities 13. The connecting portion 11 is mounted to the battery pack 200, and the battery connection terminals 2 are accommodated in the accommodating cavities 13 one by one. The shape of the accommodating cavities 13 is compatible with the shape of the battery connection terminals 2. The signal terminals 22, power terminals 21, and ground terminals 23 are arranged in different independent accommodating cavities 13, increasing the safety distance between different battery connection terminals 2. The connecting portion 11 has a mounting hole 111, and screws and other fasteners are inserted through the mounting hole 111 to connect to the battery pack 200, thereby enabling the battery connection device 100 to be installed on the battery pack 200.

[0063] As shown in Figures 6 and 7, one end of the power terminal 21 and one end of the signal terminal 22 are both connected to the device body 1. The other end of the power terminal 21 is higher than the other end of the signal terminal 22. When the battery connection device 100 is plugged into the tool connection device 400, the tool connection terminal 401 that mates with the power terminal 21 first contacts the power terminal 21, and the tool connection terminal 401 that mates with the signal terminal 22 later contacts the signal terminal 22. The height difference between the power terminal 21 and the signal terminal 22 ensures the timing of the power terminal 21 and the signal terminal 22 contacting the tool connection terminal 401, thereby achieving charging and discharging safety protection. In one embodiment, the height of the ground terminal 23 is between the height of the power terminal 21 and the height of the signal terminal 22, and the height of the ground terminal 23 is slightly less than the height of the power terminal 21.

[0064] As shown in FIG4 , at least one receiving portion 14 forms an anti-mismatch mechanism 4 . For example, if the receiving portion 14 is provided with protrusions, depressions, or other features to form the anti-mismatch mechanism 4 , the battery connection device 100 has an asymmetrical, irregular structure. This prevents incorrect insertion of the tool connection device 400 and the battery connection device 100 , facilitates identification, and improves safety and reliability. In one embodiment, the outer periphery of the receiving portion 14 for accommodating the power terminal 21 is provided with protrusions. In other embodiments, the outer periphery of the receiving portion 14 for accommodating the signal terminal 22 or the receiving portion 14 for accommodating the ground terminal 23 may also be provided with protrusions, etc., without limitation.

[0065] As shown in Figures 4 and 8, the device body 1 is provided with a slot 12, and the receiving portion 14 is disposed within the slot 12. The tool connection device 400 includes a device body 403, which defines a mounting cavity 405. The mounting cavity 405 is adapted to fit within the receiving portion 14, and the tool connection terminal 401 is correspondingly disposed within the mounting cavity 405. When the battery connection device 100 and the tool connection device 400 are connected, the device body 403 is inserted into the slot 12, the receiving portion 14 is inserted into the mounting cavity 405, and the tool connection terminal 401 is inserted into the battery connection terminal 2.

[0066] The plugging direction of the battery pack 200 and the battery compartment 300 is the same as the plugging direction of the tool connection terminal 401 and the battery connection terminal 2, that is, when the battery pack 200 is plugged into the battery compartment 300, the plugging of the tool connection terminal 401 and the battery connection terminal 2 is realized, which further facilitates the installation and electrical connection of the battery pack 200 and the power tool 500 and reduces the assembly steps.

[0067] As shown in Figures 1 and 3, a locking mechanism 8 is provided at the entrance and exit of the battery compartment 300, providing both locking and lock feedback functions. The locking mechanism 8 comprises a latch 81 and an interlock switch mounted on the latch 81. The latch 81 is configured to lock the battery pack 200. To remove the battery pack 200 from the battery compartment 300, the latch 81 must first be unlocked, and then the battery pack 200 can be removed. The interlock switch on the latch 81 provides lock feedback to confirm the locked and unlocked states, ensuring that the circuit is de-energized before the battery pack 200 is removed. When the latch 81 is unlocked, the circuit is disconnected. When the latch 81 is locked, the circuit is open, providing power-off protection when the battery pack 200 is removed, reducing the risk of sparks. Exemplarily, the lock buckle 81 is provided with a first metal sheet 82, and the battery compartment 300 is provided with a second metal sheet 83. When the lock buckle 81 is configured to lock the battery pack 200, the first metal sheet 82 and the second metal sheet 83 contact to form a passage; when the lock buckle 81 unlocks the battery pack 200, the first metal sheet 82 and the second metal sheet 83 separate to form a short circuit.

[0068] As shown in Figures 5 and 8, the device body 1 is provided with a guide mechanism 3. The guiding direction of the guide mechanism 3 is parallel to the extension direction of the battery connection terminals 2. The tool connection device 400 is inserted into the battery connection device 100 along the guide mechanism 3, thereby improving the connection precision between the battery connection device 100 and the tool connection device 400. For example, the guide mechanism 3 includes a guide groove 31 formed in the device body 1. The guide groove 31 is adapted to adapt to a guide post 404 formed on the device body 403. The guide post 404 is inserted into the guide groove 31, and the guide post 404 and the device body 403 are connected together to provide greater mechanical strength. The side walls of the guide groove 31 are provided with guide ribs 32. The guide ribs 32 contact the guide posts 404, reducing the contact area and improving smoothness. Two guide posts 404 are provided, and the plurality of tool connection terminals 401 are located between the two guide posts 404.

[0069] As shown in Figure 4 , an insulating post 5 is installed within the battery connection terminal 2. The centerline of the insulating post 5 is parallel to the centerline of the battery connection terminal 2, providing finger protection and further improving safety and reliability. The insulating post 5 can be made of plastic, for example. Accordingly, the tool connection terminal 401 has a clearance hole, into which the insulating post 5 is inserted.

[0070] As shown in Figures 10-12, the portion of the tool connection terminal 401 that plugs into the battery connection terminal 2 is the plug-in terminal portion. The outer periphery of the plug-in terminal portion is provided with a pattern that increases friction with the battery connection terminal 2. This pattern can clean dirt and dust from the battery connection terminal 2 during insertion and removal. The pattern can be horizontal patterns 4011, vertical patterns 4012, diagonal patterns 4013, or other irregular patterns, without limitation.

[0071] As shown in Figure 8, the device body 403 is provided with a leak hole 406 that communicates with the mounting cavity 405 to prevent water from accumulating inside. A sealing gasket is provided between the tool connection terminal 401 and the device body 403 to provide waterproof and dustproof properties. The device body 403 and the battery compartment 300 are sealed together by a third sealing structure 600, which is illustratively a sealing gasket, providing waterproof and dustproof properties.

[0072] As shown in Figures 1-9, this embodiment provides a connection device for attaching to a battery pack 200 for a power tool 500. The specific structure is the same as that of the battery connection device of Example 1 and will not be further described. The device body 1 may be formed on the battery pack body, or the device body 1 may be detachably connected to the battery pack body.

[0073] As shown in Figures 1-9, this embodiment provides a connection device that is mounted on a battery pack 200 for a power tool 500. The connection device includes a device body 1 and multiple battery connection terminals 2. The battery connection terminals 2 are capable of at least transmitting electrical energy between the battery pack 200 and the power tool. Its structure and usage are basically the same as those of the previous embodiment, and the similarities are not repeated here. The difference is that the device body 1 is provided with multiple independent accommodating cavities 13, and the battery connection terminals 2 are arranged in a one-to-one correspondence within the accommodating cavities 13. By arranging the battery connection terminals 2 in different independent accommodating cavities 13, the safety distance between different battery connection terminals 2 is increased. In one embodiment, the device body 1 is provided with multiple accommodating portions 14, and the accommodating cavities 13 are arranged in the accommodating portions 14. The multiple accommodating portions 14 are spaced apart, further increasing the safety distance between different battery connection terminals 2.

[0074] As shown in Figures 1 to 9, this embodiment provides a connection device suitable for a battery pack, which includes a device body 1 and a plurality of battery connection terminals 2, and the battery connection terminals 2 are arranged on the device body 1. The battery connection terminals 2 are arranged as a cylindrical structure. Its structure and usage are basically the same as those of the previous embodiment, and the similarities are not repeated here. The difference is that a first sealing structure 6 is provided at the connection between the device body 1 and the battery pack 200, which has waterproof and dustproof effects, and the connection device and the battery pack 200 have a waterproof rating of IP67. In one embodiment, the first sealing structure 6 is a sealing gasket, which is installed in an annular groove on the outside of the device body 1. When the device body 1 is installed on the battery pack 200, the sealing gasket is clamped between the device body 1 and the battery pack 200 to form a seal. In another embodiment, the device body 1 and the battery pack 200 are interference fit to form a sealed connection.

[0075] A second sealing structure 7 is provided between the root of the battery connection terminal 2 and the device body 1. For example, a sealing gasket is provided between the battery connection terminal 2 and the device body 1, which has waterproof and dustproof effects, and the internal waterproof level of the connection device reaches IP67.

[0076] The above shows and describes the basic principles, main features and advantages of this application. Those skilled in the art should understand that the above embodiments do not limit this application in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation fall within the scope of protection of this application.

Claims

1. A battery pack, comprising: Battery pack body; as well as A battery connection device (100) is configured to be at least connectable to the electric tool to power the electric tool, or to be connected to a charging device to charge the battery pack; The battery connection device (100) comprises: Device body (1); A plurality of battery connection terminals (2), arranged on the device body (1), capable of at least transmitting electrical energy; Wherein, the battery connection terminal (2) is configured as a cylindrical structure; the battery connection terminal (2) is configured to withstand a maximum current of less than or equal to 400A.

2. The battery pack according to claim 1, wherein: The battery connection terminal (2) is configured to output a rated current greater than or equal to 120A.

3. The battery pack according to claim 1, wherein: The plurality of battery connection terminals (2) include two power terminals (21), three signal terminals (22) and a ground terminal (23); the three signal terminals (22) are arranged in a triangle; the two power terminals (21) are arranged on both sides of the three signal terminals (22); and the ground terminal (23) is arranged in the middle of the three signal terminals (22).

4. The battery pack according to claim 3, wherein: One end of the power terminal (21) and one end of the signal terminal (22) are both connected to the device body (1), and the other end of the power terminal (21) is higher than the other end of the signal terminal (22).

5. The battery pack according to claim 1, wherein: The device body (1) is formed with a connecting portion (11) and a plurality of accommodating portions (14) with accommodating cavities (13); the connecting portion (11) is mounted to the battery pack body; the battery connecting terminals (2) are accommodated in the accommodating cavities (13) one by one; and the shape of the accommodating cavities (13) is adapted to the shape of the battery connecting terminals (2).

6. The battery pack according to claim 5, wherein: At least one of the receiving portions (14) forms an error-proofing mechanism (4).

7. The battery pack according to any one of claims 1 to 5, wherein: The cross-sectional area of ​​the device body (1) is less than or equal to 4000 mm 2 .

8. The battery pack according to claim 1, wherein: The device body (1) is formed with a guiding mechanism (3), and the guiding direction of the guiding mechanism (3) is parallel to the extending direction of the battery connecting terminal (2).

9. The battery pack according to claim 1, wherein: An insulating column (5) is provided inside the battery connection terminal (2), and the center line of the insulating column (5) is parallel to the center line of the battery connection terminal (2).

10. The battery pack according to claim 1, wherein: The device body (1) is provided with a plurality of mutually independent accommodating cavities (13), and the battery connecting terminals (2) are arranged in the accommodating cavities (13) in a one-to-one correspondence.

11. The battery pack according to claim 1, wherein: The battery connection terminal (2) is configured as a cylindrical structure; and a first sealing structure (6) is provided at the connection between the device body (1) and the battery pack.

12. The battery pack according to claim 1, wherein: A second sealing structure (7) is provided between the root of the battery connection terminal (2) and the device body (1).

13. The connection device suitable for a battery pack according to claim 12, wherein: The first sealing structure (6) is a sealing gasket.

14. The connection device suitable for a battery pack according to claim 12, wherein: The device body (1) is interference fit with the battery pack.

15. An electric tool comprising: Tool body; Tool connection device (400); The tool connection device (400) comprises: Device body (403); A plurality of tool connection terminals (401), arranged on the device body (403), capable of at least transmitting electrical energy; The tool connection terminal (401) is configured as a cylindrical structure; the tool connection terminal (401) is configured to withstand a maximum current of less than or equal to 400A.

16. A connection device mounted on a battery pack (200) for an electric tool (500), the connection device comprising: Device body (1); A plurality of battery connection terminals (2), capable of transmitting electric energy at least between the battery pack (200) and the electric tool (500); The device body (1) is provided with a plurality of mutually independent accommodating cavities (13), and the battery connection terminals (2) are arranged in the accommodating cavities (13) in a one-to-one correspondence.

17. The connection device according to claim 16, wherein: The battery connection terminal (2) is configured as a cylindrical structure; and a first sealing structure (6) is provided at the connection between the device body (1) and the battery pack.

18. The connection device suitable for a battery pack according to claim 17, wherein: A second sealing structure (7) is provided between the root of the battery connection terminal (2) and the device body (1).

19. The connection device suitable for a battery pack according to claim 17, wherein: The first sealing structure (6) is a sealing gasket.

20. The connection device suitable for a battery pack according to claim 17, wherein: The device body (1) is interference fit with the battery pack.

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