A terminal assembly, battery pack, and power tool system

Abstract

The application discloses a terminal assembly, a battery pack and a power tool system. The terminal assembly comprises a plurality of terminals configured to electrically connect with a contact of a matching terminal; at least one of the terminals comprises a first component configured to conduct current and a second component configured to apply pressure to the first component; a ratio of thicknesses of the first component and the second component is greater than or equal to 0.1 and less than or equal to 20; and the first component provides a face-to-face contact area for the contact, in which the first component and the contact fit with each other, so that the first component can have a large clamping force on the contact, stable power transmission can be achieved, and when the contact is inserted into the terminal, the terminal and the contact have a large contact area, the contact resistance can be effectively reduced, and continuous transmission of large current can be achieved.

Description

Technical Field

[0001] This application relates to the field of charging technology for battery packs in power tools, specifically to a terminal assembly, a battery pack, and a power tool system. Background Technology

[0002] Most current battery packs use output electrodes capable of continuous discharge of 80A. However, this 80A continuous discharge capability is insufficient to meet the discharge requirements of high-power power tools. To adapt to the amplification needs of high-power power tools, the output electrodes of existing battery packs have been improved.

[0003] However, the current terminal structure of power tools, as well as the electrical connection method of line contact between the terminals of power tools and the output plates of battery packs, cannot meet the requirements for continuous discharge of large currents.

[0004] This section provides background information related to this application, which is not necessarily prior art. Summary of the Invention

[0005] One object of this application is to solve or at least mitigate some or all of the aforementioned problems. Therefore, one object of this application is to provide a terminal assembly, battery pack, and power tool system capable of achieving continuous discharge of high current.

[0006] To achieve the above objectives, this application adopts the following technical solution:

[0007] A terminal assembly, comprising:

[0008] Multiple terminals for electrical connection with contacts that mate with the terminals; at least one terminal includes a first member and a second member, the first member being configured to conduct current and the second member being configured to apply pressure to the first member;

[0009] The thickness ratio of the first component to the second component is greater than or equal to 0.1 and less than or equal to 20; and the first component provides a face-to-face contact area for the contact, in which the first component and the contact fit together.

[0010] In some embodiments, the thickness of the first component is 0.6 mm, 0.8 mm, 0.9 mm, or 1 mm.

[0011] In some embodiments, the thickness of the second component is 0.3 mm, 0.4 mm, 0.5 mm, or 0.6 mm.

[0012] In some embodiments, the first component is made of a copper alloy; the second component is made of stainless steel.

[0013] In some embodiments, the contact area between the first component and the contact is plated with nickel, and / or the contact area between the first component and the contact is plated with silver.

[0014] In some embodiments, the contact area includes a plurality of non-connected sub-contact areas.

[0015] In some embodiments, the total area of ​​the contact region is greater than or equal to 4 mm. 2 .

[0016] In some embodiments, the area of ​​each of the sub-contact regions is greater than or equal to 0.5 mm. 2 .

[0017] A battery pack, comprising:

[0018] case;

[0019] Multiple battery cells are housed in the housing;

[0020] A power tool interface includes multiple terminals for electrical connection with contacts that mate with the terminals;

[0021] A circuit board is housed within the housing and electrically connected to the power tool interface; a controller is mounted on the circuit board.

[0022] The terminal provides a face-to-face contact area for the contact, in which the terminal and the contact mate with each other, and the controller allows the battery pack to have a maximum continuous discharge current greater than or equal to 100A.

[0023] In some embodiments, the contact area includes a plurality of non-connected sub-contact areas.

[0024] In some embodiments, the total area of ​​the contact region is greater than or equal to 4 mm. 2 .

[0025] In some embodiments, the area of ​​each of the sub-contact regions is greater than or equal to 0.5 mm. 2 .

[0026] In some embodiments, the terminal includes a first component and a second component, the first component being configured to conduct current and the second component being configured to apply pressure to the first component.

[0027] In some embodiments, the contact area is disposed on the first member.

[0028] In some embodiments, the surface of the contact area is nickel-plated, and / or the surface of the contact area is silver-plated.

[0029] An electric tool system includes: an electric tool, a first battery pack, and a second battery pack;

[0030] The power tool includes:

[0031] chassis;

[0032] The motor is housed within the housing;

[0033] The working head is configured to be driven by the motor;

[0034] The battery pack interface includes multiple contacts for connecting the battery pack to power the motor;

[0035] The first battery pack includes:

[0036] case;

[0037] Multiple battery cells are housed in the housing;

[0038] A first power tool interface includes a plurality of first terminals, the first terminals being used for electrical connection with the contacts;

[0039] The second battery pack includes:

[0040] case;

[0041] Multiple battery cells are housed in the housing;

[0042] The second power tool interface includes a plurality of second terminals, which are used for electrical connection with the contacts;

[0043] The first terminal provides a linear first contact area for the contact, and the second terminal provides a face-to-face second contact area for the contact, the width of the second contact area being greater than or equal to three times the width of the first contact area.

[0044] In some embodiments, the first contact area and the second contact area have the same height.

[0045] In some embodiments, the release date of the first battery pack is earlier than January 1, 2025, and the release date of the second battery pack is later than January 1, 2025.

[0046] In some embodiments, the second terminal includes a first component and a second component, the first component being configured to conduct current and the second component being configured to apply pressure to the first component.

[0047] In some embodiments, the thickness of the first component is 0.6 mm, 0.8 mm, 0.9 mm, or 1 mm.

[0048] In some embodiments, the thickness of the second component is 0.3 mm, 0.4 mm, 0.5 mm, or 0.6 mm.

[0049] In some embodiments, the total area of ​​the second contact region is greater than or equal to 4 mm². 2 .

[0050] In some embodiments, the surface of the second contact area is plated with nickel, and / or the surface of the second contact area is plated with silver.

[0051] In some embodiments, the maximum allowable discharge current of the power tool is greater than or equal to 100A.

[0052] In some embodiments, the power tool is a chainsaw.

[0053] The advantages of this application are as follows: By configuring a first component in the terminal for electrical connection with the contact to conduct current, and a second component configured to apply pressure to the first component, the first component can exert a large clamping force on the contact, enabling stable power transmission. By setting the ratio of the first thickness to the second thickness to be greater than or equal to 0.1 and less than or equal to 20, and by providing a face-to-face contact area for the contact with the first component, and ensuring that the first component and the contact can fit together in the contact area, a large contact area can be achieved between the terminal and the contact when the contact is inserted into the terminal, effectively reducing contact resistance and enabling continuous transmission of large currents. Attached Figure Description

[0054] Figure 1A This is a schematic diagram of the structure of a terminal provided in this application;

[0055] Figure 1B yes Figure 1A The diagram shown is a structural schematic of the terminal from a first-view perspective;

[0056] Figure 1C yes Figure 1A The diagram shows the structure of the terminal from a second perspective.

[0057] Figure 1D yes Figure 1A The diagram shown is a structural schematic of the terminal from a third-view perspective;

[0058] Figure 2A yes Figure 1A The diagram shows the structure with the terminals and contacts clamped together.

[0059] Figure 2B yes Figure 1A The diagram shows a structural schematic from another perspective when the terminal and contact are clamped together.

[0060] Figure 3AThis is a schematic diagram of another terminal structure provided in this application;

[0061] Figure 3B yes Figure 3A A schematic diagram showing the terminal and contact clamping state;

[0062] Figure 4A This is a schematic diagram of another type of terminal provided in this application;

[0063] Figure 4B yes Figure 4A The diagram shows the structure of the terminal from a first-view perspective.

[0064] Figure 4C yes Figure 4A The diagram shows the structure of the terminal from a second perspective.

[0065] Figure 5A This is a schematic diagram of another type of terminal provided in this application;

[0066] Figure 5B yes Figure 5A The diagram shows the structure of the terminal from a first-view perspective.

[0067] Figure 5C yes Figure 5A The diagram shows the structure of the terminal from a second perspective.

[0068] Figure 6A This is a schematic diagram of another type of terminal provided in this application;

[0069] Figure 6B yes Figure 6A The diagram shows the structure of the terminal from a first-view perspective.

[0070] Figure 6C yes Figure 6A The diagram shows the structure of the terminal from a second perspective.

[0071] Figure 7A This is a schematic diagram of another type of terminal provided in this application;

[0072] Figure 7B yes Figure 7A The diagram shown is a structural schematic of the terminal from a first-view perspective.

[0073] Figure 7C yes Figure 7A The diagram shown is a structural schematic of the terminal from a second perspective.

[0074] Figure 8A This is a schematic diagram of another type of terminal provided in this application;

[0075] Figure 8B yes Figure 8AThe diagram shown is a structural schematic of the terminal from a first-view perspective.

[0076] Figure 8C yes Figure 8A The diagram shown is a structural schematic of the terminal from a second perspective.

[0077] Figure 9 This is a schematic diagram of the structure of a battery pack provided in this application;

[0078] Figure 10 This is an exploded view of a battery pack provided in this application;

[0079] Figure 11 This is a system diagram of an electric tool system provided in this application;

[0080] Figure 12 This is a system diagram of another power tool system provided in this application.

[0081] Figure 13 This is a structural diagram of a power tool from another perspective;

[0082] Figure 14A This is a schematic diagram of a terminal and contact clamping state in the prior art;

[0083] Figure 14B yes Figure 14A A structural diagram from another perspective. Detailed Implementation

[0084] Before explaining any implementation of this application in detail, it should be understood that this application is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0085] In this application, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0086] In this application, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this application generally indicates that the preceding and following related objects have an "and / or" relationship.

[0087] In this application, the terms "connection," "combination," "coupling," and "installation" can 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 the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0088] In this application, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are inclusive of values ​​and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​not using relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0089] In this application, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0090] In this application, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when an element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0091] In this application, the terms "controller," "processor," "central processing unit," "CPU," and "MCU" are used interchangeably. When using the unit "controller," "processor," "central processing unit," "CPU," or "MCU" to perform a specific function, unless otherwise stated, these functions may be performed by a single or multiple of the aforementioned units.

[0092] In this application, the terms "device," "module," or "unit" are used to describe devices that can be implemented in hardware or software to perform a specific function.

[0093] In this application, the terms “calculation,” “judgment,” “control,” “determine,” “identify,” etc., refer to the operation and process of a computer system or similar electronic computing device (e.g., controller, processor, etc.).

[0094] 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 with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0095] This application provides a terminal assembly including multiple terminals. Figure 1A This is a schematic diagram of the structure of a terminal provided in this application. Figure 1B yes Figure 1A The diagram shown is a structural schematic of the terminal from a first-view perspective. Figure 1C yes Figure 1A The diagram shown is a structural schematic of the terminal from a second perspective. Figure 1D yes Figure 1A The diagram shown is a structural schematic of the terminal from a third-view perspective. Terminal 10 is used for electrical connection with the contacts of mating terminal 10. At least one terminal 10 includes a first member 11 and a second member 12. The first member 11 is configured to conduct current, and the second member 12 is configured to apply pressure to the first member 11. The thickness ratio of the first member 11 to the second member 12 is greater than or equal to 0.1 and less than or equal to 20. The first member 11 provides a face-to-face contact area A for the contact 20, in which the first member 11 and the contact 20 fit together.

[0096] Specifically, the battery pack interface in power tools can be equipped with a terminal assembly, which can include multiple terminals. These terminals are electrically connected to the terminals of the battery pack to achieve the function of power transmission. Figure 2A This is a schematic diagram of the structure with the terminal and contact held together. Figure 2BThis is a structural schematic diagram from another perspective, combined with reference, showing the terminal and contact clamping state. Figure 2A and Figure 2B Contact 20 can be a terminal of the battery pack. When electrically connecting terminal 10 and contact 20, contact 20 can be inserted into terminal 10 to achieve a plug-in connection between terminal 10 and contact 20. (Refer to reference...) Figures 1A to 1D As shown in Figure 2, terminal 10 may include a first component 11 and a second component 12. The first component 11 is a clamping member of terminal 10, used to clamp the contact 20 to achieve electrical connection with the contact 20. The second component 12 is a force-applying member of terminal 10, used to apply pressure to the first component 11 so that the first component 11 can have a large clamping force on the contact 20, so as to achieve stable power transmission.

[0097] The first component 11 has a first thickness D1, and the second component 12 has a second thickness D2. The ratio of the first thickness D1 to the second thickness D2 can be greater than or equal to 0.1 and less than or equal to 20, greater than or equal to 0.5 and less than or equal to 10, or greater than or equal to 1 and less than or equal to 5. If the second component 12 is too thin, it cannot provide sufficient pressure to the first component 11; if the second component 12 is too thick, it will take up too much space. The thickness of the first component 11 and the second component 12 can be set according to design requirements. For example, the thickness of the first component 11 and the second component 12 can be set to enable high current transmission.

[0098] For example, in some embodiments, the thickness D1 of the first component 11 can be 0.6 mm, 0.8 mm, 0.9 mm or 1 mm.

[0099] In some embodiments, the thickness D2 of the second member 12 can be 0.3 mm, 0.4 mm, 0.5 mm or 0.6 mm.

[0100] The first component 11 can provide a face-to-face contact area for the contact 20, and the first component 11 and the contact 20 are configured to fit together in the contact area A. Therefore, when the contact 20 is inserted into the terminal 10, the terminal 10 and the contact 20 can have a larger contact area, which can reduce contact resistance and facilitate the continuous transmission of large currents.

[0101] In some embodiments, the total area of ​​contact region A is greater than or equal to 4 mm². 2 This ensures a large contact area after terminal 10 and contact 20 are connected, thus meeting the requirement for continuous discharge of high current.

[0102] In some embodiments, the first component 11 is made of a copper alloy, and the second component 12 is made of stainless steel. Thus, the good conductivity of the copper alloy allows the first component 11 to have good conductivity, and the elasticity of the stainless steel allows the second component 12 to apply pressure to the first component 11, thereby giving the first component 11 a greater clamping force on the contact 20.

[0103] Figure 3A This is a schematic diagram of another terminal structure provided in this application. Figure 3B This is a schematic diagram of another terminal and contact clamping state, in conjunction with reference. Figure 3A and Figure 3B The contact area A between the first component 11 and the contact 20 is plated with nickel, and / or the contact area between the first component 11 and the contact 20 is plated with silver. Figure 3A and Figure 3B This example only illustrates the case where two plating layers are formed in the contact area A between the first component 11 and the contact 20. The first plating layer L1 can be nickel, and the second plating layer L2 can be silver; alternatively, the first layer L1 can be silver, and the second layer L2 can be nickel. In another feasible embodiment, only one plating layer can be formed in the contact area A between the first component 11 and the contact 20. This plating layer can be either nickel or silver, and this application does not specifically limit this. Furthermore, plating layers can also be formed on the periphery of the first component 11, not just in the contact area A.

[0104] refer to Figures 1A to 2B In some embodiments, the contact area A includes multiple non-connected sub-contact areas a. Figures 1A to 2B The illustration shows a case where contact area A includes two non-connected sub-contact areas a, but is not limited to this. Thus, when contact 20 is inserted into terminal 10, contact 20 can make contact with multiple sub-contact areas a to achieve electrical connection. If one sub-contact area a breaks, terminal 10 can still contact contact 20 through the other sub-contact areas a, thereby extending the service life of terminal 10.

[0105] In some embodiments, the area of ​​each sub-contact region a is greater than or equal to 0.5 mm. 2 In this way, it can be ensured that each sub-contact area a of terminal 10 has a large contact area with contact 20, which can meet the requirement of continuous discharge capability of large current.

[0106] Figure 4A This is a schematic diagram of another type of terminal provided in this application. Figure 4B yes Figure 4A The diagram shown is a structural schematic of the terminal from a first-view perspective. Figure 4C yes Figure 4A The schematic diagram of the terminal structure shown in the second view, in conjunction with the reference. Figures 4A to 4CTerminal 10 includes a first component 11 and a second component 12. The first component 11 is provided with a plurality of sub-contact areas a that contact the contact 20. The second component 12 can be used as a support substrate for the first component 11. Each sub-contact area a can be distributed circumferentially and can extend towards the center of the circle and towards the opposite side of the first component 11. When the contact is inserted into the terminal 10, each sub-contact area a on both sides can make contact with the contact, thereby transmitting current.

[0107] Figure 5A This is a schematic diagram of another type of terminal provided in this application. Figure 5B yes Figure 5A The diagram shown is a structural schematic of the terminal from a first-view perspective. Figure 5C yes Figure 5A The schematic diagram of the terminal structure shown in the second view, in conjunction with the reference. Figures 5A to 5C Terminal 10 includes a first component 11 and a second component 12. The first component 11 is provided with a plurality of sub-contact areas a that contact the contact 20. The second component 12 can also be used as a support substrate for the first component 11. The sub-contact areas a can be arranged sequentially along the length direction of terminal 10, and the sub-contact areas a can be elastic. When the contact is inserted into terminal 10, the sub-contact areas a on both sides can make contact with the contact, and because of the elastic setting, the contact will not be damaged, thereby allowing current to be transmitted.

[0108] Figure 6A This is a schematic diagram of another type of terminal provided in this application. Figure 6B yes Figure 6A The diagram shown is a structural schematic of the terminal from a first-view perspective. Figure 6C yes Figure 6A The schematic diagram of the terminal structure shown in the second view, in conjunction with the reference. Figures 6A to 6C Terminal 10 includes a first component 11 and a second component 12. The first component 11 has multiple sub-contact areas a that contact the contact 20. The second component 12 can be used as a support substrate for the first component 11. Multiple non-contacting sub-contact areas a can be provided on the contact area A of the first component 11 that contacts the contact. Along the insertion direction of the contact, each sub-contact area a can be provided with a bending structure, which enables the sub-contact area a to be elastic. When the contact is inserted into the sub-contact area a, the contact makes contact with each sub-contact area a and compresses each sub-contact area a, which can ensure good contact while avoiding damage to the sub-contact areas a and the contact.

[0109] Figure 7A This is a schematic diagram of another type of terminal provided in this application. Figure 7B yes Figure 7A The diagram shown is a structural schematic of the terminal from a first-view perspective. Figure 7C yes Figure 7AThe diagram shown is a structural schematic of the terminal from a second-view perspective, in conjunction with reference. Figure 7A and Figure 7C In some embodiments, terminal 10 may further include a third component 13. When contact 20 is inserted into terminal 10, contact 20 can be clamped together by the first component 11 and the third component 13, which can further increase the contact area between terminal 10 and contact 20, which is beneficial to reduce contact resistance and improve overcurrent capability. Furthermore, when terminal 10 includes the first component 11, the second component 12, and the third component 13, the contact area A between the first component 11 and the contact can also include multiple unconnected sub-contact areas a, and the contact area B between the third component 13 and the contact can also include multiple unconnected sub-contact areas. In this way, both the first component 11 and the third component 13 can achieve surface contact with the contact, which can further improve the overcurrent capability.

[0110] Figure 8A This is a schematic diagram of another type of terminal provided in this application. Figure 8B yes Figure 8A The diagram shown is a structural schematic of the terminal from a first-view perspective. Figure 8C yes Figure 8A The diagram shown is a structural schematic of the terminal from a second-view perspective, in conjunction with reference. Figure 8A and Figure 8C Terminal 10 includes a first component 11, a second component 12, and a third component 13. The second component 12 provides a support substrate for the first component 11, and the third component 13 applies pressure to the first component 11, enabling the second component 12 to apply pressure to the first component 11. The first component 11 provides a face-to-face contact area for the contacts, and the contact area may include multiple non-connected sub-contact areas a. Along the insertion direction of the contacts, each sub-contact area a may be provided with a bending structure, enabling the sub-contact area a to be elastic. When the contacts are inserted into the sub-contact areas a, the contacts contact each sub-contact area a and compress each sub-contact area a, ensuring good contact while preventing damage to the sub-contact areas a and the contacts.

[0111] In some embodiments, the third component 13 may be made of a copper alloy with good electrical conductivity.

[0112] In some embodiments, the contact area between the third component 13 and the contact 20 can also be plated with nickel and / or silver to achieve good conductivity and protect the body of the third component 13.

[0113] The terminal assembly provided in this application includes multiple terminals. A first component in each terminal is configured to electrically connect with a contact to conduct current. A second component is configured to apply pressure to the first component, enabling the first component to exert a large clamping force on the contact and thus ensuring stable power transmission. By setting the ratio of the first thickness to the second thickness to be greater than or equal to 0.1 and less than or equal to 20, and by providing a face-to-face contact area between the first component and the contact, allowing the first component and the contact to fit together in the contact area, a large contact area is achieved when the contact is inserted into the terminal. This effectively reduces contact resistance and enables continuous transmission of high current.

[0114] Based on the same inventive concept, this application also provides a battery pack. Figure 9 This is a schematic diagram of the structure of a battery pack provided in this application. Figure 10 This is an exploded view of a battery pack provided in this application, in conjunction with reference to [reference needed]. Figure 10 and Figure 11 The battery pack 100 includes: a housing 101; a plurality of battery cells 102 housed in the housing 101; a power tool interface 103 including a plurality of terminals 10, the terminals 10 being used for electrical connection with the contacts of mating terminals 10; and a circuit board 104 housed in the housing 101 and electrically connected to the power tool interface 103, the circuit board 104 having a controller 105 disposed thereon.

[0115] The housing 101 provides support and protection for the battery cell 102, which in turn provides electrical energy. The battery cell 102 is electrically connected to the power tool's battery pack interface via the power tool interface 103, allowing the battery pack 100 to supply power to the power tool's motor, ensuring normal operation. The circuit board 104 may house integrated circuits and a controller 105 for controlling the charging and discharging processes of the battery pack 100. For example, the battery pack 100 can be a lithium battery, a nickel-cadmium battery, or a nickel-metal hydride battery. Of course, the battery pack 100 can also be other types of rechargeable batteries, as long as they can provide power to the power tool; further examples are not provided here.

[0116] The power tool interface 103 may be provided with terminals 10 provided in any embodiment of this application, in conjunction with reference to the reference. Figures 1A to 8C Terminal 10 provides a face-to-face contact area A for contact 20, in which terminal 10 and contact 20 fit together, and controller 105 allows the maximum continuous discharge current of battery pack 100 to be greater than or equal to 100A.

[0117] In some embodiments, the total area of ​​the contact region is greater than or equal to 4 mm². 2 .

[0118] In some embodiments, contact area A includes a plurality of non-connected sub-contact areas a.

[0119] In some embodiments, the area of ​​each sub-contact region a is greater than or equal to 0.5 mm. 2 .

[0120] In some embodiments, terminal 10 includes a first component 11 and a second component 12, the first component 11 being configured to conduct current and the second component 12 being configured to apply pressure to the first component 11.

[0121] In some embodiments, contact area A is disposed on the first member 11.

[0122] In some embodiments, the surface of contact area A is plated with nickel, and / or the surface of contact area A is plated with silver.

[0123] The battery pack provided in this application includes a power tool interface with terminals. By setting the terminals to provide face-to-face contact areas for the contacts, and the terminals and contacts can fit together in the contact areas, the terminals and contacts can have a large contact area when the contacts are inserted into the terminals, which can effectively reduce the contact resistance and thus achieve continuous transmission of a large current of 100A.

[0124] Based on the same inventive concept, this application also provides an electric tool system. Figure 11 This is a system diagram of a power tool system provided in this application, such as... Figure 11 As shown, the power tool system 1000 includes power tools, a first battery pack 300, and a second battery pack 100. The power tools can be a ride-on lawnmower 200a, an electric drill 200b, a chainsaw 200c, a handheld lawnmower 200d, and 200e. The first battery pack 300 and the second battery pack 100 can provide electrical power to the aforementioned power tools.

[0125] To facilitate understanding, the following section will use a chainsaw as an example to provide a detailed introduction to the power tools and related technical solutions of this application.

[0126] Figure 12 This is a system diagram of another power tool system provided in this application, specifically a system diagram of a chainsaw as a power tool. Figure 13 This is a structural diagram of a power tool from another perspective, in conjunction with reference. Figure 12 and Figure 13The power tool 200 includes a housing 201 and a motor 202 housed within the housing 201. The housing 201 provides support and protection for the motor 202. The power tool 200 also includes a working head 203 configured to be driven by the motor 202. When the power tool 200 is a chainsaw, the working head 203 is a chain capable of performing cutting functions under the drive of the motor 202. The power tool 200 also includes a battery pack interface 204, including multiple contacts 20 for connecting a battery pack to power the motor 202.

[0127] A first battery pack 300 is commercially available and includes: a housing 301; multiple battery cells (not shown) housed in the housing 301; and a first power tool interface 302 including multiple first terminals. The first terminals are used for electrical connection with contacts. Figure 14A This is a schematic diagram of a prior art structure for clamping terminals and contacts. Figure 14B yes Figure 14A Another structural diagram from a different perspective, see reference. Figure 14A and Figure 14B In the prior art, the first terminal 302 provides a linear first contact area C for the contact 20.

[0128] The second battery pack can be any of the battery pack 100 provided in the foregoing embodiments of this application, including: a housing 101; a plurality of battery cells 102 housed in the housing 101; and a second power tool interface 103 including a plurality of second terminals 10, the second terminals 10 being used for electrical connection with contacts 20. (Referring to the reference...) Figures 1A to 8C as well as Figure 14A and Figure 14B The second terminal 10 provides a second contact area A facing each other for the contact 20. The width H1 of the second contact area A is greater than or equal to three times the width H3 of the first contact area C.

[0129] Specifically, the battery pack interface 204 of the power tool 200 can be adapted to the first battery pack 300 and the second battery pack 100. The first terminal 302 of the first battery pack 300 can provide a linear first contact area C with the contact 20 of the battery pack interface 204, enabling the first terminal 302 to make line contact with the contact 20. The line contact connection results in a small contact area, which is not conducive to achieving continuous high current carrying capacity. The second terminal 10 of the second battery pack 100 provides a face-to-face second contact area A for the contact 20, which enables the second terminal 10 to have a larger contact area for the contact 20, reduces contact resistance, and is conducive to achieving continuous high current transmission. In particular, by setting the width H1 of the second contact area A to be greater than or equal to three times the width H3 of the first contact area C, it can be ensured that the second terminal 10 has a sufficiently large contact area for the contact 20, which can further improve the current carrying capacity.

[0130] In some embodiments, the height H2 of the first contact area C and the second contact area A1 is the same. When the width H1 of the second contact area A is greater than or equal to three times the width H3 of the first contact area C, the height of the first contact area C and the height H2 of the second contact area A1 are made the same, ensuring that the contact area of ​​the second terminal 10 as the contact 20 is greater than the contact area between the first terminal and the contact, thus ensuring that the second battery pack 100 can have a larger continuous discharge current.

[0131] In some embodiments, the release date of the first battery pack is earlier than January 1, 2025, and the release date of the second battery pack 100 is later than January 1, 2025.

[0132] In some embodiments, the second terminal 10 includes a first component 11 and a second component 12, the first component 11 being configured to conduct current and the second component 12 being configured to apply pressure to the first component 11.

[0133] In some embodiments, the thickness of the first member 11 is 0.6 mm, 0.8 mm, 0.9 mm or 1 mm.

[0134] In some embodiments, the thickness of the second member 12 is 0.3 mm, 0.4 mm, 0.5 mm, or 0.6 mm.

[0135] In some embodiments, the total area of ​​the second contact region A is greater than or equal to 4 mm². 2 .

[0136] In some embodiments, the surface of the second contact area A is plated with nickel, and / or the surface of the second contact area A is plated with silver.

[0137] In some embodiments, the maximum allowable discharge current of the power tool 200 is greater than or equal to 100A.

[0138] The power tool system provided in this application allows the power tool to be adapted to a first battery pack and a second battery pack. The first terminal of the first battery pack provides a linear first contact area with the contacts of the battery pack interface in the power tool, enabling line contact between the first terminal and the contacts and allowing for continuous transmission of a small current between the first battery pack and the power tool. The second terminal of the second battery pack provides a face-to-face second contact area with the contacts of the battery pack interface in the power tool, resulting in a larger contact area and reduced contact resistance, allowing for continuous transmission of a larger current between the second battery pack and the power tool. Furthermore, by setting the width of the second contact area to be greater than or equal to three times the width of the first contact area, the current transmission capacity of the second battery pack is greater than that of the first battery pack, making the power tool highly compatible with both new and old battery packs.

[0139] The foregoing has shown and described 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 way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of this application.

Claims

1. A terminal assembly, comprising: Multiple terminals, the terminals being used for electrical connection with contacts that match the terminals; At least one of the terminals includes a first component and a second component, the first component being configured to conduct current and the second component being configured to apply pressure to the first component; The feature is that the thickness ratio of the first component to the second component is greater than or equal to 0.1 and less than or equal to 20; and the first component provides a face-to-face contact area for the contact, wherein the first component and the contact fit together in the contact area.

2. The terminal assembly according to claim 1, characterized in that, The thickness of the first component is 0.6mm, 0.8mm, 0.9mm or 1mm; the thickness of the second component is 0.3mm, 0.4mm, 0.5mm or 0.6mm.

3. The terminal assembly according to claim 1, characterized in that, The first component is made of copper alloy; the second component is made of stainless steel.

4. The terminal assembly according to claim 1, characterized in that, The contact area between the first component and the contact is plated with nickel, and / or the contact area between the first component and the contact is plated with silver.

5. The terminal assembly according to claim 1, characterized in that, The contact area includes multiple non-contiguous sub-contact areas, each of which has an area greater than or equal to 0.5 mm². 2 .

6. The terminal assembly according to claim 1, characterized in that, The total area of ​​the contact region is greater than or equal to 4 mm. 2 .

7. A battery pack, comprising: case; Multiple battery cells are housed in the housing; A power tool interface includes multiple terminals for electrical connection with contacts that mate with the terminals; A circuit board is housed within the housing and electrically connected to the power tool interface; a controller is mounted on the circuit board. The characteristic feature is that the terminal provides a face-to-face contact area for the contact, in which the terminal and the contact fit together, and the controller allows the maximum continuous discharge current of the battery pack to be greater than or equal to 100A.

8. A power tool system, comprising: Power tools, first battery pack and second battery pack; The power tool includes: chassis; The motor is housed within the housing; The working head is configured to be driven by the motor; The battery pack interface includes multiple contacts for connecting the battery pack to power the motor; The first battery pack includes: case; Multiple battery cells are housed in the housing; A first power tool interface includes a plurality of first terminals, the first terminals being used for electrical connection with the contacts; The second battery pack includes: case; Multiple battery cells are housed in the housing; The second power tool interface includes a plurality of second terminals, which are used for electrical connection with the contacts; The feature is that the first terminal provides a linear first contact area for the contact, and the second terminal provides a face-to-face second contact area for the contact, wherein the width of the second contact area is greater than or equal to three times the width of the first contact area.

9. The power tool system according to claim 8, characterized in that, The first contact area and the second contact area have the same height.

10. The power tool system according to claim 8, characterized in that, The first battery pack will be released before January 1, 2025, and the second battery pack will be released after January 1, 2025.

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