Battery pack and power tool

Abstract

A battery pack and a power tool. The battery pack comprises: a housing (1); a battery holder (10), which is accommodated inside the housing (1) and is fixedly connected to the housing (1); battery cells (101), which are at least partially fixed on the battery holder (10); a limiting portion (110), which is formed at an end portion of one end of the housing (1) and is provided with an operation hole (13); a connecting portion (2), which is formed on the housing (1) and is provided with a locking hole (26); an operation member (131), which is provided in the operation hole (13) in a sliding manner; and a locking member (2), which is provided in the locking hole (26) in a sliding manner and is linked to the operation member (131), a gathering surface (52) being provided on the side of the locking member (2) facing the limiting portion (110).

Description

Battery packs and power tools

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on September 18, 2023 with application number 202311204604.3, and the priority to the Chinese patent application filed with the China Patent Office on September 18, 2023 with application number 202322530811.X, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of tool technology, for example, to a battery pack and a power tool. Background Art

[0003] With the development of the tool industry, electric tools have emerged that use motor-driven transmission mechanisms to drive the working head. With the development of battery technology, AC tools are gradually developing towards lithium batteries and lightweight.

[0004] In related art, Chinese patent application number CN00101932.5 discloses a power tool comprising a tool housing with a rail-and-groove structure for removably mounting a rechargeable battery pack. A locking mechanism including a pressure member is located within the housing. The tool housing includes a frame portion adjacent to the rail-and-groove structure, which includes a recessed portion. The pressure member and its associated spring are introduced into the recessed portion from its open side. An operating member is mounted perpendicular to the recessed portion, with one arm accessible and the other arm engaging the pressure member, enabling displacement from a locked position.

[0005] However, when the battery pack needs to be connected to a power tool, the lock tongue on the battery pack is easily worn out, resulting in locking failure, so there is room for improvement.

[0006] Summary of the Invention

[0007] The present application provides a battery pack and a power tool to solve the problem of easy wear of the lock tongue.

[0008] An embodiment of the present application provides a battery pack, comprising:

[0009] shell;

[0010] a battery holder, housed in the housing and fixedly connected to the housing;

[0011] a battery cell, at least partially fixed to the battery holder;

[0012] a limiting portion formed at one end of the housing and provided with an operating hole;

[0013] a connecting portion formed on the housing and provided with a locking hole;

[0014] an operating member, slidably connected to the operating hole;

[0015] A locking member is slidably connected in the locking hole and linked to the operating member; a gathering surface is provided on one side of the locking member facing the limiting portion.

[0016] The present application also provides a power tool, including:

[0017] accommodating portion;

[0018] a motor, housed in the accommodation portion and having an output shaft;

[0019] A handle portion, one end of which is connected to the receiving portion, and the other end of which is formed with a sole, wherein the sole is configured to be connected to the battery pack according to any one of claims 1 to 9;

[0020] The sole is formed with a lock hole for inserting a locking piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG1 is a schematic structural diagram of the connection between a battery pack and a power tool in one embodiment of the present application;

[0022] FIG2 is a schematic diagram of an exploded structure of a battery pack in one embodiment of the present application;

[0023] FIG3 is a schematic top view of a battery pack in one embodiment of the present application;

[0024] FIG4 is a schematic cross-sectional view of a battery pack at a partition groove in one embodiment of the present application;

[0025] FIG5 is a bottom schematic diagram of a connector of a battery pack in one embodiment of the present application;

[0026] FIG6 is a schematic cross-sectional view of a connector of a battery pack in one embodiment of the present application;

[0027] FIG7 is an enlarged schematic diagram of the structure at point A in FIG2 .

[0028] Description of the drawings: 1. Shell; 10. Bracket; 101. Cell; 102. Circuit board; 103. Support; 104. Protrusion; 105. Limiting member; 1051. Wire groove; 1052. Diameter expansion portion; 11. Upper shell; 110. Limiting member; 111. Guide groove; 112. Positioning groove; 12. Lower shell; 120. Rubber coating; 121. Light guide column; 122. Button cap; 13. Operation hole; 131. Operation member; 1311. Accommodation portion; 1312. Insert board; 14. Slot; 2. Connecting portion; 21. Terminal slot; 22. Communication terminal slot; 23. Guide rail; 231. Sliding space; 232. Abutment portion; 24. Enlarged portion; 241. Guide surface; 25. Support groove; 2 6. Locking hole; 231. Positioning part; 3. Blocking groove; 31. Closing plate; 32. Guide surface; 4. Connecting member; 41. Elastic member; 42. Support member; 421. Supporting vertical surface; 43. Positioning member; 431. Positioning vertical surface; 5. Locking member; 51. Yielding part; 52. Gathering surface; 521. Notch part; 53. Contact part; 6. Protruding part; 7. Light board; 71. Operation button; 72. Positioning notch; 8. Clamping plate; 81. Stopping part; 811. Stopping plane; 812. Guide part; 9. Power tool; 91. Accommodating part; 92. Handle part; 93. Sole of foot; 931. Blocking member; 94. Slide groove; 941. Extension part; 942. Support part; 9421. Support part; 95. Locking hole. DETAILED DESCRIPTION

[0029] The specific embodiments of the present application are described below with reference to the accompanying drawings. The following description sets forth many details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the embodiments disclosed below.

[0030] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise expressly specified.

[0032] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. A person of ordinary skill in the art will be able to understand the meaning of the above terms in this application according to the circumstances.

[0033] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0034] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0035] Referring to Figures 1 and 2, Figure 1 shows a schematic structural diagram of the connection between the battery pack and the power tool in an embodiment of the present application, and Figure 2 shows a schematic structural diagram of the explosion of the battery pack in an embodiment of the present application. The battery pack provided in an embodiment of the present application is configured to be connected to a power tool 9, and includes a housing 1, a bracket 10 and a battery cell 101. The bracket 10 is housed in the housing 1, and the battery cell 101 can be at least partially fixed to the bracket 10.

[0036] The present application also discloses a power tool 9 that is compatible with a battery pack. The power tool 9 includes at least a housing 91, a motor, and a handle 92. The housing 91 is configured to accommodate the motor, which has an output shaft. The output shaft may be connected to a transmission mechanism and configured to output power, or the power may be output directly by the motor. One end of the handle 92 is connected to the housing 91. The connection here may be integrally formed or may be installed in other ways. The other end of the handle 92 is formed with a foot 93 that is compatible with the battery pack, thereby obtaining electrical energy from the battery pack to drive the motor to rotate.

[0037] The housing 1 may include an upper shell 11 and a lower shell 12, which are connected by bolts. The upper shell 11 and the lower shell 12 may be made of an insulating material such as resin or plastic. The upper shell 11 and the lower shell 12 may form a rectangular parallelepiped. The bottom of the lower shell 12 is covered with a rubber coating 120. The rubber coating 120 covers the bottom surface of the lower shell 12 and bends upward to cover at least part of the surrounding walls of the lower shell 12. The upper shell 11 and the lower shell 12 are hollow inside to form a cavity configured to accommodate the bracket 10 and the battery cell 101. One end of the upper shell 11 protrudes upward to form a limiting portion 110. The upper surface of the upper shell 11 protrudes to form a connecting portion 2. One end of the connecting portion 2 may be integrally formed with the limiting portion 110. When the battery pack is connected to the power tool 9, the limiting portion 110 can limit the position of the battery pack moving along the length direction of the connecting portion 2.

[0038] A wiring terminal slot 21 and a communication terminal slot 22 are formed along the length of the upper shell 11 at the end of the connecting portion 2 away from the limiting portion 110. Both the wiring terminal slot 21 and the communication terminal slot 22 extend along the length of the upper shell 11 and are arranged along the width. Both the wiring terminal slot 21 and the communication terminal slot 22 extend from the top wall of the connecting portion 2 into the cavity formed by the upper shell 11 and the lower shell 12 and extend to the end wall of the connecting portion 2 away from the limiting portion 110 in the length direction. As a result, the wiring terminal slot 21 and the communication terminal slot 22 open on the top wall of the connecting portion 2 and on the end wall at one end in the length direction.

[0039] A circuit board 102 can be mounted on the top of the bracket 10. Chips and other components configured to control and detect the battery cells 101 are connected to the circuit board 102. Wiring terminals can also be mounted on the circuit board 102. The wiring terminals protrude from the surface of the circuit board 102 and can be embedded in the connector 2. The wiring terminals can include a power female terminal and a communication female terminal. Two wiring terminal slots 21 can be provided, located on the outer sides of the width of the upper shell 11; two communication terminal slots 22 can be provided, located on either side of the centerline of the width of the upper shell 11 and can be located between the two communication terminal slots 22. The wiring terminal slot 21 is configured to accommodate a female terminal, while the communication terminal slot 22 is configured to accommodate a female terminal. Male communication terminals and male communication terminals are mounted on the foot 93. The male terminal passes through the wiring terminal slot 21 and plugs into the female terminal. The male communication terminal passes through the communication terminal slot 22 and plugs into the female terminal, enabling the battery pack to power and communicate with the power tool 9.

[0040] The upper housing 11 defines a blocking slot 3, the centerline of which may be coplanar with the widthwise centerline of the upper housing 11. A blocking member 931 is formed on the sole 93 of the power tool 9, which is connected to the battery pack, at the blocking slot 3. The blocking member 931 is inserted into the blocking slot 3 to provide positioning and / or isolation.

[0041] Referring to Figures 2 and 3, Figure 3 shows a schematic top view of a battery pack in one embodiment of the present application. In some embodiments, the length L1 of the blocking slot 3 can be longer than half the length L2 of the communication terminal slot 22. It is understood that the length of the blocking slot 3 can also be other lengths, as long as it can block the two communication terminals and reduce the impact between the two communication terminals. The distance between the blocking slot 3 and the two communication terminal slots 22 can be equal or different; to facilitate the arrangement of the position of the communication female terminal, the distance between the blocking slot 3 and the two communication terminal slots 22 in the embodiment of the present application is equal.

[0042] In some embodiments, the distance d1 between the center line of the blocking slot 3 and the center line of the communication terminal slot 22 is greater than 6 mm, and can be optionally 6.25 mm; the distance d0 between the center line of the communication terminal slot 22 and the center line of the wiring terminal slot 21 is smaller than the distance d2 between the center lines of two adjacent communication terminal slots 22, thereby reducing the mutual influence between the communication terminals.

[0043] Referring to Figures 1 and 3, in some embodiments, a closing plate 31 can be formed between the bottom wall and side walls of the barrier groove 3 and the cavity formed by the upper and lower shells 12. The setting of the closing plate 31 ensures that the top wall of the barrier groove 3 at the connecting portion 2 or the end wall of the barrier groove 3 in the longitudinal direction are not connected to the interior of the cavity formed by the upper shell 11 and the lower shell 12.

[0044] In some embodiments, the height of the blocking member 931 is greater than half the height of the blocking groove 3. It can be understood that the height of the blocking groove 3 can also be equal to the height of the blocking groove 3, as long as the clamping feet of the two communication terminals can be blocked to reduce the impact between the two communication terminals.

[0045] In some embodiments, a guide surface 32 is formed at the opening and the top of the blocking groove 3 , and the guide surface 32 is inclined toward the center of the blocking groove 3 so that the blocking member 931 can be inserted into the blocking groove 3 .

[0046] In some embodiments, the barrier 931 may be made of a magnetic-isolating material and / or the inner wall of the barrier slot 3 may be embedded with magnetic-isolating material. The magnetic-isolating material can effectively shield signals, thereby reducing communication interference between the two communicating female terminals. Alternatively, the magnetic-isolating material can be embedded in the barrier 931 and / or the barrier slot 3, or can be made entirely of magnetic-isolating material, or even coated on the barrier 931 and / or the barrier slot 3, as long as the interference between the two communicating female terminals is eliminated.

[0047] In some embodiments, the barrier 931 can be made of a metal material and / or the inner wall of the barrier groove 3 can be embedded with a conductive metal material. The metal material can effectively shield the signal, thereby playing the role of communication isolation and reducing the impact between the two communication mother terminals. When the barrier groove 3 is used for communication isolation, the barrier 931 and the barrier groove 3 extend the distance between the two communication mother terminals, thereby reducing the impact between the two communication terminals. Optionally, the metal material can be embedded in the barrier 931 and / or the barrier groove 3, or it can be made entirely of a metal material, or even the metal material can be coated on the barrier 931 and / or the barrier groove 3, as long as it can eliminate the impact between the two communication mother terminals.

[0048] Referring to Figures 1 and 2, a guide rail 23 may be formed on the top sidewall of the connecting portion 2. A guide rail 23 may be formed on each sidewall of the connecting portion 2 in the width direction. The guide rail 23 may be integrally formed with the connecting portion 2 or mounted on the connecting portion 2. A sliding space 231 may be formed between the guide rail 23 and the upper housing 11. A slide groove 94 adapted to the guide rail 23 may be formed at the sole 93 of the power tool 9 that is mated with the battery pack. The slide groove 94 may extend from the mating point of the sole 93 with the battery pack toward the battery pack to form an extension portion 941. The extension portion 941 may be bent toward the connecting portion 2 of the battery pack to form a support portion 942. The sliding space 231 may be configured to accommodate the support portion 942 and to limit the support portion 942 from sliding within the sliding space 231. The connecting portion 2 is located below the guide rail 23 and can be integrally formed with an abutment portion 232 at one end close to the limiting portion 110. When the battery pack is matched with the power tool 9, the abutment portion 232 can abut the corresponding position of the power tool 9, thereby limiting the position of the battery pack sliding relative to the power tool 9.

[0049] In some embodiments, an expansion portion 24 may be formed at one end of the connecting portion 2 located below the guide rail 23 and near the limiting portion 110. The expansion portion 24 may be integrally formed with the side wall of the connecting portion 2. A guide surface 241 is formed between the expansion portion 24 and the side wall of the connecting portion 2. The guide surface 241 may be a curved surface or an inclined surface, as long as it can provide a guiding transition.

[0050] Referring to Figures 2 and 4, Figure 4 shows a schematic structural cross-sectional view of the partition groove of the battery pack in an embodiment of the present application. In some embodiments, the height h1 between the expansion portion 24 and the side wall of the connecting portion 2 is at least 0.5 mm. In the embodiment of the present application, the height between the expansion portion 24 and the side wall of the connecting portion 2 is 1 mm. Of course, it can be understood that other values ​​can also be selected for the height as long as the support portion 942 can be clamped.

[0051] In some embodiments, the distance between the two support portions 942 is less than or equal to the distance between the two expansion portions 24, and greater than or equal to the distance between the side walls of the connecting portion 2; when the support portion 942 of the power tool 9 contacts the side wall of the connecting portion 2, the support portion 942 can smoothly transition to the expansion portion 24 under the guidance of the guide surface 241, thereby forming a sense of frustration and / or facilitating the support portion 942 to clamp the expansion portion 24 to facilitate fixation of the battery pack.

[0052] In some embodiments, a support groove 25 is provided at one end of the side wall of the connecting portion 2 away from the abutment portion 232, and a support portion 9421 may be formed on the side wall of the supporting portion 942 facing the connecting portion 2. The support portion 9421 may be integrally formed with the support portion 942. The support portion 9421 can be inserted into the support groove 25 when the battery pack is mated with the power tool 9, that is, when the support portion 942 is inserted into the sliding space 231. When the guide rail 23 and the slide groove 94 wear, the support portion 9421 and the support groove 25 cooperate with each other, thereby improving the stability of the mating of the battery pack and the power tool 9 when the guide rail 23 wears.

[0053] In some embodiments, the terminal slot 21 can be located at a position away from the center line of the communication terminal slot 22 in the width direction of the upper shell 11, that is, the terminal slot 21 is closer to the outer edge of the support portion 942 in the width direction than the communication terminal slot 22. The distance d3 between the center line of the terminal slot 21 and the side wall of the connecting portion 2 is greater than or equal to 6 mm. In the embodiment of the present application, the distance between the center line of the terminal slot 21 and the side wall of the connecting portion 2 is 7.75 mm. Under the premise of the support slot 25, the distance d4 between the outer wall of the connecting portion 2 and the center line of the terminal slot 21 is at least 6.5 mm. In the embodiment of the present application, the distance between the center line of the terminal slot 21 and the side wall of the connecting portion 2 is at least 6.75 mm.

[0054] In some embodiments, the minimum value x1 of the thickness between the inner wall and the outer wall of the connecting part 2 is 2.5 mm, and in the embodiment of the present application it is 2.7 mm; under the premise of having a support groove 25, the minimum value x2 between the inner wall and the outer wall of the connecting part 2 is 1.5 mm, and in the embodiment of the present application it can be optionally 1.72 mm, maintaining the wall thickness of the connecting part 2, thereby maintaining the strength of the connecting part 2.

[0055] Referring to Figures 1 and 4, in some embodiments, the length L3 of the support groove 25 is at least 15 mm, the width W1 is at least 0.5 mm, and the height h2 is at least 1 mm; in the embodiment of the present application, the length of the support groove 25 is 30 mm, the width is 1 mm, and the height is 2.5 mm, thereby facilitating the improvement of the stability of the support groove 25 and the support portion 9421.

[0056] In some embodiments, the support groove 25 can be located at the connection between the connecting part 2 and the upper shell 11, that is, the bottom end of the space formed by the guide rail 23 and the top wall of the upper shell 11. Optionally, the support groove 25 can also extend from the top wall of the upper shell 11 to the guide rail 23 and the connecting part 2, that is, the support groove 25 and the side wall of the connecting part 2 form a stepped shape, thereby facilitating the battery pack to be mounted on the sole 93 of the power tool 9.

[0057] In some embodiments, an insulating sleeve is provided on the outer side of the female terminal, and a gap is reserved between the insulating sleeve and the inner wall of the connecting portion 2. The size of the gap is greater than or equal to 0.5 mm. The gap size in the embodiment of the present application is 0.6 mm-0.8 mm.

[0058] In some embodiments, the length L3 of the support groove 25 is greater than or equal to half of the distance d5 from the end wall of the connecting portion 2 close to the terminal groove 21 to the expanded portion 24. In an embodiment of the present application, the length of the support groove 25 is equal to half of the distance from the end wall of the connecting portion 2 close to the terminal groove 21 to the expanded portion 24.

[0059] Referring to Figures 2 and 3, an operating hole 13 is formed on the limiting portion 110, and the operating hole 13 passes through the upper shell 11 along the height direction of the upper shell 11. An operating member 131 is slidably connected in the operating hole 13, and a locking hole 26 is formed at one end of the connecting portion 2 close to the limiting portion 110. The operating member 131 is embedded in the bottom of the upper shell 11 to form a connecting member 4, and a locking member 5 can be integrally formed at the end of the connecting member 4 away from the operating member 131.

[0060] Referring to Figures 1 and 2 , an elastic member 41 is mounted below the connector 4 and between the circuit board 102. This elastic member 41 can be a spring, which pushes the operating member 131 into the operating hole 13 and the locking member 5 into the locking hole 26. A locking hole 95 is defined on the sole 93 of the power tool 9 at the corresponding position of the locking member 5. The locking member 5 can be inserted into the locking hole 95 to secure the battery pack in position along its length.

[0061] Referring to Figures 2 and 3 , in some embodiments, a relief portion 51 is formed on the side of the locking member 5 facing away from the limiting portion 110. The relief portion 51 can be an arcuate surface or an inclined surface, as long as it can push the locking member 5 downward when pressed against the relief portion 51. When pressed against the relief surface, the locking member 5 compresses the elastic member 41 and enters the upper housing 11. When the locking member 5 moves to the locking hole 95, the elastic member 41 automatically pops out and locks the locking member.

[0062] Referring to Figures 2 and 5, Figure 5 shows a schematic diagram of the bottom of the connector of the battery pack in an embodiment of the present application. In some embodiments, the elastic member 41 can be located at the bottom of the operating member 131 to facilitate better pressing of the operating member 131 to drive the locking member 5. The bottom of the operating member 131 can be formed with a receiving portion 1311, which is configured to support the elastic member 41. The receiving portion 1311 can be a protrusion for the elastic member 41 to be sleeved, or it can be a tubular groove for the elastic member 41 to be inserted. It can be understood by those skilled in the art that the receiving portion 1311 can be any equivalent way of providing support for the elastic member 41. In the embodiment of the present application, the receiving portion 1311 is a tubular groove.

[0063] Referring to Figures 2 and 3 , in some embodiments, the side of the locking member 5 facing the stopper 110 is a vertical surface, and the side of the locking member 5 facing away from the yielding surface is provided with a convergence surface 52. The convergence surface 52 can be arc-shaped, meaning that the locking member 5 can be arc-shaped along its length. That is, when viewed from the top of the locking member 5 downward, one side of the locking member 5 is arc-shaped, with an arc length of at least 15 degrees, and in this embodiment, the arc length range is 19 degrees. The radius of the arc length is at least 95 mm, and in this embodiment, the radius R can be 103 mm. The convergence surface 52 can also be an isosceles triangle. The convergence surface 52 provides a larger contact area than a flat surface, thereby more stably securing the battery pack to the power tool 9. Furthermore, the convergence surface 52 increases the contact area between the locking member 5 and the locking hole 95, while generating a convergence force toward the center of the length of the locking member 5, thereby reducing the deflection of the battery pack across its width. And / or, the arcuate surface increases the contact area between the locking member 5 and the lock hole 95, and can play a buffering role when the battery pack is subjected to impact in the length direction.

[0064] In some embodiments, the protruding height h3 of the gathering surface 52 is greater than or equal to 0.5 mm and less than or equal to 2.0 mm. If the protruding height of the gathering surface 52 is too small, it will not provide a gathering or cushioning effect. If the protruding height is too large, it will not facilitate demolding. In the embodiment of the present application, the protruding height of the gathering surface 52 can be selected to be 1.55 mm.

[0065] In some embodiments, the dimension d6 of the locking member 5 along the width direction of the connecting portion 2 is at least 30 mm. The dimension of the locking member 5 along the width direction of the connecting portion 2 can provide a basis for the contact area, which can be selected as 33 mm in the embodiment of the present application.

[0066] In some embodiments, a notch 521 may be provided at the midpoint of the gathering surface 52, and the minimum width W2 of the notch 521 may be 0.5 mm, which may be optionally 1 mm in the embodiment of the present application. The outer shell 1 of the power tool 9 may be formed by two half shells fixed by bolts. During the production process, burrs may be generated on the edges of the half shells. The provision of the notch 521 can provide a certain avoidance space for the burrs and / or release the stress on the entire gathering surface 52.

[0067] In the embodiment of the present application, by providing a gathering surface on the locking member, the contact area between the locking member and the power tool is increased when they are matched, and the wear of the locking member when locking the battery pack is reduced.

[0068] In some embodiments, a contact portion 53 may be formed on the top of the locking member 5, and the contact portion 53 may be a plane; the top wall of the locking hole 95 facing the battery pack may be a plane, and the contact portion 53 contacts the plane under the action of the elastic member 41, thereby increasing the contact area between the locking member 5 and the locking hole 95, making it easier to lock the battery pack and / or reducing the sinking of one side of the locking member 5.

[0069] Referring to Figures 3 and 5, in some embodiments, the locking hole 26 can be loosely fitted with the locking member 5 to facilitate smooth sliding of the locking member 5. A positioning portion 231 is provided on the inner wall of the locking hole 26, projecting toward the center. The positioning portion 231 is provided on the sidewalls other than the sidewall opposite the convergence surface 52. Two positioning portions 231 can be provided on each sidewall. Each positioning portion 231 can be a rib integrally formed on the inner wall of the locking hole 26, thereby facilitating positioning of the locking member 5 while reducing potential jamming during sliding of the locking member 5. Of course, three positioning portions can also be provided to achieve uniform force distribution, as will be understood by those skilled in the art.

[0070] Referring to Figures 5 and 6, Figure 6 shows a cross-sectional schematic diagram of the connector of the battery pack in an embodiment of the present application. In some embodiments, the side wall of the connector 4 may be formed with a support member 42, and the support member 42 may be located at one end of the connector 4 close to the locking member 5; in order to maintain the stability of both sides of the connector 4, one support member 42 may be provided on each side of the connector 4; guide grooves 111 may be formed on both sides of the cavity formed by the upper shell 11 to accommodate the operating member 131, the connector 4 and the locking member 5, and the guide grooves 111 extend along the height direction of the upper shell 11 to guide the movement of the connector 4.

[0071] In some embodiments, the side wall of the connecting member 4 may also be provided with a positioning member 43, and the positioning member 43 is located on the side of the connecting member 4 close to the operating member 131. In order to maintain the stability of both sides of the connecting member 4, one positioning member 43 may be provided on each side of the connecting member 4; the upper shell 11 may also be formed with a positioning groove 112 extending along the height direction of the upper shell 11, and the positioning member 43 is slidably connected in the positioning groove 112.

[0072] In some embodiments, a support vertical surface 421 may be formed on the side of the support member 42 facing away from the positioning member 43, the support vertical surface 421 may be set parallel to the height direction of the battery pack, and the support member 42 may be loosely fitted with the guide groove 111; a positioning vertical surface 431 may be formed on the side of the positioning member 43 facing away from the support member 42, the positioning vertical surface 431 may be set parallel to the height direction of the battery pack, and the positioning member 43 may be loosely fitted with the guide groove 111.

[0073] It can be understood that the position of the supporting facade 421 can be located on the side of the supporting member 42 close to the positioning member 43, and the position of the positioning facade 431 can also be located on the side of the positioning member 43 close to the supporting member 42. Of course, the position of the supporting facade 421 can be located on the side of the supporting member 42 close to the positioning member 43 or on the side of the supporting member 42 away from the positioning member 43. It can be randomly combined with the position of the positioning member 43, and the same is true for the positioning facade 431, as long as it is limited by the two facades and the side walls of the support groove 25 and the positioning groove 112.

[0074] In some embodiments, the distance d7 between the supporting facade 421 and the positioning facade 431 is smaller than the distance d8 between the side wall of the guide groove 111 close to the supporting facade 421 and the side wall of the positioning groove 112 close to the positioning facade 431, that is, the distance between the supporting facade 421 and its adjacent side wall is smaller than the distance between the supporting facade 421 and the other side wall, and the distance between the positioning facade 431 and its adjacent side wall is smaller than the distance between the positioning facade 431 and the other side wall, so that the inclination of the connecting member 4 can be limited by the two facades and side walls of the supporting facade 421 and the positioning facade 431; and / or the facade that limits the inclination is divided into two positions, which can reduce the blockage problem caused by dust accumulation in one of the guide groove 111 or the positioning groove 112.

[0075] Of course, it is understood that the guide groove 111 and the positioning groove 112 can also be combined to form a single groove, with the support vertical surface 421 and the positioning vertical surface 431 cooperating with the two side walls of the single groove to limit the position of the connector 4. The support member 42 and the positioning member 43 can also be combined into a single piece. In this case, the guide groove 111 and the positioning groove 112 can be combined to form a single groove, or they can be two separate grooves, as long as there are two side walls to limit the two vertical surfaces.

[0076] In some embodiments, the side wall where the guide groove 111 contacts the support member 42 and / or the side wall where the positioning groove 112 contacts the positioning member 43 is provided with a protrusion 6. The protrusion 6 can be integrally formed on the side wall of the guide groove 111 and / or the positioning groove 112. The protrusion 6 can be a rib, and the protruding height h4 of the protrusion 6 can be 0.2 mm or 0.3 mm.

[0077] In some embodiments, the maximum difference between the distance d8 between the side wall of the guide groove 111 near the supporting facade 421 and the side wall of the positioning groove 112 near the positioning facade 431 and the distance d7 between the supporting facade 421 and the positioning facade 431 is 1 mm, that is, the maximum movable distance of the connector 4 is 1 mm, which can be optionally 0.2 mm in the embodiment of the present application. Under the premise that the side wall of the guide groove 111 near the supporting facade 421 and the side wall of the positioning groove 112 near the positioning facade 431 have protrusions 6 on their surfaces, the maximum difference between the distance between the side wall of the guide groove 111 near the supporting facade 421 and the side wall of the positioning groove 112 near the positioning facade 431 and the distance between the supporting facade 421 and the positioning facade 431 can also be 1 mm, that is, the actual movable distance of the connector 4 is the maximum distance minus the protruding height of the two protrusions 6, which reduces the sinking of one end of the connector 4 due to uneven force.

[0078] Referring to Figures 2 and 5 , in some embodiments, an insert plate 1312 is formed at the bottom end of the operating member 131. The lower housing 12 is provided with a slot 14 for inserting the insert plate 1312. The insert plate 1312 can be inserted into the slot 14 and slide along the height of the lower housing 12. The slot 14 is a through slot extending along the width of the lower housing 12. The insert plate 1312 is inserted from the top of the slot 14, and the sidewalls of the slot 14 support and limit the insert plate 1312.

[0079] 2 , the battery holder 10 is provided with a support method different from the accommodating portion 1311 at one end close to the operating member 131 and at the bottom end of the operating member 131 . In the embodiment of the present application, a support protrusion may be selected, and the support protrusion is provided for the elastic member 41 to be mounted, thereby providing stable support for the elastic member 41 .

[0080] A light-emitting diode (LED) light board 7 is mounted on one end of the battery holder 10 near the operating member 131. An LED is affixed to the light board 7, and a light guide 121 can be mounted on the lower housing 12 to direct the light emitted by the LED out of the upper and lower housings 11, 12. An operating button 71 is also mounted on the light board 7, and a button cap 122 is mounted on the lower housing 12. The button cap 122 contacts the operating button 71, and the operating button cap 122 presses the operating button 71, causing the light board 7 to control the LED to display the battery pack charge level.

[0081] The bracket 10 is provided with a protruding support member 103 at the bottom of the light board 7. The support member 103 can be a support bar. One or more support members 103 can be provided along the length of the light board 7. In the embodiment of the present application, two support members 103 can be provided. The support members 103 are located at the ends of the length of the light board 7. The support member 103 can be L-shaped, with one long side integrally formed on the surface of the battery bracket 10 and one short side configured to place the light board 7. The length of the short side is greater than or equal to the minimum thickness of the light board 7. This allows the short side of the support member 103 to support the light board 7 after installation, reducing the stress on the wiring of the light board 7.

[0082] Referring to Figures 2 and 7, Figure 7 shows an enlarged schematic diagram of the structure of the clamping plates of the battery pack in one embodiment of the present application. In some embodiments, the battery holder 10 is provided with protruding clamping plates 8 on both sides of the light board 7. The clamping plates 8 can be integrally formed with the battery holder 10. The clamping plates 8 can be located midway between the ends of the light board 7. The clamping plates 8 can be made of an elastic material. When the light board 7 is pressed between the two clamping plates 8, a gap exists between the light board 7 and the two clamping plates 8.

[0083] In some embodiments, the side of the clamping plate 8 away from the battery holder 10 can be bent toward the center of the light board 7 to form a stopper 81. The side of the stopper 81 facing the light board 7 is formed with a stopper plane 811 that can abut against the light board 7. The side of the stopper 81 facing away from the light board 7 is formed with a guide portion 812. The guide portion 812 can be a curved surface or an inclined surface, as long as the distance between the two stoppers 81 decreases from the side away from the light board 7 to the side close to the light board 7, thereby facilitating the insertion of the light board 7 between the two clamping plates 8.

[0084] In some embodiments, the battery holder 10 is provided with a protrusion 104 at the top of the light board 7, and a positioning notch 72 can be formed at the top of the light board 7. The protrusion 104 is symmetrically arranged along the center line of the battery holder 10 in the width direction. The protrusion 104 can be inserted into the positioning notch 72 to limit the position of the top of the light board 7.

[0085] In some embodiments, for ease of installation, there is a gap between the lamp board 7 and the clamping plate 8 and the protrusion 104. The gap is about 0.2 mm-0.5 mm. In the embodiment of the present application, it can be selected as 0.2 mm. The distance that the stopping plane 811 protrudes from the clamping plate 8 is greater than the sum of the two gaps. In the embodiment of the present application, the distance that the stopping plane 811 protrudes from the clamping plate 8 is 0.5 mm.

[0086] In some embodiments, a limiting member 105 is provided at one end of the bracket 10 located at the lamp board 7. A wire groove 1051 is provided on the limiting member 105 for the connecting wire of the lamp board 7 to pass through. An arc groove for embedding the connecting wire can be provided on the top of the limiting member 105. An expanded diameter portion 1052 is formed on the top wall of the limiting member 105 to guide the connecting wire into the arc groove. The expanded diameter portion 1052 can be a slope or an arc surface, and can be selected as a slope in the embodiment of the present application.

[0087] The multiple technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the multiple technical features in the above-mentioned 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.

Claims

1. A battery pack, comprising: shell; A battery holder, housed in the housing and fixedly connected to the housing; A battery cell, at least partially fixed to the battery holder; A limiting portion, formed at one end of the housing and provided with an operating hole; A connecting portion, formed on the housing and provided with a locking hole; An operating member, slidably connected to the operating hole; A locking member is slidably connected in the locking hole and linked with the operating member; a gathering surface is provided on one side of the locking member facing the limiting portion.

2. The battery pack according to claim 1, wherein: The gathering surface is in the shape of an arc or an isosceles triangle; a notch is arranged in the middle of the gathering surface.

3. The battery pack according to claim 1, wherein: A connecting piece is arranged at the bottom end of the operating piece, the locking piece is connected to an end of the connecting piece away from the operating piece, and the locking piece is clearance-matched with the locking hole.

4. The battery pack according to claim 1, wherein: The inner wall of the locking hole is provided with a positioning portion, and the positioning portion is provided on the side wall other than the side wall opposite to the gathering surface; the bottom of the operating member is provided with an elastic member for lifting the operating member, and the bottom wall of the operating member is provided with a receiving portion configured to support the elastic member.

5. The battery pack according to claim 1, wherein: The protruding height of the gathering surface is greater than or equal to 0.5 mm and less than or equal to 2.0 mm; and the dimension of the locking member along the width direction of the connecting portion is at least 30 mm.

6. The battery pack according to claim 3, wherein: A contact portion is provided on the top surface of the locking member; a support member is provided on the side wall of one end of the connecting member close to the locking member; a guide groove is provided on the shell along the height direction, and the support member is slidably connected in the guide groove; a positioning member is provided on the side wall of one end of the connecting member close to the operating member; a positioning groove is provided on the shell along the height direction, and the positioning member is slidably connected in the positioning groove.

7. The battery pack according to claim 6, wherein: A supporting vertical surface is provided on one side of the support member, and the support member and the guide groove are loosely matched. A positioning vertical surface is provided on one side of the positioning member, and the support member and the positioning groove are loosely matched. A protrusion is provided on at least one of the side walls of the guide groove in contact with the support member and the side walls of the positioning groove in contact with the positioning member.

8. The battery pack according to claim 7, wherein: The distance between the supporting facade and the positioning facade is slightly smaller than the distance between the side wall of the guide groove close to the supporting facade and the side wall of the positioning groove close to the positioning facade.

9. The battery pack according to claim 7, wherein: The difference between the distance between the side wall of the guide groove close to the supporting facade and the side wall of the positioning groove close to the positioning facade and the distance between the supporting facade and the positioning facade is at most 1 mm.

10. A power tool comprising: a receiving portion; A motor, received in the accommodation portion and having an output shaft; A handle portion, one end of which is connected to the accommodating portion, and the other end of which is formed with a sole, wherein the sole is configured to be connected to the battery pack according to any one of claims 1 to 9; The sole is formed with a locking hole for inserting a locking piece.

Images