Battery pack and electric power tool

Abstract

A battery pack and an electric power tool (9). The battery pack is configured to be in fitting connection with the electric power tool (9). The electric power tool (9) is provided with a sole (93), on which a support portion (942) is formed. 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 connecting portion (2), which is formed on the housing (1); a guide rail (23), which is arranged on side walls of the top of the connecting portion (2) and forms a sliding space (231) with the housing (1), wherein the sliding space (231) accommodates the support portion (942); a wiring terminal slot (21), which is provided in the top wall of the connecting portion (2); and a support slot (25), which is provided in a side wall of the connecting portion (2), and the support slot (25) accommodates at least part of the support portion (942).

Description

Battery pack and electric tool

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on September 18, 2023, with application number 202322530826.6, 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 an electric 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, electric tools are gradually developing towards lithium batteries and lightweight.

[0004] However, the battery pack and the power tool will wear out after long-term use, affecting the stability of the connection between the battery pack and the power tool.

[0005] Summary of the Invention

[0006] Based on this, it is necessary to provide a battery pack and an electric tool to address the problem of poor connection stability between the battery pack and the electric tool.

[0007] In a first aspect, the present application provides a battery pack configured to be coupled to an electric tool, the electric tool having a sole, the sole forming a support portion; comprising:

[0008] shell;

[0009] a battery holder, housed in the housing and fixedly connected to the housing;

[0010] a battery cell, at least partially fixed to the battery holder;

[0011] a connecting portion formed on the housing;

[0012] A guide rail is provided on a top side wall of the connecting portion and forms a sliding space with the housing, wherein the sliding space accommodates the supporting portion;

[0013] A wiring terminal slot is provided on the top wall of the connecting portion;

[0014] A supporting groove is formed on the side wall of the connecting portion; the supporting groove accommodates at least a portion of the supporting portion.

[0015] Optionally, the distance between the inner wall and the outer wall of the connecting portion is at least 1.5 mm; the length of the supporting groove is at least 15 mm, the width is at least 0.5 mm, and the height is at least 1 mm.

[0016] Optionally, the distance between the side wall of the support groove and the center line of the terminal groove is at least 6 mm; the distance between the outer wall of the connecting portion and the center line of the terminal groove is at least 6.5 mm.

[0017] Optionally, it also includes at least two communication terminal slots opened on the top surface of the connecting part, a blocking slot is arranged between the at least two communication terminal slots, the length of the blocking slot is greater than half the length of each of the communication terminal slots, the wiring terminal slots are located on both sides of the blocking slot, the distance between the center line of the wiring terminal slot and the center line of the blocking slot is less than the distance between the center lines of two adjacent blocking slots, and a closing plate is arranged between the blocking slot and the inside of the shell.

[0018] Optionally, the support groove is located at one end of the side wall of the connecting portion close to the wiring terminal groove, and the support groove is located on a side of the connecting portion close to the top wall of the shell.

[0019] Optionally, the height of the supporting groove is equal to the height of the connecting portion.

[0020] Optionally, an enlarged portion is provided at one end of the side wall of the connecting portion away from the terminal slot, and a guide surface is formed between the enlarged portion and the side wall of the connecting portion.

[0021] Optionally, the height between the enlarged portion and the side wall of the connecting portion is at least 0.5 mm; the length of the supporting groove is greater than or equal to half of the dimension from the end wall of the connecting portion close to the terminal slot to the guide surface.

[0022] In a second aspect, the present application further provides an electric tool, comprising:

[0023] accommodating portion;

[0024] a motor, housed in the accommodation portion and having an output shaft;

[0025] a handle portion, one end of which is connected to the receiving portion, and the other end of which is formed with a sole, the sole being configured to be connected to the battery pack of any of the above embodiments;

[0026] Guide rails are formed on both sides of the top wall of the connecting portion, and support portions are provided on both sides of the bottom of the sole. The support portions are slidably connected in the sliding space, and at least a portion of the support portions extends into the support groove.

[0027] Optionally, the two side walls of the connecting portion are respectively provided with an expansion portion at one end away from the terminal slot, and the distance between the two supporting portions is greater than or equal to the distance between the side walls of the connecting portion and less than or equal to the distance between the two side walls of the expansion portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] FIG1 is a schematic structural diagram of the connection between a battery pack and a power tool in one embodiment of the present application;

[0029] FIG2 is a schematic diagram of an exploded structure of a battery pack in one embodiment of the present application;

[0030] FIG3 is a schematic top view of a battery pack in one embodiment of the present application;

[0031] FIG4 is a schematic cross-sectional view of the structure of a battery pack at a barrier groove in one embodiment of the present application;

[0032] FIG5 is a bottom schematic diagram of a connector of a battery pack in one embodiment of the present application;

[0033] FIG6 is a schematic cross-sectional view of a connector of a battery pack in one embodiment of the present application;

[0034] FIG7 is an enlarged schematic diagram of the structure at point A in FIG2 .

[0035] Description of the drawings: 1. Housing; 10. Battery holder; 101. Battery cell; 102. Circuit board; 103. Support member; 104. Protrusion; 105. Limiting member; 1051. Wire groove; 1052. Diameter expansion portion; 11. Upper housing; 110. Limiting member; 111. Guide groove; 112. Positioning groove; 12. Lower housing; 120. Rubber coating; 121. Light guide column; 122. Button cap; 13. Operation hole; 131. Operating member; 1311. Accommodating 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; 26. 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 portion; 52. Gathering surface; 521. Notch portion; 53. Contact portion; 6. Protruding portion; 7. Light board; 71. Operation button; 72. Positioning notch; 8. Clamping plate; 81. Stopping portion; 811. Stopping plane; 812. Guide portion; 9. Power tool; 91. Accommodating portion; 92. Handle portion; 93. Sole of foot; 931. Blocking member; 94. Slide groove; 941. Extension portion; 942. Support portion; 9421. Support portion; 95. Locking hole. DETAILED DESCRIPTION

[0036] The specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific 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 may make similar modifications without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0037] 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.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined 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 specifically defined.

[0039] 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. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0040] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may 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 may mean that the first feature is directly above or diagonally 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 may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0041] 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.

[0042] Referring to Figures 1 and 2, Figure 1 shows a structural schematic diagram of the connection between the battery pack and the power tool in an embodiment of the present application, and Figure 2 shows an exploded structural schematic diagram 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 the power tool 9, and includes a housing 1, a battery holder 10 and a battery cell 101. The battery holder 10 is housed in the housing 1, and the battery cell 101 can be at least partially fixed to the battery holder 10.

[0043] The present application also discloses an electric tool 9, which is connected to a battery pack. The electric 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. A transmission mechanism may be connected to the output shaft. The motor and the transmission mechanism are configured to output power, or the power may be directly output 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, which is connected to the battery pack, thereby obtaining electrical energy from the battery pack to drive the motor to rotate.

[0044] 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 insulating materials such as resin or plastic. The upper shell 11 and the lower shell 12 may form a rectangular parallelepiped, and 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 for accommodating the battery holder 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.

[0045] 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 in an array along the width direction. 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 and lower shells 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 (i.e., the end of the connecting portion 2 away from the limiting portion 110 in the length direction).

[0046] A circuit board 102 can be mounted on the top of the battery holder 10. Chips and other components for controlling and detecting 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 connecting portion 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 upper shell 11 in the width direction; two communication terminal slots 22 can be provided, located on both sides of the center line of the upper shell 11 in the width direction and can be located between the two wiring terminal slots 21. The wiring terminal slot 21 is configured to accommodate the power female terminal, and the communication terminal slot 22 is configured to accommodate the communication female terminal. Male communication terminals and male connection terminals are mounted on the sole 93. The male connection terminal passes through the wiring terminal slot 21 and is inserted into the power female terminal. The male communication terminal passes through the communication terminal slot 22 and is inserted into the communication female terminal, enabling the battery pack to power and communicate with the power tool 9.

[0047] The upper housing 11 defines a blocking slot 3, the centerline of which may be coplanar with a symmetrical plane along the width 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.

[0048] Referring to Figures 2 and 3, Figure 3 shows a schematic top view of a battery pack in an embodiment of the present application. In some optional 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 understandable 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; in order 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.

[0049] In some optional 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.

[0050] Referring to Figures 1 and 3, in some optional 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 barrier groove 3 at the top wall of the connecting portion 2 or the end wall of the barrier groove 3 in the length direction is not connected to the interior of the cavity formed by the upper and lower shells 12.

[0051] In some optional embodiments, the height of the barrier 931 is greater than half the height of the blocking groove 3. It is understandable that the height of the barrier 931 may also be equal to the height of the blocking groove 3, as long as the two communication terminals can be blocked to reduce the impact between the two communication terminals.

[0052] In some optional embodiments, referring to FIG. 3 , 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 .

[0053] In some optional embodiments, the barrier 931 can be made of a magnetic-isolating material and / or the inner wall of the barrier slot 3 can 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 the barrier 931 and / or the barrier slot 3 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 can be reduced.

[0054] In some optional 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 ends. 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 ends, 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, and the barrier 931 and / or the barrier groove 3 can also be made entirely of metal material, and even the metal material can be coated on the barrier 931 and / or the barrier groove 3, as long as the impact between the two communication mother ends can be reduced.

[0055] 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 941. The extension 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 sliding position of the battery pack relative to the power tool 9.

[0056] In some optional embodiments, an expansion portion 24 may be formed on 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.

[0057] Referring to Figures 2 and 4, Figure 4 shows a schematic structural cross-sectional view of the barrier groove of the battery pack in an embodiment of the present application. In some optional embodiments, the height h1 between the enlarged 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 distance between the enlarged 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.

[0058] In some optional embodiments, the distance between the two supporting portions 942 is less than or equal to the distance between the side walls of the two enlarged portions 24, and greater than or equal to the distance between the side walls of the connecting portion 2; when the supporting portion 942 of the power tool 9 contacts the side wall of the connecting portion 2, the supporting portion 942 can smoothly transition to the enlarged portion 24 under the guidance of the guide surface 241, thereby forming a sense of frustration and / or facilitating the supporting portion 942 to clamp the enlarged portion 24 to facilitate fixation of the battery pack.

[0059] In some optional 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. When the battery pack is mated with the power tool 9, that is, when the supporting portion 942 is inserted into the sliding space 231, the support portion 9421 can be inserted into the support groove 25. When the guide rail 23 and the slide groove 94 wear, the support portion 9421 and the support groove 25 cooperate with each other, which can improve the stability of the mating of the battery pack and the power tool 9 when the guide rail 23 wears.

[0060] In an embodiment of the present application, a support groove is added to the side wall of the connection part to play an auxiliary support role when the guide rail and the power tool wear, thereby improving the stability of the connection between the battery pack and the power tool. In some optional 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 part 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 connection part 2 is greater than or equal to 6mm. In an embodiment of the present application, the distance between the center line of the terminal slot 21 and the side wall of the connection part 2 is 7.75mm. Under the premise of having a support groove 25, the distance d4 between the side wall of the support groove 25 and the center line of the terminal slot 21 is at least 6mm, and the distance d3 between the outer wall of the connection part 2 and the center line of the terminal slot 21 is at least 6.5mm. In an embodiment of the present application, the distance between the center line of the terminal slot 21 and the side wall of the connection part 2 is at least 6.75mm.

[0061] In some optional 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, which is 2.7 mm in the embodiment of the present application; optionally, 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, which can be selected as 1.72 mm in the embodiment of the present application, thereby maintaining the wall thickness of the connecting part 2 and thus maintaining the strength of the connecting part 2.

[0062] Referring to Figures 1 and 4, in some optional 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, so as to facilitate improving the stability of the support groove 25 and the support portion 9421.

[0063] In some optional 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 assembly of the battery pack onto the sole 93 of the power tool 9.

[0064] In some optional embodiments, an insulating sleeve is provided on the outer side of the power female end, and a gap is reserved between the insulating sleeve and the inner wall of the connecting part 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.

[0065] In some optional 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 slot 21 to the expanded portion 24. In the embodiment of the present application, the length of the support groove 25 is equal to half of the size from the end wall of the connecting portion 2 close to the terminal slot 21 to the expanded portion 24.

[0066] Referring to Figures 2, 3 and 5, an operating hole 13 is provided 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 provided 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.

[0067] 1 and 2 , an elastic member 41 is mounted below the connector 4 and between the circuit board 102. The elastic member 41 may be a spring that 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 a position corresponding to 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.

[0068] 2 and 3 , in some optional embodiments, a relief portion 51 is formed on a side of the locking member 5 away from the limiting portion 110. The relief portion 51 may 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 portion, 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.

[0069] 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 optional embodiments, the elastic member 41 may 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 may be formed with a receiving portion 1311, which is configured to support the elastic member 41. The receiving portion 1311 may be a protrusion for the elastic member 41 to be sleeved, or it may be a tubular groove for the elastic member 41 to be inserted. It will be understood by those skilled in the art that the receiving portion 1311 may be any equivalent method of providing support for the elastic member 41. In the embodiment of the present application, the receiving portion 1311 is a tubular groove.

[0070] Referring to Figures 2 and 3 , in some optional embodiments, the side of the locking member 5 facing the limiting portion 110 is a vertical surface, and the side of the locking member 5 facing away from the yielding portion 51 is provided with a gathering surface 52. The gathering surface 52 can be arc-shaped, i.e., the locking member 5 can be arc-shaped along its length, i.e., 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 range of at least 15 degrees, and in the embodiment of the present application, the arc length range is 19 degrees, and the arc radius is at least 95 mm, and in the embodiment of the present application, the arc radius R can be 103 mm. The gathering surface 52 can also be an isosceles triangle. The configuration of the gathering 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 configuration of the gathering surface 52 increases the contact area between the locking member 5 and the locking hole 95, while generating a gathering force toward the center of the length of the locking member 5, thereby reducing the deflection of the battery pack in the width direction of the battery pack. 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.

[0071] In some optional 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 1.55 mm.

[0072] In some optional 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 optionally 33 mm in the embodiment of the present application.

[0073] In some optional embodiments, a notch portion 521 may be provided at the midpoint of the gathering surface 52, and the minimum width W2 of the notch portion 521 may be 0.5 mm, which may be optionally 1 mm in the embodiment of the present application; the housing 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 portion 521 can provide a certain avoidance space for the burrs and / or release the stress on the entire gathering surface 52.

[0074] In some optional 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.

[0075] Referring to Figures 3 and 5, in some optional 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 side wall other than the side wall opposite the convergence surface 52. Two positioning portions 231 can be provided on each side wall. Each positioning portion 231 can be a rib integrally formed on the inner wall of the locking hole 26, so as to facilitate positioning of the locking member 5 while reducing the possibility of jamming during the sliding of the locking member 5. Of course, three positioning portions can also be provided to achieve uniform force distribution, which is understood by those skilled in the art.

[0076] 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 optional 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 for accommodating 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.

[0077] In some optional 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.

[0078] In some optional 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 positioning groove 112.

[0079] 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 guide groove 111 and the positioning groove 112.

[0080] In some optional 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 the side wall adjacent to it is smaller than the distance between the other side walls, and the distance between the positioning facade 431 and the side wall adjacent to it is smaller than the distance between the other side walls, 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.

[0081] Of course, it is understood that the guide groove 111 and the positioning groove 112 can also be combined into one groove to form a single groove, and the support vertical surface 421 and the positioning vertical surface 431 cooperate with the two side walls of the single groove to limit the connection member 4. For example, the support member 42 and the positioning member 43 can also be combined into one piece. In this case, the guide groove 111 and the positioning groove 112 can be combined into one groove or two independent grooves, as long as there are two side walls to limit the two vertical surfaces.

[0082] In some optional 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.

[0083] In some optional embodiments, the 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 at most 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 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 at most 1 mm (that is, the maximum distance), that is, the actual movable distance of the connector 4 is the maximum distance minus the height of the two protrusions 6, which reduces the sinking of one end of the connector 4 due to uneven force.

[0084] Referring to Figures 2 and 5 , in some optional 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 side walls of the slot 14 support and limit the insert plate 1312.

[0085] 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 .

[0086] An LED light board 7 is mounted between the batteries, near the operating member 131. An LED light 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 light to display the battery charge level.

[0087] The battery holder 10 has 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 with the surface of the battery holder 10 and one short side configured to accommodate 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.

[0088] 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 optional 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 in the middle of the ends of the light board 7. The clamping plates 8 can be made of 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.

[0089] In some optional 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 surface 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.

[0090] In some optional embodiments, the battery holder 10 is provided with a protrusion 104 on the top of the light board 7, and a positioning notch 72 can be formed on 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, and the protrusion 104 can be inserted into the positioning notch 72 to limit the position of the top of the light board 7.

[0091] In some optional embodiments, for ease of installation, there are gaps between the lamp board 7 and the clamping plate 8, as well as between the lamp board 7 and the protrusion 104. The gaps are approximately 0.2 mm to 0.5 mm. In the embodiment of the present application, the gap 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.

[0092] In some optional embodiments, a limiting member 105 is provided at one end of the battery holder 10 located at the lamp board 7, and 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, and 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 a curved surface, and can be selected as a slope in the embodiment of the present application.

[0093] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the 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.

[0094] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A battery pack configured to be coupled to an electric tool, wherein the electric tool has a sole, wherein the sole is formed with a support portion; the 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 connecting portion formed on the housing; A guide rail, arranged on a top side wall of the connecting portion and forming a sliding space with the housing, wherein the sliding space accommodates the supporting portion; A wiring terminal slot is provided on the top wall of the connecting portion; A supporting groove is formed on the side wall of the connecting portion, and the supporting groove accommodates at least a portion of the supporting portion.

2. The battery pack according to claim 1, wherein: The distance between the inner wall and the outer wall of the connecting portion is greater than or equal to 1.5 mm; the length of the supporting groove is greater than or equal to 15 mm, the width is greater than or equal to 0.5 mm, and the height is greater than or equal to 1 mm.

3. The battery pack according to claim 1, wherein: The distance between the side wall of the support groove and the center line of the terminal groove is greater than or equal to 6 mm; the distance between the outer wall of the connecting portion and the center line of the terminal groove is greater than or equal to 6.5 mm.

4. The battery pack according to claim 1 further includes at least two communication terminal grooves opened on the top surface of the connecting part, a blocking groove is arranged between the at least two communication terminal grooves, the length of the blocking groove is greater than half of the length of each of the communication terminal grooves, the wiring terminal grooves are located on both sides of the blocking grooves, the distance between the center line of the wiring terminal groove and the center line of the blocking groove is less than the distance between the center lines of two adjacent blocking grooves, and a closing plate is arranged between the blocking groove and the inside of the outer shell.

5. The battery pack according to claim 1, wherein: The supporting groove is located at one end of the side wall of the connecting portion close to the wiring terminal groove, and the supporting groove is located at one side of the connecting portion close to the top wall of the housing.

6. The battery pack according to claim 1, wherein: The height of the supporting groove is equal to the height of the connecting portion.

7. The battery pack according to claim 1, wherein: An enlarged portion is disposed at one end of the side wall of the connection portion away from the terminal slot, and a guide surface is formed between the enlarged portion and the side wall of the connection portion.

8. The battery pack according to claim 7, wherein: The height between the enlarged portion and the side wall of the connecting portion is greater than or equal to 0.5 mm; the length of the supporting groove is greater than or equal to half of the dimension from the end wall of the connecting portion close to the terminal groove to the guide surface.

9. An electric 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 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 8; Guide rails are formed on both sides of the top wall of the connection part, and support parts are arranged on both sides of the bottom of the sole. The support parts are slidably connected in the sliding space, and the support parts at least partially extend into the support groove.

10. The electric tool according to claim 9, wherein: The two side walls of the connection part are respectively provided with expansion parts at one end away from the terminal slot, and the distance between the two support parts is greater than or equal to the distance between the side walls of the connection part, and less than or equal to the distance between the two side walls of the expansion parts.

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