Battery pack and electric tool system

Abstract

The utility model relates to a battery pack and an electric tool system.The battery pack is used for being connected with a first electric tool or a second electric tool and comprises a shell and a battery assembly arranged in the shell; the battery pack further comprises a switching mechanism, the switching mechanism is provided with a first position and a second position, when the battery pack is connected with the first electric tool in an inserted mode, the switching mechanism is pushed by the first electric tool to the second position, and the battery pack outputs first voltage. When the battery pack is separated from the first electric tool, the switching mechanism is pushed to the first position by the first electric tool, and the battery pack outputs a second voltage. When the battery pack is inserted into the first electric tool, the battery pack can be automatically switched into a high-voltage output state; after the battery pack is separated from the first electric tool, the battery pack can be automatically switched to a low-voltage output state.

Description

Technical Field

[0001] The present application relates to the technical field of power tools, and in particular to a battery pack and a power tool system. Background Art

[0002] A battery pack is a system consisting of multiple battery cells connected in parallel or series and equipped with auxiliary components such as a battery management system and cooling system to meet specific application requirements. In power tools such as electric drills and lawn mowers, battery packs can provide a portable power source, increasing the flexibility and convenience of power tools. To improve utilization, these batteries are typically rechargeable battery packs, such as nickel-cadmium (NiCd), nickel-metal hydride (NiMH), and lithium-ion (L-ion) battery packs.

[0003] As power tools become increasingly popular, they are being used in a growing number of applications. To meet these demands, power tools must meet corresponding performance requirements. Consequently, power and energy sources are becoming more diverse, such as batteries that need to be designed to accommodate both high and low voltages.

[0004] However, how to achieve universal battery use among different power tools to improve convenience has become an industry challenge. Summary of the Invention

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] In one embodiment, a battery pack is provided for connecting to a first power tool or a second power tool, wherein the operating voltage of the first power tool is a first voltage, the operating voltage of the second power tool is a second voltage, the first voltage is different from the second voltage, the battery pack includes a shell and a battery assembly arranged in the shell; the shell is provided with a coupling portion for matching; the battery assembly includes a first battery group and a second battery group; the first battery group has a first positive pole and a first negative pole, and the second battery group has a second positive pole and a second negative pole; the battery pack also includes a switching mechanism, the switching mechanism has a first position and a second position, when the battery pack is plugged into the first power tool, the switching mechanism is pushed to the second position by the first power tool, and the battery pack outputs the first voltage; when the battery pack is disconnected from the first power tool, the switching mechanism is pushed to the first position by the first power tool, and the battery pack outputs the second voltage.

[0007] Optionally, when the battery pack is plugged into the second power tool, the second power tool avoids pushing against the switching mechanism.

[0008] Optionally, the switching mechanism includes a pushed member and a limiting member; the pushed member has a pushed plate, the pushed plate has a limiting hole, and the limiting member is limited in the limiting hole; when the switching mechanism is in the first position, the limiting member does not protrude from the upper surface of the pushed plate, and when the switching mechanism is in the second position, the limiting member protrudes from the upper surface of the pushed plate.

[0009] Optionally, the limiting member is driven by the pushed plate and moves along the length direction of the battery pack; the joint is provided with a receiving groove for accommodating the pushed member, the receiving groove is provided with a sliding groove, the limiting member is at least partially accommodated in the sliding groove, the sliding groove has a first step surface, a second step surface and a connecting surface connecting the first step surface and the second step surface, the first step surface is lower than the second step surface, and the connecting surface is an inclined surface; when the limiting member abuts against the first step surface, the limiting member does not protrude from the upper surface of the pushed member, and when the limiting member abuts against the second step surface, the limiting member protrudes from the upper surface of the pushed member.

[0010] Optionally, the first step surface and the second step surface smoothly transition to the connecting surface; and the bottom of the limiting member is at least partially designed to be an arc.

[0011] Optionally, the sliding groove is provided with a guide groove, and the limiting member is provided with a guide column, and the guide column cooperates with the guide groove.

[0012] Optionally, the combining part is composed of a front section and a rear section; the front section of the combining part is provided with a recessed portion, and after the pushed member is accommodated in the accommodating groove, the upper surface of the pushed member is higher than the upper surface of the recessed portion; at least part of the upper surface of the front section of the combining part is higher than the upper surface of the pushed member, and the aforementioned raised portion is further forward than the switching mechanism when it is in the first position.

[0013] Optionally, the switching mechanism includes a switching member, which cooperates with the pushed member; the switching member includes a switching plate, which is provided with a positioning groove, and the pushed member has a positioning bar connected to the bottom of the pushed plate, and the positioning bar passes through the positioning groove; the positioning bar is provided with a barb.

[0014] Optionally, the switching mechanism includes a pushed member having a pushed plate and a first pushed block protruding from an upper surface of the pushed plate.

[0015] Optionally, the pushed member has a second pushed block protruding from the upper surface of the pushed plate; the combining part is divided into a front section and a rear section; the front section of the combining part is provided with a recessed portion, and the upper surface of the second pushed block is higher than the upper surface of the recessed portion of the combining part; the rear end of the first pushed block is provided with a guide surface, and the front end of the first pushed block is provided with a vertical surface.

[0016] Optionally, projections of the first pushed block and the second pushed block in the width direction of the battery pack do not overlap.

[0017] Optionally, the combining part is composed of a front section and a rear section; the front section of the combining part is provided with a recessed portion, the upper surface of the first pushed block is higher than the upper surface of the recessed portion of the combining part, at least part of the upper surface of the front section of the combining part is higher than the upper surface of the pushed member, and the aforementioned raised portion is further forward than the switching mechanism when it is in the first position; a guide surface is provided at the front end of the first pushed block.

[0018] Optionally, the coupling portion is provided with a receiving groove, the pushed member is received in the receiving groove, and the receiving groove has a first guide protrusion protruding from the bottom surface; the first guide protrusion is not lower than the first pushed block.

[0019] Optionally, the switching mechanism includes a switching member, which cooperates with the pushed member; the switching member includes a switching plate, which is provided with a positioning groove, and the pushed member has a positioning bar connected to the bottom of the pushed plate, and the positioning bar passes through the positioning groove; the positioning bar is provided with a barb.

[0020] Optionally, the battery pack further includes a switching terminal, which includes a switching plug terminal and a switching socket terminal; the switching plug terminal includes a first positive pin, a first negative pin, a second positive pin, a second negative pin, a third positive pin and a third negative pin fixed on the switching board, and the first positive pin, the first negative pin, the second positive pin, the second negative pin, the third positive pin and the third negative pin are insert-molded in the switching component; the first positive pin and the second positive pin are electrically connected, the first negative pin and the second negative pin are electrically connected, and the third positive pin and the third negative pin are electrically connected; the switching socket terminal includes a first positive terminal, a first negative terminal fixed in the joint, The first positive terminal, the first negative terminal, the second positive terminal, the second negative terminal, the third positive terminal and the third negative terminal are all clip-on terminals; the first positive terminal and the third positive terminal are both connected to the first positive electrode, the first negative terminal is connected to the first negative electrode, the second positive terminal is connected to the second positive electrode, and the second negative terminal and the third negative terminal are both connected to the second negative electrode; the first positive pin, the first negative pin, the second positive pin, the second negative pin, the third positive pin and the third negative pin correspond one-to-one to the first positive terminal, the first negative terminal, the second positive terminal, the second negative terminal, the third positive terminal and the third negative terminal.

[0021] In another embodiment, an electric tool system is provided, which includes a first electric tool and a battery pack as described above; the first electric tool has a limiting recess and a step portion; the limiting recess can accommodate the limiting member; the step portion can push the pushed plate.

[0022] In another embodiment, an electric tool system is provided, which includes a first electric tool and a battery pack as described above; the battery connecting portion of the first electric tool has a pushing member, the pushing member includes a pushing member and an elastic member that pushes the pushing member downward, and the pushing member protrudes downward from the bottom surface of the battery connecting portion of the first electric tool; the pushing member includes a pushing block, which can push the first pushed block.

[0023] Optionally, the battery connecting portion of the first electric tool has a step portion; and the pushing member includes a second guide protrusion.

[0024] Compared with the prior art, the battery pack of the present application can automatically switch to a high-voltage output state when connected to the first power tool; and can automatically switch to a low-voltage output state after the battery pack is disconnected from the first power tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the overall structure of the battery pack in Example 1 of the present application;

[0026] Figure 2 This is an exploded view of the upper housing and the switching structure of the battery pack in Example 1 of the present application;

[0027] Figure 3 This is a schematic structural diagram of the upper housing of the battery pack in Example 1 of the present application;

[0028] Figure 4 This is a schematic structural diagram of the switching mechanism of the battery pack in Example 1 of the present application;

[0029] Figure 5 This is an exploded view of the switching component of the battery pack in Example 1 of the present application;

[0030] Figure 6 This is a schematic structural diagram of a switching component of a battery pack in Example 1 of the present application;

[0031] Figure 7 This is a schematic structural diagram of a position-limiting member of a battery pack in Example 1 of the present application;

[0032] Figure 8 2. This is a cross-sectional view of the upper housing and the switching structure of the battery pack in the first embodiment of the present application (first position);

[0033] Figure 9 2. This is a cross-sectional view of the upper housing and the switching structure of the battery pack in the first embodiment of the present application (second position);

[0034] Figure 10 This is a cross-sectional view of the battery pack in Example 1 of the present application (first position);

[0035] Figure 11 2. This is a cross-sectional view of the battery pack in the first embodiment of the present application (second position);

[0036] Figure 12 A first cross-sectional view of the battery pack and the first power tool plugged together in the first embodiment of the present application;

[0037] Figure 13 A second cross-sectional view of the battery pack and the first power tool in the first embodiment of the present application;

[0038] Figure 14 A first cross-sectional view of the battery pack detached from the first power tool in the first embodiment of the present application;

[0039] Figure 15 A second cross-sectional view of the battery pack detached from the first power tool in the first embodiment of the present application;

[0040] Figure 16 A cross-sectional view of the battery pack and the second power tool in the first embodiment of the present application;

[0041] Figure 17 This is a schematic diagram of the overall structure of the battery pack in Example 2 of the present application;

[0042] Figure 18 This is a schematic structural diagram of the upper housing of the battery pack in Example 2 of the present application;

[0043] Figure 19 This is a schematic structural diagram of the switching mechanism of the battery pack in the second embodiment of the present application;

[0044] Figure 20 This is a schematic structural diagram of the first electric tool in the second embodiment of the present application;

[0045] Figure 21 This is a structural diagram of the pushing component of the first electric tool in the second embodiment of the present application;

[0046] Figure 22 This is a schematic structural diagram of the pushing member of the first electric tool from another perspective in the second embodiment of the present application;

[0047] Figure 23 A first cross-sectional view of the battery pack and the first power tool plugged together in the second embodiment of the present application;

[0048] Figure 24 An enlarged view of the first cross-sectional view of the battery pack plugged into the first power tool in the second embodiment of the present application;

[0049] Figure 25 A second cross-sectional view of the battery pack and the first power tool plugged together in the second embodiment of the present application;

[0050] Figure 26 This is an enlarged view of the second cross-sectional view of the battery pack plugged into the first power tool in the second embodiment of the present application;

[0051] Figure 27 A first cross-sectional view of the battery pack detached from the first power tool in the second embodiment of the present application;

[0052] Figure 28 This is an enlarged view of the second cross-sectional view of the battery pack being separated from the first power tool in the second embodiment of the present application. DETAILED DESCRIPTION

[0053] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, 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 can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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. Example

[0059] See Figure 1-16 One embodiment of the present application provides a battery pack 100 for selectively connecting to a first power tool 200 or a second power tool 300. The first power tool 200 operates at a first voltage, while the second power tool 300 operates at a second voltage, where the first voltage is different from the second voltage. The battery pack 100 includes a housing 11, a battery assembly 12 disposed within the housing 11, and a locking mechanism movably assembled within the housing.

[0060] In this embodiment, the housing 11 includes an upper housing 111 and a lower housing 112. The upper housing 111 and the lower housing 112 are combined to form a receiving space for receiving the battery assembly 12. Figure 1-2 The housing 11 may further include a coupling portion 113, through which the battery pack 100 can be selectively connected to the first power tool 200 or the second power tool 300. Specifically, both the first power tool 200 and the second power tool 300 may be provided with a battery connection portion that couples with the coupling portion 113. Guide rails may be provided on both sides of the coupling portion 113, and the battery connection portion may be provided with corresponding slide grooves that adapt to the guide rails. The cooperation of the guide rails and the slide grooves facilitates smooth coupling of the first power tool 200 or the second power tool 300 with the battery pack 100. A locking slot may be provided on the battery connection portion, and the locking mechanism includes an operating member 131, a locking member 132 connected to the operating member 131, and a biasing member (such as a spring) for providing support force to the operating member 131. The locking member 132 may couple with the locking slot of the battery connection portion to lock the battery pack 100 to the first power tool 200 or the second power tool 300. The operating member 131 can move the locking member 132 to disengage the locking slot, thereby disconnecting the battery pack 100 from the first power tool 200 or the second power tool 300. The coupling portion 113 can be provided with a voltage output portion having a positive output terminal 1131 and a negative output terminal 1132 for outputting a voltage to the outside, which can be selectively used to power the connected power tool.

[0061] The battery assembly 12 includes a first battery pack, a second battery pack, and a battery bracket for fixing the first battery pack and the second battery pack. The first battery pack is composed of a plurality of battery cells connected in series and has a first positive electrode and a first negative electrode. The second battery pack is also composed of a plurality of battery cells connected in series and has a second positive electrode and a second negative electrode. In this embodiment, the number of battery cells of the first battery pack can be configured to be 5, and the number of battery cells of the second battery pack can also be configured to be 5. Of course, those skilled in the art will understand that in order to adapt to different working conditions, the number of battery cells here can be other numbers. Of course, replacement of different numbers is also protected by this application.

[0062] See Figure 2 and Figure 4 The battery pack 100 further includes a switching mechanism 14. The switching mechanism 14 includes a switching member 141, a pushed member 142 connected to the switching member 141, and a limiting member 143. The switching member 141 and the pushed member 142 are linked together. In other embodiments, the switching member 141 can be designed as an integral unit with the pushed member 142. Figure 5 and Figure 6 The switching member 141 includes a switching plate 1411 and a switching terminal. The switching plate 1411 is provided with a plurality of positioning slots 14110 for linkage with the pushed member 142.

[0063] See Figure 2 and Figure 4 The pushed member 142 has a pushed plate 1421 and a positioning bar 1422 connected to the bottom of the pushed plate 1421. The pushed plate 1421 has a limiting hole 14210. The limiting member 143 is limited in the limiting hole 14210 and can be driven by the pushed plate 1421 to move along the length direction of the battery pack 100. The positioning bar 1422 is provided with a barb. The multiple positioning bars 1422 pass through the corresponding positioning slots 14110 of the switching plate 1411, and the barb is used to realize the assembly connection between the switching member 141 and the pushed member 142. The switching member 141 and the pushed member 142 can realize the movement along the length direction of the battery pack synchronously.

[0064] See Figure 2 and Figure 3The coupling portion 113 is provided with a receiving groove 1130 for accommodating the pushed member 142. The coupling portion 113 is divided into a front section and a rear section. The front section is the section of the coupling portion 113 away from the locking mechanism, and the rear section is the section of the coupling portion 113 away from the locking mechanism. The front section of the coupling portion 113 is provided with a recessed portion for making way when docking with the first power tool 200. After the pushed member 142 is received in the receiving groove 1130, the upper surface of the pushed member 142 is higher than the upper surface of the recessed portion of the coupling portion 113. In this embodiment, after the pushed member 142 is received in the receiving groove 1130, the upper surface of the rear section of the coupling portion 113 is not lower than the upper surface of the pushed member 142 and is higher than the upper surface of the recessed portion of the coupling portion 113. The switching mechanism 14 has a first position and a second position. The first position is when the pushed member 142 is located at the front end of the receiving groove 1130, and the second position is when the pushed member 142 is located at the rear end of the receiving groove 1130. At least part of the upper surface of the front section of the coupling portion 113 is higher than the upper surface of the pushed member 142, and the aforementioned raised portion is further forward than the switching mechanism 14 when it is in the first position, so as to prevent the switching member 141 from being accidentally touched when the battery pack 100 is docked with the second power tool 300.

[0065] The receiving groove 1130 of the joint 113 is provided with a plurality of limiting grooves 11301 and sliding grooves 11302. The positioning bar 1422 passes through the limiting grooves 11301. Figure 3 、 Figure 8 and Figure 9 The sliding groove 11302 has a first step surface, a second step surface and a connecting surface connecting the first step surface and the second step surface. The first step surface is closer to the front section of the coupling portion 113 than the second step surface. The first step surface is lower than the second step surface, and the connecting surface is an inclined surface.

[0066] See Figure 3 、 Figure 8 and Figure 9, the limiting member 143 is at least partially accommodated in the sliding groove 11302. Driven by the pushed plate 1421, the limiting member 143 moves between the first step surface and the second step surface. When the limiting member 143 abuts against the first step surface, the limiting member 143 does not protrude from the upper surface of the pushed member 142. When the limiting member 143 abuts against the second step surface, the limiting member 143 protrudes from the upper surface of the pushed member 142. In a preferred embodiment, in order to ensure the reliability of the sliding of the limiting member 143, the first step surface and the second step surface are smoothly transitioned to the connecting surface. Furthermore, the bottom of the limiting member 143 is at least partially designed to be an arc. In a preferred embodiment, the sliding groove 11302 can be provided with a guide groove 11303, and the limiting member 143 is provided with a guide column 1431, and the guide column 1431 cooperates with the guide groove 11303 to achieve smooth movement of the limiting member 143 along the expected trajectory.

[0067] The battery connection portion of the first electric tool 200 has a limiting recess 21 and a step portion 22. The limiting recess 21 can accommodate the limiting member 143.

[0068] See Figure 12 and Figure 13 , the direction of the arrow in the figure is the movement direction of the battery pack 100. When the battery pack 100 is plugged into the first power tool 200, the guide rail of the battery pack 100 is plugged into the sliding groove of the first power tool 200. When the pushed plate 1421 contacts the step portion 22, the limiting member 143 abuts against the first step surface, and the limiting member 143 is opposite to the limiting recess 21; when the pushed plate 1421 is pushed by the step portion 22 and moves backward relative to the battery pack 100 shell 11, the limiting member 143 is driven by the pushed plate 1421 and moves backward relative to the battery pack 100 shell 11, and then, under the guidance of the connecting surface, gradually protrudes out of the upper surface of the pushed plate 1421 and enters the limiting recess 21; when the pushed plate 1421 further moves backward relative to the battery pack 100 shell 11 and is limited by the receiving groove 1130, the limiting member 143 abuts against the second step surface, and the limiting member 143 protrudes into the limiting recess 21. At this time, the switching mechanism 14 is located in the second position, and the battery pack 100 can achieve high voltage output (see the following description for details).

[0069] See Figure 14 and Figure 15When the battery pack 100 is disengaged from the first power tool 200, the retaining recess 21 engages the retaining member 143, causing it to move forward relative to the battery pack 100 housing 11. This in turn drives the pushed plate 1421 forward relative to the battery pack 100 housing 11. During this process, the retaining member 143 gradually moves downward, guided by the connecting surface. When the pushed plate 1421 moves further forward relative to the battery pack 100 housing 11 and is restrained by the receiving groove 1130, the retaining member 143 abuts the first step surface and disengages from the retaining recess 21, completing the separation of the battery pack 100 from the first power tool 200. At this point, the switching mechanism 14 is in the first position, enabling the battery pack 100 to achieve low-voltage output (details will be discussed later).

[0070] As described above, when the battery pack 100 is connected to the first power tool 200, it automatically switches to a high-voltage output state. When disconnected from the first power tool 200, the battery pack 100 automatically switches to a low-voltage output state. When connected to the second power tool 300, the battery pack 100 outputs a low voltage. Therefore, the battery pack 100 automatically matches the corresponding power tool and provides the corresponding voltage output.

[0071] In order to prevent the limiting member 143 from hard collision with the first power tool 200 or the second power tool 300 under special circumstances, a guiding portion is provided at the upper front end of the limiting member 143 .

[0072] The switching terminal includes a switching plug terminal and a switching socket terminal.

[0073] The switching plug terminal includes a first positive pin 14111, a first negative pin 14112, a second positive pin 14113, a second negative pin 14114, a third positive pin 14115, and a third negative pin 14116, which are fixed to a switching plate 1411. These first positive pin 14111, first negative pin 14112, second positive pin 14113, second negative pin 14114, third positive pin 14115, and third negative pin 14116 may be insert-molded into the switching element 141. Of course, it is understood that other mounting methods may also be used. Furthermore, the first positive pin 14111 and the second positive pin 14113 are electrically connected, the first negative pin 14112 and the second negative pin 14114 are electrically connected, and the third positive pin 14115 and the third negative pin 14116 are electrically connected.

[0074] The switching socket terminals include a first positive terminal 1441, a first negative terminal 1442, a second positive terminal 1443, a second negative terminal 1444, a third positive terminal 1445, and a third negative terminal 1446, which are fixed within the coupling portion 113. In this embodiment, the first positive terminal 1441, the first negative terminal 1442, the second positive terminal 1443, the second negative terminal 1444, the third positive terminal 1445, and the third negative terminal 1446 are all clip-on terminals. The first positive terminal 1441 and the third positive terminal 1445 are both connected to the first positive electrode, the first negative terminal 1442 is connected to the first negative electrode, the second positive terminal 1443 is connected to the second positive electrode, and the second negative terminal 1444 and the third negative terminal 1446 are both connected to the second negative electrode.

[0075] The first positive pin 14111 , the first negative pin 14112 , the second positive pin 14113 , the second negative pin 14114 , the third positive pin 14115 , and the third negative pin 14116 correspond one-to-one to the first positive terminal 1441 , the first negative terminal 1442 , the second positive terminal 1443 , the second negative terminal 1444 , the third positive terminal 1445 , and the third negative terminal 1446 .

[0076] In this embodiment, the first positive terminal 1441, the second positive terminal 1443, the first negative terminal 1442, and the second negative terminal 1444 can be arranged side by side in the same direction along the width direction of the shell 1 and define a first axis, the third positive terminal 1445 and the third negative terminal 1446 can also be arranged side by side in the same direction along the width direction of the shell 1 and define a second axis, the second positive terminal 1443 and the third positive terminal 1445 are arranged opposite to each other, and the first negative terminal 1442 and the third negative terminal 1446 are arranged opposite to each other. Correspondingly, first positive pin 14111, second positive pin 14113, first negative pin 14112, and second negative pin 14114 can be arranged side by side in the same direction along the width of housing 1. Third positive pin 14115 and third negative pin 14116 can be arranged side by side in the same direction along the width of housing 1. Second positive pin 14113 and third positive pin 14115 are arranged opposite each other, and first negative pin 14112 and third negative pin 14116 are arranged opposite each other. The switching member 141 slides between the first axis and the second axis, allowing the switching mechanism 14 to be in the first position or the second position.

[0077] See Figure 10When the switching mechanism 14 is in the first position, the first positive pin 14111 is inserted into the first positive terminal 1441, the second positive pin 14113 is inserted into the second positive terminal 1443, the first negative pin 14112 is inserted into the first negative terminal 1443, and the second negative pin 14114 is inserted into the second negative terminal 1444. At this time, the first battery pack and the second battery pack form a parallel structure, the total positive output terminal 1131 is connected to the second positive terminal 1443, and the total negative output terminal 1132 is connected to the first negative terminal 1442, achieving low voltage output.

[0078] See Figure 11 When the switching mechanism 14 is in the second position, the third positive pin 14115 is inserted into the third positive terminal 1445, and the third negative pin 14116 is inserted into the third negative terminal 1446. At this time, the first battery pack and the second battery pack form a series structure, the total positive output terminal 1131 is connected to the second positive terminal 1443, and the total negative output terminal 1132 is connected to the first negative terminal 1442, achieving high voltage output. Example

[0079] See Figure 17-28 One embodiment of the present application provides a battery pack 100A for selectively connecting to a first power tool 200A or a second power tool. The first power tool 200A operates at a first voltage, while the second power tool operates at a second voltage, where the first voltage is different from the second voltage. The battery pack 100A includes a housing 11A, a battery assembly 12A disposed within the housing 11A, and a locking mechanism movably assembled within the housing.

[0080] In this embodiment, see Figure 17 and Figure 18The housing 11A includes an upper housing and a lower housing, which combine to form a housing for accommodating the battery pack 12A. The housing 11A may also have a coupling portion 113A, through which the battery pack 100A can be selectively connected to the first power tool 200A or the second power tool. Specifically, both the first power tool 200A and the second power tool may be provided with a battery connection portion that couples with the coupling portion 113A. Guide rails may be provided on both sides of the coupling portion 113A, and the battery connection portion may be provided with corresponding slide grooves that mate with the guide rails. The cooperation of the guide rails and the slide grooves facilitates smooth mating between the first power tool 200A or the second power tool and the battery pack 100A. The battery connection portion may be provided with a locking slot, and the locking mechanism may include an operating member, a locking member connected to the operating member, and a biasing member (such as a spring) for providing support for the operating member. The locking member may couple with the locking slot of the battery connection portion to lock the battery pack 100A to the first power tool 200A or the second power tool. The operating member can move the locking member to disengage the locking member from the locking slot, thereby disconnecting the battery pack 100A from the first power tool 200A or the second power tool. The coupling portion 113A can be provided with a voltage output portion having a positive output terminal and a negative output terminal for outputting a voltage to an external source, which can be selectively used to power the connected power tool.

[0081] The battery assembly 12A includes a first battery pack, a second battery pack, and a battery bracket for fixing the first battery pack and the second battery pack. The first battery pack is composed of a plurality of battery cells connected in series and has a first positive electrode and a first negative electrode. The second battery pack is also composed of a plurality of battery cells connected in series and has a second positive electrode and a second negative electrode. In this embodiment, the number of battery cells of the first battery pack can be configured to be 5, and the number of battery cells of the second battery pack can also be configured to be 5. Of course, those skilled in the art will understand that in order to adapt to different working conditions, the number of battery cells here can be other numbers. Of course, replacement of different numbers is also protected by this application.

[0082] See Figure 19 , the battery pack 100A also includes a switching mechanism 14A. The switching mechanism 14A includes a switching member 141A and a pushed member 142A connected to the switching member 141A. The switching member 141A cooperates with the pushed member 142A. In other embodiments, the switching member 141A can be designed as an integral part of the pushed member 142A. The switching member 141A includes a switching plate 1411A and a switching terminal. The switching plate 1411A is provided with a plurality of positioning grooves for cooperating with the pushed member 142A.

[0083] See Figure 19In this embodiment, the pushed member 142A comprises a pushed plate 1421A, a positioning bar connected to the bottom of the pushed plate 1421A, a first pushed block 1423A and a second pushed block 1424A protruding from the upper surface of the pushed plate 1421A. The pushed plate 1421A has a limiting hole 14210A. The positioning bar is provided with barbs, which pass through corresponding positioning slots of the switching plate 1411A and, with the aid of the barbs, enable the assembly connection between the switching member 141A and the pushed member 142A. The switching member 141A and the pushed member 142A can move synchronously along the length of the battery pack. In this embodiment, there are two first pushed blocks 1423A and two second pushed blocks 1424A. The spacing between the two first pushed blocks 1423A in the width direction of the battery pack 100A is greater than the spacing between the two second pushed blocks 1424A in the width direction of the battery pack 100A.

[0084] See Figure 17 and Figure 18, the coupling portion 113A is provided with a receiving groove 1130A for accommodating the pushed member 142A. The coupling portion 113A is divided into a front section and a rear section. The front section is a section of the coupling portion 113A away from the locking mechanism, and the rear section is a section of the coupling portion 113A away from the locking mechanism. The front section of the coupling portion 113A is provided with a recessed portion for making way when docking with the first power tool 200A. After the pushed member 142A is accommodated in the receiving groove 1130A, the upper surface of the first pushed block 1423A and / or the second pushed block 1424A is higher than the upper surface of the recessed portion of the coupling portion 113A. In this embodiment, after the pushed member 142A is accommodated in the receiving groove 1130A, the upper surface of the rear section of the coupling portion 113A is not lower than the upper surface of the first pushed block 1423A or the second pushed block 1424A, and is higher than the upper surface of the recessed portion of the coupling portion 113A. The switching mechanism 14A has a first position and a second position. The first position is when the pushed member 142A is located at the front end of the receiving groove 1130A, and the second position is when the pushed member 142A is located at the rear end of the receiving groove 1130A. At least a portion of the upper surface of the front section of the coupling portion 113A is higher than the upper surface of the pushed member 142A. When the switching mechanism 14A is in the first position, the raised portion is further forward than the first pushed block 1423A and / or the second pushed block 1424A to prevent the first pushed block 1423A and / or the second pushed block 1424A from being accidentally touched when the battery pack 100A is docked with the second power tool. The receiving groove 1130A has a first guide protrusion 11300A protruding from the bottom surface. The first guide protrusion 11300A passes through the limiting hole 14210A and protrudes from the upper surface of the pushed plate 1421A. The cross-section of the first guide protrusion 11300A is triangular. In other embodiments, the cross-section of the first guide protrusion 11300A can be an arc or other shape that facilitates guidance. The projections of the first guide protrusion 11300A, the two first pushed blocks 1423A, and the two second pushed blocks 1424A in the width direction of the battery pack 100A do not overlap. The receiving groove 1130A of the coupling portion 113A also has a plurality of limiting grooves 11301A through which the positioning bar passes.

[0085] See Figure 20 、 Figure 21 and Figure 22In this embodiment, the battery connection portion of the first electric tool 200A has a pushing member 21A and a step portion 22A. The pushing member 21A includes a pushing member 211A and an elastic member 212A that pushes the pushing member 211A downward. The pushing member 211A protrudes downward from the bottom surface of the battery connection portion of the first electric tool 200A and can float up and down. The pushing member 211A includes a pushing block 2111A and a second guide protrusion 2112A. In this embodiment, in order for the pushing block 2111A to smoothly pass over the first pushed block 1423A, a guide surface is provided at the rear end of the pushing block 2111A and / or the front end of the first pushed block 1423A. In order to ensure the stability of the pushing, a vertical surface is provided at the rear front end of the pushing block 2111A and / or the rear end of the first pushed block 1423A. In other embodiments, a guide surface is provided at the front end of the pushing block 2111A and / or the rear end of the first pushed block 1423A. There are two pushing blocks 2111A, and the second guide protrusion 2112A is located between the two pushing blocks 2111A. The projections of the second guide protrusion 2112A and the two pushing blocks 2111A in the width direction of the first power tool 200A do not overlap. The cross-section of the second guide protrusion 2112A is triangular. In other embodiments, the cross-section of the second guide protrusion 2112A can be an arc shape or other shapes that are convenient for guiding. In order to ensure that the pushing block 2111A smoothly passes over the first pushed block 1423A, the size of the second guide protrusion 2112A protruding from the battery connecting part is not less than the size of the protruding from the battery connecting part of the pushing block 2111A.

[0086] See Figures 23 to 26 In one embodiment, when the battery pack 100A is plugged into the first power tool 200A, the guide rails of the battery pack 100A engage with the guide slots of the first power tool 200A. Due to the low insertion and removal force of the switching terminal, the first pushed block 1423A is pushed against the pushing block 2111A, thereby pushing the pushed member 142A backward relative to the battery pack 100A housing 11A. When the pushed member 142A is pushed to the rear end of the receiving slot 1130A, the first pushed block 1423A pushes against the pushing block 2111A. The pushing block 2111A drives the pushing member 211A to compress the elastic member 212A, causing the pushing member 21A to move upward, thereby causing the pushing block 2111A to pass over the first pushed block 1423A and position itself behind the first pushed block 1423A. At this point, the switching mechanism 14A is in the second position, and the battery pack 100A can achieve high voltage output.

[0087] In another embodiment, when the battery pack 100A is plugged into the first power tool 200A, the guide rail of the battery pack 100A is plugged into the slide groove of the first power tool 200A. Due to the large plug-in and pull-out force of the switching terminal, the first pushed block 1423A first abuts against the pushing block 2111A. The first pushed block 1423A pushes the pushing block 2111A. The pushing block 2111A can drive the pushing member 211A to compress the elastic member 212A to realize the upward movement of the pushing member 21A, thereby causing the pushing block 2111A to pass over the first pushed block 1423A and be located behind the first pushed block 1423A. Then, the second pushed block 1424A is pushed by the step portion 22A, and the pushed member 142A is pushed and moves backward relative to the battery pack 100A shell 11A until the pushed member 142A is pushed to the rear end of the receiving slot 1130A. At this time, the switching mechanism 14A is located in the second position, and the battery pack 100A can achieve high voltage output.

[0088] In other preferred embodiments, the second guiding protrusion 2112A cooperates with the first guiding protrusion 11300A to enable the pushing block 2111A to pass over the first pushed block 1423A and be located behind the first pushed block 1423A.

[0089] See Figure 27 and Figure 28 When the battery pack 100A is disengaged from the first power tool 200A, the first pushed block 1423A is pushed against the pushing block 2111A, thereby pushing the pushed member 142A forward relative to the battery pack 100A housing 11A. When the pushed member 142A approaches the front end of the receiving slot 1130A, the second guide protrusion 2112A abuts the first guide protrusion 11300A. The second guide protrusion 2112A compresses the elastic member 212A, causing the pushing member 21A to move upward, thereby causing the pushing block 2111A to pass over the first pushed block 1423A and position itself in front of the first pushed block 1423A. At this point, the switching mechanism 14A is in the first position, and the battery pack 100A can achieve low-voltage output.

[0090] In other preferred embodiments, the front end of the pushing block 2111A and / or the rear end of the first pushed block 1423A are provided with a guide surface. When the pushed member 142A is pushed to the front end of the receiving groove 1130A, the first pushed block 1423A pushes the pushing block 2111A. The pushing block 2111A can drive the pushing member 211A to compress the elastic member 212A, thereby moving the pushing member 21A upward, thereby causing the pushing block 2111A to pass over the first pushed block 1423A and be located in front of the first pushed block 1423A.

[0091] As described above, when the battery pack 100A is connected to the first power tool 200A, it automatically switches to a high-voltage output state. When disconnected from the first power tool 200A, the battery pack 100A automatically switches to a low-voltage output state. When connected to a second power tool, the battery pack 100A outputs a low voltage. Therefore, the battery pack 100A automatically matches the corresponding power tool and provides the corresponding voltage output.

[0092] In a preferred embodiment, the first guiding protrusion 11300A is higher than the first pushed block 1423A and / or the second guiding protrusion 2112A is higher than the pushing block 2111A, so that the pushing block 2111A can smoothly pass over the first pushed block 1423A during the coupling process.

[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 for connecting to a first power tool or a second power tool, wherein: The working voltage of the first power tool is a first voltage, and the working voltage of the second power tool is a second voltage, the first voltage is different from the second voltage, and it is characterized in that the battery pack includes a shell and a battery assembly arranged in the shell; the shell is provided with a coupling portion for matching; the battery assembly includes a first battery group, a second battery group and a battery bracket for fixing the first battery group and the second battery group; the first battery group has a first positive pole and a first negative pole, and the second battery group has a second positive pole and a second negative pole; the battery pack also includes a switching mechanism, the switching mechanism has a first position and a second position, when the battery pack is plugged into the first power tool, the switching mechanism is pushed to the second position by the first power tool, and the battery pack outputs the first voltage; when the battery pack is disconnected from the first power tool, the switching mechanism is pushed to the first position by the first power tool, and the battery pack outputs the second voltage.

2. The battery pack according to claim 1, wherein: When the battery pack is plugged into the second electric tool, the second electric tool avoids pushing against the switching mechanism.

3. The battery pack according to claim 1 or 2, characterized in that: The switching mechanism includes a pushed member and a limiting member; the pushed member has a pushed plate, the pushed plate has a limiting hole, and the limiting member is limited in the limiting hole; when the switching mechanism is in a first position, the limiting member does not protrude from the upper surface of the pushed plate, and when the switching mechanism is in a second position, the limiting member protrudes from the upper surface of the pushed plate.

4. The battery pack according to claim 3, wherein: The limiting member is driven by the pushed plate and moves along the length direction of the battery pack; the coupling portion is provided with a receiving groove for accommodating the pushed member, the receiving groove is provided with a sliding groove, the limiting member is at least partially accommodated in the sliding groove, the sliding groove has a first step surface, a second step surface and a connecting surface connecting the first step surface and the second step surface, the first step surface is lower than the second step surface, and the connecting surface is an inclined surface; when the limiting member abuts against the first step surface, the limiting member does not protrude from the upper surface of the pushed member, and when the limiting member abuts against the second step surface, the limiting member protrudes from the upper surface of the pushed member.

5. The battery pack according to claim 4, characterized in that: The first step surface and the second step surface are smoothly transitioned to the connecting surface; and the bottom of the limiting member is at least partially designed to be an arc.

6. The battery pack according to claim 4, characterized in that: The sliding groove is provided with a guide groove, and the limiting member is provided with a guide column, and the guide column cooperates with the guide groove.

7. The battery pack according to claim 4, characterized in that: The combined portion is divided into a front section and a rear section; the front section of the combined portion is provided with a recessed portion, and after the pushed member is received in the receiving groove, the upper surface of the pushed member is higher than the upper surface of the recessed portion; At least a portion of the upper surface of the front section of the coupling portion is higher than the upper surface of the pushed member and is further forward than the switching mechanism when it is located at the first position.

8. The battery pack according to claim 3, wherein: The switching mechanism includes a switching member, which cooperates with the pushed member; the switching member includes a switching plate, which is provided with a positioning groove, and the pushed member has a positioning bar connected to the bottom of the pushed plate, and the positioning bar passes through the positioning groove; the positioning bar is provided with a barb.

9. The battery pack according to claim 8, characterized in that: The switching member includes a switching terminal, and the switching terminal includes a switching plug terminal and a switching socket terminal; the switching plug terminal includes a first positive pin, a first negative pin, a second positive pin, a second negative pin, a third positive pin and a third negative pin fixed on the switching board, and the first positive pin, the first negative pin, the second positive pin, the second negative pin, the third positive pin and the third negative pin are insert-molded in the switching member; the first positive pin and the second positive pin are electrically connected, the first negative pin and the second negative pin are electrically connected, and the third positive pin and the third negative pin are electrically connected; the switching socket terminal includes a first positive terminal, a first negative terminal, a third positive pin and a third negative pin fixed in the combining portion two positive terminals, a second negative terminal, a third positive terminal and a third negative terminal; the first positive terminal, the first negative terminal, the second positive terminal, the second negative terminal, the third positive terminal and the third negative terminal are all clip-type wiring terminals; the first positive terminal and the third positive terminal are both connected to the first positive pole, the first negative terminal is connected to the first negative pole, the second positive terminal is connected to the second positive pole, and the second negative terminal and the third negative terminal are both connected to the second negative pole; the first positive pin, the first negative pin, the second positive pin, the second negative pin, the third positive pin and the third negative pin correspond one-to-one to the first positive terminal, the first negative terminal, the second positive terminal, the second negative terminal, the third positive terminal and the third negative terminal.

10. A power tool system, characterized in that: The system includes a first electric tool and a battery pack as described in any one of claims 3-9; the first electric tool has a limiting recess and a step portion; the limiting recess can accommodate the limiting member; the step portion can push the pushed plate.

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