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 electric tools, in particular to a battery pack and an electric tool system. BACKGROUND

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

[0003] With the increasing popularity of electric tools, more and more electric tools are applied to different scenarios. In order to adapt to different scenarios, electric tools need corresponding performance requirements, so the power source and energy source are more diverse, such as the battery needs to be designed to match the high voltage and low voltage.

[0004] However, how to realize the universality of the battery without the electric tool to improve the convenience has become an industry problem. UTILITY MODEL CONTENT

[0005] In one embodiment, a battery pack is provided for connecting with a first electric tool or a second electric tool, wherein the working voltage of the first electric tool is a first voltage, the working voltage of the second electric tool is a second voltage, the first voltage is different from the second voltage, and the battery pack comprises a shell, a battery assembly arranged in the shell, and a locking mechanism movably assembled in the shell; the shell is provided with a combination part for connection; the battery assembly comprises a first battery pack and a second battery pack; the first battery pack has a first positive electrode and a first negative electrode, and the second battery pack has a second positive electrode and a second negative electrode; the battery pack further comprises a switching mechanism having a first position and a second position; when the battery pack is plugged with the first electric tool, the switching mechanism is pushed to the second position by the first electric tool, and the battery pack outputs the first voltage; when the battery pack is disconnected from the first electric tool, the switching mechanism is pushed to the first position by the first electric tool, and the battery pack outputs the second voltage.

[0006] Optionally, when the battery pack is plugged with the second electric tool, the second electric tool avoids pushing the switching mechanism.

[0007] Optionally, the switching mechanism comprises a pusher, the pusher has a push plate and a first push block protruding from the upper surface of the push plate.

[0008] Optionally, the pusher has a second push block protruding from the upper surface of the push plate; the coupling portion has a front section and a rear section; the front section of the coupling portion is provided with a recess, the upper surface of the second push block is higher than the upper surface of the recess of the coupling portion; the rear end of the first push block is provided with a guide surface, and the front end of the first push block is provided with a vertical surface.

[0009] Optionally, the projections of the first push block and the second push block in the width direction of the battery pack do not overlap.

[0010] Optionally, the coupling portion has a front section and a rear section; the front section of the coupling portion is provided with a recess, the upper surface of the first push block is higher than the upper surface of the recess of the coupling portion, at least part of the upper surface of the front section of the coupling portion is higher than the upper surface of the pusher, and the aforementioned raised portion is located further forward than the switching mechanism in the first position; the front end of the first push block is provided with a guide surface.

[0011] Optionally, the coupling portion is provided with a receiving groove, the pusher is received in the receiving groove, and a first guide protrusion protrudes from the bottom surface of the receiving groove; the first guide protrusion is not lower than the first push block.

[0012] Optionally, the switching mechanism comprises a switching member, the switching member is linked and matched with the pusher; the switching member comprises a switching plate, the switching plate is provided with a positioning groove, the pusher has a positioning strip connected to the lower surface of the push plate, and the positioning strip passes through the positioning groove; the positioning strip is provided with a barb.

[0013] In another embodiment, an electric tool system is provided, the system comprises 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 comprises a pusher and an elastic member pushing the pusher downward, the pusher protrudes downward from the bottom surface of the battery connecting portion of the first electric tool; the pusher comprises a push block, and the push block can push the first push block.

[0014] Optionally, the battery connecting portion of the first electric tool has a stepped portion; the pusher comprises a second guide protrusion.

[0015] Compared with the prior art, when the battery pack is plugged into the first electric tool, it can automatically switch to a high-voltage output state; after the battery pack is disconnected from the first electric tool, it can automatically switch to a low-voltage output state. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The overall structure of the battery pack in Embodiment One of the present application is shown in the figure below.

[0017] Figure 2 The exploded view of the upper shell and switching structure of the battery pack in Embodiment One of the present application is shown in the figure below.

[0018] Figure 3 The structure of the upper shell of the battery pack in Embodiment One of the present application is shown in the figure below.

[0019] Figure 4 The structure of the switching mechanism of the battery pack in Embodiment One of the present application is shown in the figure below.

[0020] Figure 5 The exploded view of the switching piece of the battery pack in Embodiment One of the present application is shown in the figure below.

[0021] Figure 6 The structure of the switching piece of the battery pack in Embodiment One of the present application is shown in the figure below.

[0022] Figure 7 The structure of the limiting piece of the battery pack in Embodiment One of the present application is shown in the figure below.

[0023] Figure 8 The cross-sectional view of the upper shell and switching structure of the battery pack in Embodiment One of the present application is shown in the figure below (first position).

[0024] Figure 9 The cross-sectional view of the upper shell and switching structure of the battery pack in Embodiment One of the present application is shown in the figure below (second position).

[0025] Figure 10 The cross-sectional view of the battery pack in Embodiment One of the present application is shown in the figure below (first position).

[0026] Figure 11 The cross-sectional view of the battery pack in Embodiment One of the present application is shown in the figure below (second position).

[0027] Figure 12 The first cross-sectional view of the battery pack and the first power tool in Embodiment One of the present application is shown in the figure below.

[0028] Figure 13 The second cross-sectional view of the battery pack and the first power tool in Embodiment One of the present application is shown in the figure below.

[0029] Figure 14 The first cross-sectional view of the battery pack and the first power tool in Embodiment One of the present application is shown in the figure below.

[0030] Figure 15 The second cross-sectional view of the battery pack and the first power tool in Embodiment One of the present application is shown in the figure below.

[0031] Figure 16Figure 8 is a cross-sectional view of the battery pack and the second power tool being plugged in according to an embodiment of the present application;

[0032] Figure 17 Figure 9 is a schematic diagram of the overall structure of the battery pack according to an embodiment of the present application;

[0033] Figure 18 Figure 10 is a schematic diagram of the upper housing of the battery pack according to an embodiment of the present application;

[0034] Figure 19 Figure 11 is a schematic diagram of the switching mechanism of the battery pack according to an embodiment of the present application;

[0035] Figure 20 Figure 12 is a schematic diagram of the first power tool according to an embodiment of the present application;

[0036] Figure 21 Figure 13 is a schematic diagram of the pushing member of the first power tool according to an embodiment of the present application;

[0037] Figure 22 Figure 14 is another schematic diagram of the pushing member of the first power tool according to an embodiment of the present application;

[0038] Figure 23 Figure 15 is a first cross-sectional view of the battery pack and the first power tool being plugged in according to an embodiment of the present application;

[0039] Figure 24 Figure 16 is an enlarged view of the first cross-sectional view of the battery pack and the first power tool being plugged in according to an embodiment of the present application;

[0040] Figure 25 Figure 17 is a second cross-sectional view of the battery pack and the first power tool being plugged in according to an embodiment of the present application;

[0041] Figure 26 Figure 18 is an enlarged view of the second cross-sectional view of the battery pack and the first power tool being plugged in according to an embodiment of the present application;

[0042] Figure 27 Figure 19 is a first cross-sectional view of the battery pack and the first power tool being unplugged according to an embodiment of the present application;

[0043] Figure 28 Figure 20 is an enlarged view of the second cross-sectional view of the battery pack and the first power tool being unplugged according to an embodiment of the present application. DETAILED DESCRIPTION

[0044] In order to make the above objectives, features and advantages of the present application more clear and understandable, the detailed description of the embodiments of the present application is made below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in many different ways from what is described herein, and with the same or similar results, and by one of ordinary skill in the art without departing from the scope of the present application, and therefore the present application is not limited to the details described below.

[0045] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0046] In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0047] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0048] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0049] It is to be understood that when an element such as a layer, region or substrate is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element or intervening elements can be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements present. It will be understood that, when a part is referred to as being "formed on" or "formed on" another part, it can be directly formed on or formed on the other part or intervening elements can be present. It will be understood that the terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar expressions are used for explanation only and are not intended to be limiting. Embodiment

[0050] Referring to Figures 1-16 , the battery pack 100 is provided for selectively connecting with the first power tool 200 or the second power tool 300, wherein the working voltage of the first power tool 200 is a first voltage, the working voltage of the second power tool 300 is a second voltage, and the first voltage is different from the second voltage. The battery pack 100 comprises a housing 11, a battery assembly 12 arranged in the housing 11, and a locking mechanism movably assembled in the housing.

[0051] In the embodiment, the housing 11 comprises an upper housing 111 and a lower housing 112, which are combined to form a receiving space for receiving the battery assembly 12. Details Figures 1-2 , the housing 11 can also have a combination part 113, and the battery pack 100 can be selectively connected with the first power tool 200 or the second power tool 300 through the combination part 113. Specifically, the first power tool 200 and the second power tool 300 can each be provided with a battery connecting part combined with the combination part 113. The combination part 113 can be provided with guide rails on both sides, and the battery connecting part can be provided with sliding grooves corresponding to the guide rails. Through the cooperation of the guide rails and the sliding grooves, the first power tool 200 or the second power tool 300 can be smoothly connected with the battery pack 100. The battery connecting part can be provided with a locking groove, and the locking mechanism can be provided with an operating member 131, a locking member 132 connected with the operating member 131, and a biasing member (such as a spring, etc.) for providing a supporting force to the operating member 131. The locking member 132 can be combined with the locking groove of the battery connecting part to lock the battery pack 100 with the first power tool 200 or the second power tool 300. The operating member 131 can drive the locking member 132 to move, so that the locking member 132 is separated from the locking groove, and the battery pack 100 can be separated from the first power tool 200 or the second power tool 300. The combination part 113 can be provided with a voltage output part having a total positive output end 1131 and a total negative output end 1132 for externally outputting voltage, and can be selectively used for supplying power to the connected power tool.

[0052] The battery assembly 12 comprises a first battery pack, a second battery pack and a battery support 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, and 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 the embodiment, the number of battery cells of the first battery pack can be configured as 5, and the number of battery cells of the second battery pack can also be configured as 5. Of course, those skilled in the art can understand that the number of battery cells can be other numbers in order to adapt to different working conditions, and of course, different numbers of replacement are also within the protection scope of the present application.

[0053] For details Figure 2 and Figure 4 The battery pack 100 further comprises a switching mechanism 14. The switching mechanism 14 comprises a switching piece 141, a pushed piece 142 connected to the switching piece 141 and a limiting piece 143. The switching piece 141 is linked with the pushed piece 142, and in other embodiments, the switching piece 141 can be designed integrally with the pushed piece 142. For details Figure 5 and Figure 6 The switching piece 141 comprises a switching plate 1411 and a switching terminal. The switching plate 1411 is provided with a plurality of positioning grooves 14110 for linked cooperation with the pushed piece 142.

[0054] For details Figure 2 and Figure 4 The pushed piece 142 has a pushed plate 1421 and a positioning strip 1422 connected below the pushed plate 1421. The pushed plate 1421 has a limiting hole 14210. The limiting piece 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 strip 1422 is provided with a barb, the plurality of positioning strips 1422 pass through the corresponding positioning grooves 14110 of the switching plate 1411, and the assembly connection of the switching piece 141 and the pushed piece 142 is realized by the barb, and the switching piece 141 and the pushed piece 142 can realize synchronous movement along the length direction of the battery pack.

[0055] For details 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.

[0056] 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.

[0057] See Figure 3 、 Figure 8 and Figure 9The limiting member 143 is at least partially accommodated in the sliding groove 11302. Under the drive of the push 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 out of the upper surface of the push member 142. When the limiting member 143 abuts against the second step surface, the limiting member 143 protrudes out of the upper surface of the push 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 connected with the connecting surface. Further, the bottom of the limiting member 143 is at least partially designed as a circular 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 which cooperates with the guide groove 11303 to realize the smooth movement of the limiting member 143 along the expected trajectory.

[0058] The battery connecting portion of the first electric tool 200 is provided with a limiting recess 21 and a step portion 22. The limiting recess 21 can correspondingly accommodate the limiting member 143.

[0059] For details Figure 12 and Figure 13 The arrow direction in the figure is the movement direction of the battery pack 100. When the battery pack 100 is connected with the first electric tool 200, the guide rail of the battery pack 100 is connected with the sliding groove of the first electric tool 200. When the push 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 push plate 1421 is pushed by the step portion 22 and moves backward relative to the shell 11 of the battery pack 100, the limiting member 143 is driven by the push plate 1421 to move backward relative to the shell 11 of the battery pack 100, and then gradually protrudes out of the upper surface of the push plate 1421 under the guidance of the connecting surface and enters the limiting recess 21. When the push plate 1421 is further accommodated in the groove 1130 relative to the shell 11 of the battery pack 100, 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 at the second position, and the battery pack 100 can realize high-voltage output (for details, please refer to the following description).

[0060] For details Figure 14 and Figure 15When the battery pack 100 is disengaged from the first power tool 200, the limiting recess 21 limits the limiting member 143, the limiting member 143 moves forward relative to the shell 11 of the battery pack 100, the limiting member 143 further drives the pushed plate 1421 to move forward relative to the shell 11 of the battery pack 100, in the foregoing process, the limiting member 143 gradually moves downward under the guidance of the connecting surface; when the pushed plate 1421 is further limited by the receiving groove 1130 and moves forward relative to the shell 11 of the battery pack 100, the limiting member 143 abuts at the first step surface, and the limiting member 143 is disengaged from the limiting recess 21, and the battery pack 100 can be disengaged from the first power tool 200. At this time, the switching mechanism 14 is located at the first position, and the battery pack 100 can realize low-voltage output (for details, see the following description).

[0061] As described above, when the battery pack 100 is plugged with the first power tool 200, it can be automatically switched to a high-voltage output state; after the battery pack 100 is disengaged from the first power tool 200, it can be automatically switched to a low-voltage output state. When the battery pack 100 is plugged with the second power tool 300, the battery pack 100 can output low voltage. Therefore, the battery pack 100 can automatically match the corresponding power tool and provide corresponding voltage output.

[0062] In order to avoid the limiting member 143 from being hard abutted with the first power tool 200 or the second power tool 300 in special cases, the limiting member 143 is provided with a guide portion at the upper front end.

[0063] The switching terminal includes a switching plug terminal and a switching socket terminal.

[0064] 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 fixed on the switching plate 1411, which can be insert-molded in the switching member 141. Of course, it can be understood that other mounting methods can also be used. In addition, the first positive pin 14111 and the second positive pin 14113 are in electrical connection, the first negative pin 14112 and the second negative pin 14114 are in electrical connection, and the third positive pin 14115 and the third negative pin 14116 are in electrical connection.

[0065] 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 fixed in the joint 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-pin terminals, the first positive terminal 1441 and the third positive terminal 1445 are 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.

[0066] 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.

[0067] 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, and 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, the first positive pin 14111, the second positive pin 14113, the first negative pin 14112, and the second negative pin 14114 can be arranged side by side in the same direction along the width direction of the shell 1, and the third positive pin 14115 and the third negative pin 14116 can be arranged side by side in the same direction along the width direction of the shell 1, the second positive pin 14113 and the third positive pin 14115 are arranged opposite to each other, and the first negative pin 14112 and the third negative pin 14116 are arranged opposite to each other. The switching piece 141 slides between the first axis and the second axis, so that the switching mechanism 14 can be in the first position or the second position.

[0068] For details 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 1442, 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 end 1131 is connected to the second positive terminal 1443, the total negative output end 1132 is connected to the first negative terminal 1442, and low-voltage output is achieved.

[0069] For details 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 end 1131 is connected to the second positive terminal 1443, the total negative output end 1132 is connected to the first negative terminal 1442, and high-voltage output is achieved. Embodiment

[0070] For details Figures 17-28 An embodiment of the present application provides a battery pack 100A for selectively connecting with a first power tool 200A or a second power tool. The working voltage of the first power tool 200A 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. The battery pack 100A includes a housing 11A, a battery assembly 12A arranged in the housing 11A, and a locking mechanism movably arranged in the housing.

[0071] In this embodiment, for details Figure 17 and Figure 18The shell 11A includes an upper shell and a lower shell which combine to form a receiving space for receiving the battery assembly 12A. The shell 11A can also have a combination portion 113A through which the battery pack 100A is selectively connectable to the first power tool 200A or the second power tool. Specifically, the first power tool 200A and the second power tool can each be provided with a battery connecting portion which is combined with the combination portion 113A. The combination portion 113A can be provided with guide rails on both sides thereof, and the battery connecting portion can be correspondingly provided with sliding grooves which are adapted to the guide rails. Through the cooperation of the guide rails and the sliding grooves, the first power tool 200A or the second power tool is facilitated to be smoothly connected with the battery pack 100A. The battery connecting portion can be provided with a locking groove, and the locking mechanism is provided with an operating member, a locking member connected with the operating member, and a biasing member (such as a spring, etc.) for providing a supporting force to the operating member. The locking member can be combined with the locking groove of the battery connecting portion to lock the battery pack 100A with the first power tool 200A or the second power tool. The operating member can drive the locking member to move so as to make the locking member disengage from the locking groove, and the battery pack 100A can be disconnected with the first power tool 200A or the second power tool. The combination portion 113A can be provided with a voltage output portion which has a total positive output end and a total negative output end for externally outputting voltage and can be selectively used to supply power to the connected power tool.

[0072] The battery assembly 12A includes a first battery pack, a second battery pack, and a battery support 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, and 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. However, it should be understood by those skilled in the art that the number of battery cells can be other numbers in order to adapt to different working conditions, and of course, different numbers of replacement are also within the protection scope of the present application.

[0073] For details Figure 19 The battery pack 100A further 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 is linked and cooperated with the pushed member 142A, and in other embodiments, the switching member 141A can be designed integrally with 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 linked cooperation with the pushed member 142A.

[0074] For details Figure 19In the embodiment, the pushed member 142A has a pushed plate 1421A, positioning bars connected to the lower side 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 bars are provided with barbs, the plurality of positioning bars pass through the corresponding positioning grooves of the switching plate 1411A, and the barbs assist the assembly connection of the switching member 141A and the pushed member 142A, so that the switching member 141A and the pushed member 142A can synchronously move along the length direction of the battery pack. In the embodiment, the first pushed block 1423A has two, and the second pushed block 1424A has two. The spacing of the two first pushed blocks 1423A in the width direction of the battery pack 100A is greater than the spacing of the two second pushed blocks 1424A in the width direction of the battery pack 100A.

[0075] For details 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.

[0076] See Figure 20 、 Figure 21 and Figure 22In the present embodiment, the battery connecting portion of the first power tool 200A has a pushing member 21A and a step portion 22A. The pushing member 21A includes a pushing piece 211A and an elastic piece 212A that pushes the pushing piece 211A downward. The pushing piece 211A protrudes downward from the bottom surface of the battery connecting portion of the first power tool 200A and can float up and down. The pushing piece 211A includes a pushing block 2111A and a second guide protrusion 2112A. In the present embodiment, in order for the pushing block 2111A to smoothly pass the first pushed block 1423A, the rear end of the pushing block 2111A and / or the front end of the first pushed block 1423A is provided with a guide surface. In order to ensure the stability of the pushing, the front and rear ends of the pushing block 2111A and / or the rear end of the first pushed block 1423A is provided with a vertical surface. In other embodiments, the front end of the pushing block 2111A and / or the rear end of the first pushed block 1423A is provided with a guide surface. The pushing block 2111A has two, and the second guide protrusion 2112A is located between the two pushing blocks 2111A. The projection of the second guide protrusion 2112A and the two pushing blocks 2111A in the width direction of the first power tool 200A does 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 a circular arc or other shapes that facilitate guidance. In order to ensure that the pushing block 2111A smoothly passes the first pushed block 1423A, the size of the second guide protrusion 2112A protruding from the battery connecting portion is not less than the size of the pushing block 2111A protruding from the battery connecting portion.

[0077] For details Figures 23 to 26 In one 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 sliding groove of the first power tool 200A. Due to the small plug-in force of the switching terminal, the first pushed block 1423A is pushed by the pushing block 2111A, and then the pushing piece 142A is pushed to move backward relative to the shell 11A of the battery pack 100A. When the pushing piece 142A is pushed to the rear end of the accommodation groove 1130A, the first pushed block 1423A pushes the pushing block 2111A, and the pushing block 2111A can drive the pushing piece 211A to compress the elastic piece 212A to realize the upward movement of the pushing member 21A, and then the pushing block 2111A passes the first pushed block 1423A and is located behind the first pushed block 1423A. At this time, the switching mechanism 14A is located at the second position, and the battery pack 100A can realize high-voltage output.

[0078] In another embodiment, when the battery pack 100A is plugged with the first power tool 200A, the battery pack 100A guide rail is inserted into the first power tool 200A sliding groove. Due to the large plug-in 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 drives the pushing member 21A to compress the elastic member 212A to move upward, and then the pushing block 2111A is located behind the first pushed block 1423A. Then, the second pushed block 1424A is pushed by the step part 22A, and then the pushing member 142A is pushed to move backward relative to the battery pack 100A housing 11A until the pushing member 142A is pushed to the rear end of the accommodation groove 1130A. At this time, the switching mechanism 14A is located at the second position, and the battery pack 100A can realize high-voltage output.

[0079] In other preferred embodiments, the second guide block 2112A cooperates with the first guide block 11300A to make the pushing block 2111A located behind the first pushed block 1423A.

[0080] For details Figure 27 and Figure 28 When the battery pack 100A is separated from the first power tool 200A, the first pushed block 1423A is pushed by the pushing block 2111A, and then the pushing member 142A is pushed to move forward relative to the battery pack 100A housing 11A. When the pushing member 142A is pushed close to the front end of the accommodation groove 1130A, the second guide block 2112A abuts against the first guide block 11300A, and the second guide block 2112A can compress the elastic member 212A to move the pushing member 21A upward, and then the pushing block 2111A is located in front of the first pushed block 1423A. At this time, the switching mechanism 14A is located at the first position, and the battery pack 100A can realize low-voltage output.

[0081] In other preferred embodiments, the front end of the pushing block 2111A and / or the rear end of the first pushed block 1423A is provided with a guide surface, and the rear end of the pushing block 2111A and / or the front end of the first pushed block 1423A is provided with a guide surface. When the pushing member 142A is pushed to the front end of the accommodation groove 1130A, the first pushed block 1423A pushes the pushing block 2111A, the pushing block 2111A drives the pushing member 21A to compress the elastic member 212A to move upward, and then the pushing block 2111A is located in front of the first pushed block 1423A.

[0082] As described above, the battery pack 100A can automatically switch to the high-voltage output state when the battery pack 100A is plugged into the first power tool 200A, and can automatically switch to the low-voltage output state when the battery pack 100A is unplugged from the first power tool 200A. When the battery pack 100A is plugged into the second power tool, the battery pack 100A can output low voltage. Therefore, the battery pack 100A can automatically match the corresponding power tool and provide the corresponding voltage output.

[0083] In a preferred embodiment, the first guide protrusion 11300A is higher than the first pushed block 1423A and / or the second guide protrusion 2112A is higher than the pushed block 2111A, so that the pushed block 2111A can smoothly pass the first pushed block 1423A during the combination process.

[0084] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but it should be considered that any combination of the technical features is within the scope of the present disclosure as long as the combination does not result in contradictions.

[0085] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these are all within the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to 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, a battery assembly arranged in the shell and a locking mechanism movably assembled 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.

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 having a pushed plate and a first pushed block protruding from the upper surface of the pushed plate.

4. The battery pack according to claim 3, wherein: 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.

5. The battery pack according to claim 4, characterized in that: The projections of the first pushed block and the second pushed block in the width direction of the battery pack do not overlap.

6. The battery pack according to claim 3, characterized in that: 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 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.

7. The battery pack according to claim 3, characterized in that: The coupling portion is provided with a receiving groove, the pushed member is received in the receiving groove, and a first guide protrusion protrudes from the bottom surface of the receiving groove; the first guide protrusion is not lower than the first pushed block.

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. An electric tool system, characterized in that: The system includes a first electric tool and a battery pack as described in any one of claims 3 to 8; the battery connecting part 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 part of the first electric tool; the pushing member includes a pushing block, which can push the first pushed block.

10. The electric tool system according to claim 9, wherein: The battery connecting portion of the first electric tool has a step portion; the pushing member includes a second guiding protrusion.

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