Battery packs, tool systems and charging systems

Abstract

The present invention provides a battery pack, a tool system and a charging system. The battery pack includes a shell component, a battery pack contained in the shell component and a control component electrically connected to the battery pack. The control component is rotatably arranged. When the control component is in a first state, the battery pack outputs a first voltage value; when the control component rotates to a second state, the battery pack outputs a second voltage value; when the control component rotates to a third state, the battery pack outputs a third voltage value; the first voltage value is less than the second voltage value, and the second voltage value is less than the third voltage value. Compared with the prior art, the battery pack of the present invention utilizes the rotation of the control component to realize the series-parallel state switching of each battery cell module in the battery pack, and then changes the output voltage of the battery pack, thereby improving the adaptability of the tool system having the battery pack.

Description

Technical Field

[0001] The present invention relates to the technical field of battery packs, and in particular to a battery pack, a tool system and a charging system. Background Art

[0002] In the garden machinery and power tool industries, tools with different rated voltages usually need to be powered by battery packs with different rated voltages, which results in an increase in the types of battery packs and an increase in costs.

[0003] In view of this, it is indeed necessary to design an improved battery pack, tool system and charging system to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a battery pack, a tool system and a charging system that can achieve quick switching and three voltage outputs.

[0005] To achieve the above-mentioned purpose, the present invention provides a battery pack, including a shell component, a battery pack accommodated in the shell component, and a control component electrically connected to the battery pack, the battery pack includes at least a first battery cell module, a second battery cell module, a third battery cell module and a fourth battery cell module, the control component is rotatably arranged, and when the control component is in a first state, the first battery cell module, the second battery cell module, the third battery cell module and the fourth battery cell module are connected in parallel with each other, and the battery pack outputs a first voltage value; when the control component rotates to a second state, the first battery cell module, the second battery cell module, the third battery cell module and the fourth battery cell module are connected in series and parallel, and the battery pack outputs a second voltage value; when the control component rotates to a third state, the first battery cell module, the second battery cell module, the third battery cell module and the fourth battery cell module are connected in series with each other, and the battery pack outputs a third voltage value; the first voltage value is less than the second voltage value, and the second voltage value is less than the third voltage value.

[0006] As a further improvement of the present invention, the control component includes a gear trigger, a switch component fixedly connected to the gear trigger, and a trigger component connected to the battery pack, the gear trigger is rotatably arranged, and when the gear trigger is in a first state, the switch component triggers the trigger component, and the battery pack outputs a first voltage value; when the gear trigger rotates to a second state, the switch component rotates synchronously to trigger the trigger component, and the battery pack outputs a second voltage value; when the gear trigger rotates to a third state, the switch component rotates synchronously to trigger the trigger component, and the battery pack outputs a third voltage value.

[0007] As a further improvement of the present invention, the switch assembly is coaxially arranged with the gear trigger member, the trigger assembly is arranged on the outer peripheral side of the switch assembly, a groove is provided on the switch assembly, the trigger assembly has a closed position and an open position, when the trigger assembly is in the closed position, one end of the trigger assembly protrudes into the groove, when the trigger assembly is in the open position, one end of the trigger assembly is disengaged from the groove.

[0008] As a further improvement of the present invention, the switch assembly at least includes a first switch, a second switch and a third switch arranged up and down; the trigger assembly at least includes a first trigger assembly, a second trigger assembly and a third trigger assembly, each trigger assembly includes a static contact piece, a dynamic contact piece arranged opposite to the static contact piece and a switch trigger block connected to the dynamic contact piece, the first switch, the second switch and the third switch are all provided with the groove, when the trigger assembly is in the closed position, the switch trigger block protrudes into the corresponding groove, the dynamic contact piece is electrically connected to the static contact piece, when the trigger assembly is in the disconnected position, the switch trigger block is disengaged from the corresponding groove, and the dynamic contact piece is disconnected from the static contact piece.

[0009] As a further improvement of the present invention, when the gear trigger is in the first state, the first trigger assembly and the third trigger assembly are both in the closed position, and the second trigger assembly is in the disconnected position; when the gear trigger is rotated to the third state, the second trigger assembly is in the closed position, and the first trigger assembly and the third trigger assembly are both in the disconnected position.

[0010] As a further improvement of the present invention, the control component also includes a storage box for accommodating the switch component and the trigger component. The storage box is provided with a plurality of storage chambers for respectively accommodating the switch component and the trigger component. The static contact piece is arranged to fit the inner wall of the storage chamber. Each trigger component also includes a spring limited between the dynamic contact piece and the inner wall of the storage chamber. When the trigger assembly is in a closed position, the spring continuously presses against the dynamic contact piece to keep the dynamic contact piece in contact with the static contact piece.

[0011] As a further improvement of the present invention, the accommodating cavity includes a first accommodating cavity for accommodating a switch assembly and a second accommodating cavity for accommodating a trigger assembly. The first accommodating cavity is approximately located at the center of the accommodating box. The first accommodating cavity is communicated with the second accommodating cavity. The static contact piece is arranged to fit the inner wall of the second accommodating cavity. When the trigger assembly is in the disconnected position, the switch trigger block is accommodated in the second accommodating cavity. When the trigger assembly is in the closed position, one end of the switch trigger block protrudes into the first accommodating cavity.

[0012] As a further improvement of the present invention, a limit groove is provided at the bottom of the second receiving cavity, the switch trigger block is limited in the limit groove, a clamping groove is provided at the rear of the switch trigger block, the moving contact piece is arranged perpendicular to the switch trigger block and is clamped in the clamping groove, and the spring is also accommodated in the clamping groove to push the moving contact piece and the switch trigger block to move along the limit groove from the disconnected position to the closed position when the switch assembly rotates synchronously.

[0013] As a further improvement of the present invention, the first trigger component includes a first trigger member corresponding to the first switch setting, a second trigger member corresponding to the second switch setting, and a third trigger member corresponding to the third switch setting; the second trigger component includes a fourth trigger member corresponding to the first switch setting, a fifth trigger member corresponding to the second switch setting, and a sixth trigger member corresponding to the third switch setting; the third trigger component includes a seventh trigger member corresponding to the first switch setting, an eighth trigger member corresponding to the second switch setting, and a ninth trigger member corresponding to the third switch setting.

[0014] As a further improvement of the present invention, when the gear trigger rotates to the second state, the second trigger, the fourth trigger, the sixth trigger and the eighth trigger are all in the closed position, and the first trigger, the third trigger, the fifth trigger, the seventh trigger and the ninth trigger are all in the disconnected position.

[0015] To achieve the above object, the present invention provides a tool system, comprising:

[0016] A battery pack, the battery pack comprising a housing assembly, a battery pack contained in the housing assembly, and a control assembly electrically connected to the battery pack, the battery pack comprising at least a first battery cell module, a second battery cell module, a third battery cell module, and a fourth battery cell module, the control assembly being rotatably arranged;

[0017] a first electric tool capable of operating at a first rated voltage, the first electric tool being provided with a first external coupling;

[0018] a second electric tool capable of operating at a second rated voltage, the second electric tool being provided with a second external coupling;

[0019] a third electric tool capable of operating at a third rated voltage, the third electric tool being provided with a third external coupling member;

[0020] When the battery pack is connected to a first external coupling member of a first electric tool, the control component is in a first state, and the battery pack outputs a first voltage value;

[0021] When the battery pack is connected to a second external coupling member of a second electric tool, the control assembly rotates to a second state, and the battery pack outputs a second voltage value;

[0022] When the battery pack is connected to a third external coupling component of a third electric tool, the control component rotates to a third state, and the battery pack outputs a third voltage value; the first voltage value is smaller than the second voltage value, and the second voltage value is smaller than the third voltage value.

[0023] As a further improvement of the present invention, the first voltage value is "n"V, the second voltage value is "2n"V, and the third voltage value is "4n"V.

[0024] As a further improvement of the present invention, the control component includes a gear trigger component, which is rotatably arranged. The second external coupling component and the third external coupling component are both provided with a rack trigger rod, and the rack trigger rod is arranged opposite to the gear trigger component, so that when the battery pack is connected to the second external coupling component or the third external coupling component, the rack trigger rod is meshed with the gear trigger component and drives the gear trigger component to rotate forward.

[0025] As a further improvement of the present invention, when the second external coupling component is connected to the battery pack, the gear trigger component rotates forwardly by a first angle, and when the third external coupling component is connected to the battery pack, the gear trigger component rotates forwardly by a second angle, and the first angle is smaller than the second angle.

[0026] As a further improvement of the present invention, the tool system also includes a fourth external coupling component, which is also provided with a rack trigger rod. When the battery pack is connected to the fourth external coupling component, the rack trigger rod is meshed with the gear trigger component and drives the gear trigger component to rotate in the opposite direction.

[0027] As a further improvement of the present invention, each external coupling member is provided with a positive electrode plug-in piece and a negative electrode plug-in piece, the shell assembly of the battery pack is provided with a plug-in interface, the plug-in interface is provided with a positive terminal and a negative terminal electrically connected to the battery pack, the positive electrode plug-in piece is plugged into the positive terminal, and the negative electrode plug-in piece is plugged into the negative terminal.

[0028] As a further improvement of the present invention, the control component also includes a switch component fixedly connected to the gear trigger component and a trigger component connected to the battery pack. When the battery pack is connected to the first external coupling component, the switch component triggers the trigger component, and the first battery cell module, the second battery cell module, the third battery cell module and the fourth battery cell module are connected in parallel with each other; when the battery pack is connected to the second external coupling component, the switch component rotates synchronously to trigger the trigger component, and the first battery cell module, the second battery cell module, the third battery cell module and the fourth battery cell module are connected in series and parallel; when the battery pack is connected to the third external coupling component, the switch component rotates synchronously to trigger the trigger component, and the first battery cell module, the second battery cell module, the third battery cell module and the fourth battery cell module are connected in series with each other.

[0029] As a further improvement of the present invention, when the second external coupling component is connected to the battery pack, the first battery cell module and the second battery cell module are connected in series to form a first battery string, the third battery cell module and the fourth battery cell module are connected in series to form a second battery string, and the first battery string and the second battery string are connected in parallel.

[0030] As a further improvement of the present invention, the switch assembly is coaxially arranged with the gear trigger member, the trigger assembly is arranged on the outer peripheral side of the switch assembly, a groove is provided on the switch assembly, the trigger assembly has a closed position and an open position, when the trigger assembly is in the closed position, one end of the trigger assembly protrudes into the groove, when the trigger assembly is in the open position, one end of the trigger assembly is disengaged from the groove.

[0031] As a further improvement of the present invention, the switch assembly at least includes a first switch, a second switch and a third switch arranged up and down; the trigger assembly at least includes a first trigger assembly, a second trigger assembly and a third trigger assembly, each trigger assembly includes a static contact piece, a dynamic contact piece arranged opposite to the static contact piece and a switch trigger block connected to the dynamic contact piece, the first switch, the second switch and the third switch are all provided with the groove, when the trigger assembly is in the closed position, the switch trigger block protrudes into the corresponding groove, the dynamic contact piece is electrically connected to the static contact piece, when the trigger assembly is in the disconnected position, the switch trigger block is disengaged from the corresponding groove, and the dynamic contact piece is disconnected from the static contact piece.

[0032] To achieve the above object, the present invention provides a charging system, comprising:

[0033] A battery pack, the battery pack comprising a shell assembly, a battery pack contained in the shell assembly, and a control assembly electrically connected to the battery pack, the battery pack comprising at least a first battery cell module, a second battery cell module, a third battery cell module, and a fourth battery cell module, the control assembly being rotatably arranged, and when the control assembly is in a first state, the battery pack outputs a first voltage value; when the control assembly rotates to a second state, the battery pack outputs a second voltage value; when the control assembly rotates to a third state, the battery pack outputs a third voltage value; the first voltage value is less than the second voltage value, and the second voltage value is less than the third voltage value;

[0034] A charger is used to charge the battery pack. When the charger is docked with the battery pack for charging, the control component is in a first state, and the first battery cell module, the second battery cell module, the third battery cell module and the fourth battery cell module are connected in parallel.

[0035] The beneficial effect of the present invention is that the battery pack of the present invention utilizes the rotation of the gear trigger to change the closed or open state of the switch component, so that the corresponding trigger component is triggered, thereby realizing the series-parallel state switching of each battery cell module in the battery pack, and then changing the output voltage of the battery pack, thereby improving the adaptability of the tool system with the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a three-dimensional diagram of the tool system of the present invention.

[0037] Figure 2 yes Figure 1 Exploded view of tool system shown.

[0038] Figure 3 yes Figure 2 Exploded view of the center housing assembly.

[0039] Figure 4 yes Figure 2 Schematic diagram of the three-dimensional structure of the control component.

[0040] Figure 5 yes Figure 4 Partial exploded view of the control assembly shown.

[0041] Figure 6 yes Figure 5 Exploded cross-section view of the switch assembly.

[0042] Figure 7 yes Figure 5 Exploded view of a single trigger component.

[0043] Figure 8 yes Figure 5 Schematic diagram of the structure of the medium storage box.

[0044] Fig. 9 yes Figure 2 A stereoscopic view of the first external coupling member.

[0045] Fig.10 yes Fig. 9 The schematic diagram shows the structure of the switch assembly cooperating with the corresponding trigger assembly after the first external coupling member is inserted.

[0046] Fig.11 yes Fig. 9 The connection circuit diagram inside the battery pack is shown after the first external coupling member is inserted.

[0047] Fig.12 is a perspective view of a second external coupling member.

[0048] Fig.13 yes Fig.12 The connection circuit diagram inside the battery pack is shown after the second external coupling member is inserted.

[0049] Fig.14 is a perspective view of a third external coupling member.

[0050] Fig.15 yes Fig.14 The connection circuit diagram inside the battery pack is shown after the third external coupling component is inserted.

[0051] Fig.16 is a perspective view of a fourth external coupling member.

[0052] Fig.17 yes Fig.16 The connection circuit diagram inside the battery pack is shown after the fourth external coupling member is inserted. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0054] like Figure 1 and Figure 2 As shown, the present invention discloses a battery pack, including a housing assembly 10, a battery pack 20 contained in the housing assembly 10, a PCB board 30, and a control assembly 40 electrically connected to the battery pack 20. The battery pack 20 includes a plurality of battery modules, and the control assembly 40 is electrically connected to each battery module. The battery pack of the present invention is used in a tool system, and the tool system also includes an external coupling member 50 that can be inserted into the battery pack to dock with the battery pack.

[0055] like Figure 2 and Figure 3As shown, the housing assembly 10 includes an upper housing 11 and a lower housing 12, and the battery pack 20, the PCB board 30 and the control assembly 40 are all accommodated in a receiving space 13 surrounded by the upper housing 11 and the lower housing 12. Two docking grooves 14 are provided on the top of the upper housing 11, and two plug ports 15 are provided on the side wall of the upper housing 11. The plug ports 15 are provided with a positive terminal 16 and a negative terminal 17 electrically connected to the battery pack 20. The positive terminal 16 is connected to the positive electrode of the battery pack 20 to be docked with the external coupling member 50 as a total positive output terminal, and the negative terminal 17 is connected to the negative electrode of the battery pack 20 to be docked with the external coupling member 50 as a total negative output terminal, so as to realize the output of the voltage in the battery pack.

[0056] The battery pack 20 includes at least a first battery cell module A, a second battery cell module B, a third battery cell module C and a fourth battery cell module D, and the positive and negative electrodes of the first battery cell module A, the positive and negative electrodes of the second battery cell module B, the positive and negative electrodes of the third battery cell module C, and the positive and negative electrodes of the fourth battery cell module D are all connected to the control component 40 through a conductive sheet 21, so that the control component 40 can be used to control the connection method between the battery cell modules and change the output voltage of the battery pack.

[0057] The first battery module A, the second battery module B, the third battery module C and the fourth battery module D are all formed by connecting a number of battery cells in series and / or in parallel. The four battery modules have equal rated output voltages. Assuming that the rated output voltage of each battery module is "n" V, the rated output voltage u1 of the first battery module A = the rated output voltage u2 of the second battery module B = the rated output voltage u3 of the third battery module C = the rated output voltage u4 of the fourth battery module D = "n" V. The PCB board 30 is located below the control component 40 and above the battery pack 20, and is used to connect the control component 40 and the battery pack 20. The positive terminal 16 and the negative terminal 17 are welded and fixed on the PCB board 30.

[0058] like Figures 4 to 8As shown, the control assembly 40 includes a gear trigger 41 , a switch assembly 42 fixedly connected to the gear trigger 41 , and a trigger assembly 43 connected to the battery pack 20 . The gear trigger 41 is arranged to rotate, and when the gear trigger 41 is in the first state, the switch component 42 triggers the corresponding trigger component 43, the first battery cell module A, the second battery cell module B, the third battery cell module C and the fourth battery cell module D are connected in parallel, and the battery pack outputs a first voltage value; when the gear trigger 41 rotates to the second state, the switch component 42 rotates synchronously and triggers the corresponding trigger component 43, the first battery cell module A, the second battery cell module B, the third battery cell module C and the fourth battery cell module D are connected in series and parallel (i.e., first connected in series and then in parallel or first connected in parallel and then in series), and the battery pack outputs a second voltage value; when the gear trigger 41 rotates to the third state, the switch component 42 rotates synchronously and triggers the corresponding trigger component 43, the first battery cell module A, the second battery cell module B, the third battery cell module C and the fourth battery cell module D are connected in series, and the battery pack outputs a third voltage value; the first voltage value is less than the second voltage value, and the second voltage value is less than the third voltage value.

[0059] The gear trigger 41 is provided with a rack 411, and the switch assembly 42 is coaxially arranged with the gear trigger 41 through its own fixed shaft 422, so that when the gear trigger 41 rotates, the switch assembly 42 can be synchronously driven to rotate. The trigger assembly 43 is arranged on the outer peripheral side of the switch assembly 42, and a groove 421 is opened on the switch assembly 42. The trigger assembly 43 has a closed position and an open position. When the trigger assembly 43 is in the closed position, one end of the trigger assembly 43 protrudes into the groove 421, and when the trigger assembly 43 is in the open position, one end of the trigger assembly 43 is separated from the groove 421.

[0060] Specifically, the switch assembly 42 at least includes a first switch X, a second switch Y and a third switch Z arranged vertically, the first switch X, the second switch Y and the third switch Z are all provided with the groove 421, and the first switch X and the third switch Z are both provided with three grooves 421, and the opening positions of the three grooves 421 are correspondingly the same, the second switch Y is provided with four grooves 421, and the four grooves 421 are divided into two groups and symmetrically arranged on both sides of the second switch Y. The trigger assembly 43 at least includes a first trigger assembly 431, a second trigger assembly 432 and a third trigger assembly 433. The first trigger assembly 431 includes a first trigger member 4311 corresponding to the first switch X, a second trigger member 4312 corresponding to the second switch Y and a third trigger member 4313 corresponding to the third switch Z; the second trigger assembly 432 includes a fourth trigger member 4321 corresponding to the first switch X, a fifth trigger member 4322 corresponding to the second switch Y and a sixth trigger member 4323 corresponding to the third switch Z; the third trigger assembly 433 includes a seventh trigger member 4331 corresponding to the first switch X, an eighth trigger member 4332 corresponding to the second switch Y and a ninth trigger member 4333 corresponding to the third switch Z.

[0061] When the gear trigger 41 is in the first state, the first trigger component 431 and the third trigger component 433 are both in the closed position, the second trigger component 432 is in the open position, the first battery module A, the second battery module B, the third battery module C and the fourth battery module D are connected in parallel, and the first voltage value output by the battery pack is "n" V; when the gear trigger 41 rotates to the second state, the second trigger component 4312, the fourth trigger component 4321, the sixth trigger component 4323 and the eighth trigger component 4332 are all in the closed position, the first trigger component 4311, the third trigger component 4313, the fifth trigger component 4322, the seventh trigger component 4331 and the ninth trigger component 4333 are In the disconnected position, the first battery module A and the second battery module B are connected in series to form a first battery string, and the third battery module C and the fourth battery module D are connected in series to form a second battery string. Then, the first battery string and the second battery string are connected in parallel (i.e., a "series first, then parallel" connection method). At this time, the second voltage value output by the battery pack is "2n" V; when the gear trigger 41 rotates to the third state, the second trigger component 432 is in the closed position, the first trigger component 431 and the third trigger component 433 are both in the disconnected position, the first battery module A, the second battery module B, the third battery module C and the fourth battery module D are connected in series with each other, and the third voltage value output by the battery pack is "4n" V.

[0062] Of course, when the gear trigger 41 rotates to the second state, the first battery module A, the second battery module B, the third battery module C and the fourth battery module D can also be designed as a "parallel first and then series" connection method according to actual conditions. At this time, the battery pack can also output the second voltage value "2n" V.

[0063] Each trigger member includes a static contact piece 44, a dynamic contact piece 45 arranged opposite to the static contact piece 44, and a switch trigger block 46 connected to the dynamic contact piece 45. When the trigger member is in the closed position, the switch trigger block 46 protrudes into the corresponding groove 421, and the dynamic contact piece 45 is electrically connected to the static contact piece 44; when the trigger member is in the disconnected position, the switch trigger block 46 is disengaged from the corresponding groove 421, and the dynamic contact piece 45 is disconnected from the static contact piece 44.

[0064] The control assembly 40 also includes a storage box 401 for accommodating the switch assembly 42 and the trigger assembly 43. The storage box 401 is provided with a plurality of accommodating chambers for accommodating the switch assembly 42 and the trigger assembly 43 respectively. The static contact piece 44 is arranged to fit the inner side wall of the accommodating chamber. Each trigger member also includes a spring 47 limited between the dynamic contact piece 45 and the inner side wall of the accommodating chamber. When the trigger member is in the closed position, the spring 47 continuously presses against the dynamic contact piece 45, so that the dynamic contact piece 45 maintains contact with the static contact piece 44. Such a design reduces the influence of vibration on the contact stability of the dynamic contact piece 45 and the static contact piece 44.

[0065] The receiving chamber includes a first receiving chamber 402 for receiving the switch assembly 42 and a second receiving chamber 403 for receiving the trigger assembly 43. The first receiving chamber 402 is approximately located at the center of the receiving box 401. The second receiving chamber 403 is provided with three and is combined with the first receiving chamber 402 to form a T shape. The first receiving chamber 402 is connected to the second receiving chamber 403. The static contact piece 44 is arranged to fit the inner wall of the second receiving chamber 403. When the trigger is in the disconnected position, the switch trigger block 46 is completely received in the second receiving chamber 403. When the trigger is in the closed position, the protrusion 461 at one end of the switch trigger block 46 protrudes into the first receiving chamber 402 and matches with the groove 421 at the corresponding position.

[0066] A first limiting groove 404 is provided at the bottom of the second receiving cavity 403, and the switch trigger block 46 is limited and received in the first limiting groove 404; a second limiting groove 405 is provided on the rear side wall of the second receiving cavity 403, and one end of the spring 47 is limited in the second limiting groove 405. A clamping groove 462 is provided at the rear of the switch trigger block 46, and the movable contact piece 45 is arranged perpendicular to the switch trigger block 46 and clamped in the clamping groove 462, and the spring 47 is also received in the clamping groove 462, so as to push the movable contact piece 45 and the switch trigger block 46 to move from the open position to the closed position along the first limiting groove 404 when the switch assembly 42 rotates synchronously.

[0067] In this embodiment, dynamic contact points 451 are provided at both ends of the dynamic contact piece 45, and two static contact pieces 44 are correspondingly provided in each second receiving cavity 403, and each static contact piece 44 is provided with a static contact point 441, so that the two dynamic contact points 451 can be connected or disconnected with the corresponding two static contact points 441 to realize the closing or disconnection of the trigger member.

[0068] The working principle of the control component 40 can be briefly described as follows: the groove 421 on the switch component 42 can be used to accommodate the protrusion 461 of the switch trigger block 46. When the groove 421 moves to the switch trigger block 46 area, the spring 47 at the rear of the movable contact piece 45 automatically pushes the movable contact piece 45 and the switch trigger block 46, so that the protrusion 461 of the switch trigger block 46 is pushed out from the second accommodating cavity 403 to the first accommodating cavity 402, and the movable contact piece 45 is pushed from the disconnected position to the closed position to achieve docking with the static contact piece 44; and the non-groove part of the switch component 42 can also push the switch trigger block 46 to move, so that the protrusion 461 retracts to the second accommodating cavity 403. During the movement, the switch trigger block 46 needs to overcome the thrust of the spring 47 at the rear of the movable contact piece 45, and push the movable contact piece 45 from the closed position to the disconnected position to achieve the disconnection of the movable contact piece 45 and the static contact piece 44.

[0069] The external coupling component 50 includes a first external coupling component 51, a second external coupling component 52 and a third external coupling component 53. For the convenience of description, the tool system is defined to include a first electric tool, a second electric tool and a third electric tool. The first electric tool can operate at a first rated voltage, and the first external coupling component 51 is arranged on the first electric tool; the second electric tool can operate at a second rated voltage, and the second external coupling component 52 is arranged on the second electric tool; the third electric tool can operate at a third rated voltage, and the third external coupling component 53 is arranged on the third electric tool. The following will take these three external coupling components as an example to explain in detail the voltage switching principle of the battery pack of the present invention. It is defined that each battery module is composed of 5 battery cells connected in series, and the voltage of each battery module is 20V.

[0070] like Fig. 9 As shown, the first external coupling component 51 includes a main body 511 and a positive electrode plug-in piece 512 and a negative electrode plug-in piece 513 integrally formed with the main body 511. After the first external coupling component 51 is inserted, the positive electrode plug-in piece 512 is plugged into the positive terminal 16, and the negative electrode plug-in piece 513 is plugged into the negative terminal 17, thereby realizing electrical and mechanical connection between the battery pack and the first external coupling component 51, and realizing the transmission of current and voltage.

[0071] like Fig.10 and Fig.11 As shown, after the first external coupling member 51 is inserted into the plug interface 15, the positive plug-in piece 512 is plugged into the positive terminal 16, and the negative plug-in piece 513 is plugged into the negative terminal 17, and the gear trigger member 41 does not rotate. At this time, the gear trigger member 41 is in the first state (i.e., the initial state), the first trigger member 4311 (i.e., switch X1), the second trigger member 4312 (i.e., switch Y1), the third trigger member 4313 (i.e., switch Z1), the seventh trigger member 4331 (i.e., switch X3), the eighth trigger member 4332 (i.e., switch Y3) and the ninth trigger member 4333 (i.e., switch Z3) are all in the closed position, the fourth trigger member 4321 (i.e., switch X2), the fifth trigger member 4322 (i.e., switch Y2) and the sixth trigger member 4323 (i.e., switch Z2) are in the open position, and the first battery module A, the second battery module B, the third battery module C and the fourth battery module D are connected in parallel with each other. According to the principle of "parallel voltage division and series current division", the first voltage value output by the battery pack at this time is equal to the rated output voltage of each battery cell module, that is, U=u1=u2=u3=u4=20V.

[0072] like Fig.12 As shown, the second external coupling component 52 includes a main body 521 and a positive electrode plug-in piece 522 and a negative electrode plug-in piece 523 integrally formed with the main body 521. After the second external coupling component 52 is inserted, the positive electrode plug-in piece 522 is plugged into the positive terminal 16, and the negative electrode plug-in piece 523 is plugged into the negative terminal 17, thereby realizing electrical and mechanical connection between the battery pack and the second external coupling component 52, and realizing the transmission of current and voltage.

[0073] and Fig. 9 The difference between the first external coupling member 51 shown is that a rack trigger rod 524 is provided on the main body 521 of the second external coupling member 52, and the rack trigger rod 524 is arranged opposite to the gear trigger member 41, so that when the second external coupling member 52 is inserted, the rack trigger rod 524 meshes with the gear trigger member 41 and drives the gear trigger member 41 to rotate in the positive direction.

[0074] like Fig.13 Combined with Figure 5 and Fig.10 As shown in the figure, when the second external coupling member 52 is inserted, the rack trigger rod 524 enters from the docking groove 14 and meshes with the gear trigger member 41, horizontally pushing the body 521 of the second external coupling member 52 until the positive electrode plug-in piece 522 is plugged into the positive terminal 16 and the negative electrode plug-in piece 523 is plugged into the negative terminal 17. At this time, the gear trigger member 41 is driven by the rack trigger rod 524 to rotate to the second state, and the second trigger member 4312 (i.e., switch Y1), the fourth trigger member 4321 (i.e., switch X2), and the sixth trigger member 4323 (i.e., switch X4) are turned on and off. The first trigger 4311 (i.e. switch X1), the third trigger 4313 (i.e. switch Z1), the fifth trigger 4322 (i.e. switch Y2), the seventh trigger 4331 (i.e. switch X3) and the ninth trigger 4333 (i.e. switch Z3) are all in the open position, forming a connection mode in which the first battery module A is connected in series with the second battery module B, the third battery module C is connected in series with the fourth battery module D, and then connected in parallel with each other (i.e. first in series and then in parallel). According to the principle of "parallel voltage division and series current division", the second voltage value output by the battery pack at this time is equal to the sum of the rated output voltages of the two battery modules, that is, U=u1+u2=u3+u4=40V.

[0075] like Fig.14 As shown, the third external coupling component 53 includes a main body 531 and a positive electrode plug-in piece 532 and a negative electrode plug-in piece 533 integrally formed with the main body 531. After the third external coupling component 53 is inserted, the positive electrode plug-in piece 532 is plugged into the positive terminal 16, and the negative electrode plug-in piece 533 is plugged into the negative terminal 17, thereby realizing the electrical and mechanical connection between the battery pack and the third external coupling component 53, and realizing the transmission of current and voltage.

[0076] and Fig.12 The second external coupling member 52 shown is different in that: a rack trigger rod 534 is also provided on the third external coupling member 53 to drive the gear trigger member 41 to rotate in the positive direction; however, the distance between the rack trigger rod 534 and the plug interface 15 (or the positive and negative plug-in plates 532, 533) is greater than the distance between the rack trigger rod 524 and the plug interface 15 (or the positive and negative plug-in plates 522, 523), so that the rotation stroke of the gear trigger member 41 driven by the rack trigger rod 534 is greater than the rotation stroke of the gear trigger member 41 driven by the rack trigger rod 524.

[0077] like Fig.15 Combined with Figure 5 and Fig.10As shown, when the third external coupling member 53 is inserted, the rack trigger rod 534 enters from the docking groove 14 and meshes with the gear trigger member 41, horizontally pushing the body 531 of the third external coupling member 53 until the positive electrode plug-in piece 532 is plugged into the positive terminal 16 and the negative electrode plug-in piece 533 is plugged into the negative terminal 17. At this time, the gear trigger member 41 is driven by the rack trigger rod 534 to rotate to the third state, and the first trigger member 4311 (i.e., switch X1) and the second trigger member 4312 (i.e., switch Y1) are turned on and off. , the third trigger 4313 (i.e. switch Z1), the seventh trigger 4331 (i.e. switch X3), the eighth trigger 4332 (i.e. switch Y3) and the ninth trigger 4333 (i.e. switch Z3) are all in the open position, the fourth trigger 4321 (i.e. switch X2), the fifth trigger 4322 (i.e. switch Y2) and the sixth trigger 4323 (i.e. switch Z2) are in the closed position, and the first battery module A, the second battery module B, the third battery module C and the fourth battery module D are connected in series. According to the principle of "parallel voltage division and series current division", the third voltage value output by the battery pack is equal to the sum of the rated output voltages of the four battery modules, that is, U = u1 + u2 + u3 + u4 = 80V.

[0078] It should be noted that: after the second external coupling member 52 is inserted, the gear trigger member 41 will rotate to a first angle driven by the rack trigger rod 524 until the gear trigger member 41 is in the second state; after the third external coupling member 53 is inserted, the gear trigger member 41 will rotate to a second angle driven by the rack trigger rod 534 until the gear trigger member 41 is in the third state, and the first angle is smaller than the second angle. Preferably, the first angle is 45° and the second angle is 90°, but this should not be limited to this, and can also be adjusted to other angles according to actual conditions.

[0079] According to the above description, it can be seen that: after selecting different external coupling members 50, different voltage outputs of the battery pack can be achieved to meet the voltage requirements of three different power tools, and the switching between the three voltages is fast and convenient. Of course, after the power transmission is completed, the first external coupling member 51 or the second external coupling member 52 or the third external coupling member 53 can be directly unplugged. At this time, the gear trigger member 41 will rotate in the opposite direction under the drive of the rack trigger rod 524 or the rack trigger rod 534 until it reaches the first state, that is, the initial state, so as to be ready for the next plug-in.

[0080] like Fig.16As shown, the battery pack also has a transportation mode, which is realized by means of a fourth external coupling component 54. The fourth external coupling component 54 also includes a main body 541 and a positive electrode plug-in piece 542 and a negative electrode plug-in piece 543 integrally formed with the main body 541. After the fourth external coupling component 54 is inserted, the positive electrode plug-in piece 542 is plugged into the positive terminal 16, and the negative electrode plug-in piece 543 is plugged into the negative terminal 17, thereby realizing the electrical and mechanical connection between the battery pack and the fourth external coupling component 54.

[0081] and Fig.14 The third external coupling member 53 shown is different in that: a rack trigger rod 544 is also provided on the fourth external coupling member 54, but the position of the rack trigger rod 544 is opposite to that of the rack trigger rod 534. In other words, relative to the same main body, the rack trigger rod 544 is located on the right half of the main body and the rack on the rack trigger rod 544 faces the left direction, while the rack trigger rod 534 is located on the left half of the main body and the rack on the rack trigger rod 534 faces the right direction, so that the rack trigger rod 534 can drive the gear trigger member 41 to rotate forward, while the rack trigger rod 544 drives the gear trigger member 41 to rotate reversely.

[0082] like Fig.17 Combined with Figure 5 and Fig.10 As shown, when the fourth external coupling member 54 is inserted, the rack trigger rod 544 enters from another docking groove 14 on the top of the upper shell 11 and meshes with the gear trigger member 41, horizontally pushing the body 541 of the fourth external coupling member 54 until the positive electrode plug-in piece 542 is plugged into the positive terminal 16 and the negative electrode plug-in piece 543 is plugged into the negative terminal 17. At this time, the gear trigger member 41 rotates in the opposite direction to the fourth state under the drive of the rack trigger rod 544, and the first trigger member 4311 (i.e., switch X1) and the second trigger member 4312 (i.e., switch X2) are turned on and off. Y1), the third trigger component 4313 (i.e. switch Z1), the fourth trigger component 4321 (i.e. switch X2), the fifth trigger component 4322 (i.e. switch Y2), the sixth trigger component 4323 (i.e. switch Z2), the seventh trigger component 4331 (i.e. switch X3), the eighth trigger component 4332 (i.e. switch Y3) and the ninth trigger component 4333 (i.e. switch Z3) are all in the disconnected position, the first battery module A, the second battery module B, the third battery module C and the fourth battery module D are all disconnected, and the battery pack has no voltage output.

[0083] Since the entire battery pack has no voltage output when the fourth external coupling member 54 is inserted, the battery pack can be transported over long distances or operated without power in a protected state, thereby protecting the battery pack and the operator. In this state, the reverse rotation angle of the gear trigger member 41 is preferably 22.5°, but should not be limited thereto.

[0084] The battery pack of the present invention can also be applied to a charging system (not shown), which includes the aforementioned battery pack and a charger for charging the battery pack. When the charger is docked with the battery pack for charging, the gear trigger 41 is in the first state. At this time, the first battery module A, the second battery module B, the third battery module C and the fourth battery module D are connected in parallel with each other, and the charging voltage output by the charger is equal to the rated output voltage of a single battery module, which is a low voltage, protecting the battery pack from the impact of high current and high voltage.

[0085] To summarize, the battery pack of the present invention changes the closed or open state of the switch component 42 by rotating the gear trigger 41 to different positions (or different states), so that the corresponding trigger component 43 is triggered, thereby realizing the series and parallel state switching of each battery module in the battery pack, and then changing the output voltage of the battery pack (at least three voltages can be output), thereby improving the adaptability of the tool system with the battery pack.

[0086] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A battery pack, comprising a housing assembly, a battery pack contained in the housing assembly, and a control assembly electrically connected to the battery pack, wherein the battery pack comprises at least a first battery cell module, a second battery cell module, a third battery cell module, and a fourth battery cell module, characterized in that: The control component is rotatably arranged, and when the control component is in a first state, the first battery cell module, the second battery cell module, the third battery cell module and the fourth battery cell module are connected in parallel with each other, and the battery pack outputs a first voltage value; When the control component rotates to the second state, the first battery cell module, the second battery cell module, the third battery cell module and the fourth battery cell module are connected in series and parallel, and the battery pack outputs a second voltage value; when the control component rotates to the third state, the first battery cell module, the second battery cell module, the third battery cell module and the fourth battery cell module are connected in series, and the battery pack outputs a third voltage value; The first voltage value is less than the second voltage value, and the second voltage value is less than the third voltage value; The control component includes a gear trigger, a switch component fixedly connected to the gear trigger, and a trigger component connected to the battery pack. The gear trigger is rotatably arranged, the switch component is coaxially arranged with the gear trigger, the trigger component is arranged on the outer peripheral side of the switch component, a groove is provided on the switch component, and the trigger component has a closed position and an open position. When the trigger component is in the closed position, one end of the trigger component protrudes into the groove, and when the trigger component is in the open position, one end of the trigger component is separated from the groove; the switch component at least includes a first switch, a second switch and a third switch arranged up and down; the trigger component at least includes a first trigger component, a second trigger component and a third trigger component.

2. The battery pack according to claim 1, characterized in that: When the gear trigger is in a first state, the switch assembly triggers the trigger assembly, and the battery pack outputs a first voltage value; when the gear trigger rotates to a second state, the switch assembly rotates synchronously to trigger the trigger assembly, and the battery pack outputs a second voltage value; When the gear trigger member rotates to the third state, the switch assembly rotates synchronously to trigger the trigger assembly, and the battery pack outputs a third voltage value.

3. The battery pack according to claim 1, characterized in that: Each trigger assembly includes a static contact piece, a dynamic contact piece arranged opposite to the static contact piece, and a switch trigger block connected to the dynamic contact piece. The first switch, the second switch and the third switch are all provided with the groove. When the trigger assembly is in the closed position, the switch trigger block protrudes into the corresponding groove, and the dynamic contact piece is electrically connected to the static contact piece. When the trigger assembly is in the disconnected position, the switch trigger block is disengaged from the corresponding groove, and the dynamic contact piece is disconnected from the static contact piece.

4. The battery pack according to claim 1, characterized in that: When the gear trigger is in the first state, the first trigger assembly and the third trigger assembly are both in the closed position, and the second trigger assembly is in the disconnected position; when the gear trigger rotates to the third state, the second trigger assembly is in the closed position, and the first trigger assembly and the third trigger assembly are both in the disconnected position.

5. The battery pack according to claim 3, characterized in that: The control assembly also includes a storage box for accommodating the switch assembly and the trigger assembly. The storage box is provided with a plurality of storage chambers for accommodating the switch assembly and the trigger assembly respectively. The static contact piece is arranged in contact with the inner wall of the storage chamber. Each trigger assembly also includes a spring limited between the dynamic contact piece and the inner wall of the storage chamber. When the trigger assembly is in a closed position, the spring continuously presses against the dynamic contact piece to keep the dynamic contact piece in contact with the static contact piece.

6. The battery pack according to claim 5, characterized in that: The receiving chamber includes a first receiving chamber for receiving a switch assembly and a second receiving chamber for receiving a trigger assembly. The first receiving chamber is approximately located at the center of the receiving box. The first receiving chamber is communicated with the second receiving chamber. The static contact piece is arranged to fit the inner wall of the second receiving chamber. When the trigger assembly is in the disconnected position, the switch trigger block is received in the second receiving chamber. When the trigger assembly is in the closed position, one end of the switch trigger block protrudes into the first receiving chamber.

7. The battery pack according to claim 6, characterized in that: A limiting groove is provided at the bottom of the second receiving cavity, the switch trigger block is limited in the limiting groove, a clamping groove is provided at the rear of the switch trigger block, the moving contact piece is arranged perpendicular to the switch trigger block and clamped in the clamping groove, and the spring is also accommodated in the clamping groove to push the moving contact piece and the switch trigger block to move along the limiting groove from the disconnected position to the closed position when the switch assembly rotates synchronously.

8. The battery pack according to claim 1, characterized in that: The first trigger component includes a first trigger member corresponding to the first switch setting, a second trigger member corresponding to the second switch setting, and a third trigger member corresponding to the third switch setting; the second trigger component includes a fourth trigger member corresponding to the first switch setting, a fifth trigger member corresponding to the second switch setting, and a sixth trigger member corresponding to the third switch setting; the third trigger component includes a seventh trigger member corresponding to the first switch setting, an eighth trigger member corresponding to the second switch setting, and a ninth trigger member corresponding to the third switch setting.

9. The battery pack according to claim 8, characterized in that: When the gear trigger rotates to the second state, the second trigger, the fourth trigger, the sixth trigger and the eighth trigger are all in the closed position, and the first trigger, the third trigger, the fifth trigger, the seventh trigger and the ninth trigger are all in the open position.

10. A tool system, characterized in that: include: A battery pack, the battery pack comprising a housing assembly, a battery pack contained in the housing assembly, and a control assembly electrically connected to the battery pack, the battery pack comprising at least a first battery cell module, a second battery cell module, a third battery cell module, and a fourth battery cell module, the control assembly being rotatably arranged; a first electric tool capable of operating at a first rated voltage, the first electric tool being provided with a first external coupling; a second electric tool capable of operating at a second rated voltage, the second electric tool being provided with a second external coupling; a third electric tool capable of operating at a third rated voltage, the third electric tool being provided with a third external coupling member; When the battery pack is connected to a first external coupling member of a first electric tool, the control component is in a first state, and the battery pack outputs a first voltage value; When the battery pack is connected to a second external coupling member of a second electric tool, the control assembly rotates to a second state, and the battery pack outputs a second voltage value; When the battery pack is connected to a third external coupling member of a third electric tool, the control assembly rotates to a third state, and the battery pack outputs a third voltage value; The first voltage value is less than the second voltage value, and the second voltage value is less than the third voltage value; The control component includes a gear trigger, a switch component fixedly connected to the gear trigger, and a trigger component connected to the battery pack. The gear trigger is rotatably arranged, the switch component is coaxially arranged with the gear trigger, the trigger component is arranged on the outer peripheral side of the switch component, a groove is provided on the switch component, and the trigger component has a closed position and an open position. When the trigger component is in the closed position, one end of the trigger component protrudes into the groove, and when the trigger component is in the open position, one end of the trigger component is separated from the groove; the switch component at least includes a first switch, a second switch and a third switch arranged up and down; the trigger component at least includes a first trigger component, a second trigger component and a third trigger component.

11. The tool system according to claim 10, characterized in that: The first voltage value is "n"V, the second voltage value is "2n"V, and the third voltage value is "4n"V.

12. The tool system according to claim 10, characterized in that: A rack trigger rod is provided on the second external coupling member and the third external coupling member, and the rack trigger rod is arranged opposite to the gear trigger member, so that when the battery pack is connected to the second external coupling member or the third external coupling member, the rack trigger rod is meshed with the gear trigger member and drives the gear trigger member to rotate in the forward direction.

13. The tool system according to claim 10, characterized in that: When the second external coupling component is connected to the battery pack, the gear trigger component rotates forwardly by a first angle, and when the third external coupling component is connected to the battery pack, the gear trigger component rotates forwardly by a second angle, and the first angle is smaller than the second angle.

14. The tool system according to claim 10, characterized in that: The tool system also includes a fourth external coupling member, which is also provided with a rack trigger rod. When the battery pack is connected to the fourth external coupling member, the rack trigger rod meshes with the gear trigger member and drives the gear trigger member to rotate in the opposite direction.

15. The tool system according to claim 10, characterized in that: Each external coupling member is provided with a positive plug-in piece and a negative plug-in piece. The shell assembly of the battery pack is provided with a plug-in interface. The plug-in interface is provided with a positive terminal and a negative terminal electrically connected to the battery pack. The positive plug-in piece is plugged into the positive terminal, and the negative plug-in piece is plugged into the negative terminal.

16. The tool system according to claim 10, characterized in that: When the battery pack is connected to the first external coupling component, the switch component triggers the trigger component, and the first battery cell module, the second battery cell module, the third battery cell module and the fourth battery cell module are connected in parallel; when the battery pack is connected to the second external coupling component, the switch component rotates synchronously to trigger the trigger component, and the first battery cell module, the second battery cell module, the third battery cell module and the fourth battery cell module are connected in series and parallel; when the battery pack is connected to the third external coupling component, the switch component rotates synchronously to trigger the trigger component, and the first battery cell module, the second battery cell module, the third battery cell module and the fourth battery cell module are connected in series.

17. The tool system according to claim 16, characterized in that: When the second external coupling component is connected to the battery pack, the first battery cell module and the second battery cell module are connected in series to form a first battery string, the third battery cell module and the fourth battery cell module are connected in series to form a second battery string, and the first battery string and the second battery string are connected in parallel.

18. The tool system according to claim 10, characterized in that: Each trigger assembly includes a static contact piece, a dynamic contact piece arranged opposite to the static contact piece, and a switch trigger block connected to the dynamic contact piece. The first switch, the second switch and the third switch are all provided with the groove. When the trigger assembly is in the closed position, the switch trigger block protrudes into the corresponding groove, and the dynamic contact piece is electrically connected to the static contact piece. When the trigger assembly is in the disconnected position, the switch trigger block is disengaged from the corresponding groove, and the dynamic contact piece is disconnected from the static contact piece.

19. A charging system, characterized in that: include: A battery pack, the battery pack comprising a shell assembly, a battery pack contained in the shell assembly, and a control assembly electrically connected to the battery pack, the battery pack comprising at least a first battery cell module, a second battery cell module, a third battery cell module, and a fourth battery cell module, the control assembly being rotatably arranged, and when the control assembly is in a first state, the battery pack outputs a first voltage value; when the control assembly is rotated to a second state, the battery pack outputs a second voltage value; when the control assembly is rotated to a third state, the battery pack outputs a third voltage value; The first voltage value is less than the second voltage value, and the second voltage value is less than the third voltage value; A charger, used to charge the battery pack. When the charger is docked with the battery pack for charging, the control component is in a first state, and the first battery cell module, the second battery cell module, the third battery cell module and the fourth battery cell module are connected in parallel. The control component includes a gear trigger, a switch component fixedly connected to the gear trigger, and a trigger component connected to the battery pack. The gear trigger is rotatably arranged, the switch component is coaxially arranged with the gear trigger, the trigger component is arranged on the outer peripheral side of the switch component, a groove is provided on the switch component, and the trigger component has a closed position and an open position. When the trigger component is in the closed position, one end of the trigger component protrudes into the groove, and when the trigger component is in the open position, one end of the trigger component is separated from the groove; the switch component at least includes a first switch, a second switch and a third switch arranged up and down; the trigger component at least includes a first trigger component, a second trigger component and a third trigger component.

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