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 and has at least three target areas. When the control component rotates to the first target area, the battery pack outputs a first voltage value; when the control component rotates to the second target area, the battery pack outputs a second voltage value; when the control component rotates to the third target area, 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 dock with connectors in different target areas, realizes the switching of the series and parallel states of each battery 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 has at least three target areas, when the control component rotates to the first target area, 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 target area, 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 target area, 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 fixed component and a rotating component rotatable relative to the fixed component, the fixed component is formed with a connector electrically connected to the battery pack, the connector includes a first connector located in a first target area, a second connector located in a second target area, and a third connector located in a third target area, a trigger component is formed on the rotating component, when the rotating component rotates to the first target area, the trigger component is electrically connected to the first connector; when the rotating component rotates to the second target area, the trigger component is electrically connected to the second connector; when the rotating component rotates to the third target area, the trigger component is electrically connected to the third connector.

[0007] As a further improvement of the present invention, the rotating component includes a rotating body and a rotating part formed on the rotating body, the trigger part is embedded in the rotating body and exposed on the surface of the rotating body facing the fixed component, and the rotating part protrudes outward from the surface of the rotating body facing away from the fixed component, so that when the rotating part is pulled, the rotating body and the trigger part are driven to rotate synchronously.

[0008] As a further improvement of the present invention, a protrusion is provided on the circumferential outer edge of the rotating body, and a corresponding receiving groove is provided on the inner side wall of the shell assembly, and at least three receiving grooves are provided to correspond to three target areas respectively, so that when the rotating assembly rotates and switches between the first target area, the second target area and the third target area, the protrusion is limited and received in the receiving groove of the corresponding target area.

[0009] As a further improvement of the present invention, the first connecting member, the second connecting member and the third connecting member each include a first positive protrusion connected to the positive electrode of the first battery cell module, a first negative protrusion connected to the negative electrode of the first battery cell module, a second positive protrusion connected to the positive electrode of the second battery cell module, a second negative protrusion connected to the negative electrode of the second battery cell module, a third positive protrusion connected to the positive electrode of the third battery cell module, a third negative protrusion connected to the negative electrode of the third battery cell module, a fourth positive protrusion connected to the positive electrode of the fourth battery cell module, and a fourth negative protrusion connected to the negative electrode of the fourth battery cell module.

[0010] As a further improvement of the present invention, in the first target area, the first positive boss, the second positive boss, the third positive boss and the fourth positive boss are arranged in a first column, and the first negative boss, the second negative boss, the third negative boss and the fourth negative boss are arranged in a second column, and the first column and the second column are parallel to each other and spaced apart. When the rotating component rotates to the first target area, the trigger member is electrically contacted with the first column and the second column respectively, so that the positive bosses in the first column are connected to each other and the negative bosses in the second column are connected to each other. At this time, 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 to each other.

[0011] As a further improvement of the present invention, in the second target area, the third negative boss and the fourth positive boss are arranged in the first column, the first negative boss and the second positive boss are arranged in the second column, the second negative boss and the fourth negative boss are arranged in the third column, and the third positive boss and the first positive boss are arranged in the fourth column. The first column, the second column, the third column and the fourth column are parallel to each other and are arranged at intervals. When the rotating component rotates to the second target area, the trigger member is electrically contacted with the first column, the second column, the third column and the fourth column respectively, so that the bosses in the first column are connected to each other, the bosses in the second column are connected to each other, the bosses in the third column are connected to each other, and the bosses in the fourth column are connected to each other. At this time, 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.

[0012] As a further improvement of the present invention, in the third target area, the second negative boss and the third positive boss are arranged in the first column, the first negative boss and the second positive boss are arranged in the second column, and the third negative boss and the fourth positive boss are arranged in the third column. The first column, the second column and the third column are parallel to each other and are spaced apart. When the rotating component rotates to the third target area, the trigger member is electrically contacted with the first column, the second column and the third column respectively, so that the bosses in the first column are connected to each other, the bosses in the second column are connected to each other, and the bosses in the third column are connected to each other. At this time, 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.

[0013] As a further improvement of the present invention, the housing assembly includes an upper housing, a lower housing, and a receiving space formed between the upper housing and the lower housing, and the battery pack and the control assembly are both received in the receiving space.

[0014] As a further improvement of the present invention, a through hole is provided on the upper shell, and the rotating part on the rotating body protrudes out of the upper shell from the through hole, so that when the rotating part is pulled, the rotating body and the trigger part are driven to rotate and switch synchronously between the first target area, the second target area and the third target area.

[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 and having at least three target areas;

[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 power tool, the control assembly is rotated to a first target area, 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 power tool, the control assembly is rotated to a second target area, 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 is rotated to a third target area, 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 fixed component and a rotating component rotatable relative to the fixed component, the fixed component is formed with a connector electrically connected to the battery pack, the connector includes a first connector located in a first target area, a second connector located in a second target area, and a third connector located in a third target area, a trigger component is formed on the rotating component, when the rotating component rotates to the first target area, the trigger component is electrically connected to the first connector; when the rotating component rotates to the second target area, the trigger component is electrically connected to the second connector; when the rotating component rotates to the third target area, the trigger component is electrically connected to the third connector.

[0025] As a further improvement of the present invention, the rotating component includes a rotating body and a rotating part formed on the rotating body, the trigger part is embedded in the rotating body and exposed on the surface of the rotating body facing the fixed component, and the rotating part protrudes outward from the surface of the rotating body facing away from the fixed component, so that when the rotating part is pulled, the rotating body and the trigger part are driven to rotate synchronously.

[0026] As a further improvement of the present invention, a protrusion is provided on the circumferential outer edge of the rotating body, and a corresponding receiving groove is provided on the inner side wall of the shell assembly, and at least three receiving grooves are provided to correspond to three target areas respectively, so that when the rotating assembly rotates and switches between the first target area, the second target area and the third target area, the protrusion is limited and received in the receiving groove of the corresponding target area.

[0027] As a further improvement of the present invention, the first connecting member, the second connecting member and the third connecting member each include a first positive protrusion connected to the positive electrode of the first battery cell module, a first negative protrusion connected to the negative electrode of the first battery cell module, a second positive protrusion connected to the positive electrode of the second battery cell module, a second negative protrusion connected to the negative electrode of the second battery cell module, a third positive protrusion connected to the positive electrode of the third battery cell module, a third negative protrusion connected to the negative electrode of the third battery cell module, a fourth positive protrusion connected to the positive electrode of the fourth battery cell module, and a fourth negative protrusion connected to the negative electrode of the fourth battery cell module.

[0028] As a further improvement of the present invention, in the first target area, the first positive boss, the second positive boss, the third positive boss and the fourth positive boss are arranged in a first column, and the first negative boss, the second negative boss, the third negative boss and the fourth negative boss are arranged in a second column, and the first column and the second column are parallel to each other and spaced apart. When the rotating component rotates to the first target area, the trigger member is electrically contacted with the first column and the second column respectively, so that the positive bosses in the first column are connected to each other and the negative bosses in the second column are connected to each other. At this time, 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 to each other.

[0029] As a further improvement of the present invention, in the second target area, the third negative boss and the fourth positive boss are arranged in the first column, the first negative boss and the second positive boss are arranged in the second column, the second negative boss and the fourth negative boss are arranged in the third column, and the third positive boss and the first positive boss are arranged in the fourth column. The first column, the second column, the third column and the fourth column are parallel to each other and are arranged at intervals. When the rotating component rotates to the second target area, the trigger member is electrically contacted with the first column, the second column, the third column and the fourth column respectively, so that the bosses in the first column are connected to each other, the bosses in the second column are connected to each other, the bosses in the third column are connected to each other, and the bosses in the fourth column are connected to each other. At this time, 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, in the third target area, the second negative boss and the third positive boss are arranged in the first column, the first negative boss and the second positive boss are arranged in the second column, and the third negative boss and the fourth positive boss are arranged in the third column. The first column, the second column and the third column are parallel to each other and are spaced apart. When the rotating component rotates to the third target area, the trigger member is electrically contacted with the first column, the second column and the third column respectively, so that the bosses in the first column are connected to each other, the bosses in the second column are connected to each other, and the bosses in the third column are connected to each other. At this time, 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.

[0031] 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.

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

[0033] A battery pack, the battery pack comprising a shell component, a battery pack contained in the shell component, and a control component 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 component is rotatably arranged and has at least three target areas, when the control component rotates to the first target area, the battery pack outputs a first voltage value; when the control component rotates to the second target area, the battery pack outputs a second voltage value; when the control component rotates to the third target area, 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 rotates to a first target area, 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 control component to dock with connectors in different target areas, 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 3 Another angled stereoscopic view of the upper and middle shell.

[0040] Figure 5 yes Figure 2 Partial exploded view of the control assembly connected to the conductive sheet.

[0041] Figure 6 yes Figure 5 A perspective view of the fixing components.

[0042] Figure 7 yes Figure 6 Another perspective view of the fixing assembly shown.

[0043] Figure 8 yes Figure 5 A three-dimensional view of the rotating component.

[0044] Fig. 9 yes Figure 8 Another perspective view of the rotating assembly shown.

[0045] Fig.10 yes Figure 2 A perspective view of the external coupling.

[0046] Fig.11 yes Fig.10 The schematic diagram of the circuit when the rotating assembly is rotated to the first target area after the external coupling is inserted.

[0047] Fig.12 yes Fig.10 The schematic diagram of the circuit when the rotating assembly is rotated to the second target area after the external coupling is inserted.

[0048] Fig.13 yes Fig.10 The schematic diagram of the circuit when the rotating assembly is rotated to the third target area after the external coupling is inserted. DETAILED DESCRIPTION

[0049] 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.

[0050] like Figure 1 and Figure 2As 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.

[0051] like Figures 2 to 4 As 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. A through hole 14 is 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 connected to 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 connected to the external coupling member 50 as a total negative output terminal, so as to realize the output of the voltage in the battery pack.

[0052] 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.

[0053] 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.

[0054] like Figures 5 to 9As shown, the control component 40 is rotatably set and has at least three target areas. When the control component 40 rotates to the first target area a, 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 with each other, and the battery pack outputs a first voltage value; when the control component 40 rotates to the second target area b, 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 control component 40 rotates to the third target area c, 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 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.

[0055] Specifically, the control component 40 includes a fixed component 41 and a rotating component 42 rotatable relative to the fixed component 41, and a connector electrically connected to the battery pack 20 is formed on the fixed component 41, and the connector includes a first connector 43 located in the first target area a, a second connector 44 located in the second target area b, and a third connector 45 located in the third target area c. A trigger component 420 is formed on the rotating component 42, and when the rotating component 42 rotates to the first target area a, the trigger component 420 is electrically connected to the first connector 43; when the rotating component 42 rotates to the second target area b, the trigger component 420 is electrically connected to the second connector 44; when the rotating component 42 rotates to the third target area c, the trigger component 420 is electrically connected to the third connector 45.

[0056] In this embodiment, the first connecting member 43 , the second connecting member 44 and the third connecting member 45 are all formed on the conductive sheet 21 at one end and inserted and fixed on the fixing component 41 at the other end.

[0057] The fixing assembly 41 includes a first fixing portion 411 and a second fixing portion 412 arranged in a disc shape and a connecting portion 413 connecting the first fixing portion 411 and the second fixing portion 412. The diameter of the first fixing portion 411 is smaller than the diameter of the second fixing portion 412. The first fixing portion 411 is embedded in the PCB board 30 to achieve a fixed connection between the fixing assembly 41 and the PCB board 30. The connecting portion 413 is arranged perpendicular to the PCB board 30 so that there is a gap between the second fixing portion 412 and the PCB board 30. A hole 414 is provided at the center of the second fixing portion 412. The first target area a, the second target area b and the third target area c are distributed on the second fixing portion 412 of the fixing assembly 41, and a plurality of through holes 415 are provided in the first target area a, the second target area b and the third target area c. These through holes 415 are all arranged through the second fixing portion 412 so that the corresponding first connecting member 43, the second connecting member 44 and the third connecting member 45 pass through and are exposed on the upper surface of the second fixing portion 412.

[0058] The trigger members 420 on the rotating component 42 are arranged in a rectangular strip shape and are four in number. The four trigger members 420 are parallel to each other and arranged at intervals, and are used to electrically connect to the first connecting member 43, the second connecting member 44 or the third connecting member 45 on the second fixed portion 412, so as to achieve electrical connection between the trigger member 420 and the battery pack 20.

[0059] The first connecting member 43, the second connecting member 44 and the third connecting member 45 all include a first positive protrusion A+ connected to the positive pole of the first battery module A, a first negative protrusion A- connected to the negative pole of the first battery module A, a second positive protrusion B+ connected to the positive pole of the second battery module B, a second negative protrusion B- connected to the negative pole of the second battery module B, a third positive protrusion C+ connected to the positive pole of the third battery module C, a third negative protrusion C- connected to the negative pole of the third battery module C, a fourth positive protrusion D+ connected to the positive pole of the fourth battery module D, and a fourth negative protrusion D- connected to the negative pole of the fourth battery module D, wherein the first positive protrusion A+ is electrically connected to the positive terminal 16, and the fourth negative protrusion D- is electrically connected to the negative terminal 17.

[0060] In the first target area a, the first positive boss A+, the second positive boss B+, the third positive boss C+ and the fourth positive boss D+ are arranged in the first column, and the first negative boss A-, the second negative boss B-, the third negative boss C- and the fourth negative boss D- are arranged in the second column. The first column and the second column are parallel to each other and are spaced apart. When the rotating component 42 rotates to the first target area a, two trigger members 420 are electrically contacted with the first column and the second column respectively, so that the positive bosses in the first column are connected to each other and the negative bosses in the second column are connected to each other. At this time, 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 first voltage value output by the battery pack is "n" V.

[0061] In the second target area b, the third negative convex column C- and the fourth positive convex column D+ are arranged in the first column, the first negative convex column A- and the second positive convex column B+ are arranged in the second column, the second negative convex column B- and the fourth negative convex column D- are arranged in the third column, and the third positive convex column C+ and the first positive convex column A+ are arranged in the fourth column. The first column, the second column, the third column and the fourth column are parallel to each other and are arranged at intervals. When the rotating component 42 rotates to the second target area b, the four triggering members 420 are respectively connected to the first column, the second column, The third column and the fourth column are electrically contacted, so that the bosses in the first column are interconnected, the bosses in the second column are interconnected, the bosses in the third column are interconnected, and the bosses in the fourth column are interconnected. At this time, 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. After that, the first battery string and the second battery string are connected in parallel (that is, the "series first and then parallel" connection method), and the second voltage value of the battery pack output is "2n" V.

[0062] In the third target area c, the second negative protrusion B- and the third positive protrusion C+ are arranged in the first column, the first negative protrusion A- and the second positive protrusion B+ are arranged in the second column, and the third negative protrusion C- and the fourth positive protrusion D+ are arranged in the third column. The first column, the second column and the third column are parallel to each other and spaced apart. When the rotating component 42 rotates to the third target area c, the three trigger members 420 are respectively electrically contacted with the first column, the second column and the third column, so that the protrusions in the first column are connected to each other, the protrusions in the second column are connected to each other, and the protrusions in the third column are connected to each other. At this time, 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 third voltage value output by the battery pack is "4n" V.

[0063] Of course, when the rotating component 42 rotates to the second target area b, 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.

[0064] In addition, a fourth target area d is provided on the second fixing portion 412. The fourth target area d is a part of the second fixing portion 412 and is not provided with any bosses to electrically connect with the battery pack 20. Therefore, when the rotating component 42 rotates to the fourth target area d, the battery pack has no voltage output. At this time, the battery pack can be transported over long distances or other non-powered operations can be performed in a protected state, thereby protecting the battery pack and the operator.

[0065] The rotating assembly 42 includes a rotating body 421 and a rotating member 422 formed on the rotating body 421. The trigger member 420 is embedded in the rotating body 421 and exposed on the surface of the rotating body 421 facing the fixed assembly 41, so that the trigger member 420 can achieve electrical contact with the corresponding first connecting member 43, second connecting member 44 or third connecting member 45 during rotation. A limiting rod 423 is formed at the bottom of the rotating body 421, and the limiting rod 423 is used to pass through the hole 414 on the second fixed part 412, so as to achieve the connection between the rotating assembly 42 and the fixed assembly 41, and enable the rotating assembly 42 to rotate flexibly when the rotating member 422 is pulled.

[0066] Combination Figure 4 As shown, a protrusion 424 is provided on the circumferential outer edge of the rotating body 421, and a receiving groove 18 is correspondingly provided on the inner side wall of the upper shell 11, and at least three receiving grooves 18 are provided to correspond to the first target area a, the second target area b and the third target area c, respectively, so that when the rotating component 42 is rotated and switched between the first target area a, the second target area b and the third target area c, the protrusion 424 is limited and received in the receiving groove 18 of the corresponding target area. In this embodiment, four protrusions 424 are provided and evenly distributed on the circumferential outer edge of the rotating body 421; four protrusions 19 are correspondingly provided on the inner side wall of the upper shell 11, and each protrusion 19 is provided with a receiving groove 18, so that when the rotating component 42 is rotated and switched between the first target area a, the second target area b, the third target area c and the fourth target area d, the four protrusions 424 and the four receiving grooves 18 can be used to fix the rotating component 42 by mutual limitation, thereby enhancing the structural stability of the rotating component 42.

[0067] Of course, in other embodiments, the number of protrusions 424 may be one, two, or three, and the number of receiving grooves 18 may be three or four, as long as the rotating assembly 42 can be fixed, and there is no limitation here.

[0068] The rotating member 422 protrudes outward from the surface of the rotating body 421 on the side away from the fixed component 41, so that when the rotating member 422 is pulled, the rotating body 421 and the trigger member 420 are driven to rotate synchronously. In this embodiment, the rotating member 422 protrudes from the through hole 14 at the top of the upper shell 11, so that when the rotating member 422 is pulled, the rotating body 421 and the trigger member 420 are driven to rotate and switch synchronously between the first target area a, the second target area b, the third target area c and the fourth target area d.

[0069] The external coupling member 50 includes a first external coupling member, a second external coupling member and a third external coupling member. 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 member is arranged on the first electric tool; the second electric tool can operate at a second rated voltage, and the second external coupling member is arranged on the second electric tool; the third electric tool can operate at a third rated voltage, and the third external coupling member is arranged on the third electric tool. The following will take these three external coupling members 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] In this embodiment, the rotation of the rotating assembly 42 is achieved by manually rotating the rotating member 422, so the structures of the first external coupling member, the second external coupling member and the third external coupling member may be completely the same or different. For the convenience of description, the following will be described by taking the external coupling members of the same structure as an example.

[0071] like Fig.10 As shown, the external coupling component 50 includes a main body 51 and a positive electrode plug-in piece 52 and a negative electrode plug-in piece 53 integrally formed with the main body 51. After the external coupling component 50 is inserted, the positive electrode plug-in piece 52 is plugged into the positive terminal 16, and the negative electrode plug-in piece 53 is plugged into the negative terminal 17, thereby realizing the electrical and mechanical connection between the battery pack and the external coupling component 50, and realizing the transmission of current and voltage.

[0072] like Fig.11As shown, when the battery pack is connected to the first electric tool, the rotating member 422 is manually rotated to rotate the rotating assembly 42 as a whole to the first target area a. At this time, the first trigger member 420 at the bottom of the rotating body 421 connects the first positive convex column A+, the second positive convex column B+, the third positive convex column C+ and the fourth positive convex column D+, and the fourth trigger member 420 connects the first negative convex column A-, the second negative convex column B-, the third negative convex column C- and the fourth negative convex column D-, so that 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. According to the principle of "parallel voltage division and series current division", the first voltage value output by the battery pack is equal to the rated output voltage of each battery module, that is, U = u1 = u2 = u3 = u4 = 20V.

[0073] like Fig.12 As shown, when the battery pack is connected to the second electric tool, the rotating member 422 is manually rotated to rotate the rotating assembly 42 as a whole to the second target area b. At this time, the first trigger member 420 at the bottom of the rotating body 421 connects the third negative protrusion C- with the fourth positive protrusion D+, the second trigger member 420 connects the first negative protrusion A- with the second positive protrusion B+, the third trigger member 420 connects the second negative protrusion B- with the fourth negative protrusion D-, and the fourth trigger member 420 connects the third positive protrusion C+ with the first positive protrusion A+, 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, i.e., U=u1+u2=u3+u4=40V.

[0074] like Fig.13 As shown, when the battery pack is connected to the third electric tool, the rotating member 422 is manually rotated to rotate the rotating assembly 42 as a whole to the third target area c. At this time, the first trigger member 420 at the bottom of the rotating body 421 connects the second negative protrusion B- with the third positive protrusion C+, the second trigger member 420 connects the first negative protrusion A- with the second positive protrusion B+, and the fourth trigger member 420 connects the third negative protrusion C- with the fourth positive protrusion D+, so that 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 at this time is equal to the sum of the rated output voltages of the four battery modules, that is, U = u1 + u2 + u3 + u4 = 80V.

[0075] According to the above description, it can be seen that after rotating the rotating assembly 42 to different target areas, different voltage outputs of the battery pack can be achieved, thereby meeting the voltage requirements of three different power tools, and the switching between the three voltages is fast and convenient. After the power transmission is completed, the rotating assembly 42 is rotated as a whole to the fourth target area d, and then the external coupling member 50 is pulled out.

[0076] Of course, in other embodiments, the rotation of the rotating member 422 can also be set to be automatically triggered. In this case, it is necessary to set a trigger component on the first external coupling member, the second external coupling member and the third external coupling member corresponding to different voltages. When the battery pack is connected to the first electric tool or the second electric tool or the third electric tool, the corresponding trigger component can be used to trigger the rotating member 422 to rotate the rotating component 42 to the corresponding target area and the battery pack output voltage.

[0077] Preferably, the trigger component can be a protrusion protruding from the first external coupling member, the second external coupling member or the third external coupling member, and the protrusion can be used to push the rotating member 422 to rotate; the trigger component can also be a toothed rack provided on the first external coupling member, the second external coupling member or the third external coupling member, in which case, only corresponding teeth need to be provided on the rotating member 422, and the mutual engagement of the two teeth can realize that the trigger component pushes the rotating member 422 to rotate. Of course, this should not be limited to this.

[0078] 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 rotating assembly 42 is rotated to the first target area a. 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.

[0079] In summary, the battery pack of the present invention utilizes the rotation of the rotating component 42 to dock with connectors in different target areas, so as to achieve series-parallel state switching of each battery cell module in the battery pack, and then change 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.

[0080] 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 shell assembly includes an upper shell, a lower shell and a receiving space formed between the upper shell and the lower shell, and the battery pack and the control assembly are both received in the receiving space; the control assembly is rotatably arranged and has at least three target areas, the control assembly includes a fixed assembly and a rotating assembly rotatable relative to the fixed assembly, a connecting member electrically connected to the battery pack is formed on the fixed assembly, and a trigger member is formed on the rotating assembly, the connecting member includes a first positive protrusion connected to the positive pole of the first battery cell module, a first negative protrusion connected to the negative pole of the first battery cell module, a second positive protrusion connected to the positive pole of the second battery cell module, a second negative protrusion connected to the negative pole of the second battery cell module, a third positive protrusion connected to the positive pole of the third battery cell module, a third negative protrusion connected to the negative pole of the third battery cell module, a fourth positive protrusion connected to the positive pole of the fourth battery cell module, and a fourth negative protrusion connected to the negative pole of the fourth battery cell module; When the rotating component rotates to the first target area, 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, and the battery pack outputs a first voltage value; when the rotating component rotates to the second target area, 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 rotating component rotates to the third target area, 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 smaller than the second voltage value, and the second voltage value is smaller than the third voltage value.

2. The battery pack according to claim 1, characterized in that: The connecting member includes a first connecting member located in a first target area, a second connecting member located in a second target area, and a third connecting member located in a third target area. When the rotating component rotates to the first target area, the trigger member is electrically connected to the first connecting member; when the rotating component rotates to the second target area, the trigger member is electrically connected to the second connecting member; when the rotating component rotates to the third target area, the trigger member is electrically connected to the third connecting member.

3. The battery pack according to claim 2, characterized in that: The rotating assembly includes a rotating body and a rotating member formed on the rotating body, the trigger member is embedded in the rotating body and exposed on the surface of the rotating body facing the fixed assembly, and the rotating member protrudes outward from the surface of the rotating body facing away from the fixed assembly, so that when the rotating member is pulled, the rotating body and the trigger member are driven to rotate synchronously.

4. The battery pack according to claim 3, characterized in that: A protrusion is provided on the circumferential outer edge of the rotating body, and a receiving groove is correspondingly provided on the inner side wall of the shell assembly, and at least three receiving grooves are provided to correspond to three target areas respectively, so that when the rotating assembly rotates and switches between the first target area, the second target area and the third target area, the protrusion is limited and received in the receiving groove of the corresponding target area.

5. The battery pack according to claim 1, characterized in that: In the first target area, the first positive boss, the second positive boss, the third positive boss and the fourth positive boss are arranged in the first column, and the first negative boss, the second negative boss, the third negative boss and the fourth negative boss are arranged in the second column, and the first column and the second column are parallel to each other and spaced apart. When the rotating component rotates to the first target area, the trigger member electrically contacts the first column and the second column respectively, so that the positive bosses in the first column are connected to each other and the negative bosses in the second column are connected to each other. At this time, 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 to each other.

6. The battery pack according to claim 1, characterized in that: In the second target area, the third negative boss and the fourth positive boss are arranged in the first column, the first negative boss and the second positive boss are arranged in the second column, the second negative boss and the fourth negative boss are arranged in the third column, and the third positive boss and the first positive boss are arranged in the fourth column. The first column, the second column, the third column and the fourth column are parallel to each other and are arranged at intervals. When the rotating component rotates to the second target area, the trigger member is electrically contacted with the first column, the second column, the third column and the fourth column respectively, so that the bosses in the first column are connected to each other, the bosses in the second column are connected to each other, the bosses in the third column are connected to each other, and the bosses in the fourth column are connected to each other. At this time, 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.

7. The battery pack according to claim 1, characterized in that: In the third target area, the second negative boss and the third positive boss are arranged in the first column, the first negative boss and the second positive boss are arranged in the second column, and the third negative boss and the fourth positive boss are arranged in the third column. The first column, the second column and the third column are parallel to each other and are spaced apart. When the rotating component rotates to the third target area, the trigger member is electrically contacted with the first column, the second column and the third column respectively, so that the bosses in the first column are connected to each other, the bosses in the second column are connected to each other, and the bosses in the third column are connected to each other. At this time, 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.

8. The battery pack according to claim 3, characterized in that: A through hole is provided on the upper shell, and a rotating member on the rotating body protrudes out of the upper shell from the through hole, so that when the rotating member is pulled, the rotating body and the trigger member are driven to rotate and switch synchronously between the first target area, the second target area and the third target area.

9. A tool 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 shell assembly comprising an upper shell, a lower shell, and a containing space formed between the upper shell and the lower shell, the battery pack and the control assembly are both contained in the containing space; 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, the control assembly is rotatably arranged and has at least three target areas, the control assembly comprises a fixed assembly and a rotating assembly rotatable relative to the fixed assembly, the A connector electrically connected to the battery pack is formed on the fixed component, and a trigger component is formed on the rotating component, the connector including a first positive protrusion connected to the positive electrode of the first battery cell module, a first negative protrusion connected to the negative electrode of the first battery cell module, a second positive protrusion connected to the positive electrode of the second battery cell module, a second negative protrusion connected to the negative electrode of the second battery cell module, a third positive protrusion connected to the positive electrode of the third battery cell module, a third negative protrusion connected to the negative electrode of the third battery cell module, a fourth positive protrusion connected to the positive electrode of the fourth battery cell module, and a fourth negative protrusion connected to the negative electrode of the fourth battery cell module; 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 rotating assembly is rotated to a first target area, 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 rotating assembly is rotated to a second target area, 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 rotating assembly is rotated to a third target area, 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.

10. The tool system according to claim 9, 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.

11. The tool system according to claim 9, characterized in that: The connecting member includes a first connecting member located in a first target area, a second connecting member located in a second target area, and a third connecting member located in a third target area. When the rotating component rotates to the first target area, the trigger member is electrically connected to the first connecting member; when the rotating component rotates to the second target area, the trigger member is electrically connected to the second connecting member; when the rotating component rotates to the third target area, the trigger member is electrically connected to the third connecting member.

12. The tool system according to claim 11, characterized in that: The rotating assembly includes a rotating body and a rotating member formed on the rotating body, the trigger member is embedded in the rotating body and exposed on the surface of the rotating body facing the fixed assembly, and the rotating member protrudes outward from the surface of the rotating body facing away from the fixed assembly, so that when the rotating member is pulled, the rotating body and the trigger member are driven to rotate synchronously.

13. The tool system according to claim 12, characterized in that: A protrusion is provided on the circumferential outer edge of the rotating body, and a receiving groove is correspondingly provided on the inner side wall of the shell assembly, and at least three receiving grooves are provided to correspond to three target areas respectively, so that when the rotating assembly rotates and switches between the first target area, the second target area and the third target area, the protrusion is limited and received in the receiving groove of the corresponding target area.

14. The tool system according to claim 9, characterized in that: In the first target area, the first positive boss, the second positive boss, the third positive boss and the fourth positive boss are arranged in the first column, and the first negative boss, the second negative boss, the third negative boss and the fourth negative boss are arranged in the second column, and the first column and the second column are parallel to each other and spaced apart. When the rotating component rotates to the first target area, the trigger member electrically contacts the first column and the second column respectively, so that the positive bosses in the first column are connected to each other and the negative bosses in the second column are connected to each other. At this time, 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 to each other.

15. The tool system according to claim 9, characterized in that: In the second target area, the third negative boss and the fourth positive boss are arranged in the first column, the first negative boss and the second positive boss are arranged in the second column, the second negative boss and the fourth negative boss are arranged in the third column, and the third positive boss and the first positive boss are arranged in the fourth column. The first column, the second column, the third column and the fourth column are parallel to each other and are arranged at intervals. When the rotating component rotates to the second target area, the trigger member is electrically contacted with the first column, the second column, the third column and the fourth column respectively, so that the bosses in the first column are connected to each other, the bosses in the second column are connected to each other, the bosses in the third column are connected to each other, and the bosses in the fourth column are connected to each other. At this time, 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.

16. The tool system according to claim 9, characterized in that: In the third target area, the second negative boss and the third positive boss are arranged in the first column, the first negative boss and the second positive boss are arranged in the second column, and the third negative boss and the fourth positive boss are arranged in the third column. The first column, the second column and the third column are parallel to each other and are spaced apart. When the rotating component rotates to the third target area, the trigger member is electrically contacted with the first column, the second column and the third column respectively, so that the bosses in the first column are connected to each other, the bosses in the second column are connected to each other, and the bosses in the third column are connected to each other. At this time, 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 9, 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.

18. 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 having at least three target areas, the control assembly comprising a fixed assembly and a rotating assembly rotatable relative to the fixed assembly, a connecting member electrically connected to the battery pack being formed on the fixed assembly, a triggering member being formed on the rotating assembly, the connecting member comprising a first positive protrusion connected to the positive electrode of the first battery cell module, a first negative protrusion connected to the negative electrode of the first battery cell module, a second positive protrusion connected to the positive electrode of the second battery cell module, a second negative protrusion connected to the negative electrode of the second battery cell module, a third positive protrusion connected to the positive electrode of the third battery cell module, a third negative protrusion connected to the negative electrode of the third battery cell module, a fourth positive protrusion connected to the positive electrode of the fourth battery cell module, and a fourth negative protrusion connected to the negative electrode of the fourth battery cell module; When the rotating component rotates to the first target area, the battery pack outputs a first voltage value; when the rotating component rotates to the second target area, the battery pack outputs a second voltage value; when the rotating component rotates to the third target area, 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 is used to charge the battery pack. When the charger is docked with the battery pack for charging, the control component rotates to a first target area, 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.

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