Power Tool System

Abstract

The present invention provides a battery pack, comprising a housing, a battery module, a switching assembly and an interface for coupling with an external electrical device, wherein the interface is electrically connected to the battery module to achieve energy input and / or output, the switching assembly and the battery module are both contained in the housing, the battery module comprises a plurality of battery cell groups, the switching assembly is electrically connected to the battery module, and the switching assembly switches the combination of the plurality of battery cell groups by rotating. The switching assembly of the battery pack has a simple structure, is easy to switch, and operates reliably. The present invention also provides an electric tool system comprising 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 and an electric tool system having the battery pack. Background Art

[0002] Battery packs are increasingly used as rechargeable power sources for outdoor tools, especially cordless power tools. Cordless power tools usually have a rated operating voltage, and different cordless power tools often have different rated operating voltages. Cordless power tools with different rated operating voltages require corresponding battery packs with different output voltages to provide power. Therefore, when operators operate different cordless power tools outdoors, they need to carry multiple battery packs with corresponding output voltages. Since the battery pack will generate a large load, it brings great inconvenience to the operator. To solve this problem, relevant technicians have developed a battery pack that can realize dual voltage switching. This battery pack can change the series-parallel mode of the battery modules inside the battery pack to output two voltages, thereby adapting to two cordless power tools with different rated voltages. The battery pack that can realize dual voltage switching greatly improves the convenience of operation, but the existing battery pack that can realize dual voltage switching has a complex structure and high production and manufacturing cost.

[0003] In view of this, it is necessary to provide a battery pack with a simple structure and capable of switching voltage to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a battery pack capable of switching between two voltages and an electric tool system having the battery pack. The battery pack has a simple structure, convenient voltage switching, and is conducive to stabilizing the output voltage. At the same time, the structure of the battery pack reduces the mechanical matching tolerance requirements between the battery pack and the electric tool.

[0005] Specifically, the present invention is implemented through the following technical solutions: a battery pack, comprising a shell, a battery module, a switching assembly and an interface for coupling with an external electrical device, the interface being electrically connected to the battery module to achieve energy input and / or output, the switching assembly and the battery module being both accommodated in the shell, the battery module comprising a plurality of battery cell groups, the switching assembly being electrically connected to the battery module to switch the combination of a plurality of battery cell groups in the battery module to achieve output voltage switching, and the switching assembly switches the combination of a plurality of battery cell groups by rotating.

[0006] As a further improvement of the present invention, the switching assembly includes a plurality of converters, and the converters are rotatably positioned in the housing.

[0007] As a further improvement of the present invention, the converter includes a switching part that can be mechanically triggered and a switch part driven by the switching part. After being mechanically triggered, the switching part rotates and drives the switch part to move to switch the combination of multiple battery cell groups.

[0008] As a further improvement of the present invention, the switching part includes a switching button and a pressure rod, the switching button is rotatably positioned in the shell, one end of the pressure rod is connected to the switching button and the pressure rod can float relative to the switching button, and the other end of the pressure rod is always pressed against the switch part.

[0009] As a further improvement of the present invention, an elastic member is provided between the pressure rod and the switch button so that the pressure rod is always in contact with the switch portion.

[0010] As a further improvement of the present invention, the switch part includes a switch fixing seat and a movable switch driven by the switching part, the movable switch is rotatably connected to the switch fixing seat, and the movable switch is configured with a first position for connecting the same polarity of multiple battery cell groups and a second position for connecting different polarities of multiple battery cell groups.

[0011] As a further improvement of the present invention, the movable switch is in a seesaw shape, and convex bulges are provided at both ends of the movable switch.

[0012] As a further improvement of the present invention, the battery pack also includes an intermediate connector, each of the battery cell groups has a positive electrode and a negative electrode, the intermediate connector is electrically connected to the positive electrode and the negative electrode of each of the battery cell groups, and the switching component switches the combination of multiple battery cell groups by rotating the electrical connection method with the intermediate connector.

[0013] As a further improvement of the present invention, the battery cell group includes a first battery cell group and a second battery cell group, and the output voltages of the first battery cell group and the second battery cell group are equal.

[0014] As a further improvement of the present invention, the switching assembly includes two converters, the switch parts of the two converters are independent of each other, and the two switch fixing seats of the two switch parts are respectively electrically contacted with different electrodes of the first battery cell group and the second battery cell group, and the movable switch and the switch fixing seat are both made of conductive materials and electrical contact is maintained between the movable switch and the switch fixing seat.

[0015] As a further improvement of the present invention, the battery pack also includes an intermediate connector, which includes a first positive electrode sheet and a first negative electrode sheet electrically connected to the positive electrode and negative electrode of the first battery pack unit, respectively, and a second positive electrode sheet and a second negative electrode sheet electrically connected to the positive electrode and negative electrode of the second battery cell group, respectively.

[0016] As a further improvement of the present invention, one of the switch fixing bases is electrically connected to the first negative electrode sheet, and the other switch fixing base is electrically connected to the second positive electrode sheet.

[0017] As a further improvement of the present invention, the intermediate connector further includes an intermediate electrode sheet, and the switch unit connects the first battery cell group and the second battery cell group with different polarities through the intermediate electrode sheet so that the first battery cell group and the second battery cell group are connected in series.

[0018] As a further improvement of the present invention, two opposite sides of the switch button are respectively provided with a series trigger part and a parallel trigger part, and the series trigger part and the parallel trigger part are respectively located on both sides of the rotation axis of the switch button.

[0019] As a further improvement of the present invention, the active switch is further configured with a third position. When the active switch is located at the third position, the switch portion is disconnected from the battery module, and the output voltage of the battery module is 0.

[0020] As a further improvement of the present invention, the two switching buttons of the two converters are independent of each other.

[0021] As a further improvement of the present invention, the two switching buttons of the two converters are connected into one.

[0022] An electric tool system of the present invention includes a first electric tool with a first rated voltage, a second electric tool with a second rated voltage, and a battery pack for providing energy to the first electric tool and the second electric tool, the battery pack including a shell, a battery module, a switching assembly and an interface, the interface is electrically connected to the battery module to achieve energy input and / or output, the switching assembly and the battery module are both accommodated in the shell, the battery module includes a plurality of battery cell groups, the switching assembly is electrically connected to the battery module, and the switching assembly switches the combination of the plurality of battery cell groups by rotating, when the first electric tool is coupled to the interface of the battery pack, the battery pack outputs a first voltage to supply the first electric tool, and when the second electric tool is coupled to the interface of the battery pack, the battery pack outputs a second voltage to supply the second electric tool.

[0023] As a further improvement of the present invention, the power tool system also includes a first trigger electrically connected to the first power tool and a second trigger electrically connected to the second power tool, the first trigger and the second trigger both having a trigger protrusion that can trigger the switching component, and the first power tool and the second power tool respectively cause the battery pack to output a first voltage or a second voltage through the first trigger and the second trigger.

[0024] As a further improvement of the present invention, an opening corresponding to the switching assembly is provided on the housing, and the triggering protrusions on the first trigger and the second trigger trigger the switching assembly through the opening.

[0025] The beneficial effects of the present invention are as follows: the battery pack of the present invention enables the battery pack to output two different voltages through a switching component, thereby realizing dual voltage switching, and the battery pack of the present invention has a simple structure, and the switching is convenient and fast. At the same time, the switching component of the present invention operates reliably, and can enable the switch part to stably act on the battery module and ultimately maintain a stable position state, thereby ensuring the stability of the output voltage.

[0026] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the battery pack of the present invention;

[0028] Figure 2 An exploded view of the battery pack of the present invention;

[0029] Figure 3 is a schematic diagram of the internal structure of the battery pack of the present invention;

[0030] Figure 4 is a schematic diagram of a main view of a converter in the present invention;

[0031] Figure 5 It is an exploded structural diagram of the switching part in the present invention;.

[0032] Figure 6 This is a schematic diagram of the arrangement structure of the battery module and the intermediate connector according to the first embodiment of the present invention;

[0033] Figure 7 This is a schematic diagram of the connection relationship between the switching component and the intermediate connecting member according to the first embodiment of the present invention;

[0034] Figure 8 This is a schematic diagram of the overall structure of a switching component according to Embodiment 1 of the present invention;

[0035] Fig. 9 A three-dimensional diagram of a first trigger according to a first embodiment of the present invention;

[0036] Fig.10 A three-dimensional diagram of a second trigger according to a first embodiment of the present invention;

[0037] Fig.11 This is a schematic diagram of the arrangement structure of the battery module and the intermediate connecting member according to the second embodiment of the present invention;

[0038] Fig.12A diagram showing the connection relationship between the switching component and the intermediate connecting member according to the second embodiment of the present invention;

[0039] Fig.13 This is a schematic diagram of the overall structure of a switching component according to Embodiment 2 of the present invention;

[0040] Fig.14 A three-dimensional diagram of a first trigger according to a second embodiment of the present invention;

[0041] Fig.15 It is a three-dimensional diagram of a second trigger according to the second embodiment of the present invention.

[0042] Fig.16 It is a schematic diagram of the overall structure of the battery pack of the present invention when connected to an external trigger. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein should be understood by people with general skills in the field to which the present invention belongs. "Including" and similar words used in this article mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0044] Embodiment 1

[0045] Combination Figures 1 to 10 As shown, the present invention provides a battery pack 100, which includes a housing 1, a switching assembly 2, a battery module 3 and an interface 7 for coupling with an external electrical device. The housing 1 is provided with a receiving cavity (not shown in the figure), and the switching assembly 2 and the battery module 3 are both arranged in the receiving cavity of the housing 1. Preferably, the housing 1 of this embodiment includes an upper housing 11 and a lower housing 12, and the upper housing 11 and the lower housing 12 form the above-mentioned receiving cavity for accommodating the battery module 3 and the switching assembly 2. The interface 7 is electrically connected to the above-mentioned battery module 3 to realize energy input and / or output. The interface 7 can be a structure such as a plug-in terminal that can be coupled with an external electrical device. Specifically, in this embodiment, the interface 5 includes a total positive output terminal 71 and a total negative output terminal 72. The energy of the battery module 3 is output through the total positive output terminal 71 and the total negative output terminal 72, and the external electrical device can be coupled to the battery pack through the total positive output terminal 71 and the total negative output terminal 72.

[0046] In this embodiment, the battery module 3 includes a plurality of battery cell groups, each of which is formed by connecting a plurality of battery cells in series or in parallel, and the output voltage of each battery cell group is equal, and the output voltage of each battery cell group is defined as nV.

[0047] The switching component 2 is electrically connected to the battery module 3 to switch the combination of multiple battery cell groups in the battery module 3 to achieve the switching of the output voltage. The switching component 2 can be directly electrically connected to the battery module 3. For example, the switching component 2 has a pin, and the pin is electrically connected to the battery module 3. At this time, the switching component 2 is directly electrically connected to the battery module 3. Of course, the switching component 2 can also be electrically connected to the battery module 3 through the intermediate connector 4, such as Figures 3 to 7 As shown, each battery cell group in the battery module 3 has a positive electrode and a negative electrode, the intermediate connector 4 is electrically connected to the positive electrode and the negative electrode of each battery cell group, and the switching component 2 realizes the electrical connection with the battery module 3. The switching component 2 switches the combination mode of multiple battery cell groups by rotating and switching the electrical connection mode with the intermediate connector 4. In this embodiment, the switching component 2 is preferably electrically connected to the battery module 3 through the intermediate connector 4.

[0048] It should be noted that the switching component 2 of this embodiment switches the combination mode of multiple battery cell groups by rotating. In this embodiment, the combination mode of multiple battery cell groups refers to the series-parallel connection mode between multiple battery cell groups, and the change of multiple battery cell groups from series connection to parallel connection is the change of their combination mode. The switching component 2 rotates from one position to another position to change the series-parallel connection mode of multiple battery cell groups, so that the battery pack 100 outputs different voltages.

[0049] The switching assembly 2 of the present embodiment includes a plurality of converters 20, and the converters 20 are rotatably positioned in the housing 1. The number of converters 20 is adapted to the number of battery cell groups. Generally speaking, if there are two battery cell groups, two converters 20 are provided. If there are three battery cell groups, three converters 20 are provided. The provision of different numbers of battery cell groups in the battery pack 100 has no effect on the specific structure of the converter 20. The only difference is the number of converters 20, and the structure of the converter 20 will not change.

[0050] like Figure 4 As shown, the converter 20 of this embodiment includes a switching part 21 that can be mechanically triggered and a switch part 22 driven by the switching part 21. After being mechanically triggered, the switching part 21 rotates and drives the switch part 22 to move to switch the combination of multiple battery cell groups.

[0051] More specifically, the switch portion 21 includes a switch button 211 and a pressure rod 212. The switch button 211 is rotatably positioned in the housing 1 through a rotating shaft 2113 or similar structure. The switch button 211 can be rotatably connected to the upper housing 11 through the rotating shaft 2113, or can be rotatably connected to a button fixing seat 23 through the rotating shaft 2113. The button fixing seat 23 can be installed above the battery module 3. One end of the pressure rod 212 is connected to the switch button 211, and the pressure rod 212 can float relative to the switch button 211. The other end of the pressure rod 212 is always pressed against the switch portion 22. In this embodiment, an elastic member 213 is provided between the pressure rod 212 and the switch button 211, so that the pressure rod 212 is always in contact with the switch portion 22. In this embodiment, the elastic member 213 is preferably a spring, and the bottom of the switch button 211 is provided with a cavity (not shown in the figure) for accommodating the installation of the pressure rod 212, and the top of the pressure rod 212 is provided with a cavity for accommodating the spring, and the two ends of the spring are respectively located in the cavity at the bottom of the switch button 211 and the cavity at the top of the pressure rod 212, and the two ends of the spring are respectively connected to the switch button 211 and the pressure rod 212.

[0052] The switch part 22 includes a switch fixing seat 222 and an active switch 221 driven by the switching part 21. The active switch 221 is rotatably connected to the switch fixing seat 222. In this embodiment, the rotation axis of the switching button 211 and the rotation axis of the active switch 221 are located in the same or two parallel planes. The switching assembly 2 is electrically connected to the intermediate connection member 4 through the switch part 22. The active switch 221 and the switch fixing seat 222 of this embodiment are both made of conductive materials such as metal materials, and the active switch 221 maintains electrical contact with the switch fixing seat 222. The switch fixing seat 222 is electrically connected to the intermediate connection member 4, so that the switching assembly 2 is electrically connected to the intermediate connection member 4. Preferably, the active switch 221 of this embodiment is in a seesaw shape. When one end of the active switch 221 moves downward under the action of the switching part 21, the other end thereof tilts upward. More preferably, convex bumps 2211 are provided at both ends of the active switch 221 of this embodiment. The provision of the convex bumps 2211 can make the electrical contact between the active switch 221 and the battery module 3 more stable. In addition, the bottom end of the pressure rod 212 of this embodiment is arranged in an arc shape to ensure that the pressure rod 212 can be closely attached to the movable switch 212 and smoothly drive the movable switch 212 to rotate.

[0053] The active switch 221 is configured with a first position for connecting multiple battery cell groups with different polarities and a second position for connecting multiple battery cell groups with the same polarity. When the active switch 221 is in the first position, multiple battery cell groups are connected in series, and the battery pack outputs a first voltage. When the active switch 221 is rotated and switched to the second position, multiple battery cell groups are connected in parallel, and the battery pack outputs a second voltage.

[0054] Furthermore, the switch button 211 of the present embodiment is provided with a series trigger portion 2111 and a parallel trigger portion 2112, and the series trigger portion 2111 and the parallel trigger portion 2112 are arranged on two opposite sides of the switch button 211, and the series trigger portion 2111 and the parallel trigger portion 2112 are respectively located on both sides of the rotation axis of the switch button 211. When an external force acts on the series trigger portion 2111 of the switch button 211, the switch button 211 rotates, and the active switch 221 is driven and rotated to the first position, and multiple battery cell groups are connected in series. When an external force acts on the parallel trigger portion 2112 of the switch button 211, the switch button 211 rotates in the opposite direction, and the active switch 221 is driven and rotated in the opposite direction to the second position, and multiple battery cell groups are connected in parallel. According to the principle of mechanics, when the switch part 21 drives the active switch 221 to rotate to a certain position, the switch part 21 will reach the dead point position. At this time, if there is no external force driving, the switch part 21 will be locked at this position, and the active switch 221 will also be locked at this position. We set this dead point position as the first position. Similarly, the switch part 21 will also reach a dead point position when rotating in the opposite direction, and this position is set as the second position. Therefore, when the active switch 221 moves to the first position and the second position, it will be locked. At this time, even if there is no external force, the active switch 221 will still remain in the first position or the second position. At this time, if a small external force such as a small force generated by vibration acts on the switching part 21, since an elastic member 213 is provided between the pressure rod 212 and the switching button 211, the pressure rod 212 will still always press the active switch 221, and the active switch 221 will be firmly locked in the first position or the second position, and there will be no relative displacement between the active switch 221 and the battery module 3, and there will be no wear between the active switch 221 and the battery module 3. In addition, during actual use, the vibration generated by external electrical equipment such as power tools will not affect the entire switching assembly 2, and the voltage output of the entire battery pack 100 is stable and reliable. In addition, since the active switch 211 is locked in the first position or the second position, even if the external force acting on the switching part 21 is removed, the active switch 221 will remain in the first position or the second position. Therefore, the structure of this embodiment can reduce the mechanical matching tolerance requirements between the battery pack 100 and external electrical equipment such as power tools, thereby facilitating production and manufacturing.

[0055] The battery module 3 of this embodiment is defined to include m battery cell groups, where m is an integer greater than or equal to 2. When the active switch 221 is in the first position, the multiple battery cell groups are connected in series in sequence, so that the output voltage of the battery module 3 is mnV, which is the first voltage; when the active switch 221 is in the second position, the multiple battery cell groups are connected in parallel in sequence, so that the output voltage of the battery module 3 is nV, which is the second voltage.

[0056] The battery cell group can actually be regarded as a division of several battery cells in the battery pack 100, that is, all the battery cells in the battery pack 100 are divided equally, and all the battery cells are divided into multiple equal modules, which are the above-mentioned battery cell groups. Therefore, in a practical sense, the effect achieved by setting two battery cell groups or three battery cell groups or more battery cell groups in the battery pack is the same. The only difference is that the number of modules into which the several battery cells are divided is inconsistent and the output voltage of each module (that is, each battery cell group) is inconsistent.

[0057] Since the actual effects achieved by setting two battery cell groups, three battery cell groups, or more battery cell groups in the battery pack 100 are the same, the present invention preferably divides the battery module 3 into two battery cell groups, and setting two battery cell groups is more practical. In order to better explain the working principle of the battery pack 100, the specific working principle of the battery pack 100 is explained below in combination with the structure that the battery module 3 includes two battery cell groups.

[0058] When the switch part 22 is in the second position, the positive electrodes of the two battery cell groups are connected, and the switch part 22 connects the negative electrodes of the two battery cell groups to achieve parallel connection of the two battery cell groups. When the switch part 22 is in the first position, the switch part 22 connects the different electrodes of the two battery cell groups to achieve series connection of the two battery cell groups.

[0059] The two battery cell groups are defined as a first battery cell group (not shown) and a second battery cell group (not shown), and the output voltages of the first battery cell group and the second battery cell group are equal. Correspondingly, the above-mentioned converter 20 is also provided with two, and the two converters 20 have two switching parts 21 and two switch parts 22.

[0060] The first battery cell group and the second battery module both have positive and negative electrodes for realizing energy output. The positive electrode of the first battery cell group is defined as the first positive electrode A+, the negative electrode of the first battery cell group is defined as the first negative electrode A-, the positive electrode of the second battery cell group is defined as the second positive electrode B+, and the negative electrode of the second battery cell group is defined as the second negative electrode B-. The above-mentioned intermediate connector 4 includes a plurality of electrode sheets electrically connected to the two battery cell groups, namely, a first positive electrode sheet 41 electrically connected to the first positive electrode A+, a first negative electrode sheet 42 electrically connected to the first negative electrode A-, a second positive electrode sheet 43 electrically connected to the second positive electrode B+, and a second negative electrode sheet 44 electrically connected to the second negative electrode B-. In this embodiment, the intermediate connector 4 also includes an intermediate electrode sheet 45. When the switch part 22 is located in the first position, the switch part 22 connects the two different electrodes of the two battery cell groups through the intermediate electrode sheet 45 to realize the series connection of the two battery cell groups. Of course, the intermediate connector 4 of this embodiment may further include a circuit board 46 , and the plurality of electrode sheets may be arranged on the circuit board 46 . The circuit board 46 is a prior art and will not be described in detail here.

[0061] In the battery pack of the present invention, the arrangement of the plurality of electrode sheets of the intermediate connector 4 can be various. As a preferred solution, Figure 3 , Figure 6 and Figure 7 As shown, the first negative electrode sheet 42 and the second negative electrode sheet 44 of this embodiment are arranged on the same side of the battery pack, the first positive electrode sheet 41 and the second positive electrode sheet 43 are arranged together on the opposite side of the battery pack, and at the same time, the middle electrode sheet 45 is arranged in the middle position, located between the two different electrode sheets of the two battery cell groups.

[0062] The above-mentioned movable switch 221 and switch fixing seat 222 are both made of conductive materials such as metal materials, and the movable switch 221 maintains electrical contact with the switch fixing seat 222. The two switch parts 22 of this embodiment are independent of each other. The two switch parts 22 include two movable switches 221 and two independent switch fixing seats 222. The two movable switches 221 are respectively arranged on the two switch fixing seats 222 and are electrically contacted with the corresponding switch fixing seats 222. The two switch fixing seats 222 are respectively electrically connected to different electrodes of the two battery cell groups. In this embodiment, the two switch fixing seats 222 are electrically contacted with the corresponding electrode sheets of the intermediate connecting member 4. When the switch part 22 is located at the first position, one end of the two movable switches 221 is electrically contacted with the intermediate electrode sheet 45. For the convenience of explanation, the two switch fixing seats 222 are defined as the first switch fixing seat 222a and the second switch fixing seat 222b, respectively. The first switch fixing seat 222a is in electrical contact with the second positive electrode sheet 43, and the second switch fixing seat 222b is in electrical contact with the first negative electrode sheet 42. In this way, the two movable switches 221 are respectively in electrical contact with the first negative electrode sheet 42 and the second positive electrode sheet 43. The two movable switches 221 are defined as the first movable switch 221a and the second movable switch 221b. When one end of the first movable switch 221a moves to the position of being in electrical contact with the second negative electrode sheet 44, and the second movable switch 221b moves to the position of being in electrical contact with the first positive electrode sheet 41, the entire switch unit 22 is in the second position, the two battery cell groups are connected in parallel, and the entire battery pack 100 outputs the second voltage. When one end of the first movable switch 221a and the second movable switch 221b both move to the position of being in electrical contact with the middle electrode sheet 45, the entire switch unit 22 is in the first position, the two battery cell groups are connected in series, and the entire battery pack outputs the first voltage. Since the switching part 21 has two, the switching button 211 and the pressing rod 212 of this embodiment are also two. Figure 4 , Figure 5 and Figure 7 As shown, two switching buttons 211 and a pressure rod 212 are respectively provided corresponding to two active switches 221. In this embodiment, the two switching buttons 211 are independent of each other. When switching voltage, the two switching buttons 211 are triggered by external force, so that the two active switches 221 are both in the first position or the second position.

[0063] Furthermore, the active switch 221 of this embodiment is also configured with a third position, which is a position where both ends of the active switch 221 are neither in electrical contact with the positive and negative electrodes of the battery cell group nor in electrical contact with the middle electrode sheet 4, that is, when the pressure rod 212 is against the rotation center axis of the active switch 221, the active switch 221 does not deflect, which is the third position. When the active switch 221 is in the third position, the switch part 22 is disconnected from the battery module 3, and the output voltage of the battery module 3 is 0. This state can facilitate the transportation of the battery pack 100.

[0064] The housing 1 of this embodiment is provided with an opening 111, and the position of the opening 111 corresponds to the position of the switch button 211. The switch part 21 can be triggered through the opening 111. When the switch part 21 is triggered, the switch button 211 can be driven to operate by any tool through the opening 111. After the switch part 21 is triggered, the tool can be removed. When the switch part 21 drives the switch part 22 to move to the first or second position, an external electrical device such as an electric tool can be coupled with the battery pack 100 for use. When the battery pack 100 outputs a first voltage, an electric tool with a first rated voltage can be coupled with the battery pack 100 for use. When the battery pack 100 outputs a second voltage, an electric tool with a second rated voltage can be coupled with the battery pack 100 for use.

[0065] Of course, the switch button 211 can also be triggered by a dedicated trigger device. The present invention also provides an external trigger 5, which can be fixedly connected to external electrical equipment such as power tools. Of course, the external trigger 5 can also be an independent component or can be movably connected to the battery pack 100.

[0066] The external trigger 5 includes a first trigger 51 for causing the battery pack to output a first voltage and a second trigger 52 for causing the battery pack to output a second voltage. In the present embodiment, the first trigger 51 causes two battery cell groups in the battery pack 100 to be connected in series, and the second trigger 52 switches the two battery cell groups in the battery pack 100 to be connected in parallel. The first trigger 51 and the second trigger 52 are provided with a trigger protrusion capable of triggering the switching part 21 on one side facing the switching component 2, so as to trigger the series trigger part 2111 or the parallel trigger part 2112 of the switching part 21.

[0067] The direction from the interface 7 of the battery pack 100 to the direction away from the interface 7 is defined as direction A. To facilitate the use of an external trigger 5 to simultaneously drive the two switch buttons 211 to operate, the series trigger parts 2111 of the two switch buttons 211 of this embodiment are located on the same straight line along direction A.

[0068] The first trigger 51 is provided with a first series trigger protrusion 512 arranged along the A direction on one side facing the switching assembly 2. The position of the first series trigger protrusion 512 corresponds to the position of the series trigger portion 2111 of the switching button 211. At the same time, the first trigger 51 is provided with a first parallel trigger protrusion 511 at a position corresponding to the parallel trigger portion 2112 of the two switching buttons 211, so as to press the parallel trigger portion 2112 of the switching button 211 to make the switching button 211 rotate in the opposite direction, so that the first battery cell group and the second battery cell group are connected in parallel. The first series trigger protrusion 512 is arranged behind the first parallel trigger protrusion 511 along the A direction, that is, when the first trigger 51 is used to switch the battery group to the first voltage, the first parallel trigger protrusion 511 first contacts the switching button 211, and the two battery cell groups are in a parallel state, and then the first series trigger protrusion 512 contacts the switching button 211, so that the switching button 211 rotates in the opposite direction, so that the two battery cell groups are switched to a series state. Such an arrangement can first switch the battery pack 100 to a low voltage state, and will not output a high voltage instantaneously, which can reduce the probability of damage to external electrical equipment such as power tools. In addition, such an arrangement can enable the two battery cell groups of the battery pack 100 to be switched to a parallel state after the first trigger 51 is separated from the shell 1, so that the voltages of the two battery cell groups can tend to be balanced, avoiding overcharging or over-discharging of one of the battery cell groups, which is beneficial to extending the life of the battery pack 100.

[0069] In this embodiment, the first trigger 51 is provided with a first groove 513 at a position corresponding to the parallel trigger portion 2112 of the switch button 211 to avoid the parallel trigger portion 2112 of the switch button 211 and prevent the parallel trigger portion 2112 from interfering with the first trigger 51 .

[0070] When the first battery cell group and the second battery module need to be connected in parallel, the second trigger 52 is required to be used. The second trigger 52 is provided with a first parallel trigger protrusion 521 arranged along the A direction on one side facing the switching assembly 2. The position of the second parallel trigger protrusion 521 corresponds to the position of the parallel trigger portion 2112 of the switching button 211. When the trigger slides along the A direction, the second parallel trigger protrusion 521 presses down the parallel trigger portion 2112 of the switching button 211, forcing the switching button 211 to rotate. In order to trigger the switching switch 211 more stably, the second trigger 52 of this embodiment is provided with a second groove 522 at a position corresponding to the series trigger portion 2111 of the switching button 211, so as to avoid the series trigger portion 2111 of the switching button 211 and prevent the series trigger portion 2111 from interfering with the second trigger 52.

[0071] Preferably, the external trigger 5 of this embodiment is configured to be fixedly connected to an external electrical device such as an electric tool, the first trigger 51 is fixedly connected to an electric tool with a first rated voltage, and the second trigger 52 is fixedly connected to an electric tool with a second rated voltage, so that there is no need to trigger the switching component 2 in advance, and the electric tool is directly coupled to the battery pack. The battery pack will directly output the corresponding voltage under the action of the external trigger 5 on the electric tool, which is convenient to use. It should be noted that the external trigger 5 shown in the drawings is only for illustration, and the size and shape of the external trigger 5 are not limited by the drawings.

[0072] In this embodiment, the external trigger 5 is configured to be slidably connected to the housing 1, and the external trigger 5 can slide along the length direction of the battery pack 100 from the side away from the button 6 of the battery pack 100 until the external trigger 5 is connected and fixed to the housing 1. Preferably, one end of the external trigger 5 is provided with a locking portion 53 that can be adapted to the battery pack button 6. When the external trigger 5 slides until its locking portion 53 engages with the battery pack button 6, the external trigger 5 is locked on the housing 1, and the external trigger 5 completes the corresponding triggering action. The battery pack button 6 mentioned here (i.e., the button for locking the battery pack 100 and the power tool) is a common existing structure on the battery pack 100, so this structure will not be described in detail here. In this way, the power tool is locked with the battery pack 100 through the external trigger 5.

[0073] The present invention also provides an electric tool system, which includes a first electric tool having a first rated voltage, a second electric tool having a second rated voltage, and the above-mentioned battery pack 100 for providing energy to the first electric tool and the second electric tool. When the first electric tool is coupled to the interface of the battery pack 100, the battery pack 100 outputs a first voltage to supply the first electric tool. When the second electric tool is coupled to the interface 7 of the battery pack 100, the battery pack 100 outputs a second voltage to supply the second electric tool.

[0074] Embodiment 2

[0075] Combination Figures 11 to 15 As shown, the other structures of this embodiment are the same as those of the first embodiment, except that the structures of the intermediate connecting member 4' and the switching assembly 2' of this embodiment are different from those of the first embodiment. In this embodiment, the intermediate connecting member 4' includes a first positive electrode sheet 41', a first negative electrode sheet 42', a second positive electrode sheet 43', a second negative electrode sheet 44' and an intermediate electrode sheet 45'. Fig.11 and Fig.12As shown, the first negative electrode sheet 42' and the second negative electrode sheet 44' are arranged on the same side of the battery pack 100, and the first positive electrode sheet 41' and the second positive electrode sheet 43' are arranged together on the opposite side of the battery pack 100. At the same time, the intermediate electrode sheet 45' is located between the second negative electrode sheet 44' and the second positive electrode sheet 43', and the intermediate electrode sheet 45' is located between the first negative electrode sheet 42' and the second negative electrode sheet 44', and the end of the first negative electrode sheet 42' and the end of the second positive electrode sheet 43' are located on the same straight line along the A direction. Correspondingly, the switching assembly 2' of the present embodiment also includes two converters 20'. The structure of each converter 20' is the same as that of the converter 20 in the first embodiment, that is, the converter 20' also includes a switching part and a switch part. The switching part includes a switching button. The difference from the first embodiment is that the two switching buttons of the two converters 20' of the present embodiment are connected as one. The integrated structure forms the switching button 211' of the present embodiment. The switching button 211' can be rotatably positioned in the housing 1 through the rotating shaft 2113'. The two converters 20' of this embodiment also include a first active switch 221a', a second active switch 221b', a first switch fixing seat 222a', and a second switch fixing seat 222b'. The first switch fixing seat 222a' and the second switch fixing seat 222b' are located in a straight line along direction A. The first switch fixing seat 222'a is electrically contacted with the first negative electrode sheet 42', and the second switch fixing seat 222'b is electrically contacted with the second positive electrode sheet 43'.

[0076] Two pressure rods 212 ′ corresponding to the active switches 221 ′ are connected below the switch button 211 ′, and the series triggering portion 2111 ′ and the parallel triggering portion 2112 ′ are respectively located at two opposite sides of the switch button 211 ′.

[0077] Since this embodiment has a different arrangement of electrodes and a different switching component 2', this embodiment also has a different external trigger 5', such as Fig.14 and Fig.15As shown, the external trigger 5' also includes a first trigger 51' and a second trigger 52'. The first trigger 51' is provided with a first series trigger protrusion 512' arranged along the A direction on the side facing the switching component 2'. The position of the first series trigger protrusion 512' corresponds to the position of the series trigger portion 2111' of the switching button 211'. At the same time, the first trigger 51' is provided with a first parallel trigger protrusion 511' at a position corresponding to the parallel trigger portions 2112' of the two switching buttons 211', so as to press the parallel trigger portion 2112' of the switching button 211' to rotate the switching button 211' in the opposite direction, so that the two battery cell groups are connected in parallel. The first series trigger protrusion 512' is arranged behind the first parallel trigger protrusion 511' along the A direction, that is, when the first trigger 51' is used to switch the battery pack 100 to the first voltage, the first parallel trigger protrusion 511' first contacts the switch button 211', and the two battery cell groups are in a parallel state, and then the first series trigger protrusion 512' contacts the switch button 211', causing the switch button 211' to rotate in a direction, so that the two battery cell groups are switched to a series state. Similarly, the first trigger 51' of this embodiment is also provided with a first groove 513' for avoiding the parallel trigger part 2112' of the switch button 211'.

[0078] The second trigger 52' ​​of this embodiment is provided with a second parallel trigger protrusion 521' arranged along the A direction on one side facing the switching assembly 2', and the position of the second parallel trigger protrusion 521' corresponds to the position of the parallel trigger portion 2112' of the switching button 211'. When the second trigger 52' ​​slides along the A direction, the second parallel trigger protrusion 521' presses down the parallel trigger portion 2112' of the switching button 211', forcing the switching button 211' to rotate. In order to trigger the switching switch 211' more stably, the second trigger 52' ​​of this embodiment is provided with a second groove 522' at a position corresponding to the serial trigger portion 2111' of the switching button 211', so as to avoid the serial trigger portion 2111' of the switching button 211'.

[0079] In summary, the battery pack of the present invention outputs different voltages through a switching component for use with tools with different rated voltages. The switching component of the present invention has a simple structure and is easy to switch. The switching component can operate reliably and can enable the switch part to stably act on the battery module and ultimately maintain a stable position state, thereby ensuring the stability of the output voltage.

[0080] The above are only preferred embodiments of the invention and are not intended to limit the invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the invention should be included in the scope of protection of the invention.

Claims

1. An electric tool system, characterized in that: A first electric tool having a first rated voltage, a second electric tool having a second rated voltage, and a battery pack for providing energy to the first electric tool and the second electric tool, wherein the battery pack comprises a housing, a battery module, a switching assembly, and an interface for coupling with the first electric tool and the second electric tool, wherein the interface is electrically connected to the battery module to realize energy input and / or output, the switching assembly and the battery module are both accommodated in the housing, the battery module comprises a plurality of battery cell groups, the switching assembly is electrically connected to the battery module to switch the combination of the plurality of battery cell groups in the battery module to realize output voltage switching, the switching assembly switches the combination of the plurality of battery cell groups by rotating, when the first electric tool is coupled to the interface of the battery pack, the battery pack outputs a first voltage for supplying the first electric tool, and when the second electric tool is coupled to the interface of the battery pack, the battery pack outputs a second voltage for supplying the second electric tool; The power tool system also includes a first trigger electrically connected to the first power tool and a second trigger electrically connected to the second power tool, the first trigger and the second trigger both having a trigger protrusion capable of triggering a switching component, the switching component comprising a plurality of converters, the converter comprising a switching part capable of being mechanically triggered, the switching part comprising a switching button, a series trigger part and a parallel trigger part being respectively provided on two opposite sides of the switching button, the series trigger part and the parallel trigger part being respectively located on both sides of a rotation axis of the switching button, the first trigger being provided with a first groove corresponding to the parallel trigger part of the switching button, the second trigger being provided with a second groove corresponding to the series trigger part of the switching button, the first power tool and the second power tool respectively cause the battery pack to output a first voltage or a second voltage through the first trigger and the second trigger.

2. The electric tool system according to claim 1, characterized in that: The housing is provided with an opening corresponding to the switching assembly, and the triggering protrusions on the first trigger and the second trigger trigger the switching assembly through the opening.

3. The electric tool system according to claim 1, characterized in that: The converter is rotatably positioned within the housing.

4. The electric tool system according to claim 3, characterized in that: The converter further comprises a switch part driven by the switching part. The switching part rotates after being mechanically triggered and drives the switch part to move so as to switch the combination mode of the plurality of battery cell groups.

5. The electric tool system according to claim 4, characterized in that: The switch part also includes a pressure rod, the switch button is rotatably positioned in the shell, one end of the pressure rod is connected to the switch button and the pressure rod can float relative to the switch button, and the other end of the pressure rod is always pressed against the switch part.

6. The electric tool system according to claim 5, characterized in that: An elastic member is arranged between the pressure rod and the switch button so that the pressure rod is always in contact with the switch part.

7. The electric tool system according to claim 4 or 6, characterized in that: The switch part includes a switch fixing seat and a movable switch driven by the switching part, the movable switch is rotatably connected to the switch fixing seat, and the movable switch is configured with a first position for connecting the same polarity of multiple battery cell groups and a second position for connecting different polarities of multiple battery cell groups.

8. The electric tool system according to claim 7, characterized in that: The movable switch is in a seesaw shape, and convex bulges are arranged at two ends of the movable switch.

9. The electric tool system according to claim 1, characterized in that: It also includes an intermediate connector, each of the battery cell groups has a positive electrode and a negative electrode, the intermediate connector is electrically connected to the positive electrode and the negative electrode of each battery cell group, and the switching component switches the combination of multiple battery cell groups by rotating the electrical connection mode with the intermediate connector.

10. The electric tool system according to claim 7, characterized in that: The battery cell group includes a first battery cell group and a second battery cell group, and the first battery cell group and the second battery cell group have equal output voltages.

11. The electric tool system according to claim 10, characterized in that: The switching assembly includes two converters, the switch parts of the two converters are independent of each other, and the two switch fixing seats of the two switch parts are respectively electrically contacted with different electrodes of the first battery cell group and the second battery cell group, and the movable switch and the switch fixing seat are both made of conductive materials and electrical contact is maintained between the movable switch and the switch fixing seat.

12. The electric tool system according to claim 11, characterized in that: It also includes an intermediate connector, which includes a first positive electrode sheet and a first negative electrode sheet electrically connected to the positive electrode and negative electrode of the first battery pack unit respectively, and a second positive electrode sheet and a second negative electrode sheet electrically connected to the positive electrode and negative electrode of the second battery unit group respectively.

13. The electric tool system according to claim 12, characterized in that: One of the switch fixing bases is electrically connected to the first negative electrode sheet, and the other switch fixing base is electrically connected to the second positive electrode sheet.

14. The electric tool system according to claim 13, characterized in that: The intermediate connection member further includes an intermediate electrode sheet, and the switch unit connects the first battery cell group and the second battery cell group with different polarities through the intermediate electrode sheet so that the first battery cell group and the second battery cell group are connected in series.

15. The electric tool system according to claim 7, characterized in that: The movable switch is also configured with a third position. When the movable switch is located at the third position, the switch portion is disconnected from the battery module, and the output voltage of the battery module is 0.

16. The electric tool system according to claim 11, characterized in that: The two switching buttons of the two converters are independent of each other.

17. The electric tool system according to claim 11, characterized in that: The two switching buttons of the two converters are connected into one.

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