CN212113850U

CN212113850U - Battery pack and electric tool system with same

Info

Publication number: CN212113850U
Application number: CN202021261953.0U
Authority: CN
Inventors: 韦律
Original assignee: Globe Jiangsu Co Ltd
Current assignee: Globe Jiangsu Co Ltd
Priority date: 2020-07-02
Filing date: 2020-07-02
Publication date: 2020-12-08
Anticipated expiration: 2030-07-02

Abstract

The utility model provides a battery pack, including casing, battery module, switching module and be used for with the interface of outside electrical equipment coupling, the interface with battery module electric connection is in order to realize input and/or output of energy, switching module with battery module all accepts in the casing, battery module includes a plurality of battery cell groups, switching module with the battery module electricity is connected, just switching module switches the compound mode of a plurality of battery cell groups through rotating. The switching assembly of the battery pack is simple in structure, convenient to switch and reliable in action. The utility model discloses still provide and include battery package electric tool system.

Description

Battery pack and electric tool system with same

Technical Field

The utility model relates to a battery package technical field especially relates to a battery package and have electric tool system of this battery package.

Background

Battery packs are increasingly being used as rechargeable power sources for outdoor tools, especially cordless power tools, which usually have one rated operating voltage and different cordless power tools often have different rated operating voltages, and cordless power tools with different rated operating voltages need to be powered by battery packs with different output voltages, so that when an operator operates different cordless power tools outdoors, a plurality of battery packs with corresponding output voltages need to be carried. Since the battery pack generates a large load, it causes great inconvenience to an operator. In order to solve the problem, related technical personnel develop a battery pack capable of realizing dual-voltage switching, and the battery pack can change the series-parallel connection mode of battery modules in the battery pack so as to output two voltages, thereby being suitable for two cordless electric tools with different rated voltages. The battery pack capable of realizing double-voltage switching greatly improves the convenience of operation, but the existing battery pack capable of realizing double-voltage switching is complex in structure and high in production and manufacturing cost.

In view of the above, it is desirable to provide a battery pack with a simple structure and capable of switching voltage to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a can realize the battery package of two kinds of voltage switching and have the electric tool system of this battery package, the simple structure of this battery package, voltage switching is convenient, and this battery package is favorable to stabilizing output voltage, and simultaneously, the structure of this battery package has reduced the mechanical fit tolerance requirement between to battery package and the electric tool.

Specifically, the utility model discloses a realize through following technical scheme: the utility model provides a battery pack, includes casing, battery module, switching component and is used for the interface with the coupling of external electrical equipment, the interface with battery module electric connection is in order to realize input and/or output of energy, switching component with battery module all accepts in the casing, battery module includes a plurality of battery cell groups, switching component with battery module electric connection realizes output voltage's switching with the compound mode of switching a plurality of battery cell groups in the battery module, switching component switches the compound mode of a plurality of battery cell groups through rotating.

As a further improvement of the present invention, the switching assembly includes a plurality of converters rotatably positioned within the housing.

As a further improvement of the present invention, the converter includes a switching portion that can be triggered mechanically and a switch portion that is driven by the switching portion, the switching portion receives the combination mode that the rotation takes place after mechanical trigger and drives the switch portion to move in order to switch a plurality of battery cell groups.

As a further improvement, the switching part comprises a switching button and a pressure rod, the switching button is rotationally positioned in the shell, one end of the pressure rod is connected to the switching button, the pressure rod can float relative to the switching button, and the other end of the pressure rod is always abutted to the switching part.

As a further improvement of the present invention, an elastic member is provided between the pressing rod and the switching button, so that the pressing rod is always abutted against the switch portion.

As a further improvement of the utility model, the switch portion includes the switch fixing base and by switching part driven movable switch, movable switch rotate connect in the switch fixing base, movable switch disposes the first position that carries out the same polarity of a plurality of battery cell groups and carries out the second position of connecting the different polarity of a plurality of battery cell groups.

As a further improvement of the present invention, the movable switch is in the shape of a seesaw, and the two ends of the movable switch are provided with convex hulls.

As a further improvement of the present invention, the battery pack further includes an intermediate connecting member, each of the battery cell groups has a positive electrode and a negative electrode, the intermediate connecting member is connected to each of the positive electrodes and the negative electrodes of the battery cell groups, and the switching member switches the combination of the plurality of battery cell groups by rotating the switching member to be electrically connected to the intermediate connecting member.

As a further improvement of the present invention, the battery cell line includes a first battery cell line and a second battery cell line, and the output voltage of the first battery cell line and the output voltage of the second battery cell line are equal.

As a further improvement of the utility model, the switching component includes two converters, two the switch portion mutual independence of converter, two switch fixing bases of switch portion make and keep the electrical contact between activity switch and the switch fixing base by the material that can electrically conduct with the dissimilar electrode electrical contact of first battery cell group, second battery cell group respectively, activity switch and switch fixing base.

As a further improvement of the utility model, this battery pack still includes the intermediate junction spare, the intermediate junction spare includes first positive electrode piece, the first negative electrode piece that is connected with the positive electrode of first battery unit and negative electrode electricity respectively and second positive electrode piece, the second negative electrode piece that are connected with the positive electrode of second battery unit group and negative electrode electricity respectively.

As a further improvement of the present invention, one of them the switch fixing base is electrically connected to the first negative electrode plate, and the other is electrically connected to the switch fixing base and the second positive electrode plate.

As a further improvement, the intermediate junction piece further includes an intermediate electrode plate, the switch portion connects the different polarities of the first cell unit group and the second cell unit group through the intermediate electrode plate so as to realize the series connection of the first cell unit group and the second cell unit group.

As a further improvement of the utility model, the double-phase opposite side of switching button is equipped with series connection trigger part and parallelly connected trigger part respectively, series connection trigger part and parallelly connected trigger part are located the both sides of switching button rotation axis respectively.

As a further improvement, the movable switch is further provided with a third position, when the movable switch is located the third position, the switch part with the battery module disconnection, the battery module output voltage is 0.

As a further improvement of the present invention, two of the two switching buttons of the converter are independent of each other.

As a further improvement of the present invention, two of the two switching buttons of the converter are connected into a whole.

The utility model discloses an electric tool system, including the first electric tool that has first rated voltage, the second electric tool that has the second rated voltage and be used for providing the battery package of energy to first electric tool, second electric tool, the battery package includes casing, battery module, switching component and interface, the interface with battery module electric connection is in order to realize the input and/or output of energy, switching component with battery module all is acceptd in the casing, battery module includes a plurality of battery cell group, switching component with battery module electricity is connected, switching component switches the compound mode of a plurality of battery cell group through rotating, when first electric tool couples with the interface of battery package, the first voltage that battery package output supplied to first electric tool, when the second electric tool couples with the interface of battery package, the battery pack outputs a second voltage that is supplied to a second power tool.

As a further improvement of the present invention, the electric tool system further includes a first trigger electrically connected to the first electric tool and a second trigger electrically connected to the second electric tool, the first trigger and the second trigger each have a trigger protrusion capable of triggering the switching component, and the first electric tool and the second electric tool respectively output the first voltage or the second voltage through the first trigger and the second trigger.

As a further improvement, the casing is provided with an opening corresponding to the switching assembly, and the triggering protrusion on the first trigger and the second trigger passes through the opening triggers the switching assembly.

The utility model has the advantages that: the utility model discloses a battery package makes the voltage of two kinds of differences of battery package output through the switching module, has realized the switching of dual voltage, just the utility model discloses a battery package's simple structure switches convenient and fast, simultaneously, the utility model discloses a switching module action is reliable, can make switch portion stably act on battery module and finally maintain stable position state, has guaranteed output voltage's stability.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.

Drawings

Fig. 1 is a schematic view of the overall structure of the battery pack of the present invention;

fig. 2 is an exploded view of the battery pack of the present invention;

fig. 3 is a schematic view of the internal structure of the battery pack of the present invention;

fig. 4 is a schematic front view of a converter according to the present invention;

fig. 5 is an exploded view of the switching part according to the present invention; .

Fig. 6 is a schematic view of an arrangement structure of a battery module and an intermediate connecting member according to a first embodiment of the present invention;

fig. 7 is a schematic view illustrating a connection relationship between a switching assembly and an intermediate connecting member according to a first embodiment of the present invention;

fig. 8 is a schematic overall structure diagram of a switching assembly according to a first embodiment of the present invention;

fig. 9 is a perspective view of a first trigger according to a first embodiment of the present invention;

fig. 10 is a perspective view of a second trigger according to a first embodiment of the present invention;

fig. 11 is a schematic view of an arrangement structure of a battery module and an intermediate connecting member according to a second embodiment of the present invention;

fig. 12 is a connection relationship diagram of the switching assembly and the intermediate connecting member according to the second embodiment of the present invention;

fig. 13 is a schematic overall structure diagram of a switching assembly according to a second embodiment of the present invention;

fig. 14 is a perspective view of a first trigger according to a second embodiment of the present invention;

fig. 15 is a perspective view of a second trigger according to a second embodiment of the present invention.

Fig. 16 is a schematic view of the overall structure of the battery pack of the present invention when connected to an external trigger.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the drawings of the present invention are combined to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. As used herein, the word "comprising" and similar words are intended to mean that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items.

Example one

Referring to fig. 1 to 10, the present invention provides a battery pack 100, the battery pack 100 includes a housing 1, a switch assembly 2, a battery module 3 and an interface 7 for coupling with an external electrical device, a cavity (not labeled in the figure) is disposed in the housing 1, and the switch assembly 2 and the battery module 3 are disposed in the cavity of the housing 1. Preferably, the case 1 of the present embodiment includes an upper case 11 and a lower case 12, and the upper case 11 and the lower case 12 form the above-described accommodation chamber for accommodating the battery module 3 and the switching member 2. The interface 7 is electrically connected to the battery module 3 to realize energy input and/or output, the interface 7 may be a plug terminal or other structure capable of being coupled to 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.

In this embodiment, the battery module 3 includes a plurality of battery cell groups, each battery cell group is formed by connecting a plurality of battery cell monomers in series or in parallel, the output voltages of each battery cell group are equal, and it is defined that the output voltage of each battery cell group is nV.

The switching component 2 is electrically connected with the battery module 3 to switch the output voltage by switching the combination of a plurality of battery cell groups in the battery module 3, the switching component 2 can be directly electrically connected with the battery module 3, for example, the switching component 2 has a setting pin, the pins of the switch module are electrically connected with the battery module 3, and the switch module 2 is directly and electrically connected with the battery module 3, of course, the switching component 2 can also be electrically connected to the battery module 3 through the intermediate connecting component 4, as shown in fig. 3 to 7, each battery cell group in the battery module 3 has a positive electrode and a negative electrode, the intermediate connecting component 4 is electrically connected to the positive electrode and the negative electrode of each battery cell group, the switching component 2 is electrically connected to the battery module 3, and the switching component 2 switches the combination manner of the plurality of battery cell groups by rotating to switch the electrical connection manner with the intermediate connecting component 4. In this embodiment, the switching assembly 2 is preferably electrically connected to the battery module 3 through the intermediate connecting member 4.

It should be noted that the switching assembly 2 of the present embodiment switches the combination of the plurality of cell groups by rotating. In this embodiment, the combination of the plurality of battery cell groups refers to a series-parallel connection between the plurality of battery cell groups, and the change of the plurality of battery cell groups from the series connection to the parallel connection is a change of the combination. The switching member 2 is rotated from one position to another position to change the series-parallel connection of the plurality of cell groups, so that the battery pack 100 outputs different voltages.

The switching assembly 2 of the present embodiment includes a plurality of switches 20, the switches 20 are rotatably positioned in the housing 1, the number of the switches 20 is adapted to the number of the battery cell groups, generally speaking, two switches 20 are provided if there are two battery cell groups, three switches 20 are provided if there are three battery cell groups, the battery pack 100 is provided with different numbers of battery cell groups, and the specific structure of the switches 20 is not affected by the number of the switches 20, and the structure of the switches 20 is not changed.

As shown in fig. 4, the converter 20 of the present embodiment includes a switching portion 21 capable of being mechanically triggered and a switch portion 22 driven by the switching portion 21, and the switching portion 21 is mechanically triggered to rotate and drive the switch portion 22 to move so as to switch the combination of the plurality of cell groups.

More specifically, the switching portion 21 includes a switching button 211 and a pressing lever 212, the switching button 211 is rotatably positioned in the housing 1 by a rotating shaft 2113 or the like, the switching button 211 is rotatably connected to the upper housing 11 by the rotating shaft 2113, and is also rotatably connected to a button fixing base 23 by the rotating shaft 2113, and the button fixing base 23 is mountable above the battery module 3. One end of the pressing rod 212 is connected to the switch button 211, and the pressing rod 212 can float relative to the switch button 211, and the other end of the pressing rod 212 always abuts against the switch portion 22. In the present embodiment, an elastic member 213 is provided between the pressing lever 212 and the switch button 211 so that the pressing lever 212 is always in contact with the switch unit 22. In this embodiment, the elastic member 213 is preferably a spring, the bottom of the switch button 211 is provided with a cavity (not shown) for accommodating the press rod 212, the top of the press rod 212 is provided with a cavity for accommodating the spring, 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 press rod 212, and two ends of the spring are respectively connected to the switch button 211 and the press rod 212.

The switch portion 22 includes a switch fixing base 222 and a movable switch 221 driven by the switching portion 21, the movable switch 221 is rotatably connected to the switch fixing base 222, and in the present embodiment, the rotation axis of the switching button 211 and the rotation axis of the movable switch 221 are located in the same or two parallel planes. The switching assembly 2 is electrically connected to the intermediate connecting member 4 through the switch portion 22, the movable switch 221 and the switch fixing base 222 of the present embodiment are both made of a conductive material, such as a metal material, and the movable switch 221 and the switch fixing base 222 are electrically contacted with each other, and the switch fixing base 222 is electrically connected to the intermediate connecting member 4, so that the switching assembly 2 is electrically connected to the intermediate connecting member 4. Preferably, the movable switch 221 of the present embodiment has a seesaw shape, and when one end of the movable switch 221 moves downward under the action of the switching portion 21, the other end thereof tilts upward. More preferably, the movable switch 221 of the present embodiment is provided with the convex hulls 2211 at both ends, and the arrangement of the convex hulls 2211 can make the electric contact between the movable switch 221 and the battery module 3 more stable. In addition, the bottom end of the pressing rod 212 of the present embodiment is arc-shaped, so as to ensure that the pressing rod 212 can tightly abut against the movable switch 212 and smoothly drive the movable switch 212 to rotate.

The movable switch 221 is configured with a first position at which the different polarities of the plurality of cell groups are connected and a second position at which the same polarity of the plurality of cell groups is connected. When the movable switch 221 is located at the first position, the plurality of battery cell groups are connected in series, the battery pack outputs a first voltage, and when the movable switch 221 is switched to the second position, the plurality of battery cell groups are connected in parallel, and the battery pack outputs a second voltage.

Further, the switch button 211 of the present embodiment is provided with a series trigger portion 2111 and a parallel trigger portion 2112, the series trigger portion 2111 and the parallel trigger portion 2112 are disposed at two opposite sides of the switch button 211, the series trigger portion 2111 and the parallel trigger portion 2112 are respectively located at two sides of a 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, the movable switch 221 is driven and rotates to the first position, the plurality of battery cell groups are connected in series, when the external force acts on the parallel trigger portion 2112 of the switch button 211, the switch button 211 rotates in reverse direction, the movable switch 221 is driven and rotates in reverse direction to the second position, and the plurality of battery cell groups are connected in parallel. As can be seen from the mechanics principle, when the movable switch 221 is driven by the switching unit 21 to rotate to a certain position, the switching unit 21 reaches the dead point position, at this time, the switching unit 21 is locked at the position if no external force is applied, the movable switch 221 is locked at the position, and the dead point position is set as the first position, and similarly, when the switching unit 21 rotates in the opposite direction, the dead point position also reaches one dead point position, and the position is set as the second position. Therefore, when the movable switch 221 is locked after moving to the first position and the second position, the movable switch 221 is still maintained at the first position or the second position even if no external force is applied. At this time, when a slight acting force such as a vibration generated by a slight acting force acts on the switching portion 21, since the elastic member 213 is disposed between the pressing rod 212 and the switching button 211, the pressing rod 212 still presses the movable switch 221 all the time, the movable switch 221 is firmly locked at the first position or the second position, no relative displacement is generated between the movable switch 221 and the battery module 3, no abrasion is generated between the movable switch 221 and the battery module 3, the vibration generated by an external electric device such as an external electric tool does not affect the entire switching assembly 2 during actual use, the voltage output of the entire battery pack 100 is stable and reliable, and the movable switch 221 is maintained at the first position or the second position even if the external force acting on the switching portion 21 is cancelled after the movable switch 211 is locked at the first position or the second position, therefore, the structure of the present embodiment can reduce the mechanical impact between the battery pack 100 and the external electric device such as an electric tool The tolerance requirement is matched, and the production and the manufacture are convenient.

Defining that the battery module 3 of the present embodiment includes m battery cell groups, m is an integer greater than or equal to two, when the movable switch 221 is located at the first position, the plurality of battery cell groups are sequentially connected in series, so that the output voltage of the battery module 3 is mnV, which is the first voltage; when the movable switch 221 is located at the second position, the plurality of 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.

The battery cell group can be regarded as the single division of several electric core in the battery pack 100 in fact, that is, all the electric core monomers in the battery pack 100 are divided into a plurality of modules with the same quantity, and these modules are the above battery cell group, therefore, in practical sense, the effect achieved by arranging two battery cell groups or arranging three battery cell groups or arranging more battery cell groups in the battery pack is consistent, and the difference lies in that the number of the modules divided into several electric core monomers is inconsistent and the output voltage of each module (namely each battery cell group) is inconsistent.

Because set up two battery cell groups in the battery package 100 or set up three battery cell group or set up the actual effect that more battery cell groups reached and be unanimous, consequently, the utility model discloses preferentially fall into two battery cell groups with battery module 3, set up two battery cell group comparisons and accord with reality. In order to better explain the operation principle of the present battery pack 100, the following description will be made on the specific operation principle of the battery pack 100 in conjunction with the structure in which the battery module 3 includes two battery cell groups.

When the switch unit 22 is located at the second position, the positive electrodes of the two battery cell groups are connected, the negative electrodes of the two battery cell groups are connected by the switch unit 22 to realize the parallel connection of the two battery cell groups, and when the switch unit 22 is located at the first position, the different electrodes of the two battery cell groups are connected by the switch unit 22 to realize the series connection of the two battery cell groups.

The two cell lines are respectively defined as a first cell line (not shown) and a second cell line (not shown), and the output voltages of the first cell line and the second cell line are equal. Correspondingly, the two converters 20 are also provided, and the two converters 20 include two switching units 21 and two switching units 22.

Each of the first and second battery cell lines has positive and negative electrodes for realizing energy output, and the positive electrode of the first battery cell line is defined as a first positive electrode a +, the negative electrode of the first battery cell line is defined as a first negative electrode a-, the positive electrode of the second battery cell line is defined as a second positive electrode B +, and the negative electrode of the second battery cell line is defined as a second negative electrode B-. The above-described intermediate connection member 4 includes a plurality of electrode tabs electrically connected to the two cell groups, i.e., a first positive electrode tab 41 electrically connected to the first positive electrode a +, a first negative electrode tab 42 electrically connected to the first negative electrode a +, a second positive electrode tab 43 electrically connected to the second positive electrode B +, and a second negative electrode tab 44 electrically connected to the second negative electrode B-. In this embodiment, the intermediate connector 4 further includes an intermediate electrode plate 45, and when the switch portion 22 is located at the first position, the switch portion 22 connects two different electrodes of the two battery cell groups through the intermediate electrode plate 45 to realize the series connection of the two battery cell groups. Of course, the intermediate connector 4 of the present embodiment may further include a circuit board 46, and the electrode pads may be disposed on the circuit board 46, where the circuit board 46 is a prior art and will not be described herein again.

The utility model discloses an in the battery package, the mode of arranging of a plurality of electrode slices of intermediate junction spare 4 can have the multiple, as an optimal solution, as shown in fig. 3, fig. 6 and fig. 7, the first negative electrode piece 42 and the setting of second negative electrode piece 44 of this embodiment are in the same one side of battery package, first positive electrode piece 41 and second positive electrode piece 43 together set up on the relative one side of battery package, and simultaneously, middle electrode slice 45 sets up in the intermediate position, is located between two different electrode slices of two battery cell groups.

The movable switch 221 and the switch holder 222 are made of a material capable of conducting electricity, such as a metal material, and an electrical contact is maintained between the movable switch 221 and the switch holder 222. Two switch portions 22 of this embodiment are independent each other, and two switch portions 22 include two movable switch 221 and two mutually independent switch fixing bases 222, and two movable switch 221 correspond respectively to set up on two switch fixing bases 222 with the switch fixing base 222 electrical contact that corresponds separately, and two switch fixing bases 222 are connected with two battery cell group's different electrodes electricity respectively, are two switch fixing bases 222 and the corresponding electrode slice electrical contact of intermediate junction spare 4 promptly in this embodiment. When the switch portion 22 is located at the first position, one end of each of the two movable switches 221 is in electrical contact with the middle electrode sheet 45. For convenience of illustration, the two switch holders 222 are defined as a first switch holder 222a and a second switch holder 222b, respectively, the first switch holder 222a is in electrical contact with the second positive electrode tab 43, and the second switch holder 222b is in electrical contact with the first negative electrode tab 42, so that the two movable switches 221 are in electrical contact with the first negative electrode tab 42 and the second positive electrode tab 43, respectively. The two movable switches 221 are defined as a first movable switch 221a and a second movable switch 221b, respectively, and when one end of the first movable switch 221a moves to a position of electrical contact with the second negative electrode tab 44 and the second movable switch 221b moves to a position of electrical contact with the first positive electrode tab 41, the entire switch section 22 is in the second position, the two cell groups are connected in parallel, and the entire battery pack 100 outputs the second voltage. When one end of each of the first movable switch 221a and the second movable switch 221b moves to a position where it is electrically contacted with the middle electrode sheet 45, the entire switch part 22 is in the first position, the two cell groups are connected in series, and the entire battery pack outputs the first voltage. Since the switching portion 21 has two, the switching button 211 and the pressing lever 212 of the present embodiment also have two, and as shown in fig. 4, 5, and 7, the two switching buttons 211 and the pressing lever 212 are provided corresponding to the two movable switches 221, respectively. In the present embodiment, the two switching buttons 211 are independent of each other. When the voltage is switched, the two switching buttons 211 are triggered by an external force, so that the two movable switches 221 reach the first position or the second position.

Furthermore, the movable switch 221 of the present embodiment is further configured with a third position, which is a position when both ends of the movable switch 221 are not in electrical contact with the positive and negative electrodes of the battery cell group, or the middle electrode plate 4, that is, when the pressing rod 212 is pressed against the rotation central axis of the movable switch 221, the movable switch 221 does not deflect, which is the third position. When the movable switch 221 is located at the third position, the switch portion 22 is disconnected from the battery module 3, and the output voltage of the battery module 3 is 0, which can facilitate transportation of the battery pack 100.

The housing 1 of the present embodiment is provided with an opening 111, the position of the opening 111 corresponds to the position of the switch button 211, the switch unit 21 can be activated through the opening 111, when the switch unit 21 is activated, the switch button 211 can be driven through the opening 111 by an arbitrary tool, and after the switch unit 21 is activated, the tool can be removed. When the switch unit 21 drives the switch unit 22 to move to the first or second position, an external electrical device such as a power tool can be coupled to the battery pack 100. When the battery pack 100 outputs a first voltage, a power tool having a first rated voltage may be coupled to the battery pack 100 for use, and when the battery pack 100 outputs a second voltage, a power tool having a second rated voltage may be coupled to the battery pack 100 for use.

Of course, the switch button 211 can also be triggered by a dedicated trigger device, and the present invention further provides an external trigger 5, wherein the external trigger 5 can be fixedly connected to an external electrical device such as a power tool, and of course, the external trigger 5 can also be an independent component or can be movably connected to the battery pack 100.

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 this embodiment, the first trigger 51 causes two battery cell groups in the battery pack 100 to be connected in series, the second trigger 52 switches the two battery cell groups in the battery pack 100 to be connected in parallel, and a trigger protrusion capable of triggering the switching portion 21 is provided on one side of the first trigger 51 and the second trigger 52 facing the switching assembly 2 to trigger the series trigger portion 2111 or the parallel trigger portion 2112 of the switching portion 21.

Defining the direction from the interface 7 of the battery pack 100 to the direction away from the interface 7 as the direction a, in order to facilitate the use of the external trigger 5 to simultaneously drive the two switch buttons 211, the serial trigger portions 2111 of the two switch buttons 211 of the present embodiment are located on the same straight line along the direction a.

A first serial trigger protrusion 512 is disposed along the direction a on one surface of the first trigger 51 facing the switching component 2, the position of the first serial trigger protrusion 512 corresponds to the position of the serial trigger portion 2111 of the switching button 211, and meanwhile, the first trigger 51 is disposed with a first parallel trigger protrusion 511 at the 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, so that the switching button 211 rotates in the opposite direction, and the first battery cell group and the second battery cell group are connected in parallel. The first series triggering protrusion 512 is disposed behind the first parallel triggering protrusion 511 along the direction a, that is, when the first trigger 51 is used to switch the battery pack to the first voltage, first the first parallel triggering protrusion 511 contacts the switching button 211 first, and two battery cell groups are in a parallel state, and then the first series triggering protrusion 512 contacts the switching button 211, so that the switching button 211 rotates in the opposite direction, and the two battery cell groups are switched to the series state. So set up and to switch into the low-voltage state at first with battery package 100, can not export high voltage in the twinkling of an eye, can reduce the probability that external electrical equipment such as electric tool damaged, and, so set up and to make after first trigger 51 separates with casing 1, two battery cell groups of battery package 100 are switched to the parallel state, can make the voltage of two battery cell groups tend to balanced, avoid one of them battery cell group to appear the situation of overcharging or overdischarging, be favorable to prolonging battery package 100's life-span.

The first trigger 51 of the present embodiment is provided with a first channel 513 at a position corresponding to the parallel triggering portion 2112 of the switch button 211 to avoid the parallel triggering portion 2112 of the switch button 211 and avoid the interference of the parallel triggering portion 2112 with the first trigger 51.

When the first battery cell group and the second battery cell group need to be connected in parallel, the second trigger 52 needs to be used, one surface of the second trigger 52 facing the switching assembly 2 is provided with a first parallel trigger protrusion 521 arranged along the direction a, 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 trigger slides in the direction a, the second parallel trigger protrusion 521 presses the parallel trigger portion 2112 of the switch button 211 downward, forcing the switch button 211 to rotate. In order to more stably activate the switch 211, the second trigger 52 of the present embodiment is provided with a second slot 522 at a position corresponding to the serial trigger portion 2111 of the switch button 211 to avoid the serial trigger portion 2111 of the switch button 211 and prevent the serial trigger portion 2111 from interfering with the second trigger 52.

Preferably, the external trigger 5 of the present embodiment is fixedly connected to an external electrical device such as an electric tool, the first trigger 51 is fixedly connected to the electric tool having the first rated voltage, and the second trigger 52 is fixedly connected to the electric tool having the second rated voltage, so that the switching module 2 does not need to be triggered in advance, the electric tool is directly coupled to the battery pack, and the battery pack directly outputs a 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 merely for illustrative purposes, and the size and shape of the external trigger 5 are not limited by the drawings.

In the present 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 fixedly connected to the housing 1. Preferably, one end of the external trigger 5 is provided with a locking part 53 capable of fitting with the battery pack button 6, when the external trigger 5 slides to the state that the locking part 53 is engaged 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 (i.e., the button for locking the battery pack 100 and the power tool) is a conventional structure of the battery pack 100, and thus the structure will not be described in detail herein. So configured, the power tool is locked with the battery pack 100 by the external trigger 5.

The utility model also provides an electric tool system, this electric tool system including the first electric tool that has first rated voltage, the second electric tool that has second rated voltage and be used for to first electric tool, the above-mentioned battery package 100 that the second electric tool provided energy, when first electric tool couples with the interface of battery package 100, the first voltage of first electric tool is supplied with in the output of battery package 100, when the second electric tool couples with interface 7 of battery package 100, the second voltage of second electric tool is supplied with in the output of battery package 100.

Example two

Referring to fig. 11 to 15, other structures of the present embodiment are the same as the first embodiment, except that the structures of the intermediate connecting member 4 'and the switching assembly 2' of the present embodiment are different from the first embodiment. In the present embodiment, the intermediate connector 4 'includes a first positive electrode tab 41', a first negative electrode tab 42 ', a second positive electrode tab 43', a second negative electrode tab 44 ', and an intermediate electrode tab 45'. As shown in fig. 11 and 12, the first negative electrode tab 42 'and the second negative electrode tab 44' are disposed on the same side of the battery pack 100, the first positive electrode tab 41 'and the second positive electrode tab 43' are disposed together on the opposite side of the battery pack 100, and the intermediate electrode tab 45 'is disposed between the second negative electrode tab 44' and the second positive electrode tab 43 ', and the intermediate electrode tab 45' is disposed between the first negative electrode tab 42 'and the second negative electrode tab 44', and the end of the first negative electrode tab 42 'and the end of the second positive electrode tab 43' are disposed on the same straight line along the a direction. Correspondingly, the switching assembly 2 'of the present embodiment also includes two converters 20', and the structure of each converter 20 'is the same as the structure of the converter 20 in the first embodiment, that is, the converter 20' also includes a switching portion and a switch portion, and the switching portion includes a switching button, unlike the first embodiment, the two switching buttons of the two converters 20 'of the present embodiment are connected into a whole, the whole structure forms the switching button 211' of the present embodiment, and the switching button 211 'is rotatably positioned in the housing 1 through the rotating shaft 2113'. The two converters 20 ' of this embodiment also include a first movable switch 221a ', a second movable switch 221b ', a first switch fixing seat 222a ', and a second switch fixing seat 222b ', wherein the first switch fixing seat 222a ' and the second switch fixing seat 222b ' are located on a straight line along the 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 '.

Two pressure levers 212 'corresponding to the movable switch 221' are connected below the switching button 211 ', and the serial triggering portion 2111' and the parallel triggering portion 2112 'are respectively located at two opposite sides of the switching button 211'.

Since the present embodiment has different electrode sheet arrangements and different switching assemblies 2 ', the present embodiment also has different external triggers 5', as shown in fig. 14 and 15, the external trigger 5 'also includes a first trigger 51' and a second trigger 52 ', one side of the first trigger 51' facing the switching assembly 2 'is provided with a first serial trigger protrusion 512' arranged along the direction a, the position of the first serial trigger protrusion 512 'corresponds to the position of the serial trigger portion 2111' of the switching button 211 ', meanwhile, the first trigger 51' is provided with a first parallel trigger protrusion 511 'at the position corresponding to the parallel trigger portions 2112' of the two switching buttons 211 ', so as to press down the parallel trigger portion 2112' of the switching button 211 ', so as to rotate the switching button 211' in the opposite direction, and thus connect the two battery cell sets in parallel. The first series triggering protrusion 512 'is disposed behind the first parallel triggering protrusion 511' along the direction a, so that when the first trigger 51 'is used to switch the battery pack 100 to the first voltage, the first parallel triggering protrusion 511' first contacts the switch button 211 ', the two battery cell sets are in a parallel connection state, and then the first series triggering protrusion 512' contacts the switch button 211 ', so that the switch button 211' rotates to switch the two battery cell sets to a series connection state. Similarly, the first trigger 51 'of the present embodiment is also provided with a first groove 513' for avoiding the parallel trigger 2112 'of the switch button 211'.

The second trigger 52 'of the present embodiment is provided with a second parallel trigger protrusion 521' disposed along the direction a on a surface 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 in the direction A, the second parallel trigger protrusion 521 ' presses the parallel trigger portion 2112 ' of the switch button 211 ' downwards, so as to force the switch button 211 ' to rotate. In order to more stably trigger the switching button 211 ', the second trigger 52 ' of the present embodiment is provided with a second groove 522 ' at a position corresponding to the serial trigger portion 2111 ' of the switching button 211 ' to avoid the serial trigger portion 2111 ' of the switching button 211 '.

To sum up, the utility model discloses a battery package is through the different voltage of switching module output in order to supply the instrument that has different rated voltage to use, the utility model discloses a switching module simple structure, it is convenient to switch, and this switching module action is reliable, can make switching part stable action in battery module and finally maintain stable position state, has guaranteed output voltage's stability.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements and the like made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A battery pack comprises a shell, a battery module, a switching component and an interface used for being coupled with external electrical equipment, wherein the interface is electrically connected with the battery module to realize energy input and/or output, the switching component and the battery module are accommodated in the shell, the battery module comprises a plurality of battery cell groups, the switching component is electrically connected with the battery module to realize switching of output voltage in a combined mode of switching the plurality of battery cell groups in the battery module, and the battery pack is characterized in that: the switching assembly switches the combination of the plurality of cell groups by rotating.

2. The battery pack according to claim 1, wherein: the switching assembly includes a plurality of switches rotatably positioned within the housing.

3. The battery pack according to claim 2, wherein: the converter comprises a switching part capable of being mechanically triggered and a switching part driven by the switching part, wherein the switching part rotates after being mechanically triggered and drives the switching part to move so as to switch the combination mode of the plurality of battery cell groups.

4. A battery pack according to claim 3, wherein: the switching part comprises a switching button and a pressing rod, the switching button is rotatably positioned in the shell, one end of the pressing rod is connected to the switching button, the pressing rod can float relative to the switching button, and the other end of the pressing rod is always abutted against the switching part.

5. The battery pack according to claim 4, wherein: an elastic piece is arranged between the pressure lever and the switching button so that the pressure lever is always abutted against the switch part.

6. The battery pack according to claim 3 or 5, wherein: the switch portion includes the switch fixing base and by the movable switch of switching portion driven, movable switch rotate connect in the switch fixing base, movable switch disposes the first position that connects a plurality of battery cell group's the same polarity and the second position that connects a plurality of battery cell group's different polarity.

7. The battery pack according to claim 6, wherein: the movable switch is in a rocker shape, and convex hulls are arranged at two ends of the movable switch.

8. The battery pack according to claim 1, wherein: the battery pack switching device comprises a plurality of battery cell groups, and is characterized by further comprising intermediate connecting pieces, wherein each battery cell group is provided with a positive electrode and a negative electrode, the intermediate connecting pieces are electrically connected with the positive electrode and the negative electrode of each battery cell group, and the switching assembly switches the combination mode of the plurality of battery cell groups by switching the electrical connection mode with the intermediate connecting pieces in a rotating mode.

9. The battery pack according to claim 6, wherein: the battery cell line includes a first battery cell line and a second battery cell line, and output voltages of the first battery cell line and the second battery cell line are equal.

10. The battery pack according to claim 9, wherein: the switching component comprises two converters, wherein the switch parts of the converters are mutually independent, the two switch fixing seats of the switch parts are respectively in electric contact with different electrodes of the first battery cell group and the second battery cell group, the movable switch and the switch fixing seats are made of conductive materials, and the movable switch and the switch fixing seats are kept in electric contact.

11. The battery pack according to claim 10, wherein: the battery pack further comprises an intermediate connecting piece, wherein the intermediate connecting piece comprises a first positive electrode piece and a first negative electrode piece which are respectively and electrically connected with the positive electrode and the negative electrode of the first battery pack unit, and a second positive electrode piece and a second negative electrode piece which are respectively and electrically connected with the positive electrode and the negative electrode of the second battery pack unit.

12. The battery pack according to claim 11, wherein: one of the switch fixing seats is electrically connected with the first negative electrode plate, and the other switch fixing seat is electrically connected with the second positive electrode plate.

13. The battery pack according to claim 12, wherein: the middle connecting piece further comprises a middle electrode plate, and the switching part connects the different polarities of the first battery cell group and the second battery cell group through the middle electrode plate so as to enable the first battery cell group and the second battery cell group to be connected in series.

14. The battery pack according to claim 4, wherein: and the two opposite sides of the switching button are respectively provided with a series triggering part and a parallel triggering part, and the series triggering part and the parallel triggering part are respectively positioned at two sides of the rotation axis of the switching button.

15. The battery pack according to claim 6, wherein: the movable switch is also provided with a third position, when the movable switch is positioned at the third position, the switch part is disconnected with the battery module, and the output voltage of the battery module is 0.

16. The battery pack according to claim 10, wherein: the two switching buttons of the two converters are independent of each other.

17. The battery pack according to claim 10, wherein: the two switching buttons of the two converters are connected into a whole.

18. A power tool system, characterized by: the battery pack comprises a shell, a battery module, a switching component and an interface, wherein the interface is electrically connected with the battery module to realize the input and/or output of energy, the switching component and the battery module are both accommodated in the shell, the battery module comprises a plurality of battery cell groups, the switching component is electrically connected with the battery module, the switching component switches the combination mode of the plurality of battery cell groups through rotation, when the first electric tool is coupled with the interface of the battery pack, the battery pack outputs a first voltage supplied to the first electric tool, and when the second electric tool is coupled with the interface of the battery pack, the battery pack outputs a second voltage that is supplied to a second power tool.

19. The power tool system of claim 18, wherein: the battery pack further comprises a first trigger electrically connected with the first electric tool and a second trigger electrically connected with the second electric tool, the first trigger and the second trigger are respectively provided with a trigger protrusion capable of triggering the switching assembly, and the first electric tool and the second electric tool enable the battery pack to output a first voltage or a second voltage through the first trigger and the second trigger respectively.

20. The power tool system of claim 19, wherein: the shell is provided with an opening corresponding to the switching component, and the triggering bulges on the first trigger and the second trigger the switching component through the opening.