CN111816818B - Battery Packs, Tool Systems and Charging Systems - Google Patents
Battery Packs, Tool Systems and Charging Systems Download PDFInfo
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- CN111816818B CN111816818B CN202010771291.XA CN202010771291A CN111816818B CN 111816818 B CN111816818 B CN 111816818B CN 202010771291 A CN202010771291 A CN 202010771291A CN 111816818 B CN111816818 B CN 111816818B
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- Prior art keywords
- cell module
- battery cell
- assembly
- terminal
- seat
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0024—Parallel/serial switching of connection of batteries to charge or load circuit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
- H02J7/0045—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction concerning the insertion or the connection of the batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
本发明提供了一种电池包、工具系统及充电系统。所述电池包包括壳体、收容在壳体内的电池组以及与电池组电性连接的端子组件，所述电池包还包括与电池组电性连接的转换组件，转换组件滑动设置，且当转换组件位于第一位置时，电池包输出第一电压值；当转换组件滑动至第二位置时，电池包输出第二电压值；当转换组件滑动至第三位置时，电池包输出第三电压值；所述第一电压值小于第二电压值，所述第二电压值小于第三电压值。相较于现有技术，本发明的电池包通过控制转换组件的滑动位置，来实现电池包内各个电芯模组的串并联状态切换，继而实现电池包输出电压的变化，提高了具有该电池包的工具系统的适配性。
The present invention provides a battery pack, a tool system and a charging system. The battery pack includes a shell, a battery pack contained in the shell, and a terminal assembly electrically connected to the battery pack. The battery pack also includes a conversion assembly electrically connected to the battery pack. The conversion assembly is slidably arranged, and when the conversion assembly is in a first position, the battery pack outputs a first voltage value; when the conversion assembly slides to a second position, the battery pack outputs a second voltage value; when the conversion assembly slides to a third position, the battery pack outputs a third voltage value; the first voltage value is less than the second voltage value, and the second voltage value is less than the third voltage value. Compared with the prior art, the battery pack of the present invention realizes the series-parallel state switching of each battery cell module in the battery pack by controlling the sliding position of the conversion assembly, thereby realizing the change of the output voltage of the battery pack, thereby improving the adaptability of the tool system having the battery pack.
Description
Technical Field
The present invention relates to the field of battery packs, and in particular, to a battery pack, a tool system, and a charging system.
Background
In the garden machine and power tool industries, tools with different rated voltages usually need to be powered by battery packs with different rated voltages, which causes an increase in the variety of battery packs and an increase in cost.
In view of the foregoing, there is a need for an improved battery pack, tool system, and charging system that addresses the above-described issues.
Disclosure of Invention
The invention aims to provide a battery pack, a tool system and a charging system which can realize quick switching and three voltage outputs.
The battery pack comprises a shell, a battery pack accommodated in the shell, and a terminal assembly electrically connected with the battery pack, wherein the battery pack at least comprises a first battery cell module, a second battery cell module, a third battery cell module and a fourth battery cell module, the battery pack further comprises a conversion assembly electrically connected with the battery cell module, the conversion assembly is arranged in a sliding mode, when the conversion assembly is located at a first position, the first battery cell module, the second battery cell module, the third battery cell module and the fourth battery cell module are mutually connected in parallel, the battery pack outputs a first voltage value, when the conversion assembly slides to a second position, the positive electrode of the first battery cell module is connected with the positive electrode of the second battery cell module, the negative electrode of the first battery cell module is connected with the positive electrode of the third battery cell module, the positive electrode of the fourth battery cell module is connected with the negative electrode of the third battery cell module, when the conversion assembly is located at the first position, the third battery cell module is connected with the negative electrode of the fourth battery cell, and when the conversion assembly slides to the second position, the second battery cell module is connected with the third battery cell module, and the third battery cell module is connected with the fourth battery cell module in series, and the voltage value is smaller than the first battery cell module and the third battery cell module is connected with the fourth battery cell module.
As a further improvement of the present invention, the conversion assembly includes a first connection assembly, a second connection assembly and a third connection assembly corresponding to the terminal assembly and disposed at intervals, when the conversion assembly is located at the first position, the terminal assembly is electrically connected with the first connection assembly, when the conversion assembly slides to the second position, the terminal assembly is electrically connected with the second connection assembly, and when the conversion assembly slides to the third position, the terminal assembly is electrically connected with the third connection assembly.
As a further improvement of the invention, the first connecting component comprises a first positive electrode connecting piece and a first negative electrode connecting piece, wherein the first positive electrode connecting piece is provided with four positive electrode pins so as to be respectively connected with positive electrodes of the first battery cell module, the second battery cell module, the third battery cell module and the fourth battery cell module, and the first negative electrode connecting piece is provided with four negative electrode pins so as to be respectively connected with negative electrodes of the first battery cell module, the second battery cell module, the third battery cell module and the fourth battery cell module.
As a further improvement of the present invention, the second connection assembly includes a second positive connection piece connecting the positive electrode of the first cell module with the positive electrode of the second cell module, a fourth connection piece connecting the positive electrode of the third cell module, the positive electrode of the fourth cell module, the negative electrode of the first cell module and the negative electrode of the second cell module, and a second negative connection piece connecting the negative electrode of the third cell module with the negative electrode of the fourth cell module.
As a further improvement of the present invention, the third connection assembly includes a first connection piece connecting the positive electrode of the second cell module with the negative electrode of the first cell module, a second connection piece connecting the positive electrode of the third cell module with the negative electrode of the second cell module, and a third connection piece connecting the positive electrode of the fourth cell module with the negative electrode of the third cell module, so as to realize the series connection of the first cell module, the second cell module, the third cell module, and the fourth cell module.
As a further improvement of the present invention, the conversion component includes an electrode insert seat and an internal insert seat, the terminal component and the internal insert seat are both accommodated in the electrode insert seat, and the first connection component, the second connection component and the third connection component are integrally formed in the internal insert seat.
As a further improvement of the invention, the inner insert seat is slidably arranged, and the first connecting component, the second connecting component and the third connecting component are arranged at intervals along the sliding direction of the inner insert seat.
As a further improvement of the present invention, the conversion assembly further includes a pushing portion for pushing the inner tab seat to slide, the third connection assembly is closer to the pushing portion than the second connection assembly, and the first connection assembly is farther from the pushing portion than the second connection assembly.
As a further improvement of the present invention, the inner insert seat includes a base body and a spring structure abutted against the base body, the first connection assembly, the second connection assembly and the third connection assembly are integrally formed with the base body, and the spring structure is compressed or released when the inner insert seat slides, so that the terminal assembly is switchably connected among the first connection assembly, the second connection assembly and the third connection assembly.
As a further improvement of the invention, the electrode insert seat is provided with a containing cavity, the terminal assembly and the internal insert seat are both contained in the containing cavity, the base body is provided with a sliding rail protruding towards one side of the electrode insert seat, the electrode insert seat is correspondingly provided with a through groove, and the sliding rail is contained in the through groove so as to guide the internal insert seat to slide in the electrode insert seat.
The invention further provides a battery pack which comprises a shell, a battery pack accommodated in the shell and a terminal assembly electrically connected with the battery pack, wherein the battery pack at least comprises a first battery cell module, a second battery cell module, a third battery cell module and a fourth battery cell module, the battery pack further comprises a conversion assembly electrically connected with the battery cell module, the conversion assembly is arranged in a sliding mode, when the conversion assembly is located at a first position, the first battery cell module, the second battery cell module, the third battery cell module and the fourth battery cell module are connected in parallel, the battery pack outputs a first voltage value, when the conversion assembly slides to a second position, the positive electrode of the first battery cell module is connected with the positive electrode of the second battery cell module, the negative electrode of the first battery cell module is connected with the positive electrode of the third battery cell module, the negative electrode of the third battery cell module is connected with the negative electrode of the fourth battery cell module, when the conversion assembly is located at the first position, the second battery cell module, the third battery cell module and the fourth battery cell module are connected in series, and when the second battery cell module and the third battery cell module are connected with the second battery cell module, the third battery cell module are connected in series, and the voltage value is smaller than the first battery cell module and the fourth battery cell module.
As a further improvement of the present invention, the conversion assembly includes a first connection assembly, a second connection assembly and a third connection assembly corresponding to the terminal assembly and disposed at intervals, when the conversion assembly is located at the first position, the terminal assembly is electrically connected with the first connection assembly, when the conversion assembly slides to the second position, the terminal assembly is electrically connected with the second connection assembly, and when the conversion assembly slides to the third position, the terminal assembly is electrically connected with the third connection assembly.
As a further improvement of the invention, the first connecting component comprises a first positive electrode connecting piece and a first negative electrode connecting piece, wherein the first positive electrode connecting piece is provided with four positive electrode pins so as to be respectively connected with positive electrodes of the first battery cell module, the second battery cell module, the third battery cell module and the fourth battery cell module, and the first negative electrode connecting piece is provided with four negative electrode pins so as to be respectively connected with negative electrodes of the first battery cell module, the second battery cell module, the third battery cell module and the fourth battery cell module.
As a further improvement of the present invention, the second connection assembly includes a second positive connection piece connecting the positive electrode of the first cell module with the positive electrode of the second cell module, a fifth connection piece connecting the positive electrode of the third cell module with the negative electrode of the second cell module, a sixth connection piece connecting the positive electrode of the fourth cell module with the negative electrode of the first cell module, and a second negative connection piece connecting the negative electrode of the third cell module with the negative electrode of the fourth cell module.
As a further improvement of the present invention, the third connection assembly includes a first connection piece connecting the positive electrode of the second cell module with the negative electrode of the first cell module, a second connection piece connecting the positive electrode of the third cell module with the negative electrode of the second cell module, and a third connection piece connecting the positive electrode of the fourth cell module with the negative electrode of the third cell module, so as to realize the series connection of the first cell module, the second cell module, the third cell module, and the fourth cell module.
As a further improvement of the present invention, the conversion component includes an electrode insert seat and an internal insert seat, the terminal component and the internal insert seat are both accommodated in the electrode insert seat, and the first connection component, the second connection component and the third connection component are integrally formed in the internal insert seat.
As a further improvement of the invention, the inner insert seat is slidably arranged, and the first connecting component, the second connecting component and the third connecting component are arranged at intervals along the sliding direction of the inner insert seat.
As a further improvement of the present invention, the conversion assembly further includes a pushing portion for pushing the inner tab seat to slide, the third connection assembly is closer to the pushing portion than the second connection assembly, and the first connection assembly is farther from the pushing portion than the second connection assembly.
As a further improvement of the present invention, the inner insert seat includes a base body and a spring structure abutted against the base body, the first connection assembly, the second connection assembly and the third connection assembly are integrally formed with the base body, and the spring structure is compressed or released when the inner insert seat slides, so that the terminal assembly is switchably connected among the first connection assembly, the second connection assembly and the third connection assembly.
As a further improvement of the invention, the electrode insert seat is provided with a containing cavity, the terminal assembly and the internal insert seat are both contained in the containing cavity, the base body is provided with a sliding rail protruding towards one side of the electrode insert seat, the electrode insert seat is correspondingly provided with a through groove, and the sliding rail is contained in the through groove so as to guide the internal insert seat to slide in the electrode insert seat.
To achieve the above object, the present invention provides a tool system comprising:
The battery pack comprises a shell, a battery pack accommodated in the shell, a terminal assembly and a conversion assembly, wherein the terminal assembly and the conversion assembly are electrically connected with the battery pack;
A first power tool operable at a first rated voltage, the first power tool provided with a first external blade seat;
A second power tool operable at a second rated voltage, the second power tool provided with a second external insert seat;
A third power tool operable at a third rated voltage, the third power tool provided with a third external blade seat;
When the battery pack is connected with a first external plug-in sheet seat of a first electric tool, the conversion assembly is positioned at a first position, and the battery pack outputs a first voltage value;
When the battery pack is connected with a second external plug-in seat of a second electric tool, the conversion assembly slides to a second position, and the battery pack outputs a second voltage value;
when the battery pack is connected with a third external plug-in seat of a third electric tool, the conversion assembly slides to a third position, the battery pack outputs a third voltage value, the first voltage value is smaller than a second voltage value, and the second voltage value is smaller than the third voltage value.
As a further improvement of the present invention, the first voltage value is "n" V, the second voltage value is "2n" V, and the third voltage value is "4n" V.
As a further improvement of the present invention, the conversion assembly includes an electrode insert holder and an internal insert holder, and the terminal assembly and the internal insert holder are both accommodated in the electrode insert holder, and the internal insert holder is slidably disposed.
As a further improvement of the invention, the electrode insert seat is provided with a containing cavity, the terminal assembly and the inner insert seat are both contained in the containing cavity, the inner insert seat is provided with a sliding rail protruding towards one side of the electrode insert seat, the electrode insert seat is correspondingly provided with a through groove, and the sliding rail is contained in the through groove so as to guide the inner insert seat to slide in the electrode insert seat.
As a further improvement of the invention, the conversion assembly further comprises a push rod for pushing the inner insert seat to slide, and the push rod and the outer insert seat are integrally formed.
As a further improvement of the present invention, the length of the first outer insert seat push-up lever is smaller than the length of the second outer insert seat push-up lever, and the length of the second outer insert seat push-up lever is smaller than the length of the third outer insert seat push-up lever.
To achieve the above object, the present invention also provides a charging system including:
The battery pack comprises a shell, a battery pack accommodated in the shell, a terminal assembly and a conversion assembly, wherein the terminal assembly and the conversion assembly are electrically connected with the battery pack, the battery pack at least comprises a first battery cell module, a second battery cell module, a third battery cell module and a fourth battery cell module, the conversion assembly is arranged in a sliding mode, and when the conversion assembly is at a first position, the battery pack outputs a first voltage value;
The charger is used for charging the battery pack, when the charger charges in butt joint with the battery pack, the conversion assembly is located at a first position, and the first battery cell module, the second battery cell module, the third battery cell module and the fourth battery cell module are connected in parallel.
The battery pack has the beneficial effects that the serial-parallel state switching of each battery core module in the battery pack is realized by controlling the sliding position of the conversion assembly, so that the change of the output voltage of the battery pack is realized, and the suitability of a tool system with the battery pack is improved.
Drawings
Fig. 1 is a perspective view of the tool system of the present invention.
Fig. 2 is an exploded view of the tool system of fig. 1.
Fig. 3 is an exploded view of the conversion assembly of fig. 2.
Fig. 4 is a partially assembled perspective view of the tool system of fig. 1.
Fig. 5 is a schematic view of the internal insert seat of fig. 3.
FIG. 6 is a schematic view of another view of the internal insert seat of FIG. 5.
FIG. 7 is a schematic view of the internal insert seat of FIG. 5 with the base removed.
Fig. 8 is a schematic view of the structure of the terminal assembly of fig. 3.
Fig. 9 is a schematic structural view of the electrode tab holder of fig. 3.
Fig. 10 is an exploded perspective view of the first external insert seat of fig. 3.
Fig. 11 is a schematic structural view of the terminal assembly connected to the first connecting assembly after the first external tab holder shown in fig. 10 is inserted.
Fig. 12 is a schematic view showing a circuit connection state in the battery pack after the first external tab holder shown in fig. 10 is inserted.
Fig. 13 is a circuit diagram of the connection of the battery pack after the first external tab holder shown in fig. 10 is inserted.
Fig. 14 is an exploded perspective view of the second external insert seat.
Fig. 15 is a schematic view showing a structure of the terminal assembly connected to the second connection assembly after the second external tab holder shown in fig. 14 is inserted.
Fig. 16 is a schematic view showing a state of circuit connection in the battery pack after the second external tab holder shown in fig. 14 is inserted.
Fig. 17 is a connection circuit diagram of the battery pack after the second external tab holder shown in fig. 14 is inserted.
Fig. 18 is another embodiment of the second connection assembly of fig. 7.
Fig. 19 is a schematic view showing a structure of the terminal assembly connected to the second connection assembly shown in fig. 18 after the second external tab holder shown in fig. 14 is inserted.
Fig. 20 is a schematic view of a circuit connection state in the battery pack corresponding to fig. 19.
Fig. 21 is a connection circuit diagram corresponding to the battery pack of fig. 19.
Fig. 22 is an exploded perspective view of a third external tab seat.
Fig. 23 is a schematic view showing a structure of the terminal assembly connected to the third connection assembly after the third external tab holder shown in fig. 22 is inserted.
Fig. 24 is a schematic view showing a circuit connection state in the battery pack after the third external tab holder shown in fig. 22 is inserted.
Fig. 25 is a circuit diagram showing the connection of the battery pack after the third external tab holder shown in fig. 22 is inserted.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 3, the present invention discloses a battery pack including a case 10, a battery pack 20 accommodated in the case 10, a PCB board 30, and a conversion assembly 40 and a terminal assembly 42 electrically connected with the battery pack 20. The battery pack 20 includes a plurality of battery cell modules, and the conversion assembly 40 is electrically connected with the battery cell modules. The conversion module 40 includes an electrode insert seat 41 and an inner insert seat 43 disposed opposite to the terminal module 42, and in the present invention, the terminal module 42 is preferably a female terminal module, but not limited thereto. The battery pack of the present invention is used on a tool system that also includes an external tab holder 50 that can be inserted into the battery pack to interface with the female terminal assembly 42 of the battery pack.
As shown in fig. 4 and 8 in combination with fig. 2 and 3, the electrode insert seat 41 is provided with a receiving cavity 411, the female terminal assembly 42 and the inner insert seat 43 are both received in the receiving cavity 411, and the female terminal assembly 42 is electrically connected with the electrode of the battery cell module through the PCB board 30. Specifically, the female terminal assembly 42 includes a positive terminal 421 and a negative terminal 422, wherein the positive terminal 421 includes a first positive terminal 423 and a second positive terminal 424, the first positive terminal 423 is used as a total positive output terminal to be in butt joint with the external plug-in pad 50, the second positive terminal 424 is respectively electrically connected with the positive electrodes of the corresponding battery modules, the negative terminal 422 also includes a first negative terminal 425 and a second negative terminal 426, the first negative terminal 425 is used as a total negative output terminal to be in butt joint with the external plug-in pad 50, and the second negative terminal 426 is respectively electrically connected with the negative electrodes of the corresponding battery modules, so as to realize the output of the voltage in the battery pack.
In this embodiment, the first positive electrode terminal 423 and the first negative electrode terminal 425 are disposed near one end of the electrode tab holder 41, the second positive electrode terminal 424 and the second negative electrode terminal 426 are located at approximately the middle position of the electrode tab holder 41, and the second positive electrode terminal 424 and the second negative electrode terminal 426 are arranged in a straight line. The battery pack 20 at least comprises four battery core modules, namely a first battery core module 21, a second battery core module 22, a third battery core module 23 and a fourth battery core module 24, wherein correspondingly, a first positive terminal 423 is connected with the positive electrode of the first battery core module 21, a first negative terminal 425 is connected with the negative electrode of the fourth battery core module 24, and 4 second positive terminals 424 and 4 second negative terminals 426 are arranged in a++ - -, from right to left, so as to be connected with the four battery core modules respectively.
A plurality of electric cores are arranged in each electric core module, and can be connected in series or in parallel, and not described in excess. Let the rated output voltage of each cell module be "n" V, i.e. the rated output voltage u 1 of the first cell module 21=the rated output voltage u 2 of the second cell module 22=the rated output voltage u 3 of the third cell module 23=the rated output voltage u 4 = "n" V of the fourth cell module 24.
The conversion assembly 40 is slidably disposed, when the conversion assembly 40 is located at the first position, the first cell module 21, the second cell module 22, the third cell module 23 and the fourth cell module 24 are connected in parallel, the battery pack outputs a first voltage value, when the conversion assembly 40 is slid to the second position, the positive electrode of the first cell module 21 is connected with the positive electrode of the second cell module 22, the negative electrode of the first cell module 21 is connected with the positive electrode of the second cell module 22, the positive electrode of the third cell module 23 is connected with the positive electrode of the fourth cell module 24, and the negative electrode of the third cell module 23 is connected with the negative electrode of the fourth cell module 24, and when the conversion assembly 40 is slid to the third position, the first cell module 21, the second cell module 22, the third cell module 23 and the fourth cell module 24 are connected in series, and the battery pack outputs a third voltage value. The first voltage value is less than the second voltage value, which is less than the third voltage value.
As shown in fig. 5 to 8 and fig. 3 and 4, the first connecting component 44, the second connecting component 45 and the third connecting component 46 corresponding to the female terminal component 42 and arranged at intervals are disposed in the inner insert seat 43, the inner insert seat 43 is slidably disposed, when being located at the first position, the female terminal component 42 is electrically connected with the first connecting component 44, when being slid to the second position, the female terminal component 42 is electrically connected with the second connecting component 45, and when being slid to the third position, the female terminal component 42 is electrically connected with the third connecting component 46.
The first connection assembly 44, the second connection assembly 45 and the third connection assembly 46 are arranged at intervals along the sliding direction (up-down direction) of the inner insert seat 43, when the female terminal assembly 42 is electrically connected with the first connection assembly 44, the first battery cell module 21, the second battery cell module 22, the third battery cell module 23 and the fourth battery cell module 24 are connected in parallel, a first voltage value outputted by the battery pack is "n" V, when the female terminal assembly 42 is electrically connected with the second connection assembly 45, the first battery cell module 21, the second battery cell module 22, the third battery cell module 23 and the fourth battery cell module 24 are connected in series-parallel (namely, connected in parallel after being connected in series or connected in series after being connected in parallel) and a second voltage value outputted by the battery pack is "2n" V, and when the female terminal assembly 42 is electrically connected with the third connection assembly 46, the first battery cell module 21, the second battery cell module 22, the third battery cell module 23 and the fourth battery cell module 24 are connected in series, and the third battery cell module 24 are connected in series.
Specifically, the first connection assembly 44 includes a first positive connection piece 441 and a first negative connection piece 442, the first positive connection piece 441 has four positive pins respectively connected to the positive poles of the first battery cell module 21, the second battery cell module 22, the third battery cell module 23 and the fourth battery cell module 24, and the first negative connection piece 442 has four negative pins respectively connected to the negative poles of the first battery cell module 21, the second battery cell module 22, the third battery cell module 23 and the fourth battery cell module 24. So designed, the first, second, third and fourth cell modules 21, 22, 23 and 24 are connected in parallel, and the first voltage value "n" V is equal to the rated output voltage of each cell module.
The second connection assembly 45 includes a second positive connection piece 451 connecting the positive electrode of the first cell module 21 with the positive electrode of the second cell module 22, a fourth connection piece 452 connecting the positive electrode of the third cell module 23, the positive electrode of the fourth cell module 24, the negative electrode of the first cell module 21 and the negative electrode of the second cell module 22, and a second negative connection piece 453 connecting the negative electrode of the third cell module 23 with the negative electrode of the fourth cell module 24. By such design, the first cell module 21 and the second cell module 22 are connected in parallel, the third cell module 23 and the fourth cell module 24 are connected in parallel, and then connected in series (i.e. first and then connected in series), and the second voltage value "2n" v is equal to the sum of rated output voltages of the two cell modules.
The third connection component 46 includes a first connection piece 461 connecting the positive electrode of the second cell module 22 with the negative electrode of the first cell module 21, a second connection piece 462 connecting the positive electrode of the third cell module 23 with the negative electrode of the second cell module 22, and a third connection piece 463 connecting the positive electrode of the fourth cell module 24 with the negative electrode of the third cell module 23, so as to realize the serial connection of the first cell module 21, the second cell module 22, the third cell module 23, and the fourth cell module 24, where the third voltage value "4n" v is equal to the sum of rated output voltages of the four cell modules.
The inner insert seat 43 includes a base 431 and a spring structure 432 abutting against the base 431, and the first connecting component 44, the second connecting component 45 and the third connecting component 46 are integrally formed with the base 431. The base 431 is provided with a rib 433 and a sliding groove 434 located at two sides of the rib 433, the first connecting component 44, the second connecting component 45 and the third connecting component 46 are formed and exposed on the rib 433, and two contact pieces 427 of each of the second positive terminal 424 and the second negative terminal 426 are respectively accommodated in the sliding groove 434 and clamp the rib 433, so that when the internal inserting piece seat 43 slides, the second positive terminal 424 and the second negative terminal 426 can be ensured to always slide in the sliding groove 434 and keep a state of being clamped and abutted with the rib 433.
As shown in fig. 5, 6 and 9 in combination with fig. 4, the base 431 is provided with an outwardly extending receiving portion 435, the inner wall of the electrode insert seat 41 is provided with a positioning column 412, one end of the spring structure 432 is sleeved on the outer periphery of the positioning column 412, and the other end abuts against the inner wall of the receiving portion 435. When the inner tab seat 43 slides, the spring structure 432 is compressed or released so that the female terminal assembly 42 is switchably connected between the first connection assembly 44, the second connection assembly 45 and the third connection assembly 46.
The base 431 is further provided with a sliding rail 436 protruding toward one side of the electrode insert seat 41, the electrode insert seat 41 is correspondingly provided with a through groove 413, and the sliding rail 436 is accommodated in the through groove 413 so as to guide the inner insert seat 43 to slide along the through groove 413 in the electrode insert seat 41. The number and arrangement of the slide rails 436 and the through slots 413 may be determined according to practical situations, and are not limited herein. A pushing portion 437 is formed on the base 431 at a side away from the receiving portion 435, and the slide rail 436 is disposed on the pushing portion 437. The pushing part 437 can be used to push the inner insert seat 43 to slide, the third connecting component 46 is closer to the pushing part 437 than the second connecting component 45, and the first connecting component 44 is farther from the pushing part 437 than the second connecting component 45.
The conversion assembly 40 further includes a push rod for further pushing the inner tab seat 43 to slide, the third connection assembly 46 is closer to the push rod than the second connection assembly 45, and the first connection assembly 44 is farther from the push rod than the second connection assembly 45. The push rod may be integrally formed with the base 431 or with the outer insert seat 50, so that when the outer insert seat 50 is inserted, the push rod may be used to force the inner insert seat 43 to slide, and thus electrically connect the female terminal assembly 42 with the first connection assembly 44 or the second connection assembly 45 or the third connection assembly 46.
When the push rod is formed on the external insert seat 50, the external insert seat 50 can be set into three independent external insert seats according to different lengths of the push rod, and push rods with different lengths can be set on one external insert seat, so that different configurations can be realized by switching the push rods with different lengths. For convenience of description, the tool system is defined to include a first power tool provided with a first external blade seat capable of operating at a first rated voltage, a second power tool provided with a second external blade seat capable of operating at a second rated voltage, and a third power tool provided with a third external blade seat capable of operating at a third rated voltage. The principles of use of the tool system of the present invention will be described in detail below using these three separate external insert seats.
The external insert seat 50 comprises a first external insert seat 51, a second external insert seat 52 and a third external insert seat 53, wherein the length of the push rod on the first external insert seat 51 is smaller than the length of the push rod 47 on the second external insert seat 52, and the length of the push rod 47 on the second external insert seat 52 is smaller than the length of the push rod 47' on the third external insert seat 53.
As shown in fig. 8 and 10, the first external insert seat 51 includes a body portion 511 and a male terminal 512 inserted into the body portion 511, and the length of the push rod on the body portion 511 is zero. The male terminal 512 includes a positive male terminal 513 and a negative male terminal 514, the positive male terminal 513 is configured to be abutted to the first positive terminal 423, and the negative male terminal 514 is configured to be abutted to the first negative terminal 425, so as to electrically conduct the battery pack female terminal assembly 42 and the first male terminal 512 of the external insert seat 51, and achieve current and voltage transmission.
As shown in fig. 11 to 13, when the first external tab holder 51 is inserted, the positive male terminal 513 is abutted to the first positive terminal 423, the negative male terminal 514 is abutted to the first negative terminal 425, the internal tab holder 43 is at the first position (i.e., at the bottom position of the electrode tab holder 41), and the female terminal assembly 42 is electrically connected to the first connection assembly 44, so that the first cell module 21, the second cell module 22, the third cell module 23 and the fourth cell module 24 are connected in parallel. According to the principle of parallel voltage division and series current division, the first voltage value output by the battery pack is equal to the rated output voltage of each battery cell module, namely U=u 1＝u2＝u3＝u4 = "n" V.
As shown in fig. 14, the second external plug-in pad 52 includes a body 521 and a male terminal 522 inserted in the body 521, the male terminal 522 includes a positive male terminal 523 and a negative male terminal 524, the positive male terminal 523 is configured to be abutted to the first positive terminal 423, and the negative male terminal 524 is configured to be abutted to the first negative terminal 425, so as to realize electrical conduction between the battery pack female terminal assembly 42 and the male terminal 522 of the second external plug-in pad 52, and realize current and voltage transmission.
Unlike the first external insert seat 51 shown in fig. 10, the body portion 521 of the second external insert seat 52 is provided with a push rod 47.
As shown in fig. 15 to 17, when the second external tab holder 52 is inserted, the push rod 47 pushes the pushing portion 437 on the internal tab holder 43 to force the internal tab holder 43 to slide upwards, the spring structure 432 is compressed until the positive male terminal 523 is abutted to the first positive terminal 423 and the negative male terminal 524 is abutted to the first negative terminal 425, at this time, the internal tab holder 43 slides to the second position (i.e. the middle position of the electrode tab holder 41), and the female terminal assembly 42 is electrically connected to the second connection assembly 45, so as to realize the connection mode (i.e. first and then second series) of the first cell module 21 and the second cell module 22 in parallel, and the third cell module 23 and the fourth cell module 24 in parallel, and then mutually series. According to the principle of parallel voltage division and series current division, the second voltage value output by the battery pack is equal to the sum of rated output voltages of the two battery cell modules, namely U=u 1+u2＝u3+u4 = "2n" V.
As shown in fig. 18, another embodiment of a second connection assembly 45 is provided. In this embodiment, the second connection assembly 45' includes a second positive connection tab 451' that connects the positive electrode of the first cell module 21 to the positive electrode of the second cell module 22, a fifth connection tab 452' that connects the positive electrode of the third cell module 23 to the negative electrode of the second cell module 22, a sixth connection tab 453' that connects the positive electrode of the fourth cell module 24 to the negative electrode of the first cell module 21, and a second negative connection tab 454' that connects the negative electrode of the third cell module 23 to the negative electrode of the fourth cell module 24. By such design, the first cell module 21 and the fourth cell module 24 are connected in series, the second cell module 22 and the third cell module 23 are connected in series, and then connected in parallel (i.e. serial-parallel connection is performed).
As shown in fig. 19 to 21, when the second external tab holder 52 shown in fig. 14 is inserted, the push rod 47 pushes the pushing portion 437 on the internal tab holder 43 to force the internal tab holder 43 to slide upwards, the spring structure 432 is compressed until the positive male terminal 523 is abutted to the first positive terminal 423 and the negative male terminal 524 is abutted to the first negative terminal 425, at this time, the internal tab holder 43 slides to the second position (i.e. the middle position of the electrode tab holder 41), and the female terminal assembly 42 is electrically connected to the second connection assembly 45', so as to realize the connection mode of connecting the first cell module 21 and the fourth cell module 24 in series, connecting the second cell module 22 and the third cell module 23 in series, and then connecting them in parallel. According to the principle of parallel voltage division and series current division, the second voltage value output by the battery pack is equal to the sum of rated output voltages of the two battery cell modules, namely U=u 1+u4＝u2+u3 = "2n" V.
As shown in fig. 22, the third external tab holder 53 includes a body portion 531 and a male terminal 532 inserted in the body portion 531, the male terminal 532 includes a positive male terminal 533 and a negative male terminal 534, the positive male terminal 533 is configured to be in butt joint with the first positive terminal 423, and the negative male terminal 534 is configured to be in butt joint with the first negative terminal 425, so as to realize electrical conduction between the battery pack female terminal assembly 42 and the male terminal 532 of the third external tab holder 53, and realize current and voltage transmission.
Unlike the second external insert seat 52 shown in fig. 14, the push rod 47 'is also provided on the body portion 531 of the third external insert seat 53, and the length of the push rod 47' is greater than that of the push rod 47.
As shown in fig. 23 to 25, when the third external tab holder 53 is inserted, the push rod 47' pushes the pushing portion 437 on the internal tab holder 43 to force the internal tab holder 43 to slide upwards, and the spring structure 432 is compressed until the positive male terminal 533 is abutted to the first positive terminal 423 and the negative male terminal 534 is abutted to the first negative terminal 425, at this time, the internal tab holder 43 slides to the third position (i.e. the top position of the electrode tab holder 41), and the female terminal assembly 42 is electrically connected to the third connection assembly 46, so as to realize the serial connection of the first cell module 21, the second cell module 22, the third cell module 23 and the fourth cell module 24. According to the principle of parallel voltage division and series current division, the third voltage value output by the battery pack is equal to the sum of rated output voltages of the four battery cell modules, namely U=u 1+u2+u3+u4 = "4n" V.
According to the above, it can be seen that after the different external insert seats 50 are selected, the output of different voltages of the battery pack can be realized, so as to meet the voltage requirements of three different electric tools, and the switching between the three voltages is quick and convenient.
The battery pack of the present invention is also applicable to a charging system (not shown) including the aforementioned battery pack and a charger for charging the battery pack. When the charger charges with the battery pack in a butt joint mode, the internal inserting sheet seat 43 is located at the first position, at this time, the first battery cell module 21, the second battery cell module 22, the third battery cell module 23 and the fourth battery cell module 24 are connected in parallel, the charging voltage output by the charger is equal to the rated output voltage of the single battery cell module, and the charging voltage is low, so that the battery pack is protected from being impacted by high current and high voltage.
In summary, in the battery pack of the present invention, the first connection assembly 44, the second connection assemblies 45, 45 'and the third connection assembly 46 are disposed at different positions of the inner insert seat 43, so that when the inner insert seat 43 slides to the first position or the second position or the third position, the female terminal assembly 42 can be selectively connected with the first connection assembly 44 or the second connection assembly 45, 45' or the third connection assembly 46 to realize the serial-parallel state switching of the battery cell module in the battery pack, thereby realizing the variation of the output voltage of the battery pack and improving the adaptability of the tool system with the battery pack.
The above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention.
Claims (23)
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010771291.XA CN111816818B (en) | 2020-08-04 | 2020-08-04 | Battery Packs, Tool Systems and Charging Systems |
| US18/005,063 US20230261248A1 (en) | 2020-08-04 | 2021-08-03 | Multi-voltage Battery Pack, Power Tool System and Charging System |
| EP21853485.7A EP4195390A4 (en) | 2020-08-04 | 2021-08-03 | MULTI-VOLTAGE BATTERY PACK, POWER TOOL SYSTEM AND CHARGING SYSTEM |
| PCT/CN2021/110243 WO2022028399A1 (en) | 2020-08-04 | 2021-08-03 | Multi-voltage battery pack, electric tool system, and charging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010771291.XA CN111816818B (en) | 2020-08-04 | 2020-08-04 | Battery Packs, Tool Systems and Charging Systems |
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| CN111816818A CN111816818A (en) | 2020-10-23 |
| CN111816818B true CN111816818B (en) | 2025-04-22 |
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| CN202010771291.XA Active CN111816818B (en) | 2020-08-04 | 2020-08-04 | Battery Packs, Tool Systems and Charging Systems |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022028399A1 (en) * | 2020-08-04 | 2022-02-10 | 格力博(江苏)股份有限公司 | Multi-voltage battery pack, electric tool system, and charging system |
| CN115765064A (en) * | 2021-09-06 | 2023-03-07 | 格力博(江苏)股份有限公司 | Power supply system and combination of power supply system and tool |
| WO2023099653A1 (en) * | 2021-12-01 | 2023-06-08 | Hilti Aktiengesellschaft | Connection device for an accumulator |
| CN219892229U (en) * | 2023-04-26 | 2023-10-24 | 鞠红 | Tool system and battery pack |
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