Multi-voltage battery pack, power tool system and charging system
Disclosure is a multi-voltage battery pack which includes: a housing, battery strings disposed inside the housing and including a plurality of battery cells, a battery interface disposed on the housing for use with the power tool, and a converting assembly disposed within the housing and electrically connected to the battery strings. The converting assembly has a first state, a second state, and a third state. The multi-voltage battery pack can separately output a first operating voltage, a second operating voltage, and a third operating voltage. The third operating voltage is greater than the second operating voltage, and the second operating voltage is greater than the first operating voltage.
1 . A multi-voltage battery pack for use with power tools of different operating voltages, the multi-voltage battery pack comprising:
a housing;
battery strings, disposed inside the housing, comprising:
a first battery string, including a plurality of battery cells arranged in series;
a second battery string, including a plurality of battery cells arranged in series;
a third battery string, including a plurality of battery cells arranged in series; and
a fourth battery string, including a plurality of battery cells arranged in series;
a battery interface, disposed on the housing for use with power tools;
a terminal assembly, disposed inside the housing and electrically connected with the battery strings; and
a converting assembly, comprising an internal socket disposed opposite the terminal assembly, the converting assembly disposed within the housing and electrically connected to the battery strings, the converting assembly having a first state, a second state, and a third state; wherein
the converting assembly comprises a first connecting assembly, a second connecting assembly, and a third connecting assembly simultaneously arranged at intervals inside the internal socket and connectable to the terminal assembly respectively, the first connecting assembly, the second connecting assembly, and the third connecting assembly are arranged at intervals along a sliding direction of the internal socket to form a plurality of rows, the first connecting assembly is in a first row of the plurality of rows, the second connecting assembly is in a second row of the plurality of rows, and the third connecting assembly is in a third row of the plurality of rows;
the first connecting assembly, the second connecting assembly, and the third connecting assembly have connecting sheets, the connecting sheets of the first connecting assembly, the second connecting assembly and the third connecting assembly are configured differently to switch connection states of the battery strings when the terminal assembly is connected to the first connecting assembly the second connecting assembly or the third connecting assembly,
connection states of the battery strings are switched through pushing the converting assembly to slide along the sliding direction of the internal socket to different positions so that the first connecting assembly, the second connecting assembly, or the third connecting assembly is connected to the terminal assembly;
when the terminal assembly is electrically connected to the first connecting assembly, the converting assembly is in the first state, the converting assembly is located at a first position, the multi-voltage battery pack outputs a first operating voltage;
when the terminal assembly is electrically connected to the second connecting assembly, the converting assembly is in the second state, the converting assembly is located at a second position, the multi-voltage battery pack outputs a second operating voltage; and
when the terminal assembly is electrically connected to the third connecting assembly, the converting assembly is in the third state, the converting assembly is located at a third position, the multi-voltage battery pack outputs a third operating voltage; wherein
the third operating voltage is greater than the second operating voltage, and the second operating voltage is greater than the first operating voltage.
2 . The multi-voltage battery pack of claim 1 , wherein
the first battery string is provided with a first positive electrode and a first negative electrode,
the second battery string is provided with a second positive electrode and a second negative electrode,
the third battery string is provided with a third positive electrode and a third negative electrode, and
the fourth battery string is provided with a fourth positive electrode and a fourth negative electrode.
3 . The multi-voltage battery pack of claim 2 , wherein
when the converting assembly is in the first state,
the first positive electrode, the second positive electrode, the third positive electrode and the fourth positive electrode are connected to each other,
the first negative electrode, the second negative electrode, the third negative electrode and the fourth negative electrode are connected to each other, and
the first battery string, the second battery string, the third battery string and the fourth battery string are connected in parallel.
4 . The multi-voltage battery pack of claim 2 , wherein
when the converting assembly is in the second state,
the first positive electrode and the second positive electrode are connected to each other,
the first negative electrode, the second negative electrode, the third positive electrode, and the fourth positive electrode are connected to each other,
the third negative electrode and the fourth negative electrode are connected to each other, and
the first battery string, the second battery string, the third battery string, and the fourth battery string are in a parallel-series state.
5 . The multi-voltage battery pack of claim 2 , wherein
when the converting assembly is in the second state,
the first positive electrode and the third positive electrode are connected to each other,
the first negative electrode and the second positive electrode are connected to each other,
the third negative electrode and the fourth positive electrode are connected to each other,
the second negative electrode and the fourth negative electrode are connected to each other, and
the first battery string, the second battery string, the third battery string, and the fourth battery string are in a series-parallel state.
6 . The multi-voltage battery pack of claim 2 , wherein
when the converting assembly is in the third state,
the first negative electrode is connected to the second positive electrode,
the second negative electrode is connected to the third positive electrode,
the third negative electrode is connected to the fourth positive electrode, and
the first battery string, the second battery string, the third battery string, and the fourth battery string are connected in series.
7 . The multi-voltage battery pack of claim 1 , wherein
the voltages of the first battery string, the second battery string, the third battery string, and the fourth battery string are separately nV,
the first operating voltage is nV,
the second operating voltage is 2nV, and
the third operating voltage is 4nV.
8 . The multi-voltage battery pack of claim 7 , wherein
when nV is 18 V,
the first operating voltage is 18 V,
the second operating voltage is 36 V, and
the third operating voltage is 72 V.
9 . The multi-voltage battery pack of claim 7 , wherein
when nV is 20 V,
the first operating voltage is 20 V,
the second operating voltage is 40 V, and
the third operating voltage is 80 V.
10 . The multi-voltage battery pack according to claim 7 , wherein
when nV is 24 V,
the first operating voltage is 24 V,
the second operating voltage is 48 V, and
the third operating voltage is 96 V.
11 . The multi-voltage battery pack of claim 1 , further comprising a circuit board and an output terminal, wherein
the circuit board is disposed inside the housing and electrically connected to the output terminal,
the output terminal is used for outputting energy to the power tool, and
an output terminal groove is configured on the battery interface to contain the output terminal.
12 . The multi-voltage battery pack of claim 1 , wherein
the first battery string is horizontally disposed, the second battery string is disposed above the first battery string, the third battery string is disposed above the second battery string, and the fourth battery string is disposed above the third battery string.
13 . The multi-voltage battery pack of claim 1 , wherein
each of the first battery string, the second battery string, the third battery string, and the fourth battery string includes five battery cells.
14 . The multi-voltage battery pack according to claim 1 , wherein
each of the first battery string, the second battery string, the third battery string, and the fourth battery string includes six battery cells.
15 . The multi-voltage battery pack according to claim 1 , wherein
in an initial state, the converting assembly is in the first state, the first battery string, the second battery string, the third battery string, and the fourth battery string are connected in parallel, and the multi-voltage battery pack outputs the first operating voltage.
16 . The multi-voltage battery pack of claim 1 , wherein
the internal socket further comprises a substrate and a spring structure, the first connecting assembly, the second connecting assembly, and the third connecting assembly are integrally-formed with the substrate, the substrate is provided with ribs and sliding grooves located on both sides of each rib, the first connecting assembly, the second connecting assembly, and the third connecting assembly are formed and exposed on the ribs, contact sheets of the terminal assembly are contained in the sliding grooves and clamping the ribs respectively, when the internal socket slides, the terminal assembly slides within the sliding grooves and maintains a state in which the ribs are clamped and abutted by the contact sheets of the terminal assembly,
when the internal socket slides to the first position along the sliding grooves, the terminal assembly is electrically connected to the first connecting assembly, the first battery string, the second battery string, the third battery string, and the fourth battery string are connected in parallel to output the first operating voltage;
when the internal socket slides to the second position along the sliding grooves, the terminal assembly is electrically connected to the second connecting assembly, so that the first battery string is connected in parallel with the second battery string, the third battery string is connected in parallel with the fourth battery string, and then the first battery string and the second battery string are connected in series with the third battery string and the fourth battery string to output the second operating voltage; or the first battery string is connected in series with the second battery string, the third battery string is connected in series with the fourth battery string, and then the first battery string and the second battery string are connected in parallel with the third battery string and the fourth battery string to output the second operating voltage;
when the internal socket slides to the third position along the sliding grooves, the terminal assembly is electrically connected to the third connecting assembly, the first battery string, the second battery string, the third battery string, and the fourth battery string are connected in series to output the third operating voltage.
17 . A power tool system, comprising:
a first power tool, having a first tool interface and capable of operating at a first operating voltage;
a second power tool, having a second tool interface and capable of operating at a second operating voltage;
a third power tool, having a third tool interface and capable of operating at a third operating voltage; and
a multi-voltage battery pack comprising:
a housing;
battery strings, disposed inside the housing, comprising:
a first battery string, including a plurality of battery cells arranged in series;
a second battery string, including a plurality of battery cells arranged in series;
a third battery string, including a plurality of battery cells arranged in series; and
a fourth battery string, including a plurality of battery cells in series;
a battery interface, disposed on the housing for use with (1) the first tool interface of the first power tool, (2) the second tool interface of the second power tool, and (3) the third tool interface of the third power tool;
a terminal assembly, disposed inside the housing and electrically connected with the battery strings; and
a converting assembly, comprising an internal socket disposed opposite the terminal assembly, the converting assembly disposed within the housing and electrically connected to the battery strings, the converting assembly having a first state, a second state, and a third state, wherein
the converting assembly comprises a first connecting assembly, a second connecting assembly, and a third connecting assembly simultaneously arranged at intervals inside the internal socket and connectable to the terminal assembly respectively, the first connecting assembly, the second connecting assembly, and the third connecting assembly are arranged at intervals along a sliding direction of the internal socket to form a plurality of rows, the first connecting assembly is in a first row of the plurality of rows, the second connecting assembly is in a second row of the plurality of rows, and the third connecting assembly is in a third row of the plurality of rows;
the first connecting assembly, the second connecting assembly, and the third connecting assembly have connecting sheets, the connecting sheets of the first connecting assembly, the second connecting assembly and the third connecting assembly are configured differently to switch connection states of the battery strings when connecting the terminal assembly to the first connecting assembly, the second connecting assembly or the third connecting assembly,
connection states of the battery strings are switched through pushing the converting assembly to slide along the sliding direction of the internal socket to different positions so that the first connecting assembly, the second connecting assembly, or the third connecting assembly is connected to the terminal assembly:
when the terminal assembly is electrically connected to the first connecting assembly, the first power tool is coupled with the multi-voltage battery pack, the converting assembly is in the first state, the converting assembly is located at a first position, and the multi-voltage battery pack outputs the first operating voltage to the first power tool;
when the terminal assembly is electrically connected to the second connecting assembly, the second power tool is coupled with the multi-voltage battery pack, the converting assembly is in the second state, the converting assembly is located at a second position, and the multi-voltage battery pack outputs the second operating voltage to the second power tool; and
when the terminal assembly is electrically connected to the third connecting assembly, the third power tool is coupled with the multi-voltage battery pack, the converting assembly is in the third state, the converting assembly is located at a third position, and the multi-voltage battery pack outputs the third operating voltage to the third power tool; wherein
the third operating voltage is greater than the second operating voltage, and the second operating voltage is greater than the first operating voltage.
18 . The power tool system of claim 17 , wherein
the first tool interface has a first plug of a first configuration,
the second tool interface has a second plug of a second configuration, and
the third tool interface has a third plug of a third configuration, wherein
the first plug, the second plug, and the third plug are different in configuration.
19 . The power tool system of claim 18 , wherein
at least two of the first plug, the second plug, and the third plug are provided with a triggering device, and the triggering device is used for cooperating with the converting assembly to enable the converting assembly to switch between different states.
20 . A charging system, comprising:
a charger, having a charging interface; and
a multi-voltage battery pack for use with power tools of different operating voltages, the multi-voltage battery pack comprising:
a housing;
battery strings, disposed inside the housing, comprising:
a first battery string, including a plurality of battery cells arranged in series;
a second battery string, including a plurality of battery cells arranged in series;
a third battery string, including a plurality of battery cells arranged in series; and
a fourth battery string, including a plurality of battery cells arranged in series;
a battery interface, disposed on the housing for use with power tools;
a terminal assembly, disposed inside the housing and electrically connected with the battery strings; and
a converting assembly, comprising an internal socket disposed opposite the terminal assembly, the converting assembly disposed within the housing and electrically connected to the battery strings, the converting assembly having a first state, a second state, and a third state; wherein
the converting assembly comprises a first connecting assembly, a second connecting assembly, and a third connecting assembly simultaneously arranged at intervals inside the internal socket and connectable to the terminal assembly respectively, the first connecting assembly, the second connecting assembly, and the third connecting assembly are arranged at intervals along a sliding direction of the internal socket to form a plurality of rows, the first connecting assembly is in a first row of the plurality of rows, the second connecting assembly is in a second row of the plurality of rows, and the third connecting assembly is in a third row of the plurality of rows;
the first connecting assembly, the second connecting assembly, and the third connecting assembly have connecting sheets, the connecting sheets of the first connecting assembly, the second connecting assembly and the third connecting assembly are configured differently to switch connection states of the battery strings when connecting the terminal assembly to the first connecting assembly, the second connecting assembly or the third connecting assembly,
connection states of the battery strings are switched through pushing the converting assembly to slide along the sliding direction of the internal socket to different positions so that the first connecting assembly, the second connecting assembly, or the third connecting assembly is connected to the terminal assembly;
when the terminal assembly is electrically connected to the first connecting assembly, the converting assembly is in the first state, the converting assembly is located at a first position, the multi-voltage battery pack outputs a first operating voltage;
when the terminal assembly is electrically connected to the second connecting assembly, the converting assembly is in the second state, the converting assembly is located at a second position, the multi-voltage battery pack outputs a second operating voltage; and
when the terminal assembly is electrically connected to the third connecting assembly, the converting assembly is in the third state, the converting assembly is located at a third position, the multi-voltage battery pack outputs a third operating voltage; wherein
the third operating voltage is greater than the second operating voltage, and the second operating voltage is greater than the first operating voltage;
wherein when the multi-voltage battery pack is coupled with the charger, the charging interface is coupled with the battery interface, the converting assembly is in the first state, and the first battery string, the second battery string, the third battery string, and the fourth battery string are connected in parallel, then the charger charges the multi-voltage battery pack in the first operating voltage.