Lithium-based battery pack for a hand held power tool
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H01M-010/46
H02J-007/00
H01M-002/10
H01M-010/44
H02J-007/02
H01M-010/052
H01M-006/42
출원번호
US-0614191
(2017-06-05)
등록번호
US-9941718
(2018-04-10)
발명자
/ 주소
Johnson, Todd W.
Grzybowski, Dennis J.
Kubale, Mark A.
Rosenbecker, Jay J.
Scheucher, Karl F.
Meyer, Gary D.
Zeiler, Jeffrey M.
Glasgow, Kevin L.
출원인 / 주소
MILWAUKEE ELECTRIC TOOL CORPORATION
대리인 / 주소
Michael Best & Friedrich LLP
인용정보
피인용 횟수 :
0인용 특허 :
80
초록▼
A method for conducting an operation including a power tool battery pack. The battery pack can include a housing, a first cell supported by the housing and having a voltage, and a second cell supported by the housing and having a voltage. The battery pack also can be connectable to a power tool and
A method for conducting an operation including a power tool battery pack. The battery pack can include a housing, a first cell supported by the housing and having a voltage, and a second cell supported by the housing and having a voltage. The battery pack also can be connectable to a power tool and be operable to supply power to operate the power tool. The method can include discharging one of the first cell and the second cell until the voltage of the one of the first cell and the second cell is substantially equal to the voltage of the other of the first cell and the second cell.
대표청구항▼
1. A battery pack comprising: a housing connectable to and supportable by a hand held power tool;a plurality of battery cells supported within the housing, the plurality of battery cells connected in a combined series-parallel configuration, each of the plurality of battery cells having a lithium-ba
1. A battery pack comprising: a housing connectable to and supportable by a hand held power tool;a plurality of battery cells supported within the housing, the plurality of battery cells connected in a combined series-parallel configuration, each of the plurality of battery cells having a lithium-based chemistry, each of the plurality of battery cells being cylindrical and having a cell length of less than or equal to about 70 mm;first and second terminals for electrically connecting the battery pack to the hand held power tool; anda circuit configured to control a discharge of the plurality of battery cells to produce a discharge current from the plurality of battery cells,wherein an average of the discharge current produced by the plurality of battery cells is greater than or equal to approximately 20 amps. 2. The battery pack of claim 1, wherein the lithium-based chemistry includes manganese. 3. The battery pack of claim 1, wherein each of the plurality of battery cells has a spinel chemistry. 4. The battery pack of claim 1, wherein the battery pack has an ampere-hour capacity of at least 3.0 ampere-hours. 5. The battery pack of claim 1, wherein each of the plurality of battery cells has a cell length of between about 60 mm and about 70 mm. 6. The battery pack of claim 1, wherein each of the plurality of battery cells has a cell length of about 65 mm. 7. The battery pack of claim 1, wherein the circuit is configured to control a field-effect transistor (“FET”) to control the discharge of the plurality of battery cells. 8. The battery pack of claim 7, wherein the FET is within the housing. 9. The battery pack of claim 1, wherein the circuit includes a microprocessor. 10. An electrical combination comprising the battery pack of claim 1 and a hand held power tool. 11. An electrical combination comprising: a battery pack for supplying power to a hand held power tool, the battery pack including a battery pack housing connectable to and supportable by the hand held power tool, anda plurality of battery cells supported within the battery pack housing, the plurality of battery cells connected in a combined series-parallel configuration, each of the plurality of battery cells having a lithium-based chemistry, each of the plurality of battery cells being cylindrical and having a cell length of less than or equal to about 70 mm;first and second terminals for electrically connecting the battery pack and the hand held power tool; anda circuit configured to control a discharge of the plurality of battery cells to produce a discharge current from the plurality of battery cells and to supply the discharge current to the hand held power tool,wherein an average of the discharge current produced by the plurality of battery cells is greater than or equal to approximately 20 amps. 12. The combination of claim 11, wherein the lithium-based chemistry includes manganese. 13. The combination of claim 11, wherein the battery pack has an ampere-hour capacity of at least 3.0 ampere-hours. 14. The combination of claim 11, wherein each of the plurality of battery cells has a cell length of between about 60 mm and about 70 mm. 15. The combination of claim 11, wherein each of the plurality of battery cells has a cell length of about 65 mm. 16. The combination of claim 11, wherein the circuit is configured to control a field-effect transistor (“FET”) to control the discharge of the plurality of battery cells. 17. The combination of claim 16, wherein the FET is within the battery pack housing. 18. The combination of claim 11, wherein the circuit includes a microprocessor. 19. The combination of claim 18, wherein the microprocessor is within the battery pack housing. 20. The combination of claim 11, further comprising a hand held power tool.
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