BATTERY PACK

• US 20100236807A1
• Filed: 04/26/2010
• Published: 09/23/2010
• Est. Priority Date: 11/22/2002
• Status: Active Grant

• Current Assignee: Milwaukee Electric Tool Corporation (Techtronic Industries Company Limited)
• Original Assignee: Milwaukee Electric Tool Corporation (Techtronic Industries Company Limited)
• Inventors: Schuecher, Karl F., Kubale, Mark A., Johnson, Todd W., Glasgow, Kevin L., Rosenbecker, Jay J., Zeiler, Jeffrey M., Grzybowski, Dennis J., Meyer, Gary D.
• Granted Patent: US 8,154,249 B2
• Time in Patent Office: Days
• US Class Current: 173/217
• CPC Class Codes: B25F 5/00 Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
• CPC Class Codes: G01R 31/382 Arrangements for monitoring battery or accumulator variables, e.g. SoC
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 10/4207 for several batteries or cells simultaneously or sequentially
• CPC Class Codes: H01M 10/425 Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing printed circuits H05K1/00
• CPC Class Codes: H01M 10/441 for several batteries or cells simultaneously or sequentially
• CPC Class Codes: H01M 10/46 Accumulators structurally combined with charging apparatus circuits for charging H02J7/00
• CPC Class Codes: H01M 10/482 for several batteries or cells simultaneously or sequentially
• CPC Class Codes: H01M 2010/4271 Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
• CPC Class Codes: H01M 2200/00 Safety devices for primary or secondary batteries
• CPC Class Codes: H01M 2220/30 Batteries in portable systems, e.g. mobile phone, laptop
• CPC Class Codes: H01M 4/505 of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
• CPC Class Codes: H01M 4/525 of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
• CPC Class Codes: H01M 50/213 adapted for cells having curved cross-section, e.g. round or elliptic H01M50/209, H01M50/216 take precedence
• CPC Class Codes: H01M 50/247 specially adapted for portable devices, e.g. mobile phones, computers, hand tools or pacemakers
• CPC Class Codes: H01M 50/262 with fastening means, e.g. locks
• CPC Class Codes: H01M 50/296 characterised by terminals of battery packs terminals of batteries H01M50/543
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/0016 using shunting, discharge or bypass circuits
• CPC Class Codes: H02J 7/0025 : Sequential battery discharge in systems with a plurality of batteries
• CPC Class Codes: H02J 7/0031 : using battery or load disconnect circuits H02J9/002 takes precedence
• CPC Class Codes: H02J 7/0034 : using reverse polarity correcting or protecting circuits mechanical means of polarity protection H02J7/0045
• CPC Class Codes: H02J 7/0045 : concerning the insertion or the connection of the batteries
• CPC Class Codes: H02J 7/0048 : Detection of remaining charge capacity or state of charge [SOC]
• CPC Class Codes: H02J 7/005 : Detection of state of health [SOH]
• CPC Class Codes: H02J 7/0063 : with circuits adapted for supplying loads from the battery
• CPC Class Codes: H02J 7/0071 : with a programmable schedule
• CPC Class Codes: H02J 7/04 : Regulation of charging current or voltage
• CPC Class Codes: H05K 999/99 : dummy group
• CPC Class Codes: Y02E 60/10 : Energy storage using batteries
• CPC Class Codes: Y02T 10/70 : Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y10T 408/65 : Means to drive tool

Abstract

An electrical combination including a driver drill capable of producing an average current draw of approximately 20-amps, a circular saw capable of producing an average current draw of approximately 20-amps, and a power tool battery pack operable to supply power to the driver drill and to the circular saw, the battery pack including a plurality of battery cells, the plurality of battery cells each having a lithium-based chemistry.

Claims

1. An electrical combination comprising:

a driver drill capable of producing an average current draw of approximately 20-amps;

a circular saw capable of producing an average current draw of approximately 20-amps; and

a power tool battery pack operable to supply power to the driver drill and to the circular saw, the battery pack including a plurality of battery cells, the plurality of battery cells each having a lithium-based chemistry.

2. The electrical combination as set forth in claim 1 wherein the battery cells have a lithium-manganese chemistry.

3. The electrical combination as set forth in claim 1 wherein the battery cells have a lithium-manganese spinel chemistry.

4. The electrical combination as set forth in claim 1 wherein the plurality of battery cells includes seven battery cells.

5. The electrical combination as set forth in claim 1 wherein each of the plurality of battery cells has a nominal voltage of approximately 4.2-volts.

6. The electrical combination as set forth in claim 1 wherein the driver-drill includes

a driver-drill housing selectively connectable with the housing of the battery pack and operable to support the battery pack when connected, and

a motor supported by the driver-drill housing and operable to drive a drill bit, the plurality of battery cells being electrically connectable to the motor to selectively operate the motor.

7. The electrical combination as set forth in claim 1 wherein the circular saw includes

a saw housing selectively connectable with the housing of the battery pack and operable to support the battery pack when connected, and

a motor supported by the saw housing and operable to drive a saw blade, the plurality of battery cells being electrically connectable to the motor to selectively operate the motor.

8. The electrical combination as set forth in claim 1 wherein the battery pack includes a housing selectively connectable to and supportable by the driver drill and the circular saw, and wherein the plurality of battery cells have a combined nominal voltage of approximately 28-volts.

9. A battery pack for powering one of multiple power tools, the power tools including a driver drill and a circular saw, the battery pack comprising:

a housing selectively connectable to and supportable by the driver drill and the circular saw; and

a plurality of battery cells capable of producing an average discharge current of approximately 20-amps, the plurality of battery cells each having a lithium-based chemistry.

10. The battery pack as set forth in claim 9 wherein the battery cells have a lithium-manganese chemistry.

11. The battery pack as set forth in claim 9 wherein the battery cells have a spinel chemistry.

12. The battery pack as set forth in claim 9 wherein the plurality of battery cells includes seven battery cells.

13. The battery pack as set forth in claim 9 wherein each of the plurality of battery cells has a nominal voltage of approximately 4.2-volts.