# US 11,451,185 B2 · Battery pack, power tool and battery pack charger system

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- Number: US 11,451,185 B2
- Document ID: US11451185B2
- Status: Granted
- Kind: B2
- Application number: 16/376,810
- Filed: 2019-04-05
- Published: 2019-08-01
- Granted: 2022-09-20
- Earliest claimed: 2016-10-06
- Assignees: Black & Decker Inc.
- Applicants: Black & Decker Inc.
- Inventors: Andrew E. Seman, Jr.; Matthew J. Velderman; Daniel J. White
- Web page: https://patentgrep.com/patent/US11451185B2

## CPC

- H02P 29/40: Regulating or controlling the amount of current drawn or delivered by the motor for controlling the mechanical load
- B60L 3/06: Limiting the traction current under mechanical overload conditions
- B60L 3/08: Means for preventing excessive speed of the vehicle
- C07F 5/022: {without C-boron linkages}
- H01M 8/04947: {of auxiliary devices, e.g. batteries, capacitors}
- H01M 10/0567: characterised by the additives
- H01M 10/0568: characterised by the solutes
- H01M 16/006: {of fuel cells with rechargeable batteries}
- H01M 50/20: Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders (structural combination of accumulators with charging apparatus H01M10/46)
- H01M 50/543: Terminals
- H02J 7/34: Parallel operation in networks using both storage and other DC sources, e.g. providing buffering (H02J7/14 takes precedence)
- B60L 1/003: {to auxiliary motors, e.g. for pumps, compressors}
- B60Y 2400/60: Electric Machines, e.g. motors or generators
- H01M 2220/30: Batteries in portable systems, e.g. mobile phone, laptop
- H02P: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- C07F: ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM (metal-containing porphyrins C07D487/22)
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY

## Abstract

When providing alternating current (AC) power to operate AC powered devices such as power tools (such as drills, table saws, miter saws), equipment (such as lawn mowers), and consumer products (such as refrigerators, television, lights) without being tied to a fixed utility power supply typically requires a generator (such as an internal combustion engine based generator) or a battery powered inverter. In order to meet power and runtime needs for these devices, a battery powered inverter must be relatively large and expensive. This simple fact prohibits their use in many environments.

## Claims

### Claim 1

A battery pack comprising:
a set of battery cells, the set of battery cells including a first subset and a second subset of battery cells and a pack control module, a set of switches coupled to the set of battery cells, a first switch of the set of switches coupled between a positive node of the first subset of battery cells and an AC output port and a second switch of the set of switches coupled between the AC output port and a negative node of the second subset of battery cells, the first subset and the second subset of battery cells sequentially coupled to the AC output port by the set of switches to provide an AC power signal at the AC output port, the first subset of battery cells solely providing a positive signal portion of the AC power signal at the AC output port and the second subset of battery cells solely providing a negative signal portion of the AC power signal at the AC output port.

### Claim 2 (depends on 1)

The battery pack, as recited in claim 1, wherein the set of battery cells provide a DC power signal while simultaneously providing the AC power signal.

### Claim 3 (depends on 1)

The battery pack, as recited in claim 1, further comprising a DC-DC converter for each subset of battery cells to produce a zero cross as part of the AC power signal.

### Claim 4 (depends on 3)

The battery pack, as recited in claim 3, wherein each DC-DC converter produces a step voltage signal from a battery voltage output by the set of battery cells.

### Claim 5 (depends on 3)

The battery pack, as recited in claim 3, wherein the set of battery cells provide a step voltage signal and the DC-DC converters provide a peak voltage.

### Claim 6 (depends on 1)

The battery pack, as recited in claim 1, comprising a first set of battery cells to provide a step voltage signal and a second set of battery cells to provide a peak voltage signal.