# US 2022/0285960 A1 · Lithium-ion battery for engine starting > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2022/0285960 A1 - Document ID: US20220285960A1 - Status: Published application - Kind: A1 - Application number: 17/752,787 - Filed: 2022-05-24 - Published: 2022-09-08 - Earliest claimed: 2015-03-06 - Assignees: Briggs & Stratton Corporation - Applicants: Briggs & Stratton, LLC - Inventors: Jeffrey M. Zeiler; Richard J. Gilpatrick - Web page: https://patentgrep.com/patent/US20220285960A1 ## CPC - B60L 1/003: {to auxiliary motors, e.g. for pumps, compressors} - A01D 34/6818: {Motor starting mechanisms} - B60L 58/10: for monitoring or controlling batteries - B60W 10/26: for electrical energy, e.g. batteries or capacitors - F02N 11/0862: {characterised by the electrical power supply means, e.g. battery} - H01M 4/5825: {Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines} - H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries - H01M 10/46: Accumulators structurally combined with charging apparatus (circuits for charging H02J7/00) - H02J 7/14: for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle - H02J 7/60: including safety or protection arrangements - H02J 7/61: against overcharge - H02J 7/865: {Battery or charger load switching, e.g. concurrent charging and load supply (H02J7/50 takes precedence)} - A01D 2101/00: Lawn-mowers - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - Y02T 90/16: Information or communication technologies improving the operation of electric vehicles - 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 - A01D: HARVESTING; MOWING - B60W: CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT - F02N: STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR - 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 - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A starter battery system for an air cooled engine rated at less than 50 horsepower. The system includes four lithium iron phosphate cells and a charging circuit configured to be powered by rotation of an air cooled engine. A voltage developed by the charging circuit is applied to the four lithium iron phosphate cells without battery management circuitry provided between the charging circuitry and the four lithium iron phosphate cells. An engine which includes at least one piston, a rotatable crankshaft coupled to the at least one piston, a starter motor configured to selectively initiate rotation of the crankshaft, a lithium-ion battery in electrical communication with the starter motor, the lithium-ion battery having at least one cell, and a charging system configured to be powered by motion of at least one component of the engine. The charging system is configured to continuously apply a voltage potential to the at least one cell while the engine is in a running condition. An engine including at least one piston, a rotatable crankshaft coupled to the at least one piston, a starter motor configured to selectively initiate rotation of the crankshaft, a lithium-ion battery in electrical communication with the starter motor, the lithium-ion battery having four lithium iron phosphate cells, and a charging system configured to be powered by the engine. The charging system is electrically coupled to the lithium-ion battery and configured to charge the lithium-ion battery and no battery management circuitry is provided between the charging system and the lithium-ion battery. ## Claims ### Claim 1 A starter battery system for an air cooled engine rated at less than 50 horsepower, the system comprising: four lithium iron phosphate cells; and a charging circuit configured to be powered by rotation of an air cooled engine; wherein a voltage developed by the charging circuit is applied to the four lithium iron phosphate cells without battery management circuitry provided between the charging circuitry and the four lithium iron phosphate cells. ### Claim 2 (depends on 1) The system of claim 1, wherein the charging circuit includes an alternator and a voltage regulator. ### Claim 3 (depends on 1) The system of claim 1, wherein no cell protection circuitry is provided between the charging circuit and the four lithium iron phosphate cells. ### Claim 4 (depends on 1) The system of claim 1, wherein no charge control circuitry is provided between the charging circuit and the four lithium iron phosphate cells. ### Claim 5 (depends on 1) The system of claim 1, wherein the charging circuit comprises an ignition coil waste spark charging system. ### Claim 6 An engine comprising: at least one piston; a rotatable crankshaft coupled to the at least one piston; a starter motor configured to selectively initiate rotation of the crankshaft; a lithium-ion battery in electrical communication with the starter motor, the lithium-ion battery having at least one cell; and a charging system configured to be powered by motion of at least one component of the engine; wherein the charging system is configured to continuously apply a voltage potential to the at least one cell while the engine is in a running condition. ### Claim 7 (depends on 6) The engine of claim 6, wherein the lithium-ion battery comprises at least three cells. ### Claim 8 (depends on 6) The engine of claim 6, wherein the lithium-ion battery does not include battery management circuitry. ### Claim 9 (depends on 6) The engine of claim 6, wherein no cell protection circuitry is provided between the charging system and the lithium-ion battery. ### Claim 10 (depends on 6) The engine of claim 6, wherein no charge control circuitry is provided between the charging system and the lithium-ion battery. ### Claim 11 An engine comprising: at least one piston; a rotatable crankshaft coupled to the at least one piston; a starter motor configured to selectively initiate rotation of the crankshaft; a lithium-ion battery in electrical communication with the starter motor, the lithium-ion battery having four lithium iron phosphate cells; and a charging system configured to be powered by the engine; wherein the charging system is electrically coupled to the lithium-ion battery and configured to charge the lithium-ion battery; wherein no battery management circuitry is provided between the charging system and the lithium-ion battery. ### Claim 12 (depends on 11) The engine of claim 11, wherein the charging system includes an alternator. ### Claim 13 (depends on 11) The engine of claim 11, wherein no cell protection circuitry is provided between the charging system and the lithium-ion battery. ### Claim 14 (depends on 11) The engine of claim 11, wherein no charge control circuitry is provided between the charging system and the lithium-ion battery. ### Claim 15 (depends on 11) The engine of claim 11, further comprising a limiting system configured to limit an output provided to the lithium-ion battery, wherein the output comprises a current and a voltage. ### Claim 16 (depends on 15) The engine of claim 15, wherein the limiting system comprises a switching system, wherein the switching system is configured to disconnect a connection between the charging system and the lithium-ion battery based on at least one of the current and the voltage. ### Claim 17 (depends on 15) The engine of claim 15, wherein the limiting system comprises a switching circuit, wherein the switching circuit is configured to modify the output using pulse width modification. ### Claim 18 (depends on 15) The engine of claim 15, wherein the limiting system comprises a filtering circuit configured to modify a waveform of the output. ### Claim 19 (depends on 15) The engine of claim 15, wherein the limiting system comprises a zener diode or a metal oxide varistor configured to clamp the at least one of the voltage and the current.