# US 2023/0411985 A1 · Charger for Power Storage Device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2023/0411985 A1 - Document ID: US20230411985A1 - Status: Published application - Kind: A1 - Application number: 18/210,336 - Filed: 2023-06-15 - Published: 2023-12-21 - Earliest claimed: 2022-06-16 - Assignees: Daifuku Co., Ltd. - Applicants: Daifuku Co., Ltd. - Inventors: Daizo Ninomiya; Atsushi Miyazaki; Hiroshi Matsubara; Hiroshi Onishi - Web page: https://patentgrep.com/patent/US20230411985A1 ## CPC - H02J 7/933: {the cycle being controlled or terminated in response to electric parameters} - B60L 53/122: Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil - B60L 53/62: in response to charging parameters, e.g. current, voltage or electrical charge - H02J 7/04: Regulation of charging current or voltage - H02J 7/80: including monitoring or indicating arrangements - H02J 7/94: in response to battery current - H02J 50/10: using inductive coupling - H02M 1/0025: {Arrangements for modifying reference values, feedback values or error values in the control loop of a converter} - H02M 3/156: with automatic control of output voltage or current, e.g. switching regulators - B60L 2210/30: AC to DC converters - B60L 2240/547: Voltage - B60L 2240/549: Current - Y02E 60/10: Energy storage using batteries - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - 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 - H02M: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF (transformers H01F; dynamo-electric converters H02K47/00; controlling transformers, reactors or choke coils, control or regulation of electric motors, generators or dynamo-electric converters H02P) - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A charger includes a power regulator that regulates power supplied from a power supply and outputs the power to a power storage device, a current detector that detects a battery current supplied to the power storage device, a voltage detector that detects a battery voltage, a controller that performs feedback control over the power regulator based on the battery current and the battery voltage, a feedback signal generator that generates, based on the battery current and the battery voltage, a power feedback signal usable for constant current control and constant voltage control, and a feedback calculator that generates, based on a difference between a command value and the power feedback signal, a control signal to control the power regulator. ## Claims ### Claim 1 A charger for a power storage device, the charger comprising: a power regulator configured to regulate power supplied from a power supply and output the power to a power storage device; a current detector configured to detect a battery current supplied from the power regulator to the power storage device; a voltage detector configured to detect a battery voltage between positive and negative electrodes of the power storage device; a controller configured to perform feedback control over the power regulator based on the battery current and the battery voltage, the controller switchable between constant current control and constant voltage control; a feedback signal generator configured to generate, based on the battery current and the battery voltage, a power feedback signal usable for the constant current control and the constant voltage control; and a feedback calculator configured to generate, based on a difference between a command value that is a target value of the battery current or the battery voltage and the power feedback signal, a control signal to control the power regulator through the constant current control or the constant voltage control. ### Claim 2 (depends on 1) The charger according to claim 1, wherein: at least one of the current detector or the voltage detector comprises a detection value adjuster configured to adjust a detection value to cause a signal level indicated by a detection value of the battery current and a signal level indicated by a detection value of the battery voltage to be equivalent to each other. ### Claim 3 (depends on 1) The charger according to claim 1, wherein: the feedback signal generator comprises a first diode with a first anode terminal and a first cathode terminal and a second diode with a second anode terminal and a second cathode terminal, and the first diode and the second diode are included in a wired-OR circuit in which the first anode terminal is connected to the current detector, the second anode terminal is connected to the voltage detector, and the first cathode terminal and the second cathode terminal are connected to each other. ### Claim 4 (depends on 1) The charger according to claim 1, wherein the power regulator is a chopper circuit comprising a switching element. ### Claim 5 (depends on 1) The charger according to claim 1, wherein, the power supply is a contactless receiver device comprising a receiver coil to receive power from a feeder coil contactlessly by electromagnetic induction and a rectifier circuit to rectify an alternating current received by the receiver coil into a direct current.