# US 12,600,254 B2 · Solar charging system for vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,600,254 B2 - Document ID: US12600254B2 - Status: Granted - Kind: B2 - Application number: 17/729,383 - Filed: 2022-04-26 - Published: 2022-12-08 - Granted: 2026-04-14 - Earliest claimed: 2021-06-07 - Assignees: Hyundai Motor Company; Kia Corporation; Incheon National University Research & Business Foundation - Applicants: Hyundai Motor Company; Kia Corporation; Incheon National University Research & Business Foundation - Inventors: Jaehyuk Choi; Byeong Seob Song; Haeyoon Jung; Hyun-Wook Seong; Youngjin Jang; Hoyoung Jung; Sung Kyu Kim; Sungyong Park; Han-Shin Youn; Dong-In Lee; Sang-Min Kim; Sang-Hyuk Hong - Web page: https://patentgrep.com/patent/US12600254B2 ## CPC - B60L 53/51: Photovoltaic means - B60L 8/003: {Converting light into electric energy, e.g. by using photo-voltaic systems} - H02J 7/35: with light sensitive cells - H02M 1/348: {Passive dissipative snubbers} - H02M 3/33507: {with automatic control of the output voltage or current, e.g. flyback converters (H02M3/33561, H02M3/33569 take precedence)} - B60L 2210/10: DC to DC converters - H02J 2101/25: {involving maximum power point tracking control for photovoltaic sources} - Y02T 10/7072: Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors - 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 - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - 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) - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A solar charging system for the vehicle includes a first photovoltaic (PV) module, a second PV module serially connected to the first PV module, and a differential power processing (DPP) transformer that converts power generated from the first PV module and the second PV module by using a magnetic body having a multi-winding structure. ## Claims ### Claim 1 A solar charging system for a vehicle, comprising: a first photovoltaic (PV) module; a second PV module serially connected to the first PV module; and a differential power processing (DPP) transformer that converts power generated from the first PV module and the second PV module by using a magnetic body having a multi-winding structure, wherein the DPP transformer includes a plurality of primary side switches positioned and operated between the first PV module and the second PV module, and the magnetic body, and one secondary side switch positioned and operated between the magnetic body and a battery; and wherein the plurality of primary side switches is driven by one pulse width modulation (PWM) signal, and the one secondary side switch is complementarily driven with the plurality of primary side switches. ### Claim 2 (depends on 1) The solar charging system for the vehicle of claim 1, wherein the plurality of primary side switches are turned off while the one secondary side switch is turned on, and the one secondary side switch is turned off while the plurality of primary side switches are turned on. ### Claim 3 (depends on 1) The solar charging system for the vehicle of claim 1, wherein when an amount of power generation of the first PV module is larger than an amount of power generation of the second PV module, while the plurality of primary side switches are turned on, a positive voltage is applied to a leakage inductance of a first winding corresponding to the first PV module, and a negative voltage is applied to a leakage inductance of a second winding corresponding to the second PV module. ### Claim 4 (depends on 3) The solar charging system for the vehicle of claim 3, wherein while the plurality of primary side switches are turned on, a magnetizing current increases with a first slope. ### Claim 5 (depends on 4) The solar charging system for the vehicle of claim 4, wherein while the plurality of primary side switches are turned on, a first leakage current corresponding to the first PV module increases with a second slope that is larger than the first slope. ### Claim 6 (depends on 4) The solar charging system for the vehicle of claim 4, wherein while the plurality of primary side switches are turned on, a second leakage current corresponding to the second PV module decreases with a third slope. ### Claim 7 (depends on 3) The solar charging system for the vehicle of claim 3, wherein while the one secondary side switch is turned on, a magnetizing current decreases, so that a value of the magnetizing current is changed from positive to negative. ### Claim 8 (depends on 1) The solar charging system for the vehicle of claim 1, wherein the DPP transformer includes a flyback DPP transformer. ### Claim 9 (depends on 1) The solar charging system for the vehicle of claim 1, further comprising a controller that charges a battery with power generated from the first PV module and the second PV module by performing maximum power point tracking (MPPT) control. ### Claim 10 A solar charging system for a vehicle, comprising: a first PV module; a second PV module serially connected to the first PV module; one integrated transformer directly connected to the first PV module and the second PV module to receive a surplus current from the first PV module and provide a supplemental current corresponding to the surplus current to the second PV module; and a single controller that is electrically connected to both ends of the one integrated transformer and performs MPPT control to control output of the integrated transformer to charge a battery, wherein the one integrated transformer includes one integrated magnetic body; wherein the one integrated transformer includes a plurality of primary side switches positioned and operated between the first PV module and the second PV module, and the one integrated magnetic body, and one secondary side switch positioned and operated between the one integrated magnetic body and a battery; and wherein the plurality of primary side switches is driven by one pulse width modulation (PWM) signal, and the one secondary side switch is complementarily driven with the plurality of primary side switches. ### Claim 11 (depends on 10) The solar charging system for the vehicle of claim 10, wherein the one integrated magnetic body is provided with a first winding corresponding to the first PV module, a second winding corresponding to the second PV module, and a third winding corresponding to the battery. ### Claim 12 (depends on 11) The solar charging system for the vehicle of claim 11, wherein a ratio of the first winding, the second winding, and the third winding is 1:1:1. ### Claim 13 (depends on 10) The solar charging system for the vehicle of claim 10, wherein the plurality of primary side switches are turned off while the one secondary side switch is turned on, and the one secondary side switch is turned off while the plurality of primary side switches are turned on. ### Claim 14 (depends on 13) The solar charging system for the vehicle of claim 13, wherein while the plurality of primary side switches are turned on, a magnetizing current increases with a first slope. ### Claim 15 (depends on 14) The solar charging system for the vehicle of claim 14, wherein while the plurality of primary side switches are turned on, a first leakage current corresponding to the first PV module increases with a second slope that is larger than the first slope. ### Claim 16 (depends on 14) The solar charging system for the vehicle of claim 14, wherein while the plurality of primary side switches are turned on, a second leakage current corresponding to the second PV module decreases with a third slope. ### Claim 17 (depends on 13) The solar charging system for the vehicle of claim 13, wherein while the one secondary side switch is turned on, a magnetizing current decreases, so that a value of the magnetizing current is changed from positive to negative. ### Claim 18 (depends on 17) The solar charging system for the vehicle of claim 17, wherein while the magnetizing current has a negative value, the plurality of primary side switches are turned on.