# US 12,015,352 B2 · Power conversion apparatus

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- Number: US 12,015,352 B2
- Document ID: US12015352B2
- Status: Granted
- Kind: B2
- Application number: 17/697,487
- Filed: 2022-03-17
- Published: 2022-06-30
- Granted: 2024-06-18
- Earliest claimed: 2018-10-05
- Assignees: Denso Corporation
- Applicants: Denso Corporation
- Inventors: Shuji Kurauchi; Yuichi Handa; Seiji Iyasu; Yuji Hayashi
- Web page: https://patentgrep.com/patent/US12015352B2

## CPC

- H02M 3/33584: {Bidirectional converters}
- B60L 8/003: {Converting light into electric energy, e.g. by using photo-voltaic systems}
- B60L 15/007: {Physical arrangements or structures of drive train converters specially adapted for the propulsion motors of electric vehicles}
- B60L 50/00: Electric propulsion with power supplied within the vehicle (with power supply from force of nature, e.g. sun or wind, B60L8/00; for monorail vehicles, suspension vehicles or rack railways B60L13/00)
- B60L 50/60: using power supplied by batteries (in combination with fuel cells B60L50/75)
- B60L 53/22: Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
- B60L 53/67: Controlling two or more charging stations
- H02J 7/02: for charging batteries from AC mains by converters
- H02J 7/35: with light sensitive cells
- H02M 3/285: {Single converters with a plurality of output stages connected in parallel (parallel operation of a plurality of converters in DC distribution networks H02J1/10)}
- H02M 3/33561: {having more than one ouput with independent control}
- H02M 3/33573: {Full-bridge at primary side of an isolation transformer}
- H02M 3/33576: {having at least one active switching element at the secondary side of an isolation transformer}
- H02M 7/4807: {having a high frequency intermediate AC stage}
- H02M 7/797: using semiconductor devices only
- B60L 2210/30: AC to DC converters
- B60L 2210/40: DC to AC converters
- H02J 2105/37: exchanging power with electric vehicles [EV] or with hybrid electric vehicles [HEV]
- H02J 2207/20: Charging or discharging characterised by the power electronics converter
- H02M 1/008: {Plural converter units for generating at two or more independent and non-parallel outputs, e.g. systems with plural point of load switching regulators}
- H02M 1/009: {having two or more independently controlled outputs (for DC-DC converter with intermediate AC H02M3/33561)}
- Y02T 10/64: Electric machine technologies in electromobility
- Y02T 10/92: Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles
- Y02T 90/12: Electric charging stations
- Y02T 90/14: Plug-in electric 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)
- 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
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A power conversion apparatus connected to three or more voltage units, includes three or more power conversion circuits connected to respective units of the three or more voltage units; and a multiport transformer connected to the three or more power conversion circuits at mutually different ports, in which at least one voltage unit of the three or more voltage units is an electrical load.

## Claims

### Claim 1

A power conversion apparatus comprising:
a plurality of power conversion units, each power conversion unit comprising:
a multiport transformer including a primary input side and multiple secondary output sides; and
three or more power conversion circuits, each power conversion circuit being connected to one of the ports of the multiport transformer; and
first connection wiring that electrically connects, to be in parallel, between a first power conversion circuit in a first power conversion unit and a second power conversion circuit in a second power conversion unit,
wherein the first connection wiring is connected to a multiport transformer side of the first power conversion circuit and the second power conversion circuit.

### Claim 2 (depends on 1)

The power conversion apparatus according to claim 1, wherein
the first connection wiring includes a storage battery that is electrically connected thereto.

### Claim 3 (depends on 1)

The power conversion apparatus according to claim 1, wherein
the first power conversion unit comprises:
the first power conversion circuit electrically connected to a first voltage unit;
a third power conversion circuit electrically connected to a second voltage unit; and
a fourth power conversion circuit electrically connected to a third voltage unit; and
the second power conversion unit comprises:
the second power conversion circuit electrically connected to a fourth voltage unit;
a fifth power conversion circuit electrically connected to a fifth voltage unit; and
a sixth power conversion circuit electrically connected to the third voltage unit, the third voltage unit being electrically connected between the fourth power conversion circuit and the sixth power conversion circuit.

### Claim 4 (depends on 3)

The power conversion apparatus according to claim 3, wherein
the first voltage unit comprises a first battery, and the third voltage unit comprises a second battery;
the second voltage unit comprises a first load, and the fourth voltage unit comprises a second load; and
the fifth voltage unit comprises a solar power source.

### Claim 5 (depends on 4)

The power conversion apparatus according to claim 4, wherein
the first battery of the first voltage unit is a low-voltage battery; and
the second battery of the third voltage unit is a high-voltage battery.

### Claim 6 (depends on 3)

The power conversion apparatus according to claim 3, further comprising:
second connection wiring that electrically connects, to be in parallel, between the fourth power conversion circuit and the sixth power conversion circuit,
wherein the second connection wiring is connected to a side of the fourth power conversion circuit and the sixth power conversion circuit that is opposite to the multiport transformer side.