# US 12,224,088 B2 · Coax cable for inductive charging

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- Number: US 12,224,088 B2
- Document ID: US12224088B2
- Status: Granted
- Kind: B2
- Application number: 17/608,559
- Filed: 2020-04-30
- Published: 2022-07-21
- Granted: 2025-02-11
- Earliest claimed: 2019-05-15
- Assignees: LEONI Kabel GmbH
- Applicants: Leoni Kabel GmbH
- Inventors: Sebastian Stengl; Guenter Koenig
- Web page: https://patentgrep.com/patent/US12224088B2

## CPC

- H01B 9/04: Concentric cables
- B60L 53/12: Inductive energy transfer
- H01B 1/02: mainly consisting of metals or alloys
- H01B 7/324: {comprising temperature sensing means}
- H01B 7/42: with arrangements for heat dissipation or conduction
- Y02T 10/70: Energy storage systems for electromobility, e.g. batteries
- Y02T 10/7072: Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
- H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K})
- 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
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A coaxial cable includes a non-conductive core and a first flexible copper conductor which surrounds the non-conductive core and is used as an inner conductor of the coaxial cable. Insulation is provided around the first flexible copper conductor. A second flexible copper conductor which surrounds the insulation and serves as an outer conductor of the coaxial cable.

## Claims

### Claim 1

A coaxial cable, comprising:
a non-conductive core;
a first flexible copper conductor which surrounds the non-conductive core and serves as the inner conductor of the coaxial cable;
a first insulation around the first flexible copper conductor;
a second flexible copper conductor which surrounds the first insulation and serves as the outer conductor of the coaxial cable;
a shielding arranged around the second flexible copper conductor;
a second insulation between the non-conductive core and the first flexible copper conductor; and
a third insulation between the second flexible copper conductor and the shielding;
wherein the non-conductive core comprises plastics material or is formed of plastics material; and wherein the non-conductive core comprises or is formed of a heat-absorbing insulating material, wherein each of the first, second, and third insulations comprises a thermoplastic insulating plastics material or consists of a thermoplastic insulating plastics material.

### Claim 2 (depends on 1)

The coaxial cable as claimed in claim 1, wherein the non-conductive core comprises air or is formed of air.

### Claim 3 (depends on 1)

The coaxial cable as claimed in claim 1, wherein the first flexible copper conductor comprises a plurality of individual copper wires which are not insulated from one another or is formed of a plurality of individual copper wires which are not insulated from one another and/or wherein the second flexible copper conductor comprises a plurality of individual copper wires which are not insulated from one another or is formed of a plurality of individual copper wires which are not insulated from one another.

### Claim 4 (depends on 1)

The coaxial cable as claimed in claim 1, wherein the first flexible copper conductor comprises one or more copper braids or is formed of one or more copper braids and/or wherein the second flexible copper conductor comprises one or more copper braids or is formed of one or more copper braids.

### Claim 5 (depends on 1)

The coaxial cable as claimed in claim 1, further comprising at least one sensor, wherein at least the at least one sensor is in the form of a temperature sensor which is configured to detect the temperature of the coaxial cable.

### Claim 6 (depends on 1)

The coaxial cable as claimed in claim 1, further comprising at least one second sensor which is configured to monitor a state of the cable and to communicate that state to a user via an evaluation unit.

### Claim 7 (depends on 5)

The coaxial cable as claimed in claim 5, wherein the temperature sensor is in the form of a sensor wire introduced into the coaxial cable in the form of a sensor wire braided into the coaxial cable.

### Claim 8 (depends on 1)

An electric vehicle charging device including the coaxial cable as claimed in claim 1.