# US 2023/0054340 A1 · Charging connector for electric vehicle

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- Number: US 2023/0054340 A1
- Document ID: US20230054340A1
- Status: Published application
- Kind: A1
- Application number: 17/496,027
- Filed: 2021-10-07
- Published: 2023-02-23
- Earliest claimed: 2021-08-20
- Assignees: T-Conn Precision (Zhongshan) Co., Ltd
- Applicants: T-Conn Precision (Zhongshan) Co., Ltd.
- Inventors: JIA-HENG ZHENG; WU-LIN LIU
- Web page: https://patentgrep.com/patent/US20230054340A1

## CPC

- B60L 53/16: Connectors, e.g. plugs or sockets, specially adapted for charging electric vehicles
- H01R 4/60: Connections between or with tubular conductors (H01R4/56 takes precedence)
- H01R 13/111: {co-operating with pins having a circular transverse section}
- H01R 24/52: mounted in or to a panel or structure
- H01R 13/15: Pins, blades or sockets having separate spring member for producing or increasing contact pressure
- H01R 13/193: Means for increasing contact pressure at the end of engagement of coupling part {, e.g. zero insertion force or no friction}
- H01R 2103/00: Two poles
- H01R 2201/26: for vehicles
- H05K 7/20436: {Inner thermal coupling elements in heat dissipating housings, e.g. protrusions or depressions integrally formed in the housing}
- 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
- Y02T 90/14: Plug-in 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
- H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A charging connector for an electrical vehicle has a connector base, a tubular first conductive terminal mounted in the connector base, an insulating isolation member mounted in the first conductive terminal, and a second conductive terminal mounted in a center of the isolation member and coaxially disposed in and electrically isolated from the first conductive terminal. The isolation member has at least one annular groove recessed in an upper surface of the isolation member, extending downwardly, and coaxially surrounding the second conductive terminal. A creepage distance between the first conductive terminal and the second conductive terminal is increased and a surface area for heat dissipation is increased to meet safety specifications.

## Claims

### Claim 1

A charging connector for an electric vehicle comprising:
a connector base;
a first conductive terminal mounted in the connector base via one of two ends of the first conductive terminal, extending out from the connector base via the other one of the two ends of the first conductive terminal, being tubular, and having
an upper cavity; and
a lower cavity formed in the first conductive terminal and having a recessed surface radially recessed in a cavity surface of the lower cavity to increase an internal diameter of the lower cavity;
an isolation member being complementary in shape to the lower cavity and mounted in the lower cavity, the isolation member having at least one annular groove coaxially recessed in an upper surface of the isolation member and extending downwardly; and
a second conductive terminal mounted in a center of the isolation member and coaxially disposed in and electrically isolated from the first conductive terminal, one of two ends of the second conductive terminal extending into the upper cavity of the first conductive terminal, and the other one of the two ends of the second conductive terminal extending out from a bottom of the isolation member.

### Claim 2 (depends on 1)

The charging connector for the electric vehicle as claimed in claim 1, wherein an outer annular groove and an inner annular groove are formed in the upper surface of the isolation member, and the outer annular groove is located at an outer side with respect to the inner annular groove.

### Claim 3 (depends on 2)

The charging connector for the electric vehicle as claimed in claim 2, wherein a depth of the outer annular groove is larger than half of a length of the isolation member.

### Claim 4 (depends on 2)

The charging connector for the electric vehicle as claimed in claim 2, wherein a depth of the inner annular groove is smaller than a depth of the outer annular groove, and the inner annular groove has a step recess recessed in a side of the inner annular groove near the center of the isolation member.

### Claim 5 (depends on 1)

The charging connector for the electric vehicle as claimed in claim 1, wherein
the second conductive terminal is tubular and has an upper channel and a lower channel formed in the second conductive terminal and communicating with each other, a diameter of the upper channel is larger than a diameter of the lower channel;
a flexible contact member and a contacting spring are mounted in the upper channel of the second conductive terminal;
the contacting spring is located at a lower segment of the upper channel; and
the flexible contact member is located at an upper segment of the upper channel and above the contacting spring.

### Claim 6 (depends on 5)

The charging connector for the electric vehicle as claimed in claim 5, wherein
the flexible contact member has an upper ring, a lower ring, and multiple contacting reeds;
two ends of each of the contacting reeds are respectively connected with the upper ring and the lower ring;
each of the contacting reeds of the flexible contact member is bended toward an axis in the upper ring and the lower ring to form a contact point; and
a distance from the contact point of each of the contacting reeds of the flexible contact member to the lower ring is larger than a distance from the contact point to the upper ring.

### Claim 7 (depends on 6)

The charging connector for the electric vehicle as claimed in claim 6, wherein
the contacting spring has a convergent portion formed on a top of the contacting spring; and
an external diameter of the convergent portion is smaller than an internal diameter of the lower ring of the flexible contact member and larger than an internal diameter of the flexible contact member at the contact points of the flexible contact member.

### Claim 8 (depends on 7)

The charging connector for the electric vehicle as claimed in claim 7, wherein
the lower channel of the second conductive terminal is a threaded hole;
the contacting spring has a dense-turn portion, where a coil of the contacting spring is wound closely and formed on a bottom of the contacting spring; and
a threaded rod extends into the dense-turn portion of the contacting spring and is threaded into the lower channel of the second conductive terminal,

### Claim 9 (depends on 1)

The charging connector for the electric vehicle as claimed in claim 1, wherein
a first connecting sheet and a second connecting sheet are mounted on a bottom of the connector base at a same side of the connector base and face to each other at an angle;
the first connecting sheet and the second connecting sheet each have one respective end extending into the connector base and connected with the first conductive terminal and the second conductive terminal respectively; and
a segment of each of the first connecting sheet and the second connecting sheet extending out from the connector base is covered by an insulation layer, except that an end of the segment is uncovered for electrical connection.

### Claim 10 (depends on 9)

The charging connector for the electric vehicle as claimed in claim 9, wherein the first connecting sheet and the second connecting sheet vertically extend out from the bottom of the connector base and are twisted to horizontally extend and to be parallel to each other.