US-12617302-B2 - Fast charge device for an electric or hybrid vehicle

US12617302B2US 12617302 B2US12617302 B2US 12617302B2US-12617302-B2

Abstract

The invention concerns a charging device for a hybrid or electric vehicle intended to be connected to an electricity distribution network ( 2 ) on the one hand, and to the terminals of the battery ( 10 ) of a hybrid or electric vehicle on the other hand, the device comprising two charging cables ( 61, 62 ) suitable for running, independently of each other, inside the vehicle, each being intended to be connected to a terminal of the battery, each charging cable ( 61, 62 ) comprising an electrical conductor ( 8 ) and at least one insulating layer ( 9 ) surrounding the electrical conductor ( 8 ), each charging cable further comprising a protective device (G) consisting of at least once sheath (G 1 , G 2 ) disposed around the insulating layer and matching the assembly formed by the electrical conductor ( 8 ) and the actuating layer ( 9 ).

Inventors

MEHDI AIT AMEUR
Christian MAGDELAINE

Assignees

ACOME

Dates

Publication Date: 20260505
Application Date: 20200522
Priority Date: 20190522

Claims (13)

1 . A charging device for a hybrid or electric vehicle intended to be connected to an electricity distribution network and to the terminals of a battery of a hybrid or electric vehicle, the charging device comprising two charging cables for running independently of each other inside a vehicle, a connector comprising an input intended to be connected to a power cable itself connected to an electrical network and an output from which the charging cables extend; each of the two charging cables being intended to be connected to a terminal of the battery at one end of the cable, and at the other end to a terminal of the connector output, each charging cable comprising an electrical conductor and at least one insulating layer surrounding the electrical conductor, means for promoting heat dissipation, comprising at least one sheath arranged around the insulating layer, the sheath matching an assembly formed by the electrical conductor and the insulating layer, wherein said at least one sheath is in intimate unbonded contact with the insulating layer for avoiding air gaps between the sheath and the insulating layer for promoting heat dissipation from the charging device inside the vehicle and at the connector.
2 . The charging device according to claim 1 , wherein said at least one sheath is disposed by an extrusion or co-extrusion method so as to be in intimate unbonded contact with the insulating layer on which the sheath is disposed.
3 . The charging device according to claim 1 , wherein said at least one sheath is a heat-shrinkable sheath so as to be in intimate unbonded contact with the layer on which the sheath is disposed.
4 . The charging device according to claim 1 , wherein the protection device comprises a first sheath in contact with the insulating layer.
5 . The charging device according to claim 4 , wherein the protection device further comprises a second sheath in contact with the first sheath.
6 . The charging device according to claim 5 , wherein the first sheath and the second sheath have identical radial thickness.
7 . The charging device according to claim 6 , wherein the first sheath and the second sheath are made of identical material.
8 . The charging device according to claim 4 , wherein the sheath is made of a material chosen among thermoplastic polymers.
9 . A charging assembly for a hybrid or electric vehicle comprising the charging device according to claim 1 and a power cable intended to be connected to an electricity distribution network.
10 . The charging device according to claim 6 , wherein the first sheath and the second sheath are made of different material.
11 . The charging device according to claim 8 , wherein the thermoplastic polymer is polyvinyl chloride.
12 . The charging device according to claim 8 , wherein the thermoplastic polymer is cross linked polyethylene.
13 . The charging device according to claim 5 , wherein the first sheath and the second sheath have different radial thicknesses.

Description

GENERAL TECHNICAL FIELD The invention relates to the field of electric or hybrid vehicles. And it relates more particularly to the fast charging of such vehicles. STATE OF THE ART The advent of the electrically powered vehicles required the development of solutions for recharging the batteries of these vehicles. As illustrated in FIG. 1, to recharge an electric vehicle 1, the electric battery 10 of the vehicle is connected to the electrical network 2 by a charging assembly comprising on either side of a connector 50 two cables 31, 32, 31′, 32′. The connector 50 allows connecting the charging device to the vehicle or disconnecting it therefrom. The charging of the vehicle is made either by means of an alternating current or by means of a direct current, the vehicles being equipped to be charged according to either of the other types of current. In the context of a direct current charging, inside the vehicle, two cables 31, 32 are connected on the one hand to the terminals of the battery 10 of the vehicle (a cable 31 for the positive terminal of the battery and a cable 32 for the negative terminal of the battery) and on the other hand to the connector 50. The part between the connector 50 and the battery is therefore located inside the vehicle 1. Outside the vehicle, two cables 31′, 32′ are connected on the one hand to the connector 50 and on the other hand to the electrical network 2. The part between the connector 50 and the electrical network 2 is therefore located outside the vehicle 1. For the outer part, the two cables 31′, 32′ are preferably arranged within the same shell to form a power cable 40. As illustrated in FIGS. 2 and 3, for the inner part, the cables 31, 32 are separately insulated and protected together with one or several braids 30, of textile or metallic nature. Particularly, each charging cable 31, 32 comprises an electrical conductor 8 surrounded by an insulating layer 9. The outer part and the inner part constitute a charging assembly, the inner part constitutes an internal charging device. Until now, the charging assemblies that have been developed allow obtaining recharging times of several hours (8 hours for example). These durations are considered too long for easy use of these vehicles. Also, there is a need to reduce these durations with the aim of reaching durations of 15 minutes, or even 5 minutes, for a complete recharging of the battery. As known, to decrease the charging duration, the electric current must be increased. However, such an increase in the electric current is not without problems since an excessive heating of the system by the Joule effect (W=R·I2) is observed. Particularly, the connector is dimensioned for a long-term charging and desired to be used in a short-term application. However, with an under-dimensioned conductive section, this results in a significant rise in temperature on this connector during the fast charging. One solution to overcome this excessive heating is to increase the sections of electrical conductors of the cables and the connectors. However, for reasons of standardization, it cannot be envisaged to modify the connector. And in addition, the increase of these sections inevitably leads to an increase in the cost and weight of the charging device, which is not desirable. PRESENTATION OF THE INVENTION The invention proposes to overcome the aforementioned drawback. To this end, the invention proposes, according to a first aspect, a charging device for a hybrid or electric vehicle intended to be connected to an electricity distribution network on the one hand and to the terminals of a battery of a hybrid or electric vehicle on the other hand, said device comprising two charging cables, each being intended to be connected to a terminal of the battery, each charging cable comprising an electrical conductor and at least one insulating layer surrounding the electrical conductor, each charging cable further comprising a protection device consisting of at least one sheath disposed around the insulating layer by matching the assembly formed by the electrical conductor and the insulating layer. The invention is advantageously supplemented by the following characteristics, taken alone or in any of their technically possible combinations: said at least one sheath is disposed by an extrusion or co-extrusion method so as to be in intimate unbonded contact with the layer on which the sheath is disposed;said at least one sheath is a heat-shrinkable sheath so as to be in intimate unbonded contact with the layer on which the sheath is disposed;the protection device comprises a first sheath in contact with the insulating layer;the protection device further comprises a second sheath in contact with the first sheath;the first sheath and the second sheath have identical or different radial thicknesses;the first sheath and the second sheath are made of identical or different material;the first sheath and the second sheath, where appropriate, are made of a material