The disclosed concept relates generally to an electric vehicle (EV) charger cable management system, and in particular, to an overhead EV charger cable management system for EV chargers.
As the world transitions to sustainable and renewable energy, the demand for electric vehicles has recently increased significantly. For example, in 2022 EV sales grew by 65% while total new vehicle sales fell 8%. It is forecasted that 1 million or more EV sales will sell in the U.S. in 2023. As more and more entities transition to the EV, the demand for electric vehicle supply equipment (EVSE) has also increased significantly. An EVSE, also called an EV charging station, is an element in an infrastructure that supplies electric energy for the recharging of electric energy for the recharging of EVs, plug-in hybrid electric-gasoline vehicles, or semi-static and mobile electrical units such as exhibition stands. The 1996 NEC and California Article 625 define EVSE as being the conductors, including the ungrounded, grounded, and equipment grounding conductors, the electric vehicle connectors, attachment plugs, and all other fittings, devices, power outlets or apparatus installed specifically for the purpose of delivering energy from premises wiring to an electric vehicle. EVSE is defined by the Society of Automotive Engineers (SAE) recommended practice J1772 and the National Fire Protection Association (NFPA) National Electric Code (NEC) Article 625. While the NEC defines several safety requirements, J1772 defines the physical conductive connection type, five pin functions (i.e., two power pins (Hot1 and Hot2 or neutral; or Line 1 and Line 2), one ground pin, one control pilot pin, and one proximity pin), the EVSE to EV handshake over the pilot pin, and how both parts (EVSE and EV) are supposed to function. Two-way communication seeks to ensure that the current passed to the EV is both below the limits of the EV can receive. There are additional safety features, such as a safety lock-out, that does not allow current to flow from the EV charging station until the EV connector or EV plug is physically inserted into the EV and the EV is ready to accept energy. For example, J1772 in North America uses a very simple but effective pilot circuit and handshake in the EVSE.
Conventional EVSEs consist of an EV charger (typically, included within a charging box) along with a connected EV cable/connector for the intended purpose of charging the EV. While a conventional EVSE requires a pedestal or wall-mounted EV charger with an RFID reader embedded in the EV charger, there are some EVSE that do not require such pedestal or wall-mounted EV charger. For example, an EV charger in a circuit breaker form factor may be installed in a power panel remotely located from the EVSE and the circuit-breaker based EV charger is coupled to a junction box located at a charging location (e.g., a parking lot, a residential garage, a charging station, etc.), the disconnect switch box including terminal blocks for the communication lines (e.g., a control pilot line, etc.). As such, an EVSE coupled to a circuit-breaker based EV charger does not have a standalone charging station. Rather, the EV charger is connected to the junction box, which can be used to connect or disconnect various switches coupled to the remotely located power panel (e.g., a power panel in a control room or a basement). The EV connector in turn is connected to the junction box via the EV charging cable. However, the EV charger cable is typically at least 7.5 meters (25 feet) long under the standards. Thus, the EV charger cable needs to be managed in an orderly manner such that the EV charger cable and the EV connector are not damaged before and after charging an EV.
There is room for improvement in EV charger cable management systems.
These needs, and others, are met by an electric vehicle (EV) charger cable management system for use at an EV charging facility coupled to a power source via an EV charger. The EV charger cable management system includes an EV charger cord set including an EV connector and an EV charger cable coupled to the EV connector; a bracket; and a junction box coupled to the EV charger cable and including electrical wirings, the junction box being structured to electrically connect the EV charger to the EV charger cord set via the electric wirings, be affixed to a portion of top surface of the EV charging facility via the bracket, and maintain a majority of the EV charger cord set to be suspended overhead and out of a path of a user or the EV.
Another example embodiment provides an EV charger cable management system for use at an EV charging facility coupled to a power source via an EV charger. The EV charger cable management system includes: an EV charger cord set including an EV connector and an EV charger cable coupled to the EV connector; a bracket; a junction box coupled to the EV charger cable and including electrical wirings, the junction box being structured to electrically connect the EV charger to the EV charger cord set via the electric wirings and be affixed to a first portion of top surface of the EV charging facility via the bracket; a retractor including a fixing component, a retractor cord and a cord grip attached to the retractor cord, the retractor being structured to be affixed to a second portion of the top surface at one end via the fixing component and to the retractor cord at another end, grip one end of a majority of the EV charger cord set via the cord grip, raise the EV connector to a first height for storage and lower the EV connector to a second height for charging; and a cord holder including a fixing component and a strain relief, the cord holder being structured to be affixed to a third portion of the top surface via the fixing component, wherein the junction box, the retractor and the cord holder together maintain the majority of the EV charger cord set to be suspended overhead and out of a path of the user and/or the EV via the strain relief.
Yet another example embodiment provides an EV charger cable management system for use at an EV charging facility coupled to a power source via an EV charger. The EV charger cable management system includes: an EV charger cord set including an EV connector and an EV charger cable coupled to the EV connector; a bracket; a junction box coupled to the EV charger cable and including electrical wirings, the junction box being structured to electrically connect the EV charger to the EV charger cord set via the electric wirings and be affixed to a first portion of top surface of the EV charging facility via the bracket; and a trolley system structured to maintain the EV charger cord set off the ground of the EV charging facility at all times, the trolley system including one or more trolleys structured to be affixed to another portion of the top surface in a series via fixing components, one or more trolly tracks each including wheels and being structured to travel away and toward the junction box via corresponding trolly tracks, one or more holding cords each attached to corresponding trolleys and extending downwardly, and one or more cord grips each attached to corresponding holding cords and structured to grip ends of corresponding holding portions, wherein the one or more trolleys, the one or more holding cords, the one or more cord grips and the junction box together hold a majority of the EV charger cord set at a predetermined height and maintain a remaining portion of the EV charger cord set including the EV connector to be suspended off the ground.
A full understanding of the invention can be gained from the following description of the preferred embodiments when read in conjunction with the accompanying drawings in which:
Directional phrases used herein, such as, for example, left, right, front, back, top, bottom and derivatives thereof, relate to the orientation of the elements shown in the drawings and are not limiting upon the claims unless expressly recited therein.
As employed herein, the statement that two or more parts are “coupled” together shall mean that the parts are joined together either directly or joined through one or more intermediate parts.
The EV charger cable management system 1 includes a junction box 11, a bracket 12, and an EV charger cord set 13 and is structured to manage the EV charger cord set 13 during use and storage. The EV charger cord set 13 includes a standard EV charger cable 14 and a standard EV connector 15 coupled to the EV charger cable 14. The EV charger cable 14 has a length of 25 ft in accordance with the standards. The junction box 11 is coupled to the EV charger cable 14 and includes electrical wirings (not shown). The junction box is structured to electrically connect the EV charger 4 to the EV charger cord set 13 via the electrical wirings. The electrical wirings include power lines and communication lines for supplying power to charge an EV 6 and communicate with the EV charger 4 and the EV 6 for charging, terminating the charging or interrupting current. Optionally, the EV charger circuit breaker 4 may be provided within the EV charger cable management system 1 and placed in the load panel 5 upon installation of the EV charger cable management system 1.
The junction box 11 is further structured to be affixed to (e.g., without limitation, mounted on, bolted to, etc.) a portion of a top surface (e.g., without limitation, of a ceiling 2) of the EV charging facility 10 via the bracket 12, and maintain a majority of the EV charger cord set 13 to be suspended overhead and out of a path or line of movement of a user, the public or an EV6 based on such affixing of the junction box 11 at the top surface of the EV charging facility 10. The junction box 11 is structured to be mounted on the ceiling 2 of the EV charging facility 10 via the bracket 12. As shown in
In operation, the user reaches out and grabs the EV connector 15 from the passive holding component 17. The user next connects the EV connector 15 to the EV 6 for charging. Upon completion of the charging, the user then returns the EV connector 15 to the passive holding component 17 for storage.
The EV charger cable management system 1 is novel in that the conventional EVSEs (e.g., without limitation, EV charging stations or charge points) are installed on a wall or a pedestal, requiring the entirety of the EV charger cable and the connector to be wound on a hook disposed on the wall or the pedestal. Due to the required cable length (25 ft from an EV charger) under the standards, the full length of the EV charger cable remains exposed to a path or line of movement of the user and/or the EV during use and storage, leaving the EV charging cord set exposed to damages or dirt and the user prone to tripping hazards. By affixing the junction box 11 to the ceiling 2 of the EV charging facility 10, the inventive EV charger cable management system 1 isolates the majority (e.g., more than one half of length of the EV charger cable 14) of the EV charger cable 14 and the EV connector 15 from the path or line of movement of the user and/or the EV 6, thereby safeguarding the EV charger cord set 13 from damages and protecting the user from any tripping hazards.
Further, by allowing the junction box 11 (and its accessories (e.g., a retractor 20, a trolley mechanism 30, etc. as shown in
In addition, by allowing connection capability (e.g., without limitation, the electrical and communications wirings) to the EV charger circuit breaker 4 that can be installed in a remote load panel, when the load panel 5 is remotely located, the EV charger cable management system 1 is not limited by reduced length of the EV charger cable 14. Rather, it allows the user to still utilize the full length of the EV charger cable 14, thereby allowing charging of an EV 6 parked further away from the junction box 11 in a larger EV charging facility (e.g., a commercial parking garage). Furthermore, in an example involving an outdoor EV charging facility in which public foot traffic around an EV 6 may pose a concern, the EV charger cable management system 1 allows for a less to no-space being taken upon on the footpath as shown in
The retractor 20 includes a fixing component 22, a retractor cord 23 and a cord grip 24. The retractor 20 may be, e.g., without limitation, a spring-loaded device and further include a locking mechanism (not shown) and a core which holds, e.g., without limitation, approximately 8 ft of the retractor cord 23. The retractor cord 23 may be, e.g., without limitation, a steel cable. The retractor 20 is structured to be affixed to the ceiling 2 at one end via the fixing component 22 and attached to the retractor cord 23 at another end, grip one end of the majority 29 of the EV charger cord set 13 via the cord grip 24 attached to the retractor cord 23, raise the EV connector 15 to a first height for storage (as shown in
The fixing component 22 may be, e.g., without limitation, an eye bolt and structured to affix the one end of the retractor 20 to a portion of the ceiling 2 apart (e.g., without limitation, by a width of an EV) from the part of the ceiling 2 to which the junction box 11 is affixed. The cord grip 24 is attached to an end of the retractor cord 23 and is structured to grip the one end of the remaining portion 28 of the EV charger cord set 13, the remaining portion 28 having the EV connector 15 at another end such that the second portion 28 is ensured to remain overhead free from an unintended contact with the user (e.g., accidentally bumping into the user's head) or the EV 6.
The cord holder 21 includes a fixing component 25 and a strain relief 26. The cord holder 21 is structured to be affixed to the ceiling 2 via the fixing component 25 and maintain the majority 29 of the EV charger cord set 13 to be suspended overhead and out of a path or line of movement of the user or the EV 6 via the strain relief 26. The fixing mechanism 25 may be, e.g., without limitation, an eye bolt, and structured to affix the cord holder 21 to a portion of the ceiling 2 transversely spaced-apart (e.g., without limitation, equidistant) from the junction box 11 and the retractor 20. The strain relief 26 may be a plate (e.g., without limitation, thermoset plate) having an aperture at the top, the aperture being structured to conduit the majority 29 of the EV charger cord set 13 extending from the junction box 11 to the one end of the remaining portion 28 of the EV charger cord set 13 and hold a point of the majority 29 so as to provide a strain relief to the junction box 11 and the retractor 20 by further distributing the stress of holding the EV charger cord set 13 over the plate. The strain relief 26 is further structured to provide a space in which the majority 29 of the EV charger cord set 13 is allowed to rotate or turn so as to prevent the EV charger cord set 13 from binding or becoming entangled.
In operation, the user reaches out and grabs the EV connector 15. The user next unlocks the retractor 20 by exerting a small downward force (e.g., without limitation, a tug or pull) against the retractor 20. Upon receiving the downward force, the retractor 20 unlocks the locking mechanism and releases the retractor cord 23 such that the EV connector 15 is lowered to the second height based on a user input (e.g., without limitation, another tug or pull). The user next connects the EV connector 15 to the EV 6 for charging. Upon completion of the charging, the user then locks the retractor 20 by exerting the downward force again. Upon receiving the downward force, the retractor 20 retracts the retractor cord 23 and raises and maintains the EV connector 15 at the first height until a next charging session.
Thus, each component of the EV charger cable management system 1′, i.e., the retractor 20, the cord holder 21 and the junction box 11, ensure that the EV charger cord set 13 is maintained off the ground and isolated from any unintended contact with the user or the EV 6 when the EV connector 15 is not connected to the EV 6, such that potential damages and/or tripping hazards are eliminated.
The one or more holding cords 34A-D each are attached to corresponding trolleys 31A-D at one end and extend downwardly by a length 41. The length 41 may be adjustable by the user. The one or more cord grips 33A-D each are attached to the one or more trolleys 31A-D via corresponding holding cords 34A-D. A cord grip 33A-D may be made of, e.g., without limitation, thermoset. Each cord grip 33A-D is structured to provide an aperture via which the EV charger cord set 13 is looped around and further structured to grip one end of corresponding holding portion 36-39 of the EV charger cord set 13. As such, a first trolley 31A holds a first loop formed by the first holding portion 36 and a corresponding cord grip 33A, a second trolley 31B holds a second loop formed by the second holding portion 37 and a corresponding cord grip 33B, a third trolley 31C holds a third loop formed by the third holding portion 38 and a corresponding cord grip 33C, and a fourth trolley 31D holds a fourth loop formed by the fourth holding portion 39 and a corresponding cord grip 33D. The last portion 40 is suspended off the ground such that the EV connector 15 is suspended at a height convenient for charging the EV 6. A holding cord 34A-D may be, e.g., without limitation, a braided nylon rope structured to hold the corresponding holding portion 36-39. Thus, the one or more trolleys 31A-D, the one or more cord grips 33A-D the one or more holding cords 34A-D, and the junction box 11 together hold the majority (the holding portions 36-39) of the EV charger cord set 13 at a predetermined height and maintain the remaining portion of the EV charger cord set including the EV connector 15 suspended off the ground at all times. The predetermined height may be the height at which accidental contacts between the majority of the EV charger cord set 13 and the user or the EV are prevented. It may be set by the user at installation in accordance with the user need or preference.
The one or more trolleys 31A-D are structured to travel via the one or more trolley tracks 32A-D based on a user input. The user input includes, e.g., without limitation, pulling the EV connector 15 or the last portion 40 of the EV charger cord set 13 including the EV connector 15 towards the EV connector receptacle 6A or 6B for charging and pushing the EV connector 15 or the last portion 40 back towards the junction box 11 for storage. As such, in operation, the user reaches out and grabs the last portion 40 or the EV connector 15. The user next pulls the last portion 40 or the EV connector 15 toward the EV connector receptacle 6A or 6B. The one or more trolleys 31A-D travel away from the junction box 11 toward the EV connector receptacle 6A or 6B within respective trolley tracks 32A-D as shown in
Thus, by positioning the trolley mechanism 30 on the ceiling 2, the EV charger cord set 13 may be coiled up against a side wall (near the junction box 11) for storage in an orderly manner when it is not in use, and extend to the EV connector receptacle 6A or 6B of the EV 6 when it is in use for convenient charging, while keeping the majority of the EV charger cord set 13 suspended overhead and the EV connector 15 off the ground at all times, and thus preventing damage to the EV charger cord set 13 and/or tripping hazards to the user. Further, by allowing the EV charger cable management system 1′″ at any appropriate location, it allows the user the flexibility to charge an EV 6 as parked. For example, by allowing to preferably affix the junction box 11 and the trolley mechanism 30 at the location 2C between the two parking spots within the 2-car garage 10 as shown in
While specific embodiments of the invention have been described in detail, it will be appreciated by those skilled in the art that various modifications and alternatives to those details could be developed in light of the overall teachings of the disclosure. Accordingly, the particular arrangements disclosed are meant to be illustrative only and not limiting as to the scope of disclosed concept which is to be given the full breadth of the claims appended and any and all equivalents thereof.