SE535382C2 - Electricity supply system for charging batteries on a parking area. - Google Patents

Abstract

SUMMARY An electrical supply system (45) comprising a parking surface (13) pre-charging batteries for a plurality of electric vehicles comprising a plurality of electrical outlets (12) connected by cables (11) to a low voltage switchgear (8). Each electrical socket (12) comprises a single-cable protection module (41), a post (35) anchored in the cable protection module, and a connection module (36) carried by the post. (Fi9 1)

Description

20 25 30 535 382 2 By US 2007/0126395 (Suchar) an automatic charging and docking station for electric cars is previously known. The known station is intended to be located in public or private places and comprises a probe carried by the vehicle which is brought into contact with the station during charging. The probe contains an identity carrier that allows the owner to be invoiced afterwards.

US 5,548,200 (Nor et al) discloses a universal charging station for charging batteries for electric cars. The task of the charging station is to allow the transfer of electrical energy to a battery as quickly as possible. The problem that the charging station seeks to overcome is that drivers do not have to wait several hours or overnight to get their car charged. The known station comprises a rectifier which supplies a plurality of charging sockets with direct current. In this case, vehicles and stations are arranged to communicate with each other to control the charging phase.

DISCLOSURE OF THE INVENTION The object of the invention is to provide ways to provide a system for supplying electricity to a plurality of temporarily parked electric vehicles which offer safe handling for the users.

This object is achieved according to the invention of an electricity supply system according to the features specified in the characterizing part of independent claim 1 and by a method according to the features specified in the independent part of claim 10. Advantageous embodiments are set out in the characterizing parts of the dependent claims.

According to the invention, the electricity supply system comprises a cable protection and a plurality of electrical outlets. The electrical sockets comprise a pole and a connection unit placed thereon. The post is supported by the cable cover and is so attached to it that the post can be adjusted to assume a vertical position.

The cable guards are attached to a parking area with several connections.

Suitable joints can be nail or screw joints, or adhesive joints.

The cable cover protects a number of electrical cables that are connected between the electrical sockets and a switchgear.

By placing the cable guards on top of the ground, digging is avoided.

The system thus becomes less costly. The system also becomes more flexible because the cable protection is made up of modules that can be easily moved with the right tools. The cable protection also forms the foundation for the posts, which is why they do not need to be buried either. In one embodiment, a number of sockets are arranged on each connection unit. Preferably, the electrical outlets constitute ordinary single-phase outlets for 230 V. In other countries, other voltage levels can be applied. The invention also includes three-phase electrical outlets.

The electricity supply system also includes a control and payment system. A credit card payment facility is arranged in a control unit. The control unit can comprise a separate control module or be housed in the switchgear or in the connection unit. Alternatively, the electricity supply system is set up with a function with identification of car or driver to be able to send an invoice afterwards. In one embodiment, the fee is paid by text message or other payment method via telephone subscription, or other equivalent payment method.

According to a first aspect of the invention, the object is achieved by a power supply system for charging batteries to a plurality of electric vehicles comprising a plurality of electrical outlets connected by cables to a low voltage switchgear, each electrical outlet comprising a pole and a connection module carried by the pole. The cables are then routed directly on 10 15 20 25 30 535 382 4 ground and covered with a cable cover. The cable protection comprises a number of modules which are fastened to the ground surface with fastening means. Each module forms the foundation for at least one electrical outlet.

In one embodiment, each connection module contains a plurality of sockets for electrical connection of each electric car. In one embodiment, the electricity supply system contains a control module for measuring, controlling and paying for the electricity supply service. In one embodiment, this control module is housed in the connection module. In one embodiment, an electricity meter is housed in the connection module in the event that the car owner rents a parking space for the long term.

The electricity meter can be read remotely and the driver is charged, for example, for electricity consumption once a month.

According to a second aspect of the invention, the object is achieved by a method for charging batteries to a plurality of electric vehicles with a power supply system comprising a plurality of electrical outlets connected by cables to a low voltage switchgear, each electrical outlet comprising a post and a post-carried connection module. The method comprises the following steps: laying the cables directly on the ground, covering the cables with a cable cover comprising a plurality of modules, attaching the modules with fasteners to the ground surface, and fixing a post to at least one module which thus forms the foundation for the electrical outlets.

DESCRIPTION OF THE DRAWINGS The invention will be explained in more detail by describing exemplary embodiments with reference to the accompanying drawings, in which Fig. 1 is a power supply system for charging batteries for temporarily parked electric vehicles, and Fig. 2 is a schematic system for power supply of a plurality of electric vehicles according to the invention in which power supply systems are included.

DESCRIPTION OF EMBODIMENT EXAMPLES An embodiment of an electricity supply system with a plurality of electrical outlets for connection to a plurality of electric cars is shown in Figure 1. A cable cover 30 which in the example shown is formed with a crescent-shaped casing of a durable material. The protection must withstand, among other things, injury and collision. The cable cover can consist of a plurality of modules 41 which are joined together with joints 31 and fastened to the base with external fastening devices 32. In one embodiment the cable cover is fastened with an inner fastening device 33. The fastening devices can be fastened to the base with screw or nail connection . By attaching the cable cover to the parking surface, digging is avoided, which results in a cost saving.

In the example shown, the cable guards form the foundation for a plurality of posts 35, each of which carries its own connection module 36 with at least one socket. In one embodiment, the connection module contains at least four sockets. Each post is provided with an adjusting device 37 with which the post is adjustable to a vertical position. In one embodiment, the connection module has two outlets covered, each with a lockable door 38. The example shown also contains a payment and control module 39 through which a customer can pay or identify himself with, for example, a credit card. In one embodiment, the low voltage switchgear 8 and the control module 39 are housed in the same housing. The module also contains means for wireless communication, with which the electrical outlets can be controlled or information obtained from, for example, a mobile phone. In the example shown, an electrical outlet contains a reader 40 for a credit card or the like, whereby the payment and control module can be omitted. 10 15 20 25 30 535 382 6 The electrical sockets 12 are designed with one or a number of socket luminaires and a device for controlling both charging current and any additional heat in the car. In one embodiment, the electrical outlet is de-energized as long as no plug is in the outlet. This is to prevent fingers from touching live parts of the socket and to prevent uncontrolled power consumption. When the plug is plugged into the socket and the power supply is activated by the driver, voltage is switched on at the same time as a locking device prevents the socket from being plugged out or access to the electrical sockets. The system is designed so that locking devices release in the event of a general power failure.

The driver activates the charge by using a key lock, credit card, SMS code, code lock or other device. This can be done with the help of a mobile phone or with an activation machine 39. Simultaneously with the activation, measurement is started as a basis for charging for the common parking and charging service. The measurement, which can consist of time measurement, energy measurement or both, is terminated when the connection is deactivated by the driver. Debiting takes place through invoicing via the telephone bill or in a similar way or by withdrawal on a credit card. The heat outlet can be activated by means of SMS and mobile phone, timer or in a similar way.

In one embodiment, the electricity supply system is arranged in an existing parking space. The cable guards are laid out on the existing ground surface and the posts with the socket units are attached to the cable guards. As the ground surface can sometimes tilt slightly, the posts are adjusted to a vertical position.

From the transformer, cables 11 are routed via the low-voltage switchgear to the respective electrical sockets 12. To avoid being forced to bury the cables in the ground, these are placed directly on the ground surface and protected with the cable protection 30. The fasteners 32 are adapted for asphalt or other ground coverings. 10 15 20 25 30 535 382 7 The facility according to figure 2 is intended for an infrastructure such as electricity supply, metering, control and payment systems for charging electric and electric hybrid cars in connection with them being parked in a parking lot.

Since the power output is quite large from each car and it takes less than 5 - 6 hours to charge a battery, there is usually no possibility to draw power supply from the nearest power station. On the one hand, there is usually no capacity and on the other hand, the low-voltage cables become long and thus both expensive and encumbered with large losses. According to the invention, the system is designed so that the electrical pressure point, the transformer, comes in direct connection with the car park.

Power supply is obtained by connecting a high-voltage switchgear 1 with a T-branch in a suitable place in a permanent cable-fed network station loop 2. Usually such a connection is 10 or 24 kv.

The connection point is chosen so that a minimum distance is obtained but also so that a suitable room is obtained where the switchgear can be installed in collaboration with nature. The switchgear contains a switch 3 for switching on and off and a device 4 for tripping the switch in the event of a power failure. The special design of the T-branch means that its outer dimensions are limited and that it can thus be set up without a building permit.

From a high-voltage switchgear 1, a radially discharging cable 5, which is intended for 10-36 kV, goes to a transformer housing 6 which is advantageously placed underground as it thus does not steal existing ground surface nor does it change or disturb the environment aesthetically. A distribution transformer 7 is normally placed in the box, normally with rated data 10-36 / 0.4 kV.

The low voltage side of the transformer supplies a low voltage switchgear 8 with a plurality of switches 9 which are placed in a housing. The enclosure can be designed in the same way as the cable cabinets that normally occur today. Connected to the housing 535 382 is a ventilation device 10 which comprises one or more fans for ventilating the heat emitters from the transformer in the transformer housing.

The low-voltage switchgear provides low-voltage cables 11 that supply different rows of electrical outlets 12 placed on poles at a parking surface 13 containing a plurality of parking windows.

Claims (1)

A power supply system for charging batteries to a plurality of electric vehicles arranged on a parking surface (13) comprising a plurality of electrical outlets (12) connected by cables (11) to a low voltage switchgear (8), each electrical outlet (12) comprises a post (35) and a connection module (36) carried by the post, characterized in that the cables are drawn directly on the ground, that the cables are covered with a cable cover (30), that the cable cover comprises a plurality of modules (41) which with fastening means (32) are attached to the ground surface, and that a module (41) forms the foundation for at least one electrical outlet (12). Electricity supply system according to claim 1, wherein the connection module (36) contains a plurality of sockets for electrical connection of each of the electric vehicles. A power supply system according to claim 1 or 2, wherein the connection module (36) comprises a locking device (38). A power supply system according to claim 3, wherein the locking device (38) contains a door which can be locked over a connecting member connected in the socket. Electricity supply system according to one of the preceding claims, wherein the connection module (36) contains a control module (39) for checking and paying for the electricity supply service. A power supply system according to any one of the preceding claims, wherein the connection module (36) contains a card reader (40). Power supply system according to any one of the preceding claims, wherein the post (35) is attached to the cable protection module (41) with an adjusting device (37) with which the post is adjustable to a vertical position. A method of charging batteries to an electric vehicle with an electricity supply system according to claim 1, characterized by connecting a user's electric car to an electrical outlet (12), identifying the user at a control unit (39) included in the electricity supply system. , locking the connection means to the socket with a locking device (38) arranged at the socket (12), and providing power. A method according to claim 8, wherein after completion of charging, the user re-identifies himself at the control unit (39), the power is interrupted, and the locking device (38) is opened so that the connection can be disconnected. A method of manufacturing a power supply system for charging batteries to a plurality of electric vehicles arranged on a parking surface (13) comprising a plurality of electrical outlets (12) connected by cables (11) to a low voltage switchgear (8), each electrical outlet (12) comprising a post (35) and a connection module (36) carried by the post, characterized by laying the cables directly on the ground, covering the cables with a cable cover (30) comprising a plurality of modules (41), attaching the modules with fastening means (32) to the ground surface, and fi xering of a post (35) to at least one module (41) which thus forms the foundation for the electrical outlets (12). Use of a power supply system according to claims 1-7, or a method according to claim 8-9, for charging batteries to a temporarily parked electric vehicle.