Charging station for electric vehicle traction batteries

Abstract

The present solution relates to charging devices, and more particularly to a charging station for charging electric vehicle traction batteries. The charging station for electric vehicle traction batteries is characterized in that it contains, mounted inside a housing and connected to one another, a remote-controlled three-phase voltage switch for providing overcurrent protection and acting as a circuit breaker, a three-phase isolation transformer, a thyristor-controlled rectifier, an L-type LC filter, a switch, a current and voltage meter, and a control unit. The technical result consists in faster charging of an electric vehicle traction battery at the required charging current according to commands from the battery controller, while at the same time protecting the battery against overcharge.

Description

[0001] Charging station for traction batteries of electric vehicles

[0002] The field of technology to which the solution relates

[0003] The solution relates to charging devices, namely, it is designed to charge traction batteries of electric vehicles.

[0004] State of the art

[0005] A device for charging an electric vehicle battery is known from the prior art (RU217629U1, 10.04.2023). The device includes a vandal-proof housing, into which a contactor with a connector for connecting the charging cable of an electric vehicle is built in, a lower-level controller connected to the contactor, configured to turn on and off the voltage supply, as well as transmit a control signal to the electric vehicle, and an upper-level controller configured to generate information on the amount of energy consumed, with a built-in current sensor and a GSM module configured to transmit data on the measured values ​​​​to the cloud, wherein the upper-level controller is connected via a power supply to a dynamic control unit according to a time schedule, configured to disconnect the load during peak load hours of the main network and upon reaching a specified level of energy consumption by the main subscriber,and when the load of the main subscriber increases, the dynamic control unit is a built-in power limiter, designed with the ability to limit the load when the consumer exceeds a specified power level in accordance with the selected operating algorithm.

[0006] The disadvantages of this solution are the impossibility of quickly charging the electric vehicle battery with the required charging current and protection against overcharging the battery.

[0007] The claimed device allows to substantially overcome the above-mentioned shortcomings inherent in existing analogs. Disclosure of the essence of the solution

[0008] The task solved by the proposed technical solution is to create a charging station that provides fast charging of the electric vehicle battery with the required charging current in accordance with the commands of the battery controller, capable of being powered from high-voltage lines without additional step-down devices, with increased safety, protecting the battery from overcharging.

[0009] The technical result consists in increasing the charging speed of an electric vehicle battery with the required charging current in accordance with the commands of the battery controller and simultaneously protecting it from overcharging.

[0010] The technical result is achieved due to the fact that the charging station for traction batteries of electric vehicles contains a remotely controlled three-phase voltage switch with an overcurrent protection function and an RCD, a three-phase isolation transformer, a thyristor rectifier, an L-shaped LC filter, a switch, a current and voltage meter, and a control unit, installed in a housing and connected to each other.

[0011] In addition, the charging station is designed with the possibility of combining the outputs of switches of several charging stations in series and in parallel.

[0012] In addition, the control unit is designed with the ability to exchange information with control units of other charging stations.

[0013] In addition, the control unit contains a threshold device.

[0014] Brief description of the drawings

[0015] Fig.1 - Block diagram of the charging station.

[0016] The following positions are indicated by numbers on the figures:

[0017] 1 - remotely controlled three-phase voltage switch; 2 - three-phase isolation transformer; 3 - thyristor rectifier; 4 - L-shaped LC filter; 5 - switch; 6 - current and voltage meter; 7 - battery; 8 - control unit. Implementation of the solution

[0018] The declared charging station for traction batteries of electric vehicles is a modular station based on an isolating transformer and a thyristor rectifier connected according to the Larionov scheme. By connecting several modules of charging stations in series and in parallel, it is possible to achieve the required charging current or maximum charging voltage and, accordingly, ensure the required speed.

[0019] The charging station contains (Fig. 1) a remotely controlled three-phase voltage switch 1 with an overcurrent protection function and an RCD, a three-phase isolation transformer 2, a thyristor rectifier 3, an L-shaped LC filter 4, a switch 5, a current and voltage meter 6, and a control unit 8, all connected to each other.

[0020] The elements of the device can be installed in a case or assembled as a single structure (i.e. not necessarily inside the case, maybe just on a chassis or panel, but in a single design).

[0021] The control unit includes a threshold device that protects the battery from overcharging, which can be implemented in software or hardware.

[0022] The battery 7 is not included in the device and is an external device.

[0023] By using a three-phase isolating transformer 2, galvanic isolation of the load from the primary power source is ensured, which increases safety. Also, using a three-phase isolating transformer 2 allows power supply from high-voltage lines without additional step-down devices.

[0024] The presence of an isolating transformer 2 allows the outputs of switches 5 of several charging stations to be combined in series and in parallel to ensure the required charging current and maximum charging voltage, and the digital control unit 8 allows information to be exchanged with control units of other charging stations to ensure synchronized operation.

[0025] Remotely controlled three-phase voltage switch 1 with overcurrent protection and RCD function, on command from control unit 8 supplies power to three-phase isolation transformer 2. Galvanically isolated three-phase voltage from the output windings of the transformer is supplied to the input of thyristor rectifier 3 controlled by control unit 8. Rectified voltage is supplied to the input of L-shaped LC filter 4. Due to the difference in voltage on filter 4 and storage battery 7, charging current flows through switch 5 controlled by control unit 8. Voltage of storage battery 7 and charging current are monitored by current and voltage meter 6. Information from meter 6 is supplied to control unit 8, thereby closing the feedback loop on voltage and current of the storage battery. Control unit 8 communicates via an external protocol with the storage battery controller (not shown in the diagram).The control unit 8 directly controls the current and voltage of the battery via the meter 6, and from the controller the battery receives the required charging current setting and the command to end the charge and controls other available telemetry parameters.

[0026] The charging station designed in the manner described above ensures fast charging of the electric vehicle battery with the required charging current in accordance with the commands of the battery controller, has the ability to be powered from high-voltage lines without additional step-down devices, has increased safety of use, and also protects the battery from overcharging.

Claims

CLAUSES OF THE INVENTION 1. A charging station for traction batteries of electric vehicles, characterized by the fact that it contains a remotely controlled three-phase voltage switch with an overcurrent protection function and an RCD, a three-phase isolation transformer, a thyristor rectifier, an L-shaped LC filter, a switch, a current and voltage meter, and a control unit, all connected to each other.

2. A charging station for traction batteries of electric vehicles according to paragraph 1, characterized in that it is designed with the possibility of combining the outputs of switches of several charging stations in series and in parallel.

3. A charging station for traction batteries of electric vehicles according to paragraph 1, characterized in that the control unit is designed with the ability to exchange information with control units of other charging stations.

4. A charging station for traction batteries of electric vehicles according to paragraph 1, characterized in that the control unit contains a threshold device.

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