FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
AND
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
(See Section 10; rule 13)
TITLE OF THE INVENTION CHARGING OF ELECTRIC VEHICLES
APPLICANT (S)
TATA MOTORS LIMITED
Bombay House, 24 Homi Mody Street,
Hutatma Chowk, Mumbai 400 001,
Maharashtra, India;
an Indian Company
PREAMBLE TO THE DESCRIPTION
The following specification particularly describes the invention and the manner in which it is to be performed.

FIELD OF THE INVENTION
[0001] The present invention relates to electric drive systems including hybrid and electric vehicles, and more specifically related to a charging control system and method for charging an electric vehicle simultaneously using more than one charger.
BACKGROUND OF THE INVENTION
[0002] Electric motor vehicles, such as plugin hybrid vehicles and battery electric vehicles, are equipped with rechargeable secondary traction batteries that output electric power for driving rotary electric machines, and store electric power generated by the rotary electric machines or electric power charged from an external electric power source. The electric vehicle includes traction batteries that are to be charged to enable running of the electric vehicle. The charging of the traction batteries consumes a significant amount of time. A fast charging of the traction batteries is desirable, as that would result in a greater uptime of the vehicle. Even though several techniques to increase the rate of charging are available, the charging still takes a significant amount of time, such as in the range of 2-5 hours.
[0003] Hence there remains a need for an improvised design and power operation for charging the traction batteries faster.
SUMMARY OF THE INVENTION
[0004] In one aspect a charging control system for charging an electric vehicle is provided. The charging control system includes a first contactor to connect a first set of traction batteries of the vehicle with a first charging port, a second contactor to connect a second set of traction batteries of the vehicle with a second charging port, and a third contactor to allow connection of the first set of traction batteries with the second charging port through the second contactor and to allow connection of the second set of traction batteries with the first charging port through the first contactor.

[0005] In another aspect a vehicle with charging control system is provided. The vehicle includes a first set of traction batteries, a second set of traction batteries, a first contactor connected to the first set of traction batteries and to be connected to a first charging port, a second contactor connected to the second set of traction batteries and to be connected to a second charging port, and a third contactor connected to the first set of traction batteries and the second set of traction batteries, to be connected to the first charging port through the first contactor, and to be connected to the second charging port through the second contactor.
[0006] In yet another aspect a method for controlling charging of a first set of traction batteries and the second set of traction batteries of a vehicle is provided. The method includes receiving an indication that charging of the first set of traction batteries and the second set of traction batteries are to happen both from a first charging port and a second charging port, through a first contactor and a second contactor, wherein the first contactor connects the first set of traction batteries with the first charging port, the second contactor connects the second set of traction batteries with the second charging port, and a third contactor is connected to the first set of traction batteries and the second set of traction batteries, is connected to the first charging port through the first contactor, and is connected to the second charging port through the second contactor. The method includes monitoring state of the second contactor and allowing charging to happen from the first charging port through the first contactor in response to the second contactor being closed.
[0007] These and other aspects of the embodiments herein will be better appreciated and understood when considered in conjunction with the following description and the accompanying drawings. It should be understood, however, that the following descriptions, while indicating preferred embodiments and numerous specific details thereof, are given by way of illustration and not of limitation. Many changes and modifications may be made within the scope of the embodiments herein without departing from the scope thereof, and the embodiments herein include all such modifications.

BRIEF DESCRIPTION OF DRAWINGS
[0008] The proposed charging control system and method are illustrated in the accompanying drawings, throughout which like reference letters indicate corresponding parts in the various figures. The embodiments herein will be better understood from the following description with reference to the drawings, in which:
[0009] FIG. 1 illustrates an charging control system to control charging of traction batteries of a vehicle, according to embodiments as disclosed herein; and [0010] FIG. 2 illustrates a method for controlling charging of a first set of traction batteries and the second set of traction batteries of a vehicle, according to embodiments as disclosed herein.
[0011] It may be noted that to the extent possible, like reference numerals have been used to represent like elements in the drawing. Further, those of ordinary skill in the art will appreciate that elements in the drawing are illustrated for simplicity and may not have been necessarily drawn to scale. For example, the dimension of some of the elements in the drawing may be exaggerated relative to other elements to help improve the understanding of aspects of the invention. Furthermore, the one or more elements may have been represented in the drawing by conventional symbols, and the drawings may show only those specific details that are pertinent to the understanding the embodiments of the invention so as not to obscure the drawing with details that will be readily apparent to those of ordinary skill in the art having benefit of the description herein.
DETAILED DESCRIPTION OF THE INVENTION
[0012] The embodiments herein and the various features and advantageous details thereof are explained more fully with reference to the non-limiting embodiments that are illustrated in the accompanying drawings and detailed in the following description. Descriptions of well-known components and processing techniques are omitted so as to not unnecessarily obscure the embodiments herein. Also, the various

embodiments described herein are not necessarily mutually exclusive, as some embodiments can be combined with one or more other embodiments to form new embodiments. The term "or" as used herein, refers to a non-exclusive or, unless otherwise indicated. The examples used herein are intended merely to facilitate an understanding of ways in which the embodiments herein can be practiced and to further enable those skilled in the art to practice the embodiments herein. Accordingly, the examples should not be construed as limiting the scope of the embodiments herein.
[0013] Referring now to the drawings, and more particularly to FIGS. 1 through 2, where similar reference characters denote corresponding features consistently throughout the figures, there are shown preferred embodiments.
[0014] FIG. 1 illustrates a charging control system (100) for charging an electric vehicle simultaneously using more than one charger, according to embodiments as disclosed herein. The charging control system (100) includes a plurality of traction batteries (1011-n), a plurality of charging ports (1021-n), a plurality of junction boxes (1031-n), a plurality of contactors (1041-n), and a controller (109).
[0015] Each of the charging ports (1021-n) is connected to different chargers to receive electric current for simultaneously charging the plurality of traction batteries (l011-n). The plurality of junction boxes (1031-n) is connected to the plurality of charging ports (1021-n) using a plurality of contactors (1041-n). The first contactor (1041) connects to a first set of traction batteries (1011, 1012) and with a first charging port (1021). The second contactor (1042) connects to a second set of traction batteries (1013, 101n) with a second charging port (1022). The third contactor (1043) allows connection of the first set of traction batteries (1011, 1012) with the second charging port (1022) through the second contactor (1042) and allows connection of the second set of traction batteries (1012) with the first charging port (1021) through the first contactor (1041).

[0016] The plurality of junction boxes (1031-n) connected with each other to control flow of the electric current from the different chargers to the plurality of charging ports (1021-n) using the plurality of contactors (1041-n). The controller (109) is connected to the plurality of junction boxes (1031-n) for detecting position of the plurality of contactors (1041-n) and operate the charging control system (100) in a single-gun charging mode or a dual gun charging mode for simultaneously charging the plurality of traction batteries (1011-n).
[0017] In an embodiment, the controller (109) is configured to receive an indication that charging of the first set of traction batteries and the second set of traction batteries are to happen both from the first charging port (1021) and the second charging port (1022), through the first contactor (1041) and the second contactor (1042). Further, the controller (109) is configured to monitor state of the second contactor (1042) and allow charging to happen from the first charging port (1021) through the first contactor (1041) in response to the second contactor (1042) being closed.
[0018] For illustration purpose, a limited number of traction batteries, charging ports, junction boxes, and contactors are shown. Any number of traction batteries, charging ports, junction boxes, and contactors can be used as per the requirements.
[0019] In an embodiment, the plurality of charging ports (1021-n) includes a first charging port (1021) and a second charging port (1022). The first charging port (1021) is connected to traction batteries (1011-2). The first charging port (1021) receives the electric current from a first charger associated with a first charging gun, and charges the traction batteries (1011-2) connected to the first charging port (1021).
[0020] The second charging port (1022) is connected to the traction batteries (1013-n). The second charging port (1022) receives the electric current from a second charger associated with a second charging gun, and charges the traction batteries (1013-n) connected to the second charging port (1022).

[0021] In an embodiment, the plurality of junction boxes (1031-n) includes a first junction box (1031), a second junction box (1032), and a third junction box (1033). The first junction box (1031) is connected to a first battery cooling system (1051), a HVAC (heating, ventilation, and air-conditioning) system (106) and the at least one battery associated with the first charging port (1021). The first junction box (1031) controls the flow of the electric current to the HVAC system (106) and the first battery cooling system for the at least one battery (1011, 1012) associated with the first charging port (1021).
[0022] The second junction box (1032) is connected to the first junction box (1031), the first charging port (1021), a traction system (107) and an auxiliary system (108). In an embodiment, the second junction box (1032) includes a first contactor (1041) of the plurality of contactors (1041-n) to receive the electric current from the first charger through the first charging port (1021), and control the flow of the electric current to the traction system (107) and the auxiliary system (108) (such as steering pump, air compressor, lamps via power electronic converters). In an example, the second junction box, and the first contactor may be connected to the first set of traction batteries (1011) and (1012) through the first junction box, as illustrated.
[0023] The third junction box (1033) is connected to the second charging port (1022), the at least one battery associated with the second charging port (1022) and a second battery cooling system. the at least one battery associated with the second charging port may include the second set of traction batteries (1013) and (101n). In an embodiment, the third junction box (1033) includes a second contactor (1042) connected to the second charging port (1022) and the third contactor (1043) connected to the first contactor (1041). The second contactor may connect the second charging port with the second set of traction batteries. Further, the third contactor may enable electrical connection between the second contactor 104-2 and the first contactor (1041). the second contactor (1042) receives the electric current from the second charger through the second charging port (1022), and controls the flow of the electric current to the battery cooling system and the at least one battery associated with the second charging port (1022). The third contactor (1043) controls the flow of the

electric current between the first junction box (1031) and the second junction box (1032).
[0024] As an example, when the third contactor (1043) is closed and the first contactor (1041) is opened, the electric current flowing through the second charging port (1022) can charge all the four traction batteries. When the third contactor (1043) is kept open and charge is supplied from both the charging ports, the traction batteries (1011-2) may get charged with the electric current flowing through the first charging port (1021) and the traction batteries (1013-n) may get charged with the electric current flowing through the second charging port (1022). Thus, as will be evident, by controlling the positions of the contactors (1041-3), the charging and discharging of the various traction batteries and the charging of the traction batteries through the various charging ports can be controlled. The simultaneous charging using current flowing through both the charging ports (1021-2) may also be referred to as dual-gun charging, as one charging gun each is plugged into the first and the second charging ports (1021-2).
[0025] The below truth table illustrates the charging under various modes:

Mode of Charging 1041 1042 1043
Single-gun Charging via charging port 1021 On Off On
Single-gun Charging via charging port 1022 Off On On
Dual Gun Charging – Segregated On On Off
Dual Gun Charging - Parallel On On On
Table 1
[0026] The connection of the various electrical loads to the different junction boxes (1031-3) shown herein are examples, and may be modified without departing from the

scope of the present subject matter. For example, the auxiliary electrical loads may be connected to the third junction box (1033), instead of the first junction box (1031).
[0027] In an embodiment, the chargers from which the traction batteries of the electric vehicle receives charge may be part of a same charging enclosure, and may share a power source and a ground. For example, the first charger and the second charger may be part of the same charging enclosure. Accordingly, two charging guns emerging from the same charging enclosure are plugged into the electric vehicle. By utilizing chargers from the same enclosure for charging, it may be ensured that chargers of different voltage values are not plugged into the electric vehicle, thereby preventing a consequent voltage imbalance in the electric vehicle.
[0028] In an embodiment, the controller (109) operate the charging control system (100) in the single-gun charging mode or the dual-gin charging mode based on position of the contactors (1041-3) as shown in the above Table-1.
[0029] In the single-gun charging mode, the controller (109) simultaneously charges all the plurality of traction batteries (1011-n) using the electric current received either from the first charging port (1021) or the second charging port (1022). In an embodiment, the controller (109) operate the charging control system (100) in the single-gun charging mode when the first and third contactors (1041, 1043) are in ON position, and the second contactor (1042) is in OFF position. In an embodiment, the controller (109) operate the charging control system (100) in the single-gun charging mode when the first contactor (1041) is in OFF position, and the second and third contactors (1042, 1043) are in ON position.
[0030] In the segregated dual-gun charging mode, the traction batteries (1021-2) are charged using the charge received through the first charging port (1021), and the traction batteries (1023-n) are charged using the charge received through the second charging port. Accordingly, the first contactor (1041) and the second contactor (1042) are turned ON, while the third contactor (1043) is off. In the case of the dual-gun

charging, all the contactors (104i-3) are turned on, so that charge received through both the ports may reach all traction batteries of the electric vehicle.
[0031] In the dual-gun charging mode, the controller (109) charge the at least one battery connected to the first charging port (1021) using the electric current received from the first charging port (1021), and simultaneously charge the at least one battery connected to the second charging port (1022) using the electric current received from the second charging port (1022). In an embodiment, the controller (109) operate the charging control system (100) in the dual gun charging mode when the first and second contactors (1041, 1042) are in ON position, and the third contactor (1043) is in OFF position. In an embodiment, the controller (109) operate the charging control system (100) in the dual gun charging mode when the first, second and third contactors (104i-3) are in ON position.
[0032] In the dual gun charging mode, the controller (109) is configured to detect a connection between the first charger and the first charging port (1021), send a signal to close the second junction box (1032) in response to detecting the connection between the first charger and the first charging port (1021), detect a connection between the second charger and the second charging port (IO22), send a signal to close the third junction box (1033) in response to detecting the connection between the second charger and the second charging port (1022), detect whether both the first charging port (102i) and the third charging port are in synch when both the first contactor (1041) and the second & third contactors (1042-3) are in ON position, send a signal to the first charger and the second charger indicating that the traction batteries are ready for charging when both the first charging port (1021) and the second charging port (1022) are in synch, detect that both the first charger and the second charger are ready for charging, charge the at least one battery connected to the first charging port (1021) using the electric current received from the first charging port (1021), and simultaneously charge the at least one battery connected to the second charging port (1022) using the electric current received from the second charging port (1022).

[0033] FIG. 2 illustrates a method for controlling charging of a first set of traction batteries and the second set of traction batteries of a vehicle, according to embodiments as disclosed herein. The method includes detecting a connection between a plurality of chargers and a plurality of charging ports (1021-n) connected to a plurality of traction batteries (1011-n), determining a synchronization between the plurality of charging ports (1021-n) based on a position of the plurality of contactors (1041-n), configuring the charging control system (100) to operate in one of a single-gun charging mode or a dual gun charging mode based on the synchronization between the plurality of charging ports (1021-n), and simultaneously charging the plurality of traction batteries (1011-n) in the single-gun charging mode or the dual gun charging mode using a plurality of contactors (1041-n) provided in a plurality of junction boxes (1031-n).
[0034] In an embodiment, charging the plurality of traction batteries (1011-n) in the single-gun charging mode includes simultaneously charging all the plurality of traction batteries (1011-n) using the electric current received from one of the plurality of charging ports (1021-n).
[0035] In an embodiment, charging the plurality of traction batteries (1011-n) in the dual-gun charging mode includes sending a signal to the plurality of chargers indicating that the plurality of traction batteries (1011-n) are ready for charging when both the plurality of charging ports (1021-n) are in sync, detecting that the plurality of chargers are ready for charging, charging at least one battery from the plurality of traction batteries (1011-n) connected to the first charging port (1021) using the electric current received from a first charging port from the plurality of charging ports (1021-n), and simultaneously charging at least one battery from the plurality of traction batteries (1011-n) using the electric current received from a second charging port (1022) from the plurality of charging ports (1021-n).
[0036] More particularly, in the case of the dual-gun charging mode, the initiation of charging through the two charging ports (1021-2) is to be synchronized to prevent a voltage mismatch across contactors (1041-3) in the electric vehicle and across the

contactors in the charger. The need for the synchronization is explained with the help of a counter-example. Consider that the first contactor (1041) has closed and the charging through the first charging port (1021) has started and that the third contactor (1043) is closed, while the second contactor (1042) is yet to be closed. In such a case, the voltage at the two terminals of the second contactor (1042) would be different. Subsequently, when the second contactor (1042) is closed, the closing would have to be performed while the two terminals of the second contactor (1042) are at different voltage levels. The differences in the voltages across the terminals of the contactors (1041-3) reduce the life of the contactors. To prevent the differences in the voltages, a synchronization technique is adopted in the present disclosure. An example synchronization technique adopted is explained with reference to the FIG. 2:
[0037] At steps 201a and 201b, the method includes detect the first charging port (102i) and the second charging port (1022).
[0038] At steps 202a and 202b, the method includes detecting charging plug/gun in the first charging port (1021) and the second charging port (1022).
[0039] At steps 203a, the method includes handshaking between the first charger connected to the first charging port (1021) and the electric vehicle. Similarly, at steps 203b, the method includes handshaking between the first charger connected to the second charging port (1022) and the electric vehicle. The first contactor (1041) connects the first set of traction batteries with the first charging port, the second contactor (1041) connects to the second set of traction batteries with the second charging port (1022), and a third contactor (1043) is connected to the first set of traction batteries and the second set of traction batteries, is connected to the first charging port through the first contactor (1041), and is connected to the second charging port (1022) through the second contactor (1042).
[0040] At steps 204a and 204b, the method includes recognising the first charger corresponding to the first charging port (1021) and the second charger corresponding to the second charging port (1022).

[0041] At steps 205a and 205b, the method includes sending a request to close the contactors corresponding to the first charging port (1021) and the second charging port (1022). In an embodiment, an indication that charging of the first set of traction batteries and the second set of traction batteries are to happen both from a first charging port (1021) and a second charging port (1022), through a first contactor (1041) and a second contactor (1042).
[0042] At steps 206a and 206b, the method includes monitoring whether the contactors corresponding to the first charging port (1021) and the second charging port (1022) are closed.
[0043] At steps 207a and 207b, the method includes closing the first junction box (1031) and the third junction box (1033).
[0044] At steps 208, the method includes detecting charging synchronization by allowing charging to happen from the first charging port through the first contactor (1041) in response to the second contactor (1041) being closed. A battery ready signal is sent to the first charger and the second charger. In an embodiment, the controller (109) receives indications of closures of the first contactor (1041) and the second contactor (1042). Upon receiving the indications that charging of the first set of traction batteries and the second set of traction batteries are to happen both from a first charging port (1021) and a second charging port (1022), through a first contactor (1041) and a second contactor (1042), it is determined that the synchronization is achieved, and a signal indicating that the traction batteries are ready for charging is sent to the first charger and the second charger. For example, even if the signal indicating closure of the first contactor (1041) is received before that indicating closure of the second contactor (1042), the signal indicating readiness of the traction batteries is not sent to the first charger. The sending of such a signal is held-off until receipt of the signal indicating closure of the second contactor (1042).
[0045] At steps 209a and 209b, subsequently the method includes detecting the first charger and the second charger is ready for charging the traction batteries.

[0046] At steps 210, the method includes receiving the electric current from the first charger and the second charger and start charging the traction batteries simultaneously. In an example, equal amount of current is demanded from the two chargers.
[0047] In this manner, charging is allowed only after both the first contactor and the second contactor are closed, thereby preventing voltage mismatch across their respective terminals during dual-gun charging. Further, in the case of dual-gun charging, when communication from one of the chargers is not received, the charging process is discontinued. To continue charging in such a case, the charging gun corresponding to the non-communicating charger is to be removed. Subsequently, charging for all the traction batteries may continue from the communicating charger upon restart of charging process.
[0048] In an example, dual-gun charging may be allowed only after ensuring that the voltages at the two charging ports are of substantially same value, thereby preventing a voltage imbalance among the traction batteries. Hence the proposed electric system for the electric vehicles are significantly increases the speed of charging of electric vehicles by simultaneously charging the traction batteries thereby preventing a voltage imbalance among the traction batteries.
[0049] Further, the present disclosure provide a vehicle including a first set of traction batteries of a plurality of traction batteries (1011-n), a second set of traction batteries of the plurality of traction batteries (1011-n), a first contactor (1041) connected to the first set of traction batteries and to be connected to a first charging port (102i), a second contactor (1042) connected to the second set of traction batteries and to be connected to a second charging port (1022), and a third contactor (1043) connected to the first set of traction batteries and the second set of traction batteries, to be connected to the first charging port (1021) through the first contactor (1041), and to be connected to the second charging port (1022) through the second contactor (1042).

[0050] The present subject matter increases the rate of charging of EVs significantly, such as by a factor of two. Thus, charging time of the EVs can be reduced, and the uptime can be increased. Such an increase in the charging rate can be achieved without increasing dimensions of the chargers or charging guns. Further, by synchronizing the charging through the different chargers, damage to contactors of junction boxes is prevented. The simultaneous charging can be achieved in compliance with the standards involved in EV charging, such as GB standards.
[0051] Using the present subject matter, existing low-capacity charger infrastructure can be used for the faster charging of the EVs, without need to procure high-capacity chargers. Further, vehicle charging reliability increased as the vehicle can still be charged with one healthy charging port in case of failure/damage of second charging port. The present subject matter can achieve quick charging of EVs without the need to use complex solutions, such as pantograph and liquid-cooled charging, which require additional infrastructure and vehicle level changes.
[0052] Although the present disclosure is explained with the help of dual charging, the techniques of the present disclosure can be utilized for performing simultaneous charging from more than two chargers as well.
[0053] The foregoing description of the specific embodiments will so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the scope of the embodiments as described herein.

[0054] List to reference numerals:

Sr. No. Description
100 charging control system
1011-n plurality of traction batteries
1011 First battery
1012 Second battery
1013 Third battery
1014 Fourth or Nth battery
1021-n plurality of charging ports
1021 First charging port
1022 Second charging port
1031-n plurality of junction boxes
1031 First junction box
1032 Second junction box
1033 Third junction box
1041-n plurality of contactors
1041 First contactor
1042 Second contactor
1043 Third contactor
1051 First battery cooling system
1052 Second battery cooling system
106 HVAC system
107 traction system
108 auxiliary system
109 Controller

We Claim:
1. A charging control system (100) for charging an electric vehicle, wherein the
charging control system (100) comprises:
a first contactor (1041) to connect a first set of traction batteries of the vehicle with a first charging port (1021);
a second contactor (1042) to connect a second set of traction batteries of the vehicle with a second charging port (1022); and
a third contactor (1043) to allow connection of the first set of traction batteries with the second charging port (1022) through the second contactor (1042) and to allow connection of the second set of traction batteries with the first charging port (1021) through the first contactor (1041).
2. The charging control system (100) as claimed in claim 1, comprising a controller
(109) to:
receive an indication that charging of the first set of traction batteries and the second set of traction batteries are to happen both from the first charging port (1021) and the second charging port (1022), through the first contactor (1041) and the second contactor (1042);
monitor state of the second contactor (1042); and
allow charging to happen from the first charging port (1021) through the first contactor (1041) in response to the second contactor (1042) being closed.
3. The charging control system (100) as claimed in claim 2, comprising:
a first junction box having the first contactor (1041); and
a second junction box having the second contactor (1042) and the third contactor (1043).
4. A vehicle comprising:
a first set of traction batteries;
a second set of traction batteries;

a first contactor (1041) connected to the first set of traction batteries and to be connected to a first charging port (1021);
a second contactor (1042) connected to the second set of traction batteries and to be connected to a second charging port (1022); and
a third contactor (1043) connected to the first set of traction batteries and the second set of traction batteries, to be connected to the first charging port (1021) through the first contactor (1041), and to be connected to the second charging port (1022) through the second contactor (1042).
5. A method for controlling charging of a first set of traction batteries and the second
set of traction batteries of a vehicle, the method comprising:
receiving an indication that charging of the first set of traction batteries and the second set of traction batteries are to happen both from a first charging port (1021) and a second charging port (1022), through a first contactor (1041) and a second contactor (1042), wherein the first contactor (1041) connects the first set of traction batteries with the first charging port, the second contactor (1041) connects the second set of traction batteries with the second charging port (1022), and a third contactor (1043) is connected to the first set of traction batteries and the second set of traction batteries, is connected to the first charging port through the first contactor (1041), and is connected to the second charging port (1022) through the second contactor (1042);
monitoring state of the second contactor (1042); and
allowing charging to happen from the first charging port through the first contactor (1041) in response to the second contactor (1041) being closed.
6. The method as claimed claim 5, wherein the method comprises:
detecting a connection between a first charger and the first charging port and a second charger and the second charging port;
configuring the charging control system (100) to operate in one of a single-gun charging mode or a dual gun charging mode; and simultaneously charging the plurality of traction batteries (1011-n) in the single-gun charging mode or the dual

gun charging mode using a plurality of contactors (1041-n) provided in a plurality of junction boxes (1031-n).
7. The method as claimed in claim 6, wherein charging the plurality of traction batteries (1011-n) in the dual-gun charging mode comprises:
sending a signal to the plurality of chargers indicating that the plurality of traction batteries (1011-n) are ready for charging when both the plurality of charging ports (1021-n) are in sync;
detecting that the plurality of chargers are ready for charging;
allowing charging of at least one battery from the plurality of traction batteries (1011-n) connected to the first charging port (1021) using the electric current received from a first charging port from the plurality of charging ports (1021-n); and
simultaneously charging at least one battery from the plurality of traction batteries (1011-n) using the electric current received from a second charging port (1022) from the plurality of charging ports (1021-n).