Charging multiple electric motorcycles in parallel
Charging electric vehicles at shared charging stations may involve waiting in line to connect one's vehicle. By allowing multiple motorcycles to charge in parallel at a charging station, better use of the available space can be made and the process can be more efficient for motorcyclists riding in groups. Connectors and cables are configured to connect a chain of motorcycles in parallel to a single charging station. The connectors and cables carry the charging current to each motorcycle and include communication wiring. One motorcycle is deemed a manager motorcycle, which detects the other motorcycles in the chain and initiates charging. Each motorcycle's battery management system controls the amount of charge for its respective battery.
1 . A method for charging multiple motorcycles in parallel comprising:
detecting, by a motorcycle, a connection between a charging port of the motorcycle and a charging station;
detecting by the motorcycle, a further connection, between the motorcycle and at least one other motorcycle;
determining which of said motorcycles is to be a manager motorcycle; and
instructing, by the manager motorcycle, the charging station to initiate charging to said motorcycles.
2 . The method of claim 1 , wherein the manager motorcycle is the motorcycle that is connected closest to the charging station.
3 . The method of claim 1 , wherein the manager motorcycle is the motorcycle that has least charge.
4 . The method of claim 1 , wherein the manager motorcycle is the motorcycle that has highest charge.
5 . The method of claim 1 , wherein said connections each comprise a positive charging connection, a negative charging connection and two communication connections.
6 . The method of claim 5 , wherein the charging station initiates said charging by energizing, in a plug of the charging station, a positive terminal and a negative terminal to which said positive charging connections and said negative charging connections are respectively connected.
7 . The method of claim 5 , wherein the two communication connections form part of a controller area network (CAN) bus.
8 . The method of claim 7 , further comprising:
using a three-way connector to make the connection; and
connecting a termination resistor across CAN_L and CAN_H wires of the CAN bus in the three-way connector.
9 . The method of claim 8 , further comprising, when there is exactly one other motorcycle, using a cable between the three-way connector and the other motorcycle to make the further connection.
10 . The method of claim 7 , further comprising:
using a three-way connector to make the connection;
to make the further connection:
connecting another three-way connector to a first one of the at least one other motorcycle; and
connecting a cable between the three-way connector and the other three-way connector; and
while connecting the cable to the three-way connector, disconnecting a termination resistor that is across CAN_L and CAN_H wires of the CAN bus in the three-way connector.
11 . The method of claim 10 further comprising, when there are at least two of said other motorcycles, connecting, between the other three-way connector and a second one of said other motorcycles, another cable and yet another three-way connector.
12 . The method of claim 7 , further comprising:
making said connections with one or more three-way connectors and one or more cables; and
in making said connections, setting switches in said three-way connectors and said motorcycles so that exactly one termination resistor is connected across CAN_L and CAN_H wires of the CAN bus within said three-way connectors and said motorcycles.
13 . The method of claim 1 , further comprising:
each of said motorcycles broadcasting its identity on said connections; and
each of said motorcycles broadcasting its charge level on said connections.
14 . The method of claim 1 , further comprising said motorcycles communicating with each other wirelessly when said motorcycles cannot communicate via said connections.
15 . The method of claim 1 further comprising detecting said connections by one or more processors and, by said one or more processors:
managing said charging;
preventing further motorcycles from connecting to said motorcycles after a predetermined period of time;
preventing further motorcycles from connecting to said motorcycles after a predetermined limit of a number of motorcycles have been connected;
selecting one of said motorcycles to be the manager motorcycle;
assigning a priority to each motorcycle to be the manager motorcycle;
transmitting an instruction to charge said motorcycles;
detecting when any one of said motorcycles has disconnected from the remaining motorcycles;
selecting, after any one of said motorcycles has disconnected from the remaining motorcycles, one of the remaining motorcycles to be the manager motorcycle;
initiating, after any one of said motorcycles has disconnected, continuation of the charging of the remaining motorcycles; or
any combination selected therefrom.
16 . The method of claim 1 , further comprising the manager motorcycle instructing each of the at least one other motorcycle as to a maximum current that it can draw.
17 . The method of claim 1 , further comprising cyclically partially charging said motorcycles in turn, each of said motorcycles drawing full current while charging.
18 . The method of claim 1 , further comprising controlling at least one aspect of the charging using a mobile communications device.
19 . The method of claim 1 , further comprising controlling the charging of said motorcycles to be complete at the same time.
20 . The method of claim 1 , wherein the further connection is made with at least one three-way connector and at least one cable, wherein:
the three-way connector comprises:
a plug, a first socket and a second socket, wherein each of the plug, the first socket and the second socket has a positive terminal, a negative terminal, a first communication terminal and a second communication terminal;
a first electrical connection between the positive terminals of the plug, the first socket and the second socket;
a second electrical connection between the negative terminals of the plug, the first socket and the second socket;
a third electrical connection between the first communication terminals of the plug, the first socket and the second socket;
a fourth electrical connection between the second communication terminals of the plug, the first socket and the second socket; and
a switch and a 120 ohm resistor connected in series across the third and fourth electrical connections;
wherein:
the plug is configured to mate with a charging socket on each of said motorcycles;
the first socket is configured to mate with a charging station plug; and
the switch is operated by a first type of plug inserted in the second socket and not by a second type of plug inserted in the second socket; and
the cable comprises:
two further plugs, each one located at an end of the cable, wherein each of the further plugs has a further positive terminal, a further negative terminal, a further first communication terminal and a further second communication terminal;
a fifth electrical connection between the further positive terminals of the two further plugs;
a sixth electrical connection between the further negative terminals of the two further plugs;
a seventh electrical connection between the further first communication terminals of the two further plugs; and
an eighth electrical connection between the further second communication terminals of the two further plugs;
wherein the two further plugs comprise one of the first type and one of the second type.