CHARGING DEVICE FOR USE WITH ELECTRIC VEHICLES AND METHODS OF ASSEMBLING SAME
BACKGROUND OF THE INVENTION
[0001] The present application relates generally to charging devices and  more particularly  to charging devices for use with electric vehicles and methods of assembling the same.
[0002] As electric vehicles and/or hybrid electric vehicles have gained popularity  an associated need to accurately manage the delivery of electrical energy to such vehicles has increased. Moreover  a need to provide safe and efficient charging devices or stations has been created by the increased use of such vehicles.
[0003] At least some known charging stations include a power cable or another conductor that may be removably coupled to the electric vehicle. Such charging stations receive electricity from an electric utility distribution network or from another electricity source  and meter the delivery of electricity to the electric vehicle through the power cable.
[0004] In at least some electric utility distribution networks  a plurality of charging devices receive electricity from a common electrical distribution component  such as a transformer. However  if each charging device supplies charging current to an electric vehicle at the same time  the current supplied through the electrical distribution component may exceed a rated current limit of the component. For example  a loss of power may affect a plurality of charging stations coupled to a common electrical distribution component. If power is restored substantially simultaneously to the charging stations  each charging station may attempt to draw current through the component to charge an electric vehicle. Such a rapid “inrush surge” current supplied through the electrical distribution component may damage the component and/or may undesirably cause a circuit breaker or another protection device to disable power to all charging devices coupled to the electrical distribution component.
BRIEF DESCRIPTION OF THE INVENTION
[0005] In one embodiment  a charging device for use with an electric vehicle including a power storage device is provided that includes a power delivery system configured to deliver power to the power storage device. The charging device also includes a controller coupled to the power delivery system. The controller is configured to determine that an initialization process has completed after the charging device has experienced a loss of power and enable the power delivery system to deliver power to the power storage device at a defined start time and after the initialization process has completed.
[0006] In another embodiment  a controller for use with a charging device is provided that includes a memory device and a processor coupled to the memory device. The processor is configured to receive data from the memory device and determine that an initialization process has completed after the charging device has experienced a loss of power. The processor is also configured to determine a start time to deliver power to a power storage device at least partially based on the data received  and transmit a signal to a power delivery system to cause the power delivery system to deliver power to the power storage device at the start time.
[0007] In yet another embodiment  a method of assembling a charging device is provided that includes providing a power delivery system configured to deliver power to a power storage device and coupling a controller to the power delivery system. The controller is configured to determine that an initialization process has completed after the charging device has experienced a loss of power  select a start time for power to be delivered to the power storage device  and enable the power delivery system to deliver power to the power storage device at the selected start time.
BRIEF DESCRIPTION OF THE DRAWINGS
[0008] Fig. 1 is a block diagram of an exemplary system for use in charging an electric vehicle.
[0009] Fig. 2 is a block diagram of an exemplary charging device that may be used with the system shown in Fig. 1.
[0010] Fig. 3 is a flow diagram of an exemplary method that may be used for controlling a charging device that may be used with the charging device shown in Fig. 2.
DETAILED DESCRIPTION OF THE INVENTION
[0011] In some embodiments  the term “electric vehicle” refers generally to a vehicle that includes one or more electric motors that are used for propulsion. Energy used to propel electric vehicles may come from various sources  such as  but not limited to  an on-board rechargeable battery and/or an on-board fuel cell. In one embodiment  the electric vehicle is a hybrid electric vehicle  that captures and stores energy generated  for example  by braking. Moreover  a hybrid electric vehicle uses energy stored in an electrical source  such as a battery  to continue operating when idling to conserve fuel. Some hybrid electric vehicles are capable of recharging the battery by plugging into a power receptacle  such as a power outlet. Accordingly  the term “electric vehicle” as used herein may refer to a hybrid electric vehicle or any other vehicle to which electrical energy may be delivered  for example  via the power grid.
[0012] Fig. 1 illustrates an exemplary system 100 for use in charging  or providing electricity to  an electric vehicle 102. In the exemplary embodiment  system 100 includes a charging device 104 coupled to electric vehicle 102. In the exemplary embodiment  electric vehicle 102 includes at least one power storage device 106  such as a battery and/or any other storage device  coupled to a motor 108. Moreover  in the exemplary embodiment  electric vehicle 102 includes a vehicle controller 110 coupled to power storage device 106.
[0013] In the exemplary embodiment  charging device 104 is removably coupled to power storage device 106 and to vehicle controller 110 by at least one power conduit 112. Alternatively  charging device 104 may be coupled to power storage device 106 and/or vehicle controller 110 using any other conduit or conduits  and/or charging device 104 may be coupled to vehicle controller 110 via a wireless data link (not shown). In the exemplary embodiment  power conduit 112 includes at least one conductor (not shown) used for supplying electricity to power storage device 106 and/or to any other component within electric vehicle 102  and at least one conductor (not shown) for transmitting data to  and receiving data from  vehicle controller 110 and/or any other component within electric vehicle 102. Alternatively  power conduit 112 may include a single conductor that transmits and/or receives power and/or data  or any other number of conductors that enables system 100 to function as described herein. Moreover  in the exemplary embodiment  charging device 104 is coupled to an electric power source 114  such as a power grid of an electric utility company  a generator  a battery  and/or any other device or system that provides electricity to charging device 104.
[0014] In the exemplary embodiment  charging device 104 is coupled to at least one remote server 116 through a network  such as the Internet  a local area network (LAN)  a wide area network (WAN)  and/or any other network or data connection that enables charging device 104 to function as described herein. Server 116  in the exemplary embodiment  communicates with charging device 104  for example  by transmitting a signal to charging device 104 to authorize payment and/or delivery of electricity to power storage device 106  to access customer information  and/or to perform any other function that enables system 100 to function as described herein.
[0015] In the exemplary embodiment  server 116 and vehicle controller 110 each include at least one processor and at least one memory device (neither shown). Such processors may include any suitable programmable circuit that may include one or more systems and microcontrollers  microprocessors  reduced instruction set circuits (RISC)  application specific integrated circuits (ASIC)  programmable logic circuits (PLC)  field programmable gate arrays (FPGA)  and any other circuit capable of executing the functions described herein. The above examples are exemplary only  and thus are not intended to limit in any way the definition and/or meaning of the term “processor.” The memory devices each include a computer readable medium  such as  without limitation  random access memory (RAM)  flash memory  a hard disk drive  a solid state drive  a diskette  a flash drive  a compact disc  a digital video disc  and/or any suitable memory device that enables the processors to store  retrieve  and/or execute instructions and/or data.
[0016] During normal operation  in the exemplary embodiment  a user couples power storage device 106 to charging device 104 with power conduit 112. The user may access a user interface (not shown in Fig. 1) of charging device 104 to enter information  such as payment information  and/or to initiate power delivery to power storage device 106. Charging device 104 communicates with server 116  for example  to authenticate the user  to process payment information  and/or to approve or authorize a power delivery. If charging device 104 receives a signal from server 116 that indicates approval or authorization to deliver power to power storage device 106  charging device 104 receives power from electric power source 114 and provides the power to power storage device 106 through power conduit 112.
[0017] In the exemplary embodiment  charging device 104 communicates with vehicle controller 110 wirelessly  through power conduit 112  and/or through any other conduit  to control and/or to monitor the delivery of power to power storage device 106. For example  vehicle controller 110 may transmit signals to charging device 104 that are indicative of a charge level of power storage device 106 and/or a desired amount and/or rate of power to be provided by charging device 104. Moreover  charging device 104 may transmit signals to vehicle controller 110 indicative of an amount and/or rate of electricity being delivered to power storage device 106. Additionally or alternatively  charging device 104 and/or vehicle controller 110 may transmit and/or receive any other signals or messages that enable system 100 to function as described herein. When power storage device 106 has been charged to a desired level  charging device 104 ceases delivering power to power storage device 106 and the user disengages power conduit 112 from power storage device 106.
[0018] Fig. 2 is a block diagram of an exemplary charging device 104 that may be used with system 100 (shown in Fig. 1). In the exemplary embodiment  charging device 104 includes a controller 200 that includes a processor 202 and a memory device 204. As described more fully herein  controller 200 is coupled to a network interface 206  to a display 208  to a user interface 210  to a meter 212  and to a power delivery system 214.
[0019] Processor 202 includes any suitable programmable circuit which may include one or more systems and microcontrollers  microprocessors  reduced instruction set circuits (RISC)  application specific integrated circuits (ASIC)  programmable logic circuits (PLC)  field programmable gate arrays (FPGA)  and any other circuit capable of executing the functions described herein. The above examples are exemplary only  and thus are not intended to limit in any way the definition and/or meaning of the term “processor.” Memory device 204 includes a computer readable medium  such as  without limitation  random access memory (RAM)  flash memory  a hard disk drive  a solid state drive  a diskette  a flash drive  a compact disc  a digital video disc  and/or any suitable device that enables processor 202 to store  retrieve  and/or execute instructions and/or data.
[0020] Network interface 206  in the exemplary embodiment  transmits and receives data between controller 200 and a remote device or system  such as server 116 (shown in Fig. 1) and/or any other suitable computer system or device. In the exemplary embodiment  network interface 206 communicates with the remote device or system and with controller 200 using any suitable communication protocol  such as a wired Ethernet and/or a wireless cellular protocol. Moreover  in the exemplary embodiment  network interface 206 receives at least one signal and/or data from server 116 and/or any other remote device or system to control a power delivery to power storage device 106 and/or to control a startup of charging device 104.
[0021] In the exemplary embodiment  display 208 includes a vacuum fluorescent display (VFD) and/or one or more light-emitting diodes (LED). Additionally or alternatively  display 208 may include  without limitation  a liquid crystal display (LCD)  a cathode ray tube (CRT)  a plasma display  and/or any suitable visual output device capable of displaying graphical data and/or text to a user. In the exemplary embodiment  a charging status of power storage device 106 (shown in Fig. 1)  payment information  user authentication information  and/or any other information may be displayed to a user on display 208.
[0022] User interface 210 includes  without limitation  a keyboard  a keypad  a touch-sensitive screen  a scroll wheel  a pointing device  a barcode reader  a magnetic card reader  a radio frequency identification (RFID) card reader  an audio input device employing speech-recognition software  and/or any suitable device that enables a user to input data into charging device 104 and/or to retrieve data from charging device 104. In the exemplary embodiment  the user may operate user interface 210 to initiate and/or terminate the delivery of power to power storage device 106. In one embodiment  the user may input user authentication information and/or payment information using user interface 210. Moreover  in the exemplary embodiment  a technician or another user may operate user interface 210 and/or another input mechanism (not shown) to control a startup of charging device 104  for example  after charging device 104 has been shut down or restarted. For example  a user may manipulate user interface 210 to select or define a time (or “start time”) to initiate power delivery from charging device 104 after charging device 104 is restarted  and the start time may be transmitted to processor 202 and/or stored within memory device 204.
[0023] In the exemplary embodiment  power delivery system 214 is coupled to power conduit 112 and to meter 212. Moreover  in the exemplary embodiment  power delivery system 214 includes a contactor (not shown) coupled to  and controlled by  controller 200. Alternatively or additionally  power delivery system 214 includes at least one switching device or any other device (not shown) that converts alternating current (AC) power received from electric power source 114 to direct current (DC) power for use in charging power storage device 106. In the exemplary embodiment  controller 200 operates power delivery system 214  such as by opening the contactor  to interrupt the current flowing through power conduit 112 such that power storage device 106 is electrically disconnected from electric power source 114 (shown in Fig. 1). Moreover  in the exemplary embodiment  controller 200 operates power delivery system 214  such as by closing the contactor  to enable current to flow through power conduit 112 such that power storage device 106 is electrically connected to electric power source 114.
[0024] Moreover  in the exemplary embodiment  meter 212 is coupled to power delivery system 214 and to controller 200 for use in measuring and/or calculating the current  voltage  and/or power provided from electric power source 114 to power storage device 106. In the exemplary embodiment  meter 212 is an advanced metering infrastructure (AMI) meter 212 that communicates with an AMI network (not shown) via an AMI interface 216. Moreover  in the exemplary embodiment  AMI interface 216 communicates with at least one system or device via the AMI network using power line communication  communication via twisted pair conductors  radio frequency communication  and/or using any other communication technology or protocol that enables charging device 104 to function as described herein. In the exemplary embodiment  electric power source 114 is coupled to and/or is a part of the AMI network.
[0025] A current protection device 218 is coupled to meter 212 and to electric power source 114. Current protection device 218  in the exemplary embodiment  electrically isolates or disconnects charging device 104 from electric power source 114 if the current received from electric power source 114 exceeds a predetermined threshold or current limit. In the exemplary embodiment  current protection device 218 is an electric circuit contactor 218. Alternatively  current protection device 218 may be a fuse  a circuit breaker  a relay  and/or any other device that enables current protection device 218 to function as described herein.
[0026] During operation  in the exemplary embodiment  charging device 104 controllably supplies current to electric vehicle 102. More specifically  in the exemplary embodiment  charging device 104 receives current from electric power source 114 and measures the amount of current received via meter 212. Controller 200 determines whether current should be provided to power storage device 106. In one embodiment  controller 200 receives authorization to provide power to power storage device 106  for example  from a utility system or device via AMI interface 216  from a remote system or device via network interface 206  and/or from any other system or device via any interface that enables charging device 104 to function as described herein. Upon receiving the authorization and/or determining that current should be provided to electric vehicle 102  controller 200 operates power delivery system 214 (e.g.  closes the contactor) and the current is transmitted through power conduit 112 to power storage device 106.
[0027] Moreover  charging device 104 may experience a loss of power or may be “shut down” while electric vehicle 102 is electrically coupled to charging device 104 via power conduit 112  and/or while power storage device 106 is receiving current from charging device 104. As used herein  the term “shut down” or “loss of power” refers to a process or state in which one or more components of charging device 104 are de-energized and/or are electrically disconnected from electric power source 114. For example  charging device 104 may be shut down or experience a loss of power during a maintenance event  during a fault or error within electric power source 114  during a demand response event initiated by a device or system within the AMI network  and/or any other event that causes one or more components of charging device 104 to be de-energized. Moreover  a loss of power and/or a shut down event may additionally or alternatively include a restart or “reboot” of charging device 104  wherein one or more components of charging device 104 are reset or initialized to startup values as a result of a temporary reduction in power to charging device 104 and/or as a result of a fault or error within charging device 104.
[0028] After power is restored to charging device 104  in the exemplary embodiment  the delivery of current to power storage device 106 is controllably commenced or resumed. More specifically  in the exemplary embodiment  charging device 104 executes an initialization process in which one or more components of charging device 104 are reset to a known operational state that enables charging device 104 to commence or resume power delivery. Charging device 104 determines a start time in which to commence or resume delivery of power to power storage device 106. In the exemplary embodiment  the start time is set or determined to occur after the initialization process has completed. Alternatively  the start time may be any other time that enables charging device 104 to function as described herein.
[0029] In the exemplary embodiment  controller 200 delays the start time for a predetermined time after the initialization process has completed (i.e.  the start time occurs after a predetermined delay time has elapsed). More specifically  controller 200 waits for a delay time to elapse (after the initialization process has completed) before operating power delivery system 214 (e.g.  by closing the contactor) to provide current to power storage device 106. In the exemplary embodiment  controller 200 stores a delay value in a memory location of memory device 204 during normal operation. In the exemplary embodiment  the delay value is retained (i.e.  is persistent) in memory device 204 during a loss of power to charging device 104. In one embodiment  the delay value is a value randomly selected between a minimum value  such as about 0 minutes  and a maximum value  such as about 15 minutes. As used herein  the term “random” also includes pseudorandom algorithms and/or numbers. Alternatively  the delay value may be set to any other random value or to a value previously selected via user interface 210  such as a value between about 0 minutes and about 5 minutes  or any other value that enables charging device 104 to function as described herein.
[0030] After controller 200 determines that the initialization process has completed  controller 200 references the delay value stored in memory device 204. Controller 200 waits an amount of time represented by the delay value (hereinafter referred to as the “delay time”). More specifically  in the exemplary embodiment  controller 200 waits for the delay time to elapse by counting down from the delay value to zero. Alternatively  controller 200 may count up from zero to the delay value or may count from any other value that enables charging device 104 to function as described herein. Once the delay time has elapsed  (i.e.  when the start time occurs) controller 200 operates power delivery system 214 (e.g.  by closing the contactor) to enable current to be provided to power storage device 106. As such  controller 200 enables charging device 104 to commence providing current to power storage device 106 at a different time than other charging devices that are re-energized after a common power loss  thus minimizing or reducing sudden increases in an inrush surge current drawn from a common power delivery component within a power distribution network.
[0031] In one embodiment  a system or device owned or operated by a utility company (hereinafter referred to as a “utility system”) or any other system or device may control the delayed current delivery of charging device 104. More specifically  the utility system may transmit data to charging device 104 representative of the delay value. The data is received by network interface 206 and/or AMI interface 216 and is stored in the memory location within memory device 204 corresponding to the delay value. The data in memory device 204  including the delay value  is persistent during a loss of power. In another embodiment  the utility system and/or any other system or device may transmit data to charging device 104 representative of a time of day  a relative time  and/or any other time that charging device 104 should commence delivering current to power storage device 106.
[0032] Moreover  in the exemplary embodiment  the delay value may be overridden such that charging device 104 provides current to power storage device 106 substantially immediately after the initialization process has completed. In one embodiment  the utility system may transmit data representative of an override of the delay value to charging device 104  and charging device 104 stores data representative of the override in a memory location within memory device 204. The data in memory device 204  including the override state  is persistent during a loss of power. Alternatively  any other system or device may transmit data representative of an override of the delay value. After the initialization process has completed  in the exemplary embodiment  charging device 104 determines whether the memory location associated with the override includes data indicative of an override. If such an override is indicated  charging device 104 ignores the delay value and provides current to power storage device 106 substantially immediately after the initialization process has completed (i.e.  the start time is determined to be substantially immediately after the initialization process has completed). However  if data representative of an override command is not stored in the associated memory location  controller 200 references the memory location associated with the delay value to determine the amount of time to wait before providing current to power storage device 106.
[0033] In another embodiment  a technician or another user may control the delayed current delivery of charging device 104. In such an embodiment  the user may manipulate user interface 210 to set a delay value and/or to override the delay value. For example  if the user desires to perform maintenance on charging device 104  the user may manipulate user interface 210 to disable or override the delay value during the next startup of charging device 104. Data representative of the delay value and/or the override is transmitted to processor 202 and/or memory device 204  and processor 202 determines the start time and/or delay value based on the data received.
[0034] In one embodiment  the data representative of an override of the delay value is automatically removed from the memory location by controller 200 after the initialization process has completed and/or after charging device 104 commences or resumes delivering power to power storage device 106. Alternatively  the user  the utility system  and/or any other system or device may provide data to controller 200 indicative of a number of startups to perform with the delay value overridden  and/or indicative that the override of the delay value persists until removed by the user  the utility system  and/or the other system or device.
[0035] Moreover  in another embodiment  the user  the utility system  a system within the AMI network  and/or any other remote system or device may override the delay value while controller 200 is already waiting for the delay value to elapse. In such an embodiment  charging device 104 commences delivering current to power storage device 106 once the delay value is overridden.
[0036] Fig. 3 is a flow diagram of an exemplary method 300 for controlling a charging device  such as charging device 104 (shown in Fig. 1). In the exemplary embodiment  method 300 is at least partially embodied within a plurality of instructions stored within memory device 204 that are executed by processor 202 (both shown in Fig. 2).
[0037] In the exemplary embodiment  charging device 104 commences 302 charging a power storage device  such as power storage device 106 (shown in Fig. 1). Moreover  in the exemplary embodiment  charging device 104 defaults to a delayed charging operation  as described more fully herein  during or after a startup of charging device 104 (i.e.  after the initialization process has completed). More specifically  a predetermined memory location (hereinafter referred to as a “startup memory location”) within memory device 204 is used to store data  such as a startup variable  representative of the startup operation of charging device 104. In the exemplary embodiment  the startup variable is set to a value representative of a delayed power delivery (hereinafter referred to as a “delayed start value”) to power storage device 106 as a default. The startup variable may be set to a value representative of an immediate power delivery (hereinafter referred to as an “immediate start value”) to power storage device 106 when charging device 104 is notified and/or or directed to begin or resume charging power storage device 106 after a startup. Accordingly  during or after a startup of charging device 104  the startup variable is set 304 to the delayed start value and/or to any other value that enables method 300 to delay charging after a startup.
[0038] In some embodiments  a notification and/or data representative of an override of the delayed power delivery is received 306 by charging device 104. Such a notification and/or data may be generated by a utility company system  a system within the AMI network  from a remote system  from user interface 210  and/or from any other system or device that enables method 300 to function as described herein. Based on the received notification and/or data  the startup variable is set 308 to the immediate start value and/or any other value that enables method 300 to override the delayed power delivery to power storage device 106.
[0039] If a loss of power occurs 310 (i.e.  if charging device 104 is de-energized) while charging device 104 is electrically coupled to power storage device 106  the charging of power storage device 106 is interrupted. When power is restored 312 (i.e.  when charging device 104 is energized)  charging device 104 completes a startup or initialization process. In one embodiment  after completing the initialization process  components of charging device 104 are energized  but charging device 104 does not resume the power delivery to power storage device 106 until charging device 104 receives authorization  such as from a utility system  from a remote system such as a system within the AMI network  from user interface 210  from receiving a predetermined value from memory device 204 (such as the immediate start value)  from a notification or determination that the delay value has elapsed  and/or any other authorization device  system  or source that enables method 300 to function as described herein.
[0040] Once power is restored 312 and/or after the initialization process has completed  method 300 determines 314 whether the startup variable is set to the immediate start value. If the startup variable is set to the immediate start value  charging device 104 resumes or commences 302 charging power storage device 106. However  if the startup variable is set to the delayed startup value or any other value  a delay value is determined 316. In the exemplary embodiment  the delay value is described above with reference to Fig. 2. As such  the delay value is stored in and/or retrieved from a memory location within memory device 204. Alternatively  the delay value is determined 316 to be any other delay value that enables method 300 to function as described herein.
[0041] In the exemplary embodiment  charging device 104 waits 318 for an amount of time (the “delay time”) represented by the delay value to elapse. When the delay time has elapsed  charging device 104 resumes or commences 302 charging power storage device 106.
[0042] While the exemplary embodiment has been described with reference to an electric vehicle  it should be recognized that charging device 104 may be used with any suitable electrical load  such as an appliance  a machine  and/or any other device or system that includes a power storage device.
[0043] In contrast to prior art systems that may commence charging without a delay after a loss of power has occurred  charging device 104 is enabled to deliver charging power to electric vehicle 102 after a delay time has elapsed and/or at a selectable start time after an initialization process has completed. Such a delay time  in the exemplary embodiment  is facilitated to be different than a delay time implemented by neighboring charging devices and/or charging devices coupled to a common electrical distribution component. As such  charging device 104 facilitates preventing and/or reducing a sudden  undesirable increase of inrush current being drawn from the electrical distribution component after a loss of power has occurred.
[0044] As described herein  a robust and effective charging device is provided. The charging device includes a controller that operates a power delivery system for use in supplying charging current to a power storage device of an electric vehicle. The controller is programmed with a selectable or defined start time and/or delay time  such as a randomly calculated delay time. If the charging device is notified of an impending shutdown event  the delay time may be overridden such that the charging device commences or resumes charging the power storage device without delay after power has been restored to the charging device. If  however  the charging device experiences an unexpected loss of power  after power has been restored  the charging device waits until the delay time has elapsed before commencing or resuming charging the power storage device. As such  the charging device is facilitated to initiate or resume charging the power storage device at a different time than other charging devices that experience a common loss of power. Accordingly  the charging device described herein facilitates gradually increasing the current and power supplied through a common electrical distribution component as additional charging devices resume or commence delivering power.
[0045] A technical effect of the device and methods described herein includes at least one of (a) providing a power delivery system configured to deliver power to a power storage device; and (b) coupling a controller to a power delivery system  wherein the controller is configured to select a start time for power to be delivered to a power storage device  and enable the power delivery system to deliver power to the power storage device at the selected start time.
[0046] Exemplary embodiments of a charging device and methods of assembling a charging device are described above in detail. The charging device and methods are not limited to the specific embodiments described herein  but rather  components of the charging device and/or steps of the methods may be utilized independently and separately from other components and/or steps described herein. For example  the charging device may also be used in combination with other power systems and methods  and is not limited to practice with only the electric vehicle as described herein. Rather  the exemplary embodiment can be implemented and utilized in connection with many other power system applications.
[0047] Although specific features of various embodiments of the invention may be shown in some drawings and not in others  this is for convenience only. In accordance with the principles of the invention  any feature of a drawing may be referenced and/or claimed in combination with any feature of any other drawing.
[0048] This written description uses examples to disclose the invention  including the best mode  and also to enable any person skilled in the art to practice the invention  including making and using any devices or systems and performing any incorporated methods. The patentable scope of the invention is defined by the claims  and may include other examples that occur to those skilled in the art. Such other examples are intended to be within the scope of the claims if they have structural elements that do not differ from the literal language of the claims  or if they include equivalent structural elements with insubstantial differences from the literal language of the claims.
WHAT IS CLAIMED IS:
1. A charging device (104) for use with an electric vehicle (102) including a power storage device (106)  said charging device comprising:
a power delivery system (214) configured to deliver power to the power storage device; and
a controller (200) coupled to said power delivery system  said controller configured to:
determine that an initialization process has completed after said charging device has experienced a loss of power; and
enable said power delivery system to deliver power to the power storage device at a defined start time and after the initialization process has completed.
2. A charging device (104) in accordance with Claim 1  wherein said controller (200) determines the start time to be substantially immediately after the initialization process has completed.
3. A charging device (104) in accordance with Claim 1  wherein said controller (200) determines the start time at least partially based on data received from a source external to said charging device.
4. A charging device (104) in accordance with Claim 1  wherein said controller (200) determines the start time to be when a delay time has elapsed after the initialization process has completed.
5. A charging device (104) in accordance with Claim 4  wherein said controller (200) determines the delay time based on a random value.
6. A charging device (104) in accordance with Claim 4  further comprising a user interface (210)  wherein a user selects the delay time using said user interface.
7. A charging device (104) in accordance with Claim 4  wherein said controller (200) overrides the delay time based on data received.
8. A controller (200) for use with a charging device (104)  said control system comprising:
a memory device (204); and
a processor (202) coupled to said memory device  said processor configured to:
receive data from said memory device;
determine that an initialization process has completed after the charging device has experienced a loss of power;
determine a start time to deliver power to a power storage device (106) at least partially based on the data received; and
transmit a signal to a power delivery system (214) to cause the power delivery system to deliver power to the power storage device at the start time.
9. A controller (200) in accordance with Claim 8  wherein said processor (202) is configured to determine the start time to be substantially immediately after the initialization process has completed.
10. A controller (200) in accordance with Claim 8  wherein said processor (202) is configured to determine the start time at least partially based on data received from a source external to the charging device (104).