New Eagle J1772 Vehicle Power Interface Module (VPIM)

Transcription

1 New Eagle P.O. Box #272 Ann Arbor, MI Phone Fax New Eagle J1772 Vehicle Power Interface Module (VPIM) Revision 0.8 VPIM /5/2013 New Eagle 3588 Plymouth Road, #272 Ann Arbor, MI

2 Features Includes necessary circuitry to facilitate communication between EVSE and vehicle for charging according to the SAEJ1772 specification 0-5V analog output that is proportional to duty cycle useful for controllers that cannot read duty cycle Additional PWM to analog circuit for an auxiliary sensor useful for controllers that cannot read duty cycle High Side Drive (HSD) capable of sourcing 1.5A that can be enabled under a number of different userselected conditions, which include: o detection of control pilot signal o detection of charge coupler in vehicle inlet o battery voltage drops below a certain user-configurable threshold o key to start o key to run Optional timer that shuts down the High Side Drive (HSD) 26 seconds after it has been enabled. User can add or remove timer from circuitry. Aforementioned features can be configured by user via harness connection, which offers flexibility during the development process Overvoltage, reverse polarity, and ESD protection Applications Electric Vehicles Plug-in Hybrid Electric Vehicles Description The New Eagle Vehicle Power Interface Module (VPIM) provides the necessary circuitry to interface with Electric or Plug-In Hybrid Electric (EV/PHEV) vehicles charging equipment in accordance with the SAEJ1772 specification. The VPIM allows the vehicle systems and ECUs that require a low current Sleep mode to be managed externally by the VPIM. The VPIM monitors the inputs and provides an output that will drive an external Wake Up relay which in turn provides power to the systems connected. The VPIM also supplies feedback in the form of conditioned PWM and signals to the vehicle system(s) which control the flow of energy from the charger to the vehicle. The analog feedback is output in the form of a 0V to 5V DC signal proportional to the duty cycle of the PWM Input. The PWM feedback rectifies the SAEJ1772 +/- 12V PWM signal into a 0 9V(max) PWM signal that can be read by most standard ECUs. The VPIM also provides a path to control the state of the J1772* control pilot voltage level. When asserted (Low) by the ECU connected to the VPIM this signal will tell the electric vehicle supply equipment (EVSE) that the vehicle is ready to accept charging and allow the EVSE to engage its main contactors.

3 Absolute Maximum Ratings Parameter Min Nom Max Unit Supply Voltage V Operating Temperature 150 C Storage Temperature 150 C HSD continuous current rating 1.5 A Operating Ratings Parameter Conditions Min Nom Max Units State B Voltage V State C Voltage V Low Battery Voltage Threshold Start Input Voltage Threshold to enable HSD Run Input Voltage Threshold to enable HSD Nominal time HSD is enabled when timer is used PWM to inaccuracy R1 shorted to R V R2 shorted to R V R1 shorted to R V no short between R1,R2, R V 3.76 V 3.76 V 26 s 2 % PWM to inaccuracy 2 % Proximity Voltage charge coupler 4.46 V disconnected charge couple connected 1.51 V charge coupler connected and button is pressed to disconnect cable 2.76 V

4 RIGHT Connector* LEFT Connector* Connections Pin I/O Name Description 1 Battery Voltage Connects to positive lead of a nominally 12V battery An analog signal ranging from 0V to Battery Voltage that is proportional to the 2 Output output duty cycle of the signal going into Pin 8, e.g. for duty cycle = 25%, Battery Voltage=14V, Pin 2 Voltage = 3.5V. 3 Output Monitor 4 Output High Side Drive 5 Input 6 Input 7 Output 8 Input State Proximity Voltage 9 Input Start 10 Input Run 11 Input PWM Monitor PWM signal input Input 12 Ground Connects to chassis ground Output Proximity Voltage A 0-5V analog signal that is proportional to the duty cycle of the control pilot signal. e.g. for duty cycle = 25%, Pin 3 Voltage = 1.25V. Used to infer duty cycle of signal which communicates maximum continuous current capacity of EVSE. Typically used in control modules that do not have frequency inputs. Connects to Electric Vehicle Control Module. The High Side Drive is enabled under a number of different circumstances. When enabled, High Side Drive voltage is equal to battery Voltage. Typically used to wake up (i.e power on) Electric Vehicle Control Module. Grounding this pin allows the vehicle to communicate to the EVSE that it is ready to accept charge (i.e. State C). Connects to Electric Vehicle Control Module The proximity signal communicates the connection status of the charge coupler to the vehicle. Signal connects to J1772 charge coupler port in the vehicle. Outputs a 0-5V version of control pilot signal going into pin 11. A buffer ensures reading the control pilot signal on pin 7 will not affect the signal on Pin 11. Used to read duty cycle of signal which communicates maximum continuous current capacity of EVSE. Connects to Electric Vehicle Control Module. Input pin for PWM to analog circuit. Pin 2 outputs an analog signal that is proportional to the duty cycle of the signal going into this pin. Note that this input is designed to be driven by a Low Side Drive. If Pin 9 sees a voltage greater than 3.76V, the High Side Drive will turn on. Connects to key switch. If Pin 10 sees a voltage greater than 3.76V, the High Side Drive will turn on. Connects to key switch. The control pilot signal originating from the EVSE facilitates communication between the EVSE and vehicle. Signal connects to J1772 charge coupler port in the vehicle. See Configurable Features table below Internally connected to pin 6. Pin 13 may be used to monitor the voltage level on the Proximity signal and infer the charge coupler connection status. Connects to Electric Vehicle Control Module. Not used See Configurable Features table below 12 *When looking towards the connectors from outside the enclosure. Left connector is grey. Right connector is black.

5 Configurable Features Desired Configuration HSD wakes up and remains on when Proximity Voltage signal OR Signal are detected HSD wakes up for about 30 seconds when Proximity Voltage signal OR Signal are detected Enable Low Battery wakeup Set low battery voltage threshold to 9.96V Set low battery voltage threshold to Set low battery voltage threshold to 10.53V Set low battery voltage threshold to 11.01V Pins to Short R6 to R5 R12 to R4 R11 to R3 R1 to R10 R2 to R10 R1 to R2 no short between R1,R2, R10 High Side Driver Operation If any one of the following conditions is true, the High Side Drive will turn on: Signal going into Start input goes HIGH (voltage level exceeds 3.76V) Signal going into Run input goes HIGH (voltage level exceeds 3.76V) Battery Voltage Drops below a certain threshold (R3 and R11 must be shorted). See Configurable Features tables for low battery voltage threshold values. VPIM senses control pilot signal (R5 and R6 must be shorted OR R4 and R12 must be shorted). VPIM senses proximity input signal (R5 and R6 must be shorted OR R4 and R12 must be shorted). If R5 and R6 are shorted, the High Side Drive will remain on so long as the VPIM senses a control pilot signal or proximity input signal. If R4 and R12 are shorted, the High Side Drive will turn off after approximately 26 seconds; even if VPIM continues to senses the control pilot or proximity input signals. In all other cases (Start, Run, Low Battery Voltage), the VPIM remains on so long as the condition is true (even past 26 seconds).

6 New Eagle P.O. Box #272 Ann Arbor, MI Phone Fax Connection Diagram 12V Battery J1772 input port OR OR Fuse L12 L1 L10 L9 L11 L6 R5 R6 R1 R2 R10 Ground Battery Voltage Run Start Control Pilot Input Prox. Input Short R5 and R6 for continuous HSD wakeup Battery Voltage Threshold R1 to R10 = 9.96V R2 to R10 = 10.44V R1 to R2 = 10.53V No short = 11.01V NewEagle J1772 VPIM Internal connection PWM to Circuit Monitor PWM Monitor Control Pilot State High Side Drive Output PWM Signal Input Prox. Volt. Monitor Short R4 and R12 for 30sec HSD wakeup Short R3 and R11 to enable low battery HSD wakeup L3 L7 L5 L4 L2 L8 R7 R12 R4 R11 R3 Electric Vehicle Control Module input Frequency Input Low Side Drive EVCM Wakeup PWM Output input R9 No Connection No Connection R8 Notes: 1. Although both pins L3 and L7 are shown connected to the EVCM, only one of the two outputs is needed. If a frequency input is available on the EVCM, then pin L7 can be used. Otherwise, pin 3 can be fed into an analog input. 2. Use of the PWM to Circuit is optional. The analog output signal on pin L2 may be useful if an analog output is needed but not available on the EVCM. 3. A short should not be placed across R5 and R6 and across R4 and R12. Only one short is necessary if the end user wants the HSD to be enabled when the VPIM senses the or Proximity Input signals. Additionally no shorts may be used if the end user does not desire this feature. 4. Typically the HSD is connected to an input on the EVCM, such as keyswitch, that will wake up the EVCM module from a sleep state. New Eagle 3588 Plymouth Road, #272 Ann Arbor, MI

7 New Eagle P.O. Box #272 Ann Arbor, MI Phone Fax Physical Characteristics Parameter Value Units Overall Length 5.24 (133.03) in (mm) Overall Height 1.42 (36.00) in (mm) Overall Width 4.68 (118.8) in (mm) Total Weight 0.5 (0.227) lb (kg) New Eagle 3588 Plymouth Road, #272 Ann Arbor, MI