technical reference can-wifi-gateway · can-wifi-gw technical reference version 1.2.0 authors...

CAN-WiFi-GW

Technical Reference

Version 1.2.1

Authors Vector Informatik GmbH

Status Released

Technical Reference CAN-WiFi-GW

© 2021 Vector Informatik GmbH Version 1.2.1 2

based on template version 6.2.0

Document Information

History

Author Date Version Remarks

Vector Informatik GmbH 2020-04-21 1.0.1 Document Information added

dim 2020-06-02 1.1.0 Connector info added (ch.3.4)

rpl/ssm/dim 2020-07-22 1.2.0 Chapter 2: Update graphic + text

Chapter 3.3: CAN bus termination added

ssm 2021-02-01 1.2.1 Reference Documents updated

URL for User Manual updated

Reference Documents

No. Source Title Version

[1] Vector CAN-Wifi-GW User Manual

Caution To avoid personal injuries and damage to property, you have to read and understand the safety instructions and hazard warnings, which are listed in the CAN-WiFi-GW user manual see [1]. Prior to installation and use of this ECU, keep the user manual always near the ECU. The CAN-WiFi-GW user manual is available at: www.vector.com/vc-evcc-p

http://www.vector.com/




Contents

1 General............................................................................................................................ 5

2 System Architecture....................................................................................................... 7

3 ECU ................................................................................................................................. 8

3.1 Mechanic specifications............................................................................................ 8

3.2 Electrical specifications ............................................................................................ 8

3.3 Interfaces ................................................................................................................. 9

3.4 Input/ Output of the 5-pin plug: CAN/ Power ............................................................. 9

3.5 Antenna .................................................................................................................... 9

4 Software ........................................................................................................................ 10

4.1 Bootloader .............................................................................................................. 10

4.2 Application.............................................................................................................. 10

5 Qualification ................................................................................................................. 11

6 Certification .................................................................................................................. 12

7 Restrictions of usage (EU member states) ................................................................. 13

8 Glossary and Abbreviations ........................................................................................ 14

8.1 Abbreviations & Glossary ....................................................................................... 14




Illustrations

Figure 1-1 CAN-WiFi-GW ............................................................................................ 5 Figure 2-1 System Overview ........................................................................................ 7 Figure 3-1 Product overview ........................................................................................ 8 Figure 3-2 Input/ Output Signals .................................................................................. 9

Tables

Table 1-1 Product range ............................................................................................. 6




1 General

The CAN-WiFi-Gateway (CWG) is intended to be used as an interface between Electric Vehicle Communication Controller (EVCC) on the vehicle side and the Supply Equipment Communication Controller (SECC) in the charging station.

Figure 1-1 CAN-WiFi-GW

The CWG has the following functions:

> Management of operational states: start-up phase / shut-down phase

> Self-diagnosis

> Forwarding of charging communication (TLS encryption by host controller)

> Operating state control

> Information output on status and self-diagnosis




The following parts are included in the product range:

Part Description

CAN-WiFi-GW ECU with integrated software

Product supplement Short description of the product with important information

User Manual Detailed product description with implementation instructions, usage instructions, dangers and safety instructions

Technical Reference Scope of supply (this document)

Table 1-1 Product range




2 System Architecture

The communication between Vector Controller Electric Vehicle Communication Controller (VC-EVCC-P) and CAN-WiFi-GW (CWG) is CAN-based. The communication between CWG and Electric Vehicle Supply Equipment (EVSE) is WiFi-based. In this context, the VC-EVCC-P is also referred to as host controller.

Figure 2-1 System Overview

After establishment of the WiFi connection the charging communication between the EVSE and the vehicle (via VC-EVCC-P) starts. As part of the charging sequence the EVSE connects the inverted pantograph to the DC rails of the vehicle.

If the charging sequence is finished or interrupted the EVSE knows when to retract the inverted pantograph from the vehicle due to the established communication connection.

The CWG must only be operated together with a host control unit that has been explicitly approved by Vector. The CWG can be implemented in an available infrastructure. The configuration of the required parameters is done by the host controller.




3 ECU

This chapter contains an overview about the CWG.

Figure 3-1 Product overview

1. 5-pin plug: CAN/ Power

2. Sealing cap (opening not permitted)

3. Customer-specific product label

4. LED (not used)

5. Housing

6. Installation holes

7. RF antenna connection

8. Type plate of Proemion

9. Type plate of Vector Informatik GmbH

3.1 Mechanic specifications

Dimensions width / height / depth [mm] 59 / 75 / 33.5

Color Black

Degree of protection IP 65

The degree of protection IP65 can only be guaranteed when all connections of the device are fitted with connectors or their corresponding protective caps. The device must not be exposed to direct weathering and must not be installed hanging in a negative z-direction [1] .

Temperature range -30 °C to +75 °C

Weight 65 grams

Standard housing Ultramid® C3U BK 23079 PA6/66 FR

3.2 Electrical specifications

DC supply voltage range 8 … 32 V

Current consumption at 24 V < 80 mA

Current consumption in sleep mode < 1 mA

Power consumption < 2 W

Controller 32-bit micro controller Cortex M4




3.3 Interfaces

CAN (number, ISO) 1x ISO 11898-2 (high-speed)

CAN – specification 2.0 A/B

CAN Bus termination 120 Ohm integrated

WiFi IEEE 802.11a: 54 Mbit/s

IEEE 802.11n (20 MHz channel): MCS 0-7 (SISO): 65 Mbit/s

Encryption WPA, WPA2, WEP64/128, PEAP

RF - output power WiFi 5 GHz + 20 dBm (external antenna)

Antenna connection RP-SMA female

3.4 Input/ Output of the 5-pin plug: CAN/ Power

Figure 3-2 Input/ Output Signals

> This CAN/Power connector can be ordered directly from Vector Informatik GmbH under the article number 89511.

3.5 Antenna

In order to comply with the European Radio Equipment Directive (Directive 2014/53/EU), Vector has proven the conformity of the controller when using the following antenna setup, see [1]:

> Attenuator: ≥20 dB (5 GHz, 50 Ohm)

> Antenna cable length: ≥1 m

> Antenna: HUBER+SUHNER 1354.17.0001




4 Software

The software is divided into the following memory blocks:

Figure 4-1 Memory Blocks/ Features

4.1 Bootloader

The CWG contains only one bootloader stage that is based on a master slave concept developed by Vector. The CWG is the slave, while the EVCC (Host) is the master. The main purpose of the bootloader is to update

a) The application software of the CWG executed on the Micro Controller Unit (MCU)

b) The firmware of the u-blox chip connected to the MCU

To ensure that only valid software is executed checksums are used.

4.2 Application

The application consists of two major features:

1. Initialization of the u-blox chip

2. Transferring data between CAN and the u-blox chip

The data transfer is realized via a propriety protocol on top of CAN TP.

Additionally, the application has several minor features:

- Power supply voltage monitoring

- Host controlled state management

- Watchdog




5 Qualification

The CWG is not tested and qualified according to automotive standards.




6 Certification

Vector Informatik GmbH is ISO 9001:2010 certified. The ISO standard is a globally recognized quality standard.

The controller satisfies the requirements of the Radio Equipment Directive (RED) 2014/53/EU

> Safety & Health (Article 3.1 a)

> EN 60950-1:2006+A11:2009+A1:2010+A12:2011+AC:2011+A2:2013

> EN 62311:2008

> EMC (Article 3.1 b)

> EN 301 489-1 V2.1.1 FINAL DRAFT

> EN 301 489-17 V3.1.1 FINAL DRAFT

> Radio Spectrum Efficiency (Article 3.2)

> EN 301 893 V2.1.1

> EN 300 440 V2.1.1

Detailed information is available in [1].




7 Restrictions of usage (EU member states)

The CWG can be used in the countries mentioned below with the following restrictions: Operation outdoors is impermissible when transmitting on the WiFi frequency band of 5.15 to 5.35 GHz see [1].

Belgium (BE), Bulgaria (BG) Czech Republic (CZ)

Denmark (DK) Germany (DE) Estonia (EE)

Ireland (IE) Greece (EL) Spain (ES)

France (FR) Croatia (HR) Italy (IT)

Cyprus (CY) Latvia (LV) Lithuania (LT)

Luxemburg (LU) Hungary (HU) Malta (MT)

Netherlands (NL) Austria (AT) Poland (PL)

Portugal (PT) Romania (RO) Slovenia (SI)

Slovakia (SK) Finland (FI) Sweden (SE)

United Kingdom (UK) Switzerland (CH) Liechtenstein (LI)

Norway (NO) Iceland (IS) Turkey (TR)




8 Glossary and Abbreviations

8.1 Abbreviations & Glossary

Term Description

CAN Controller Area Network

CWG CAN-WiFi-GW

ECU Electronic Controller Unit

EVCC Electric Vehicle Charge Controller

EVSE Electric Vehicle Supply Controller

GW Gateway

MCU Micro Controller Unit

VC-EVCC-P Vector Controller – Electric Vehicle Communication Controller – Pantograph

WLAN (WiFi) Wireless Local Area Network