NB/T 33007-2013Communication Protocol Between Monitoring System in Electric Vehicle Charging Station/Battery Swap Station and Charging/Battery Swap Equipment (English PDF)

3.1 Frame

Protocol data unit of the data link layer.

3.2 Messages

The data unit exchanged and transmitted in the network, which contains the complete data information to be sent.

3.3 Transmission control protocol

A connection-oriented, reliable, byte-based transmission-layer communication protocol, abbreviated as TCP.

3.4 Internet protocol

A protocol designed to connect the computer network for communication, abbreviated as lP.

3.5 APDU

Application protocol data unit, as detailed in clause 5.1.

3.6 APCI

Application protocol control information, as detailed in clause 5.2.

3.7 ASDU

Application service data unit, as detailed in clause 5.1.

3) Number of information-bodies: bit0 ~ bit6 indicate the number of power metrics; bit7 = 1 indicates that the information-body's address is continuous;

4) Information-body structure: Information-body's address 00 00 00 (address of starting power metric)

d) For the sub-box charger, the battery box's identification information shall also be up-sent. See 6.3.1.3 for details. […]

6.2.3 Signal reset message

The monitoring system sends a signal reset command:

a) Frame type number: 04;

b) Reason for transmission: 03;

c) Number of information-bodies: 0.

6.2.4 Actively up-send message

When there is change data in the charging /battery swap equipment, the change data shall be actively up-sent.

6.2.4.1 Actively up-send telecommand shift message

a) Frame type number: 21;

b) Reason for transmission: 01;

c) Number of information-bodies: bit7 = 0 indicates that the information-body's address is included before each change point; bit0 ~ bit6 indicates the number of changed telecommands;

d) Information-body structure: Information-body's address Information-body 00 00 00 (the first telecommand's address)

The first changed telecommand value (single point information with quality descriptor)

The 7-byte time stamp for the first changed telecommand (milliseconds high, milliseconds low, minutes, hours, days, months, years) equipment, the battery swap equipment needs to make response for confirmation/denial after receiving it;

2) For the charging start/stop telemetry command as issued by the monitoring system to the charging equipment, the charging equipment shall respond confirmation/denial after receiving it.

6.3 Characteristic messages

6.3.1 Characteristic messages of the charging equipment and the monitoring system

6.3.1.1 Charging start/stop message

a) The monitoring system issues a single point tele-control message:

1) Frame type number: 41;

2) Reason for transmission: 03;

3) Number of information-bodies: 1;

4) Information-body structure:

1-byte tele-control nature 01: Start charging; 00: stop charging 1-byte control information Bit7 start conditions 0, instant charging 1, timed charging Bit6 control methods 0, BMS-controlled charging 1, charger-controlled charging bit0 ~ bit5 stop conditions 1, power-volume-controlled charging 2, time-controlled charging 3, money-amount-controlled charging 4, charge to full 4-byte timing time MM HH DD MM (this timing is meaningless for instant charging) 4-byte maximum allowable charging voltage

IEEE 754 short real number (R32.23) 4-byte maximum allowable charging current

IEEE 754 short real number (R32.23) 4-byte control data

IEEE 754 short real number (R32.23), the detailed information of control data is as described below Reserved 1 Reserved 1 Reserved 2 Reserved 3 Reserved 4 Reserved 5 Handling information structure object of battery 1, the definition of which is as detailed below... Handling information structure object of battery N, the definition of which is as detailed below Handling information structure object of battery 16-byte battery unique number (all 0 if no battery)

1-byte battery type Reserved 1 Reserved 2 Reserved 3 Reserved 4 Reserved 5 1-byte source type 0x00 - Not used 0x01 - Electric vehicle 0x02 - Battery rack 0x03 - Charging rack... 2-byte source address number Address low-bit Address high-bit 1-byte object type 0x00 - Not used 0x01 - Electric vehicle 0x02 - Battery rack 0x03 - Charging rack... 2-byte target address number Address low-bit Address high-bit

b) The battery swap equipment responds the confirmation/denial message. See 6.2.5 for details.

6.3.2.2 Command message to remove the battery

a) The monitoring system sends a command:

1) Frame type number: 52;

2) Reason for transmission: 03;

3) Number of information-bodies: 1;

a) The monitoring system sends a command:

1) Frame type number: 56;

2) Reason for transmission: 03;

3) Number of information-bodies: 0.

b) The battery swap equipment responds the confirmation/denial message. See 6.2.5 for details.

6.3.2.7 Command message to terminate

a) The monitoring system sends a command:

1) Frame type number: 57;

2) Reason for transmission: 03;

3) Number of information-bodies: 0.

b) The battery swap equipment responds the confirmation/denial message. See 6.2.5 for details.

6.3.2.8 Command message to initialize

a) The monitoring system sends a command:

1) Frame type number: 58;

2) Reason for transmission: 03;

3) Number of information-bodies: 0.

b) The battery swap equipment responds the confirmation/denial message. See 6.2.5 for details.

6.3.2.9 Command message for parameter setting

a) The monitoring system sends a command:

1) Frame type number: 59;

2) Reason for transmission: 03;

3) Number of information-bodies: 1;

4) Information-body structure: Information-body's address 00 00 00

Information-body's address 00 00 00 Information-body Tele-control point No., which indicates the charging port (one-pile multi-charging type)

A.1 Single point information with quality descriptors (IEV 371-02-07) (SIQ)

SIQ: = CP8{SPI, RES, BL, SB, NT, IV} SPI = Single point information: = BS1[1]< 0..1> (TYPE 6)

< 1>: = Close RES=RESERVE: = BS3[2...4] < 0> (TYPE 6) BL: = BS1[5] < 0...1> (TYPE 6)

< 0>: = Unblocked < 1>: = Blocked SB: = BS1[6] < 0...1> (TYPE 6)

< 0>: = Unsubstituted < 1>: = Substituted NT: = BS1[7] < 0...1> (TYPE 6)

< 0>: = Current value < 1>: = Non-current value IV: = BS1[8] < 0...1> (TYPE 6) < 0>: = Valid < 1>: = Invalid

A.2 Quality descriptor (single octet) (QDS)

NT = current value / non-current value If the most recent refresh succeeds, the value is called the current value. If the refresh is unsuccessful within a specified time interval or its value is not available, the value is called a non-current value.

IV = valid / invalid If the value is validly collected, it is valid. If the acquisition function confirms the abnormal state of the information source (loss or non-work refresh device), the value is invalid. The value of the information object is not defined under these conditions and is identified as invalid to remind the user that this value is incorrect and cannot be used.

A quality descriptor is composed of five quality bits, which can be set independently of each other. The quality descriptor provides the control station with additional information on the quality of the information object.

The information object's quality descriptors are transparently passed through the monitoring system (from data collection to the communication interface) and must not be modified by the intermediate equipment.

Example 1: Since the field interface is in test mode, the circuit breaker status is blocked, in which case the quality descriptor (BL = 1 "blocked") will be transmitted unchanged from the field interface, through all layers of the system to the control station.

Example 2: When the data acquisition is disturbed, the measured value will be automatically or manually assigned a substitute value, the substituted measured value is transmitted together with the quality bit SB=1 "substituted".

If the information object value is marked with a new quality descriptor for a particular condition, the quality descriptor will be reset dynamically or automatically when the condition changes.

A change in the quality descriptor each time will initiate a burst transmission of the affected information object. When a time-stamped information object is transmitted, its time stamp is the time at which the quality descriptor changes.

The station calling process calls all information objects, which are defined by a particular call group and are independent of the content of the quality descriptor.

When the information object is called, the quality descriptor contains the most recent state. This ensures that the integrity check can be implemented at the control station. […]

A.3 Scaled value (SVA)