IEC TS 61851-3-6:2023

Electric vehicles conductive charging system - Part 3-6: DC EV supply equipment where protection relies on double or reinforced insulation - Voltage converter unit communication

IEC TS 61851-3-6:2023 This part of IEC 61851, which is a Technical Specification, applies to CANopen communication for the conductive transfer of electric power between the supply network and an electric road vehicle or a removable RESS or traction-battery of an electric road vehicle.
This document provides application objects provided by the AC/DC VCU or DC/DC VCU.

General Information

• Status: Published
• Publication Date: 17-Jul-2023
• ICS: 43.120 - Electric road vehicles
• Technical Committee: TC 69 - Electrical power/energy transfer systems for electrically propelled road vehicles and industrial trucks
• Drafting Committee: WG 10 - TC 69/WG 10
• Current Stage: PPUB - Publication issued
• Start Date: 18-Jul-2023
• Completion Date: 01-Nov-2022

Overview

IEC TS 61851-3-6:2023 is a Technical Specification in the IEC 61851 family that defines CANopen communication for conductive DC charging where protection relies on double or reinforced insulation. It specifies the communication and object model for the Voltage Converter Unit (VCU) - including AC/DC and DC/DC VCU functions - enabling standardized data exchange between the supply network, DC EV supply equipment and removable RESS/traction batteries during conductive charging.

Keywords: IEC TS 61851-3-6, CANopen communication, electric vehicle charging, DC EV supply equipment, VCU communication, conductive charging system.

Key Topics

• Scope and purpose: Communication profile for DC EV supply equipment using CANopen to manage power transfer and protective insulation scenarios.
• Finite State Automaton (FSA): State definitions, transitions and events for VCU behaviour during charging sequences.
• Object dictionary & application objects: Detailed produced and consumed CANopen application objects (examples in the spec include objects 6001/6002, 60A0, and many 60xx indices) to report capabilities, setpoints, limits, counters and status.
• AC/DC and DC/DC converter objects: Parameters and telemetry for converter capability, AC/DC and DC/DC voltages, currents, power limits, counters (Ah/Wh), and temperature/overload indicators.
• Power transfer control: Objects and setpoints for requesting and limiting charging/discharging power, and for coordinating connected battery system data (voltage, capacity, temperature, Node-ID).
• Stationary application setpoints: Frequency, current, voltage and reactive power control objects for fixed installations.
• Interoperability focus: Ensures consistent semantics and object structures for VCU communication across vendors.

Applications

Who uses IEC TS 61851-3-6 and why:

• EV charging equipment manufacturers and VCU designers - to implement CANopen communication and object dictionaries for interoperable DC charging.
• Automotive OEMs and battery system integrators - to ensure safe, coordinated power transfer with removable RESS or traction batteries.
• Charging network operators and system integrators - for consistent monitoring, control and diagnostics of DC EV supply equipment.
• Test labs and certification bodies - to validate compliance with defined object models, FSA behaviour and communication flows.

Practical benefits include improved interoperability of VCUs and battery systems, clearer power/limit signalling, and standardized telemetry for operations and diagnostics.

Related standards

• IEC 61851 series (conductive charging system)
• CANopen communication profiles (used as the transport/profile layer)

For implementers, IEC TS 61851-3-6 provides the CANopen object definitions and state logic required to integrate VCUs into modern DC EV charging ecosystems while maintaining safety and interoperability.

Standards Content (Sample)

IEC TS 61851-3-6 ®
Edition 1.0 2023-07
TECHNICAL
SPECIFICATION
Electric vehicles conductive charging system –
Part 3-6: DC EV supply equipment where protection relies on double or
reinforced insulation – Voltage converter unit communication
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IEC TS 61851-3-6 ®
Edition 1.0 2023-07
TECHNICAL
SPECIFICATION
Electric vehicles conductive charging system –

Part 3-6: DC EV supply equipment where protection relies on double or

reinforced insulation – Voltage converter unit communication

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 43.120 ISBN 978-2-8322-5752-4

– 2 – IEC TS 61851-3-6:2023  IEC 2023
CONTENTS
FOREWORD . 10
INTRODUCTION . 12
1 Scope . 13
2 Normative references . 13
3 Terms and definitions . 13
4 Symbols and abbreviated terms . 13
5 Operating principles . 14
5.1 General . 14
5.2 Voltage converter unit specific FSA . 14
5.3 State definitions . 15
5.4 Transitions in the FSA for VCUs . 17
6 Object dictionary. 18
6.1 General . 18
6.2 Additional definitions to general application objects . 18
6.2.1 General . 18
6.2.2 Object 6001 : Control word . 18
h
6.2.3 Object 6002 : Status word . 18
h
6.3 Produced application objects by AC-DC converter functionality (mandatory) . 19
6.3.1 General . 19
6.3.2 Object 60A0 : AC-DC converter capability . 19
h
6.4 Produced application objects by AC-DC converter (optional) . 23
6.4.1 General . 23
6.4.2 Object 60A1 : AC-DC converter minimum AC voltage . 23
h
6.4.3 Object 60A2 : AC-DC converter maximum AC voltage. 24
h
6.4.4 Object 60A3 : AC-DC converter maximum AC current . 26
h
6.4.5 Object 60A4 : AC-DC converter maximum AC power . 28
h
6.4.6 Object 60AA : AC-DC converter power transfer time . 29
h
6.4.7 Object 60AB : AC-DC converter discharging power transfer time . 31
h
6.4.8 Object 60AC : AC-DC converter power transfer Ah counter . 32
h
6.4.9 Object 60AD : AC-DC converter discharging Ah counter . 34
h
6.4.10 Object 60AE : AC-DC converter power transfer Wh counter . 36
h
6.4.11 Object 60AF : AC-DC converter discharging Wh counter . 37
h
6.4.12 Object 60B0 : AC-DC converter actual AC voltage . 39
h
6.4.13 Object 60B1 : AC-DC converter actual AC current . 40
h
6.4.14 Object 60B2 : AC-DC converter actual AC power . 42
h
6.4.15 Object 60B3 : AC-DC converter power transfer count number . 44
h
6.4.16 Object 60B4 : AC-DC converter discharging count number . 45
h
6.4.17 Object 60B5 : AC-DC converter temperature switch off counter . 47
h
6.4.18 Object 60B6 : AC-DC converter short cuts switch off counter . 48
h
6.4.19 Object 60B7 : AC-DC converter minimum DC voltage . 50
h
6.4.20 Object 60B8 : AC-DC converter maximum DC voltage . 52
h
6.4.21 Object 60B9 : AC-DC converter maximum DC current . 53
h
6.4.22 Object 60BA : AC-DC converter maximum DC power . 55
h
6.5 Produced application objects by voltage converter unit (optional). 56
6.5.1 General . 56
6.5.2 Object 60A5 : VCU position and class . 56
h
6.5.3 Object 60D0 3P topology DC1 positive voltage . 59
h
6.5.4 Object 60D1 3P topology DC1 negative voltage . 61
h
6.5.5 Object 60D2 3P topology DC2 positive voltage . 62
h
6.5.6 Object 60D3 3P topology DC2 negative voltage . 64
h
6.5.7 Object 60D4 Overload capability DC1 . 65
h
6.5.8 Object 60D5 Overload capability DC2 . 67
h
6.5.9 Object 60D6 Overload capability AC1 . 69
h
6.5.10 Object 60D7 Overload capability AC2 . 71
h
6.5.11 Object 60D8 VCU frequency thresholds AC1 . 72
h
6.5.12 Object 60D9 VCU frequency thresholds AC2 . 74
h
6.5.13 Object 60DA Maximum L1 apparent power AC1 . 76
h
6.5.14 Object 60DB Maximum L2 apparent power AC1 . 77
h
6.5.15 Object 60DC Maximum L3 apparent power AC1 . 79
h
6.5.16 Object 60DD Maximum L1 apparent power AC2 . 81
h
6.5.17 Object 60DE Maximum L2 apparent power AC2 . 82
h
6.5.18 Object 60DF Maximum L3 apparent power AC2 . 84
h
6.5.19 Object 60E1 Maximum L1 real power AC1 . 85
h
6.5.20 Object 60E2 Maximum L2 real power AC1 . 87
h
6.5.21 Object 60E3 Maximum L3 real power AC1 . 89
h
6.5.22 Object 60E4 Maximum L1 real power AC2 . 90
h
6.5.23 Object 60E5 Maximum L2 real power AC2 . 92
h
6.5.24 Object 60E6 Maximum L3 real power AC2 . 93
h
6.5.25 Object 60E7 Maximum L1 reactive power AC1 . 95
h
6.5.26 Object 60E8 Maximum L2 reactive power AC1 . 97
h
6.5.27 Object 60E9 Maximum L3 reactive power AC1 . 98
h
6.5.28 Object 60EA Maximum L1 reactive power AC2 . 100
h
6.5.29 Object 60EB Maximum L2 reactive power AC2 . 101
h
6.5.30 Object 60EC Maximum L3 reactive power AC2 . 103
h
6.5.31 Object 60ED Maximum L1 current AC1 . 105
h
6.5.32 Object 60EE Maximum L2 current AC1 . 106
h
6.5.33 Object 60EF Maximum L3 current AC1 . 108
h
6.5.34 Object 609A Maximum L1 current AC2. 109
h
6.5.35 Object 609B Maximum L2 current AC2. 111
h
6.5.36 Object 609C Maximum L3 current AC2 . 113
h
6.5.37 Object 609D Maximum N current AC1 . 114
h
6.5.38 Object 609E Maximum N current AC2 . 116
h
– 4 – IEC TS 61851-3-6:2023  IEC 2023
6.5.39 Object 603F : DC-DC converter actual current side B . 117
h
6.5.40 Object 6041 : DC-DC converter actual voltage side B . 119
h
6.6 Consumed application objects by AC-DC converter (optional) . 121
6.6.1 General . 121
6.6.2 Object 60BE : AC-DC converter set maximum AC power . 121
h
6.7 Consumed application objects for power transfer . 122
6.7.1 General . 122
6.7.2 Object 60F0 : Connected battery systems data - Instance . 122
h
6.7.3 Object 60F1 : Connected battery system data - Node-ID . 125
h
6.7.4 Object 60F2 : Connected battery system data - Device alarm capability
h
(optional) . 126
6.7.5 Object 60F3 : Connected battery system data - Type of battery cells . 128
h
6.7.6 Object 60F4 : Connected battery system data - Battery system rated
h
Wh capacity . 130
6.7.7 Object 60F5 : Connected battery system maximum voltage . 131
h
6.7.8 Object 60F6 : Connected battery system minimum voltage . 132
h
6.7.9 Object 60F7 : Connected battery system maximum input current during
h
charge . 133
6.7.10 Object 60F8 : Requested battery system charge limit . 134
h
6.7.11 Object 60F9 : Connected battery system data - maximum charge
h
temperature (optional) . 136
6.7.12 Object 60FA : Connected battery system data - Battery system
h
minimum charge temperature (optional) . 137
6.7.13 Object 60FB : Connected battery system data - Device alarm status
h
(optional) . 138
6.7.14 Object 60FC : Connected battery system data - Control word . 140
h
7 Consumed application objects by VCU in stationary applications (optional) . 141
7.1 General . 141
7.2 Object 60BF : Frequency setpoint AC1. 141
h
7.3 Object 60C0 : Frequency setpoint AC2. 142
h
7.4 Object 60C4 : Current setpoint AC1 . 143
h
7.5 Object 60C1 : Current setpoint AC2 . 145
h
7.6 Object 60C2 : Voltage setpoint AC1 . 146
h
7.7 Object 60C3 : Voltage setpoint AC2 . 147
h
7.8 Object 60A8 : Reactive power control . 148
h
7.9 Object 60A9 : Power limitation setpoint . 150
h
7.10 Object 60AA : Constant reactive power setpoint . 151
h
7.11 Object 60AB : Constant power factor cos ϕ setpoint . 152
h
7.12 Object 60AC : Characteristic curve cos ϕ (P ) . 154
h N
7.13 Object 60AD : Characteristic curve Q(U) . 157
h
Bibliography . 162

Figure 1 – FSA for voltage converter unit . 15
Figure 2 – Value structure . 19

Figure 3 – Object structure . 57
Figure 4 – Object structure . 65
Figure 5 – Object structure . 67
Figure 6 – Object structure . 69
Figure 7 – Object structure . 71
Figure 8 – Object structure . 72
Figure 9 – Object structure . 74
Figure 10 – Object structure supported virtual devices (informative) . 122
Figure 11 – Object structure (informative) . 126
Figure 12 – Object structure constant reactive power setpoint . 151
Figure 13 – Object structure constant reactive power setpoint . 153
Figure 14 – Object structure fitting point . 154
Figure 15 – Object structure power factor . 155
Figure 16 – Object structure fitting point control . 158

Table 1 – States behaviour . 16
Table 2 – Transitions, events and actions . 17
Table 3 – Value definition for VD specific FSA control. 18
Table 4 – Value definition for virtual device FSA state . 19
Table 5 – Value definition . 20
Table 6 – Object description . 21
Table 7 – Entry description . 21
Table 8 – Object description . 23
Table 9 – Entry description . 23
Table 10 – Object description . 25
Table 11 – Entry description . 25
Table 12 – Object description . 26
Table 13 – Entry description . 26
Table 14 – Object description . 28
Table 15 – Entry description . 28
Table 16 – Object description . 29
Table 17 – Entry description . 30
Table 18 – Object description . 31
Table 19 – Entry description . 31
Table 20 – Object description . 33
Table 21 – Entry description . 33
Table 22 – Object description . 34
Table 23 – Entry description . 34
Table 24 – Object description . 36
Table 25 – Entry description . 36
Table 26 – Object description . 37
Table 27 – Entry description . 38
Table 28 – Object description . 39

– 6 – IEC TS 61851-3-6:2023  IEC 2023
Table 29 – Entry description . 39
Table 30 – Object description . 41
Table 31 – Entry description . 41
Table 32 – Object description . 42
Table 33 – Entry description . 42
Table 34 – Object description . 44
Table 35 – Entry description . 44
Table 36 – Object description . 45
Table 37 – Entry description . 46
Table 38 – Object description . 47
Table 39 – Entry description . 47
Table 40 – Object description . 49
Table 41 – Entry description . 49
Table 42 – Object description . 50
Table 43 – Entry description . 50
Table 44 – Object description . 52
Table 45 – Entry description . 52
Table 46 – Object description . 53
Table 47 – Entry description . 54
Table 48 – Object description . 55
Table 49 – Entry description . 55
Table 50 – Value definition . 57
Table 51 – Object description . 58
Table 52 – Entry description . 58
Table 53 – Object description . 59
Table 54 – Entry description . 59
Table 55 – Object description . 61
Table 56 – Entry description . 61
Table 57 – Object description . 62
Table 58 – Entry description . 63
Table 59 – Object description . 64
Table 60 – Entry description . 64
Table 61 – Object description . 66
Table 62 – Entry description . 66
Table 63 – Object description . 67
Table 64 – Entry description . 68
Table 65 – Object description . 69
Table 66 – Entry description . 69
Table 67 – Object description . 71
Table 68 – Entry description . 71
Table 69 – Object description . 73
Table 70 – Entry description . 73
Table 71 – Object description . 74

Table 72 – Entry description . 75
Table 73 – Object description . 76
Table 74 – Entry description . 76
Table 75 – Object description . 78
Table 76 – Entry description . 78
Table 77 – Object description . 79
Table 78 – Entry description . 79
Table 79 – Object description . 81
Table 80 – Entry description . 81
Table 81 – Object description . 82
Table 82 – Entry description . 83
Table 83 – Object description . 84
Table 84 – Entry description . 84
Table 85 – Object description . 86
Table 86 – Entry description . 86
Table 87 – Object description . 87
Table 88 – Entry description . 87
Table 89 – Object description . 89
Table 90 – Entry description . 89
Table 91 – Object description . 90
Table 92 – Entry description . 91
Table 93 – Object description . 92
Table 94 – Entry description . 92
Table 95 – Object description . 94
Table 96 – Entry description . 94
Table 97 – Object description . 95
Table 98 – Entry description . 95
Table 99 – Object description . 97
Table 100 – Entry description . 97
Table 101 – Object description. 98
Table 102 – Entry description . 99
Table 103 – Object description. 100
Table 104 – Entry description . 100
Table 105 – Object description. 102
Table 106 – Entry description . 102
Table 107 – Object description. 103
Table 108 – Entry description . 103
Table 109 – Object description. 105
Table 110 – Entry description . 105
Table 111 – Object description. 106
Table 112 – Entry description . 107
Table 113 – Object description. 108
Table 114 – Entry description . 108

– 8 – IEC TS 61851-3-6:2023  IEC 2023
Table 115 – Object description. 110
Table 116 – Entry description . 110
Table 117 – Object description. 111
Table 118 – Entry description . 111
Table 119 – Object description. 113
Table 120 – Entry description . 113
Table 121 – Object description. 114
Table 122 – Entry description . 115
Table 123 – Object description. 116
Table 124 – Entry description . 116
Table 125 – Object description. 118
Table 126 – Entry description . 118
Table 127 – Object description. 119
Table 128 – Entry description . 119
Table 129 – Object description. 121
Table 130 – Entry description . 121
Table 131 – Value definition for bit fields (informative) . 122
Table 132 – Object description. 124
Table 133 – Entry description . 124
Table 134 – Value definition. 125
Table 135 – Object description. 125
Table 136 – Entry description . 125
Table 137 – Value definition (informative) . 126
Table 138 – Object description. 127
Table 139 – Entry description . 128
Table 140 – Object description. 129
Table 141 – Entry description . 129
Table 142 – Object description. 130
Table 143 – Entry description . 130
Table 144 – Object description. 131
Table 145 – Entry description . 131
Table 146 – Object description. 132
Table 147 – Entry description . 132
Table 148 – Object description. 133
Table 149 – Entry description . 134
Table 150 – Value definition. 135
Table 151 – Object description. 135
Table 152 – Entry description . 135
Table 153 – Object description. 136
Table 154 – Entry description . 136
Table 155 – Object description. 137
Table 156 – Entry description . 138
Table 157 – Object description. 139

Table 158 – Entry description . 139
Table 159 – Object description. 140
Table 160 – Entry description . 140
Table 161 – Object description. 141
Table 162 – Entry description . 141
Table 163 – Object description. 142
Table 164 – Entry description . 143
Table 165 – Object description. 144
Table 166 – Entry description . 144
Table 167 – Object description. 145
Table 168 – Entry description . 145
Table 169 – Object description. 146
Table 170 – Entry description . 146
Table 171 – Object description. 147
Table 172 – Entry description . 147
Table 173 – Value definition for reactive power control . 148
Table 174 – Object description. 149
Table 175 – Entry description . 149
Table 176 – Object description. 150
Table 177 – Entry description . 150
Table 178 – Value definition for constant reactive power setpoint . 151
Table 179 – Object description. 151
Table 180 – Entry description . 152
Table 181 – Value definition for constant reactive power setpoint . 153
Table 182 – Object description. 153
Table 183 – Entry description . 153
Table 184 – Value definition fitting point control . 155
Table 185 – Value definition for constant reactive power setpoint . 155
Table 186 – Object description. 155
Table 187 – Entry description . 155
Table 188 – Value definition fitting point control . 158
Table 189 – Object description. 158
Table 190 – Entry description . 158

– 10 – IEC TS 61851-3-6:2023  IEC 2023
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRIC VEHICLES CONDUCTIVE CHARGING SYSTEM –

Part 3-6: DC EV supply equipment where protection relies on double or
reinforced insulation – Voltage converter unit communication

FOREWORD
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