QC/T 1088-2017Specifications for charge-discharge motor controllers of electric vehicles (English PDF)

3.1 Charge-discharge motor controller

an integrated device that is fixedly installed on electric vehicles, which can drive motor, realize vehicle charging, and discharging for external load (including grid)

3.2 G2V mode (grid to vehicle mode)

a mode that the power grid supplies power to the vehicle energy storage device through the controller

3.3 V2G mode (vehicle to grid mode)

a mode that the vehicle energy storage device supplies power to the grid through the controller

3.4 V2L mode (vehicle to load mode)

a mode that the vehicle energy storage device supplies power to other loads outside the vehicle through the controller

4.1 General requirements

4.1.1 The controller shall have the communication and fault diagnosis functions required by the vehicle.

4.1.2 The technical requirements of the controller in drive motor mode can be …

4.2 Electrical performance

4.2.1 Operating voltage

4.2.1.1 When the voltage of the vehicle power battery is within the specified range, the output current harmonic of the controller in V2G mode shall meet the requirements of GB/Z 17625.6-2003. The DC current component shall not exceed 1% of its AC rating.

4.2.2 Frequency range

4.2.2.1 In V2G mode, the frequency change of the grid-connected voltage is in the range of 50Hz ± 1Hz.

4.2.2.2 In V2L mode, the controller can output voltage frequency in the range of 50Hz ±1Hz.

4.2.2.3 In V2V mode, the controller can output voltage frequency in the range of 50Hz ±1Hz.

4.2.3 Output current steady-state error

In the constant current charging or discharging mode, when the output current is less than or equal to 10A, the error to the set current shall be no more than 0.5A. When the output current is greater than 10 A, the error to the set current shall be no more than 5%.

4.2.6 Electrical safety requirements

4.2.6.1 Insulation resistance

The cold state and thermal insulation resistance between the high voltage terminal of the controller and the outer casing, high voltage terminal and signal terminal shall not be less than 1Mohm.

4.2.6.4 Grounding protection

The grounding point of the controller shall have an obvious grounding mark.

4.2.7 Active discharging and passive discharging

The active discharging and passive discharging of the controller shall meet the requirements of 5.5.3 of GB/T 18488.1-2015.

4.2.8 Overload protection

When the controller is in V2G, V2L and V2V modes, the overload capacity shall meet: the controller has a continuous current and reliable working time of no less than 1min under 110% rated load; the continuous and reliable operation at 125% rated load current is not less than 10s.

4.2.9 Charging and discharging

Under the specified product technical conditions, the controller shall have the following functions.

4.2.10 Protective function

4.2.10.1 Overcurrent protection

The controller shall be overcurrent protected when the specified current is exceeded.

4.2.10.6 Reverse protection

In the charging or discharging mode, when the DC terminal of the controller is connected to the positive and negative poles of the vehicle energy storage device, it shall not start and give a prompt after power-on. After troubleshooting, the controller shall work properly.

4.2.10.7 Anti-islanding protection

In V2G mode, when the grid system incorporated by the controller system loses pressure, the controller system must be disconnected from the grid within the specified time limit to prevent islanding.

At least one active and passive anti-islanding protection shall be set.

4.2.10.8 Restore of V2G mode

After the controller stops the V2G mode due to the over-limit state, the controller shall not send power to the grid after the grid voltage and frequency return to the normal range for 20s to 5min.

4.3 Electromagnetic compatibility

The electromagnetic compatibility of the controller in charging or discharging mode shall meet the requirements of QC/T 895-2011.

4.4 Environmental adaptability

The environmental adaptability of the controller shall meet the requirements of GB/T 18488.1-2015.

5.1 Test conditions

5.1.1 Environmental conditions

The test environmental conditions are required to be.

5.1.2 Measuring apparatus and instrument

5.1.2.1 Scope

All measuring instrument ranges shall be able to effectively cover the range to be measured. All measuring instrument ranges shall be changed with the measured resistance, voltage or current. The pointer or meter reading shall be within the measuring range.

5.2 Electrical performance

5.2.1 Operating voltage

Make the controller work in the drive motor mode and the charging or discharging mode, adjust each input voltage. The controller shall be operated for 1min under the conditions of 4.2.1 respectively.

5.2.2 Frequency range

Put the controller in charging or discharging mode and operate with power to adjust the grid frequency. The controller shall be operated for 1min under the conditions of 4.2.2.

5.2.6 Electrical safety requirements

5.2.6.1 Insulation resistance

The test method is carried out according to the test method of 5.7.5 of GB/T 18488.2-2015.

5.2.6.2 Withstand voltage

The test method is carried out according to the test method of 5.8.2 of GB/T 18488.2-2015.

5.2.8 Overload protection

The test method is negotiated between the supplier and the purchaser.

5.2.9 Charging and discharging

The test method is negotiated between the supplier and the purchaser.

5.2.10 Protective function

The test method is negotiated between the supplier and the purchaser.

5.3 Electromagnetic compatibility

The test method is carried out in accordance with the test method in QC/T 895-2011.

5.4 Environmental adaptability

The test method is carried out according to the test method in GB/T 18488.2-2015.

6.1 Exit-factory inspection

The controller must perform the inspection test of the following items. See Table 1 for the inspection test items.

6.2 Type inspection

6.2.1 Inspection conditions

Type inspection shall be performed in one of the following situations.

6.2.2 Sampling

The sample for type inspection shall be extracted from the products inspected qualified of exit-factory inspection. The sampling quantity can be negotiated with the host factory.

6.2.3 Test item

See Table 2 for type inspection items.

7.1 Lead wire and terminal

Each power line or terminal of the controller shall have obvious signs. The positive and negative poles of the controller's power input interface are marked with "+" and "-" respectively. The power line or power terminal corresponding to each of the controller and the motor shall be consistent with the signs of the power line or terminal of each phase of the motor.

7.2 Controller nameplate

The controller nameplate shall include the following information.

7.3 Hazard warning

The controller shall indicate the words "high voltage hazard" in a prominent position. The example is as shown in Figure 1.And indicate the necessary safety instructions next to the words "high voltage hazard".

8.1 Marks

8.2.2

The packing box shall be firm. The product shall not be shaken in the box, and it shall not be damaged by machinery during transport, loading and unloading, and can be protected from moisture, corrosion, vibration and dust.

The technical documents supplied with the product in the packing box shall include packing list, product exit-factory certificate, product instruction manual, and list of spare parts. The outside of the box shall be marked.

8.3 Storage and maintenance

The product shall be stored and maintained in a clean, dry and well-ventilated environment at 5°C ~ 40°C. Avoid sun, fire, and water. At the same time avoid being placed with corrosive substances.

8.4 Loading-unloading, transport

The impact and vibration of the product during handling shall be limited to a minimum.

A.1 V2L control guiding circuit and control principle

When the electric vehicle is in V2L mode (the vehicle is a "discharge vehicle"), use the control guiding circuit shown in Figure A.1 to perform the connection confirmation of discharging connection device as well as the determination of rated current parameters. The circuit consists of discharging control device, controller, R4, RC and S3.Wherein the discharging control device can be integrated in the controller or other onboard control unit. The vehicle interface shall comply with the provisions of GB/T 20234. The RC resistance of the discharging connection device shall comply with the requirements of Table A.1.