QC/T 1023-2015General requirements for traction battery systems of electric vehicles (English PDF)

3.1 Traction battery

It refers to the assembly which is used to contain the battery pack, the battery management module, and the corresponding auxiliary components, AND is composed of mechanical connection, electrical connection, protection and other functions. It is shortly referred to as the battery box.

3.2 Traction battery pack

It refers to the unit which usually contains a battery module, a battery management module (not including BCU), a battery box, and the corresponding accessories, AND is able to obtain electric power from outside AND to output power to outside.

3.3 Swapping traction battery pack

It refers to a battery pack that can be installed in an electric vehicle within a short period of time (typically no more than 5 minutes) by means of human or mechanical assistance AND is capable of charging its installed battery in an off-board condition.

5.2 General requirements

5.2.1 The traction battery system shall have information collection, information transmission, and security monitoring function.

5.2.2 The traction battery system shall be easy to check and repair.

5.2.5 The traction battery system shall have a certain degree of anti-electromagnetic interference, AND its work shall not affect the operation of other electrical equipment.

5.4 Electrical performance

5.4.3 Traction battery system energy (kW · h)

When the traction battery system is tested in accordance with 8.5.1, its energy shall be not less than the manufacturer's nominal value.

5.4.4 Traction battery system capacity (A · h)

When the traction battery system is tested in accordance with 8.5.2, its capacity shall be neither less than the manufacturer's nominal value, NOR more than 110% of the manufacturer's nominal value.

5.5 Safety requirements

5.5.1 IP protection degree

After the tests of 8.6.1.1 and 8.6.1.2, the protection degree of the traction battery system not be lower than IP55.

5.5.4 Overcurrent protection

When the output current of the traction battery system rises up to the set overcurrent value, it shall limit the discharge power of the battery system OR otherwise require the vehicle control ECU to perform power limit, AND meanwhile it is preferable for the battery system to be able to output alarm signal.

5.5.5 Overtemperature protection

When the traction battery system temperature reaches up to the overtemperature protection value, it shall limit the discharge power of the battery system OR otherwise require the vehicle control ECU to perform power limit, AND meanwhile it is preferable for the battery system to be able to output alarm signal.

5.5.6 Shielding/enclosure

The shielding and enclosure of the traction battery system shall comply with the requirements of 6.3 in GB/T 18384.3-2001.

5.6 Mechanical strength

5.6.1 Vibration strength

After the traction battery system is tested in accordance with 8.4.1, it shall be free from mechanical damage, deformation, or loosening of the fastening parts, or the damage of the locking device.

5.6.2 Impact strength

After the traction battery system is tested in accordance with 8.4.2, it shall be free from mechanical damage, deformation, or loosening of the fastening parts, or the damage of the locking device.

5.6.3 Locking fixation

As for the battery pack which is fixed by the locking device, the locking device shall be reliable AND have anti-misuse measures.

5.7 Parameter management

5.8.3.4

As for the plug-in type power line connector, the insertion force of a single connector shall be not less than 50 N.

5.8.3.5

The protection degree of the power line connector shall comply with the IP67 requirements.

5.9 Control line requirements

5.9.1 Material requirements

The wiring harness material shall comply with the requirements of QC/T 413.

5.9.2 Harness requirements

The wiring harness shall comply with the requirements of QC/T 417.1. The flame retardant and fire resistance shall comply with the requirements of GB/T 19666.

5.9.3 Connector requirements

The connector of the low-voltage control circuit AND the collection circuit shall comply with the requirements of QC/T 417.1, QC/T 417.3, and QC/T 417.4.

6.1 Assembly of power line and related electrical components

6.1.1 Electrical connection requirements.

6.1.3 Connection of power lines. The connections shall be subjected to surface anti-corrosion treatment.

6.1.4 Safety device layout

The installation location of the safety device of the traction battery system shall be such that the fuse blowing will not cause combustion of other components.

6.2 Assembly of traction battery pack and system

6.2.1 Fixation of traction battery.

6.2.2 The polarity identification of the battery pack. The positive and negative polarity of the traction battery pack shall be identified near the terminal AND clearly visible; the color used for the identification shall comply with the requirements of GB 2893.

6.2.3 Assembly of traction battery.

6.3 Management system installation

6.3.2 Sensing elements

As for the installation of the total current, total voltage and module voltage, temperature and other sensor components, if they cannot be integrated into the corresponding box, it shall take reliable protective measures AND comply with the requirements of 6.3 in GB/T 18384.3-2001.

6.3.3 Acquisition circuit layout

The wiring harness shall be securely secured, the alignment shall be smooth and reliable, AND it shall be reliably isolated from other circuits.

7.1 Component requirements

Traction battery charging interface shall comply with the requirements of GB/T 20234.1, GB/T 20234.2 and GB/T 20234.3.

7.2 Mechanical interface

Mechanical interface shall be accurately positioned and reliably fixed; it is preferable to design it into asymmetric structure; AND it shall comply with the accurate interface joint and mis-installation prevention requirements.

7.3 High power electrical interface

High power electrical interface shall have anti-corrosion function, and has anti-loose measures, AND it shall comply with the reliable power transmission requirements in the process of use.

8.1 Test conditions

8.1.1 Test environmental conditions

Unless otherwise specified, the test shall be conducted under normal environmental conditions.

8.1.3 Instrumentation

Measuring instrumentation and instruments, including the test equipment which is used to monitor the test parameters, shall have qualification certificates; the metering instruments shall have the metering calibration certificate within the valid period. AND the test instrument and equipment precision shall comply with the following requirements.

8.2 Charging of traction battery pack

It shall follow the requirements of the traction battery pack manufacturer to conduct charging.

8.3 Environmental adaptability test

8.3.1 High temperature test

High temperature work test shall be conducted in accordance with the requirements that "Test Bd. high temperature test of temperature gradual change of heat-dissipating sample - The test sample is not energized in the temperature rise regulation period" in GB/T 2423.2-2008. In this test, the high temperature test temperature is taken as 55 °C; AND the test duration is 16 h.

8.4 Mechanical strength test

8.4.1 Vibration test

With reference to the installation position of the tested device in the vehicle, FIX the traction battery system onto the vibration test bench surface; MAKE the locking device in the locked state. CONDUCT vibration test along three directions; the test is started from axis Z, then axis Y, AND finally axis Z. The vibration frequency range is 10 Hz ~ 55 Hz, the maximum acceleration is 30 m/s², CONDUCT 10 sweep cycles respectively along the three vertical axis; AND the sweep rate is 1 oct/min.

8.6.1.2 Waterproof test

In accordance with the method specified in Chapter 14 of GB 4208-2008, CONDUCT the waterproof test of the battery pack. If the battery pack uses other protective enclosures outside, the battery pack and its protective enclosure shall be tested together.

8.6.2 Electrical insulation test

The connections, terminals, electrical contacts, etc. in the traction battery system shall be subjected to insulation treatment. They shall comply with the requirements of the chapter 6 in GB/T 18384.3-2001. The equipment shall follow the category II requirements. In accordance with the test voltage level as specified in Table 3, USE the megger (or other instrument with the same function and accuracy level) to measure the insulation resistance between the positive or negative pole and the metal enclosure.

8.6.3 Overcurrent protection test

The test is conducted in accordance with the test method in GB/T 31467.3-2015.

8.6.4 Overtemperature protection test

8.6.4.1 The traction battery system shall be charged in accordance with the requirements of 8.2.

8.6.4.2 The traction battery system discharges at 1 I3 (A), AND the simulated ambient temperature exceeds the set value during discharge.

9.1 Identification

The outer surface of the traction battery pack shall have a permanent nameplate. The nameplate shall include. product name, product model or specification, traction battery pack code, rated capacity (A · h), mass (kg), manufacturer mark, implementation standard number, production lot number, and production date.

9.2 Marking

9.2.1 The marking of the traction battery pack shall be placed on the first

9.2.4 The interface between the traction battery pack and the external power cable and control cable shall be clearly marked.

9.2.5 The marking of the prohibition, warning and instruction signs shall comply with the requirements of GB 2894-2008. […]

9.2.6

Battery box assembly requires identification of polarity. The polarity identification mark shall be located near the terminal post, AND it may use the following identifiers. […]