NB/T 11203-2023 English PDF (NBT11203-2023)

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NB/T 11203-2023: Technical specification of carbon plastic bipolar plate for vanadium flow battery
NB/T 11203-2023
NB
ENERGY INDUSTRY STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 29.220.20
CCS K 84
Technical Specification of Carbon Plastic Bipolar Plate for
Vanadium Flow Battery
ISSUED ON: MAY 26, 2023
IMPLEMENTED ON: NOVEMBER 26, 2023
Issued by: National Energy Administration
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Terms and Definitions ... 4
4 General Requirements ... 5
4.1 Test conditions and requirements ... 5
4.2 Structural dimensions ... 5
4.3 Electrical properties ... 5
4.4 Mechanical properties ... 5
4.5 Durability ... 6
5 Test Methods ... 6
5.1 Test instruments and precision ... 6
5.2 Test method ... 7
6 Packaging and Marking ... 8
6.1 Packaging ... 8
6.2 Marking ... 8
Foreword
This Document was drafted as per the rules specified in GB/T 1.1-2020 Directives for
Standardization – Part 1: Rules for the Structure and Drafting of Standardizing Documents.
Please note some contents of this Document may involve patents. The issuing agency of this
Document shall not assume the responsibility to identify these patents.
This Document was proposed by China Electrical Equipment Industry Association.
This Document shall be under the jurisdiction of National Technical Committee on Flow
Battery in Energy Industry of Standardization Administration of China (NEA/TC 23).
Drafting organizations of this Document: Hunan Yinfeng New Energy Co., Ltd; National
Institute of Clean-and-Low-Carbon Energy, Hunan Agricultural University; Beijing Institute of
Electrical Engineering and Economics, Mechanical Industry; Leshan V-Liquid Energy Co., Ltd.;
Sichuan Xingming Energy Environmental Protection Technology Co., Ltd.; Shaanxi Huayin
Technology Co., Ltd.; Institute of Metal Research, Chinese Academy of Sciences; Anhui Leoch
Power Supply Co., Ltd.; China Quality Certification Center; Weihai Nanhai Carbon Materials
Co., Ltd.; and Chengde Xinxin Vanadium Titanium Energy Storage Technology Co., Ltd.
Chief drafting staffs of this Document: Wu Xuewen, Liu Qinghua, Wu Xiongwei, Fan
Yongsheng, Zhang Liang, Chen Jijun, Zhang Zhongyu, Liu Xinyun, Pu Nianwen, Liu Jianguo,
Dong Jie, Wang Gang, Han Jianyang, and Liu Zongyu.
Technical Specification of Carbon Plastic Bipolar Plate for
Vanadium Flow Battery
1 Scope
This Document specifies the general conditions, test methods, marking and packaging of
carbon-plastic composite bipolar plate for vanadium flow battery.
2 Normative References
The provisions in following documents become the essential provisions of this Document
through reference in this Document. For the dated documents, only the versions with the dates
indicated are applicable to this Document; for the undated documents, only the latest version
(including all the amendments) is applicable to this Document.
GB/T 191-2008 Packaging - Pictorial Marking for Handling of Goods
GB/T 8719-2022 General rule for packing, marking, storage, transport and quality
certificates of carbonaceous material and products
GB/T 29840-2013 Vanadium flow battery - Terminology
JB/T 7758.2-2005 Specifications of flexible graphite sheets
NB/T 42007-2013 Bipolar Plate for Vanadium Flow Battery - Test Method
NB/T 42080-2016 Ion conductive membrane for Vanadium flow battery - Test method
NB/T 42082-2016 Vanadium flow battery - Test method for electrode
3 Terms and Definitions
For the purposes of this Document, the terms and definitions given in GB/T 29840-2013 and
the following apply.
3.1 Carbon-plastic composite bipolar plate
A bipolar plate for a vanadium flow battery made of carbon and plastic (polymer or polymer
derivative).
4 General Requirements
4.1 Test conditions and requirements
--- Temperature: 25℃±5℃;
--- Pressure: 86 kPa～106 kPa;
--- Air humidity: 10%～96%.
4.2 Structural dimensions
4.2.1 Thickness uniformity requirements
The thickness dimensional deviation shall comply with the following provisions: when the
average thickness d≤0.4 mm, the difference between the maximum and minimum thickness
values ≤6%d; when 0.4< d≤1.0 mm, the difference between the maximum and minimum
thickness values ≤5%d; when d >1.0 mm, the difference between the maximum and minimum
thickness values ≤4%d. See 5.2 a) for the test method.
4.2.2 Dimensional deviation
Dimensional deviation in length and width shall be ≤ ±1 mm. Measure the length and width of
the material with a steel ruler. The specific dimensional requirements of products of different
specifications shall be negotiated by the supplier and the purchaser.
4.3 Electrical properties
Volume resistivity shall be ≤0.15 Ω·cm, and the surface resistance in the direction perpendicular
to the bipolar plate panel shall be ≤0.1 Ω·cm2; the pressure range is 0.5 MPa~0.6 MPa, and the
contact resistance with the carbon felt surface shall be ≤0.1 Ω·cm2. See 5.2 b) for the test
method.
4.4 Mechanical properties
4.4.1 Bending strength requirements
Bending strength shall be ≥20 MPa. See 5.2 c) for the test method.
4.4.2 Tensile strength requirements
Tensile strength shall be ≥10 MPa. See 5.2 d) for the test method.
4.4.3 Compressive strength requirements
Compressive strength shall be ≥20 MPa. See 5.2 e) for the test method.