Standard No.:	NB/T 42007-2013
English Name:	Bipolar Plate for Vanadium Flow Battery-test Method
Chinese Name:	全钒液流电池用双极板 测试方法
Professional Classification:	NB    Professional Standard - Energy
Issued by:	National Energy Administration
Issued on:	2013-6-8
Implemented on:	2013-10-1
Status:	valid
Language:	English
File Format:	PDF
Word Count:	5000 words
Price(USD):	150.0
Delivery:	via email in 1 business day

Bipolar plate for vanadium flow battery - Test method 1 Scope This standard specifies the general requirements and test methods of bipolar plate for vanadium flow battery, mainly including thickness uniformity test, warpage test, corrosion current density test, resistivity test, gas permeability test, bending strength test, tensile strength test and compressive strength test. This standard is applicable to all bipolar plate materials for vanadium flow battery. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 13465.2-2002 Test method for flexure strength of impermeable graphite materials 3 Terms and definitions For the purpose of this standard, the following terms and definitions apply. 3.1 vanadium flow battery; VFB energy storage device that realizes the mutual conversion of electric energy and chemical energy through the electrochemical reaction of vanadium ions at different valence states in positive and negative electrolytes, also known as vanadium flow battery system Note: The vanadium flow battery is mainly composed of power unit (electric pile or module), energy storage unit (electrolyte and storage tank), electrolyte delivery unit (pipeline, valve, pump, heat exchanger, etc.) and battery management system, etc. 3.2 bipolar plate conductive separator used for collecting conduction current and separating positive and negative electrolytes 3.3 corrosion current density current value generated by the damage caused by electrochemical action of bipolar plate of battery per unit area on corrosion potential under specified conditions, in μA/cm2 Note: The magnitude of corrosion current density, as a physical quantity characterizing the corrosion resistance of bipolar plate materials on corrosion potential, reflects the corrosion rate of bipolar plates. 3.4 volume resistivity resistivity per unit sectional area per unit length of bipolar plate, in Ω·cm 3.5 interface contact resistance resistance generated by the contact part between two materials, in Ω·cm2 Note: It is characterized by the contact resistance between bipolar plate material and electrode material (usually carbon felt). 3.6 gas permeability amount of gas passing through the sample per unit area per unit time under the test conditions, in cm3/(cm2·s) 3.7 bending strength maximum bending stress that the material can bear during bending under specified conditions, in MPa 3.8 tensile strength maximum tensile stress that the material can bear before fracture during tension under specified conditions, in MPa

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 General requirements 5 Test method Bibliography