Ultra-capacitor for electric vehicles
1 Scope
This standard specifies the requirements, test methods, inspection rules, marking, packaging, transportation and storage of ultracapacitors (electrochemical capacitor) for electric road vehicles.
This standard is applicable to ultracapacitor cell and module for electric road vehicles (hereinafter referred to as "ultracapacitor").
2 Normative reference
The following referenced document is indispensable for the application of this standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 2900.41-2008 Electrotechnical terminology — Primary and secondary cells and batteries
3 Terms and definitions
For the purposes of this standard, the terms and definitions given in GB/T 2900.41-2008 and the following apply.
3.1
ultracapacitors
electrochemical energy storage device in which at least one electrode uses an electrical double layer or pseudocapacitance to store energy, and the time-voltage curve during constant current charging or discharging is usually approximately linear
3.2
inorganic electrolyte ultracapacitors
ultracapacitors with aqueous solution as electrolyte
3.3
organic electrolyte ultracapacitors
ultracapacitors with organic solution as electrolyte
3.4
cell
basic unit of a ultracapacitor, including electrodes, diaphragms, electrolytes/liquids, terminals and enclosures
3.5
module
combined body composed of two or more ultracapacitor cells and their accessories
3.6
rated voltage
maximum working voltage of a ultracapacitor
3.7
capacitance
capacity of a ultracapacitor to store charge, in F
3.8
nominal capacitance
capacitance of a ultracapacitor provided by the enterprise, in F
3.9
energy
accumulated energy emitted from a ultracapacitor by constant discharge from its rated voltage to minimum working voltage, in W·h
3.10
nominal energy
energy of a ultracapacitor provided by the enterprise, in W·h
3.11
energy density
electric energy released from a ultracapacitor per unit mass under a certain discharge system, in W·h/kg
3.12
internal resistance
sum of the resistance of electrolyte/liquid, electrode, diaphragm, etc. and the internal connection resistance of a ultracapacitor, in Ω
3.13
nominal internal resistance
internal resistance value of a ultracapacitor provided by the enterprise, in Ω
3.14
voltage holding characteristics
ratio of the terminal voltage to the rated voltage of the ultracapacitor obtained after the capacitor is charged to the rated voltage at constant current, then charged at the rated voltage for 30 min, and finally left circuit opened for 72 h at room temperature
Foreword iv
1 Scope
2 Normative reference
3 Terms and definitions
4 Symbols
5 Requirements
6 Test method
7 Inspection rules
8 Marking, packaging, transportation and storage
