1 ScopeThis standard specifies the allowable measurement range and test method of cadmium elements in lead-acid batteries (hereinafter referred to as battery).
This standard is suitable for batteries with lead-based materials, such as start-up lead-acid batteries, lead-acid storage batteries for internal combustion control vehicles, lead-acid storage batteries for rail passenger cars, fixed-type anti-acid lead-acid battery, fixed type Valve-controlled sealed lead-acid battery, small valve controlled sealed lead-acid battery, ship started lead-acid battery, lead-acid battery for motorcycles, lead-acid battery, lead-acid battery, electric storage, energy storage, electricity Heliflow measurement range and test method for cadmium elements in a lead-acid storage battery.
2 normative reference file
The terms in the following documents have become the terms of this standard through the references of this standard. Any reference file that comes from NOTE is subsequently all modifications (not including errata) or revisions do not apply to this standard, however, encourages parties to reach an agreement on this standard to study the latest version of these files . Any reference file without Note is available for this standard.
GB / T 2900.11 battery noun
GB / T 5008 starts with lead-acid batteries
Determination of mercury, cadmium and lead content in battery
3 technical requirements
The average content of cadmium element in the lead-acid battery should not exceed 0.002% of the total mass.
4 measurement method
4.1 inspection conditions
4.1.1 Environmental Conditions
In addition to other specified, the inspection should be conducted in the following environment:
Temperature: 15 ¡ã C ~ 35 ¡ã C;
Relative humidity: 45% ~ 85%;
Atmospheric pressure: 86kpa ~ 106kpa.
4.1.2 Safety Conditions
Appropriate protective measures should be taken to prevent personal injury.
It should be tested and analyzed by qualified, experienced technicians.
4.2 Sampling method
4.2.1 Anatomy of lead-acid battery
After weighing the mass M0 (¡À 1G) of the battery, turn on the battery cover, take out the rubber valve plugged on the exhaust hole of the lead-acid battery, discharge the gas in the inside of the battery, and then use the steel saw to put the lead-acid battery shell Remove the pole group in a battery cell.
4.2.2 Positive Path Plate
Remove the positive electrode plate in the battery pole, remove the positive lead paste, remove the positive plate gate, rinse with deionized water 2 times, re-clean it with alcohol, dry after drying, weigh the weight of a single linen M1 (¡À 0.1g), cut the positive plate gate into a small segment of 1 mm or less with a scissors, mix uniform.
4.3 Detection of Cadmium Content in Plate
From the mixed uniform positive plate grid particles weighing about 500 mg, according to the GB / T 20155-2006 standard 2. 2 performed, the mass content of cadmium in the positive plate is tested with flame atomic absorption spectrometry.
4.4 Data Processing
Quality content of CD in N - lead-acid battery: g / g
The conversion constant of the overall cadmium content of the battery and the positive plate gases, generally 1.06
N - a single battery number of batteries
Quality content of CD element in C - positive plate gate, mg / kg
M0 - Quality, g of a lead-acid battery
M1 - Quality of the square grid in a single single
5 quality assessment
5.1 Sampling Plan
Random sampling in a certain specification, 3 samples.
5.2 judgment method
The CD element content in the sampled sample was tested according to the method described in Chapter 4, and the arithmetic average was calculated. If you meet the requirements of Chapter 3, it is determined that the qualified, in turn, it is determined that it is unqualified.
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