Low-temperature-resistant lead-acid battery lead paste for electric moped and preparation method thereof

Abstract

The invention relates to a low-temperature-resistant lead storage battery lead paste for electric bicycles and a preparation method thereof. 1.3-1.4g / cm3 sulfuric acid 80-86 parts, pure water 110-125 parts, colloidal graphite 3.0-4.0 parts, red lead 30-50 parts, stannous sulfate 1.0-1.5 parts, sodium sulfate 0.5-1.0 parts; short 0.7-0.9 parts of fiber; the ratio of parts by weight of each component in the negative electrode paste is: 1000 parts of lead powder, 75-81 parts of sulfuric acid with a concentration of 1.3-1.4g / cm3, 105-120 parts of pure water, and 0.6-0.8 parts of short fiber Parts, 6.0-7.0 parts of barium sulfate, 1.0-1.5 parts of Norway lignin, 4.0-5.0 parts of humic acid, 3.0-5.0 parts of acetylene black, 1.0-1.5 parts of semi-carbonized wood chips; improve the charge acceptance performance of the battery at low temperature and increase The discharge capacity is suitable for use in low temperature environments. Especially in the Northeast and Northwest of my country.

Description

technical field [0001] The invention relates to a storage battery material and a preparation method thereof, in particular to a low-temperature-resistant lead storage battery lead paste for electric bicycles and a preparation method thereof. Background technique [0002] At present, the low-temperature performance of lead-acid batteries for electric mopeds is not good, and generally can only meet or slightly exceed the national standard: the low-temperature capacity at -15°C reaches 0.7C 2 , and at present, domestic batteries with better low-temperature performance can reach: -20°C low-temperature capacity of 0.75C 2 ; but its charging and receiving performance is relatively poor, generally only slightly exceeding the national standard value: Ica / I 0 ≥2 (Ica is the receiving current for charging, I 0 For discharge current: 0.1C 2 ), generally can reach: 2.0 ~ 2.3. It cannot meet the requirements for the use of environments with low temperatures below -20°C, especially in...

AI Technical Summary

Problems solved by technology

[0002]At present, the low-temperature performance of lead-acid batteries used in electric mopeds is not good, and generally can only meet or slightly exceed the national standard: the low-temperature capacity at -15°C reaches 0.7C 2, and at present, domestic batteries with better low-temperature performance can reach: -20°C low-temperature capacity of 0.75C2; but their charging and receiving performance is relatively poor, generally only Slightly exceeds the national standard value: Ica / I0≥2 (Ica is the charging current, I0 is the discharge current: 0.1C2) , generally can reach: 2.0~2.3

It cannot meet the requirements of low temperature environment below -20°C, especially in the northeast and northwestern regions of our country, some of which can reach -30°C in winter

Therefore, in the cold northern regions of our country, there are common phenomena that the batteries of electric mopeds are undercharged (poor charging acceptance) and short travel distances (low discharge capacity).

[0003] At present, the commonly used methods to improve the low-temperature discharge performance of lead-acid batteries in China are: 1. Thinning the electrode and increasing the specific surface area of ​​the electrode, but the production control quality cost is high and the efficiency is low; 2. Adding sulfate with good conductivity to the electrolyte, The electrical conductivity of the battery electrode is improved, but it only increases the low-temperature capacity in the early stage and cannot be maintained continuously; 3. The concentration of the electrolyte is reduced, but the battery capacity is generally low; 4. The negative electrode is increased to increase the capacity of the negative electrode, but the cost is too high high

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