) the basic structure of colloidal lead-acid batteries
Colloid in liquid electrolyte lead-acid batteries are the common battery improvements, use gel electrolyte substitution sulfuric acid in safety, electrolyte, regenerative power, discharge performance and long service life etc relatively common battery improvements. Colloid lead-acid battery electrolyte, by a gelatinous liquid exist inside without free, in the same volume of electrolyte, large capacity under heat, heat dissipation great ability is strong, can avoid to produce thermal runaway general storage battery, Low concentration of electrolyte, plate corrode action weak. Even in the presence of concentration of electrolyte, statified phenomenon.
Colloid lead-acid battery performance than valve-control sealed battery, the battery has use gel stable performance, high reliability, long service life, the ability to adapt to the ambient temperature (high/low temperature), bear long discharge capacity, circulation discharge capacity, depth discharge and high discharge current capability is strong, have ever recharge and discharge protection, etc.
Currently used in electric bicycle homebred colloid lead-acid battery is by vacuum infusion hktria AGM clapboard, silicon and sulphuric acid solution irrigation to battery positive and negative between plates. Colloid battery in early can use oxygen, because the colloid put circular plate is surrounded by a positive, negative and positive plate above the oxygen can spread to produce negative plate, cannot achieve the plate with negative REDOX active material, can lead by vent discharge, and the rich liquid type battery.
Colloid lead-acid batteries used for a period of time after the start dryness and contraction, colloid, cracks oxygen through the cracks are directly to the negative oxygen circular plate. Vent will no longer often open, colloid lead-acid battery close to seal, dehydrate rarely. So for electric bicycle batteries main failure is the loss of lead-acid batteries, colloid mechanism is very good effect can be obtained. Colloid electrolyte in electrolyte is by adding gels will sulfuric acid electrolyte colloidal material solidified into, usually colloid in electrolyte with colloid stabilizer and capacity, some are also formula colloid coagulation and slow delay colloid filling agent, in order to gel.
(2) gel electrolyte advantages
Colloid electrolyte and ordinary liquid electrolyte compared with has the following advantages:
1, can prolong battery life. According to relevant literature, can prolong battery life is 2-3 times.
2, the colloid lead-acid battery performance improved the properities of sulfuric acid, with the same purity and water storage circumstance, can extend 2 times the storage time.
3 and colloid in the serious lack of lead-acid batteries, under the situation of electric resistance performance of sulfide is very obvious.
4 and colloid battery in serious discharge conditions restore ability.
5 and colloid lead-acid battery overcharge resistant capability, through the two lead-acid battery (a colloid lead-acid batteries, a valve-control sealed battery) also repeated several times, charging test battery capacity drops colloidal slowly, while valve-control sealed battery capacity, because water drop dramatically.
6 and colloid lead-acid battery later discharge performance improved.
7 and colloid lead-acid battery leakage, won’t appear, YiQi phenomenon such as acid is small, the damage to the environment is very small.
Although has many advantages over gel electrolyte, but also has some shortcomings, embodied in the following aspects:
1, colloid electrolyte relative to the ordinary electrolyte difficult for filling, it needs through changing the colloid retarder, charging formula to change.
2 if the preparation process of colloids in the production process is not reasonable or control, battery capacity will be smaller early.
3 and colloid lead-acid battery early exhaust brought out the granule is acid, which is easily in the shell, so the battery, the battery can reflect false leakage phenomenon acid.
4 and oxygen cycle though suppressed dehydrate, but also produce excellent heat cycle of oxygen, temperature is higher, even inside the battery form thermal runaway.
5, experience shows that the colloid lead-acid battery in plate production, colloid filling method, electrolyte formula, charging process and make a set of complete process, to ensure the battery performance of colloidal play better