Lead-acid battery works

Lead-acid battery charging and discharging of the electrochemical reaction process is the process of charging, lead sulfate to form lead oxide, lead oxide and reduction of discharge of lead sulfate. The lead sulfate crystals is a very easy matter, when the battery electrolytic solution of sulfuric acid in the concentration of lead in the static idle time is too high or too long, they will "hold a" group, to form small crystals, and attract around these small crystals lead sulfate, as the inertia of the formation of large snowball as the crystallization of lead sulfate crystals after the charge not only can not be reduced to lead oxide, but also precipitated the board attached to the electrode, resulting in a decline in working area of electrodes, this phenomenon is called sulfide, which is often said that the aging. At this time the battery capacity will gradually decrease until unusable.

Special working environment of electric bicycles

As long as lead acid batteries such as PCGA-BP1N, PCGA-BP2NX, PCGA-BP2NY, PCGA-BP2R, PCGA-BP2S, PCGA-BP2T, PCGA-BP2V, PCGA-BP4V, PCGA-BP71, VGP-BPL2, VGP-BPS2, VGP-BPS3, VGP-BPS5, VGP-BPS8, VGP-BPS9, PCG-R505, PCG-V505 and PCG-Z505 are used in the curing process, but other than the field of lead-acid battery electric bicycle with lead-acid batteries used on a longer life, it is because lead-acid battery electric bicycle has an easy cure work environment.

① depth of discharge

Used lead-acid batteries in the car when the one-way only in the discharge ignition, ignition battery automatically charged after the generator will not cause the battery depth of discharge. The electric bicycle can not be charged when riding, often more than 60% of the depth of discharge, deep discharge, lead sulfate concentration, sulfide would be very serious.

② large current discharge

Current electric vehicles is generally 20 km cruise 4A, this value is higher than other areas of the battery current, while speeding the work overload of the current electric cars is even greater. Battery manufacturers have been 1C charge 70%, 2C 60% of the discharge cycle life test. After such a life test can be achieved 350 charge and discharge cycle life of the battery a lot, but the actual effect will be far in the use of the. This is because the large current increase of 50% of the work of depth of discharge, the Battery will accelerate curing. Therefore, the electric three-wheeled motorcycle shorter battery life because the body is too heavy three-wheeled motorcycle, working current up to 6A above.

③ high frequency discharge

Used in the field of battery backup power supply, and only during power outages will discharge, if the stop 8 times a year electricity to reach 10 years of life, only done 80 cycles charge life, and electric vehicle charge and discharge cycles a year 300 times or more are common.

④ Short Charge

Since electric bicycles are vehicles, not much time to charge, to be completed within 8 hours of 36 volt or 48 volt rechargeable 20 Ah, this must raise the charging voltage (typically 2.7 to 2.9 V single-Festival), when the charge single-cell voltage exceeds the voltage of oxygen evolution (2.35 V) or hydrogen-voltage (2.42 V), the battery will be open due to excessive oxygen evolution and the exhaust valve, causing water loss, so that the electrolyte concentration increased, the phenomenon of increasing sulfide battery .

⑤ charge after discharge can not be timely

As a transport, charging and discharging of electric bicycles are completely separated from the difficult conditions in a timely manner after discharge charge, and discharge of lead sulfate formed after a large number of hours without charge if more than half reduced to lead oxide, sulfide will form crystals .