2024年5月26日发(作者：闳如之)
电动车蓄电池（EV battery）
When charging, lead sulfate forms lead oxide, and when
discharged, lead oxide is reduced to lead sulfate. While the
lead sulfate is a very easy crystallization, when lead sulfate
concentration of electrolytic solution in the battery is too
high or the static idle time is too long, will "hold" group,
a small crystal, these small crystals of lead sulfate to attract
around, like a snowball formation of crystalline inert large,
lead sulfate crystallization after charging not only can not
be reduced to be attached to the precipitation of lead oxide,
electrode plate, electrode plate caused a decline in the work
area, this phenomenon is called vulcanization, it is often said
that the aging. At this point the battery will gradually
decrease until it is unusable. When a large amount of lead
sulfate is piled up, the lead particles are attracted to form
a lead branch, and the lead bridging between the positive and
negative plates causes a short circuit of the battery. If the
plate surface or seal molded case has a gap, lead sulfate
crystallization will accumulate in the crevice, and expansion
of tension, the plate broken off or rupture, causing
irreparable physical damage to the battery. Therefore, the main
mechanism leading to the failure and damage of lead-acid
batteries is the unavoidable vulcanization of the battery
itself.
2, the reasons for the special working environment of electric
bicycles
As long as the lead-acid batteries, in the use of the process
will be vulcanized, but the lead-acid battery lead-acid
batteries in other fields than the electric bicycle use has a
longer life, this is because the lead-acid battery electric
bicycle has an easier curing work environment.
Deep discharge
The lead-acid batteries used in automobiles are only
unidirectional discharge at the time of ignition, and the power
generation opportunity is automatically charged to the battery
without causing a deep discharge of the battery. The electric
bicycle can not be charged when riding, often more than 60% of
the depth of discharge, deep discharge when the concentration
of lead sulfate increases, sulfide will be quite serious.
Large current discharge
Electric car 20 kilometers cruising current is generally 4A,
this value has been higher than other areas of battery work
current, and speeding overload electric vehicle work current
is greater. Battery manufacturers have carried out cycle life
tests on 1C charging 70% and 2C discharge 60%. After this kind
of life test, the battery can reach 350 times of charge,
discharge and cycle life, but the actual effect is very
different. This is because the high current work increases the
discharge depth by 50%, and the battery accelerates the
vulcanization. Therefore, the battery life of the electric
tricycle is shorter, because the body of the three wheeled
motorcycle is too heavy, and the working current is above 6A.
Charging and discharging frequency is high
In the field of battery backup power supply, only when blackout
2024年5月26日发(作者：闳如之)
电动车蓄电池（EV battery）
When charging, lead sulfate forms lead oxide, and when
discharged, lead oxide is reduced to lead sulfate. While the
lead sulfate is a very easy crystallization, when lead sulfate
concentration of electrolytic solution in the battery is too
high or the static idle time is too long, will "hold" group,
a small crystal, these small crystals of lead sulfate to attract
around, like a snowball formation of crystalline inert large,
lead sulfate crystallization after charging not only can not
be reduced to be attached to the precipitation of lead oxide,
electrode plate, electrode plate caused a decline in the work
area, this phenomenon is called vulcanization, it is often said
that the aging. At this point the battery will gradually
decrease until it is unusable. When a large amount of lead
sulfate is piled up, the lead particles are attracted to form
a lead branch, and the lead bridging between the positive and
negative plates causes a short circuit of the battery. If the
plate surface or seal molded case has a gap, lead sulfate
crystallization will accumulate in the crevice, and expansion
of tension, the plate broken off or rupture, causing
irreparable physical damage to the battery. Therefore, the main
mechanism leading to the failure and damage of lead-acid
batteries is the unavoidable vulcanization of the battery
itself.
2, the reasons for the special working environment of electric
bicycles
As long as the lead-acid batteries, in the use of the process
will be vulcanized, but the lead-acid battery lead-acid
batteries in other fields than the electric bicycle use has a
longer life, this is because the lead-acid battery electric
bicycle has an easier curing work environment.
Deep discharge
The lead-acid batteries used in automobiles are only
unidirectional discharge at the time of ignition, and the power
generation opportunity is automatically charged to the battery
without causing a deep discharge of the battery. The electric
bicycle can not be charged when riding, often more than 60% of
the depth of discharge, deep discharge when the concentration
of lead sulfate increases, sulfide will be quite serious.
Large current discharge
Electric car 20 kilometers cruising current is generally 4A,
this value has been higher than other areas of battery work
current, and speeding overload electric vehicle work current
is greater. Battery manufacturers have carried out cycle life
tests on 1C charging 70% and 2C discharge 60%. After this kind
of life test, the battery can reach 350 times of charge,
discharge and cycle life, but the actual effect is very
different. This is because the high current work increases the
discharge depth by 50%, and the battery accelerates the
vulcanization. Therefore, the battery life of the electric
tricycle is shorter, because the body of the three wheeled
motorcycle is too heavy, and the working current is above 6A.
Charging and discharging frequency is high
In the field of battery backup power supply, only when blackout