Lithium battery forklift lead sulfate could produce?
Lithium battery forklift lead sulfate could produce?
Forklift 24-48 v600ah lithium-ion battery pack
6 db600 we compare common electric forklift forklift lithium battery power, with the passage of time, the battery will shorten the time, life is also down, just like people, physical is inevitable, the law of nature and the product is same, have it the end of the period.
How to continue its use and improve the utilization rate of it, this is every forklift users want to know, the normal form lead sulfate crystallization forklift battery during discharge, relatively easy to restore to lead when charging, if the battery improper use and maintenance, often under charge or discharge, for example, will gradually form a thick hard on the cathode lead sulfate.
The lead sulfate charging is difficult to restore, in the conventional way for charging voltage is very high, due to the charging charging accept ability is very poor, a lot of product gas.
This kind of phenomenon usually occurs at the cathode, referred to as irreversible sulfate.
Lack of electrolyte;
Electrolyte containing impurities or battery internal short circuit, causing internal self-discharge, to form effective substances, long lead sulfate;
Often make lead acid lithium battery discharge excess or excessive deep discharge, small current
A lack of proper charging or charging is not enough, often on a regular basis more or less the imperfect part in the active material failed to restore the lead sulfate;
The electrolyte density too high or too high, too low temperature.
The electrolyte to generate heat, in the process of configuration must be cooled to 30 ℃ to 10 ℃ when lithium batteries, and the temperature too high or too low in the electrolyte of lithium battery performance influence;
Internal short circuit fault, failed to timely eliminate;
Prolonged half discharge discharge (
Such as xie electricity)
After discharge, without timely supplement electricity in 24 hours.
Above these factors forklift lithium battery capacity decline, even become the cause of the lithium battery life end.
Lithium battery forklift vulcanization of the most obvious characteristic is battery capacity decline, internal resistance increases.
Of course, if the battery fluid loss and soften positive plate also has the external characteristic.
Specific show the following states: charging bubbles appear earlier, electrolyte density rise more slowly.
Terminal voltage rise soon, and the voltage type 2.
Around 9 v, internal resistance increases, charging the electrolyte temperature than plate no sulfide lead acid lithium battery rising fast, in the discharge for lithium battery capacity test, using or terminal voltage drop rapidly.
The electrolyte density drop below normal.
1 - general discharge
Voltage drop 1 2 hours.
Around 8 v, plate color is not normal, positive plate a shallow brown (
, the cathode is a gray, positive and negative plate surface has a shiny crystal small particles;
With 20 hourly rate charging current to the electro-hydraulic proportion to 1.
After 120, with a 10 hour rate is 1/5 of the charging current to charge, until the positive and negative plates are uniform steaming, electrolyte density no longer rises.
Forklift mild sulfide batteries, lithium-ion batteries can be use some method to make it recover;
Failure, serious when the electrode charge it into electricity, in view of the serious sulfide charging method if not able to restore the capacity.
The battery will be scrapped in advance.
There are several ways remove sulfide?
Characteristic is what?
Essence is to make the white hard lead sulfate crystallization, soften the elaboration dissolved, enhance the capacity of plate internal reversible chemical reaction, the performance of the restore.
With 10 hours rate charging current to the electro-hydraulic proportion to 1.
After 120, with a 10 hour rate is 1/5 of the charging current to charge, until the positive and negative plates are uniform steaming, electrolyte density rise, no longer in current current continuous charging straight bubbling (20 hours rate
, stop charging half an hour, with a rate of 10 hours of charging current quarter continued to charge to the electrolyte cuhk bubbled to stop charging for 20 minutes, repeated several times, a few days and nights, until the electric back to normal, avoid excessive discharge, because of the depth of discharge, the greater the charge, the more frequent, the activity of the anode material PbO2 itself not firm structure, active substances charging volume expansion volume shrinkage when charging, discharge the deeper the volume expansion and contraction is more intense, so repeatedly, PbO2 structure between particles gradually relaxed, finally falls off form sulfide.
For charging are a large number of gas evolution, the activity of the anode material PbO2 is impacted by the gas, the impact would lead to active material loss, conducted once a year to check the discharge test as required, release the capacity of 30 -
40%, once every three years for capacity test released capacity of 80%;
Maintenance is particularly important, completes the dc power supply, I will summarize and constantly improve the level of their operation maintenance experience and, contribute to the development of lithium battery forklift.
Source: the lithium battery forklift truck;
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