In theory, lithium batteries charge faster than lead-acid batteries due to the high activity of lithium. But it is not recommended to use fast charging. Fast charging will not have enough power as slow charging. And fast charging damages the battery.
The allowed charging current of lithium batteries can be a little higher than that of lead-acid batteries (for example, the maximum allowed is 1C), usually 0.2-0.4C is chosen (lithium batteries for electric vehicles generally choose 0.2c).
Detailed information:
If charging continues, since the storage compartment of the negative electrode has been filled with lithium atoms, subsequent lithium metal will accumulate on the surface of the negative electrode material. These lithium atoms will grow dendrites from the surface of the negative electrode towards the lithium ions.
These metallic lithium crystals will pass through the separator and short-circuit the positive and negative electrodes. Sometimes the battery explodes before a short circuit occurs. This is because during the overcharging process, the electrolyte and other materials decompose to produce gas, causing the battery shell or pressure valve to swell and rupture, peallowing oxygen to enter and react with the lithium. The atoms accumulated on the surface of the negative electrode thus explode.
1. Different properties
1. Lead-acid battery: An electrode consists primarily of lead and its oxides, and the electrolyte is sulfuric acid. battery.
2. Lithium battery: A type of battery that uses lithium metal or lithium alloy as the negative electrode material and uses a non-aqueous electrolyte solution.
2. Different characteristics
1. Characteristics of lead-acid batteries:
(1) Safety seal
During normal operation, the electrolyte No leakage from the battery terminals or case. No free acid Special wick separators keep the acid inside and there is no free acid inside the battery, so the battery can be placed anywhere.
(2) Ventilation system
Once theIf the internal pressure of the battery exceeds the normal level, the lead-acid battery releases excess gas and automatically closes to ensure that there is no excess gas in the battery.
(3) Simple maintenance
Since the gas composite system converts the generated gas into water, there is no need to add water when cleaning. use of VRLA batteries.
(4) Long lifespan
VRLA batteries using corrosion-resistant lead-calcium alloy fences can float for 10-15 years.
2. Lithium battery characteristics:
(1) The energy is relatively high. It has a high storage energy density, reaching 460-600 Wh/kg, about 6-7 times that of lead-acid batteries.
(2) Long life, the lifespan can reach For more than 6 years, lithium iron phosphate has been used as a positive electrode battery for charging and discharging 1C (100% DOD), with 10,000records available;
(3) High rated voltage (single operating voltage is 3.7 V or 3.2 V), equivalent to the series voltage of three nickel-cadmium or nickel-hydride rechargeable batteries metal, which can easily form a battery power supply. Lithium batteries can adjust the voltage to 3.0V with the new lithium battery voltage regulator technology to adapt to the use of small household appliances.
(4) With high power endurance, the lithium iron phosphate battery for electric vehicles can reach 15-30 degrees Celsius charging and discharging capacity, which is convenient for starting and high intensity accelerations.
(5) The self-discharge rate is very low, which is one of the most notable advantages of the battery. This can be less than 1%/month, less than 1/20 of NiMH batteries.
Detailed information:
Maintenance of lithium batteries and lead-acid batteries:
The charging process for new batteries generally takes 6 to 8 hours. The charger will turn green after charging. If the charging time is too long, you should check whether the voltage protection device of the charger is damaged. If damaged, the charger should be replaced in time. Otherwise, it's easy to recharge the battery. In addition, the charger does not buy a fast charger, and fast charging is also harmful to the battery board.
If the battery is not cleaned in time, it will easily affect the service life and electrical performance of the battery. Simply put, a battery is an electrochemical device that converts chemical energy into electrical energy. For the battery to function properly, it must be kept clean.
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