Lithium battery is a type of battery that uses lithium metal or lithium alloy as the negative electrode material and uses non-aqueous electrolyte solution; lead-acid battery is a kind of battery, whose function is to store limited electric energy and use it in a suitable place; colloid Batteries are batteries in which the electro-hydraulic is in a gel state, and belong to a development category of lead-acid batteries. This article introduces the difference between lithium batteries and gel batteries and which is better between gel batteries and lead-acid batteries?
The difference between lithium battery and gel battery
①Environmental protection: The lithium battery of the solar street lamp is pollution-free; the gel battery is polluted by heavy metal lead.
②The electrolyte is different: the electrolyte of the lithium battery is a non-aqueous liquid organic electrolyte; the electrolyte of the gel battery is a gel electrolyte.
③Long service life: The current general lithium iron phosphate charge is 1500 times, no memory effect, about 85% of the storage capacity after 1500 times of charge; while the gel battery is about 500 times, the memory effect is obvious.
④Safety: The difference in the safety of power lithium battery materials is that the gel battery technology is quite mature, and the safety is higher than that of lithium batteries.
⑤High efficiency and good performance: The small self-discharge of the colloidal battery is good for long-term storage; the high deep discharge performance is good for improving the utilization rate and discharge capacity of active materials; the recovery ability of deep discharge and overdischarge is strong, and the charge acceptance ability exceeds the national standard by more than 50% .
⑥The working principle is different: when the lithium battery is charged, the lithium ions generated on the positive electrode move to the negative electrode through the electrolyte. The more lithium ions that reach the negative electrode, the higher the charging capacity; when the battery is discharged, the lithium ions embedded in the negative electrode It moves back to the positive electrode, and the more lithium ions return to the positive electrode, the higher the discharge capacity. Gel batteries are sealed using the principle of cathode absorption. The reduction of oxygen on the negative electrode and the increase in the hydrogen overpotential of the negative electrode itself avoid a large number of hydrogen evolution reactions.
Which is better, gel battery or lead-acid battery?
Lead-acid batteries include colloidal and liquid batteries. These two types of batteries are used according to regions. The colloidal battery has strong cold resistance. Its working energy efficiency is much better than that of liquid batteries under minus 15°C, and its heat preservation The performance is very good, if the temperature of the place where you live is very low in winter, you can choose the gel battery.
Gel batteries belong to a development category of lead-acid batteries. The simplest method is to add a gelling agent to sulfuric acid to make the sulfuric acid electro-liquid become colloidal. Batteries with colloidal electro-hydraulic are usually called gel batteries. The difference between gel batteries and conventional lead-acid batteries is not only that the electro-hydraulic is changed to gel. Recently, laboratories have added a targeted coupling agent to the plate formula to greatly improve the reaction utilization of the plate active material. According to non-public data, it can reach a weight ratio energy level of 70wh/kg.
The performance of the gel battery is better than the valve-regulated sealed lead-acid battery. The gel battery has stable performance, high reliability, long service life, strong adaptability to ambient temperature (high and low temperature), long-term discharge ability, and cyclic discharge ability , Deep discharge and high current discharge ability is strong, has the advantages of overcharge and overdischarge self-protection.
The gel battery has a deep discharge protection mechanism inside, and the battery after deep discharge can still be connected to the load. Charging within four weeks will not damage the performance of the battery. The nominal capacity of the battery will be restored soon after being charged, and the battery life will not be affected. Deep discharge of lead-acid battery will cause permanent damage to the battery. Once discharged, if it cannot be recharged in a short time, the battery will be immediately scrapped. That is, part of the capacity of the battery can be restored after the full length is charged, and the life and reliability of the battery will be greatly reduced.
The above is the difference between lithium batteries and gel batteries and which is better between gel batteries and lead-acid batteries. The emergence of lithium battery products is the realization of progress in the electric vehicle industry. Although lithium batteries have many advantages, at present, electric vehicles are still dominated by lead-acid batteries. The main factor is imperfect technology. In order to replace lead-acid batteries, lithium batteries must achieve a matching height and at the same time improve the cost performance, so that they can be accepted by more people.