1.What does SMF car battery mean?SMF car battery is short for sealed maintenance-free car battery. Usually maintenance-free battery means a wet battery. As the name implies, a wet cell battery employs a liquid electrolyte-containing medium to trigger a chemical reaction. For example, in a lead acid battery, a liquid electrolyte solution containing 65 percent water and 35 percent sulfuric acid sits in contact with metal plates of lead and lead oxide. When the battery is connected, the acid bonds to the plates in a reaction that also sends an electric current through the attached circuit. If a battery can be recharged through the passing through it of a reversed current, separating the acid from the plates, then it is said to be a secondary battery or rechargeable. Otherwise, if it is not rechargeable, it is a primary battery.
2.How to choose the good SMF car battery?
Many people buy SMF car battery, they only pay attention to the price or the outlook, they don’t know the structure of the battery, even if they know, they don’t know the technology being used in the battery. In this essay, we will tell you how to choose the good quality SMF car battery. We will make comparison of our brand VELA with other factories as the following parts:
the purity of the lead, the material of composite separator, the assembly methods of the sealed maintenance free battery, the assembly cluster, and the ingredient of the acid.
2.1 The comparison of purity of the lead
VELA battery uses 1# refined lead, 1# refined lead has higher purity, less harmful substances in the alloy, less battery self-discharge, tensile strength, ductility, hardness and grain strengthening effect are significantly better than 2# lead, It has a lower thermal expansion coefficient than 2# lead, so the grid is not easy to deform during the cycle of charging and discharging. The corrosion resistance of the grid is better than 2 #Lead is good, battery life is longer.While most manufacturers use 2# lead alloy, 2# lead alloy has more impurities than 1# lead alloy, battery self-discharge is larger, battery storage time is shorter, it is easy to cause plate vulcanization and battery life end.
2.2 The comparison of the material of composite separator
VELA maintenance-free battery uses PE double-sided rib diaphragm. The PE double-sided rib diaphragm uses a unique double-sided rib design, which increases the mechanical strength and stiffness of the PE diaphragm, reduces the deformation of the diaphragm caused during the battery assembly process, and avoids the direct pressing and bonding of the electrode plate to the diaphragm base, To ensure the rapid diffusion of acid when starting at low temperature and normal temperature and high current, the battery power is stronger when in use, and the PE double-sided ribs can effectively remove or reduce the thermal oxidation problem of the PE diaphragm and the problem of lead dendrite penetration.
While most manufacturers use single-gluten PE separators. PE single-gluten has poor mechanical strength, is not abrasion-resistant, easy to oxidize, and has unstable quality. The battery is prone to lead dendritic penetration to short-circuit later.
2.3 The comparison of the assembly methods
VELA car battery has strengthened assembly on the side partition. The tight assembly of the edged separator ensures that the active material of the electrode plate and the separator are in close contact, and the active material of charge and discharge is not easy to fall off during the use process. Vibration resistant and long service life. Tight assembly has shorter channels for acid diffusion during discharge and better low-temperature start up.
While most manufacturers did not strengthen the assembly. In their assembly method, the active material of the electrode plate easily falls off when the battery is charged and discharged, causing a short circuit at the lower part of the electrode plate, greatly shortening the battery life, the electrode plate is easily deformed, the electrode plate is bent or broken during vibration, and finally the battery is scrapped.
2.4The comparison of assembly cluster
The assembly cluster of VELA battery goes through several processes such as PE automatic wrapping machine and casting and welding machine finishing. It is not easy to cause the battery to short-circuit due to the warping of the plate, and the life is longer.The battery of other manufacturers is prone to uneven electrode plates, warped electrode plates, causing short circuits, uneven force on the electrode plates when vibrating, poor anti-vibration performance, and easy short circuit during use, resulting in battery life end.
2.5The comparison of ingredient of the acid
The (superior grade) acid used by VELA has low impurity content, low self-discharge, and long battery life. While most manufacturers have a high content of impurities, especially the iron sulfate in the battery will react with the lead in the negative plate to form ferrous sulfate, and the ferrous sulfate produced by the negative reaction will react with the lead dioxide of the positive electrode to form sulfuric acid Iron, It is cycled until the plate completely loses active material, the battery life ends.
Item
Data
Superior pure
H2SO4 (%≥)
95.0-98.0
Burning residue（%≤)
0.0005
CL(%≤)
0.00002
NO3 (%≤)
0.00002
NH3(%≤)
0.0001
Fe (%≤)
0.00002
Cu(%≤)
0.00001
As(%≤)
0.000001
Pb(%≤)
0.00001
Potassium permanganate reducing substance(%≤)
0.0002
Item
Data
Analytical pure
H2SO4 (%≥)
95.0-98.0
Burning residue（%≤)
0.001
CL(%≤)
0.00003
NO3 (%≤)
0.00005
NH3(%≤)
0.0002
Fe (%≤)
0.00005
Cu(%≤)
0.00001
As(%≤)
0.000003
Pb(%≤)
0.00001
Potassium permanganate reducing substance(%≤)
0.0005
3.Summary.
Vela SMF car battery has advantages of the purity of the lead, the material of composite separator, the assembly methods of the wet battery, the assembly cluster, and ingredient of the acid. Always make sure you’re choosing the good battery for your purposes and vehicle. When you need help how to judge the battery has good composition or not, please contact us for unsure.
2.2 The comparison of the material of composite separator
VELA maintenance-free battery uses PE double-sided rib diaphragm. The PE double-sided rib diaphragm uses a unique double-sided rib design, which increases the mechanical strength and stiffness of the PE diaphragm, reduces the deformation of the diaphragm caused during the battery assembly process, and avoids the direct pressing and bonding of the electrode plate to the diaphragm base, To ensure the rapid diffusion of acid when starting at low temperature and normal temperature and high current, the battery power is stronger when in use, and the PE double-sided ribs can effectively remove or reduce the thermal oxidation problem of the PE diaphragm and the problem of lead dendrite penetration.
While most manufacturers use single-gluten PE separators. PE single-gluten has poor mechanical strength, is not abrasion-resistant, easy to oxidize, and has unstable quality. The battery is prone to lead dendritic penetration to short-circuit later.
2.3 The comparison of the assembly methods
VELA car battery has strengthened assembly on the side partition. The tight assembly of the edged separator ensures that the active material of the electrode plate and the separator are in close contact, and the active material of charge and discharge is not easy to fall off during the use process. Vibration resistant and long service life. Tight assembly has shorter channels for acid diffusion during discharge and better low-temperature start up.
While most manufacturers did not strengthen the assembly. In their assembly method, the active material of the electrode plate easily falls off when the battery is charged and discharged, causing a short circuit at the lower part of the electrode plate, greatly shortening the battery life, the electrode plate is easily deformed, the electrode plate is bent or broken during vibration, and finally the battery is scrapped.
2.2 The comparison of the material of composite separator
VELA maintenance-free battery uses PE double-sided rib diaphragm. The PE double-sided rib diaphragm uses a unique double-sided rib design, which increases the mechanical strength and stiffness of the PE diaphragm, reduces the deformation of the diaphragm caused during the battery assembly process, and avoids the direct pressing and bonding of the electrode plate to the diaphragm base, To ensure the rapid diffusion of acid when starting at low temperature and normal temperature and high current, the battery power is stronger when in use, and the PE double-sided ribs can effectively remove or reduce the thermal oxidation problem of the PE diaphragm and the problem of lead dendrite penetration.
While most manufacturers use single-gluten PE separators. PE single-gluten has poor mechanical strength, is not abrasion-resistant, easy to oxidize, and has unstable quality. The battery is prone to lead dendritic penetration to short-circuit later.
2.3 The comparison of the assembly methods
VELA car battery has strengthened assembly on the side partition. The tight assembly of the edged separator ensures that the active material of the electrode plate and the separator are in close contact, and the active material of charge and discharge is not easy to fall off during the use process. Vibration resistant and long service life. Tight assembly has shorter channels for acid diffusion during discharge and better low-temperature start up.
While most manufacturers did not strengthen the assembly. In their assembly method, the active material of the electrode plate easily falls off when the battery is charged and discharged, causing a short circuit at the lower part of the electrode plate, greatly shortening the battery life, the electrode plate is easily deformed, the electrode plate is bent or broken during vibration, and finally the battery is scrapped.
2.4The comparison of assembly cluster
The assembly cluster of VELA battery goes through several processes such as PE automatic wrapping machine and casting and welding machine finishing. It is not easy to cause the battery to short-circuit due to the warping of the plate, and the life is longer.The battery of other manufacturers is prone to uneven electrode plates, warped electrode plates, causing short circuits, uneven force on the electrode plates when vibrating, poor anti-vibration performance, and easy short circuit during use, resulting in battery life end.
2.5The comparison of ingredient of the acid
The (superior grade) acid used by VELA has low impurity content, low self-discharge, and long battery life. While most manufacturers have a high content of impurities, especially the iron sulfate in the battery will react with the lead in the negative plate to form ferrous sulfate, and the ferrous sulfate produced by the negative reaction will react with the lead dioxide of the positive electrode to form sulfuric acid Iron, It is cycled until the plate completely loses active material, the battery life ends.
