Sunday, January 16, 2011
Weak current College】 【lead-acid battery parts and technical requirements】.
<br> <br> 1 plate <br> <br> Plate is part of the main lead-acid battery is determined by the grid and active substances (activation of lead paste) constitute, according to its structure in the form of plates is .pasted-plate and tube plates, according to its status can be divided into ordinary plates and dry-charged plate, according to their effectiveness can be divided into positive plate and negative plates. Plates in the battery's main role is to: <br> < .br> 1. electrochemical reaction of maternal <br> <br> 2. formation of electrode voltage <br> <br> 3. complete the conversion of <br> <br> Plates of the technical requirements described in the lead-acid battery .manufacturing and process control in Chapter VIII. <br> <br> II. divisions <br> <br> Separator is an important part of the lead-acid battery, also known as the "third pole", it's good and bad quality directly .affects the function and lead-acid battery, the divisions by porous rubber or plastic or glass fiber material, its General to flake or bag-like forms exist in the battery, its main role is to: <br> <br> 1. prevent .the positive and negative plates contact short circuit and ensure the positive and negative plates for shortest distance. <br> <br> 2. ensure the electrolytes cationic and anionic electrode reaction smoothly through participation. <br> <br> 3. the carrier of .the electrolyte. <br> <br> 4, the resistance of corrosion and negative plates lead paste material particles and plate subject to earthquake damage. <br> <br> 5, block, some on the pole of harmful substances through the diaphragm for .migration and proliferation. <br> <br> Lead-acid battery separators should have the following characteristics: <br> <br> ⑴ and sulphuric acid in should have good corrosion resistance; <br> <br> ⑵, have loose porous structure .and inhalation of large amounts of electrolyte solution; <br> <br> ⑶, wet-out; <br> <br> ⑷, meet the use of mechanical strength and elasticity; <br> <br> ⑸, have a certain pressure .; <br> <br> ⑹, has a lower electrical resistance; <br> <br> ⑺, at a certain temperature range with a certain degree of temperature resistance; <br> <br> ⑻, has a certain resistance to ageing .and oxidation resistance. <br> <br> Types of lead-acid batteries, is now commonly used in the following categories: <br> <br> 1, porous rubber diaphragm <br> <br> Porous rubber diaphragm is a rubber, .silica and other additives manufactured, with 10 μ m following microporous separator plate. It has a long life, can be made smaller thickness, resistance is relatively low, no burrs and minor, etc. The disadvantage is that is electrolyte impregnated speed slow, costly .and difficult to make 0.5mm following sheet. This partition number for industrial battery. Porous rubber diaphragm technology requirements shown in table 1. <br> Table 1 physical and chemical properties of porous rubber diaphragm <br> <br> <br> 2. .sintered PVC spacers <br> <br> Sintering-PVC separators also known as PVC, sintering of microporous PVC resins-divisions, the divisions have penetration, high mechanical strength, good chemical stability and resistance is low, etc., while the process is .simple, low cost; the disadvantage is weak in corrosion resistance, not adapted to long-life battery, this partition number for the starting of lead-acid battery. Sintering-PVC separator technical requirements shown in table 2. <br> Table 2 physical .and chemical properties of sintered PVC spacers <br> <br> 3, meltblown polypropylene diaphragm <br> <br> Meltblown polypropylene diaphragm aka PP divisions, it is made of polypropylene resin with a certain amount of additives, through the high-pressure spray .in Microfiber, made from non-woven material, chemical treatment, according to the different specification requires production into a bag, flat and fluted, this partition has a high electrical resistance, porosity, wetting speed and low cost advantages, disadvantages are aperture larger, .high-temperature easily shrink, etc. This type of partition used for starting batteries. Meltblown polypropylene diaphragm technology requirements shown in table 3 <br> <br> Table 3 meltblown polypropylene diaphragm physico-chemical properties <br> <br> 4, porous .polyethylene separator <br> <br> Micropore polyethylene separator also called PE divisions, it is made of polyethylene powder and the additive blending, long press of the sheet baffle can be made into the bag. This separator has a strong resistance to oxidation, porosity .and pore size small, low-resistance, good toughness, and other advantages. The disadvantage is that base thin, wear-resistance to puncture inquiry and weaker. The partition number for the Starter batteries. Micropore polyethylene separator technical requirements shown in table 4. .<br> <br> Table 4-porous polyethylene separator physico-chemical properties <br> <br> Note: the ⑴, this basement thick plate is gluten bar width not less than 5mm. <br> <br> ⑵, starting type .is used to start the partition used lead-acid batteries. <br> <br> ⑶, industrial refers to industrial lead-acid battery separators <br> <br> Superfine glass fibre plate 5, <br> <br> Superfine glass fibre .plate also known as the AGM, which is used by the ultrafine glass fiber paper method into the non-compressed glass multi-layer mat and plate-type structure of divisions, the divisions have a high acid absorption, suction fluid speed, hydrophilic, surface .area and porosity High Aperture is small, the resistance is low and acid resistance and excellent resistance to oxidation and strong advantages. For cathode absorption-type structure of battery can provide good gas channel. This separator is mainly used for dilution liquid valve-regulated sealed .lead acid battery. Superfine glass fibre plate technical requirements shown in table 5. <br> <br> Table 5-fine chemical properties of glass plate <br> <br> <br> <br> Note: the ⑴, ordinary partition refers .to the outer are not accompanied by a thick glass partition. <br> ⑵, composite separators are outer garments with thick fiberglass spacers. <br> <br> ⑶, this resistance limit value corresponding to the baffle thicknessDegrees of not more than 2.00mm .. <br> <br> Third, Groove, cover <br> <br> Lead-acid battery slot, cover is the main part of lead-acid battery, in which the tank is mainly used for costumes and negative plate base and electrolyte .container and lid in the main role is to prevent debris for battery internal and prevent splashing electrolyte leakage and exhaust, bath cover should have good insulation properties, mechanical strength and corrosion-resistant, acid-proof, heat-resistance. <br> <br .> The current lead-acid battery slot, cover mainly hard rubber material, polypropylene, ABS plastic material and copolymer made of plastic material, then they are more widely used. Ebonite battery bay cover and polypropylene plastic battery bay cover mainly used for showcase for batteries ., and ABS copolymer plastic battery bay cover used in sealed maintenance-free lead-acid batteries. <br> <br> Lead-acid accumulator tank has two forms: one is single-slot, can only hold a cluster, apply to 2V series .of battery use. Second, the whole tank, made up of more than one single-slot, can contain multiple pole groups that apply to 4V, 6V, 8V, 14V, 24V series of battery use. <br> <br> Battery slot .bottom design has several bars and a group of placement direction vertical saddle supportingthe polar groups and dress plate off of avoid plate short-circuits. <br> Lead-acid accumulator tank technology requirements shown in table 6 <br> <br> Table 6 physico .-chemical properties of lead-acid accumulator tank <br> <br> <br> Note: 1, fixed anti-acid-and-control valve regulated lead acid battery slot not falling ball impact strength at low temperature. <br> Copolymer of .styrene and 2, and so non-Crystal-shaped polymer molding of the battery slot control internal stress. <br> <br> Fourth, electrolyte <br> <br> Lead-acid battery electrolyte by sulfuric acid and deionized water or distilled water .preparation of dilute sulfuric acid solution, its in the role of lead-acid batteries are: <br> <br> 1. participation in the electrochemical reaction <br> <br> 2. solutions cationic and anionic conductivity of <br> <br .> 3. plate temperature of thermal diffusion. <br> <br> Refined lead-acid battery banding liquid battery and battery without a liquid, which with liquid battery is determined by the manufacturer in the manufacturing process by charging the battery electrolyte of finished products ., for example, valve control sealed battery and startup type liquid battery, not with liquid battery is determined by the user in accordance with the regulations before using the finished annotating the electrolyte batteries, for example, dry-charged starting batteries and traction battery, etc .. <br> <br> Lead-acid battery electrolyte of nature and technology requirements in Chapter 8, has been elaborated in <br> <br> 5. lead parts <br> <br> Lead-acid battery parts mainly refers to the .pole and connection. Pole and the connection is made with lead-based alloys in accordance with the pattern size casting. <br> <br> Pole's main role is to: <br> <br> 1. complete the very groups current transfer and .to <br> <br> 2. overall battery inside connections between the single-frame. <br> <br> 3. battery lead Terminal welding system. <br> <br> Pole structure according to battery type and model comes in many .forms, but no matter what form should meet two requirements: it is necessary to ensure a reliable connection; the second is to ensure maximum operating current battery case ontologies do not overheat and melt. <br> <br> Connection of the main role is .for a single battery for external connections, to constitute a whole battery or batteries. Connection of the form is also very much in the same vein, regardless of what form should ensure a reliable connection and maximum operating current circumstances, ontology is not overheat and melt .. <br> <br> VI. work suppository <br> <br> Lead-acid batteries work suppository is a battery on the various uses of suppository, such as: <br> <br> Valve hole plug-sealed battery cover the .filling hole plug to prevent leaking electrolyte splashes. <br> <br> Acid suppositories-blocking acid mist precipitation of suppository. <br> <br> Catalyzed by palladium-tethered gas catalytic role in the realization of the hydrogen and oxygen gases synthesis of .water again. <br> <br> Sealing plug-acid precipitation and drag stalls for steam condensation drainage plug. <br> <br> 7. plastic parts <br> <br> Lead-acid batteries used in plastic parts mainly refers to .the valve-regulated sealed lead acid battery use sealing aprons and rubber cap. <br> <br> Sealing aprons also known as the "O-rings", mainly used for pole seal. <br> <br> Rubber cap and Zig, .mainly used for battery internal gas pressure limiting exhaust. <br> <br> <br> <br> <br> <br> <br> <br>.