What material is the lead-acid battery casing made of for electric vehicles?

What material is the lead-acid battery casing made of for electric vehicles?

Batteries are the source of power for electric vehicles, and most electric vehicles are fitted with lead-acid batteries, which are low-cost and cost-effective. Because they are rechargeable and can be used repeatedly, they are called ‘lead-acid batteries’. Because lead-acid batteries use a high specific gravity of lead, there is an oxidation reaction during energy conversion, so the lead-acid battery casing has to withstand heavy pressure, oxidation, corrosion and high temperatures. What is the material of the lead-acid battery shell in the electric vehicle?

1, early is to take the rubber material. Rubber shell bulky, plus asphalt sealing, complex production process, pollution, and easy to blister in the process of use, so to the elimination of.

2. Transparent PVC material. This kind of battery can see the internal structure, the maintenance especially electrolyte reduction or which cell out of the problem, a clear, but precisely because the visible internal, because of the internal electrolyte turbid, difficult to see, so not accepted by the market, rarely used, now only part of the lid is left that is transparent slot opaque kind of structure form.

3, with PP plastic, automotive batteries are all taken this material, production process with heat sealing form, fast, suitable for mass production, so the material is very popular, but the plastic performance is not as good as ABS.

4、 Use ABS material. The material is well shaped, so that large specifications fixed with more. At present, the UPS battery basically take ABS, although there are attempts to use PP production UPS battery, but PP in the UPS battery is currently not a high share

Flame-retardant ABS lead-acid battery special materials. This material is highly efficient flame retardant, can give the composite material good self-extinguishing or flame-retardant, to UL94 standards; has good heat resistance, fluidity, impact resistance, low-temperature environment by the impact does not crack, the formula is specially designed, heat sealing and glue sealing effect is good.

Modified ABS material for lead-acid battery casing

Modified ABS material for lead-acid battery casing

On 17 August 2020, the Shenzhen Municipal Government announced that Shenzhen has built over 46,000 5G base stations to achieve full coverage of 5G infrastructure in the city. This marks that Shenzhen has become the first city in the country with full coverage of 5G independent group network and the world’s first in 5G base station density. The battery pack is an important part of the communication base station to achieve uninterrupted power supply for the DC system, and the lead-acid battery shell plays the role of protector. What is the material of the lead-acid battery shell for 5G base stations?

It is understood that the general lead-acid battery shell commonly used ABS, PP, PE and other materials, while the medium and high-grade valve-controlled sealed battery is generally used ABS, non-valve-controlled battery is generally used PP, PE, etc. 5G base station with lead-acid battery shell material with Qingdao Zhongxin Huamei flame retardant ABS.

Lead-acid battery casing material physical properties table

24V 12Ah battery with ABS case material

①has high flame retardant efficiency and can give the composite material good self-extinguishing or flame retardant properties, meeting UL94 standards.
(ii) has good heat resistance, and is not easily bulged at high temperatures when injection moulded into the shell.
③Good fluidity, not easy to appear silver lines or air marks in injection moulding, good dimensional stability and good air tightness.
④Good impact resistance, low temperature environment by the impact does not crack.
⑤ Special design of the formula, good heat seal and glue seal effect.
⑥The material does not contain cadmium, chromium and other harmful toxic heavy metals, the production and application process will not cause any pollution to the environment, in line with ROHS certification requirements.

At present, Shenzhen is carrying out demonstrations of government applications in 10 areas such as healthcare and transportation, and in 10 industry areas such as ultra-high definition video and industrial internet. 5G base stations are the core equipment of 5G networks, providing wireless coverage and realizing wireless signal transmission between wired communication networks and wireless terminals.

Application, material and characteristics of 24V 12Ah battery with ABS case

Application, material and characteristics of 24V 12Ah battery with ABS case

24V 12Ah battery with ABS case Application

The case of a battery is used to hold the electrolyte and the pole plate set and should be acid, heat and shock resistant. The case is mostly made of hard rubber or polypropylene plastic and has a monolithic structure with raised ribs at the bottom to hold the plates. The shell is divided into 3 or 6 unconnected compartments by the intervening walls and the compartments are connected in series with a lead link. The upper part of the battery housing is sealed with a battery cover of the same material. The battery cover is provided with a filling hole corresponding to each cell for adding electrolyte and distilled water and for measuring the specific gravity (also called relative density), temperature and level of the electrolyte. Ventilation holes in the cover of the filler hole allow the gases generated during the chemical reaction of the battery to escape smoothly.
The structural design of the valve regulated sealed lead-acid battery shell and cover mainly includes strength design, heat dissipation design and pole sealing design on the cover. The strength design requires that the outer wall of the battery should not be significantly deformed by gas expansion when tightly assembled and subjected to internal air pressure. For pp shell, steel shell reinforcement should be added; for 2v series batteries, the thickness of abs and pvc shells should generally reach 8~10mm. heat dissipation design requires a large heat dissipation area of the battery shell, good thermal conductivity of the material and the smaller the wall thickness, the better. The structure of the case is relatively simple, only the strength and cover package can be considered.

24V 12Ah battery with ABS case characteristics

Valve regulated sealed lead-acid battery cases for power applications are usually made of a strong synthetic resin with a special treatment for high mechanical strength and a cover plate made of the same material and joined by heat welding. The battery cover encloses the inner chamber of the battery tank. The battery cover has 6 filling holes, through which the electrolyte of each individual battery is filled. The internal cavity of the battery tank is connected to the outside world via an exhaust pipe, which allows the gases generated during charging of the battery to be exhausted. The filling and venting holes are sealed by a safety valve to ensure the safety of the battery seal.
The sealing of the battery shell cover is divided into heat sealing and glue sealing, of which heat sealing is the most reliable sealing test. pp material is used for heat sealing, abs and pvc materials are generally used for glue sealing, the key to glue sealing is to use the appropriate epoxy resin. Pole sealing technology is a key technology in the production of valve-regulated sealed lead-acid batteries, and different manufacturers use different methods. The conventional battery is made of abs, pp, pe etc., while the medium and high-grade valve-controlled sealed lead-acid battery is generally made of abs and the non-valve-controlled battery is generally made of pp, pe etc.

24V 12Ah battery with ABS case material

Most of the electric car batteries are made of abs and other materials, which are rubber sealed batteries; most of the car batteries are made of pp and pe, which are heat-sealed batteries. Due to the different sealing methods, the equipment for assembling electric car batteries and car batteries are also different, and this is one of the differences between electric car battery assembly equipment and car battery assembly equipment.

24V 12Ah battery with ABS case features

24V 12Ah battery with ABS case features

The battery is a device that converts chemical energy directly into electrical energy and is designed to be recharged by a reversible chemical reaction. The battery case contains the electrolyte and the electrode plate. The battery will continue to heat up during the charging and discharging process, so the battery case needs to be highly heat resistant and flame retardant. Secondly, the battery shell may be damaged by drops and impacts when the battery is in use, so it also needs to have good impact resistance.

Early batteries were mainly made of hard rubber, which was hard and brittle and had poor impact resistance, and ABS, a high strength, tough and easy to shape polymer material, has been used to make battery housings. In order to make ABS materials with high flame retardant and heat resistant performance, most of the ABS materials are added with flame retardant and heat resistant agent to improve the flame retardant and heat resistant performance of ABS materials, such as the Chinese patent with authorization number CN101235184B discloses a kind of flame retardant ABS material for lead-acid battery case

24V 12Ah battery with ABS case features

1. Farewell to the traditional metal case, not only the weight is greatly reduced, but also the cost is saved
2. Imported ABS raw materials are used, the quality is guaranteed
3. ABS moulded products with high surface hardness, stable dimensional shape, toughness, good chemical resistance, good corrosion resistance and excellent impact resistance
4. With a variety of colours and specifications, can be freely matched
Uses.
5.Various electric car and electric toy battery plastic shells
6. Home back-up power batteries
7. cleanliness: the outer wall and inner cavity of the bottom groove, upper cover and upper cover piece are clean and dry, free from oil, plastic filaments and other debris.
8. Cleanliness: no marks or strains on the inner and outer surfaces of the plastic shell, no cracks in any part.
9. Standard degree: the colour of the bottom groove, top cover and top cover piece is basically the same as the standard colour (there is no obvious colour difference visible to the naked eye and no different colour visible to the naked eye when looking at the plastic shell under bright light at a distance of 30±3cm from the plastic shell.) The colour of the cover is generally the same as the standard colour (no difference in colour visible to the naked eye under bright light at 30±cm from the shell).
10. Protection: the bottom groove, top cover and cover piece are protected by protective film.
11. Dimensional fit.
Bottom groove, top cover with uniform gap, the gap in each direction is less than 1.5mm
The fit gap between the top cover piece and the top cover in all directions is less than 0.5mm
12. Heat resistance: the sample is put into a constant temperature box at 70±2℃ and kept for 3 hours, the change in length, width and height is less than 1.3mm

What is the difference between using PP and ABS as battery casing materials?

ABS material and PP material are the two main materials used to make battery housings.
ABS material has good strength and a brighter colour, but its molecular density is low and water vapour can easily penetrate the battery tank walls. If the battery is used for a long time, the battery will easily lose water and may shorten the life of the battery. Batteries made of ABS are usually sealed with epoxy glue, which is prone to ageing and makes the battery less airtight. Furthermore, the sealing process is usually manual, which makes it difficult to ensure the stability of the battery. Domestic batteries are basically made of ABS material.
The PP material is soft, stretchable and will not burst under high pressure. PP material has good heat solubility and is suitable for battery heat sealing process, which is difficult to glue seal. The use of machine heat sealing can ensure the sealing effect of the battery and the stability of the battery quality. Foreign imported batteries basically use PP material to make batteries.

How much do you know about the golf cart battery models?

How much do you know about the golf cart battery models?

Golf cart battery mainly use 6V, 8V, 12V battery in series as power driving, the price of different models of battery is different, size parameters also have error, this kind of course vehicle also called: electric golf cart, excursion car, patrol car, classic car, electric buggy, etc., to battery as traction, this type of plate battery, tube type mostly, designed for long life and Good climbing power, golf cart battery using tubular positive plate, including alloy plate grid, non-metallic casing, active material, which is characterized by the upper and lower ports of the non-metallic casing and the contact of the plate grid are provided with plastic capping with through holes and plastic capping with blind holes, the cross-section of the conductive bars in the plate grid is rectangular, alloy plate grid using metal cold stamping parts.

The golf cart, also known as the electric golf cart, is an environmentally friendly passenger vehicle designed and developed specifically for golf courses. It can also be used in resorts, villa areas, garden hotels, tourist attractions etc. It will be used for short distance transport from golf courses, villas, hotels and schools to private users.

Golf is a game that fascinates many people. On a golf course, every person, every movement, every blade of grass and every molecule of air is a delight to the eye. Every movement on the course requires perfection, including driving a golf cart.

Depending on the season and course conditions, the club will have different rules for driving the cart, the most common of which are

1. The cart is restricted to the cart path. This rule applies to courses with wet and soft surfaces to avoid damage to the fairway turf due to cart tyre rolls.

2. The 90 degree rule. This rule requires the cart to be driven mainly on the cart path, and once it has reached a position level with the ball drop, it may turn at a 90 degree right angle and drive across the cart path directly to the ball. After the player has hit the ball the cart is then driven back down the lane the same way it was driven and continues on its way. The 90 degree rule allows players to drive right up to the pin with minimal damage to the fairway grass.

Lead-acid battery is now golf cart battery an important source of power, most of the electric cart battery in the golf course because the charging curve can not be matched and lead to charging damage, by no means alarming, battery charging function is good or bad to the battery life and use function plays a pivotal role, it is necessary to pay attention to.

1, the depth of discharge of the battery has a great impact on the battery cycle life, this is because the deeper the depth of discharge, the greater the amount of electrode expansion and shortening, the more active material off the positive electrode, and then lose the discharge characteristics, function decline, until the life stop. So the battery should be used to avoid deep discharge, shallow and diligent charging, the general situation should be done: the battery to discharge depth of 50%-70% when charging a charge can be.

2, the battery discharge to stop the voltage, continue to discharge (over discharge) will seriously damage the battery, because at this time is very easy to form irreversible sulfation, and then make the charging recovery capacity is poor, and even can not be repaired. So the battery should be used to avoid over-discharge, “under-voltage protection” is an effective measure. “Under-voltage protection” measures are controlled by the electric car controller, but because the electric car instrument and indicator lights and other power-consuming appliances are not controlled by the controller, so once the electric car lock is closed on the beginning of the electricity, although the current is small, but if the battery is discharged for a long time, the battery will be over-discharged. Therefore, the lock should not be opened for a long time, and should be turned off immediately when not in use.

3, the charging current should be less than or equal to the battery can withstand the charging current, otherwise, overcharging excess current will make the electrolytic liquid consumed too quickly, and serious precipitation phenomenon, a long time will make charging becomes good, so charging as far as possible to avoid overcharging. The charger produced by the regular manufacturer can ensure that the battery is not overcharged.

4, lead-acid batteries are especially afraid of loss of discharge, loss of battery placed in 3-7 days, will likely be lasting damage, therefore, the battery after use, please quickly charge. For batteries that are not used for a long time, the battery should be charged once every 15 days or so to compensate for the loss of self-discharge power when the battery is stored.

5, the battery in the high temperature season operation, the primary problem of over-charging. Therefore, the battery temperature should be reduced as much as possible in summer to ensure good heat dissipation, avoid charging after the cool sun, and should be away from heat sources. At low temperatures, charging has the primary problem of poor charging tolerance and insufficient charging to form a battery power loss. Low temperature should adopt insulation and anti-freezing measures, especially when charging should be placed in a warm environment, which is conducive to ensuring sufficient power, avoiding the occurrence of irreversible sulfation and prolonging the service life of the battery.