Car Battery Ns60alppu

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Car Battery Ns60alppu

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A typical 12 V, 40 Ah lead-acid car battery

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An automotive battery is a rechargeable battery that supplies electrical current to a motor vehicle. Its main purpose is to feed the starter, which starts the engine. Once the engine is running, power for the car's electrical systems is supplied by the alternator.

  • 1Battery in modern cars
  • 4Specifications

Battery in modern cars[edit]

Gasoline and Diesel engine[edit]

Typically, starting uses less than three percent of the battery capacity. For this reason, automotive batteries are designed to deliver maximum current for a short period of time. They are sometimes referred to as 'SLI batteries' for this reason, for Starting, Lighting, and Ignition. SLI batteries are not designed for deep discharging, and a full discharge can reduce the battery's lifespan.[1]

As well as starting the engine, an SLI battery supplies the extra power necessary when the vehicle's electrical requirements exceed the supply from the charging system. It is also a stabilizer, evening out potentially damaging voltage spikes.[2] While the engine is running, most of the power is provided by the alternator, which includes a voltage regulator to keep the output between 13.5 and 14.5 V.[3]Modern SLI batteries are lead-acid type, using six series-connected cells to provide a nominal 12 volt system (in most passenger vehicles and light trucks), or twelve cells for a 24 volt system in heavy trucks or earth-moving equipment, for example.[4]

Electric cars[edit]

Battery electric vehicles are powered by a high-voltage electric vehicle battery, but they usually have an automotive battery as well, so that they can use standard automotive accessories which are designed to run on 12 V.

History[edit]

Early cars did not have batteries, as their electrical systems were limited. A bell was used instead of an electric horn, headlights were gas-powered, and the engine was started with a crank. Car batteries became widely used around 1920 as cars became equipped with electric starters. The sealed battery, which did not require refilling, was invented in 1971.[5]

The first starting and charging systems were designed to be 6-volt and positive-ground systems, with the vehicle's chassis directly connected to the positive battery terminal.[6] Today, almost all road vehicles have a negative ground system.[7] The negative battery terminal is connected to the car's chassis.

The Hudson Motor Car Company was the first to use a standardized battery in 1918 when they started using Battery Council International batteries. BCI is the organization that sets the dimensional standards for batteries.[8]

Cars used a 6 V electrical systems and batteries until the mid-1950s. The changeover from 6 to 12 V happened when bigger engines with higher compression ratios required more electrical power to start.[9] Smaller cars, which required less power to start stayed with 6 V longer, for example the Volkswagen Beetle in the mid-1960s and the Citroën 2CV in 1970.

In the 1990s a 42V electrical system standard was proposed. It was intended to allow more powerful electrically driven accessories, and lighter automobile wiring harnesses. The availability of higher-efficiency motors, new wiring techniques, and digital controls, and a focus on hybrid vehicle systems that use high-voltage starter/generators have largely eliminated the push for switching the main automotive voltages.[10]

Battery

Design[edit]

An automobile battery is an example of a wet cell battery, with six cells. Each cell of a lead storage battery consists of alternate plates made of a lead alloy grid filled with sponge lead (cathode plates) or coated with lead dioxide (anode). [11] Each cell is filled with a sulfuric acid solution, which is the electrolyte. Initially, cells each had a filler cap, through which the electrolyte level could be viewed and which allowed water to be added to the cell. The filler cap had a small vent hole which allowed hydrogen gas generated during charging to escape from the cell.

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The cells are connected by short heavy straps from the positive plates of one cell to the negative plates of the adjacent cell. A pair of heavy terminals, plated with lead to resist corrosion, are mounted at the top, sometimes the side, of the battery. Early auto batteries used hard rubber cases and wooden plate separators. Modern units use plastic cases and woven sheets to prevent the plates of a cell from touching and short-circuiting.

In the past, auto batteries required regular inspection and maintenance to replace water that was decomposed during operation of the battery. 'Low-maintenance' (sometimes called 'zero-maintenance') batteries use a different alloy for the plate elements, reducing the amount of water decomposed on charging. A modern battery may not require additional water over its useful life; some types eliminate the individual filler caps for each cell. A weakness of these batteries is that they are very intolerant of deep discharge, for example when the car battery is completely drained by leaving the lights on. This coats the lead plate electrodes with sulfate deposits and can reduce the battery's lifespan by a third or more.

VRLA batteries, also known as absorbed glass mat (AGM) batteries are more tolerant of deep discharge, but are more expensive.[12] VRLA batteries do not permit addition of water to the cell. The cells each have an automatic pressure release valve, to protect the case from rupture on severe overcharge or internal failure. A VRLA battery cannot spill its electrolyte which makes it particularly useful in vehicles such as motorcycles.

Batteries are typically made of six galvanic cells in a series circuit. Each cell provides 2.1 volts for a total of 12.6 volts at full charge.[13] During discharge, a chemical reaction releases electrons, allowing them to flow through conductors to produce electricity. As the battery discharges, the acid of the electrolyte reacts with the materials of the plates, changing their surface to lead sulfate. When the battery is recharged, the chemical reaction is reversed: the lead sulfate reforms into lead dioxide. With the plates restored to their original condition, the process may be repeated.

Some vehicles use other starter batteries. The 2010 Porsche 911 GT3 RS has a lithium-ion battery as an option to save weight.[14] Heavy vehicles may have two batteries in series for a 24 V system or may have series-parallel groups of batteries supplying 24 V.[15]

Specifications[edit]

Physical format[edit]

Batteries are grouped by physical size, type and placement of the terminals, and mounting style.[12]

Amp hours (Ah)[edit]

Ampere-hours (Ah or A·h) is a unit related to the energy storage capacity of the battery. This rating is required by law in Europe.

Cranking amperages (CCA, CA, MCA, HCA)[edit]

  • Cold cranking amperes (CCA): the amount of current a battery can provide at 0 °F (−18 °C). Modern cars with computer controlled fuel-injected engines take no more than a few seconds to start and CCA figures are less important than they used to be.[16] It is important not to confuse CCA with CA/MCA or HCA numbers as the latter will always be higher due to warmer temperatures. For example, a 250 CCA battery will have more starting power than a 250 CA (or MCA) one, and likewise a 250 CA will have more than a 250 HCA one. [17]
  • Cranking amperes (CA): the amount of current a battery can provide at 32 °F (0 °C).
  • Marine cranking amperes (MCA): like CA, the amount of current a battery can provide at 32 °F (0 °C), and often found on batteries for boats (hence 'marine') and lawn garden tractors which are less likely to be operated in conditions where ice can form.[18]
  • Hot cranking amperes (HCA) is the amount of current a battery can provide at 80 °F (27 °C). The rating is defined as the current a lead-acid battery at that temperature can deliver for 30 seconds and maintain at least 1.2 volts per cell (7.2 volts for a 12-volt battery).[citation needed]

Reserve capacity minutes (RCM)[edit]

A battery's ability to sustain a minimum stated electrical load; it is defined as the time (in minutes) that a lead-acid battery at 80 °F (27 °C) will continuously deliver 25 amperes before its voltage drops below 10.5 volts.[citation needed]

Group size[edit]

Battery Council International (BCI) group size specifies a battery's physical dimensions, such as length, width, and height. These groups are determined by the organization. [19][20][21]

Date codes[edit]

  • In the United States there are codes on batteries to help consumers buy a recently produced one. When batteries are stored, they can start losing their charge. A battery made in October 2015 will have a numeric code of 10-5 or an alphanumeric code of K-5. 'A' is for January, 'B' is for February, and so on (the letter 'I' is skipped).[16]
  • In South Africa the code on a battery to indicate production date is part of the casing and cast into the bottom left of the cover. The code is Year and week number. (YYWW) e.g. 1336 is for week 36 in the year 2013.

Use and maintenance[edit]

Excess heat is a main cause of battery failures, as when the electrolyte evaporates due to high temperatures, decreasing the effective surface area of the plates exposed to the electrolyte, and leading to sulfation. Grid corrosion rates increase with temperature.[22][23] Also low temperatures can lead to battery failure.[24]

A vehicle with a flat battery can be jump started by the battery of another vehicle or by a portable battery booster, after which a running engine will continue to charge the battery.[25]

Corrosion at the battery terminals can prevent a car from starting due to electrical resistance, which can be prevented by the proper application of dielectric grease.[26][27]

Sulfation is when the electrodes become coated with a hard layer of lead sulfate, which weakens the battery. Sulfation can happen when battery is not fully charged and remains discharged.[28] Sulfated batteries should be charged slowly to prevent damage.[29]

SLI batteries are not designed for deep discharge, and their life is reduced when subjected to this.[30]

Car batteries using lead-antimony plates require regular topping-up with pure water to replace water lost due to electrolysis and evaporation. By changing the alloying element to calcium, more recent designs have reduced the rate of water loss. Modern car batteries have reduced maintenance requirements, and may not provide caps for addition of water to the cells. Such batteries include extra electrolyte above the plates to allow for losses during the battery life.

Some battery manufacturers include a built-in hydrometer to show the state of charge of the battery.

A positive (red) jumper cable connected to battery post. An optional hydrometer window is visible by the single jumper clamp. The black negative jumper clamp is not shown.

The primary wear-out mechanism is the shedding of active material from the battery plates, which accumulates at the bottom of the cells and which may eventually short-circuit the plates. This can be substantially reduced by enclosing one set of plates in plastic separator bags, made from a permeable material. This allows the electrolyte and ions to pass through but keeps the sludge build up from bridging the plates.

Environmental impact[edit]

Battery recycling of automotive batteries reduces the need for resources required for the manufacture of new batteries, diverts toxic lead from landfills, and prevents the risk of improper disposal. Once a lead acid battery ceases to hold a charge, it is deemed a used lead-acid battery (ULAB), which is classified as hazardous waste under the Basel Convention. The 12-volt car battery is the most recycled product in the world, according to the United States Environmental Protection Agency. In the U.S. alone, about 100 million auto batteries a year are replaced, and 99 percent of them are turned in for recycling.[31] However the recycling may be done incorrectly in unregulated environments. As part of global waste trade ULABs are shipped from industrialized countries to developing countries for disassembly and recuperation of the contents. About 97 percent of the lead can be recovered. Pure Earth estimates that over 12 million third world people are affected by lead contamination from ULAB processing.[32]

See also[edit]

References[edit]

  1. ^Johnson, Larry. 'Battery Tutorial'. chargingchargers.com. Charging Chargers. Retrieved 2016-02-15.
  2. ^'What is a lead battery?'. batterycouncil.org. Retrieved 2016-02-17.
  3. ^'Automotive Charging Systems - A Short Course on How They Work'. www.carparts.com. Archived from the original on 2015-09-17. Retrieved 2016-02-17.
  4. ^'Q & A: Car Batteries'. van.physics.illinois.edu. Retrieved 2016-02-18.
  5. ^'History of the car battery'. www.racshop.co.uk. Retrieved 2016-02-17.
  6. ^'Positive Vs. Negative Ground - Will charger work on positive ground vehicles?'. www.batteryfloatchargers.com. Retrieved 2016-02-18.
  7. ^'Why POSITIVE EARTH?'. mgaguru.com. Retrieved 2019-04-20.
  8. ^'6-Volt Batteries'. www.hemmings.com. Retrieved 2016-02-17.
  9. ^'6 Volt to 12 Volt Changeover'. www.fillingstation.com. Retrieved 2016-02-17.
  10. ^'Whatever Happened to the 42-Volt Car?'. Popular Mechanics. 2009-10-01. Retrieved 2016-02-18.
  11. ^Elert, Glenn. 'Voltage of a Car Battery'. hypertextbook.com. Retrieved 2016-02-17.
  12. ^ ab'How to Get the Right Car Battery'. Consumer Reports. Retrieved 2016-02-17.
  13. ^'Basic Battery Care'. Popular Mechanics. 2006-03-29. Retrieved 2016-02-17.
  14. ^Wert, Ray (2009-08-19). '2010 Porsche 911 GT3 RS: Track-Ready, Street-Legal And More Power'. Jalopnik.com. Archived from the original on 21 October 2009. Retrieved 2009-09-18.
  15. ^'Automotive/SLI Batteries - Batteries by Fisher'. Batteries by Fisher. Retrieved 2016-02-15.
  16. ^ ab'From Our Experts: Car Battery Tips'. Consumer Reports. December 2, 2015. Archived from the original on December 6, 2015. Retrieved 2016-02-17.
  17. ^'Winter Is Coming.. Do You Know Your Battery's CCA Rating?'. Bauer Built Inc.
  18. ^'Marine Battery vs. Car Battery: What Are the Differences?'. October 4, 2018.
  19. ^'BCI Battery Group Size Chart'. www.batteryequivalents.com.
  20. ^'BCI Battery Service Manual 14th Edition - Download - Battery Council International'. batterycouncil.org.
  21. ^'bci-battery-technical-manual'. yumpu.com.
  22. ^Ruetschi, Paul (March 10, 2004), 'Aging mechanisms and service life of lead–acid batteries', Journal of Power Sources, 127 (1–2): 33–44, Bibcode:2004JPS..127..33R, doi:10.1016/j.jpowsour.2003.09.052
  23. ^'Car batteries Buying Guide', Consumer Reports, August 2016
  24. ^The Most Common Reasons for 12 Volt Car Battery Drain
  25. ^Magliozzi, Tom; Magliozzi, Ray (Apr 1, 2007), 'Is revving the engine a good idea during a jump-start? Find out', Car Talk, Tappet Brothers
  26. ^Meyer, Alex (17 December 2017). 'Why do car batteries corrode?'. Gear4Wheels.
  27. ^'How to Clean Corroded Car Battery Terminals'. wikiHow.
  28. ^'Description and treatment of sulphated batteries using the mmf charger and the discharger/analyzer'.
  29. ^Witte, O. A. (1922). The Automotive Storage Battery Its Care and Repair. The American Bureau of Engineering (Full text via Project Gutenberg.).
  30. ^Johnson, Larry. 'Battery Tutorial'. www.chargingchargers.com. Retrieved 2016-02-15.
  31. ^'Who Knew? A Car Battery Is the World's Most Recycled Product'. Green Car Reports. Retrieved 2016-02-18.
  32. ^'Projects Reports'. www.worstpolluted.org. Retrieved 2016-02-18.

External links[edit]

Retrieved from 'https://en.wikipedia.org/w/index.php?title=Automotive_battery&oldid=916359904'

Specification Guide www.ultrabatteries.co.nzHCB TECHNOLOGIES LIMITED HCB Technologies Limited is the only 100% New Zealand owned and operated company trading nationally in the New Zealand wholesale battery market. Branches are located throughout the major centres, servicing customers directly or through a distributor network. HCB Technologies core business is Automotive, Commercial, Marine and Deep Cycle Batteries with successful expansion into related ranges.

These include Standby Batteries, Gelled and AGM Valve Regulated Batteries, US Manufactured Deep Cycle Batteries, Motor Cycle Batteries, Battery Chargers, Testers and Electrical Accessories. In November 2006 the company was acquired by Hellaby Holdings Ltd, a successful publicly listed New Zealand investment group with substantial automotive company ownership and industry experience. Under the operation of Hellaby, HCB Technologies has continued to expand, following the same principles the business was founded on and is recognised for. The company philosophy is; to provide quality products, supplied with integrity, backed by excellent people and service.

The vision and goal, and market point of difference, is to supply and support our customers and not compete with them. From small beginnings in Auckland in 1988, we were known as Harbour City Batteries and established on family ownership and values. Over time, HCB Technologies has experienced steady growth to today s position as a significant player in the New Zealand battery market. Additional branches and sales teams throughout the country have reinforced this position and expanded our service level capabilities to meet the needs of our loyal and valued customer base. The customer service, support and technical expertise provided by HCB Technologies is thoroughly proven in the New Zealand and Pacific markets. The company has an enviable reputation for product ranges that are well researched and tested, highly suitable and highly reliable. We aim to continue this philosophy to meet the needs of our customers, and their customers, today and in the future.

Providing quality products, supplied with integrity, backed by excellent people and service.

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