Battery terms
AC
Alternating current is the condition under which the motion of charge in a conductor varies cyclically.
Acid
A chemical that can release hydrogen ions when mixed with water. Sulfuric acid, H2SO, is used in lead acid batteries as the electrolyte.
Accumulator
A rechargeable battery or cell.
Active Material
The chemicals in the battery produce and store electrons in the electrochemical cell to release them as electrical energy. The active substance reacts with the electrolyte upon discharge to provide valence electrons from the oxidation and reduction reactions occurring at the positive and negative electrodes.
AGM (Absorbent Glass Mat)
This is a term commonly applied to a sealed recombinant lead-acid battery using a non-woven separator composed almost entirely of glass fibers with effect of absorbing and retaining electrolytes between single-cell plates. AGM is essentially a glass mat in a cell that is compacted to ensure it absorbs the right amount of acid and holds pressure on the active material to prevent loss of contact between the AM and the plates' meshes.
Amp (Amp, A)
A unit of measurement for the flow of electrons in a circuit. 1 amp = 1 coulomb per second.
AmpereHour (Amp-hrs, Ah)
a unit of measure for a battery's ability to store electricity, obtained by multiplying the amperage in amperes by the discharge time in hours. (For example, a battery that delivers 5 amps for 20 hours delivers 5 amps x 20 hours = 100 amps.)
Anode
The negative electrode of the cell. The anode loses electrons during discharge (oxidation) and gains electrons during charging (reduction).
Battery
One or more electrochemical cells connected in series or parallel by inter-cell connections.
BMS
An electronic system that monitors batteries to maximize life and protect batteries from damage caused by factors such as over- and under-charging, imbalance of individual cells, and variation temperature change too high. The battery must also provide security and allow communication with other devices.
Boost Charge
One or more short additional boost charges applied to the battery, usually during a duty cycle, to ensure that it will perform its application duty.
BCI Group
The Battery Council International (BCI) number identifies a battery by its physical and electrical characteristics. Dimensions (L x W x H), voltage, terminal arrangement polarity, terminal shape and type. This feature allows the buyer to determine the type of battery that is right for his vehicle.
Capacity
The capacity of a battery is specified in the number of amps the battery will deliver at a particular discharge rate and temperature. The capacity of the battery is not a fixed value and decreases as the discharge rate increases. The capacity of a battery is affected by a number of factors such as the weight of the active substance, the density of the active substance, the adhesion of the active substance to the grid, the number, design and size of the plates. way, separator design, available electrolyte density and amount, grid alloy, ultimate limiting voltage, discharge rate, temperature, internal and external resistance, lifetime and history battery life.
Cathode
The positive electrode of the cell. The cathode gains electrons during discharge (reduction) and loses electrons during charging (oxidation).
Cell
Short for an electrochemical cell. They are two different materials, usually the metal in an ion-conducting electrolyte. Different metals provide potential differences based on their position in the electrochemical panel. This difference produces an EMF or single cell voltage that determines the voltage of the battery. For nickel-cadmium it is 1.2 volts per cell and for lead acid it is 2 volts.
Charge Acceptance
A battery's ability to accept and store energy based on given external parameters such as time, temperature, charge state, charge voltage, or battery history. It is usually related to the internal resistance and capacity of the battery.
Cold Cranking Amps (CCA)
This is the rating for a 12V Starter Lighting Ignition (SLI) battery to represent the ability of an engine to start in cold weather. It is defined as the number of amps that can be drawn from a new, fully charged battery at 180°C in 30 seconds and still maintain a voltage above 7.2 volts.
Charger
A device that provides electrical energy to the battery when the battery is discharged.
Conductivity
The ease with which electric current passes through a substance. In the equations, conductivity is denoted by a capital G. The standard unit of conductivity is the siemens (abbreviated S), formerly known as the mho, which is the reciprocal of resistance (ohm).
Container
The box that holds the cell or battery components. It should be inert to the electrolyte used and be as impact resistant as possible.
Corrosion
Chemical or electrochemical reaction of a material and its medium, usually a metal, to produce a compound that is the product of the reaction. In metals it is caused by an oxidation reaction (loss of electrons) that produces a metal compound, e.g. Discharge of Pb to PbSO in the presence of sulfuric acid.
Current
Any movement of charge carriers, such as subatomic charge carriers (e.g. negatively charged electrons, positively charged protons), ions (lost atoms or gain one or more electrons) or holes (the lack of such electrons can be considered as positive particles). The amperage in a conductor, where the charge carriers are electrons, is a unit of time that measures the amount of charge passing through any point in the wire in a unit of time.
Cycle
In battery terms, a cycle is a complete sequence of discharge from a fully charged state plus a full recharge to a fully charged state.
Cycle Life
The specified number of charge-discharge cycles the battery can perform until its discharge voltage reaches a specified minimum value. Parameters of discharge depth, discharge and recharge rates, voltage settings for charge and discharge plus temperature are often defined to describe the nature of the life test. The number of battery cycles to complete depends on many factors beyond the established test parameters. Typical elements are battery design, battery chemistry, and construction materials.
Deep discharge
This is a discharge using current that brings the battery to a state where the voltage is the minimum recommended by the manufacturer for a particular discharge rate. For example, a lead-acid traction battery that will be discharged at 1.7 volts per cell over a period of 5 hours will be discharged 100% at a rate of C5 Battery
Deep-Cycle Battery
The battery is designed to provide the maximum number of discharge cycles to the minimum voltage recommended by the manufacturer for a particular discharge rate.
Discharging
When a battery is connected to a load and supplying current, it is said to be discharging.
Electrolyte
Electrochemical batteries require a conductive medium to transfer ions to allow charging and discharging of the positive and negative electrodes. In lead batteries, the electrolyte is sulfuric acid diluted with water. As a conductor providing water and sulfate salts for electrochemical reactions: PbO2 + Pb + 2H2SO4 = 2PbSO4 + 2H2O. In a lithium-ion battery, the electrolyte does not react with the electrodes, it only transfers Li+ ions from the cathode to the anode when charging and from the anode to the cathode when discharging
Electronic tester
An Electronic device that assesses the condition of a battery by measuring resistance or impedance which can include ohmic resistance, capacitance, metallic and ionic conductivity. Often these devices use high frequency pulses and draw low currents.
Element
Set of anode and cathode plates assembled by means of a separator between the plates.
Equalization Charge
The process of ensuring that all cells in a battery are in a fully charged state. The electrolyte in each cell should also have a uniform density and not be stratified. This is typically a process performed in installations connected to multiple batteries, where undercharging or frequent discharging would prevent individual batteries or cells from reaching the same state of charge. The charging current is usually low and the time can be up to several days.
Formation
In battery manufacturing, training is the process of charging a battery for the first time. Electrochemically, the formation process turns the lead oxide sludge on the positive grid into lead dioxide and the lead oxide sludge on the negative grid into metallic porous lead.
GEL
The name commonly applied to the electrolyte of a lead-acid battery that has been mixed with a chemical agent to give a non-permanent structure in liquid form. This can be done using a curing agent or by adding a fine silica powder. The purpose is to prevent electrolyte spillage and to allow the recombination of hydrogen and oxygen produced by the decomposition of water during charging (see VRLA batteries). Batteries made with enameled electrolyte are commonly referred to as GEL batteries.
Grid
A metal or metal alloy frame that supports the active panel material. It conducts the current generated by the active material to the battery terminals during discharge and to the terminals to the active material when charging.
Ground
The reference voltage of the circuit. In automotive use, the result of attaching a battery cable to the body or frame of the vehicle is used as a conduit to complete a circuit rather than direct wiring from a component. Today, more than 99% of automotive and LTV applications use the negative battery terminal as ground.
Group
A battery cell with the correct number of separated anode and cathode plates will meet the battery's rated capacity.
Group size
Battery Council International (BCI) assigns numbers and letters to commonly used batteries. There are standards for maximum container sizes, terminal locations and types, and special container features.
Hydrometer
Instrument used to estimate the concentration of acid or alkali in the electrolyte of a battery by measuring its specific gravity. Intercell Connection: A structure that connects adjacent cells in series, the anode of one cell to the cathode of the next, in the battery.
Impedance (Z)
effective resistance of a circuit or of an electrical component for AC. It follows from the combined effects of the ohmic resistance and reactance and units similar to wars, that is to say ohms.
Internal resistance (IR)
A battery with a resistance, a capacitor and an inductor. Below is a representation of a total resistance of the battery is called model Randles Ro= Ohmic resistance of Battery metallics + Electrolyte + Separators RCT= Charge transfer resistance across the electrical double layer (EDL) Cdl=Capacitance of the double layer L=High frequency inductance of the metallic components Zw= Warburg impedance representing mass transport effects E=EMF of the circuit
lead-acid battery
including plate including a case lead metal and conductive materials based on lead oxide activity for positive and pure sponge lead to negative. The electrolyte is diluted sulfuric acid in the range from 30% to 40% by weight of acid.
Load Tester
A tool that draws current from a battery while measuring voltage. It determines the capacity to provide capacity of the battery
Low maintenance battery
The battery does not need frequent water replenishment to recharge the electrolyte. Usually 3-6 months between refills with controlled charging.
MCA (Marine Clamp Ampere)
MCA is an industry rating that determines the ability of marine batteries to deliver large amounts of amperage for a short period of time. Since marine batteries are generally never used at temperatures below freezing, marine amps cranks are measured at 32°F (0°C) as opposed to 0°F (18C) for crank amps starting. cold motion. The rating is the number of amps that can be drawn from a marine battery at 32°F for 30 seconds while maintaining a voltage of at least 7.2 volts for a 12 volt battery. The higher the MCA rating, the higher the starting capacity of the marine battery.
Maintenance-Free
Batteries generally need no maintenance over their lifetime when the correct charging method is used.
Negative
The direction of electron flow describes electric potential. The battery's cathode provides electrons to reduce active sheet material during charging.
Ohm (Ω)
a unit for measuring resistance or impedance in an electrical circuit. Defined in SI units is the SI unit of resistance, carrying a current of one ampere when subjected to a voltage of one volt.