How many discharge current of lead acid batteries will damage the battery?

Early access to electricity, charging capacitor C1 passes through 10 k resistor R1 charge, C1 electricity increase from low level to Vcc slowly and become stable.

Power cuts, C1 potential close to Vcc, through two road IC the Vcc power supply end of the discharge, all the way through the R1 discharge, all the way through the diode discharge quickly, without the presence of D1, C1 only through 10 k resistor to discharge to the Vcc power supply end of the IC slowly, so, the presence of D1, discharge speed is much faster than the speed of charging.

Yes, since the role of the diode, when the power electricity, diode reverse bias, equivalent to disconnect, power through the resistance to the capacitance charging, charging time and the size of the capacitance and resistance, when power outage, can think of the power supply voltage is zero, namely the VCC to ground short circuit, the capacitor through the diode, resistance discharge, due to the diode conductor resistance is small, so the discharge time is short.

Capacitor power failure in the electric circuit, the capacitor stored has a certain amount of voltage, there are some other load in the circuit or component is slow discharge, can also be artificially with small resistance or wires short-circuit rapid discharge (low pressure).

What is the principle of capacitance? What connection?

Capacitance is between two metal electrodes with insulating material (medium).When add certain voltage on two electrodes, in which produces an electric field between two metal electrodes, in under the action of electric field, between the insulation material (medium) electronic pull into the part near the positively charged plate, forming a lasting electric field, the process is to give the capacitance charging; After add disappeared in the voltage on the two electrodes, electron from the nucleus and the dual function of electric field force, will tend to be returned to in situ, when external connected, electronic, electric field force, through the external circuit back to another electrode plates, this process is called discharge.

Capacitance can accord to need to lead, in general, each plate is only a line, so a capacitor are two feet.

You said 3 feet or 4 feet capacitance, are generally double capacitance (two capacitance together, 3 feet inside is in series, 4 feet of two independent), capacity is generally above the 2 x 000 mu F.

Capacitor power failure in the electric circuit, the capacitor stored has a certain amount of voltage, there are some other load in the circuit or component is slow discharge, can also be artificially with small resistance or wires short-circuit rapid discharge (low pressure).

To discharge the capacitance of the poles respectively with a certain quantity of electric charge, and the outside world and capacitance component closed loop (not including power supply in general closed loop), capacitance poles within the closed loop to force himself to electrostatic balance form electric field, electric field constantly promote capacity of excess electrons (negatively charged) to the positive close to the capacitance current formation, both ends of the capacitor charge neutralization, and complete the capacitance of polarization electric field will disappear, but it is in an ideal world, closed loop in reality there is resistance, therefore on both ends of the capacitor charge neutralization has been exponentially toward zero, but not to zero.

Capacitor power failure in the electric circuit, the capacitor stored has a certain amount of voltage, there are some other load in the circuit or component is slow discharge, can also be artificially with small resistance or wires short-circuit rapid discharge (low pressure).

In theory, as long as the storage battery on both ends of the discharge, short circuit, will not damage the battery. But in practice, it is best not to exceed current C / 2.Your this 12 v7ah battery, for one, not more than 3.5 A current discharge.

Like you said on the first floor of C / 20 and 10 hr, refers to the 10 hours and 20 hours discharge rate, which is in the measurement of the discharge current, at the beginning of battery capacity in the small current discharge, measure the battery capacity is more accurate, but in practice, but impossible to use such a small current.

For example in the car or motorcycle ignition, the instantaneous discharge current is very big, but will not so damaged the battery.

In theory, as long as both ends of battery discharge, short circuit, will not damage the battery. But in practice, it is best not to exceed current C / 2.Your this 12 v7ah battery, for one, not more than 3.5 A current discharge.

Like you said on the first floor of C / 20 and 10 hr, refers to the 10 hours and 20 hours discharge rate, which is in the measurement of the discharge current, at the beginning of battery capacity in the small current discharge, measure the battery capacity is more accurate, but in practice, but impossible to use such a small current.

For example in the car or motorcycle ignition, the instantaneous discharge current is very big, but will not so damaged the battery.

Battery editor

The commonly used rechargeable batteries in addition, the lithium battery, lead battery is also very important to a battery system. The advantage of lead battery is discharging electromotive force is stable, the disadvantage is that is smaller than energy (energy storage unit weight), strong corrosion to the environment. The working voltage of lead-acid batteries flat, wide range of temperature and current, can charge and discharge hundreds of circulation, and storage performance is good, especially suitable for dry charged storage), low cost, thus widely used.

Lead battery (Lead - acid battery) : the size and weight have not been able to obtain effective improvement, so it is the most common used in automobile, motorcycle. Lead-acid batteries of the biggest improvement is newly USES efficient oxygen recombination technology to complete water regeneration, to achieve the purpose of fully enclosed does not need to add water, and "no water battery" made the life can be up to four years (single plate voltage is 2 v).

Lead-acid battery invented by plante since 1859, has been 150 years of history, technology is mature, is the world's most widely used on chemical power source. Although in recent years the nickel cadmium battery, nickel metal hydride batteries, lithium ion batteries such as battery field and application, but still lead-acid battery with large current discharge performance is strong, stable voltage characteristic, wide temperature scope, monomer battery has a large capacity, high security and the abundant raw materials and renewable utilization, low prices and a series of advantages, in the vast majority of the traditional areas and some emerging field of application of occupies a strong position.

The composition of the lead battery plate, plate, shell, electrolyte, lead connection bar, column, etc.

1.Positive and negative plates

Classification and composition: positive plate and negative plate plate cent two kinds of, all by grid frame of active material and filling on top of it.

The principle diagram of the lead-acid batteries

The principle diagram of the lead-acid batteries

Role: the battery charge and discharge process, the energy and chemical energy transformation, is relying on the plate on the active material and electrolyte in the chemical reaction of sulfuric acid.

Color to distinguish: positive plate of the active material is lead dioxide (PbO2), dark brown; Active substance on the negative plate is spongy pure lead (Pb), a pewter.

Fence effect: contain active substances and the plate forming.

Plate group: to increase the capacity of the battery, will be more positive and negative plates respectively parallel welding, composed of positive and negative plate group.

Installation of special requirements: when the positive and negative plates chimeric mutually, insert plate in the middle. In each of the monomer battery, the number of negative plate total more than positive plate.

2.partition

Role: in order to decrease the size of battery internal resistance and, inside the battery positive and negative plates should be kept as near as; In order to avoid contact with each other and short circuit, will be separated with partition between positive and negative plates.

Material requirements: clapboard materials should have the porosity and permeability, and chemical performance is stable, which has good resistance to acid and oxidation resistance.

Material: common diaphragm material with wooden partition, microporous rubber, microcellular plastics, glass fiber and cardboard, etc.

Installation requirements: when the diaphragm on one side should be geared to the needs of positive plate with grooves.

3.shell

Function: for electrolyte and plate group

Material: by acid, heat resistant, shock resistance, good insulation, and has certain mechanical properties of materials.

Internal structure features: shell for monolithic structure, shell by partition separated into three or six without feeling the single, have raised rib to put in the plate at the bottom of the group. Rib off between the space used to store the active substances, in order to prevent the cause short circuit between the polar plate, plate into the shell, the upper with the same as the shell material of battery cover seal. On the battery cover corresponding to every single case at the top of the have a charging hole, used to add electrolyte and distilled water, can also be used to check the electrolyte level and the electrolytic liquid of density measurement.

4.The electrolyte

Role: electrolyte in electric energy and chemical energy conversion process of charging and discharging electrochemical reaction between ion conductive role and participate in chemical reactions.

Ingredients: it is composed of pure sulfuric acid and distilled water according to certain proportion, and the density is generally 1.24 ~ 1.30 g/ml.

Special attention: the purity of electrolyte is the important factors that affect the performance and service life of battery.

5.Monomer battery concatenated way

Battery is generally consists of three or six monomer battery series, rated voltage of 6 v or 12 v respectively.

Concatenated way: monomer battery mode of concatenated usually have the traditional exposed, wear a wall and three ways by leaps and bounds.

This way of connection process is simple, but the lead consumption is much, connection resistance is big, so when the starting voltage drop and power loss is big, and easy to cause short circuit.

Wear wall connection mode: it is punched on the partition between adjacent monomer battery for article connection through the two monomer battery plate group very column welded together.

Leapfrog connection mode: the partition between adjacent monomer battery with above gouges where whole pieces were missing, article connection through the gouges where whole pieces were missing across partition two monomer battery plate group column connected, article all connections are arranged under the overall cap.

Wear wall and leap-forward connection mode compared with the traditional article exposed connection lead connection, a connection distance is short, saving material, small resistance, starting performance is good wait for an advantage.

The page contains the contents of the machine translation.