● lead acid battery charging, the positive plate is lead dioxide (PbO2) in sulfuric acid solution under the action of water molecules, a small quantity of lead dioxide and water generates dissociation of unstable substances – lead hydroxide (Pb (OH) 4), hydroxide ions in solution, ions lead (Pb) remain in the positive plate, so the lack of positive results on the electronic board. .

● lead acid Dell FK890 battery charging, the negative plates of lead (Pb), and the electrolyte of sulfuric acid (H2SO4) react to become lead ions (Pb 2), transfer of lead ions to

Electrolyte, the cathode board leaving excess

Both e-(2e).

● Thus, even when not connected to external circuit (battery

Open), due to a chemical reaction, positive plate

On the lack of electronics, a very fu on the electronic board redundant

As seen on the right, the bipolar plate, seen rising

A certain potential difference, which is battery

Momentum.

2, lead acid batteries during discharge of the electro-chemical reaction

● Lead acid batteries discharge when the potential difference in the hp Pavilion dv6 battery under the influence of a negative amount on board electronic form through the load in the positive plate current I. At the same time a chemical reaction in the battery.

● Each negative plate of lead atoms emit two electronics, the generation of lead ions (Pb 2) and the electrolyte in the sulfate ion (SO4 ֿ ²) reaction in a very on-board generation Lead insoluble in sulfuric acid (PbSO 4).

● positive plate of lead ions (Pb 4) obtained from the negative of the two electrons (2e), the lead ions in divalent (Pb 2) and the electrolyte in the sulfate ion (SO4 ֿ ²) reaction in the very edge to generate insoluble lead sulfate (PbSO 4). Hydrolysis of a positive plate of oxygen ions (O ֿ ²) electrolyte and hydrogen ion (H) reaction to form a stable material and water.

● electrolyte exist in sulfate ions and hydrogen ions in the evolution of the electric field under the action of the battery positive and negative, respectively, formed within the battery current, the formation of the whole loop , batteries continue to discharge outdoors.

● landfill reducing the concentration of H2SO4 is sulfuric acid on lead electrode negative (PbSO 4) increased resistance increased internal toshiba PA3591U-1BRS battery (non-conductive lead sulfate), concentration of electrolyte decreased the battery EMF reduction .

● chemical reaction equation is:

Cathode active material cathode material anode electrolyte active negative result resultant resultant electrolyte

↓ ↓ ↓ ↓ ↓ ↓

PbO2 2H2SO4 Pb → PbSO 4 2H2O PbSO4

Lead oxide sulfate sulfuric acid Lead acid Lead

3, the lead acid battery charging process of electro-chemical reaction

● prosecution should have run off in the external power supply (charging rectifiers or pole) so that positive and negative plates in the discharge of substances released after restoring the original active substance, and the power of the outside world storage of chemical energy.

● In the positive plate in the current role of the outside world under the lead sulfate is dissociated in divalent lead ions (Pb 2) and sulfate anion (SO4-2) external power supply due to continuous positive lessons electronics then the positive plate in the vicinity of free divalent lead ions (Pb 2) continue to release two electrons added by tetravalent lead apple PowerBook G4 15 inch battery ions (Pb 4), and with water to continue to meet and, ultimately, the board has generated a very positive lead dioxide (PbO2).

● In the negative, the current role of the outside world under the lead sulfate is dissociated in divalent lead ions (Pb 2) and sulfate anion (SO4 ~ ²), because of the constant access to negative power electronics from the outside, then the negative near the free divalent lead ions (Pb 2) has been in and lead (Pb), and velvets, as wireless is set to negative.

● electrolyte, cathode continuous generation of hydrogen ions (H) and sulphate (SO4 ~ ²), produced a constant negative sulfate ions (SO4 ~ ²), under the influence of the electric field, hydrogen ions move to cathode, sulfuric acid ions move toward the cathode to form a current.

● late charge under the influence of the external current solution in the reaction of water electrolysis will occur.

● chemical reaction equation is:

Material of cathode and anode and cathode electrolyte electrolytes resulting resulting resulting negative

PbSO4 2H2O → PbSO 4 Pb PbO2 2H2SO4

Lead sulphate, lead sulphate lead sulphate lead oxide

4, after loading / unloading lead-acid electrolyte in the battery changes

● From the above we can see that discharge lead acid batteries, the electrolyte of sulfuric acid in steady decline in water gradually increased, the solution has decreased.

● From the above we can see that the lead-acid battery charging, increasing the electrolyte of sulfuric acid, water, decreased the proportion of increase of the solution.

● practical work, you can change depending on the proportion of electrolyte to determine the extent of lead-acid battery charging ..