1. Aluminum alloy and temper
Aluminum Alloy | Temper |
1080 1070 1235 1060 | H18 |
Compared with the aluminum foil with one side shiny, the 1080 aluminum foil with both sides shiny can significantly improve the consistency of aluminum foil.
3. Excellent consistency of thickness and density
Thickness | Thickness Tolerance | Density | Density Tolerance |
15µm | ±0.3µm | 40.5g/m2 | ±0.85g/m2 |
The consistency of the thickness and density of aluminum foil and battery is controlled within ± 2%, which is significantly lower than the tolerance range of ordinary aluminum foil of ± 5%, which greatly improves the performance of battery foil.
4.Large surface tension
The surface tension of battery aluminum foil is greater than 32 dynes, and the general surface tension of aluminum foil is 29 dynes, which is conducive to improving the bonding performance of the pole piece.
5.Large surface tension
The surface tension of special aluminum foil is greater than 32 dynes, and the general surface tension of aluminum foil is 29 dynes, which is conducive to improving the bonding performance of the pole piece.
6.Tensile strength
The tensile strength of 15µm battery aluminum foil is 200-210Mpa to ensure the processing performance of the foil.
7.Strong elongation
The elongation rate of 15µm aluminum foil battery is 1.5% -4.0%, which guarantees the mechanical properties of aluminum foil.
The advantage of aluminum foil for battery:
It significantly extend the service life of lithium ion batteries
Test condition: 503759-1300mAh, voltage range: 3.0-4.2V, charge and discharge current: 1C / 1C, test temperature: 25 ± 3 ℃
Because of the good physical properties of battery and aluminum foil, he cycle performance of the battery has been significantly improved.
2. It greatly improve consistency of the internal resistance
The following figure is the internal resistance distribution of 18650-2600mAh batteries using battery aluminum foil and ordinary aluminum foil.
It can be seen from the above data that the use of aluminum foil battery can not only reduce the internal resistance, but also improve the consistency of the internal resistance.
3. It can improve the discharge performance of the battery
After using battery aluminum foil, the rate performance of the battery is significantly improved, especially in the case of large rate (greater than 3C) that the rate discharge capacity is increased by more than 15%, or under the same rate, battery grade aluminium foil can increase the energy density of the battery.