Aluminum alloy power battery casings are becoming more and more significant as new energy vehicles gain popularity. The conventional steel battery case restricts the increase in battery life since it is excessively hefty. The aluminum alloy battery case, on the other hand, is the recommended material since it is lightweight (19 kg) and has good sprayability and weldability.
Why choose GNEE
The British Standards Institution (BSI) inspected GNEE Aluminum's compliance with the automotive IATF16949 standard, which provides quality compliance for consistently growing the market for automotive products and attaining high-quality development.
With its comprehensive suite of cutting-edge tools for new energy vehicle research and development, testing, and analysis, GNEE ensures the effectiveness of new product development and speeds up the advancement of scientific and technological accomplishments. Additionally, by saving time and money in the creation and promotion of new products, our R&D, innovation, and verification capabilities can help businesses become more competitive.
Specification of aluminum plate for power battery shells
| Alloy | Temper | Size specification/mm | Application | |||
| Thickness | Type | Width | length | |||
| 1050 | O H12 H14 | 0.60-1.60 | plate | 100.0-2000.0 | 1000-3000 | power battery shells |
| strip | - | |||||
| 3003 | O H12 H14 | 0.60-3.00 | plate | 100.0-2000.0 | 1000-3000 | |
| strip | - | |||||
| 3005 | O | 0.60-2.00 | plate | 100.0-2000.0 | 1000-3000 | |
| strip | - | |||||
Chemical composition of aluminum plate for power battery shells
| Alloy | 1050 | 3003 | 3005 |
| Si | 0.25 | 0.60 | 0.60 |
| Fe | 0.40 | 0.70 | 0.70 |
| Cu | 0.05 | 0.05-0.20 | 0.30 |
| Mn | 0.05 | 1.0-1.5 | 1.0-1.5 |
| Mg | 0.05 | -- | 0.2-0.6 |
| Cr | -- | -- | 0.10 |
| Ni | -- | -- | -- |
| Zn | 0.05 | 0.10 | 0.25 |
| Ti | 0.03 | -- | 0.10 |
| Al | Remainder | ||
Deviation requirements for aluminum plates used for power battery shells
| Thickness/mm | Allowable deviation/mm |
| 0.60-2.00 | ±0.02 |
| >2.00-3.00 | ±0.03 |
| >3.00-4.00 | ±0.04 |
| Width/mm | Allowable deviation/mm |
| 500.0 | ±0.5 |
| >500.0-2000.0 | ±1.5 |
Longitudinal tensile mechanical properties of aluminum plates for power battery shells at room temperature
| Alloy | Temper | Thickness/mm | Tensile strength/MPa | Specified non-proportional tensile strength /MPa | Elongation after break /% |
| 1050 | O | 0.60-1.50 | 60-90 | ≥20 | ≥30 |
| >1.50-1.60 | ≥35 | ||||
| H12 | 0.60-1.50 | 80-110 | ≥65 | ≥6 | |
| >1.50-1.60 | ≥8 | ||||
| H14 | 0.60-1.50 | 95-120 | 75 | ≥4 | |
| >1.50-1.60 | ≥5 | ||||
| 3003 | 0.60-1.50 | 100-130 | ≥40 | ≥25 | |
| >1.50-3.00 | ≥30 | ||||
| H12 | 0.60-1.50 | 125-155 | ≥90 | ≥5 | |
| >1.50-3.00 | ≥7 | ||||
| H14 | 0.60-1.50 | 140-175 | ≥125 | ≥4 | |
| >1.50-3.00 | 6 | ||||
| H118 | 1.00-1.50 | ≥185 | ≥165 | ≥2 | |
| >1.50-4.00 | ≥3 | ||||
| 3005 | O | 0.60-1.50 | 115-165 | ≥45 | ≥18 |
| >1.50-2.00 | ≥20 |
Laser welding performance of aluminum plate for power battery shell
| Alloy | Temper | Crackle | Abnormal weld pool occurrence ratea | Stomata | Spatter |
| 1050 1060 3003 | O H12 H14 H18 | - | ≤3% | - | Allow slight |
| 3005 | O | - | ≤5% | - | Allow a small amount |
3003 3005 aluminum coil characteristics for power battery shell
Lightweight: Aluminum alloy has a strong strength-to-weight ratio and is comparatively light when compared to other metal alloys. This can lower the weight of the entire battery system and increase the cruising range and energy efficiency of electric vehicles.
High strength: The aluminum alloy is strong enough to offer strong structural support, withstand impact, and shield the battery module from vibration and shock from the outside world.
Good thermal conductivity: The aluminum alloy's exceptional thermal conductivity allows it to efficiently transfer heat produced inside the battery, increase its capacity to dissipate heat, and maintain a steady temperature.
Strong plasticity: Aluminum alloy is easily formed and processed into complicated shapes, making it a strong choice for battery case manufacture with a variety of design specifications.
Recyclability: Batteries' environmental friendliness and sustainability are enhanced by the recyclable nature of aluminum alloys.
3003 3005 aluminum coil surface treatment for power battery shell
Powder electrostatic spraying, plasma-enhanced electrochemical surface ceramization, electrophoretic painting, and frosting are the four main methods used to surface treat aluminum shells for modern energy batteries.
Electrostatic powder spraying: spray negatively charged powder onto the power battery's aluminum casing using an electrostatic powder spray gun. The powder will then heat, melt, and solidify to create a film. Good corrosion resistance as well as resistance to acid, alkali, and salt spray can be obtained using this method.
Electrophoretic painting is a coating technique that uses an external electric field to direct pigments and resin particles suspended in electrophoretic fluid to migrate and deposit on the power battery's metal shell. The aluminum shell's surface has a gentle sheen following electrophoretic painting, which helps it withstand acid rain and cement and mortar degradation.
By creating a ceramic layer on the aluminum shell's surface, plasma-enhanced electrochemical surface ceramization is a technique that enhances performance. Although the cost is somewhat exorbitant, this method may create a wide range of hues and has a nice decorative effect.
Sanding procedure: to create a lovely sanding effect on the aluminum shell's surface, use a chemical sanding agent to the surface. This technique works well for thin or tiny sections of aluminum casings and yields the same sand finish as mechanical sandblasting.
Application of electric vehicle power battery shell
Power battery case inner lining plate: 1050 aluminum coil plates for power battery shells can be used to create lining plates inside the power battery shell. These plates have conductivity, which aids in current distribution and transmission, and support and protection purposes.
Power battery shell: 3003 Power battery shells are frequently made from aluminum coil plates, which are strong and resistant to corrosion, may offer protection and structural support, and can continue to operate steadily even in challenging conditions.
Housing for the power battery: 3005 Aluminum coil plates, which exhibit strong corrosion resistance and antioxidant properties, are frequently utilized in the production of power battery shells. They can successfully stop corrosion and environmental damage to the battery shell while safeguarding the stability and safety of the battery's interior components and structure.
