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With the rapid development of electric vehicles, energy storage systems, and other fields, lithium batteries, as the main source of power and energy storage, have attracted much attention for their safety and reliability. Among them, the structural design of the lithium battery pack frame, including the battery cells, battery pack, and safety system, is crucial for ensuring the safety and reliability of lithium batteries. This article will explore the frame structure design of modern lithium battery packs from these three aspects.

1、 Cell design

The battery cell is the core component of a lithium battery pack, and its design directly affects the performance, lifespan, and safety of the battery. In battery cell design, the following aspects need to be considered:

1) Material selection for battery cells: Choose high-quality positive and negative electrode materials to ensure that the battery cells have high energy density and cycle life.

2) Sealing design: Ensure the sealing of the battery cell, prevent electrolyte leakage, and reduce safety hazards.

3) Heat dissipation design: Through reasonable heat dissipation design, the operating temperature of the battery cell is reduced, and the battery life is extended.

4) Cost and volume control: Minimize the cost and volume of battery cells while ensuring performance and safety, and increase energy density.

2、 Battery pack design

A battery pack is composed of multiple battery cells, and its design needs to consider factors such as cell arrangement, connection method, and heat dissipation system to ensure the safe and reliable operation of the entire battery pack.

1) Cell arrangement: A reasonable arrangement of cells can fully utilize space and improve the energy density of the battery pack.

2) Connection method: Reliable cell connection method is adopted to ensure stable internal connection of the battery pack and reduce safety hazards caused by connection failures.

3) Cooling system: Design an effective battery pack cooling system to reduce the working temperature of the battery pack and extend its lifespan.

4) Battery Management System (BMS): An integrated battery management system that provides real-time monitoring and management of battery packs, ensuring their safety and reliability.

3、 Security system design

The safety system is an indispensable part of the structural design of lithium battery pack frames. Its design should fully consider the following aspects:

1) Overcharge and over discharge protection: The safety system should have overcharge and over discharge protection functions to avoid battery damage or safety accidents.

2) Short circuit protection: The safety system should prevent and protect against short circuits, reducing safety issues caused by short circuits.

3) Temperature monitoring: The safety system should have temperature monitoring and control functions to promptly detect abnormal temperature conditions and ensure the safe operation of the battery.

4) External physical protection: Design an external physical protection structure to effectively prevent battery damage caused by external collisions.

The structural design of lithium battery pack frame needs to comprehensively consider the design of battery cells, battery packs, and safety systems to ensure the safety and reliability of the battery. In the future, with the continuous advancement of technology and the continuous improvement of standards, the frame structure design of lithium battery packs will pay more attention to safety and reliability, and play an increasingly important role in fields such as electric vehicles and energy storage systems.

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