Electric vehicle and energy storage system with the rapid development of other fields, lithium battery, as the main source of power and energy storage, has attracted much attention for its safety and reliability. Among them, lithium battery pack frame structure design, including cell, battery pack and safety system, is very important to ensure the safety and reliability of lithium batteries. This article will discuss the frame structure design of modern lithium battery pack from these three aspects.

1. Cell Design

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

(1) Cell material selection: select high quality positive and negative electrode materials to ensure that cell has high energy density and cycle life.

(2) sealing design: ensure cell sealing, prevent electrolyte leakage and reduce potential safety hazards.

(3) heat dissipation design: through reasonable heat dissipation design, reduce the working temperature by cell and prolong the battery life.

(4) cost and volume control: on the premise of ensuring performance and safety, reduce the cost and volume by cell as much as possible and improve the energy density.

2. Battery pack design

the battery pack is composed of multiple cell, and its design needs to consider cell arrangement, connection mode, heat dissipation system and other factors to ensure the safe and reliable operation of the entire battery pack.

(1) arrangement of cell: reasonable arrangement of cell can make full use of space and improve the energy density of battery pack.

(2) connection mode: adopt reliable cell connection mode to ensure stable internal connection of battery pack and reduce potential safety hazards caused by connection failure.

(3) heat dissipation system: design an effective battery pack heat dissipation system to reduce the working temperature of the battery pack and prolong the battery life.

(4) battery management system (BMS): Integrated battery management system to monitor and manage the battery pack in real time to ensure the safety and reliability of the battery pack.

3. Security System design

safety System is an indispensable part of lithium battery pack frame structure design. The design should fully consider the following aspects:

(1) overcharge and overdischarge protection: the safety system should have the functions of overcharge and overdischarge protection to avoid battery damage or safety accidents.

(2) short circuit protection: the safety system should prevent and protect the short circuit situation to reduce the safety problems caused by short circuit.

(3) temperature monitoring: The safety system should have the functions of temperature monitoring and control, timely detect abnormal temperature conditions, and ensure the safe operation of the battery.

(4) external physical protection: Design external physical protection structure to effectively prevent battery damage caused by external collision.

Lithium battery pack frame structure design needs to comprehensively consider the design of cell, battery pack and safety system to ensure the safety and reliability of the battery. In the future, with the continuous progress of technology and the continuous improvement of standards, the frame structure design of lithium battery pack will pay more attention to safety and reliability, and in electric vehicles, energy storage systems and other fields play an increasingly important role.