Lead the technical innovation of battery connection copper strip
2026 Apr 27
With the rapid development of new energy automobile industry in the direction of high energy density, ultra-fast charging and extreme safety, the connection system as the "blood" and "nerve" of battery pack is facing unprecedented technical challenges. The copper strip used for battery connector has been upgraded from a simple conductive component to a key material that affects the performance, life and safety of the whole battery pack. Jiangxi Jinpin Copper Co., Ltd., with its forward-looking technical layout and rigorous manufacturing philosophy, is actively responding to this trend and providing high-performance copper strip solutions for the industry.
1. Core technical requirements: comprehensive performance matrix beyond basic conductivity.
At present, a qualified battery connecting copper strip must meet a complex performance matrix, and its technical requirements are far beyond the reach of traditional copper materials.
Ultra-high strength and excellent softening resistance
Requirements: In order to prevent the connection from loosening due to stress relaxation when the vehicle vibrates for a long time and is heated by charging and discharging (the working environment can reach 120-150℃), the copper strip must have both ultra-high strength (the tensile strength is often above 400MPa) and excellent softening resistance (for example, the strength retention rate at 150℃/1000 hours is ≥90%).
Value: Ensure the contact pressure of the connection point of the battery pack is stable in the whole life cycle, and avoid the risk of local overheating, energy loss and even thermal runaway caused by the increase of contact resistance.
High conductivity and good compromise balance
Requirements: While pursuing strength, the electrical conductivity must be kept as high as possible (usually ≥80% IACS). This poses an extreme challenge to the composition design and process control of materials, and it is necessary to find the best balance between strength and conductivity.
1. Core technical requirements: comprehensive performance matrix beyond basic conductivity.
At present, a qualified battery connecting copper strip must meet a complex performance matrix, and its technical requirements are far beyond the reach of traditional copper materials.
Ultra-high strength and excellent softening resistance
Requirements: In order to prevent the connection from loosening due to stress relaxation when the vehicle vibrates for a long time and is heated by charging and discharging (the working environment can reach 120-150℃), the copper strip must have both ultra-high strength (the tensile strength is often above 400MPa) and excellent softening resistance (for example, the strength retention rate at 150℃/1000 hours is ≥90%).
Value: Ensure the contact pressure of the connection point of the battery pack is stable in the whole life cycle, and avoid the risk of local overheating, energy loss and even thermal runaway caused by the increase of contact resistance.
High conductivity and good compromise balance
Requirements: While pursuing strength, the electrical conductivity must be kept as high as possible (usually ≥80% IACS). This poses an extreme challenge to the composition design and process control of materials, and it is necessary to find the best balance between strength and conductivity.
