Technical points of automotive battery cables

With the implementation of various policies such as energy conservation and emission reduction, the market demand for energy has further changed, and the energy storage industry will move forward with greater impetus. Promoting the development of the energy storage industry is an inevitable choice for the dual carbon goals.

Energy storage converts electrical energy into other forms of energy and stores them in energy storage devices. The main forms of energy storage include physical energy storage, electrochemical energy storage and other energy storage. Energy storage is mainly used for grid transmission and distribution and auxiliary services, grid connection of renewable energy sources such as photovoltaic and solar energy, distributed microgrids and user side.

The energy storage system realizes the charging and discharging of electric energy through the energy storage inverter. The energy storage system has high DC voltage, high power, and a large number of batteries. It suffers from serious electromagnetic interference and is complicated to control. In order to ensure the integrity of energy storage system signals, reduce environmental interference, and reduce safety hazards, the development and design of the entire energy storage system cable needs to consider the mutual coupling and shielding structure design of signals.

The wiring space of energy storage cables in energy storage applications is small, and the cables are required to be flexible enough and have a small bending radius to adapt to the wiring requirements. In order to ensure good flame retardancy, the cable needs to pass a single flame retardant test; a thermal life experiment is set up to ensure that the cable meets long life requirements; due to the particularity of the application environment, it needs to be resistant to battery acid and battery electrolyte; especially for outdoor use Energy storage cables have stricter requirements against UV and salt spray. In addition, energy storage cables must also meet low-smoke, halogen-free, and flame-retardant requirements.

Common materials for energy storage cables include PVC, XLPE, and silicone rubber. Common temperature levels are 90°C, 125°C, and 150°C, and the rated voltage is DC 1000V/1500V.

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