Technical points of automotive battery cables

China [CN]

With the implementation of various policies such as energy conservation and emission reduction, the market demand for energy has further changed. The energy storage industry will move forward with greater momentum. 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 it 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 such as photovoltaics and solar energy, distributed microgrids and user side.

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

The wiring space of energy storage cables in energy storage applications is small, and the cable is required to be soft enough and have a small bending radius to meet the wiring requirements. To ensure good flame retardancy, the cable needs to pass a single flame retardant test; set up a thermal life experiment to ensure that the cable meets the long life requirements; due to the particularity of the application environment, it needs to be resistant to battery acid and battery electrolyte; especially for energy storage cables used outdoors, the requirements for UV resistance and salt spray resistance are more stringent. 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. The common temperature grades are 90℃, 125℃, and 150℃, and the rated voltage is DC 1000V/1500V.

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