KNOWLEDGE

The copper busbar plays a crucial role in electric vehicle (EV) power battery packs by facilitating the efficient distribution of electrical power among the individual cells or modules within the pack. It acts as a conductor, connecting the positive and negative terminals of the battery cells or modules to create a series or parallel arrangement, depending on the desired voltage and current characteristics of the battery pack.

Incorrectly connecting battery pack copper busbars can pose serious safety hazards and operational risks. Battery packs, especially in high-power applications like electric vehicles and energy storage systems, require proper connections to ensure safe and efficient operation. Here are some potential safety hazards that can arise from incorrect battery pack copper bar connections:

When traditional copper busbars are connected in battery packs, it is common for the wiring joints of the copper busbars to dissipate heat too slowly, resulting in line aging. This type of copper busbar has poor heat resistance. Usually, the heat dissipation effect of copper busbars is poor, and the heat dissipation is easily retained within itself, which affects the transmission efficiency of copper busbars. And in the face of some collision situations, the copper busbars cannot protect the wiring terminals. The process of immersing the copper busbars in plastic is adopted to solve this problem.

The power battery pack is a place for storing and releasing electrical energy, mainly composed of multiple power battery modules connected in series, and each module is composed of multiple individual power batteries connected in parallel to form a module. The connections between individual power batteries include square, cylindrical, flexible, and so on. The main connection scheme between battery modules is the busbar or high-voltage battery connection harness.

Energy storage systems often involve multiple types of energy, equipment, and substances, and are complex energy systems that change over time. Energy storage systems are mainly used to overcome the temporal and local differences between energy supply and demand. The energy storage battery pack is an important component of the energy storage system, and stable and reliable conductive connections are required between the energy storage batteries. Nowadays, the most common conductive connection component is powder coated hard copper busbars.

Compact battery packs typically use hard copper busbars as conductors, and their insulation is usually wrapped in heat shrink sleeves or molded or immersed in molds. However, the internal environment of electric vehicles is complex and there is also a lot of vibration, and soft copper busbars are usually used as conductive connectors. Soft copper busbars are made by laminating multiple layers of copper foil, which have good flexibility and can provide various bending and folding shapes to meet the required space. In order to meet various temperature and insulation requirements, insulation is usually replaced. Another type is FlatWire, also known as flat wire copper busbars, which are mainly used for new energy vehicle battery units and electrical components. They are suitable for charging batteries in automobiles and are also a solution to replace traditional bus connections between the main power supply and distribution equipment.