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What are the Factors That Affect the Current Carrying Capacity of the High Current Probe?

source:Industry News release time:2021-05-13 Article author:sznbone Popular:POGO PIN

  The high-current test probe includes a sleeve, a needle bar, a current test head, a voltage probe, a first elastic part and a positioning part. When the battery is pressed by the high current test probe, the needle bar, current test head, and voltage probe will rotate the battery at the same time, acting like a drill bit to drill out the oxide layer covering the surface of the battery to reduce contact Impedance makes the measured current and voltage parameters more accurate.

What are the Factors That Affect the Current Carrying Capacity of the High Current Probe?(图1)

  In addition to some external factors that will cause the current carrying capacity of the probe to decrease in a specific environment, high current probes can determine the carrying capacity of the probe, and more importantly, the internal factors of the probe, which mainly depend on the following points:

  1. The thermal conductivity of the insulating layer

  In addition to preventing electric shock, the function of the insulating layer is flame retardant, which is as important as preventing electric shock. The better the thermal conductivity of the insulating material, the better the flame retardancy. Therefore, the quality of the insulating material determines the current carrying capacity of the probe from another aspect.

  2. Material conductivity

  This mainly depends on the conductor material, such as common copper wire and aluminum wire. The conductivity of copper is at least 30% higher than that of aluminum. And when necessary, there may be silver lines. In addition to the substance of the material, it also depends on the purity of the material. For example, the copper material, the highest purity red copper, has a much higher conductivity than the next-class brass.

  3. The area of the probe core

  This is what we often say "wire diameter", such as 2.5 square millimeters, 4 square millimeters, etc., which are common in decoration, refer to wire diameters. It's just emphasized here that what determines the current carrying capacity is not the cross-sectional area of the entire wire, but the cross-sectional area of the conductor in this wire. The thicker the line, the greater the current carrying capacity.


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