Cable for testing properties of battery pack

Abstract

The invention relates to a cable for testing properties of a battery pack, which comprises a conductive wire core and an outer insulating sheath coating the peripheral surface of the cable, wherein the conductive wire core comprises at least one pair of voltage testing wires and at least one pair of temperature testing wires, each pair comprises at least two wires, each voltage testing wire and each temperature testing wires are in the stranded wire structure formed by multiple strands of conductive wires, and each pair of the voltage testing wires and each pare of the temperature testing wires are respectively provided with an inner shielding layer coating the peripheral surface of the voltage testing wires and the temperature testing wires, as well as an inner shielding sheath coating the peripheral surface of the inner shielding layer. By adopting the cable, the number of the testing wires connected between the battery pack and a testing device is significantly reduced, not only the wiring design is simple, and wire connection is time-saving, but also the management and the error tracing are convenient, the maintenance cost is reduced, and the risk of heavy losses due to human negligence is avoided. The cable can meet the requirement of external common-mode capacitance coupled noise prevention; in addition, the inner shielding layers and outer shielding layers are arranged in the cable, thereby further inhibiting the common-mode capacitance coupled noise, reducing the external interference and improving the signal-to-noise ratio and the testing precision. The cable is also conductive to the reduction of the wire diameter of the cable.

Description

technical field [0001] The invention relates to cables, in particular to a battery pack characteristic testing cable. Background technique [0002] In the existing communication room or large-scale data computer center, the large-capacity battery backup power used when the mains power is interrupted or the rectification equipment fails is composed of multiple batteries connected in series, for example, 28 2V batteries connected in series. Since the battery is easy to age and has a limited service life, it is necessary to regularly check the records and eliminate and replace failed batteries in order to provide normal power supply when urgently needed. However, manual inspection not only consumes manpower and increases maintenance costs, but also has the risk of significant losses caused by human negligence. [0003] Most of the existing on-line monitoring systems for battery packs used as backup power sources use multi-circuit voltage testing methods to monitor the characte...

AI Technical Summary

Problems solved by technology

The number of test lines between the test equipment and the battery is huge, and it is very easy to connect wrongly. Not only is wiring and wiring troublesome and time-consuming, but it is also difficult to manage and trace errors

Some voltage test lines or temperature test lines using unshielded cables are connected in parallel. Two test cables are equivalent to two rod antennas, which will introduce the external electromagnetic field induction noise around them into the test equipment and directly affect the test. Accuracy, and the capacitance between the two test cables and the ground is a non-uniform distribution capacitance, the common mode rejection ratio is poor, so that the small-amplitude excitation AC voltage signal transmitted by the voltage test cable is susceptible to external electromagnetic noise interference; similarly, the temperature The very low frequency small voltage signal in the test cable is also susceptible to external electromagnetic noise interference

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