Feed-back type capacity check discharge device for storage battery and application method of said device

Abstract

The invention belongs to a field of mechanical structures and more specifically relates to a feed-back type capacity check discharge device for storage battery and an application method of said device. The feed-back type capacity check discharge device includes the storage battery, a DC chopping module and a rectification inversion module electrically connected in sequence. The capacity check discharge device includes a monitoring management module used for performing current and voltage monitoring on the device. The monitoring management module is connected with the storage battery, the DC chopping module and the rectification inversion module electrically. The capacity check discharge device is provided with a three-phase power source used for charging. The three-phase power source is connected with the rectification inversion module electrically. The capacity check discharge device includes a load connected with the storage battery and the rectification inversion module. According to the invention, through the arrangement of an energy feedback power grid, environment protection and energy conservation are achieved. At the same time, the device can automatically enable a single body that is unqualified in capacity check to be in short circuit and performs field activation on the storage battery that fails in capacity check discharge, so that the service life of the storage battery is prolonged, the maintenance cost is reduced and the safe operation of a power system is ensured.

Description

technical field [0001] The invention belongs to the field of mechanical structures, and more specifically relates to an application method of a core capacity discharge device for a regenerative storage battery pack. Background technique [0002] The battery pack in normal operation is generally in the state of floating charge. Long-term floating charge will change the internal substances and even cause vulcanization, which will lead to the decline of the capacity and activation of the battery pack. [0003] According to the relevant regulations and specifications of the power grid battery pack, the DC battery packs that have been in operation for more than 5 years need to conduct a nuclear capacity discharge test every year, and the DC battery packs that are less than 5 years old need to conduct a nuclear capacity discharge test every 2 years. Discharging with a current of 0.1C usually takes 10 hours to discharge. If the capacity or voltage of one of the battery cells reache...

AI Technical Summary

Problems solved by technology

The current nuclear capacity discharge mostly adopts the resistance energy consumption method, which is not environmentally friendly and energy-saving; at the same time, if the voltage of a single cell or the capacity of a single cell reaches the unqualified threshold during the nuclear capacity discharge process, the tester needs to short-circuit the cell While continuing to discharge, this method requires testers to be on site all the time, which is time-consuming and laborious

There are also some offline methods. If the system breaks down and the capacity of a set of battery packs cannot meet the requirements, the battery packs that cannot be put into the nuclear capacity discharge test in time will expand the scope of the accident and may cause serious electrical incidents.

In addition, the unqualified core capacity of the battery pack may be due to the decline in the activation performance of the vulcanized conductor, and the nuclear capacity discharge instrument does not have the function of in-situ activation.

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