Testing device and method for battery electrolyte of urban rail train

Abstract

The invention discloses a testing device for a battery electrolyte of an urban rail train and relates to the technical field of battery testing. The testing device comprises a processor module, a touch display screen, a reference voltage source circuit, a current sampling circuit, an adjustable voltage source follower circuit and a USB (Universal Serial Bus) communication module. The invention further discloses a testing method for the battery electrolyte of the urban rail train. The method comprises the steps of applying adjustable constant voltage of 0 to 2V between electrical-conduction pole plates (A, B and C) and an electrical-conduction pole plate D among four electrode types placing inside the battery electrolyte, acquiring voltage generated on the electrical-conduction pole plate D through a high-precision ADC acquiring and amplifying circuit, carrying out data processing by a processor so as to figure out the electrical conductance of electrical-conduction electrodes in the specific solution, and reflecting the current conducting capacity of the solution, i.e., solution electric conductivity. According to the device and the method, the accuracy of measurement is high, the influence caused by polarizing of the electrodes is avoided, and the subtle change of concentration of the electrolyte can be accurately measured, so that train failure caused by performance reduction of storage batteries is lowered.

Description

technical field [0001] The invention relates to the technical field of battery detection, in particular to a device for testing battery solution of urban rail trains and a method for testing battery solution of urban rail trains. Background technique [0002] At present, in the electrical system design of urban rail vehicles, the determination of the parameters of the battery pack and the design of the battery box are a relatively important subsystem in the electrical system. In the special operation mode of the subway vehicle, as an emergency load power supply, it mainly completes the following functions: the subway vehicle activates each control system before the train starts during operation, and at the same time provides control power for the auxiliary inverter. When there is no grid voltage on the line grid or the auxiliary inverter with charger fails to work, the battery is used for the emergency lighting on the vehicle, the safety-related network control system, all c...

AI Technical Summary

Problems solved by technology

[0003] Cadmium-nickel alkaline batteries are mostly used in subway vehicles now. Although cadmium-nickel alkaline batteries have many advantages, they often encounter electrolyte overflow during charging during daily maintenance, resulting in a large difference in the electrical energy of the entire battery pack. Electrical insulation performance As a result, the power of the whole group of batteries can not only be released but also cannot be charged, and due to the long-term floating charge state, it is difficult to ensure that its temperature is within an appropriate range, and the electrolyte will dry up, the active material will fall off, the plate will be deformed, and the grid plate will be damaged. Corrosion and vulcanization, etc., will affect the sulfuric acid saturation inside the battery, resulting in a reduction in battery capacity or even failure, affecting the stability of train operation, and posing a major safety hazard

[0004] During the operation and maintenance of the battery, some problems are often overlooked, resulting in insufficient operation and maintenance. Even in daily use, the battery pack is regularly maintained, but with the long-term use of the battery pack, the performance of all aspects is gradually declining. Especially when the external power supply of the vehicle disappears, the battery pack voltage drops rapidly and then rises to maintain a constant voltage output at the moment when the battery pack is immediately put into use with load. At this time, the sudden change in the battery pack voltage will also bring great danger

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