Mining lead-acid storage battery high-frequency intelligent rapid-charging charger

Abstract

The invention relates to the field of chargers, and specifically relates to a mining lead-acid storage battery high-frequency intelligent rapid-charging charger. The charger comprises a master control system, a first control system, a second control system, a third control system, a PWM rectifier, a bidirectional DC / DC converter, a bidirectional H-bridge inverter I, a bidirectional H-bridge inverter II, and a high-frequency transformer. The beneficial effects of the charger are that by employing high frequency and full digitalization technologies, functions of charging and discharging are realized, various charging methods can be more effectively realized with the combination of charging and discharging, rapid charging and rapid discharging of the lead-acid storage batteries can be realized, the charger is automatically compatible with two input voltage grades of AC380 / 660V, intelligent charging of storage batteries with all specifications can be realized, the service lifetime of the storage batteries is prolonged, the usage frequency of the storage batteries is improved, the discharging function is provided, the energy waste is avoided, energy saving and environmental protection are realized, the explosion-proof performance and the usage safety performance of the whole product are enhanced, and the practicality is high.

Description

technical field [0001] The invention relates to the field of chargers, in particular to a high-frequency intelligent fast-charging charger for a mine-used lead-acid storage battery. Background technique [0002] To charge lead-acid batteries in coal mines, it is necessary to adopt different charging methods according to the voltage level, capacity, and condition (newness) of the lead-acid batteries; it is also necessary to improve the service life of lead-acid batteries in coal mines, improve the efficiency of coal mine charging operations and Use fast charging technology. According to the actual application background of coal mines, in general, high-frequency smart chargers for mine-used lead-acid batteries should have the following requirements: (1) The capacity of the charger should not be less than 55kW, the maximum charging current should be 120A, and 0-120A continuous Adjustable output; (2) To be able to charge batteries of all specifications, the charging voltage out...

AI Technical Summary

Problems solved by technology

The prominent problems of this system are: first, the charging voltage fluctuates greatly, which will damage the battery; second, it is large in size and heavy in weight, and the flameproof shell is heavy (over 750 kg); third, the charging mode is rough and cannot be fully realized Intelligent charging can easily lead to excessive charging current, serious overheating of the battery, aging and deformation of the plates, etc., resulting in a greatly shortened battery life; fourth, the charging condition that the charging current and battery voltage are self-adaptive cannot be realized; fifth, it cannot be realized Discharge and fast charging technology for the battery; 6. It cannot automatically adapt to the two input voltages of AC380V / AC660, and adapts by changing the wiring mode of the primary winding of the power input transformer.

[0004] The second charging method, such as figure 2 and image 3 As shown, what is used is uncontrolled rectification-H-bridge inverter-high-frequency transformer-fast rectified lead-acid storage battery high-frequency intelligent charging system or uncontrollable rectification-chopper-H-bridge inverter ——High-frequency transformer—a high-frequency intelligent charging system for fast-rectified lead-acid batteries. The continuous adjustment between DC 0V~DC550V cannot take into account; secondly, when the power supply grid fluctuates greatly, it is difficult to continuously adjust the output charging voltage between DC 0V~DC550V; thirdly, it is impossible to quickly discharge the battery; Fourth, it is difficult to achieve fast charging; therefore, it is very meaningful to study high-frequency intelligent fast charging chargers for mine-used lead-acid batteries

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