CN202480898U

CN202480898U - Mining electric locomotive

Info

Publication number: CN202480898U
Application number: CN2012201393644U
Authority: CN
Inventors: 周运顺; 黄启富; 黄生日; 金颖川; 周羽中; 崔先友; 徐建恒; 代泽奇
Original assignee: HUNAN ERA MINE MACHINERY MANUFACTURING CO LTD
Current assignee: HUNAN ERA MINE MACHINERY MANUFACTURING CO LTD
Priority date: 2012-04-05
Filing date: 2012-04-05
Publication date: 2012-10-10
Anticipated expiration: 2022-04-05

Abstract

The utility model discloses a mining electric locomotive which comprises a walking device and a lithium iron phosphate storage battery, wherein the lithium iron phosphate storage battery is connected with an integrated circuit which is used for guaranteeing the safe use of the lithium iron phosphate storage battery. The direct current (DC) provided by the lithium iron phosphate storage battery is output into a DC motor arranged on the walking device firstly through a protection circuit and then through a chopped wave speed controller; and the DC motor is used for driving wheels to rotate by a transmission device so as to drive to a train to travel. The lithium iron phosphate storage battery is used as a traction power source of the locomotive, has the advantages of being long in service life, high in safety, high in charge and discharge advantages, small in volume, light in weight, high in voltage of the monomer battery and stable in discharge platform. The mining electric locomotive can be used for solving the problem of potential safety hazard in the prior art, thus greatly reducing the environmental pollution and improving the power supply quality of the electric locomotive.

Description

Mining electric locomotive

Technical field

The utility model relates to the tractor equipment of mine transportation, particularly a kind of mining electric locomotive.

Background technology

Mining electric locomotive plays critical role as the dynamo-electric transportation equipment in important colliery always in the China's coal-mine development, general mining electric locomotive is divided into stringing electrical locomotive and battery locomotive two big classes.Accumulator loco motive is as electrokinetic cell by lead-acid batteries at present.China's " safety regulations in coal mine " regulation; Main return airway and exploiting field at the main belt heading of highly gassy mine air intake and gaseous mine advanced, in the return airway; Should use mine anti-explosion special type battery locomotive; Add battery locomotive have motor-driven, flexible, power supply cost is low, no spark can be explosion-proof etc. advantage, therefore, use widely obtaining in 20th century as the storage battery of electrical locomotive power.But present electric locomotive generally adopts lead-acid storage battery as power supply; There is following shortcoming in this battery: because the lead-acid storage battery energy density is low, service life is short, and the deep cycling life-span has only about 300 times; To such an extent as to need often to safeguard; Maintenance cost is high, causes electric locomotive used electrical efficiency low, and cost of transportation is higher.Waste and old lead acid accumulator reclaims difficulty, and life cycle cost is higher than ferric phosphate lithium cell, and gross pollution soil and water source, also can damage air, the ecologic balance, influences the healthy of people.Under the prior art condition, the marketing of the type electric locomotive has received certain restriction.More serious is the electrokinetic cell as mining electric locomotive, and lead-acid battery is when charging, and the electrolysis lead sulphate can be separated out hydrion, causes potential potential safety hazard.The direct current (DC) that provides of lead-acid storage battery gets into electrical motor through pinned coupler, controller, resistance box in addition; The driving motor running, electrical motor drives wheel through driving device, thus tractor-trailer train goes; Do not have protective circuit, can not guarantee the safe handling of storage battery.

The utility model content

The purpose of the utility model is to provide a kind of safety, environmental protection, the mining electric locomotive that operation cost is low.

The described mining electric locomotive of the utility model comprises running gear and storage battery, and storage battery is to the power supply of the DC machine on the running gear, and said storage battery is a lithium iron phosphate storage battery, and it is connected with the IC of a said battery of protection.

The utility model adopts the electrical source of power of lithium iron phosphate storage battery as mining electric locomotive, and ferric phosphate lithium cell is that a kind of positive electrode is the novel storage battery of LiFePO 4 (LiFePO4), and the monomer capacity is big, can accomplish 500AH even higher.Ferric phosphate lithium cell is compared with traditional lead-acid storage battery, and its characteristic and advantage are all very outstanding: 1, the life-span long, with respect to the deep cycling life-span about 300; The highest also with regard to 500 times with interior lead-acid storage battery, lithium iron phosphate dynamic battery at room temperature 1C discharges and recharges deep cycling and can reach 2000 times, capability retention is more than 80%; Be 5 times of lead-acid battery; 4 times of Ni-MH battery are 4 times of cobalt acid lithium batteries, be lithium manganate battery 4-5 doubly about; 2, safe, the binding force of phosphate radical chemical bond is stronger than traditional transition metal oxide structural chemistry key, so structure is more stable, and is difficult for release of oxygen.Ferric phosphate lithium cell stability at high temperature can reach more than 40 ℃, guaranteed the high security that battery is inherent, not can because of overcharge, temperature is too high, short circuit, bump produce blast or burning; The feature of environmental protection is superior, and ferric phosphate lithium cell is environmental protection not only, and need not add rare metal on making.LiFePO4 does not contain any (outside the lithium) heavy metal or rare metal, and nontoxic (the SGS authentication is passed through) is pollution-free, meets European RoHS regulation, is environment-friendly battery; The charge and discharge advantage is strong, and the ferric phosphate lithium cell charging rate is fast, and self-discharge is few; Memory-less effect, ferric phosphate lithium cell be electric current 2C fast charging and discharging greatly, under special charger; The 2C charging can make battery be full of 95% in 30 minutes, and starting current can reach 2C, and lead-acid battery does not have this performance now; 3, volume is little, in light weight; But commodity design lightweight, volume are 2/3 of same capability lead-acid batteries, and be also little than the Ni-MH battery volume; Weight is 1/3 of same capability lead-acid battery; About 2/3 of Ni-MH battery, such advantage makes ferric phosphate lithium cell in small size, high-capacity need of work, to play major contribution; 4, monomer battery voltage is high, and discharge platform is steady, and the battery cell nominal voltage is 3.2V; Series connection is few, and the battery pack reliability is high, can make big electric current superpower and discharge and recharge; The high-multiplying power discharge characteristic: the 10C charge discharge efficiency reaches more than 96%, and capability retention is more than 90%.

Ferric phosphate lithium cell is connected with the protective circuit that it is shielded, and can guarantee the safe handling of battery, comprises safe charge and discharge, has solved the potential safety hazard of prior art, has significantly reduced the pollution to environment, has improved the quality of power supply of electric locomotive.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is that the power output circuit of the utility model connects scheme drawing.

Fig. 3 is the scheme drawing of IC on the protective circuit plate among Fig. 2.

Fig. 4 is that the power output circuit of prior art connects scheme drawing.

The specific embodiment

Like Fig. 1, shown in Figure 2, the described electric locomotive of the utility model, it comprises lithium iron phosphate storage battery 1, bicycle frame device 2, running gear 3, protective circuit plate 4, brake equipment 5, pinned coupler 6, chopper speed regulator 7, shock absorber 8.Running gear 3 comprises DC machine 31, driving device 32 and wheel 33.The direct current (DC) that is provided by lithium iron phosphate storage battery 1 at first passes through the protective circuit on the protective circuit plate 4; Again through pinned coupler 6, chopper speed regulator 7; Get into the DC machine 31 of running gear 3; Drive DC machine 31 runnings, DC machine 31 drives wheel 33 through driving device 32 and rotates, thereby tractor-trailer train goes.Chopper speed regulator 7 is regulated the voltage at DC machine 31 two ends that are added in running gear 3, realizes the speed governing to DC machine 31, thereby regulates the moving velocity of train.The moment of torsion of DC machine 31 outputs amplifies 2 motions of drive bicycle frame device through retarder, and traction is connected the mine car group on the shock absorber 8, thereby realizes distraction procedure.

IC in the protective circuit plate 4, as shown in Figure 3, this IC can detect the voltage and current of every battery in the series battery respectively, the charge and discharge process of control battery pack.The voltage of every battery all detects voltage and crosses to put and detect between the voltage overcharging in the battery pack, and during the no short circuit phenomenon of output, the metal-oxide-semiconductor conducting, P+, P-export battery voltage, and the permission battery pack discharges and recharges operation.This circuit is mainly by li-ion cell protection special IC CONTROL IC, and charge and discharge control MOSFET etc. partly forms, and single lithium battery is connected between B+ and the B-, and battery pack is from P+ and P-output voltage.The charger output voltage is connected between P+ and the P-during charging, and B+ and the B-of electric current from P+ to the cell controls MOSFET to P-through overcharging again.In process of charging, when battery voltage surpassed 58.4V (cell 3.65V), the CO pin output signal of IC CONTROL IC turn-offed charging control MOSFET, and lithium cell stops charging immediately, thereby prevents that lithium cell from damaging because of overcharging.In the discharge process, when battery voltage dropped to 40V (cell 2.5V), the DO pin output signal of CONTROL IC turn-offed discharge control MOSFET; Lithium cell stops discharge immediately; Thereby prevent that lithium cell from damaging because of overdischarge, a plurality of BALANCE pin of CONTROL IC are the current detecting pin, during output short-circuit; The conduction voltage drop that discharges and recharges control MOSFET increases severely; BALANCE pin voltage raises rapidly, and CONTROL IC output signal makes and discharges and recharges control MOSFET and turn-off rapidly, thereby realizes excess current or short-circuit protection.

The direct current (DC) that the lead-acid storage battery 9 of prior art provides directly through pinned coupler output, does not have protective circuit, and is as shown in Figure 4.

Claims

1. a mining electric locomotive comprises running gear and storage battery, and storage battery is to the power supply of the DC machine on the running gear, and it is characterized in that: said storage battery is a lithium iron phosphate storage battery, and it is connected with the IC of a said battery of protection.