CN2510716Y

CN2510716Y - Nature-safety explosion-proof miner lamp

Info

Publication number: CN2510716Y
Application number: CN 01265779
Authority: CN
Inventors: 陈太华
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-10-26
Filing date: 2001-10-26
Publication date: 2002-09-11
Anticipated expiration: 2011-10-26

Abstract

The utility model relates to a safety explosion-proof mine lamp wearing on a downhole operation worker, which is composed of a lamp body and a battery box in which a chargeable lithium ion battery pack is arranged. The battery pack is connected with the lamp body through a flame-retardant cable, a two-stage battery charging and discharging circuit with double protection actions, and a short protection circuit. Each stage protection circuit comprises a bidirectional switch circuit and a battery protection electric appliance. In the use process of the mine lamp and the battery charging and discharging normally, the bidirectional switch circuit keeps conducting. When the battery has phenomena of over charge, or over discharge, or over current, or short circuit, etc., corresponding output end of a battery protector sends out signals to switch off the bidirectional switch circuit to stop the battery charging or discharging to prevent sparks to satisfy nature-safety explosion-proof requirements. The utility model has the advantages of safe use, good performance, small volume, light weight, long cyclic life, no pollution, etc.

Description

The inbeing safe explosion prevention mine lamp

Affiliated technical field

The utility model belongs to technical field of electronic equipment, relates to a kind of safety anti-explosive mine lamp of wearing usefulness for mines personnel underground work.

Background technology

Traditional ore deposit cap generally is the structure of configuration lead-acid battery with mine lamp, exist defectives such as volume and weight are big, pollution is big, cycle life weak point, self-discharge rate height, when failure conditions such as load short circuits, overcurrent occurring, the as easy as rolling off a log generation spark of cap lamp and cause gas explosion.Lithium ion battery is to come out in recent years and immediately be a kind of novel battery of extensive use, because it has that volume is little, in light weight, specific energy is high, pollution-free, advantage such as self-discharge rate is low, replaces lead-acid battery and with battery high social effect and economic worth is arranged undoubtedly as mine lamp with it.But it is the same with other battery; mine lamp equally also exists with lithium battery and overcharges or overdischarge all can have a strong impact on the problem in its service life; therefore in the lithium ion battery group, must increase overcharge, holding circuits such as overdischarge, overcurrent, just can reach the requirement that makes the mine lamp essential safety.

Summary of the invention

The purpose of this utility model is at the existing problem of state of the art, provides that a kind of novel structure, volume are little, in light weight, pollution-free, long service life and can effectively prevent the inbeing safe explosion prevention mine lamp of spark actuation gas.

For achieving the above object and the design technical solution be such: the inbeing safe explosion prevention mine lamp that is provided is a kind of novel cap lamp that adopts lithium ion battery as miner light storage battery; it by band charging connector mine lamp lamp body (load) and in be provided with the rechargeable lithium ion batteries group battery case form; battery pack is connected with lamp body by flame retardant cable; important structure feature of the present utility model is to be provided with the two-stage battery with double protection to fill in battery case; discharge and short-circuit protection circuit; every grade of holding circuit all contains a two-way switch circuit and a battery protection electrical equipment; said battery protector parallel connection is located at the battery pack two ends; said two-way switch circuit string is located between the on line of battery pack and mine lamp and charging connector, and the over-charging of battery of its input and battery protector is put and overcurrent output UNICOM.In the mine lamp use, when general normal the discharging and recharging of battery, the two-way switch circuit will keep conducting; When battery occurs overcharging, crosses and to put or load when phenomenon of the failure such as overcurrent, short circuit occurring, the battery protector corresponding output end will be sent signal and turn-off the two-way switch circuit, end battery charge or discharge, prevent that spark is to satisfy the inbeing safe explosion prevention requirement.

Compare with existing like product, the utlity model has following advantage:

1, security performance is good---and in this Explosion-proof miner's lamp dual-protection circuit is housed, can prevents battery overcharge, overdischarge, overcurrent, under the why barrier state in office, this mine lamp all can not produce spark, can prevent effectively that the phenomenon of spark actuation gas from taking place;

2, volume is little, in light weight---and the weight of this Explosion-proof miner's lamp has only about 1/10th (being reduced to 260kg by original 2.2g) of original cap lamp weight, and volume also has only about 1/5th of former cap lamp volume;

3, have extended cycle life---originally the life-span that recycles of cap lamp has only 250～300 times, and the cycle life of mine lamp described in the utility model can reach 500～600 times;

4, pollution-free---this Explosion-proof miner's lamp all can not produce any pollution in producing use and after scrapping, be a kind of real green power supply.

Description of drawings

Fig. 1 is a fundamental diagram of the present utility model.

Fig. 2 is the electrical block diagram of a specific embodiment of the utility model.

The specific embodiment

As shown in the figure; inbeing safe explosion prevention mine lamp described in the utility model is made up of lamp body 1, rechargeable lithium ion batteries group 5, the charge and discharge of two-stage battery and short-circuit protection circuit, flame retardant cable 2 and battery case 6; the sealing of battery case 6 usefulness insulation silica gel, the battery case cable pigtail connects with the water proof fire retardant joint.The core of this Explosion-proof miner's lamp is the two-stage charge and discharge and the short-circuit protection circuit of lithium ion battery; all contain a two-way switch circuit 3 and a battery protection electrical equipment 4 in every grade of holding circuit, the version of its single-level circuit embodiment as shown in Figure 2 provides.Battery protector 4 in this example structure is that the integrated chip of RNSVM112C constitutes by model, and two-way switch circuit 3 is made of MOSFET power switch V1, V2 and two parasitic backward dioded D1, D2 that are connected in respectively on V1, the V2 output grid of two differential concatenations.Input G1, the G2 of power switch V1, V2 is connected to the DOUT and the COUT output foot (the 4th and the 1st pin of RNSVM112C chip) of battery protector 4 respectively; S output string is located between the on line of battery pack 5 and mine lamp and charging connector 1, and D output family connects.The VSS end (3 pin) of battery protector 4 and VDD (5 pin) end are added in the two ends of lithium ion battery B, and the V_ end (6 pin) of protector 4 links with the S2 output of V2.

The current path of the utility model when battery charge is: charger positive output end → battery pack is negative (-) utmost point of parasitic reverse parallel connection diode D1 → power switch V2 → battery pack → charger negative terminal of (+) utmost point → lithium ion battery B positive pole → lithium ion battery B negative pole → power switch V1 just.The break-make of charging current is by power switch V2 control, and when over-charging of battery, the COUT of battery protector 4 end turn-offs V2 output signal, interrupts charging current.This Explosion-proof miner's lamp is when battery discharge, and its discharge current approach is: battery pack is parasitic reverse parallel connection diode D2 → power switch V1 → lithium ion battery B negative pole → lithium ion battery B positive pole → battery pack (+) utmost point just of negative (-) utmost point of (+) utmost point → load → battery pack → power switch V2 just.The break-make of power switch V1 control discharge current when battery over-discharge, turn-offs V1 output signal on the battery protector DOUT terminal, interrupts discharge current.In battery charge or the discharge process; when electric current increases; pressure drop on power switch V2 or the V1 will increase; the V_ end of battery protector 4 detects their pressure drop; excessive or when being short-circuited, this voltage will be above the shutter limit value of setting when electric current, the COUT of protector end or DOUT end turn-off power switch V1 or V2 output signal; end battery charge or discharge, prevent to produce spark to satisfy the inbeing safe explosion prevention requirement.Label F1 is a fuse among Fig. 2, and if in the battery set charge/discharge process when short circuit or over current fault occurring and make electric current surpass the current protection value (2A) that the user sets, F1 becomes off state, and battery pack stops to discharge and recharge.

Claims

1; a kind of inbeing safe explosion prevention mine lamp; by the mine lamp lamp body (1) of band charging connector and in be provided with rechargeable lithium ion batteries group (5) battery case (6) form; battery pack (5) connects by flame retardant cable (2) mine lamp body (1); it is characterized in that being provided with the two-stage battery in battery case (6) fills; discharge and short-circuit protection circuit; every grade of holding circuit all contains a two-way switch circuit (3) and a battery protection electrical equipment (4); said battery protector (4) parallel connection is located at battery pack (5) two ends; said two-way switch circuit (3) string is located between the on line of battery pack (5) and mine lamp and charging connector (1), and the over-charging of battery of its input and battery protector (4) is put and overcurrent output UNICOM.

2; inbeing safe explosion prevention mine lamp as claimed in claim 1; it is characterized in that said battery protector (4) is that the integrated chip of RNSVM112C constitutes by model; two-way switch circuit (3) is by the MOSFET power switch V1 of two differential concatenations; V2 and two are connected in V1 respectively; parasitic backward dioded D1 on the V2 output grid; D2 constitutes; V1; input (the G1 of V2; G2) be connected to the DOUT and the COUT leads ends of battery protector (4) respectively; V1; the S output string of V2 is located between the on line of battery pack (5) and mine lamp and charging connector (1); the VSS end and the vdd terminal of battery protector (4) are added in the lithium ion battery two ends, and the V=end of protector (4) links with the S2 output of V2.