Why choose li-ion battery pack for miner lamp

Most of China’s coal production companies have used lead-

acid batteries as a miner’s lamp power supply, in the long-

term use of this kind of Miner’s lamp, it has significant

deficiencies :

(1) large lamp size, heavy weight, will increase the burden

on underground workers;

(2) lamp in the use and maintenance of leak–prone, internal

corrosion will cause spills and lithium battery pack personal

injury accidents;

(3) extensive use of lead and antimony in lead-acid

batteries, heavy metals, causing serious pollution to the

environment, at present the European Union and the United

States has restricted the production of lead-acid batteries;

(4) the short cycle life,makes the storage and maintenance

more complex.

In recent years, many new power emerging, nickel-hydrogen

batteries, lithium-ion battery Pack has been used in a variety

of portable consumer electronics, with the development of

lithium-ion battery technology, the application field of

lithium-ion batteries from phones, MP3, Bluetooth headsets

and other small power extends to power tools, electric

bicycle, HEV/EV power supply, such as large power systems.

Lithium-ion battery in the above application areas show high

energy density, long cycle life characteristics, power lead-

acid, nickel-hydrogen battery performance has greatly

improved.

Lithium-ion batteries are widely used in miner’s lamp

Based on the foregoing analysis, believe that lithium-ion

batteries used in miner’s lamp areas should pay attention to

the following aspects:

(1) select high safety, good thermal stability of cathode

materials

Miner’s lamp from lithium-ion batteries in accident analysis

found that most of the battery and ternary material as

cathode material for lithium cobalt oxide. These two

materials in the lower capacity cell phone battery can meet

safety requirements,but easy

Increase might not be able to meet the stringent safety

requirements. In high-risk areas should be the case at

present high security performance, strong thermal stability

of lithium iron phosphate material.

(2) choose a reasonable structure design and production

technology

Current lithium-ion battery safety incidents is an important

cause of internal short circuit of the battery thermal

runaway, internal short circuit usually consists of particles in

the film production, poor ratio of positive and negative,

adverse factors such as production process control.

Therefore needed in structural design of cell to cell group

structure, lug leads way into full consideration, reduced risk

of internal short circuit and. Lithium ion battery in load

electric State Xia, from cathode material in the off

embedded out of lithium ion embedded to negative material

in the and negative of carbon material combined into lithium

carbon compounds, the compounds reaction activity is high,

dang battery by extrusion, and acupuncture or appeared

internal short-circuit Shi, plus or minus very occurred

contact, due to plus or minus very material pressure poor

high, blue cell 18650 batteryplus or minus very contact will

quickly reaction and released large of heat, caused battery

hot runaway even fire, and explosion, extreme situation

appeared. How to improving the thermal stability of cathode

materials to improve the safety of lithium-ion batteries, a

key used at the cathode surface coated with heat-resistant

material, anode surface coating treatment can improve the

stability of cathode, reducing negative contact area to

reduce the heat generation, battery heat control within a

certain range.

(3) optimizing the overall power structure design and

protecting circuit board design of Miner’s lamp using the

environment than the average power usage environment is

more complex, extreme, long-term working under high

temperature and high humidity, and is subject to strong

shock, drop, may, therefore high demands on the power

structure. Structure sealing strong, water-proof, dust-proof,

shell materials of high melting point, high thermal stability,

and overall structure is solid and reliable power, increase the

buffer between the core and shell, increase the impact

resistance of the power supply and falling capacity. The

internal battery and the protection circuit can be effective

protection of the shell, use environment avoiding damage to

the batteries.

Due to the characteristics of the lithium-ion battery itself, its

overcharge and short circuit situations prone to thermal

runaway, so protection circuits for the miner’s lamp battery

safety–critical, current lithium batteries

Manufacturers attach great importance to the protection of

circuit board design and development. Due to li ion battery

pack itself work voltage platform high, Miner’s lamp with

lithium ion battery without more section battery series

using, so protection circuit relative Yu electric tool or electric

bike simplified many, coupled with phone battery protection

circuit technology after years of development has very

mature, so miner’s lamp with lithium ion battery protection

circuit design Shang more need note of is electronic

components of reliability filter and the circuit board

detection, ensure each miner’s lamp power equipped with of

protection circuit board performance stable reliable.

Protection circuit board design and test power environment

you need to take full account of Miner’s lamp, with increased

reliability test under high temperature and high humidity

conditions.

From the analysis, we can see that, although the application

field of lithium-ion batteries in the miner’s lamp power is still

in the initial stage, exposed a number of problems. But from

the perspective of overall development of Miner’s lamp,

lithium-ion batteries because of its high energy density, long

cycle life will be marked by a new generation of the

preferred power supply for lamp. In the lithium-ion battery

manufacturers attention and effort, with all kinds of security

problems solved, lithium-ion batteries in miner’s lamp power

is more and more widely used in the field.