FEBRUARY 17TH, 2009
By ADMIN
Lithium-ion battery security features
Lithium-ion dell laptop battery has been very widely used in people’s daily lives, so it should definitely be the safety performance of lithium-ion batteries are the first assessment indicators. For lithium-ion battery safety performance assessment indicators, the international community provides for very strict standards, a qualified Li-ion batteries in the safety performance should meet the following conditions.
(1) Short Circuit: No fire, not explosion
(2) Overcharge: No fire, not explosion
(3) hot box test: no fire, not explosion (150 ℃ thermostat 10min)
(4) needle puncture: No explosion (Ф3mm nail penetration with batteries)
(5) the impact of flat-panel: no fire, not explosion (10kg weights since 1M height batteries)
(6) burning: No explosion (gas flame barbecue batteries)
Lithium-ion latitude d510 battery safety features are how to achieve the?
Lithium-ion batteries in order to ensure safe and reliable use, the experts had a very strict and careful design of the battery safety in order to achieve security assessment battery indicator.
(1) divide 135 ℃ Automatic shutdown protection
Adopting international advanced Celgard2300PE-PP-PE three-tier composite membrane. The battery temperature reached 120 ℃, the composite membrane on both sides of the PE film hole closed, the battery internal resistance increases, the battery internal temperature down, the battery temperature reached 135 ℃, when, PP film hole closed, the battery internal circuit, the battery is no longer warming, to ensure safe and reliable latitude d520 battery.
(2) add to the electric fluid additives
Overcharge the battery, the battery voltage higher than 4.2V under the conditions of electric and electro-hydraulic fluid additives in other polymeric material, the battery internal resistance of mates increased, the formation of large area internal battery circuit, the battery is no longer warming.
(3) the battery cover composite structure
The battery cover the use of explosion-proof structure notch, battery temperature, the battery internal activation generated by the process part of the gas expansion, the battery internal pressure increased, the pressure reaches a certain degree of notch rupture deflated.
(4) a variety of environmental abuse trial
For the misuse of tests, such as external short circuit, overcharge, acupuncture, flat shock, burning and so on, examining the safety performance of the battery. At the same time, the battery temperature shock test and vibration, drops, shocks and other mechanical properties test, inspect the battery in the actual use of environmental performance under the circumstances.
Lithium-ion latitude d600 battery are a new type of green environmental protection battery
“Care for the environment, the protection of the Earth” is our bounden duty of every individual. How the U.S. environmental philosophy reflected in the action then?
As a battery consumers should buy, the use of new green battery; as the battery manufacturers should be the production of new green battery. Only through the concerted efforts of everyone to create, protect our natural beauty and harmony.
New type of battery is the green environmental protection in recent years have been put into use or are being developed for a class of high-performance, non-polluting batteries. Has been substantial use of lithium-ion batteries, nickel metal hydride batteries and are promoting the use of mercury-free alkaline manganese dioxide batteries are being developed, as well as lithium or lithium ion plastic batteries, fuel cells, electrochemical energy storage supercapacitor are new green areas of the dell 312-0068. In addition, the current has been widely applied to the use of solar photovoltaic conversion of solar cells (also known as photovoltaic power generation), also fall into this category.
FEBRUARY 17TH, 2009
By ADMIN
Lithium-ion battery main components
(1) battery cover
(2) —- cathode active material for lithium cobalt oxide
(3) —- divide a special composite membrane
(4) —- cathode active material for carbon
(5) organic electrolyte
(6) Battery Shell
The advantages of lithium-ion dell laptop battery can
We have always said that the lithium-ion batteries are for the superiority of the traditional nickel-cadmium batteries (Ni / Cd) and nickel-metal hydride battery (Ni / MH) in terms of the. Then, lithium-ion battery good What went wrong?
(1) high voltage
(2) than the energy of large
(3) Long cycle life
(4) low self-discharge rate
(5) No memory effect
(6) non-polluting
The following is a nickel-cadmium, nickel hydrogen, lithium-ion battery performance comparison:
Technical parameters of Ni-Cd Battery Ni-MH inspiron 500m battery Lithium Ion Battery
Operating voltage (V) 1.21.23.6
Weight ratio of energy (Wh / Kg) 5065105-140
Volume ratio of energy (Wh / l) 150200300
Charge-discharge life (times) 5005001000
Self-discharge rate (% / month) 25-3030-356-9
Whether the memory effect has the availability of
Yes No Have non-polluting
(Note: The charging rate of 1C)
Lithium-ion battery Working Principle
Everyone already know that lithium-ion dell inspiron 510m battery cathode materials are lithium cobalt oxide, are carbon negative electrode.
Lithium-ion battery working principle refers to the principle of charging and discharging. When charging batteries, the batteries have a lithium-ion cathode generation, after generation of lithium-ion electrolyte to the anode exercise. As the carbon anode was layered structure, it has a lot of microporous, the arrival of Li-ion on the anode embedded in the porous carbon layer, the embedded lithium-ion more the higher the charge capacity.
Similarly, when the battery discharge (that is, we use the process of the battery), embedded in the carbon anode in lithium-ion layer extrusion, and sports back to cathode. Back to cathode of lithium-ion more higher discharge capacity. What we normally refer to the battery capacity is the discharge capacity.
Is not difficult to see, in the lithium-ion battery charge and discharge process, lithium-ion at the anode from the cathode → Sports → cathode status. If we take the lithium-ion battery Saying for a rocking chair, rocking chair at the two ends of the bipolar battery, and lithium-ion as the best athlete in the running back and forth at the two ends of a rocking chair. Therefore, the experts gave a lithium-ion inspiron 600m battery lovely name rocking chair batteries.
Lithium-ion battery assembly process
Lithium-ion battery technology is very stringent, complex and here only a brief one of several major processes.
(1) Pulping
Use of specialized solvents and adhesives in powder form with the negative electrode active material is mixed, with high-speed mixing evenly, the paste made of the positive and negative material.
(2) coating
Will be made from pulp evenly coating the surface of the metal foil and drying, respectively, a pole piece made of positive and negative.
(3) assembly
By cathode film - divide - negative film - diaphragm placed the order from top to bottom, the battery made by winding a very core, then injected into the electrolyte, sealing and other process, namely the completion of the battery assembly process, the system into a finished battery.
(4) into
With a dedicated battery charging and discharging equipment for finished battery charge and discharge test, for each battery are tested only selected qualified latitude d500 battery products to be manufactured.
FEBRUARY 12TH, 2009
By ADMIN
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