Archive for February, 2009

Sony to display erratic fuel cell design

Friday, February 27th, 2009
At yesterday’s meeting of the fifth Japan Hydrogen & Fuel Cell Expo on, Sony battery  demonstrated the eccentric 3 fuel-cell design. The first product  toshiba battery that looks like coffee machines, in fact it is the loudspeaker system shall, through the single-block fuel cell-driven, it can work for 12 months - if the use of no more than once a week. LED lights are used to illuminate the power module.

Second prototype look like the radio, in fact, it is a portable cell phone charger or MP3, which contains methanol fuel cell and a lithium-ion battery, USB interface can be carried out on the cell phone charger.

Products such as third prototype kitchen electronic scales, which are in fact interior portable power supply section, which includes fuel cells and lithium-ion toshiba PA3383U-1BRS  battery  portfolio, through the dual USB interface on the outside of the small device charger or power supply. At present, these products are yet to be determined release date.

Ideas: Let notebook battery have a long life

Friday, February 27th, 2009
Laptop is currently widely used lithium-ion batteries, in order to upgrade the battery capacity, manufacturers have been active efforts. How best to extend the battery life is also a large number of laptop users is extremely concerned about the things that today we take a look at some of the notebook battery maintenance skills.

The impact of laptop hp laptop battery are the key to standby time. To upgrade the quality of endurance capacity, pay attention to battery maintenance is essential.

1. In the use of laptop carefully read the user manual before the battery maintenance part of it;

2. When the first charge, you should continuously charge the battery to put 12 hours, and cycle to fully charge and discharge completely 3 times in order to awaken a new hp 338794-001;

3. If the prolonged use of external power supply, it is best to remove the battery. A lot of friends did not take note of this problem, use an external power supply not remove the battery will not only affect the battery life, but also to allow laptop cooling burden becomes even heavier, shortening the life of laptop. Lithium hp pavilion dv8000 battery ,charge and discharge the number of generally not more than 800 times, each time electric charge, it would shorten the life span of the first. If you use the half-way Plug Power required on many occasions, and the laptop does not pull out the built-in battery will give the battery , because each access to external power supply is equivalent to a battery charge.

4. Periodic charge and discharge. Even without the memory effect of the lithium-ion pavilion dv9000 battery exist a certain degree of inertia effects, a long time not to use lithium-ion will lose their activity, required re-activation. Therefore, if a long time (three weeks or longer) do not use a computer or the battery charge and discharge found that shorter time, the battery should be fully discharged before recharging, the general of each month at least one complete charge and discharge times.

5. Recharged when best to switch off the laptop, the sony laptop battery can completely full of electricity, do not unplug the power half-way in the charge. Shutdown charge than the boot more than 30% charge to shorten the charging time, and can extend the battery life. Best finish in 30 minutes after charging use.

6. To prevent exposure to prevent damp to prevent the chemical liquid erosion, avoid contact with the metal sony pcga-bp2nx contacts, such as short-circuit happened happen.

Battery pack protection circuit

Friday, February 27th, 2009
Batteries contain a lot of battery protection circuit, if more than the maximum battery voltage, the circuit connecting thehp battery temporarily disconnected.

Bq24314 chip implementation with security protection - a complete front-end protection of lithium-ion battery charger.

Bq24314 chip with integrated power FET; Vin great value for 30V; OCP programmable currents up to 15A; battery OVP for 4.35V; have fault indication features.

The chip provides for the protection of three variables, namely, input over-voltage and input over-current and  HSTNN-DB02 battery over-voltage; 30V input voltage greatly; for the current transient caused by an error has a higher trigger immunity; thermal shutdown, that is, fault status display with the current listing of the minimum solution. bq24300 and bq24314 charger front-end product line circuit for charging of handheld devices to provide system protection. The compact size of the safety circuit can provide three-tier protection function, that is, people over-voltage Des, Des person over-voltage protection and toshiba PA3399U-1BRS  batttery  over-current state.