what is the battery internal resistance

The battery internal resistance is the battery at work,toshiba pa3285u-1brs battery the current flows through the battery received by the internal resistance, are generally divided into AC resistance and DC resistance, due to a small rechargeable battery internal resistance, the measured DC resistance when the electrode capacity due to a very technology, resulting in polarization resistance, we are unable to detect their true values, while the measured AC resistance can avoid the impact of polarization resistance obtained in the real resistance. AC resistance test methods are: the use of the toshiba pa3284u-1bas battery is equivalent to an active resistance characteristics of the battery a 1000HZ, 50m A constant current, its voltage is rectified filter and a series of sample handling, and thus accurately measure the resistance.
1, what is the standard anti-overcharge test?
IEC provides a standard lithium battery overcharge resistance test as follows: 1). To discharge the battery 0.2C to 3.0 V 2). With the current I arbitrarily set the 10V voltage on the battery charge, charge time is T = 2.5 * C5 / I 3). toshiba pa3465u-1brs battery explosion and fire is not the final
2, what is the short-circuit experiment?
Will be fully charged battery in the explosion-proof box with a wire directly connected to positive and negative, the battery should not be an explosion or fire.
3, what is the drop test?
After the battery is fully charged from three different directions on the 1m height fall on hard rubber plate in each direction, to do two times,toshiba pa3634u-1bas battery pack electrical properties should be normal, packaging without damage.
4, what is vibrating experiment?
Battery vibration test methods are: the battery to discharge 0.2C to 3.0V after the 1C charging, constant current constant voltage charging to 4.2V, cut-off current of 10mA, set aside 24 hours after the vibration according to the following conditions: amplitude of 0.8mm, so that the battery 10HZ – 55HZ between the vibration, toshiba satellite 2800 battery the vibration 1HZ per minute rate of increase or decrease, the battery voltage should be + / _0.02V between the resistance change in less than 5m.