zmk7635csi
28/11/12, 00:53:53
Pues investigando a la hora de comprar un cargador para el coche, me he encontrado que muchos de nosotros podemos acortar la vida y su capacidad de acumulación si usamos cargadores estandar, cutrillos, chinos o simplemente no diseñados para baterías LI-Po
1º Necesitamos un cargador con chip que monitorice la carga. Los buenos llevan 3 fases. Supervisión de carga, corte de carga cuando esté llena y función de mantenimiento. El típico cargador que todos tenemos va a fundir estas delicadas baterías si no corta la alimentación una vez estén llenas.
2º El proceso de carga no es lineal, necesitamos una carga gradual en relación al estado de la carga Como se lee en el ladrillo, necesitan una carga gradual y suave en su fase final (con este dato ahora entendemos proqué va tan despacio en la parte final de la carga)
Yo creo que deberían informar de este tipo de cosas.
Tampoco usar un cargador de pared que no sea el original.
Ladrillo de precauciones de este tipo de baerías:
LiPoly batteries must be charged carefully. The basic process is to charge at constant current until each cell reaches 4.2 V; the charger must then gradually reduce the charge current while holding the cell voltage at 4.2 V until the charge current has dropped to a small percentage of the initial charge rate, at which point the battery is considered 100% charged. Some manufacturers specify 2%, others 3%, but other values are also possible. The difference in achieved capacity is minute.
Balance charging simply means that the charger monitors the voltage of each cell in a pack and varies the charge on a per-cell basis so that all cells are brought to the same voltage.
Trickle charging is not recommended for lithium batteries.[9] Most manufacturers claim a maximum and minimum voltage of 4.23 and 3.0 volts per cell. Taking any cell outside these limits can reduce the cell's capacity and ability to deliver full rated current.
Most dedicated lithium polymer chargers use a charge timer for safety; this cuts the charge after a predefined time (typically 90 minutes).
All Li-Ion cells expand at high levels of state of charge (SOC); if uncontained, this may result in delamination, and reduction of reliability and cycle life; the case of cylindrical cells provides that containment, while pouch cells, by themselves, are not contained. Therefore, to achieve the rated performance, a battery composed of pouch cells must include a strong external casing to retain its shape.[5]
Overcharging a Li-poly battery can cause an explosion or fire.[citation needed]
During discharge on load, the load has to be removed as soon as the voltage drops below approximately 3.0 V[citation needed] per cell (used in a series combination), or else the battery[citation needed]will subsequently no longer accept a full charge and may experience problems holding voltage under load. Li-poly batteries can be protected by circuitry that prevents over-charge and deep-discharge.
Compared to the lithium-ion battery, Li-poly has a greater life cycle degradation rate.[citation needed]
]Lithium polymer-specific chargers are required in order to avoid fire and explosion.[citation needed]
Explosions can also occur if the battery is short-circuited, as tremendous current passes through the cell in an instant.
While charging the lithium polymer batteries, the individual cells in the pack should be charged evenly.For this purpose, the cells are to be charged with special chargers. This entails special care while charging the batteries in addition to incurring expenses on procuring the chargers specific to lithium polymer batteries.[citation needed]
1º Necesitamos un cargador con chip que monitorice la carga. Los buenos llevan 3 fases. Supervisión de carga, corte de carga cuando esté llena y función de mantenimiento. El típico cargador que todos tenemos va a fundir estas delicadas baterías si no corta la alimentación una vez estén llenas.
2º El proceso de carga no es lineal, necesitamos una carga gradual en relación al estado de la carga Como se lee en el ladrillo, necesitan una carga gradual y suave en su fase final (con este dato ahora entendemos proqué va tan despacio en la parte final de la carga)
Yo creo que deberían informar de este tipo de cosas.
Tampoco usar un cargador de pared que no sea el original.
Ladrillo de precauciones de este tipo de baerías:
LiPoly batteries must be charged carefully. The basic process is to charge at constant current until each cell reaches 4.2 V; the charger must then gradually reduce the charge current while holding the cell voltage at 4.2 V until the charge current has dropped to a small percentage of the initial charge rate, at which point the battery is considered 100% charged. Some manufacturers specify 2%, others 3%, but other values are also possible. The difference in achieved capacity is minute.
Balance charging simply means that the charger monitors the voltage of each cell in a pack and varies the charge on a per-cell basis so that all cells are brought to the same voltage.
Trickle charging is not recommended for lithium batteries.[9] Most manufacturers claim a maximum and minimum voltage of 4.23 and 3.0 volts per cell. Taking any cell outside these limits can reduce the cell's capacity and ability to deliver full rated current.
Most dedicated lithium polymer chargers use a charge timer for safety; this cuts the charge after a predefined time (typically 90 minutes).
All Li-Ion cells expand at high levels of state of charge (SOC); if uncontained, this may result in delamination, and reduction of reliability and cycle life; the case of cylindrical cells provides that containment, while pouch cells, by themselves, are not contained. Therefore, to achieve the rated performance, a battery composed of pouch cells must include a strong external casing to retain its shape.[5]
Overcharging a Li-poly battery can cause an explosion or fire.[citation needed]
During discharge on load, the load has to be removed as soon as the voltage drops below approximately 3.0 V[citation needed] per cell (used in a series combination), or else the battery[citation needed]will subsequently no longer accept a full charge and may experience problems holding voltage under load. Li-poly batteries can be protected by circuitry that prevents over-charge and deep-discharge.
Compared to the lithium-ion battery, Li-poly has a greater life cycle degradation rate.[citation needed]
]Lithium polymer-specific chargers are required in order to avoid fire and explosion.[citation needed]
Explosions can also occur if the battery is short-circuited, as tremendous current passes through the cell in an instant.
While charging the lithium polymer batteries, the individual cells in the pack should be charged evenly.For this purpose, the cells are to be charged with special chargers. This entails special care while charging the batteries in addition to incurring expenses on procuring the chargers specific to lithium polymer batteries.[citation needed]