参数资料
| 型号： | ATEVK527 |
| 厂商： | Atmel |
| 文件页数： | 5/35页 |
| 文件大小： | 0K |
| 描述： | KIT EVAL PWM AVR USB 4 SERIES |
| 标准包装： | 1 |
| 系列： | AVR® |
| 主要目的： | 电源管理，电池充电器 |
| 嵌入式： | 是，MCU，8 位 |
| 已用 IC / 零件： | ATmega16U4，ATmega32U4 |
| 主要属性： | 1 芯锂离子电池 |
| 次要属性： | 图形用户界面，USB 接口 |
| 已供物品： | 板 |
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AVR146
The electronic protection circuit works as follows:
? A solid-state switch is opened if the charge voltage of any cell reaches a given
threshold.
? A fuse cuts the current flow if the skin temperature of the cell approaches 90°C
(194°F).
? The current path is cut when cell voltage drops below a given threshold. This is in
order to prevent the battery from over-discharging.
Today, lithium-ion is one of the most successful and safe battery chemistries
available with billions of cells being produced every year.
3.2 Charging Li-Ion Batteries
There is only one way to charge lithium-based batteries. Manufacturers of Lithium-Ion
cells have very strict guidelines in charge procedures and the packs should be
charged as per the manufacturers "typical" charge technique.
Li-Ion batteries are charged using constant voltage (after having reached the nominal
charge voltage), with current limiter to avoid overheating in the initial stage of the
charging process. Charging is terminated when the charge current drops below a
threshold set by the manufacturer. Several parameters are monitored during the
charge: charge time, battery temperature… The battery takes damage from
overcharging and may explode if overcharged.
3.2.1 Safety
Static electricity or a faulty charger may destroy the battery's protection circuit and
turn solid-state switches to a permanent ON position. This may happen without the
user knowing. A battery with a faulty protection circuit may function normally but does
not provide protection against abuse.
Consumer grade lithium-ion batteries cannot be charged below 0°C (32°F). If charged
at cold temperatures, battery packs may appear to be charging normally but chemical
reactions inside the cells may cause permanent damage and can compromise the
safety of the pack.
The battery will become more vulnerable to failure if subjected to impact, crush or
high rate charging.
The battery must remain cool. A battery pack that gets hot during charge should not
be used.
3.2.2 Priming & Charge Intervals
Unlike many other types of rechargeable batteries, Lithium-Ion batteries do not need
th th
charge.
Lithium-ion batteries may be – and should be – charged often. The battery lasts
longer with partial rather than full discharges. Full discharges should be avoided
because of wear.
The battery loses capacity due to aging, whether used or not.
5
7801A-AVR-06/08
相关PDF资料 |
PDF描述 |
|---|---|
| ATICE10 | AVR IN CIRCUIT EMULATOR |
| ATICE50POD | REPLACEMENT POD FOR ICE40,ICE50 |
| ATQT600IB | BOARD INTERFACE ATQT600IB |
| ATSTK1000 | KIT STARTER FOR AVR32AP7000 |
| ATSTK501 | ADAPTER KIT FOR 64PIN AVR MCU |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ATEVKLCD100 | 功能描述:处理器配件 NGW100 ADD-ON QVGA LCD, AUDIO RoHS:否 制造商:Olimex Ltd. 产品:Cable 用于: |
| ATEVKLCD101 | 功能描述:处理器配件 NGW100 ADD-ON VGA LCD, AUDIO RoHS:否 制造商:Olimex Ltd. 产品:Cable 用于: |
| ATEVK-MXT1066T2-A | 功能描述:EVAL BOARD FOR MXT1066T2 制造商:microchip technology 系列:- 零件状态:在售 主要用途:接口，触摸屏控制器 嵌入式:- 使用的 IC/零件:mXT1066T2 主要属性:- 辅助属性:- 所含物品:板 标准包装:1 |
| ATEVK-MXT1189TAT-A | 功能描述:EVAL BOARD FOR MXT1189TAT 制造商:microchip technology 系列:- 零件状态:在售 主要用途:接口，触摸屏控制器 嵌入式:- 使用的 IC/零件:mXT1189TAT 主要属性:- 辅助属性:- 所含物品:板 标准包装:1 |
| ATEVK-MXT1189TAT-B | 功能描述:EVAL BOARD FOR MXT1189TAT 制造商:microchip technology 系列:- 零件状态:在售 主要用途:接口，触摸屏控制器 嵌入式:- 使用的 IC/零件:mXT1189TAT 主要属性:- 辅助属性:- 所含物品:板 标准包装:1 |
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