Battery Temperature Rise – How to Trend and Analyze
应用文章
Secondary batteries such as nickel-metal-hydride (NiMH) or lithium-ion (Li-ion) that use fast or ultra-fast charging methods are commonly used in devices such as mobile phones, portable battery chargers, and compact cameras. These higher charging rates mean a higher current is being used to charge the batteries. For NiMH and Li-ion batteries the charging rate is 0.5 C* or 1 C*, depending upon the charging circuit design inside the electronics devices. While higher charging rates means the charging time is shorter, which is good for consumers, it can cause the temperature in the batteries and electronic charging circuit components. There are regulations that state the maximum charging temperature rise by the delta temperature rise from ambient, and by an absolute maximum temperature value. The charging temperature rise limit protects the consumer from safety hazards and potential discomfort caused by heat dissipation during the charging of their personal electronic devices. To ensure the charging temperature rise does not exceed the regulated limits, during product development engineers need to measure the maximum delta temperature rise and the absolute temperature.