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SINOLI LITHIUM ION BATTERY TRIAINING V

Shenzhen Sinoli Electronic Co.,Ltd | Updated: Sep 16, 2018

SINOLI LITHIUM ION BATTERY TRIAINING V:


Q85: What are the possible causes of zero or low voltage in a single battery?


360直播吧01) external short circuit or overcharge or reverse charge (forced overcharge) of the battery;


02) the battery is continuously overcharged with high power rate and large current, resulting in expansion of the battery core and short circuit of direct contact between positive and negative poles.


3) short circuit or micro short circuit inside the battery, such as: pole contact short circuit caused by improper placement of positive and negative electrodes, or positive electrodes contact, etc.


Q86: What are the possible reasons for the zero or low voltage of the battery pack?


01) whether the single battery has zero voltage;


360直播吧02) short circuit and circuit break of plug, which is not connected well with plug;


03) unsoldering and virtual welding of leads and batteries;


4) wrong internal connection of the battery, including leakage welding, virtual welding and diswelding between the connecting piece and the battery;


360直播吧05) incorrect connection and damage of electronic components inside the battery.


Q87: What are the control methods to prevent overcharge of battery?


360直播吧In order to prevent the battery from overcharging, it is necessary to control the charging terminal. When the battery is full, some special information can be used to judge whether the charging terminal is reached. There are generally six methods to prevent the battery from overcharging:


01) peak voltage control: the charging terminal point is judged by detecting the peak voltage of the battery;


360直播吧02) dT/ dT control: the charging endpoint is determined by detecting the peak temperature change rate of the battery;


03) cooling T control: when the battery is fully charged, the difference between temperature and ambient temperature will be maximum;


04) -cooling V control: when the battery is fully charged up to a peak voltage, the voltage will drop to a certain value;


05) timing control: the charging end point is controlled by setting a certain charging time. Generally, the time required for charging 130% nominal capacity is set to control.


Q88: What is the possible reason that the battery and battery pack do not charge?


360直播吧01) there is a zero-voltage battery in the battery or battery pack;


02) wrong connection of battery pack, internal electronic component, abnormal protection circuit;


360直播吧03) failure of charging equipment, no output current;


4) external factors cause low charging efficiency (such as extremely low or extremely high temperature).


Q89: What is the possible reason that the battery and battery pack cannot discharge?


01) the battery life decreases after storage and use;


02) undercharged or uncharged;


03) the ambient temperature is too low;


360直播吧04) low discharge efficiency. For example, when large current discharge occurs, ordinary batteries cannot release electricity due to the fact that the internal material diffusion rate cannot keep up with the reaction rate, resulting in a sharp drop in voltage.


Q90: What are the possible reasons for the short discharge time of battery and battery pack?


360直播吧01) the battery is not fully charged, such as insufficient charging time and low charging efficiency;


02) discharge current is too large, resulting in lower discharge efficiency and shorter discharge time;


360直播吧03) when the ambient temperature is too low, the discharge efficiency decreases;