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Athena hero 240w box mod Explosion Proof Design system

25.03.2016

What are the root causes of battery explosions and venting incidents?

 

1.Battery venting and explosion incidents are caused by short circuits - often exacerbated by over-charging, pushing batteries past their maximum discharge limit, and continuing to use batteries after they have reached the minimum voltage .

 

2.Obviously, the quality of the original battery cell also needs to be considered. Quality issues during the manufacture of lithium-ion batteries may lead to defective batteries being available on the market. For example, it is very easy for small metal particles or dust to get in between the positive and negative insulators leading to hard shorts when in use. If small fragments of copper or aluminum make it into the internals of the battery during manufacture, they will move around the battery due to thermal motion and can very easily cause short circuiting of the battery. The electrolytes in the battery are a flammable liquid, and sparks caused by a short circuit inside the battery can quickly lead to a venting or explosive incident. The battery will increase in temperature, potentially leading to thermal runway, quickly increasing the pressure inside the battery cell and potentially leading to the device surrounding it to set on fire or explode.

 

HERO240 Safety Features

1. 3 port parallel balance charging board, with a maximum charging current of 400mA using Texas Instrument's ICBQ76925 battery management system. Batteries will charge to a maximum of 4.25V. Once the first battery has reached 4.2V it will stop charging until the second and third batteries have reached an equal charge of 4.2V. It will then trickle charge to a maximum of 4.25V. If the charger is removed, the batteries will also stop charging.

 

2.If any single battery voltage reaches 3.2V, the total discharge power will reduce to lower than 9.3V to prevent deep discharge of the battery.

 

 

3.If any battery reaches 3.1V the device will stop discharging.

 

4.Circuit board protection: anti-polarity protection, short circuit proof design (input overcurrent protection), output short circuit protection.

 

5.Dual parallel output with a maximum output limited to 10.4V.

 

6.Real-time temperature detection (using ADI TMP36 dedicated IC). If the circuit board exceeds 75C, the device will stop outputting power.

 

7.Aluminum shell casing, with natural heat sink properties.