Nicd Battery Pack Thermistor

Hopefully someone here can shed some light no pun intended on the subject.

Nicd battery pack thermistor.

Nicd and nimh pack design harding battery handbook for quest rechargeable cells and battery packs section 7 1 contact harding for listing of current items in stock harding energy inc. I have searched everywhere online and it appears that no one else in the universe is experiencing the same issue as me. Ntc thermistor temperature sensors are a key component in li ion battery charging and safety. Whether you re powering your rc car or building a battlebot we have a pack that suits your needs.

Careful management of temperature during charging prolongs battery life and avoids hazards inherent to li ion batteries. The holders are the keystone model 92. All 6 of my milwaukee 18v nicd battery packs are dead. I verified the voltage on the battery pack and it was fine.

I m laying out a pcb for a nimh single aa cell charger following the avr450 application note battery charger for sla nicd nimh and li ion batteries but i m not sure where to place the ntc thermistor that will read the cell temperature throughout the charging process. So a 100 mah battery would be charged at 10 ma for 16 hours. 231 798 7033 fax 231 798 7044 ww hardingenergy com. I plan to lay out the cell holder like in the picture below.

The thermistor chip on fr4 sensor has been a solution for harsh environments with the possibility for battery fault conditions. This particular battery pack has a nominal voltage of 9 6v 8 cells in series 1 2v each. They provide critical temperature data required to keep the li ion battery in the optimum condition during the charging cycle. Does anyone have a better way of building them other than soder each battery.

I found a battery spot welder but it is like 5 000 bucks. This method does not require an end of charge sensor and ensures a full charge. Accurate temperature sensing is essential for safety reasons in any industry and any battery application. You should always measure your battery pack before plugging in your tool.

Excessive loading of the battery packs can create a dangerous overheating situation. Where can one find the temp sensor switches that are on the milwauki red lithium and dewalt 18 volt nicad battery packs. The cheapest way to charge a nickel cadmium battery is to charge at c 10 10 of the rated capacity per hour for 16 hours. I refuse to pay 80 for new ones so i rebuilt two of them with new 1 2v sub c nicd cells same ones used in the original pack.