Charge Management Controller problem

Thread Starter

hakraf

Joined Jun 29, 2018
11
Hi,
I have designed a battery charging circuit with MCP73831 chip, after testing it for about 4h i ended with a swollen battery, this is the circuit i used

Untitled.png

the battery i'am using is 3.7v, 200mAh
45e380b9-05d3-4987-9a3b-64130b998cf2.jpg
the VDD is 4.8v, could anyone help me to found the problem ?
 

Dodgydave

Joined Jun 22, 2012
8,292
Your current is set at 178mA, with a 5K6 resistor. A 200mA cell should be charged at 200mA for 1 Hr, or 100mA 2Hrs,,50mA 4Hrs...etc.
 

Thread Starter

hakraf

Joined Jun 29, 2018
11
Hello,

Do you know what chemistry is used in the battery?
There are many types of lithium batteries around:
https://batteryuniversity.com/learn/article/types_of_lithium_ion
Here is a page about charging a lithium battery:
https://batteryuniversity.com/learn/article/charging_lithium_ion_batteries
And here is a page on lithium batteries safety:
https://batteryuniversity.com/index.php/learn/article/bu_304b_making_lithium_ion_safe

Bertus
No i don't know exactly what chemistry is used in it
 
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