Would like to share an incident that came upon me regarding a 3 cell 2200mA Lipo and because of trying to tweak or improve on something nearly had serious consequence but fortunately was caught in time !
For several years now I have been utilizing Shoe Goo… ( same as Amazing Goop, E-6000, etc…) to effect various gluing jobs where weight is of no concern …durable and most importantly not brittle…. since it was a good electrical dielectric I had utilized it over the years on several projects to prevent wiring harness from breaking off thru flexing/movement on cct boards, etc… I always preferred these goop glues over RTV because of their strength and that the bulk of RTVs being sold will corrode electrical components quickly due to the off gassing of acetic acid (from the web….”curing agents for RTVs with Acetoxy and Oxime are harmful to electronic components…. whereas RTVs utilizing Alkoxy and Acetone should only be utilized for potting electronics). Never had a problem till now……..
Two years ago I had squirted a little over a pea size amount of Shoe Goo into the opening of where the balancing and main power leads exits the cell. Because this particular cell’s construction, I was afraid that the balancing leads would eventually fall off over time and thus they required potting for additional strength …..hence the squirt of glue goop in the opening…..over the years this battery had performed flawlessly in my multi-copters and heli until I came to utilize it few days ago and discovered that one of the cells was giving me fluctuating voltages on the balancing leads yet the main power lead reading was OK ( I always check prior to flight and before charging)
Pealing back the protective tape to take a look…. I was shocked to discover that 3 of the balancing leads and the + main lead were severely corroded and one balancing lead had just fallen off…..I was surprised because I had never seen this anywhere else where I had utilized goop near electrical components but this was my first time on a Lipo….and to my surprise the glue was easy to peal off because it had broken down!
These goop glues all have perchloroethylene (dry cleaning fluid) in their mix and thus I started surfing the net for possible clues as to what might have occurred …….here is a link to an Occupational Health Guide for Perchloroethylene being a strong oxidizer in regards to certain elements….and what caught my eye was the mentioning of lithium ……also i heard that it was corrosive towards aluminum ( this cell's balancing connector wires)
From now on for me these glue goops are not coming anywhere near anything remotely electrical and I am lucky it was discovered on the ground vice in the air via a battery shorting out!
For several years now I have been utilizing Shoe Goo… ( same as Amazing Goop, E-6000, etc…) to effect various gluing jobs where weight is of no concern …durable and most importantly not brittle…. since it was a good electrical dielectric I had utilized it over the years on several projects to prevent wiring harness from breaking off thru flexing/movement on cct boards, etc… I always preferred these goop glues over RTV because of their strength and that the bulk of RTVs being sold will corrode electrical components quickly due to the off gassing of acetic acid (from the web….”curing agents for RTVs with Acetoxy and Oxime are harmful to electronic components…. whereas RTVs utilizing Alkoxy and Acetone should only be utilized for potting electronics). Never had a problem till now……..
Two years ago I had squirted a little over a pea size amount of Shoe Goo into the opening of where the balancing and main power leads exits the cell. Because this particular cell’s construction, I was afraid that the balancing leads would eventually fall off over time and thus they required potting for additional strength …..hence the squirt of glue goop in the opening…..over the years this battery had performed flawlessly in my multi-copters and heli until I came to utilize it few days ago and discovered that one of the cells was giving me fluctuating voltages on the balancing leads yet the main power lead reading was OK ( I always check prior to flight and before charging)
Pealing back the protective tape to take a look…. I was shocked to discover that 3 of the balancing leads and the + main lead were severely corroded and one balancing lead had just fallen off…..I was surprised because I had never seen this anywhere else where I had utilized goop near electrical components but this was my first time on a Lipo….and to my surprise the glue was easy to peal off because it had broken down!
These goop glues all have perchloroethylene (dry cleaning fluid) in their mix and thus I started surfing the net for possible clues as to what might have occurred …….here is a link to an Occupational Health Guide for Perchloroethylene being a strong oxidizer in regards to certain elements….and what caught my eye was the mentioning of lithium ……also i heard that it was corrosive towards aluminum ( this cell's balancing connector wires)
From now on for me these glue goops are not coming anywhere near anything remotely electrical and I am lucky it was discovered on the ground vice in the air via a battery shorting out!
