Can deflate the bump of lithium battery?

Lithium battery degassing

Battery bulge will affect the use of mobile phones or digital cameras, in addition to the existence of gas between the battery plate will also affect the capacity of the battery charge and discharge. After deflating, it can be restored to its original size and used normally.

Choose the top of the lithium battery close to the bottom edge of the seal cover (be careful not to punch holes in the bottom of the battery, there is no space), avoid electrode holes.

The graph below is two electrodes are on both sides respectively, want to punch in the middle place, it is aluminum case now, with extremely fine instrument screwdriver can be drilled with the hand, after drilling through 10 million can go deep, lest encounter electrode plate to wait for occurrence danger.

If you are lucky, you will hear the sound of gas running out after penetrating. If you are unlucky, there will be no movement, so the battery can no longer be used and the battery core needs to be changed.

After the hole in the bulging place can be appropriate hand extrusion is conducive to the discharge of gas between the plates.

Finally, seal with non-stick adhesive to avoid entering the air. It also can use some 705 silicone rubber sealant and so on.

You can see that there's room at the front of the lid

Pay attention to the wrong position of the battery may appear local short circuit ignition heating phenomenon. This position is not suitable for drilling.

The battery itself is damaged (here the battery is the cell itself), the internal battery is a vacuum structure, once the external damage, the battery is not far from the bad, the most direct phenomenon is bulging.

Battery overcharge, this is the most know, overcharge is caused by the charger is bad, more than 4.25 V batteries voltage will be basic, performance good batteries may discharge voltage drop in for a while and then no problem, serious may be unable to recover, even the pressing force is useless, generally it is difficult to flatten and external forces, which is just said the cause of the vacuum, or completely sealed more accurate)

Is the battery has been put, put the standard is the cell voltage under 2.7v, generally is the voltage under 2V after a lot of cells have bulging phenomenon, if less than 1V is basically scrapped!

Other factors, in addition to the above three points, there are some unpredictable factors, such as too high instantaneous voltage when charging (may exceed 5V), too high instantaneous current (such as a short circuit caused by infinite current).

Floating charging pressure is set too high, charging current is large, resulting in the positive plate oxygen precipitation speed, and too late in the negative compound, at the same time, the temperature rise in the battery body is also very fast, in the exhaust less than, when the pressure reaches a certain point, the valve-controlled sealed lead acid battery drum deformation.

Valve-controlled sealed lead-acid battery in the charging operation, especially in the series of battery pack, if the battery pack has been charged, if there is a poor quality of the battery will often appear internal gas composite poor phenomenon, and so on, resulting in bulging phenomenon. According to the above situation, when using valve-controlled sealed lead-acid battery, users should turn down the floating charging pressure and charging current. Do not use batteries of poor quality.

Very sure to tell you, cannot vent! When the seal is vacuum sealed, is to prevent water from entering. You do not have vacuum conditions at home, even if there is no laser welding, moreover, when sealing, square aluminum shell is vacuum smashing steel ball, soft package polymer is vacuum heating fusion PP layer.