Battery Insulation Paper

Why do you have to paste barley paper on the battery cell? Highland barley paper is a traditional electrical insulation material, which has good insulation, high temperature resistance, wear resistance, heatstroke prevention and other characteristics. It can be used to stick on the positive pole...

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Why do you have to paste barley paper on the battery cell?

Highland barley paper is a traditional electrical insulation material, which has good insulation, high temperature resistance, wear resistance, heatstroke prevention and other characteristics. It can be used to stick on the positive pole of the battery on the battery, isolated from the insulation of the negative pole of the steel shell of the battery sheet, and increase the insulation strength.

On the one hand: because the PVC of the battery itself cannot withstand too much heat, if the battery pack generates too much overcurrent, it is easy to burn through the PVC insulation, short-circuit the positive and negative poles, and the internal energy of the battery will be released in a cycle, which may cause an explosion. Then add a layer of highland barley insulating paper, and the highland barley insulating paper can withstand high temperature. If the battery pack generates too much overcurrent, a layer of highland barley paper can protect the PVC, and the battery pack is not easy to short circuit.

On the other hand: prevent the battery pack from generating friction during the vibration process, thereby destroying the PVC of the battery itself and causing a short circuit. The highland barley paper can protect the PLC insulation.

What are the methods of pasting the insulating paper of the highland barley paper machine?

For users with smaller production volumes, stickers can be done manually.

However, if the production volume is large, manual stickers one by one will be very time-consuming and labor-intensive.

Then we can use machinery to replace manual work. Lithium battery sticker machine, a fully automatic sticker equipment specially developed by Red Leopard Technology for lithium battery stickers.

Item		Unit	Requirement
Thickness		mm	0.15	0.17	0.2	0.22	0.25	0.27	0.3	0.4	0.5
Thickness tolerance		mm	±0.02		±0.03					±0.04	±0.05
Density		g/m2	190±28	215±32	250±38	275±40	310±46	330±50	370±55	490±73	610±90
Film thickness		um	36
Tensile Strength	MD no bending	N/10m m	≥135	≥150	≥170	≥190	≥210	≥240	≥270	≥320	≥410


	MD after bending		≥80	≥90	≥100	≥120	≥130	≥140	≥150	≥230	≥300
	TD no bending		≥80	≥90	≥100	≥110	≥120	≥130	≥140	≥200	≥260
	TD after bending		≥60	≥60	≥80	≥80	≥80	≥90	≥100	≥130	≥170
Elongation	MD	%	≥2		≥3
（%）
	TD		≥8		≥10
Breakdown voltage	Not bending	kV	≥7

	After bending		≥6
Delamination		—	No Delamination, no bubble or other defects
Affected by heat（130±2℃） 10min			No Delamination, no bubble, no adhesive flow
Long-term heat resistance			≥120
(temperature index TI)
Weight and area conversion		m2/Kg	6.23	5.21	4.68	4.24	3.74	3.46	3.12	2.34	1.87