Cylindrical-structure lithium ion battery and preparation method thereof
A lithium ion, cylindrical technology, applied in the field of lithium ion cylindrical structure battery and its preparation, can solve the problems of large energy density limitation, large occupied space, small utilization space, etc., to improve safety, service life, convenience The effect of storing packaging and improving utilization
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Embodiment 1
[0034] Such as Figure 2-7 As shown, a lithium-ion cylindrical structure battery includes a cylindrical cell 1, the cell 1 is wrapped with a packaging film 2, and the positive tab 11 and the negative tab 12 of the cell 1 pass through the packaging film 2;
[0035] On the side wall of the battery cell 1 with the positive tab 11 and the negative tab 12 , the axes of the positive tab 11 , the negative tab 12 and the cell 1 are parallel to each other and have the same orientation.
[0036] The positive tab 11 and the negative tab 12 are located on the same circumference, and the outer wall of the packaging film 2 is provided with a circular sealing edge 3 for encapsulating the positive tab 11 and the negative tab 12 .
[0037] The positive tab 11 and the negative tab 12 are located on the same circumference, wherein, preferably, the positive tab 11 and the negative tab 12 are located at the same height on the side wall of the cell 1 , and are both arranged at the center of the cel...
Embodiment 2
[0043] Such as Figure 2-7 Shown, a kind of preparation method of lithium-ion cylindrical structure battery comprises the following steps:
[0044] The positive pole piece 13 and the negative pole piece 14 are respectively connected with the positive pole tab 11 and the negative pole pole piece 12. After that, the positive pole piece 13, the separator 15, the negative pole piece 14, and the membrane 15 are superimposed and wound into a cell 1, wherein the positive pole piece 11 and the negative pole piece 12 set at the tail end of the winding;
[0045] Respectively bend the positive tab 11 and the negative tab 12 into a horizontal state;
[0046] Stamping the packaging film 2 with grooves through the mold, placing the battery cell 1 in the packaging film 2 for packaging, and then sequentially performing liquid injection, chemical formation, molding, volume separation, and cutting and edge sealing;
[0047] After cutting and sealing, carry out shaping processing on the positi...
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