Lithium battery and preparation method therefor
A lithium battery and cell technology, applied in secondary batteries, battery pack components, circuits, etc., can solve the problem of positive electrode/negative electrode coiling, restricting the development of thinner batteries, positive electrode/negative electrode lug and production The core operation is difficult and other problems, to achieve the effect of reducing the thickness
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Embodiment 1
[0029] Such as Figure 1-3 As shown, a lithium battery includes a flat wound cell. The wound cell includes two plates, a positive plate 1 and a negative plate 2, respectively, and a separator 3 is arranged between the two plates. ;
[0030] The end of the pole plate is provided with a spot welding empty foil area 4 for connecting the tab 5, the front of the pole plate is the powder area 6, the back includes the powder area 6 and the non-powder area 7, and the non-powder area 7 on the back of the electrode plate is located Spot welding between the empty foil area 4 and the powder area 6, and the area of the non-powder area 7 is not greater than the area of the powder area 6;
[0031] The ends of the two pole plates face oppositely, and the two tabs 5 are arranged at the two ends of the wound cell in the width direction, and are respectively located at the top and bottom of the wound cell.
[0032] In the lithium battery provided by the foregoing embodiment, the area of the non-...
Embodiment 2
[0035] Such as Figure 1-3 As shown, a lithium battery includes a flat wound cell. The wound cell includes two plates, a positive plate 1 and a negative plate 2, respectively, and a separator 3 is arranged between the two plates. ;
[0036] The end of the pole plate is provided with a spot welding empty foil area 4 for connecting the tab 5, the front of the pole plate is the powder area 6, the back includes the powder area 6 and the non-powder area 7, and the non-powder area 7 on the back of the electrode plate is located Spot welding between the empty foil area 4 and the powder area 6, and the area of the non-powder area 7 is not greater than the area of the powder area 6;
[0037] The ends of the two pole plates face oppositely, and the two tabs 5 are arranged at the two ends of the wound cell in the width direction, and are respectively located at the top and bottom of the wound cell.
[0038] The head end of the diaphragm 3 is located inside the wound cell, and the end of th...
Embodiment 3
[0045] Such as Figure 1-4 As shown, a method for preparing a lithium battery includes the following steps:
[0046] Prepare positive plate 1 and negative plate 2; reserve spot welding empty foil area 4 at the end of the plate, the front of the plate is powder area 6, the back part is powder area 6, reserved non-powder area 7, non-powder area 7 Located between the powder area 6 and the spot welding empty foil area 4, and the width of the non-powder area 7 is not greater than the width of the powder area 6, the powder area 6 of the positive plate 1 is coated with positive electrode powder, and the spot welding empty foil area 4 is connected to the positive electrode Ears, the powder area 6 of the positive plate 1 is coated with negative powder, and the empty foil area 4 is spot welded to connect the negative ear;
[0047] Winding molding: Wrap the middle of the separator 3 into an S shape including two openings. Place the beginning ends of the positive electrode plate 1 and the neg...
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