Lithium ion battery using prismatic can with recessed surfaces
A lithium-ion battery, prismatic technology, applied to small-sized batteries/battery packs, large-sized batteries/battery packs, dry batteries, etc., can solve problems such as degradation of battery safety performance, deformation of protective shells, etc.
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Embodiment 1
[0046] The jelly-like cylinder of the comparative example is inserted into a prism-shaped shell with a concave portion on the surface of a width of 34 mm, a height of 48 mm, and a thickness of 10 mm. shaped aluminum plate, such as Figure 5 shown. Electrolyte is injected into the jelly-like cylinder, and the seam between the edge of the case and the lid is laser welded to create a prismatic lithium-ion battery.
[0047] Just as in the comparative example, the three prismatic lithium-ion batteries manufactured were charged and discharged, and the measurements of the external dimensions of the batteries were recorded in Table 1. After the impedance was measured, the discharge capacity of each cycle was recorded and expressed as exist Figure 14 middle.
[0048] The battery external dimension of Example 1 changed less than the prismatic Li-ion battery of Comparative Example using a conventional case, and continued to show the same results even when the number of cycles was fur...
Embodiment 2
[0054] As in the comparative example, the jelly-like cylinder was inserted into a prismatic casing with a concave portion on the surface of a width of 34 mm, a height of 48 mm, and a thickness of 10 mm. into, such as Figure 8 shown. Electrolyte is then added, and the seam between the edge of the case and the lid is laser welded to create the prismatic lithium-ion battery.
[0055] As in Comparative Example, charge and discharge experiments were performed on the manufactured prismatic lithium ion battery and the measured external dimensions of the battery were recorded. The change in external dimensions of the battery of Example 2 was smaller than that of the prismatic lithium ion battery of Comparative Example using a conventional case, and like Example 1, continued to show the same results even when the number of cycles was further increased.
[0056] The results of the impedance measurement indicated that the battery conductivity of Example 2 was better than the prismatic...
Embodiment 3
[0059] Like the comparative example, the jelly-like cylinder was inserted into a prismatic shell with a concave portion on the surface of a width of 34 mm, a height of 48 mm, and a thickness of 10 mm. ,Such as Figure 11 shown. Electrolyte is then added, and the seam between the edge of the case and the lid is laser welded to create the prismatic lithium-ion battery.
[0060] As in Comparative Example, charge and discharge experiments were performed on the manufactured prismatic lithium ion battery and the measured external dimensions of the battery were recorded. The change in the external dimensions of the battery of Example 3 was smaller than that of the prismatic lithium ion battery of Comparative Example using a conventional case, and like Example 1, continued to show the same results even when the number of cycles was further increased.
[0061] The results of the impedance measurement showed that the battery conductivity of Example 3 was better than the prismatic Li-i...
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