Preparation method of secondary battery and secondary battery
A technology for secondary batteries and battery casings, which is used in the manufacture of electrolyte batteries, lithium batteries, battery pack components, etc. Time, increase the contact area, and solve the effect of difficult suction
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[0034] Example 1
[0035] A preparation method of a secondary battery, comprising the following steps:
[0036] The positive electrode material, the conductive agent and the positive electrode binder are mixed to make a slurry, which is coated on the positive electrode current collector, dried and rolled to obtain a positive electrode sheet; the positive electrode material can be a nickel-cobalt-manganese ternary material, lithium cobalt oxide Any one of materials, lithium iron phosphate materials, lithium-rich manganese-based materials, sulfur-carbon composite materials, lithium manganate materials, lithium nickel manganate materials, and nickel cobalt aluminum manganate materials; the conductive agent is carbon black (SP ); the binder can be polyvinylidene fluoride (PVDF); specifically, if the positive electrode material is a nickel-cobalt-manganese ternary material, the compaction density of the positive electrode sheet is greater than or equal to 3.6; if the positive elect...
Example Embodiment
[0045] Example 2
[0046] Different from Embodiment 1, a preparation method of a secondary battery includes the following steps:
[0047] Place the battery cells in the battery case and bake; among them, baking is to bake the battery cells by contacting the battery case, and the contact baking method can not only heat up quickly, but also ensure that each battery cell is heated. The cells are heated evenly and the baking effect is consistent, which is beneficial to the subsequent liquid injection process;
[0048] After the baking is completed, the electrolyte is injected into the battery case; wherein, the corresponding ends of the battery case are respectively provided with a first liquid injection port and a second liquid injection port, and the first liquid injection port and the first electrolyte are stored. The second liquid injection port is connected with the first vacuum pumping end; the first vacuum pumping end continuously pumps the electrolyte in the first electro...
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