Electrode plate rolling apparatus and electrode plate rolling method

1. An electrode plate rolling apparatus, configured to roll an electrode plate, wherein the electrode plate comprises a plurality of coated regions and a plurality of uncoated regions distributed alternately along a width direction of the electrode plate, and the electrode plate rolling apparatus comprises a roller group, a heating part, and a cooling part;

the heating part is configured to heat the electrode plate, and the cooling part is configured to cool the electrode plate;

the heating part further comprises a first extension assembly for extending the uncoated region when the heating part heats the electrode plate;

the electrode plate passes through the cooling part after passing through the heating part; and

the heating part and the cooling part are configured to reduce a difference between an extensibility parameter of the uncoated region and an extensibility parameter of the coated region,

wherein the electrode plate rolling apparatus further comprises a second extension assembly including a plurality of extension rollers disposed downstream of the cooling part, each extension roller for applying a pulling force to the electrode plate to extend the uncoated region and the coated region disposed between the heating part and the cooling part, and a tension monitoring part; and a control part of the electrode plate rolling apparatus is able to control a rotation speed of the extension roller according to a monitoring result of the tension monitoring part; and

wherein the heating part comprises multiple first heating units distributed alternately along the width direction of the electrode plate, each first heating unit being configured to directly heat a corresponding uncoated region, and the cooling part comprises first multiple cooling units distributed alternately along the width direction of the electrode plate, each first cooling unit is configured to directly cool a corresponding uncoated region.

2. The electrode plate rolling apparatus according to claim 1 , wherein the heating part snugly adjoins the cooling part.

3. The electrode plate rolling apparatus according to claim 1 , wherein the heating part further comprises multiple second heating units distributed alternately along the width direction of the electrode plate, and each second heating unit is configured to directly heat a corresponding coated region; and

the cooling part further comprises multiple second cooling units distributed alternately along the width direction of the electrode plate, and each second cooling unit is configured to directly cool a corresponding coated region.

4. The electrode plate rolling apparatus according to claim 3 , wherein the first heating unit heats the uncoated region to a first preset temperature, and the second heating unit heats the coated region to a second preset temperature;

the first preset temperature is higher than the second preset temperature; and

the first preset temperature is between a room temperature and 350° C., and the second preset temperature is between the room temperature and 350° C.

5. The electrode plate rolling apparatus according to claim 1 , wherein the heating part is an integrated structure, and the cooling part is an integrated structure.

6. The electrode plate rolling apparatus according to claim 1 , wherein the heating part comprises at least one of a magnetic induction heating part, a hot air heating part, a radiant heating part, an infrared heating part, or a microwave heating part.

7. The electrode plate rolling apparatus according to claim 1 , wherein the cooling part comprises at least one of an air cooling part, an air cooling chamber part, or a liquid cooling part.

8. The electrode plate rolling apparatus according to claim 1 , wherein an idler is disposed between the heating part and the roller group, and the electrode plate is wound on the idler so that the electrode plate is in a position that adapts to the heating part.