NEGATIVE ELECTRODE PLATE, ELECTRODE ASSEMBLY, BATTERY CELL, BATTERY, AND ELECTRICAL DEVICE

1 . A negative electrode plate comprising:

a negative current collector and a negative active material layer disposed on the negative current collector, wherein

a plurality of pore channels are disposed in the negative active material layer.

2 . The negative electrode plate according to claim 1 , wherein the plurality of pore channels are evenly distributed in the negative active material layer.

3 . The negative electrode plate according to claim 1 , wherein a width W of each of the pore channels is 40 μm to 1000 μm.

4 . The negative electrode plate according to claim 3 , wherein the width W of the pore channel is 100 μm to 300 μm.

5 . The negative electrode plate according to claim 1 , wherein a spacing L between adjacent pore channels is 40 μm to 500 μm.

6 . The negative electrode plate according to claim 1 , wherein the pore channels comprise first channels extending along a first direction (x) and second channels extending along a second direction (y), a plurality of first channels and a plurality of second channels form a lattice structure, and the second direction (y) is perpendicular to the first direction (x).

7 . The negative electrode plate according to claim 1 , wherein each of the pore channels is a channel extending along a first direction (x), a plurality of the channels are arranged along a second direction (y) to form a striped structure, and the second direction (y) is perpendicular to the first direction (x).

8 . The negative electrode plate according to claim 1 , wherein the pore channels are holes, and a plurality of the holes form a hole array structure.

9 . The negative electrode plate according to claim 1 , wherein the pore channels are formed by a laser scribing process.

10 . The negative electrode plate according to claim 1 , wherein the negative active material layer comprises a negative active material, and a volume of the negative active material is less than a volume of a positive active material in a positive electrode plate corresponding to the negative electrode plate.

11 . The negative electrode plate according to claim 10 , wherein the volume of the negative active material is less than 80% of the volume of the positive active material.

12 . The negative electrode plate according to claim 10 , wherein the volume of the negative active material in a first region not provided with the pore channels in the negative active material layer is greater than the volume of the positive active material in a region corresponding to the first region in the positive electrode plate.

13 . The negative electrode plate according to claim 10 , wherein the volume of the negative active material in each of the pore channels is less than the volume of the positive active material in a region corresponding to the pore channel in the positive electrode plate.

14 . The negative electrode plate according to claim 13 , wherein the volume of the negative active material in each of the pore channels is less than 60% of the volume of the positive active material in the region corresponding to the pore channel in the positive electrode plate.

15 . An electrode assembly comprising:

the negative electrode plate according to claim 1 ;

a positive electrode plate, comprising a positive current collector and a positive active material disposed on the positive current collector; and

a separator, disposed between the negative electrode plate and the positive electrode plate.

16 . A battery cell comprising the electrode assembly according to claim 15 .

17 . A battery, comprising the battery cell according to claim 16 .

18 . An electrical device comprising the battery according to claim 17 , and the battery is configured to provide electrical energy.