BATTERY CELL, METHOD AND EQUIPMENT FOR MANUFACTURING SAME, BATTERY, AND ELECTRICAL DEVICE

1 . A battery cell, comprising:

a housing, forming an accommodation cavity;

an electrode assembly, accommodated in the accommodation cavity, wherein the electrode assembly comprises a first electrode plate, a second electrode plate, and a separator disposed between the first electrode plate and the second electrode plate, and the first electrode plate and the second electrode plate are stacked along a first direction;

a first insulator, comprising a first insulation portion, wherein the first insulation portion is disposed on one side of the electrode assembly and parallel to the first direction, and the first insulation portion comprises a first channel that runs through the first insulation portion;

a support assembly, disposed on a side of the first insulation portion, the side being away from the electrode assembly, wherein the support assembly defines a second channel that communicates the first channel to the accommodation cavity, and at least a part of the second channel is disposed opposite to the first channel; and

a second insulator, wherein at least a part of the second insulator is disposed on a side of the support assembly and covers the first channel and a part of the second channel, the side being away from the first insulation portion.

2 . The battery cell according to claim 1 , wherein a dimension of the second channel is larger than a dimension of the first channel in a direction parallel to the first direction.

3 . The battery cell according to claim 2 , wherein the second channel completely covers the first channel.

4 . The battery cell according to claim 1 , wherein the support assembly comprises a support piece, the second channel comprises a conduit created on the support piece, and at least a part of the conduit is disposed opposite to the first channel.

5 . The battery cell according to claim 4 , wherein the second channel further comprises a first notch created on the support piece, and the first notch communicates with the conduit.

6 . The battery cell according to claim 1 , wherein the support assembly comprises at least two support pieces, and the second channel is formed between the at least two support pieces.

7 . The battery cell according to claim 6 , wherein the support assembly comprises two support pieces; the two support pieces are disposed apart on a side of the first insulation portion, the side being away from the electrode assembly; the second channel comprises a second space defined between the two support pieces; and at least a part of the second space is disposed opposite to the first channel.

8 . The battery cell according to claim 7 , wherein the second channel further comprises a second notch, the second notch is created on at least one of the two support pieces, and the second notch communicates with the second space.

9 . The battery cell according to claim 7 , wherein:

the two support pieces are distributed apart in parallel along the first direction; or

the two support pieces are distributed apart in parallel along a second direction, and the second direction is coplanar with and perpendicular to the first direction.

10 . The battery cell according to claim 6 , wherein the support assembly comprises three support pieces disposed on a side of the first insulation portion, the side being away from the electrode assembly; the three support pieces are distributed apart from each other; the second channel comprises a third space defined between every two adjacent support pieces; and at least a part of each third space communicates with the first channel.

11 . The battery cell according to claim 10 , wherein the second channel further comprises a third notch, the third notch is created on at least one of the three support pieces, and the third notch communicates with the third space.

12 . The battery cell according to claim 10 , wherein:

the three support pieces are distributed apart from and in parallel with each other along the first direction; or

the three support pieces are distributed apart from and in parallel with each other along a second direction, and the second direction is coplanar with and perpendicular to the first direction.

13 . The battery cell according to claim 6 , wherein:

the support assembly comprises four support pieces; the four support pieces are disposed apart along a periphery of the first insulation portion; and the second channel comprises a fourth space jointly defined by the four support pieces and a fifth space jointly defined by every two adjacent support pieces; and

at least a part of the fourth space is disposed opposite to the first channel, or at least a part of the fifth space is disposed opposite to the first channel.

14 . The battery cell according to claim 4 , wherein the support piece assumes a plate structure.

15 . The battery cell according to claim 1 , wherein the first insulator further comprises a plurality of second insulation portions connected to the first insulation portion; the plurality of second insulation portions each are folded along a line of connection at which the second insulation portion is connected to the first insulation portion, and gather together with the first insulation portion to form a cylindrical structure opened at a top of the cylindrical structure; the cylindrical structure wraps around the electrode assembly; and two adjacent second insulation portions are butt-jointed to or overlap each other outside the electrode assembly.

16 . The battery cell according to claim 15 , wherein the first insulation portion and the second insulation portion are formed in one piece.

17 . The battery cell according to claim 15 , wherein the second insulator comprises a first part and a second part that are formed in one piece; the first part is disposed on a side of the support assembly and covers the first channel and a part of the second channel, the side being away from the first insulation portion; and the second part covers a region of butt-joint or overlap between two adjacent second insulation portions outside the electrode assembly.

18 . A battery, comprising the battery cell according to claim 1 .

19 . An electrical device, comprising the battery cell according to claim 1 .

20 . A method for manufacturing a battery cell, comprising:

providing an electrode assembly, wherein the electrode assembly comprises a first electrode plate, a second electrode plate, and a separator disposed between the first electrode plate and the second electrode plate, and the first electrode plate and the second electrode plate are stacked along a first direction;

providing a first insulator comprising a first insulation portion, wherein the first insulation portion is disposed on one side of the electrode assembly and parallel to the first direction, and the first insulation portion comprises a first channel that runs through the first insulation portion;

providing a support assembly disposed on a side of the first insulation portion, the side being away from the electrode assembly, wherein the support assembly defines a second channel, and at least a part of the second channel is disposed opposite to the first channel;

providing a second insulator, wherein at least a part of the second insulator is disposed on a side of the support assembly and covers the first channel and a part of the second channel, the side being away from the first insulation portion; and

providing a housing, wherein the housing forms an accommodation cavity; the accommodation cavity accommodates an electrode assembly equipped with the first insulator, the support assembly, and the second insulator; and the second channel communicates the first channel to the accommodation cavity.