Battery module

1. A battery module, comprising:

a plurality of mono-batteries arranged side by side, each mono-battery having electrode terminals which are opposite in electrical polarity; and

an electrical connection sheet connecting at least two corresponding electrode terminals, the electrical connection sheet being formed with at least one fusing portion, each fusing portion being positioned between two adjacent electrode terminals connected by the electrical connection sheet;

wherein

the battery module further comprises: an insulating sheet supported on the fusing portion which is positioned between the two adjacent electrode terminals connected by the electrical connection sheet, when the fusing portion supporting the insulating sheet is fused and in turn a fracturing slit is formed, the insulating sheet drops into the fracturing slit to electrically isolate two facing sides of the electrical connection sheet which are at the fracturing slit,

wherein the battery module further comprises:

an insulating spacer provided above the plurality of mono-batteries and making the electrode terminals of all the mono-batteries exposed upwardly;

when the insulating sheet drops into the fracturing slit which is formed after the corresponding fusing portion is fused, the insulating sheet can be supported on the insulating spacer.

2. The battery module according to claim 1 , wherein

one insulating sheet is provided between the two adjacent electrode terminals connected by the electrical connection sheet, the insulating sheet is supported on all the fusing portions which are between the two adjacent electrode terminals connected by the electrical connection sheet.

3. The battery module according to claim 2 , wherein

the electrical connection sheet is provided with a through groove which is adjacent to the fusing portion and between the two adjacent electrode terminals connected by electrical connection sheet, the through groove extends along a width direction of the electrical connection sheet and passes through the electrical connection sheet along a thickness direction of the electrical connection sheet;

the insulating sheet comprises:

a supported portion supported on the fusing portion of the electrical connection sheet; and

a protruding portion protruding downwardly relative to the supported portion and inserting into the through groove of the electrical connection sheet.

4. The battery module according to claim 1 , wherein

a plurality of insulating sheets are provided between the two adjacent electrode terminals connected by the electrical connection sheet, each insulating sheet is supported on one fusing portion or a plurality of fusing portions between the two adjacent electrode terminals connected by the electrical connection sheet.

5. The battery module according to claim 4 , wherein

the electrical connection sheet is provided with a through groove which is between two adjacent fusing portions and is between the two adjacent electrode terminals connected by the electrical connection sheet, the through groove extends along a width direction of the electrical connection sheet and passes through the electrical connection sheet along a thickness direction of the electrical connection sheet;

each insulating sheet comprises:

a supported portion supported on the corresponding fusing portion of the electrical connection sheet; and

a protruding portion protruding downwardly relative to the supported portion and inserting into the corresponding through groove of the electrical connection sheet.

6. The battery module according to claim 4 , wherein

two adjacent insulating sheets are connected by a concave-convex fit structure, and the concave-convex fit structure has clearance fit so as to allow that the two adjacent insulating sheets can slide up and down relative to each other.

7. The battery module according to claim 2 , wherein

the electrical connection sheet has a plate shape, positions where the electrical connection sheet connects the at least two electrode terminals are arranged along a length direction of the electrical connection sheet, and all the fusing portions are arranged along a width direction of the electrical connection sheet.

8. The battery module according to claim 4 , wherein

the electrical connection sheet has a plate shape, positions where the electrical connection sheet connects the at least two electrode terminals are arranged along a length direction of the electrical connection sheet, and all the fusing portions are arranged along a width direction of the electrical connection sheet.

9. The battery module according to claim 2 , wherein

the electrical connection sheet has a comb shape having teeth, each tooth extends along a width direction of the electrical connection sheet and is electrically connected to one corresponding electrode terminal, and all the fusing portions are arranged along a length direction of the electrical connection sheet.

10. The battery module according to claim 4 , wherein

the electrical connection sheet has a comb shape having teeth, each tooth extends along a width direction of the electrical connection sheet and is electrically connected to one corresponding electrode terminal, and all the fusing portions are arranged along a length direction of the electrical connection sheet.

11. The battery module according to claim 1 , wherein the battery module further comprises:

an upper cover provided with a receiving groove to receive an end portion of the corresponding insulating sheet with clearance fit.