Battery, electric apparatus, and method and device for preparing battery

1. A battery comprising:

a battery cell, provided with a pressure relief mechanism configured to be actuated in response to internal pressure or temperature in the battery cell reaching a threshold, to release the internal pressure;

a collection pipe configured to accommodate a firefighting medium; and

a firefighting pipe configured to connect to the collection pipe to allow the firefighting medium to be fed to the firefighting pipe, the firefighting pipe being configured to discharge the firefighting medium toward the battery cell in response to the pressure relief mechanism being actuated;

wherein two ends of the firefighting pipe are a first end and a second end respectively, the first end is configured to connect to the collection pipe to allow the firefighting medium to enter the firefighting pipe through the first end, and the second end is closed, wherein the firefighting pipe is higher than the collection pipe in a direction of gravity, so as to block the firefighting medium in the collection pipe when the pressure relief mechanism is not actuated.

2. The battery according to claim 1 , wherein the second end of the firefighting pipe is closed by a closure cap.

3. The battery according to claim 2 , wherein the second end has an opening, the closure cap comprises an end wall and a side wall that are joined to each other, the end wall is configured to block the opening, the side wall is arranged around a periphery of the opening, and the side wall is configured to hermetically engage with a pipe wall of the second end to seal the opening.

4. The battery according to claim 1 , wherein the firefighting pipe includes a weak portion configured to be broken by emissions from the battery cell in response to the pressure relief mechanism being actuated, to allow the firefighting medium to be discharged and enter the battery cell through the pressure relief mechanism.

5. The battery according to claim 1 , wherein two ends of the collection pipe are a third end and a fourth end respectively, the third end is configured to allow the firefighting medium to enter the collection pipe through the third end, and the fourth end is closed by a closure cap.

6. The battery according to claim 1 , further comprising:

a supporting member configured to support the collection pipe and including a pair of supporting arms spaced apart from each other, the pair of supporting arms being configured to support a pipe wall of the collection pipe facing the battery cell;

wherein a protruding portion is provided at the pipe wall of the collection pipe facing the battery cell, the protruding portion is configured to be arranged between the pair of supporting arms, and two sides of the protruding portion are supported by the pair of supporting arms.

7. The battery according to claim 1 , wherein:

the firefighting pipe is one of a plurality of firefighting pipes arranged spaced apart from each other on one side or two sides of the collection pipe;

the battery cell is one of a plurality of battery cells each belonging to one of at least two battery modules, each of the battery modules comprising at least one battery cell of the plurality of battery cells, and the pressure relief mechanism of each of the at least one battery cell in one of the at least two battery modules facing a same one of the plurality of firefighting pipes;

one of the battery modules comprises two or more of the battery cells arranged in an arrangement direction same as a length direction of one of the firefighting pipes that corresponds to the one of the battery modules; and

a length direction of the collection pipe forms a preset included angle with the arrangement direction.

8. The battery according to claim 7 , further comprising:

a restraint member configured to restrict the collection pipe between adjacent battery modules of the at least two battery modules;

wherein the restraint member comprises:

a restraint wall over the collection pipe and configured to restrict the collection pipe from moving in a direction leaving the battery cell; and

a leg connected to the restraint wall and configured to support the restraint wall, and located between the collection pipe and the adjacent battery modules to restrict the collection pipe;

wherein the leg is one of a pair of legs spaced apart from each other, and the collection pipe is restricted between the pair of legs.

9. The battery according to claim 8 , wherein the restraint wall abuts against a pipe wall of the collection pipe, wherein the restraint wall has an arc portion, and the arc portion protrudes toward the collection pipe to abut against the pipe wall of the collection pipe.

10. The battery according to claim 8 , wherein the leg is provided with a clamping portion, and the clamping portion protrudes toward the collection pipe to restrict the collection pipe, wherein the clamping portion abuts against a pipe wall of the collection pipe and/or is constructed as a cantilever structure.

11. The battery according to claim 8 , wherein the leg is provided with a clamping portion, and the clamping portion protrudes toward the collection pipe to restrict the collection pipe, wherein the clamping portion is constructed as a cantilever structure.

12. The battery according to claim 1 , further comprising:

a thermal management component configured to adjust temperature of the battery cell, the thermal management component being configured to connect to the collection pipe to allow the firefighting medium to be fed to the collection pipe.

13. An electric apparatus comprising:

a battery configured to provide electric energy, the battery including:

a battery cell, provided with a pressure relief mechanism configured to be actuated in response to internal pressure or temperature in the battery cell reaching a threshold, to release the internal pressure;

a collection pipe configured to accommodate a firefighting medium; and

a firefighting pipe configured to connect to the collection pipe to allow the firefighting medium to be fed to the firefighting pipe, the firefighting pipe being configured to discharge the firefighting medium toward the battery cell in response to the pressure relief mechanism being actuated;

wherein two ends of the firefighting pipe are a first end and a second end respectively, first end is configured to connect to the collection pipe to allow the firefighting medium to enter the firefighting pipe through the first end, and the second end is closed, wherein the firefighting pipe is higher than the collection pipe in a direction of gravity, so as to block the firefighting medium in the collection pipe when the pressure relief mechanism is not actuated.

14. A method for preparing a battery comprising:

providing a battery cell, the battery cell including a pressure relief mechanism configured to be actuated in response to internal pressure or temperature in the battery cell reaching a threshold, to release the internal pressure;

providing a collection pipe configured to accommodate a firefighting medium; and

connecting a firefighting pipe to the collection pipe to allow the firefighting medium to be fed to the firefighting pipe, the firefighting pipe is configured to discharge the firefighting medium toward the battery cell in response to the pressure relief mechanism being actuated, wherein the firefighting pipe is higher than the collection pipe in a direction of gravity, so as to block the firefighting medium in the collection pipe when the pressure relief mechanism is not actuated;

wherein two ends of the firefighting pipe are a first end and a second end respectively, the first end is configured to connect to the collection pipe to allow the firefighting medium to enter the firefighting pipe through the first end, and the second end is closed.