CN-224232858-U - Battery module and battery

CN224232858UCN 224232858 UCN224232858 UCN 224232858UCN-224232858-U

Abstract

The utility model discloses a battery, which comprises a battery shell and a battery core, wherein the battery core is arranged in the battery shell, a post is arranged on the battery shell, a explosion-proof hole is formed in one side face of the battery shell, an explosion-proof piece is connected to the explosion-proof hole, the explosion-proof hole and the post are arranged on different surfaces of the battery shell, a protruding portion is arranged on the explosion-proof piece, the protruding portion is arranged on the surface, close to the battery core, of the explosion-proof piece, the top face of the protruding portion protrudes out of the explosion-proof hole, the surface, close to the protruding portion, of the battery core is in contact with the top face of the protruding portion, and a hole or a gap for air flow to pass through is formed in the protruding portion. According to the battery, the gas flow passage of the explosion-proof piece is prevented from being blocked by the contact between the battery core and the inner surface of the battery shell, and the explosion-proof piece can be normally opened for deflation and pressure relief under the condition of thermal runaway of the battery. The utility model also discloses a battery module.

Inventors

YU YANPING
ZHANG YONGJIE
XU JIULING

Assignees

中创新航科技集团股份有限公司

Dates

Publication Date: 20260512
Application Date: 20250418

Claims (10)

1. A battery comprises a battery shell and a battery core, wherein the battery core is arranged in the battery shell, a pole column is arranged on the battery shell, and the battery is characterized in that, a explosion-proof hole is formed in one side face of the battery shell, an explosion-proof piece is connected to the explosion-proof hole, and the explosion-proof hole and the pole are arranged on different surfaces of the battery shell; The explosion-proof sheet is provided with a protruding portion, the protruding portion is arranged on the surface, close to the battery cell, of the explosion-proof sheet, the top surface of the protruding portion protrudes out of the explosion-proof hole, the surface, close to the protruding portion, of the battery cell is contacted with the top surface of the protruding portion, and a hole or a gap for air flow to pass through is formed in the protruding portion.
2. The battery of claim 1, wherein the post and the rupture disc are disposed on opposite sides of the battery housing.
3. The battery according to claim 1 or 2, wherein the explosion-proof sheet is provided with a score, and the boss is provided on a side of the score close to a wall of the explosion-proof hole.
4. The battery of claim 3, wherein the score and the boss are disposed on two surfaces of the rupture disc that are disposed opposite.
5. A battery according to claim 3, wherein the boss comprises a plurality of support ribs disposed about the score, adjacent two of the support ribs being spaced apart a first distance; the first distance is 3-20 mm.
6. The battery according to claim 5, wherein an insulating film is arranged on the outer surface of the battery cell, the elastic modulus of the insulating film is 1.5-4.6 gpa, and the first distance is 3-16 mm.
7. The battery of claim 3, wherein the protrusion is spaced from the score by a second distance of 3-10 mm.
8. The battery of claim 1, wherein a bottom plate is disposed between the battery cell and a wall of the battery case where the explosion-proof sheet is disposed, a top surface of the boss is in contact with a bottom surface of the bottom plate, a top surface of the bottom plate is in contact with a ground surface of the battery cell, and the bottom plate is for supporting the battery cell.
9. The battery according to claim 1, wherein the top surface of the protruding portion protrudes from the end surface of the explosion-proof hole by a third distance of 0.2-3 mm.
10. A battery module comprising a plurality of batteries, wherein the batteries are as claimed in any one of claims 1 to 9.

Description

Battery module and battery Technical Field The utility model relates to the technical field of energy devices, in particular to a battery module and a battery. Background The battery module is assembled by a plurality of batteries in a serial or parallel connection mode, and aims to provide higher voltage and capacity so as to meet the electric energy requirement of specific application. In the prior art, a battery generally includes a battery case and a battery cell disposed in the battery case, where the battery case is used to accommodate the battery cell and isolate the battery cell from the outside. The battery cell comprises a positive plate, a negative plate and a diaphragm which are stacked, wherein the diaphragm is positioned between the adjacent positive plate and the negative plate, the battery cell can be a winding battery cell or a lamination battery cell, the adjacent positive plate, the adjacent negative plate and the diaphragm in the winding battery cell are of an integrated structure, the adjacent positive plate and/or the adjacent negative plate in the lamination battery cell are of a split structure, the positive plate comprises a positive active material, the positive active material can be any one or the combination of a plurality of lithium iron phosphate, lithium nickel cobalt manganese oxide or lithium manganese iron phosphate, the negative active material comprises a negative active material, and the negative active material comprises any one or the combination of a plurality of artificial graphite, natural graphite, hard carbon, soft carbon or silicon-based materials. Wherein, be provided with explosion-proof valve on the top surface or the bottom surface of battery housing. The explosion-proof valve is also called an explosion-proof sheet, the explosion-proof sheet is a metal sheet for preventing the battery from explosion in thermal runaway. The explosion-proof piece is provided with a notch, and when the gas pressure in the battery shell exceeds a set threshold value, the explosion-proof piece is opened from the notch, and the gas is discharged for pressure relief, so that the explosion of the battery is prevented. When the explosion-proof piece sets up on the bottom surface of battery case, because the battery core is placed on the bottom surface of battery case, the explosion-proof piece position is plugged up easily to the battery core for the air current in the battery case can not flow to the explosion-proof piece position smoothly, makes the explosion-proof piece unable explosion when battery thermal runaway, thereby causes the battery case to destroy. Disclosure of utility model In view of the above, the utility model provides a battery, which avoids the contact between the battery core and the inner surface of the battery shell to block the gas flow passage of the explosion-proof piece, is convenient for the gas in the battery shell to flow to the explosion-proof piece, and ensures that the explosion-proof piece can normally open, deflate and release under the condition of thermal runaway of the battery. The utility model also provides a battery module. In order to achieve the above purpose, the present utility model provides the following technical solutions: The battery comprises a battery shell and a battery core, wherein the battery core is arranged in the battery shell, a pole column is arranged on the battery shell, a explosion-proof hole is formed in one side face of the battery shell, an explosion-proof piece is connected to the explosion-proof hole, and the explosion-proof hole and the pole column are arranged on different surfaces of the battery shell; The explosion-proof sheet is provided with a protruding portion, the protruding portion is arranged on the surface, close to the battery cell, of the explosion-proof sheet, the top surface of the protruding portion protrudes out of the explosion-proof hole, the surface, close to the protruding portion, of the battery cell is contacted with the top surface of the protruding portion, and a hole or a gap for air flow to pass through is formed in the protruding portion. According to the battery provided by the utility model, the bulge part is arranged on the surface of the explosion-proof piece, which is close to the battery core, and the explosion-proof hole is formed in the bulge part in a protruding manner and is used for supporting the battery core, so that the position of the explosion-proof piece can be prevented from being blocked by the surface of the battery core, which is close to the explosion-proof piece, a gap is ensured between the battery core and the shell surface of the battery shell, the inner surface of the battery shell is prevented from being contacted with the battery core to block the gas flow passage, the gas inside the battery shell can conveniently flow to the explosion-proof piece, and the explosion-proof piece can be normally opened for deflation under the condition of ensuring thermal run