CN-224217596-U - New energy battery pack safety device

CN224217596UCN 224217596 UCN224217596 UCN 224217596UCN-224217596-U

Abstract

The utility model discloses a safety protection device for a new energy battery pack, and belongs to the field of safety protection of new energy battery packs. The storage box mainly comprises a storage box, a plurality of through grooves are formed in the periphery of the storage box, a buffer groove is formed in one side, close to the middle of the storage box, of each through groove, an elastic diaphragm fixedly connected with the storage box is arranged between the buffer groove and the through groove, a ball body is arranged in the middle of the through groove, a plurality of springs are fixedly connected around the ball body, one ends of the springs are fixedly connected with the through grooves, the ball body is far away from one side of the storage box, a sliding rod is fixedly connected with one end of the sliding rod, the hemisphere is located the outer side of the storage box, piston holes are formed in two sides of the thickness of the through grooves, one end of each piston hole is in sealing connection with the corresponding buffer groove, a piston rod is connected to the other end of each piston hole in a sliding mode, and the other end of each piston rod is fixedly connected with the plane end of the hemisphere. According to the utility model, the plurality of groups of protection devices are arranged around the storage box, so that the impact of external force on the battery pack can be effectively prevented, and the safety of the battery is improved.

Inventors

YAN WEI
FENG GANG
XING AIBIN
GAO XINGLONG
ZHAO LINLIN
LIU XUEBAO

Assignees

北京汽车制造厂(青岛)有限公司

Dates

Publication Date: 20260508
Application Date: 20250514

Claims (5)

1. A safety protection device for a new energy battery pack comprises a storage box (1) and is characterized in that a plurality of through grooves (6) are formed in the periphery of the storage box (1), each through groove (6) is close to the middle of the storage box (1), a buffer groove (2) is formed in one side of the through groove (6), an elastic diaphragm (5) fixedly connected with the storage box (1) is arranged between the buffer groove (2) and the through groove (6), a ball body (9) is arranged in the middle of the through groove (6), a plurality of springs (4) are fixedly connected around the ball body (9), one ends of the springs (4) are fixedly connected with the through groove (6), one side of the ball body (9) is away from a sliding rod (3), one end of the sliding rod (3) is fixedly connected with a hemisphere (7), the hemisphere (7) is located on the outer side of the storage box (1), piston holes (10) are formed in two sides of the thickness of the through groove (6), one end of the piston hole (10) is in sealing connection with the buffer groove (2), the other end of the piston hole (10) is in sliding connection with the piston rod (8), and the other end of the piston rod is fixedly connected with a plane (8).
2. The safety protection device for the new energy battery pack according to claim 1, wherein the through groove (6) is an arc-shaped cavity.
3. The safety protection device for the new energy battery pack according to claim 1, wherein one end of the cambered surface of the hemisphere (7) faces to the outer side.
4. The safety protection device for the new energy battery pack according to claim 1, wherein two ends of the sliding rod (3) are respectively connected with the sphere centers of the sphere (9) and the hemisphere (7), the diameter of the hemisphere (7) is consistent with the thickness of the storage box (1), and the main body of the hemisphere (7) is made of rubber.
5. The safety protection device for the new energy battery pack is characterized in that a cavity for placing a battery is arranged in the middle of the storage box (1).

Description

New energy battery pack safety device Technical Field The utility model belongs to the field of safety protection of new energy battery packs, and particularly relates to a safety protection device of a new energy battery pack. Background In recent years, with rapid development of fields of new energy automobiles, energy storage systems and the like, a new energy battery pack (such as a lithium iron phosphate battery, a ternary lithium battery and the like) is taken as a core power source, and the safety and the reliability of the new energy battery pack are paid attention to. The battery pack may be subjected to external impact, vibration or extrusion during charge and discharge, transportation or use, and particularly is easily subjected to lateral impact, so that the internal structure of the battery is damaged, and even serious safety accidents such as thermal runaway, fire or explosion are caused. Therefore, how to effectively improve the impact resistance and the buffering capacity of the battery pack becomes one of the key problems to be solved in the technical field of new energy batteries. At present, the common battery pack protection device in the prior art adopts a mode of combining a rigid shell with a simple elastic material (such as foam, rubber pad and the like) to realize buffering, but when the structure is impacted in multiple directions, stress is difficult to uniformly disperse, local stress concentration can be caused, the protection effect is reduced, and the dynamic regulation capability on the internal pressure of the battery pack is lacked, so that the improvement of the safety performance of the battery pack protection device is further limited. The application provides a solution to the technical problem. Disclosure of utility model The utility model aims to solve the technical problems of overcoming the defects of the prior art and providing the safety protection device for the new energy battery pack, wherein a plurality of groups of protection devices are arranged around the storage box, so that the impact of external force on the battery pack can be effectively prevented, and the safety of the battery is improved. A new energy battery package safety device, including the case, a plurality of logical grooves have been seted up all around to the case, every logical groove is close to the middle one side of case and has been seted up the buffer tank, be equipped with between buffer tank and the logical groove with case fixed connection's elastic diaphragm, be equipped with the spheroid in the middle of the logical groove, fixedly connected with a plurality of springs around the spheroid, a plurality of spring one end and logical groove fixed connection, spheroid is kept away from case one side fixedly connected with litter, litter one end fixedly connected with hemisphere, the hemisphere is located the outside of case, logical groove thickness both sides have seted up the piston hole, piston hole one end and buffer tank sealing connection, piston hole other end sliding connection has the piston rod, the piston rod other end and hemisphere plane end fixed connection. Preferably, the through groove is an arc-shaped cavity. Preferably, one end of the hemispherical cambered surface faces to the outer side. Preferably, both ends of the sliding rod are respectively connected with the sphere and the sphere center of the hemisphere, the diameter of the hemisphere is consistent with the thickness of the storage box, and the main body of the hemisphere is made of rubber. Preferably, a cavity for placing the battery is arranged in the middle of the storage box. Compared with the prior art, the utility model has the beneficial effects that: According to the utility model, the plurality of groups of springs are arranged, when the impact occurs, the plurality of springs can respectively absorb the impact force, disperse the impact force, prevent the impact force from being overlarge, directly impact the inner cavity of the storage box to enable the storage box to collapse and extrude the battery pack, and the direction of the springs deviates from the battery pack, so that the impact force received by the other ends of the springs cannot be directed to the battery pack, the battery pack is prevented from being extruded when the impact force is overlarge, the damage to the battery is prevented, and the overall safety of the battery pack is improved. Drawings FIG. 1 is a schematic diagram of the overall structure of the present utility model; fig. 2 is a schematic diagram of a specific structure of a portion a in fig. 1. In the figure, 1, a storage box, 2, a buffer groove, 3, a sliding rod, 4, a spring, 5, an elastic diaphragm, 6, a through groove, 7, a hemisphere, 8, a piston rod, 9, a sphere, 10 and a piston hole. Detailed Description The utility model is further described below with reference to the accompanying drawings: The directional terminology referred to in the paragraphs directed to