CN-122026022-A - Safety protection device

CN122026022ACN 122026022 ACN122026022 ACN 122026022ACN-122026022-A

Abstract

The application discloses a safety protection device, which relates to the technical field of battery cell safety performance test and comprises a cylinder, a locking part, a cover body, a blocking layer, an air permeable structure, a locking part and a locking part, wherein a first rotating shaft is fixedly arranged outside the cylinder, the locking part is arranged outside the cylinder and can be switched between a locking state and an unlocking state, the cover body is used for covering an opening at the upper end of the cylinder and is connected to the first rotating shaft and can rotate around the first rotating shaft, the blocking layer is arranged between the cylinder and the cover body, one end of the blocking layer is rotatably connected to the first rotating shaft, the other end of the blocking layer is matched with the locking part, the blocking layer is fixed to the cylinder when the locking part is in the locking state, and the blocking layer can rotate around the first rotating shaft when the locking part is in the unlocking state. The safety protection device provided by the embodiment of the application not only can block the battery cell, but also has the pressure relief function.

Inventors

ZHANG ZHIYU
LIU CHENG
ZHU JIAWEI

Assignees

江苏天鹏电源有限公司

Dates

Publication Date: 20260512
Application Date: 20260408

Claims (10)

1. A safety shield apparatus, comprising: The device comprises a cylinder body, a locking part and a locking part, wherein a first rotating shaft is fixedly arranged outside the cylinder body; the cover body is used for covering the upper end opening of the cylinder body, is connected to the first rotating shaft and can rotate around the first rotating shaft; The blocking layer is arranged between the cylinder body and the cover body, a ventilation structure is arranged on the blocking layer, one end of the blocking layer is rotatably connected to the first rotating shaft, the other end of the blocking layer is matched with the locking part, the blocking layer is fixed on the cylinder body when the locking part is in a locking state, and the blocking layer can rotate around the first rotating shaft when the locking part is in an unlocking state.
2. The safety shield apparatus of claim 1, wherein the cover is configured to be opened either alone or simultaneously with the barrier layer.
3. A safety shield according to claim 1 or claim 2, wherein the material of at least one of the barrel, cover and barrier is selected from a metal or a flame retardant material.
4. A safety device according to claim 3, wherein the barrier layer is made of metal, the ventilation structure is a mesh structure, the mesh size of the mesh structure is smaller than a first predetermined value, and the distance between the barrier layer and the inner wall of the cylinder is smaller than a second predetermined value.
5. The safety shield apparatus of claim 4, wherein the first predetermined value and/or the second predetermined value is 18mm.
6. The safety shield apparatus according to claim 1, wherein an operation portion is fixedly connected to the other end of the blocking layer, and the blocking layer is engaged with the locking portion through the operation portion.
7. The safety protection device according to claim 6, wherein a second rotating shaft is fixedly arranged outside the cylinder body, the bottom end of the locking part is rotatably connected to the second rotating shaft, an inclined plane is arranged at the top of the locking part, a clamping groove is arranged below the inclined plane, when the blocking layer falls down due to gravity, the operating part is contacted with the inclined plane, so that the locking part is pushed to rotate around the second rotating shaft to be switched from a locking state to an unlocking state, the operating part moves downwards along the inclined plane until the operating part is separated from the inclined plane, the operating part enters the clamping groove, and meanwhile the locking part rotates around the second rotating shaft to return to the locking state.
8. The safety shield apparatus according to claim 7, wherein an elastic member is provided between the locking portion and the outer wall surface of the cylinder, the elastic member brings the locking portion into a locked state in the absence of an external force, and the locking portion is switched from the locked state to an unlocked state when the elastic member is compressed by applying pressure to the locking portion or the elastic member.
9. The safety device according to claim 7, wherein a first bracket is fixedly arranged outside the cylinder body, and the second rotating shaft is fixedly arranged on the first bracket; the first bracket is provided with a blocking mechanism at one side of the second rotating shaft, which is away from the cylinder body, and the blocking mechanism is used for limiting the locking part so that the locking part is in the locking state; the cylinder body is fixedly provided with a second support on one side opposite to the first support, the first rotating shaft is fixedly arranged on the second support, the cover body is fixedly provided with a first connecting frame connected with the first rotating shaft in a rotating mode, the blocking layer is fixedly provided with a second connecting frame connected with the first rotating shaft in a rotating mode, and the positions of the second support, the first connecting frame and the second connecting frame are corresponding.
10. The safety protection device according to claim 9, wherein the blocking layer has a size smaller than that of the inner wall of the cylinder, the cover body is provided with a first groove at a position close to the first connecting frame, the top of the cylinder is provided with a second groove, the first groove, the second groove and the second connecting frame are aligned, and the first groove and the second groove are used for accommodating part of the second connecting frame; The cover body is provided with a third groove on one side opposite to the first groove, the top of the cylinder body is provided with a fourth groove, the third groove, the fourth groove and the operating part are aligned, and the third groove and the fourth groove are used for accommodating part of the operating part.

Description

Safety protection device Technical Field The specification relates to electric core security performance test technical field, especially relates to a safety device. Background For the existing battery cell after the lithium ion battery safety performance test (typically heavy object impact test), the potential safety hazard is directly eliminated by soaking in saline water for a long time conventionally, but the performance parameters of the battery cell after the test, such as voltage, internal resistance, weight and the like, need to be collected in scientific research related tests, and the state of a sample can be damaged by the saline water. To meet the long-term reservation requirement of batchability, the current methods mainly include the following two methods: ① The common anti-burning barrel with the cover (shown in fig. 1) in the market is used, and has the advantages of convenient and time-saving operation, and has the defect that the battery core has small possibility of burning explosion (shown in fig. 2, which shows that the battery core can still detonate about 15min after the impact of a heavy object or 15min later), and the burning explosion battery core can blow out the barrel cover to fly out from the barrel, so that extremely high risk of hurting people exists (shown in fig. 3 and 4). ② The standard explosion-proof cabinet has the advantages of being provided with an explosion venting port, and has the defects of large mass, large volume, high cost, frequent door opening and closing, inconvenient movement and the like. Disclosure of Invention In view of the shortcomings of the prior art, an object of the present specification is to provide a safety protection device, which has a very simple structure, not only can block a battery cell, but also has a pressure relief function. To achieve the above object, embodiments of the present disclosure provide a safety device, including: The device comprises a cylinder body, a locking part and a locking part, wherein a first rotating shaft is fixedly arranged outside the cylinder body; the cover body is used for covering the upper end opening of the cylinder body, is connected to the first rotating shaft and can rotate around the first rotating shaft; The blocking layer is arranged between the cylinder body and the cover body, a ventilation structure is arranged on the blocking layer, one end of the blocking layer is rotatably connected to the first rotating shaft, the other end of the blocking layer is matched with the locking part, the blocking layer is fixed on the cylinder body when the locking part is in a locking state, and the blocking layer can rotate around the first rotating shaft when the locking part is in an unlocking state. As a preferred embodiment, the cover is configured to be opened either individually or simultaneously with the opening of the barrier layer. As a preferred embodiment, the material of at least one of the cylinder, the cover and the barrier layer is selected from a metal or a flame retardant material. The metal may be iron, aluminum alloy, stainless steel, etc., preferably stainless steel. The flame retardant material may be a flame retardant glass fiber board, flame retardant plastic, etc., and the flame retardant plastic may be selected from, for example, flame retardant acrylonitrile-butadiene-styrene copolymer (ABS), bakelite (phenolic plastic), etc. As a preferred embodiment, at least a portion of the area of the barrier layer contains a breathable structure. That is, the barrier layer may have a portion comprising a gas permeable structure and a portion comprising a gas impermeable metal layer, or the barrier layer may have a gas permeable structure throughout. As a preferred embodiment, the ventilation structure is a mesh structure. The mesh structure is preferably a cross-shaped mesh structure, the mesh size of the mesh structure is smaller than a first preset value, and the distance between the barrier layer and the inner wall of the cylinder is smaller than a second preset value. As a preferred embodiment, the first predetermined value and/or the second predetermined value is 18mm. As a preferred embodiment, the other end of the blocking layer is fixedly connected with an operation part, and the blocking layer is matched with the locking part through the operation part. The locking device comprises a cylinder body, a locking part, an operating part, a locking layer, a locking part and a locking part, wherein the cylinder body is fixedly provided with a second rotating shaft, the bottom end of the locking part is rotatably connected with the second rotating shaft, the top of the locking part is provided with an inclined plane, a clamping groove is formed below the inclined plane, when the blocking layer falls down due to gravity, the operating part is contacted with the inclined plane, so that the locking part is pushed to rotate around the second rotating shaft to be switched from a locking state to an u