CN221238591U - Battery cell air tightness detection device - Google Patents

Abstract

The utility model discloses a battery cell air tightness detection device, belongs to the technical field of air tightness detection, and solves the problems that the air tightness detection of a battery cell is difficult and the efficiency is low in the prior art. The electric power generation device mainly comprises an outer frame, wherein an air cylinder is arranged on the outer frame, a piston rod of the air cylinder is connected with an airtight cabin, the airtight cabin comprises a plurality of cabin bodies, an electric core is arranged in each cabin body, the electric core is fixed in each cabin body through an upper module and a lower module, the bottom of each cabin body is provided with an opening, the cabin body is provided with an air inlet, the air inlet is connected with external pressurizing equipment through an air inlet pipe, and a pressure sensor is arranged in each cabin body. The utility model adopts the air cylinder as power to control the opening and closing of the airtight cabin, and the upper and lower modules are arranged in the airtight cabin, so that the inside of the battery cell and the airtight cabin can form a closed space, and the airtight test is convenient.

Description

Battery cell air tightness detection device

Technical Field

The utility model relates to the technical field of air tightness detection, in particular to a battery cell air tightness detection device.

Background

In the manufacturing of cylindrical lithium battery, need to roll the groove to the electric core before annotating the liquid, make the smooth steel casing surface form the recess of degree of depth about 1mm, the electric core can appear being difficult for the crack that discovers with naked eyes after the groove, carries out the block laser welding and seals after the electric core annotates the liquid, seals the sealing member that uses and is the rubber spare, the condition of deformation, damage can not appear, also can lead to the problem that the leakproofness is not tight. Meanwhile, equipment and material instability can not be avoided in the production process, such as abnormal factors of hob abrasion, inaccurate positioning, poor material supply and the like, the existing production process does not carry out air tightness test on the battery cells after the rolling grooves and sealing, and the battery cells with poor tightness are not timely found and discharged, so that the battery cells are transferred to a post-process or a customer hand, and therefore some safety risks are caused.

The application with the publication number of CN202814661U in the prior art discloses a cylindrical battery seal tightness detection device, which comprises a pressure gauge, a high-pressure gas pipe joint, a steel needle, a workbench, a battery clamp and a cylinder, and is characterized in that the pressure gauge is connected with the high-pressure gas pipe joint; the battery clamp comprises a fixed clamping plate, a movable clamping plate, a guide rail and a silica gel pad, but the device is used for drilling holes on the battery cell before detection, so that the influence on the internal physicochemical property is easy, and the device which cannot damage the battery and can rapidly detect the air tightness of the battery cell is currently lacking.

Disclosure of Invention

The utility model aims to provide a battery cell air tightness detection device which is used for solving the problems that the air tightness detection of a battery cell is difficult and the efficiency is low in the prior art.

The utility model is realized by the following technical scheme:

the utility model provides a electricity core gas tightness detection device, includes the frame, be equipped with the cylinder on the frame, the piston rod of cylinder connect the airtight cabin, the airtight cabin includes a plurality of cabins, is equipped with the electricity core in the cabin, the electricity core is fixed in the cabin through last module and lower module, the cabin bottom opening, the air inlet has been seted up to the cabin, the air inlet passes through the outside pressurization equipment of intake-tube connection, the cabin is inside to be equipped with pressure sensor.

Further, the upper module is fixed at the top of the cabin body through screws, the lower module is fixed at the bottom of the outer frame through screws, the upper module and the lower module are vertically arranged, grooves are formed in the lower module, and the upper module and the lower module are made of elastic materials such as rubber or silica gel. .

Further, the diameter of the groove is about 0.2-0.5 mm larger than the diameter of the battery cell; the battery cell is trapped in the groove, so that the position of the battery cell is positioned and the battery cell is prevented from being reversed; the vertical distance between the upper module and the lower module is smaller than the height of the battery cell by about 0.2-1.0 mm, so that the inside of the battery cell is completely in a sealed state.

Further, a sealing ring is arranged at the bottom of the cabin body, so that the airtight cabin forms a closed space.

Furthermore, the sealing ring is made of elastic materials, such as rubber or silica gel, and the like, is wear-resistant and has elasticity.

Further, a gas flow sensor is arranged on the gas inlet pipe.

Compared with the prior art, the utility model has the beneficial effects that:

According to the utility model, the air cylinder is used as power to control the opening and closing of the airtight cabin, and the upper module and the lower module are arranged in the airtight cabin, so that the airtight space can be formed between the inside of the battery cell and the airtight cabin, and the airtight test is convenient; the gas flow sensor and the pressure sensor are arranged in the gas flow sensor, and the two monitoring devices are used for detecting cooperatively, so that the testing accuracy is improved.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of the capsule structure of the present utility model;

Fig. 3 is a schematic diagram of upper and lower modules of the present utility model.

In the figure: 1. an outer frame; 2. a cylinder; 3. an airtight cabin; 4. a battery cell; 5. an upper module; 6. a lower module; 7. a gas flow sensor; 8. an air inlet pipe; 9. a pressure sensor; 10. and (3) sealing rings.

Detailed Description

In order to make the technical solution of the present utility model better understood by those skilled in the art, the technical solution of the present utility model will be clearly and completely described in the following with reference to the accompanying drawings, and based on the embodiments of the present utility model, other similar embodiments obtained by those skilled in the art without making any inventive effort should be included in the scope of protection of the present utility model. In addition, directional words such as "upper", "lower", "left", "right", and the like, as used in the following embodiments are merely directions with reference to the drawings, and thus, the directional words used are intended to illustrate, not to limit, the utility model.

The utility model is further described below with reference to the accompanying drawings.

Embodiment 1, a battery cell gas tightness detection device, as shown in fig. 1, including frame 1, be equipped with cylinder 2 on the frame 1, cylinder 2's piston rod connect airtight cabin 3, airtight cabin 3 includes two cabins, the internal volume of every cabin is unanimous, is equipped with battery cell 4 in the cabin, battery cell 4 is fixed in the cabin through last module 5 and lower module 6, cabin bottom opening, the air inlet has been seted up to the cabin, the air inlet passes through intake pipe 8 and connects outside pressurization equipment, the cabin is inside to be equipped with pressure sensor 9.

In the embodiment 2, an electrical core air tightness detection device is provided, the upper module 5 is fixed on the top of the cabin body through screws, the lower module 6 is fixed on the bottom of the outer frame 1 through screws, the upper module 5 is vertically arranged with the lower module 6, the lower module 6 is provided with a groove, and the upper module 5 and the lower module 6 are made of rubber; the diameter of the groove is larger than the diameter of the battery cell 4 by about 0.4mm; the battery cell 4 is trapped in the groove, so that the position of the battery cell 4 is positioned and the battery cell 4 is prevented from being reversed; the vertical distance between the upper module 5 and the lower module 6 is smaller than the height of the battery cell 4 by about 0.5mm, so that the inside of the battery cell 4 is completely in a sealed state; the bottom of the cabin body is provided with a sealing ring 10, so that the airtight cabin 3 forms a closed space; the sealing ring 10 is made of rubber; the air inlet pipe 8 is provided with an air flow sensor 7. The other steps are the same as in example 1.

When the utility model works, the air cylinder 2 drives the airtight cabin 3 to ascend, the battery cell 4 is placed in the lower module 6, and the air cylinder 2 drives the airtight cabin 3 to press down, so that the battery cell 4 and the airtight cabin 3 are completely sealed at the same time. The air source is started, air is pressurized into the airtight cabin 3 through the air inlet pipe 8, the air inflow is monitored by the air flow sensor 7, and the cabin pressure is monitored by the pressure sensor 9. Firstly, a solid object with the same volume as the battery cell 4 is used as a standard component for testing, a fixed amount of gas is filled, meanwhile, the pressure in a cabin is detected, the pressurization is stopped when the pressure reaches more than 0.5Mpa, and the test value is used as a standard parameter for testing the sample battery cell 4 by the same method. If the amount of the gas filled is up, the pressure in the cabin is not up, which indicates that the gas enters the battery cell 4, and the air tightness test is not qualified. Because the airtight cabin 3 is positive in pressure during testing, a vacuum or other pressure relief devices can be added to relieve pressure in the airtight cabin 3.

The foregoing detailed description of the utility model has been presented for purposes of illustration and description, but is not intended to limit the scope of the utility model, i.e., the utility model is not limited to the details shown and described.

Claims (6)

1. The utility model provides a electricity core gas tightness detection device, includes frame (1), its characterized in that: the air cylinder is arranged on the outer frame (1), a piston rod of the air cylinder (2) is connected with the airtight cabin (3), the airtight cabin (3) comprises a plurality of cabin bodies, an electric core (4) is arranged in each cabin body, the electric core (4) is fixed in each cabin body through an upper module (5) and a lower module (6), an opening is formed in the bottom of each cabin body, an air inlet is formed in each cabin body, the air inlet is connected with external pressurizing equipment through an air inlet pipe (8), and a pressure sensor (9) is arranged in each cabin body.

2. The cell air tightness detection device according to claim 1, wherein: the upper module (5) is fixed at the top of the cabin body through screws, the lower module (6) is fixed at the bottom of the outer frame (1) through screws, the upper module (5) and the lower module (6) are vertically arranged, grooves are formed in the lower module (6), and the upper module (5) and the lower module (6) are made of elastic materials.

3. The cell air tightness detection device according to claim 2, wherein: the diameter of the groove is larger than that of the battery cell (4); the vertical distance between the upper module (5) and the lower module (6) is smaller than the height of the battery cell (4).

4. The cell air tightness detection device according to claim 1, wherein: the bottom of the cabin body is provided with a sealing ring (10).

5. The cell air tightness detection device according to claim 4, wherein: the sealing ring (10) is made of elastic materials.

6. The cell air tightness detection device according to claim 1, wherein: the air inlet pipe (8) is provided with a gas flow sensor (7).