Air tightness detection cavity for battery cell

Abstract

The utility model discloses a battery cell airtightness detection cavity. The cavity comprises an upper cavity and a lower cavity which can be used for sealing and closing the mold, an upper bushing is mounted in the upper cavity, a lower bushing is mounted in the lower cavity, and a plurality of mounting cavities which are communicated with one another are formed between the upper bushing and the lower bushing; wherein the top of the upper cavity is connected with a sealing plate, the sealing plate is provided with a plurality of functional interfaces, one part of the functional interfaces are communicated with the interior of the upper cavity, and the other part of the functional interfaces are all communicated with at least one mounting cavity; and the bottom of the lower cavity is also provided with a carrier gas interface communicated with the interior of the lower cavity. According to the battery cell airtightness detection cavity, airtightness detection can be carried out on a plurality of batteries at the same time, the detection efficiency is greatly improved, meanwhile, a carrier gas function is introduced, the problem that the detection signal of a battery cell far away from a test port is weak is solved, and the occupied space and various costs of equipment are greatly saved.

Description

Technical Field

[0001] The utility model relates to the field of battery testing equipment, in particular to an airtight testing cavity for a battery core. Background Art

[0002] When testing the airtightness of products such as lithium batteries and cells, testing each product individually would significantly reduce testing efficiency. Therefore, batch testing is typically performed on multiple products at once. However, during batch testing, the test signal from cells farther from the test port is often weaker, making it difficult to guarantee the test results. Installing more equipment to address this issue would take up more space and increase testing costs. Utility Model Content

[0003] In order to solve the above problems, the utility model provides a battery cell airtightness detection chamber. This invention can not only perform airtightness detection on multiple batteries at the same time, greatly improving the detection efficiency, but also introduces a carrier gas function, which solves the problem of weak battery cell detection signals at a distance from the test port, and greatly saves the equipment's floor space and various costs.

[0004] According to one aspect of the utility model, a battery cell airtightness detection cavity is provided, comprising an upper cavity and a lower cavity capable of sealing and closing a mold, an upper bushing is installed in the upper cavity, a lower bushing is installed in the lower cavity, and a plurality of mutually connected installation cavities are formed between the upper bushing and the lower bushing; wherein, a sealing plate is connected to the top of the upper cavity, and a plurality of functional interfaces are provided on the sealing plate, wherein a part of the functional interfaces are communicated with the interior of the upper cavity, and another part of the functional interfaces are all communicated with at least one of the installation cavities; a carrier gas interface communicated with the interior of the lower cavity is also provided at the bottom of the lower cavity.

[0005] In some embodiments, the upper cavity and the lower cavity are both made of stainless steel. The advantage of using stainless steel to make the upper cavity and the lower cavity is that they have the characteristics of high strength and corrosion resistance.

[0006] In some embodiments, the upper bushing and the lower bushing are both made of PET material. The advantage of using PET material to make the upper bushing and the lower bushing is that they are corrosion-resistant.

[0007] In some embodiments, the mounting cavities are arranged in multiple rows and columns, which is beneficial in that the products can also be mounted in multiple rows and columns.

[0008] In some embodiments, each corner of the sealing plate can be supported by a plurality of vertical lifting rods that can be raised and lowered. The advantage is that when the lifting rods are in operation, they can drive the sealing plate and the upper cavity to rise and fall, thereby closing or separating the mold with the lower cavity.

[0009] In some embodiments, at least one sensor is mounted on the exterior of each side of the lower cavity, with each sensor facing the lower cavity and positioned higher than the lower cavity. This is advantageous in that after each product is loaded into the detection cavity and before the upper and lower cavities are molded together, the sensors can be used to detect the installation status of each product. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic structural diagram of a battery cell airtightness detection cavity according to one embodiment of the present utility model;

[0011] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure of the battery cell airtightness detection cavity shown

[0012] Figure 3 for Figure 1 The diagram shows the structure of the battery cell airtightness detection cavity after removing the upper cavity.

[0013] In the figure: upper cavity 1, lower cavity 2, upper bushing 3, lower bushing 4, installation cavity 5, sealing plate 6, functional interface 7, carrier gas interface 8, lifting support rod 9, sensor 10, product 11. DETAILED DESCRIPTION

[0014] The present invention will be further described in detail below with reference to the accompanying drawings.

[0015] like Figure 1-3 As shown, the inspection chamber includes an upper cavity 1 and a lower cavity 2 capable of sealing the mold. An upper bushing 3 is installed in the upper cavity 1, and a lower bushing 4 is installed in the lower cavity 2. Multiple interconnected mounting cavities 5 are formed between the upper bushing 3 and the lower bushing 4. Each mounting cavity 5 is used to install a product 11 to be inspected (battery cells are used as an example in this embodiment). Each product 11 is fixedly mounted on the lower bushing 4.

[0016] Preferably, the upper cavity 1 and the lower cavity 2 are both made of high-strength, corrosion-resistant stainless steel, and the upper bushing 3 and the lower bushing 4 are both made of corrosion-resistant PET material.

[0017] Preferably, each mounting cavity 5 is arranged in multiple rows and columns. In this embodiment, taking the arrangement of thirty mounting cavities 5 as an example, they can be arranged in three rows and ten columns.

[0018] A sealing plate 6 is connected to the top of the upper cavity 1. Each corner of the sealing plate 6 is supported by a plurality of vertical lifting rods 9 that can be raised and lowered. When the lifting rods 9 are in operation, the sealing plate 6 and the upper cavity 1 can be raised and lowered, thereby closing or separating the mold with the lower cavity 2.

[0019] A plurality of functional interfaces 7 are provided on the sealing plate 6, wherein some of the functional interfaces 7 are connected with the interior of the upper cavity 1, and are used for vacuuming, breaking the air, blowing negative pressure into the detection cavity, etc., while the other functional interfaces 7 are connected with at least one installation cavity 5, and are used for testing, blowing positive pressure, etc. into the detection cavity.

[0020] In addition, a carrier gas interface 8 is provided at the bottom of the lower cavity 2 , and the carrier gas interface 8 is communicated with the interior of the lower cavity 2 .

[0021] Preferably, at least one (the number is generally related to the setting of each installation cavity 5) sensor 10 is installed on the outside of both sides of the lower cavity 2, and each sensor 10 is facing the lower cavity 2 and is higher than the lower cavity 2. Then, after each product 11 is loaded into the detection cavity, before the upper cavity 1 and the lower cavity 2 are molded together, each sensor 10 can be used to detect the installation status of each product 11.

[0022] After the upper and lower cavities 1 and 2 are molded and sealed, the interior of the test cavity is evacuated. Once a certain vacuum is achieved, all batteries are tested simultaneously. During the test, a constant flow of clean gas is introduced into the test cavity through the carrier gas interface 8, accelerating the movement of gas molecules in the high vacuum environment, thereby enabling the detection instrument connected to the test cavity to detect gas signals more quickly. After the test is completed, the test cavity is evacuated.

[0023] If the test fails, remove the lower bushing 4 and each product 11. Then, connect the corresponding equipment using the positive and negative pressure purge interfaces 7 to clean the test chamber by introducing nitrogen. After cleaning, insert a clean lower bushing 4 and continue loading the next batch of products for testing.

[0024] The above descriptions are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A battery cell airtightness detection chamber, characterized by: The invention comprises an upper cavity (1) and a lower cavity (2) capable of sealing and closing the mold, wherein an upper bushing (3) is installed in the upper cavity (1), and a lower bushing (4) is installed in the lower cavity (2), and a plurality of mutually connected mounting cavities (5) are formed between the upper bushing (3) and the lower bushing (4); wherein a sealing plate (6) is connected to the top of the upper cavity (1), and a plurality of functional interfaces (7) are provided on the sealing plate (6), wherein a part of the functional interfaces (7) are connected to the interior of the upper cavity (1), and another part of the functional interfaces (7) are connected to at least one of the mounting cavities (5); and a carrier gas interface (8) connected to the interior of the lower cavity (2) is also provided at the bottom.

2. The battery cell airtightness detection chamber according to claim 1, characterized in that: The upper cavity (1) and the lower cavity (2) are both made of stainless steel.

3. The battery cell airtightness detection chamber according to claim 1, characterized in that: The upper bushing (3) and the lower bushing (4) are both made of PET material.

4. The battery cell airtightness detection chamber according to claim 1, characterized in that: The installation cavities (5) are arranged in multiple rows and columns.

5. The battery cell airtightness detection chamber according to claim 1, characterized in that: Each corner of the sealing plate (6) can be supported by a plurality of vertical lifting rods (9) that can be lifted and lowered.

6. The battery cell airtightness detection chamber according to claim 1, characterized in that: At least one sensor (10) is installed outside both sides of the lower cavity (2), and each sensor (10) faces the lower cavity (2) and is higher than the lower cavity (2).

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