Novel battery welding seam sealing detection device

Abstract

The utility model discloses a novel battery weld joint sealing detection device, which comprises a lower cavity and a sealing strip, a mounting groove is arranged at the top of the lower cavity along the length direction, a plurality of clamping strips are fixedly connected in the mounting groove along the length direction, a mounting gap is arranged between two adjacent clamping strips, and the sealing strip is arranged in the mounting groove. According to the utility model, through the arrangement of the square sealing strip, the multi-section groove on the lower cavity and the arrangement of the plurality of clamping strips in the mounting groove, the lower cavity with the multi-section groove design is formed, and the positions and lengths of the clamping strips are adaptively designed according to blade battery cover plates with different models; the sealing strips with appropriate lengths are selected to be clamped into the multiple clamping strips for fixing the sealing strips, the sealing strips with different models are replaced according to different tested blade battery cover plate products, the testing device can be adapted to testing of blade battery cover plates with various models, and the model changing time is greatly shortened.

Description

Technical Field

[0001] This utility model relates to the field of battery weld seal detection technology, specifically a novel battery weld seal detection device. Background Technology

[0002] The airtightness of a power battery has a significant impact on its safety. To ensure the airtightness of the battery, repeated airtightness tests are required during the battery casing production process.

[0003] Sealing technology is mainly used for airtightness testing of weld seams in blade battery casings. Sealing strips are used to seal the upper and lower cavities for helium permeation testing. Currently, the sealing strips of helium detectors on the market are generally standard O-rings, with the annular sealing strips embedded in the grooves of the upper and lower cavities.

[0004] During the helium testing process, the battery cover is first placed in the simulated cantilever cavity, the upper cavity is pressed down, and the annular sealing strip is squeezed to form a seal. Helium is then filled into the upper material cavity through one side cavity via a helium filling device. After the helium filling operation is completed and maintained for a period of time, the helium content in the other side cavity is detected by a helium detector.

[0005] Experiments revealed that due to the curved edges of the O-ring seal, it cannot fit tightly against the product during the pressing and sealing process of the upper and lower cavities, resulting in a large blind zone at both ends of the tested product and affecting the accuracy of the test results.

[0006] Furthermore, most of the cavities on the market are single-groove designs, which are only compatible with a single product model. If it is necessary to test different models of battery casings, different models of cavities must be replaced to adapt to the products. This process is time-consuming and costly. Therefore, there is an urgent need to design a new type of battery weld seal testing device to solve the above problems. Utility Model Content

[0007] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a novel battery weld seal inspection device. Through the setting of a square sealing strip and a multi-segment groove on the lower cavity, the multi-segment groove can be adapted to fix square sealing strips of different lengths, and can be adapted to test various types of blade battery cover plates, greatly reducing the changeover time.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A novel battery weld seal inspection device includes a lower cavity and a sealing strip. The lower cavity has a mounting groove along its length at its top. Multiple locking strips are fixedly connected within the mounting groove along its length, with a mounting gap between adjacent locking strips. A locking through groove is formed at the center of the sealing strip. The sealing strip is placed within the mounting groove and secured by the locking strips locking into the locking through groove. A chamber is provided inside the lower cavity, and the mounting groove communicates with the chamber through a through hole. An air inlet communicating with the chamber is provided on one side of the lower cavity.

[0010] As a preferred embodiment of this utility model, the sealing strip has a square ring design and is made of non-stick rubber material.

[0011] In a preferred embodiment of this utility model, the length of the sealing strip is greater than the length of the product to be tested.

[0012] As a preferred embodiment of this utility model, both ends of the locking groove of the sealing strip are provided with inward guide openings.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention utilizes a square sealing strip and a multi-segmented groove on the lower cavity. Multiple locking strips within these grooves form the multi-segmented groove design of the lower cavity. The position and length of the locking strips are designed to adapt to different models of blade battery covers. A sealing strip of appropriate length is inserted into the multiple locking strips for secure sealing. By replacing the sealing strips with different models of those used in testing different blade battery cover products, this invention can adapt to various blade battery cover models, significantly reducing changeover time. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a new type of battery weld seal inspection device.

[0016] In the diagram: 1. Lower cavity; 2. Mounting groove; 3. Air inlet; 4. Sealing strip. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0018] Example: Please refer to Figure 1This embodiment provides a novel battery weld seal inspection device, including a lower cavity 1 and a sealing strip 4. The lower cavity 1 has a mounting groove 2 along its length at its top. Multiple locking strips are fixedly connected along the length of the mounting groove 2, with an installation gap between adjacent locking strips. A locking groove is formed at the center of the sealing strip 4. The sealing strip 4 is placed in the mounting groove 2 and locked in place by the locking strips into the locking groove. A chamber is provided inside the lower cavity 1, and the mounting groove 2 communicates with the chamber through a through hole. An air inlet 3 communicating with the chamber is provided on one side of the lower cavity 1. The lower cavity 1 is installed on a helium detector. During helium testing, the sealing strip 4 is embedded in the mounting groove 2, and the lower cavity 1 is moved to contact the blade battery cover, causing the sealing strip 4 to press against the outside of the blade battery cover to form a seal. Then, helium gas enters the chamber of the lower cavity 1 through the air inlet 3. Helium is injected into the mounting groove 2. After helium injection, the groove is maintained for a period of time, and then the helium content is detected. The helium leakage rate is calculated to achieve the effect of helium detection. Multiple locking strips are set in the mounting groove 2 to form a multi-segment groove design lower cavity. The position and length of the locking strips are designed to adapt to different models of blade battery covers. A sealing strip 4 of appropriate length is selected and inserted into multiple locking strips for fixing the sealing strip 4. By changing the sealing strip 4 of different models of blade battery cover products being tested, it is possible to adapt to the testing of multiple models of blade battery cover, which greatly reduces the changeover time. For example, a short sealing strip 4 can be fixed on one locking strip, a longer sealing strip 4 can be fixed on two adjacent locking strips, and an even longer sealing strip 4 can be fixed on three adjacent locking strips to achieve quick replacement and fixing of different models of sealing strip 4.

[0019] In this embodiment, the sealing strip 4 has a square ring design and is made of non-stick rubber material, such as fluororubber, silicone rubber, neoprene rubber, butyl rubber, etc. The length of the sealing strip 4 is greater than the length of the product to be tested. Both ends of the slot of the sealing strip 4 are provided with inward guide openings. The size of the sealing strip 4 is customized according to the battery cover model. The surface is smooth and flat, which makes it easy for the sealing strip 4 to be embedded into the installation groove 2. With the lower cavity 1, the sealing strip 4 is squeezed to form a sealing effect. Since the square ring design of the sealing strip 4 can better match the weld of the aluminum shell of the blade battery, the sealing strip 4 is slightly longer than the product to be tested. The product falls in the middle of the square sealing strip 4, with part of the sealing strip 4 exposed on both sides, which greatly reduces the blind spot of weld inspection.

[0020] The manufacturing method of the square sealing strip is as follows: customize a more regular square mold; inject anti-stick rubber into the square mold; demold to obtain the square sealing strip.

[0021] The manufacturing method of the lower cavity with multi-segment grooves is as follows: customize a longer lower cavity; design matching grooves on the upper part of the lower cavity according to different battery cover models; process and produce a lower cavity with multiple grooves.

[0022] The novel battery weld seal detection device provided by this utility model has the following advantages compared with the prior art:

[0023] Good adaptability: Most new energy batteries on the market are square in shape. The square sealing strip has a high degree of fit with the square sealing parts and can be well applied to square workpieces or equipment interfaces. Its side length tolerance is controlled within ±0.5mm and its thickness tolerance is controlled within ±0.2mm, which can ensure the accuracy and stability of the seal. For square helium detection chambers and other components, the inward guide design of the square sealing strip can be tightly embedded in the installation groove, effectively preventing helium leakage. The multi-segment groove design of the lower chamber can also adapt to the testing of different models of products. Only by changing the sealing strip according to the different products can the testing effect be achieved.

[0024] Easy to install: Compared to ring-shaped sealing strips, square sealing strips have a regular shape and are relatively easy to install, saving installation time and labor costs. Operators can install them into the groove of the lower cavity more quickly, improving work efficiency.

[0025] Uniform stress distribution: During the helium testing process, the sealing strip is compressed. The square sealing strip can evenly distribute the pressure, so that the entire sealing surface can obtain a good sealing effect, which helps to improve the accuracy of the test results and reduce the risk of helium leakage caused by uneven pressure.

[0026] Lower cost: Square sealing strips are relatively easy to design and manufacture, and have a high material utilization rate. Therefore, their manufacturing cost is usually lower than that of some special-shaped sealing strips. This can effectively reduce costs for companies that need to use sealing strips on a large scale.

[0027] Highly customizable: The size and material of the square sealing strip can be customized according to different usage needs. For example, different sizes can be selected according to different battery cover models to adapt to various complex working environments.

[0028] Improved sealing stability: The square sealing strip is made of non-stick material, which can effectively reduce the material sticking to the sealing strip during equipment operation, ensure the sealing performance of the helium detector, prevent helium leakage, and thus ensure the accuracy of the test results;

[0029] Enhanced equipment lifespan: The use of anti-stick material reduces the risk of equipment failure due to material sticking to the sealing strip, improves the overall reliability and stability of the helium detector, reduces maintenance costs and downtime, and extends its service life.

[0030] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A novel battery weld seam seal detection device characterized by: Including lower cavity (1) and seal bar (4), the lower cavity (1) top is provided with installation recess (2) along the length direction, a plurality of clamping position strips are fixedly connected in the installation recess (2) along the length direction, installation gap is arranged between the adjacent two clamping position strips, the seal bar (4) is provided with clamping position through slot in the center, the seal bar (4) is placed in the installation recess (2) and is clamped and fixed by being clamped into the clamping position through slot, the lower cavity (1) is provided with chamber inside, the installation recess (2) is communicated with the chamber by through-hole, the lower cavity (1) one side is provided with air inlet (3) communicated with the chamber.

2. A novel battery weld seam seal detection device as claimed in claim 1, characterized by: The seal bar (4) is square ring design, the seal bar (4) adopts the rubber material of anti-sticking material.

3. A novel battery weld seam seal detection device as claimed in claim 2, characterized in that: The length of the seal bar (4) is greater than the length of the product to be detected.

4. A novel battery weld seam seal detection device as claimed in claim 3, characterized in that: The clamping position through slot of the seal bar (4) is provided with inward guide opening at both ends. The clamping position through slot of the seal bar (4) is provided with inward guide opening at both ends.

Images