A battery shell cover welding detection device

Abstract

The utility model relates to a battery shell cover welding detection device, include: support, driven vertical direction lift connection on the detection cover of support, set up in the detection cover and set up in the detection cover of pneumatic part and air pressure detection sensor, the detection cover bottom is provided with the seal cover, the seal cover top fixedly connected with sealing block, the detection cover bottom is provided with the seal groove that the seal cover enters, sealing block and detection cover dismounting fixed connection, the seal cover bottom surface fixedly connected with sealing ring no.

Description

Technical Field

[0001] This utility model relates to the technical field of battery casing testing equipment, and in particular to a battery casing cover welding testing device. Background Technology

[0002] Traditional battery casing airtightness testing equipment consists of a rigid sealing cover, a pressure transmission mechanism, and a mechanical pressure gauge. Its working principle is as follows: the operator fastens the cast alloy hemispherical sealing cover to the opening of the battery casing, and manually tightens the six spring-loaded clamps around the perimeter to achieve a mechanical seal. A copper air guide tube is installed through the top of the sealing cover, connected to a foot-operated bellows pressurization device. The operator injects air into the sealed cavity by stepping on the bellows lever at a constant frequency, creating a stable air pressure within the cavity. If microscopic cracks exist in the weld seam, gas will continuously leak out through the cracks, causing the pressure gauge pointer to drop in a stepped manner; if the weld is intact, the pressure gauge pointer will remain stationary in the green zone of the scale.

[0003] The limitation of this structure is that the sealing cover adopts a fixed inner diameter design. When testing battery cases of different specifications, the entire sealing assembly needs to be replaced, including the matching buckle clamp, the air duct sealing ring and the matching bellows interface. Utility Model Content

[0004] The purpose of this invention is to solve the problems in the prior art by proposing a battery casing welding inspection device that can inspect battery casings.

[0005] To achieve the above objectives, this utility model proposes a battery casing welding inspection device, comprising: a bracket, a detection cover that is driven to move vertically and is connected to the bracket, an inflation component disposed on the detection cover, and a pressure detection sensor disposed on the detection cover.

[0006] The bottom of the detection cover is provided with a sealing cover, the top of the sealing cover is fixedly connected with a sealing block, the bottom of the detection cover is provided with a sealing groove for the sealing cover to enter, and the sealing block is detachably and fixedly connected to the detection cover.

[0007] A sealing ring is fixedly connected to the bottom surface of the sealing cover. The sealing ring can fit against the external battery cover. Several bolt holes are drilled through the bottom of the sealing cover.

[0008] Preferably, the detection cover is rotatably connected with several bolts, and the sealing block has threaded holes, which are threadedly connected to the bolts.

[0009] Preferably, a positioning post is fixedly connected to the sealing block, and a positioning groove is provided on the detection cover for the positioning post to enter.

[0010] Preferably, a second sealing ring is fixedly connected to the sealing block, and the second sealing ring can adhere to the inner wall of the detection cover.

[0011] Preferably, a positioning ring is fixedly connected to the top surface of the bracket, and the positioning ring is arranged opposite to the detection cover.

[0012] Preferably, the bracket has two clamping blocks that are slidably connected to each other, and the two clamping blocks are arranged opposite to each other.

[0013] Preferably, the clamping block is provided with a plurality of friction grooves arranged in an alternating pattern.

[0014] The beneficial effects of this utility model compared with the prior art are as follows:

[0015] 1. Firstly, the device adopts a modular design with replaceable sealing covers. The use of positioning pins and positioning slots enables rapid and accurate positioning, allowing the testing equipment to flexibly adapt to battery casings of different sizes, significantly improving its versatility. The sealing ring one at the bottom of the sealing cover forms a reliable initial sealing interface with the battery casing cover. Combined with the sealing ring two on the outer wall of the sealing block and the seal on the inner wall of the testing cover, a dual-protection sealing system is constructed, effectively reducing gas leakage during the testing process.

[0016] 2. The vertical lifting and lowering movement of the testing cover is controlled by a cylinder, causing the sealing cover to fit tightly against the battery casing. The clamping blocks on the bracket are driven by a cylinder to move closer to each other, and the friction grooves designed on their surfaces effectively increase the contact friction with the battery casing, ensuring the battery casing remains stable during testing.

[0017] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram showing the position of the threaded hole in this utility model;

[0020] Figure 3 This is a schematic diagram of the position of the positioning groove of this utility model.

[0021] In the diagram: 1. Bracket; 2. Detection cover; 3. Inflatable component; 4. Air pressure sensor; 5. Sealing cover; 6. Sealing block; 7. Sealing groove; 8. Sealing ring one; 9. Bolt hole; 10. Bolt one; 11. Threaded hole; 12. Positioning pin; 13. Positioning groove; 14. Sealing ring two; 15. Positioning ring; 16. Clamping block; 17. Friction groove. Detailed Implementation

[0022] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0024] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0026] like Figures 1 to 3 A battery casing welding inspection device includes: a bracket, an inspection cover that is driven to move vertically and is connected to the bracket, an inflation component disposed on the inspection cover, and a pressure detection sensor disposed on the inspection cover. The inflation component mainly consists of an air inlet pipe and a solenoid valve. The air inlet pipe is connected to an external booster pump and is used to increase the pressure inside the inspection cover. The pressure detection sensor is used to detect the pressure inside the inspection cover.

[0027] Because the bottom of the detection cover is equipped with a sealing cover, and the top of the sealing cover is fixedly connected to a sealing block, and the bottom of the detection cover has a sealing groove for the sealing cover to enter, the sealing block is detachably and fixedly connected to the detection cover, and a sealing ring is fixedly connected to the bottom surface of the sealing cover. This sealing ring can fit against the external battery cover. Several bolt holes are penetrating the bottom of the sealing cover. Therefore, the detection cover driven by the cylinder moves downward and causes the detection cover to bring the sealing cover into contact with the battery case, thus sealing the battery case. Once the battery case is sealed, the air inlet pipe inflates the detection cover, causing the pressure inside the sealing cover to rise. When the pressure rises to a certain value, the air inlet pipe stops inletting air, and the solenoid valve fixedly connected to the air inlet pipe closes. Personnel can check whether the pressure detection sensor has dropped to determine whether the weld on the battery case is sealed. Several bolts are rotatably connected to the detection cover, and the sealing block has threaded holes that are threadedly connected to the bolts. This is a detachable sealing cover, so when the size of the battery case changes, only the sealing cover needs to be replaced.

[0028] Specifically, a positioning post is fixedly connected to the sealing block, and a positioning groove is provided on the detection cover for the positioning post to enter. The positioning groove is used to position the positioning post, thereby achieving the positioning of the sealing block.

[0029] Specifically, a second sealing ring is fixedly connected to the sealing block. The second sealing ring can fit against the inner wall of the detection cover. The second sealing ring is used to increase the sealing effect between the sealing block and the detection cover.

[0030] Specifically, a positioning ring is fixedly connected to the top surface of the bracket. The positioning ring is positioned opposite to the detection cover and is used to position the battery case. Two clamping blocks are slidably connected to the bracket and are positioned opposite each other. Several friction grooves are staggered on the clamping blocks. The clamping blocks are driven by a cylinder, which is fixedly connected to the bracket and has an output shaft fixedly connected to the clamping blocks. This allows the clamping blocks to clamp the battery case. The friction grooves are used to increase the friction between the battery case and the clamping blocks.

[0031] The principle of this invention: This device evaluates the welding quality of the battery casing cover through air pressure sealing test. Its core lies in applying controllable air pressure to the battery casing through the sealed space formed by the test cover and the sealing cover, and judging the weld sealing performance by the pressure changes. When the device is started, the cylinder drives the test cover to move vertically downwards along the support, causing the sealing cover to fit tightly against the pre-positioned battery casing cover. The sealing ring one at the bottom of the sealing cover contacts the battery casing cover to form an initial sealing interface. Simultaneously, the sealing block is precisely aligned with the positioning groove of the test cover via the positioning post, ensuring axial alignment between the sealing cover and the test cover. The sealing ring two on the outer wall of the sealing block contacts the inner wall of the test cover, further enhancing the sealing performance between the two.

[0032] Once the sealing cover is fully compressed against the battery casing, an external booster pump injects gas into the detection cover through the intake pipe, with a solenoid valve controlling the gas flow. As the gas pressure continues to rise, a stable pressure field is formed inside the sealing cover, at which point a pressure sensor monitors the internal pressure value in real time. If the weld is well-sealed, the pressure remains constant; if welding defects exist (such as incomplete welds or weak welds), gas will leak from the weld, causing the pressure sensor reading to drop. Operators can determine the welding quality by observing the pressure change trend.

[0033] To accommodate battery cases of different sizes, the device adopts a modular design: simply replacing the sealing cover allows for matching with new battery cases of different specifications, and the bolts engage with the threaded holes of the sealing blocks for quick assembly and disassembly. Furthermore, the clamping blocks on the bracket are driven to move closer together by a cylinder, and the friction groove design increases friction with the battery case, ensuring the battery case remains in a fixed position during testing.

[0034] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A battery casing welding inspection device, comprising: The system comprises a support (1), a detection cover (2) connected to the support (1) in a vertically movable manner, an inflatable component (3) mounted on the detection cover (2), and a pressure sensor (4) mounted on the detection cover (2), characterized in that: The bottom of the detection cover (2) is provided with a sealing cover (5), and a sealing block (6) is fixedly connected to the top of the sealing cover (5). A sealing groove (7) is opened at the bottom of the detection cover (2) for the sealing cover (5) to enter. The sealing block (6) is detachably and fixedly connected to the detection cover (2). A sealing ring (8) is fixedly connected to the bottom surface of the sealing cover (5). The sealing ring (8) can be attached to the external battery cover. Several bolt holes (9) are penetrated through the bottom of the sealing cover (5).

2. The battery casing welding inspection device according to claim 1, characterized in that, The detection cover (2) is rotatably connected with several bolts (10), and the sealing block (6) is provided with a threaded hole (11), which is threadedly connected to the bolts (10).

3. The battery casing welding inspection device according to claim 2, characterized in that, A positioning post (12) is fixedly connected to the sealing block (6), and a positioning groove (13) is provided on the detection cover (2) for the positioning post (12) to enter.

4. The battery casing welding inspection device according to claim 3, characterized in that, A second sealing ring (14) is fixedly connected to the sealing block (6), and the second sealing ring (14) can adhere to the inner wall of the detection cover (2).

5. The battery casing welding inspection device according to claim 1, characterized in that, The top surface of the bracket (1) is fixedly connected to a positioning ring (15), which is arranged opposite to the detection cover (2).

6. The battery casing welding inspection device according to claim 5, characterized in that, Two clamping blocks (16) are slidably connected to the bracket (1), and the two clamping blocks (16) are arranged opposite to each other.

7. The battery casing welding inspection device according to claim 6, characterized in that, The clamping block (16) is provided with a plurality of friction grooves (17) arranged in an alternating manner.

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