Battery upper cover and aluminum shell detection device

Abstract

A battery upper cover and aluminum shell detection device belongs to the technical field of battery production. An aluminum shell limiting block and an aluminum shell limiting column are arranged on the front face of the back plate, the aluminum shell limiting column is connected with a baffle, a water inlet of the water pump is communicated with a water source, a water outlet is communicated with the water inlet end of the water injection pipeline, and the water outlet end of the water injection pipeline is a water injection opening matched with the liquid injection hole. The upper end of the handle is hinged to the upper end of a connecting block arranged in the handle, the lower end of the connecting block is hinged to the middle of an auxiliary block, one end of the auxiliary block is hinged to the mounting base, the other end of the auxiliary block is connected with a pressing block, and the pressing block is matched with a water injection opening. According to the utility model, the pressure endurance capability of the aluminum shell and the upper cover is quantified through the water pressure test, then the pressure endurance capability of raw materials is evaluated, the materials are selected in time, and the stability and the safety of the battery are ensured; meanwhile, the liquid injection hole is sealed through the plugging mechanism, so that leakage point detection and judgment can be conveniently carried out on a battery with poor airtightness, problems are analyzed and solved in time, and the rejection rate is reduced.

Description

Technical Field

[0001] The utility model relates to a detection device for a battery upper cover and an aluminum shell, belonging to the technical field of battery production. Background Technique

[0002] In the production process of lithium-ion batteries, there is no pressure resistance detection for the relevant materials used before welding the battery upper cover and the aluminum shell. If the designed pressure resistance value of the raw materials used is too high, when the internal pressure of the battery rises sharply due to chemical reactions during charging and discharging processes or external factors (such as short circuit, overcharging, etc.), the explosion-proof valves of the aluminum shell and the upper cover may not be able to respond in time and release pressure effectively, resulting in continuous accumulation of the internal pressure of the battery, and ultimately leading to serious safety accidents such as battery spontaneous combustion or explosion; if the designed pressure resistance value of the raw materials used is too low, during the normal use of the battery, even if only due to the generation of a small amount of internal gas or slight external force extrusion, the explosion-proof valves of the battery shell and the upper cover may be opened in advance to release pressure, unable to effectively protect the internal structure of the battery, directly resulting in battery scrapping, increasing production costs and waste.

[0003] In addition, after the welding of the battery upper cover and the aluminum shell is completed, traditional airtightness testing methods mostly adopt underwater inflation tests to detect whether there are air leakage points at the welding joints. On the one hand, tiny air leakage points may be difficult to be directly observed by the naked eye underwater and are easily interfered by the bubbles adsorbed on the surface of the object to be measured, resulting in limited accuracy of the test results; on the other hand, underwater inflation testing is cumbersome in operation, not only increasing the labor intensity of the testers, but also not conducive to the rapid detection requirements of large-scale production lines, reducing production efficiency. Summary of the Utility Model

[0004] To solve the problems in the background technique, the utility model provides a detection device for a battery upper cover and an aluminum shell.

[0005] To achieve the above object, the utility model adopts the following technical solution: a detection device for a battery upper cover and an aluminum shell, including a water injection mechanism, a plugging mechanism, and a limiting mechanism. The limiting mechanism includes an aluminum shell limiting block, an aluminum shell limiting column, a baffle, and a back plate; the upper end of the back plate is provided with a plugging mechanism, the front of the back plate is provided with an aluminum shell limiting block and an aluminum shell limiting column, the end of the aluminum shell limiting column is connected to the baffle, the plugging mechanism is arranged in cooperation with the water injection mechanism, and the water injection mechanism is arranged in cooperation with the limiting mechanism.

[0006] The water injection mechanism includes a water pump and a water injection pipeline; the water inlet of the water pump is communicated with a water source, the water outlet of the water pump is communicated with the water inlet end of the water injection pipeline, the water outlet end of the water injection pipeline is a water injection port, and the water injection port is arranged in cooperation with the liquid injection hole of the upper cover.

[0007] A water pressure gauge is provided at the water inlet end of the water injection pipeline.

[0008] The plugging mechanism includes a pressing block, a handle, a mounting bracket, a mounting seat, a connecting block, and an auxiliary block; the mounting seat is connected to the upper end of the back plate through the mounting bracket, the mounting seat is hinged to the lower end of the handle, the upper end of the handle is hinged to the upper end of the connecting block arranged inside it, the lower end of the connecting block is hinged to the middle of the auxiliary block, one end of the auxiliary block is hinged to the mounting seat, the other end of the auxiliary block is connected to the pressing block, and the pressing block is arranged in cooperation with the water injection port.

[0009] The pressing block is slidably and limit-connected to the other end of the auxiliary block.

[0010] The back plate is provided with a plurality of kidney-shaped holes, and the mounting bracket, the aluminum shell limit block, and the aluminum shell limit post are respectively connected to the back plate through the corresponding kidney-shaped holes.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] The present utility model quantifies the pressure resistance of the aluminum shell and the upper cover through a water pressure test, and then evaluates the pressure resistance of the raw materials, selects materials in time, and ensures the stability and safety of the battery; at the same time, the liquid injection hole is sealed by the plugging mechanism, which is convenient for detecting and judging the leakage points of the battery with poor airtightness, analyzing and solving problems in time, and reducing the rejection rate. Description of the Drawings

[0013] Figure 1 is a schematic structural diagram of the present utility model;

[0014] Figure 2 is Figure 1 the front view of

[0015] Figure 3 is Figure 1 the side view of

[0016] Figure 4 is Figure 1 the top view of

[0017] Figure 5 is a schematic structural diagram of the plugging mechanism. Detailed Embodiments

[0018] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0019] A battery upper cover and aluminum shell detection device, including a water injection mechanism, a plugging mechanism and a limiting mechanism. The limiting mechanism includes an aluminum shell limiting block 11, an aluminum shell limiting column 12, a baffle 13 and a back plate 14. A plugging mechanism is provided at the upper end of the back plate 14, and an aluminum shell limiting block 11 and an aluminum shell limiting column 12 are provided on the front surface of the back plate 14. The end of the aluminum shell limiting column 12 is connected to the baffle 13. The plugging mechanism is arranged in cooperation with the water injection mechanism, and the water injection mechanism is arranged in cooperation with the limiting mechanism.

[0020] The water injection mechanism includes a water pump 2 and a water injection pipe 5. The water inlet 1 of the water pump 2 is communicated with a water source, the water outlet 3 of the water pump 2 is communicated with the water inlet end of the water injection pipe 5, the water outlet end of the water injection pipe 5 is a water injection port 6, and the water injection port 6 is arranged in cooperation with the liquid injection hole of the upper cover.

[0021] The water injection port 6 is screwed and connected with the water injection pipe 5 through a nut, and can be replaced according to different specifications of liquid injection holes to meet the testing of multi-specification products.

[0022] A water pressure gauge 4 is provided at the water inlet end of the water injection pipe 5 to display the current pressure in real time.

[0023] The plugging mechanism includes a pressing block 7, a handle 8, a mounting frame 10, a mounting seat 15, a connecting block 16 and an auxiliary block 17. The mounting seat 15 is connected to the upper end of the back plate 14 through the mounting frame 10. The mounting seat 15 and the lower end of the handle 8 are hinged through a pin shaft. The upper end of the handle 8 and the upper end of the connecting block 16 arranged inside it are hinged through a pin shaft. The lower end of the connecting block 16 and the middle part of the auxiliary block 17 are hinged through a pin shaft. One end of the auxiliary block 17 is hinged to the mounting seat 15 through a pin shaft, and the other end of the auxiliary block 17 is connected to the pressing block 7. The pressing block 7 is arranged in cooperation with the water injection port 6.

[0024] When the pressing block 7 and the handle 8 are in a parallel state, the handle 8 controls the pressing block 7 to move downward through the connecting block 16 and the auxiliary block 17, so that the pressing block 7 performs a pressing movement. When the handle 8 and the pressing block 7 are in a vertical state, the pressing block 7 is in a loosened state.

[0025] The pressing block 7 and the other end of the auxiliary block 17 are connected by a screw for sliding limit.

[0026] A plurality of waist-shaped holes 9 are provided in the back plate 14 through its thickness direction. The mounting frame 10, the aluminum shell limiting block 11 and the aluminum shell limiting column 12 are respectively connected to the back plate 14 through the corresponding waist-shaped holes 9. It is compatible with aluminum shells of different specifications and thicknesses to ensure that the test object has no deviation during the test; at the same time, it is convenient to adjust the position of the plugging mechanism.

[0027] A working method of the battery upper cover and aluminum shell detection device of the present utility model, the method includes the following steps:

[0028] S1: Place the welded aluminum shell and the upper cover between two aluminum shell limit posts 12 and fit them against the aluminum shell limit block 11;

[0029] S2: Adjust the baffle 13 to clamp the welded aluminum shell and the upper cover;

[0030] S3: Align and connect the water injection port 6 of the water injection mechanism with the liquid injection hole of the upper cover;

[0031] S4: Use the pressure block handle 8 of the plugging mechanism to press the pressure block 7 against the water injection port 6 of the water injection mechanism to ensure that the welded aluminum shell and the upper cover being tested do not shift;

[0032] S5: Connect the water inlet 1 of the water pump 2 of the water injection mechanism to a water source;

[0033] S6: Start the water pump 2 of the water injection mechanism, conduct a water pressure test and record the real-time pressure of the water pressure test gauge to confirm the pressure resistance value of the welded aluminum shell and the upper cover.

[0034] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and the present utility model can be implemented in other forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent conditions of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0035] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A battery cover and aluminum shell detection device, characterized in that: The invention comprises a water injection mechanism, a blocking mechanism and a limiting mechanism, wherein the limiting mechanism comprises an aluminum shell limiting block (11), an aluminum shell limiting column (12), a baffle (13) and a back plate (14); the upper end of the back plate (14) is provided with the blocking mechanism, the front side of the back plate (14) is provided with an aluminum shell limiting block (11) and an aluminum shell limiting column (12), the end of the aluminum shell limiting column (12) is connected to the baffle (13), the blocking mechanism is arranged in coordination with the water injection mechanism, and the water injection mechanism is arranged in coordination with the limiting mechanism.

2. A battery cover and aluminum shell detection device according to claim 1, characterized in that: The water injection mechanism comprises a water pump (2) and a water injection pipe (5); the water inlet (1) of the water pump (2) is connected to a water source, the water outlet (3) of the water pump (2) is connected to a water inlet end of the water injection pipe (5), the water outlet end of the water injection pipe (5) is a water injection port (6), and the water injection port (6) is arranged in cooperation with the liquid injection hole of the upper cover.

3. A battery cover and aluminum shell detection device according to claim 2, characterized in that: A water pressure gauge (4) is provided at the water inlet end of the water injection pipeline (5).

4. A battery cover and aluminum shell detection device according to claim 2, characterized in that: The blocking mechanism comprises a pressing block (7), a handle (8), a mounting frame (10), a mounting seat (15), a connecting block (16) and an auxiliary block (17); the mounting seat (15) is connected to the upper end of the back plate (14) through the mounting frame (10); the mounting seat (15) is hinged to the lower end of the handle (8); the upper end of the handle (8) is hinged to the upper end of the connecting block (16) arranged inside the handle; the lower end of the connecting block (16) is hinged to the middle part of the auxiliary block (17); one end of the auxiliary block (17) is hinged to the mounting frame (15); the other end of the auxiliary block (17) is connected to the pressing block (7); and the pressing block (7) is arranged in coordination with the water injection port (6).

5. A battery cover and aluminum shell detection device according to claim 4, characterized in that: The pressing block (7) is connected to the other end of the auxiliary block (17) in a sliding and limiting manner.

6. A battery cover and aluminum shell detection device according to claim 5, characterized in that: The back plate (14) is provided with a plurality of waist-shaped holes (9), and the mounting frame (10), the aluminum shell limiting block (11) and the aluminum shell limiting column (12) are respectively connected to the back plate (14) through corresponding waist-shaped holes (9).

Images