Simulation battery shell tool for lithium battery moisture test

Abstract

The utility model discloses a simulation battery shell tool for lithium battery moisture test, which comprises a shell provided with an accommodating cavity for assembling a roll core; the cover plate is arranged on the shell, and an opening communicated with the accommodating cavity is formed in the cover plate; the connecting structure comprises a connecting belt and a retaining ring, the connecting belt is arranged along the surface of the shell, the two ends of the connecting belt are connected with a retaining seat arranged on the cover plate through the retaining ring, and in the locking process of the retaining ring and the retaining seat, the connecting belt can apply mutual locking force to the shell and the cover plate. The tool is simple in structure, a moisture test battery can be manufactured by imitating a battery shell manufacturing tool through the shell and the cover plate and adding a scrapped roll core, the scrapping of the battery cover plate and an aluminum shell can be effectively reduced, the tool is matched with limiting spaces such as a production line, a logistics line and a clamping jaw, the cover plate and the shell can be locked by matching a connecting belt, a retaining ring and a buckling seat, and the production efficiency is improved. The effect of fastening the cover plate and the shell is achieved, repeated use of the simulation battery tool is achieved, and the loss rate of a normal battery is reduced.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery testing fixture technology, specifically a simulated battery casing fixture for testing the moisture content of lithium batteries. Background Technology

[0002] In the research, development, and production of lithium batteries, moisture control is a crucial step in ensuring battery performance and safety. Before injecting electrolyte, the battery must be baked at high temperatures to remove internal moisture. After baking, the moisture content inside the battery is tested to ensure it meets process standards. The presence of moisture can react with the electrolyte, consuming its effective components and accelerating its decomposition, thus affecting the battery's cycle life and capacity. Simultaneously, moisture can also generate gas inside the battery, leading to increased pressure, battery swelling, and in severe cases, even an explosion risk, threatening production and usage safety.

[0003] Currently, to ensure product quality, a number of batteries are randomly selected from each tray for moisture testing after a certain quantity is produced. Since moisture is primarily reflected in the electrodes, the batteries must be disassembled and the electrodes removed for inspection before testing. This not only causes irreversible damage to the tested batteries but also results in a high scrap rate and material waste. For example, in a lithium battery production workshop that produces 10,000 batteries daily, divided into 100 trays, one battery is randomly selected from each tray for moisture testing. This means that 100 batteries are scrapped daily due to testing, accounting for 1% of the total output, resulting in significant material loss and costs. Therefore, there is a need to develop a simulated battery casing fixture for lithium battery moisture testing. Utility Model Content

[0004] The purpose of this invention is to provide a simulated battery casing fixture for testing the moisture content of lithium batteries, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a simulated battery casing fixture for testing the moisture content of lithium batteries, comprising:

[0006] The housing has a cavity for accommodating the winding core;

[0007] A cover plate, disposed on the housing, having an opening communicating with the receiving cavity; and

[0008] The connecting structure includes a connecting strap and a buckle. The connecting strap is arranged along the surface of the housing, and both ends of the strap are connected to the buckle seat on the cover plate through the buckle. During the locking process of the buckle and the buckle seat, the connecting strap can apply a mutual locking force to the housing and the cover plate.

[0009] As a further embodiment of this utility model, a sealing rubber ring is provided at the periphery of the cover plate near the housing.

[0010] By setting a sealing rubber ring, not only can the sealing between the housing and the cover be effectively guaranteed to prevent gas leakage, but an elastic buffer area can also be formed between the two, thereby avoiding damage to the edges of the housing and the cover due to frequent use.

[0011] As a further embodiment of this utility model: two recessed grooves are provided on the end face of the cover plate near the shell. By setting the two recessed grooves, they correspond exactly to the two cores in the receiving cavity, preventing interference with the tabs when the cover plate and the shell are combined.

[0012] As a further embodiment of this invention, the inner diameter of the two sinkers is adapted to the end of the core, which can ensure that the end of the core can smoothly enter the sinker without being excessively affected by the cover plate.

[0013] As a further embodiment of this utility model: the opening is located in the area between the two sinks. This design can mimic the liquid injection port of an actual lithium battery cover, which facilitates the evaporation and discharge of moisture during the baking process. Moreover, the opening will not come into contact with the core, thus avoiding interference or damage.

[0014] As a further embodiment of this utility model: the number of buckles is two, and both buckles are fixed to the cover plate by bolts. The bolts establish a connection between the cover plate and the buckles to ensure a stable connection between the buckles and the cover plate. In addition, the connection between the buckles and the cover plate can be released by removing the bolts.

[0015] As a further embodiment of this utility model: the connecting strip is arranged in a U-shape along the outer surface of the shell, and the connecting strip is in contact with the shell. By setting the connecting strip as a flexible structure, it can adapt to shells of different shapes, avoiding the problem that it cannot adapt to shells of other sizes due to the fixed shape of the connecting strip.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This application uses a casing and cover plate to create a tooling that mimics a battery casing. By adding scrapped cores, a moisture test battery can be produced. This effectively reduces the scrap of battery cover plates and aluminum casings, and is compatible with production line logistics lines, clamps, and other limited spaces. Furthermore, by using connecting straps, buckles, and fasteners, the cover plate and casing can be locked together to achieve a secure fit. This allows for the reuse of the simulated battery tooling and reduces the loss rate of normal batteries. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the simulated battery casing tooling of this utility model;

[0019] Figure 2 This is a schematic diagram of the assembly of the shell and cover plate of this utility model;

[0020] Figure 3 This is a schematic diagram of the cover plate of this utility model;

[0021] Figure 4 This is a schematic diagram of the buckle of this utility model;

[0022] In the diagram: 1. Housing; 2. Cover plate; 3. Opening; 4. Connecting strap; 5. Buckle; 51. Fixing base; 52. Movable handle; 53. Metal ring; 6. Buckle seat; 7. Sealing rubber ring; 8. Settling groove. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-4 In this embodiment of the invention, a simulated battery casing fixture for testing the moisture content of lithium batteries includes:

[0025] The housing 1 has a cavity for assembling the winding core;

[0026] Cover plate 2, disposed on housing 1, has an opening 3 on it that connects to the receiving cavity; and

[0027] The connecting structure includes a connecting band 4 and a buckle 5. The connecting band 4 is arranged along the surface of the housing 1, and both ends of the band are connected to the buckle seat 6 arranged on the cover plate 2 through the buckle 5. During the locking process of the buckle 5 and the buckle seat 6, the connecting band 4 can apply a mutual locking force to the housing 1 and the cover plate 2.

[0028] Specifically, the housing 1 is made of aluminum and can be directly applied to the production line without additional customization. Its internal cavity is reasonably designed to securely hold the core and facilitate subsequent removal of the core for moisture testing.

[0029] The cover plate 2 is adapted to the opening of the receiving cavity, which can effectively seal the opening of the receiving cavity. The opening 3 is located in the area between the two sinks 8. On the one hand, it can imitate the liquid injection port of the actual lithium battery cover plate, which facilitates the evaporation and discharge of moisture during the baking process. On the other hand, if the cover plate 2 cannot be opened by hand, a long screw can be screwed into the opening 3. After screwing it in a little, the cover plate 2 can be opened by hand with the help of the long screw, and the core of the housing 1 can be taken out for moisture testing.

[0030] The buckle 5 includes a fixed base 51 connected to the end of the connecting belt 4 and a movable handle 52 rotatably connected to the fixed base 51. A metal ring 53 is installed on the movable handle 52. During the movement of the movable handle 52, the metal ring 53 moves up and down synchronously with the movable handle 52. The buckle seat 6 is T-shaped, and the end connected to the metal ring 53 is a hook. When the metal ring 53 enters the upper area of ​​the hook, the metal ring 53 moves down synchronously into the inner area of ​​the hook when the movable handle 52 is pressed down, thereby completing the locking of the buckle 5 and the buckle seat 6. The locking and unlocking principles of the buckle 5 and the buckle seat 6 are existing technologies and will not be elaborated on here. They can be purchased directly from the market.

[0031] Through the above technical solution, after the core is inserted into the receiving cavity of the housing 1, the housing 1 and the cover plate 2 can be assembled by the cooperation of the connecting strap 4, the buckle 5 and the buckle seat 6, thus forming a simulated battery tooling. The tooling can directly replace the normal battery and enter the production line for moisture content testing without disassembling the real battery, avoiding battery scrapping due to testing, reducing the loss rate of normal batteries, and reducing production costs. Moreover, the simulated battery tooling can be repeatedly disassembled and reassembled for multiple cycles.

[0032] Please see Figure 1 In one embodiment, preferably, a sealing rubber ring 7 is provided at the periphery of the cover plate 2 near the housing 1. The sealing rubber ring 7 is tightly fixed at the periphery of the cover plate 2. Similar to the welding process around the battery cover plate, when the cover plate 2 is fastened to the housing 1, the sealing rubber ring 7 will maintain tight contact with the periphery of the housing 1 to prevent gas leakage. In addition, the presence of the sealing rubber ring 7 can also form an elastic buffer area between the housing 1 and the cover plate 2, thereby avoiding damage to the edges of the housing 1 and the cover plate 2 due to frequent use.

[0033] Please see Figure 3 In one embodiment, preferably, two recessed grooves 8 are formed on the end face of the cover plate 2 near the housing 1. The inner diameter of the two recessed grooves 8 is adapted to the end of the core. When the cover plate 2 is fastened to the housing 1, the position of the two recessed grooves 8 on the cover plate 2 corresponds one-to-one with the position of the two cores in the receiving cavity, and the size of the recessed grooves 8 is adapted to the size of the core. This design can ensure that the recessed grooves 8 and the core fit tightly during the assembly process. The depth of the recessed grooves 8 is set according to the height of the core tabs to prevent interference with the tabs when fastening the cover plate 2, thereby ensuring smooth assembly.

[0034] Please see Figure 2In one embodiment, preferably, there are two buckle seats 6. Both buckle seats 6 are fixed to the cover plate 2 by bolts. The bolts establish a connection between the cover plate 2 and the buckle seats 6 to ensure a stable connection between the buckle seats 6 and the cover plate 2. In addition, the connection between the buckle seats 6 and the cover plate 2 can be released by removing the bolts.

[0035] Please see Figure 2 In one embodiment, preferably, the connecting strap 4 is arranged in a U-shape along the outer surface of the housing 1, and the connecting strap 4 is in contact with the housing 1. By setting the connecting strap 4 as a flexible structure, passing the connecting strap 4 through the bottom of the housing 1, and aligning the positions of the two buckles 5 with the two buckle seats 6 on the cover plate 2, the connecting strap 4 is arranged in a U-shape and is in contact with the outer surface of the housing 1. This can adapt to housings 1 of different shapes and avoid the problem that the connecting strap 4 cannot be adapted to housings 1 of other sizes due to its fixed shape.

[0036] The working principle and usage process of this utility model are as follows: First, check whether any parts of the simulated battery casing fixture are damaged and replace any damaged parts. Then, put the scrapped core from the same day's process into the receiving cavity of the casing 1. Next, manually fasten the cover plate 2 and pass the connecting strap 4 through the bottom of the casing 1. Align the positions of the two buckles 5 with the two buckle seats 6 on the cover plate 2. Lock the cover plate 2 and the casing 1 by hooking the metal ring 53 of the buckle 5 onto the hook of the buckle seat 6. Check again whether the cover plate 2 and the casing 1 are securely fitted. If there are no abnormalities, the battery fixture is sent to the baking process. After the battery fixture is baked, remove the buckles 5 and open the cover plate 2. If the cover plate 2 cannot be opened by hand, a long screw can be screwed into the opening 3. After screwing in a short length, use the long screw to open the cover plate 2 by hand. Take out the core of the casing 1 and perform a moisture test. After the test is completed, return the fixture to the previous process for the next test.

[0037] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider 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.

[0038] Therefore, the above description is only a preferred embodiment of this application and is not intended to limit the scope of this application; that is, all equivalent modifications made in accordance with the scope of the claims of this application shall be within the protection scope of the claims of this application.

Claims

1. A simulated battery casing fixture for testing the moisture content of lithium batteries, characterized in that, include: The housing has a cavity for assembling the winding core; A cover plate is disposed on the housing, and the cover plate has an opening that communicates with the receiving cavity; as well as The connecting structure includes a connecting strap and a buckle. The connecting strap is disposed along the surface of the housing, and both ends of the strap are connected to the buckle seat disposed on the cover plate through the buckle. During the locking process of the buckle and the buckle seat, the connecting strap can apply a mutual locking force to the housing and the cover plate.

2. The simulated battery casing fixture for lithium battery moisture testing according to claim 1, characterized in that, A sealing rubber ring is provided at the perimeter of the cover plate near the housing.

3. The simulated battery casing fixture for lithium battery moisture testing according to claim 1, characterized in that, The cover plate has two recessed grooves on its end face near the shell.

4. The simulated battery casing fixture for lithium battery moisture testing according to claim 3, characterized in that, The inner diameter of the two sinkers is adapted to the end of the core.

5. The simulated battery casing fixture for lithium battery moisture testing according to claim 4, characterized in that, The opening is located in the area between the two sinkholes.

6. The simulated battery casing fixture for lithium battery moisture testing according to claim 1, characterized in that, The number of buckles is two, and both buckles are fixed to the cover plate by bolts.

7. The simulated battery casing fixture for lithium battery moisture testing according to claim 1, characterized in that, The connecting strip is arranged in a U-shape along the outer surface of the shell, and the connecting strip is in contact with the shell.

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