Steel shell cylindrical battery short circuit test liquid injection integrated processing method

Abstract

The application provides a steel shell cylindrical battery short circuit test and liquid injection integrated processing method. The method comprises the following steps: sending the baked battery cell into a cooling device to perform a cooling operation, to obtain a cooled battery cell; inputting the cooled battery cell into a vacuum box, using a short circuit test mechanism to perform a short circuit test operation on the battery cell, to obtain a qualified battery semi-finished product; using a liquid injection mechanism to perform a liquid injection operation on the qualified battery semi-finished product, to obtain a battery after liquid injection; wherein the short circuit test operation and the liquid injection operation are both performed in the vacuum box. By arranging the short circuit test mechanism and the liquid injection mechanism in the vacuum box, the short circuit test operation and the liquid injection operation are both performed in the vacuum box, that is, the short circuit test and liquid injection of the battery are integrated, the battery cell is prevented from being exposed to a low dew point environment, the risk of water absorption of the battery cell is effectively reduced, and the performance of the battery is improved.

Description

Technical Field

[0001] This invention relates to the technical field of battery production, and in particular to an integrated method for short-circuit testing and electrolyte injection of steel-cased cylindrical batteries. Background Technology

[0002] Currently, steel-cased cylindrical batteries are widely used in many mobile devices in industrial and civilian fields due to their advantages such as high energy density, small size, and long service life. During the production process, assembled cells need to be baked in an oven to remove moisture and improve battery performance. After baking, the cells need to be injected with electrolyte. Before electrolyte injection, a short-circuit test is required to reduce potential safety risks and avoid ineffective electrolyte loss.

[0003] However, existing short-circuit testing of battery cells involves manually testing each cell individually using a short-circuit tester. This exposes the cells to a low dew point environment for too long, causing the electrode plates to absorb moisture. After absorbing the moisture, the cells are then placed in a vacuum chamber for electrolyte injection, ultimately resulting in poor battery performance. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an integrated liquid injection treatment method for short-circuit testing of steel-cased cylindrical batteries that can effectively reduce the risk of cell absorbing moisture and thus improve battery performance.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] A method for integrated short-circuit testing and electrolyte injection for steel-cased cylindrical batteries is disclosed, employing an integrated short-circuit testing and electrolyte injection device. This device includes a cooling unit and an injection unit. The injection unit comprises a vacuum chamber, a short-circuit testing mechanism, and an injection mechanism, both installed within the vacuum chamber. The method comprises the following steps: feeding a baked battery cell into the cooling unit for cooling to obtain a cooled battery cell; inputting the cooled battery cell into the vacuum chamber; performing a short-circuit test on the battery cell within the vacuum chamber using the short-circuit testing mechanism to obtain a qualified battery semi-finished product; and injecting electrolyte into the qualified battery semi-finished product using the injection mechanism to obtain an electrolyte-injected battery. Both the short-circuit test and the electrolyte injection are performed within the vacuum chamber.

[0007] In one embodiment, the integrated short-circuit test liquid injection device further includes a baking device, which is connected in sequence to the cooling device and the liquid injection device.

[0008] In one embodiment, before the step of sending the baked battery cell into the cooling device for cooling to obtain the cooled battery cell, the integrated treatment method for short-circuit testing of steel-cased cylindrical batteries further includes the following step: placing the assembled battery cell into the baking device for baking to obtain the baked battery cell.

[0009] In one embodiment, after the short-circuit test is performed on the cells in the vacuum chamber using the short-circuit test mechanism, and before the step of obtaining a qualified battery semi-finished product, the integrated treatment method for short-circuit testing and electrolyte injection of steel-cased cylindrical batteries further includes the following step: marking the unqualified battery semi-finished products after the short-circuit test and discharging them from the vacuum chamber.

[0010] In one embodiment, the integrated short-circuit test liquid injection device further includes a conveying mechanism, which includes a first conveying end and a second conveying end connected in sequence. The first conveying end is located inside the cooling device, and the second conveying end is located inside the vacuum chamber.

[0011] In one embodiment, the short-circuit testing mechanism includes a support, a guide rail, a short-circuit testing platform, a first moving component, a second moving component, and a testing component. The two ends of the support are connected to the inner walls of both ends of the vacuum chamber. The guide rail is mounted on the support. The first moving component is slidably connected to the guide rail and is used to load the steel-cased cylindrical battery to be tested onto the short-circuit testing platform. The second moving component is slidably connected to the guide rail. The testing component includes a cap detection component and a steel-casing detection component. The cap detection component is located at the power output end of the second moving component, and the second moving component is used to drive the cap detection component to move until it abuts against the cap of the steel-cased cylindrical battery during a short-circuit test, thus electrically connecting the cap detection component to the cap. The steel-casing detection component is located on the short-circuit testing platform and is used to abut against the outer wall of the steel casing of the steel-cased cylindrical battery during a short-circuit test, thus electrically connecting the steel-casing detection component to the steel casing.

[0012] In one embodiment, the short-circuit test mechanism further includes a cover protection component, which includes a first protective member and a second protective member. The first protective member is used to cover the contacts of the cap test member after the cap test member has completed the short-circuit test, and the second protective member is used to cover the contacts of the steel shell test member after the steel shell test member has completed the short-circuit test.

[0013] In one embodiment, the first moving component includes a first sliding plate, a first transmission member, and a first loading robot. The first sliding plate is slidably connected to the guide rail, the first transmission member passes through the first sliding plate and is movably connected to the first loading robot, and the first loading robot has a clamping groove for clamping the steel-cased cylindrical battery. The second moving component includes a second sliding plate, a second transmission member, and a second loading robot. The second sliding plate is slidably connected to the guide rail, the second transmission member passes through the second sliding plate and is movably connected to the second loading robot, and the second loading robot is provided with the cap detection member.

[0014] In one embodiment, the detection component further includes a cylinder disposed on the second loading robot, the cap detection component includes two cap testing probes, and two cylinder clamps are disposed opposite to each other on the cylinder, each cylinder clamp being slidably connected to the cylinder so that each cylinder clamp moves toward one end of the cap of the steel-cased cylindrical battery, and each cylinder clamp is provided with one cap testing probe.

[0015] In one embodiment, after the step of using the liquid injection mechanism to perform liquid injection on the qualified battery semi-finished product to obtain the liquid-injected battery, the integrated liquid injection treatment method for short-circuit testing of steel-cased cylindrical batteries further includes the following step: sealing the liquid-injected battery.

[0016] Compared with the prior art, the present invention includes, but is not limited to, the following advantages:

[0017] By incorporating a short-circuit testing mechanism and a liquid injection mechanism within the vacuum chamber, both short-circuit testing and liquid injection operations are performed within the vacuum chamber. This achieves an integrated setup for battery short-circuit testing and liquid injection, preventing the battery cells from being exposed to a low dew point environment. This effectively reduces the risk of the battery cells absorbing moisture, thereby improving battery performance.

[0018] 2. By installing a cooling device between the baking device and the liquid injection device, the connection problem between the baking device and the liquid injection device is solved, preventing the battery cells from absorbing water in low dew point air, thereby ensuring the performance of the battery. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1This is a flowchart of an integrated liquid injection treatment method for short-circuit testing of a steel-cased cylindrical battery in one embodiment;

[0021] Figure 2 This is a schematic diagram of the integrated short-circuit test liquid injection device in one embodiment;

[0022] Figure 3 for Figure 2 The diagram shows the structure of the short-circuit testing mechanism in the integrated short-circuit testing liquid injection device. Detailed Implementation

[0023] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0024] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0026] This application provides an integrated short-circuit testing and electrolyte injection method for steel-cased cylindrical batteries, using an integrated short-circuit testing and electrolyte injection device. The integrated short-circuit testing and electrolyte injection device includes a cooling device and an injection device. The injection device includes a vacuum chamber, a short-circuit testing mechanism, and an injection mechanism, both of which are installed inside the vacuum chamber. The integrated short-circuit testing and electrolyte injection method for steel-cased cylindrical batteries includes the following steps: feeding a baked battery cell into the cooling device for cooling to obtain a cooled battery cell; inputting the cooled battery cell into the vacuum chamber; performing a short-circuit test on the battery cell inside the vacuum chamber using the short-circuit testing mechanism to obtain a qualified battery semi-finished product; and performing an electrolyte injection operation on the qualified battery semi-finished product using the injection mechanism to obtain an electrolyte-injected battery. Both the short-circuit testing operation and the electrolyte injection operation are performed inside the vacuum chamber. The cooling system lowers the temperature of the battery cells, preventing electrolyte vaporization during electrolyte injection in the vacuum chamber and thus reducing electrolyte loss, ensuring battery performance. After cooling, the cells are placed in the vacuum chamber and undergo a short-circuit test. Cells that pass the test are considered qualified semi-finished batteries, reducing the safety risks of short circuits and preventing unnecessary electrolyte loss. The qualified semi-finished batteries then undergo electrolyte injection, allowing the electrolyte to penetrate the cells and ensuring battery performance. By incorporating both the short-circuit testing and electrolyte injection mechanisms within the vacuum chamber, the short-circuit testing and injection processes are integrated, preventing the cells from being exposed to low dew point environments and effectively reducing the risk of moisture absorption, thereby improving battery performance.

[0027] To better understand the technical solution and beneficial effects of this application, the following detailed description is provided in conjunction with specific embodiments:

[0028] Please see Figure 1 This is a flowchart of an embodiment of the integrated short-circuit testing and electrolyte injection method for steel-cased cylindrical batteries according to the present invention. The integrated short-circuit testing and electrolyte injection method for steel-cased cylindrical batteries includes some and all of the following steps:

[0029] S100: The baked battery cell is sent to the cooling device for cooling to obtain a cooled battery cell.

[0030] In this embodiment, in step S100, the baked battery cell is immediately fed into the cooling device while still hot via the first conveyor line. The space inside the cooling device is isolated from the external space, and dry cooling air is continuously introduced into the cooling device to continuously flush the baked battery cell. Further, the baked battery cell is immediately fed into the cooling device while still hot via the first conveyor line in a sealed, negative pressure environment; more preferably, the exhaust air that flushes the baked battery cell in the cooling device is connected to the first conveyor line to flush the battery cell immediately after it exits the baking device, resulting in greater energy savings.

[0031] It should be specifically explained that the baked battery cells in the technical solution disclosed in this case are different from those that are conventionally sent directly to the short-circuit test equipment via transmission lines or battery transfer boxes. Existing technology will cause the exposed cooling of the battery cells to cause secondary air and water absorption, while the integrated short-circuit test liquid injection equipment in this case will not cause this problem.

[0032] In this embodiment, since the assembled battery cell contains moisture, it needs to be baked to remove the moisture. Understandably, the surface temperature of the battery cell is higher after baking. When the battery cell is injected with electrolyte in a vacuum chamber, the higher the temperature under vacuum, the easier it is to reach the boiling point. Therefore, directly introducing a high-temperature battery cell into the vacuum chamber can easily cause electrolyte vaporization, resulting in electrolyte loss. Therefore, after the battery cell has been baked to remove moisture, the high-temperature battery cell is introduced into a cooling device. The cooling operation of the cooling device lowers the temperature of the battery cell, thereby preventing electrolyte vaporization during electrolyte injection in the vacuum chamber, reducing electrolyte loss, and ensuring battery performance.

[0033] S200: Input the cooled battery cell into the vacuum chamber.

[0034] In this embodiment, the cooled battery cell can be transferred from the cooling device into the vacuum chamber via a second conveyor line in a sealed and negative pressure environment.

[0035] S300: The short-circuit test mechanism is used to perform a short-circuit test on the cells inside the vacuum chamber to obtain a qualified battery semi-finished product.

[0036] In this embodiment, since the battery cells undergo baking and cooling operations before entering the vacuum chamber, it is understood that the separator may shrink due to excessively high temperatures during baking, potentially causing a short circuit. Furthermore, the cooling operation may also damage the battery cells. Therefore, after the cooled battery cells are introduced into the vacuum chamber, they need to undergo a short-circuit test. Cells that pass the short-circuit test are considered qualified battery semi-finished products. This reduces the safety risks associated with battery short circuits and avoids unnecessary electrolyte loss.

[0037] S400: The liquid injection mechanism is used to inject liquid into the qualified battery semi-finished product to obtain the liquid-injected battery.

[0038] In this embodiment, after the battery undergoes a short-circuit test, a qualified battery semi-finished product is obtained. Then, the qualified battery semi-finished product is injected with electrolyte to allow the electrolyte to seep into the battery cell, thereby ensuring the battery's performance.

[0039] Please refer to the following: Figure 2 The integrated short-circuit test liquid injection method for steel-cased cylindrical batteries is performed using an integrated short-circuit test liquid injection device 10. The integrated short-circuit test liquid injection device 10 includes a cooling device 100 and a liquid injection device 200. The liquid injection device 200 includes a vacuum chamber 210, a short-circuit test mechanism 220, and a liquid injection mechanism 230. Both the short-circuit test mechanism 220 and the liquid injection mechanism 230 are installed inside the vacuum chamber 210. The short-circuit test operation and the liquid injection operation are both performed inside the vacuum chamber 210.

[0040] After the step of inputting the cooled battery cell into the vacuum chamber 210 and performing a short-circuit test using the short-circuit test mechanism 220 to obtain a qualified battery semi-finished product, the integrated treatment method for short-circuit testing and electrolyte injection of steel-cased cylindrical batteries further includes: covering and protecting the detection component 226 of the short-circuit test mechanism 220.

[0041] In the above embodiment, by providing a short-circuit testing mechanism 220 and a liquid injection mechanism within the vacuum chamber 210, both the short-circuit testing and liquid injection operations are performed within the vacuum chamber 210. This achieves an integrated setup for battery short-circuit testing and liquid injection, thus avoiding the cell being exposed to a low dew point environment, effectively reducing the risk of the cell absorbing moisture, and thereby improving battery performance. Since the vacuum chamber 210 is also used for liquid injection operations, it is understandable that the detection component 226 of the short-circuit testing mechanism 220, being exposed to the vacuum chamber 210 for extended periods, is susceptible to electrolyte corrosion. Therefore, after the detection component 226 completes the short-circuit test, it is immediately covered for protection to reduce the risk of electrolyte corrosion, thereby extending the service life of the detection component 226, avoiding frequent replacements, and improving the efficiency of battery short-circuit testing.

[0042] In one embodiment, please refer to Figure 2 The integrated short-circuit test and liquid injection device 10 also includes a baking device 300, which is sequentially connected to the cooling device 100 and the liquid injection device 200. In this embodiment, the baking device is sequentially connected to the cooling device 100 and the liquid injection device 200. Thus, the battery cell, after baking, can be sent to the cooling device 100 for cooling. After cooling, the battery cell is then sent to the vacuum chamber 210 to sequentially complete the short-circuit test and liquid injection operations. It is understood that the temperature in the baking device is high, while the temperature in the liquid injection device 200 is low. Traditional technology cannot connect the baking device and the liquid injection device 200, causing the baked battery cell to be exposed to low dew point air when input into the liquid injection device 200, easily leading to water absorption and affecting battery performance. However, in this embodiment, by providing a cooling device 100 between the baking device and the liquid injection device 200, the connection problem between the baking device and the liquid injection device 200 is solved, preventing the battery cell from absorbing water in low dew point air, thereby ensuring battery performance.

[0043] Furthermore, before the step of sending the baked battery cell into the cooling device for cooling to obtain the cooled battery cell, the integrated short-circuit test and electrolyte injection method for steel-cased cylindrical batteries further includes the following step: placing the assembled battery cell into the baking device for baking to obtain the baked battery cell. In this embodiment, the assembled battery cell is baked by the baking device to remove moisture from the battery cell, thereby improving battery performance.

[0044] In one embodiment, after performing a short-circuit test on the cells inside the vacuum chamber using the short-circuit test mechanism, and before obtaining a qualified battery semi-finished product, the integrated short-circuit test and electrolyte injection method for steel-cased cylindrical batteries further includes the following step: marking and discharging the unqualified battery semi-finished products from the vacuum chamber after the short-circuit test. In this embodiment, unqualified battery semi-finished products are detected after the short-circuit test. To avoid injecting electrolyte into the unqualified battery semi-finished products, they need to be discharged from the vacuum chamber to prevent useless loss of electrolyte. Furthermore, the vacuum chamber is provided with a battery outlet to discharge the unqualified battery semi-finished products.

[0045] In one embodiment, the integrated short-circuit test liquid injection device further includes a conveying mechanism. The conveying mechanism comprises a first conveying end and a second conveying end connected in sequence. The first conveying end is located within the cooling device, and the second conveying end is located within the vacuum chamber. In this embodiment, by setting up the conveying mechanism and connecting the first and second conveying ends, it can be understood that the battery in the cooling device is placed at the first conveying end, and the cooled battery cell is input from the first conveying end to the second conveying end, and then enters the vacuum chamber for the next liquid injection operation.

[0046] In one embodiment, please refer to Figure 3 The short-circuit testing mechanism 220 includes a support 221, a guide rail 222, a short-circuit testing platform 223, a first moving component 224, a second moving component 225, and a testing component 226. The two ends of the support 221 are connected to the inner walls of both ends of the vacuum chamber (not shown). The guide rail 222 is mounted on the support 221. The first moving component 224 is slidably connected to the guide rail 222 and is used to load the steel-cased cylindrical battery to be tested onto the short-circuit testing platform 223. The second moving component 225 is slidably connected to the guide rail 222. The testing component 226... 6 includes a cap detection component 2261 and a steel shell detection component 2262. The cap detection component 2261 is disposed at the power output end of the second moving component 225, and the second moving component 225 is used to drive the cap detection component 2261 to move until it abuts against the cap of the steel shell cylindrical battery during a short circuit test, so that the cap detection component 2261 is electrically connected to the cap. The steel shell detection component 2262 is disposed on the short circuit test platform, and the steel shell detection component 2262 is used to abut against the outer wall of the steel shell of the steel shell cylindrical battery during a short circuit test, so that the steel shell detection component 2262 is electrically connected to the steel shell.

[0047] In this embodiment, a guide rail 222 is provided on the bracket 221. The first moving component 224 and the second moving component 225 slide on the guide rail 222. Specifically, a steel shell detection component 2262 is provided on the short-circuit test platform. The first moving component 224 is used to first transfer the steel shell cylindrical battery to the short-circuit test platform and electrically connect the steel shell of the steel shell cylindrical battery to the steel shell detection component 2262. Then, the first moving component 224 is returned to its original position. Then, the second moving component 225 moves the cap detection component 2261 to the cap position of the steel shell cylindrical battery and electrically connects the cap detection component 2261 to the cap of the steel shell cylindrical battery. In this way, the detection component 226 performs a short-circuit test on the steel shell cylindrical battery. In the short-circuit test process for the steel shell cylindrical battery, manual short-circuit testing is avoided, reducing the input of human resources, improving testing efficiency, and thus increasing battery production capacity.

[0048] In one embodiment, the short-circuit testing mechanism further includes a cover protection component, which comprises a first protective member and a second protective member. The first protective member is used to cover the contacts of the cap-type detector after the cap-type detector completes the short-circuit test, and the second protective member is used to cover the contacts of the steel-casing detector after the steel-casing detector completes the short-circuit test. In this embodiment, the testing component includes a cap-type detector and a steel-casing detector. It is understood that after the short-circuit test, if the contacts of the cap-type detector and the steel-casing detector are exposed to the vacuum chamber for a long time, they are easily corroded by the electrolyte. Therefore, a cover protection component is provided on the short-circuit testing mechanism. Specifically, the first protective member covers the contacts of the cap-type detector after the cap-type detector completes the short-circuit test, and the second protective member covers the contacts of the steel-casing detector after the steel-casing detector completes the short-circuit test. This reduces the risk of the testing component being corroded by the electrolyte, thereby increasing the service life of the testing component, avoiding frequent replacement of the testing component, and improving the efficiency of battery short-circuit testing. Furthermore, the first protective component is a first silicone sleeve, and the second protective component is a second silicone sleeve. It can be understood that the vacuum chamber is a glove box visible in conventional technology. When the integrated short-circuit test liquid injection device stops working, the operator can reach inside the vacuum chamber through gloves and place the first silicone sleeve over the cap-type test component to cover and protect the contacts of the cap-type test component. Similarly, the second silicone sleeve is used to cover the steel-shell test component.

[0049] In one embodiment, please refer to Figure 3The first moving component 224 includes a first sliding plate 2241, a first transmission member 2242, and a first loading robot 2243. The first sliding plate 2241 is slidably connected to the guide rail 222. The first transmission member 2242 passes through the first sliding plate 2241 and is movably connected to the first loading robot 2243. The first loading robot 2243 has a clamping groove for clamping the steel-cased cylindrical battery. The second moving component 225 includes a second sliding plate 2251, a second transmission member 2252, and a second loading robot 2253. The second sliding plate 2251 is slidably connected to the guide rail 222. The second transmission member 2252 passes through the second sliding plate 2251 and is movably connected to the second loading robot 2253. The second loading robot 2253 is provided with the cap detection member 2261.

[0050] In this embodiment, since both the first sliding plate 2241 and the second sliding plate 2251 are slidably connected to the guide rail 222, both the first moving component 224 and the second moving component 225 can move along the guide rail 222 on the bracket 221. Specifically, in the first moving component 224, since the first transmission member 2242 passes through the first sliding plate 2241 and is connected to the first loading robot 2243, the sliding of the first sliding plate 2241 on the guide rail 222 causes the first transmission member 2242 and the first loading robot 2243 to move horizontally to directly above the steel-cased cylindrical battery. The first loading robot 2243 has a clamping groove (not shown). Since the first loading robot 2243 moves on the first transmission member 2242, it can be moved to the position of the steel-cased cylindrical battery and use the clamping groove to clamp the steel-cased cylindrical battery. Then, the first moving component 224 moves the battery again. The process involves placing a cylindrical steel-cased battery on the short-circuit testing platform 223 and electrically connecting the steel casing of the battery to the steel casing testing component 2262. In the second moving assembly 225, since the cap testing component 2261 is located on the second loading robot 2253, the cap testing component 2261 can be moved to the position of the cap of the cylindrical steel-cased battery by moving the second sliding plate 2251 and cooperating with the movement of the second loading robot 2253 on the second transmission component 2252. At this time, the cap testing component 2261 is electrically connected to the cap of the cylindrical steel-cased battery, and the steel casing testing component 2262 is electrically connected to the steel casing of the cylindrical steel-cased battery. Thus, the short-circuit test is performed on the cylindrical steel-cased battery using the testing assembly 226.

[0051] In one embodiment, the detection component further includes a cylinder mounted on the second loading robot. The cap detection component includes two cap testing probes. Two cylinder clamps are disposed opposite to each other on the cylinder, each cylinder clamp being slidably connected to the cylinder to move towards one end of the cap of the steel-cased cylindrical battery. Each cylinder clamp is provided with one cap testing probe. In this embodiment, the second loading robot transfers the two cap testing probes to both ends of the cap of the steel-cased cylindrical battery, and the two cap testing probes are respectively disposed on the two cylinder clamps. Through the action of the cylinder, the two cylinder clamps move towards each other and clamp the cap of the steel-cased cylindrical battery, making the two cap testing probes electrically connected to the cap of the steel-cased cylindrical battery.

[0052] In one embodiment, after the step of injecting electrolyte into the qualified battery semi-finished product using the electrolyte injection mechanism to obtain the electrolyte-injected battery, the integrated electrolyte injection and short-circuit testing method for steel-cased cylindrical batteries further includes the following step: sealing the electrolyte-injected battery. Thus, by sealing the electrolyte-injected battery, spillage of electrolyte from the battery during transportation is prevented, avoiding unnecessary loss of electrolyte.

[0053] Compared with the prior art, the present invention includes, but is not limited to, the following advantages:

[0054] 1. By incorporating a short-circuit testing mechanism and a liquid injection mechanism within the vacuum chamber, both short-circuit testing and liquid injection operations are performed within the vacuum chamber. This achieves an integrated setup for battery short-circuit testing and liquid injection, preventing the battery cells from being exposed to a low dew point environment, effectively reducing the risk of the battery cells absorbing moisture, and thus improving battery performance.

[0055] 2. By installing a cooling device between the baking device and the liquid injection device, the connection problem between the baking device and the liquid injection device is solved, preventing the battery cells from absorbing water in low dew point air, thereby ensuring the performance of the battery.

[0056] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A method for integrated electrolyte injection for short-circuit testing of steel-cased cylindrical batteries, characterized in that, The short-circuit test liquid injection integrated equipment is used. The short-circuit test liquid injection integrated equipment includes a cooling device and a liquid injection device. The liquid injection device includes a vacuum chamber, a short-circuit test mechanism and a liquid injection mechanism. The short-circuit test mechanism and the liquid injection mechanism are both installed in the vacuum chamber. The integrated short-circuit test electrolyte injection method for steel-cased cylindrical batteries includes the following steps: The baked battery cell is sent into the cooling device for cooling to obtain a cooled battery cell. The cooled battery cell is then fed into the vacuum chamber. The short-circuit testing mechanism is used to perform short-circuit testing on the cells inside the vacuum chamber to obtain qualified battery semi-finished products. The liquid injection mechanism is used to inject liquid into the qualified battery semi-finished product to obtain the liquid-injected battery; Both the short-circuit test and the liquid injection operation are performed inside the vacuum chamber. After the step of performing short-circuit testing on the cells inside the vacuum chamber using the short-circuit testing mechanism to obtain qualified battery semi-finished products, the integrated treatment method for short-circuit testing and electrolyte injection of steel-cased cylindrical batteries further includes: covering and protecting the detection components of the short-circuit testing mechanism. After performing a short-circuit test on the cells inside the vacuum chamber using the short-circuit test mechanism, and before obtaining a qualified battery semi-finished product, the integrated short-circuit test and electrolyte injection method for steel-cased cylindrical batteries further includes the following steps: Battery semi-finished products that fail the short-circuit test are marked and removed from the vacuum chamber.

2. The integrated treatment method for short-circuit testing of steel-cased cylindrical batteries according to claim 1, characterized in that, The integrated short-circuit test liquid injection device also includes a baking device, which is connected in sequence to the cooling device and the liquid injection device.

3. The integrated treatment method for short-circuit testing of steel-cased cylindrical batteries according to claim 2, characterized in that, Before the step of sending the baked battery cell into the cooling device for cooling to obtain the cooled battery cell, the integrated short-circuit test and electrolyte injection method for steel-cased cylindrical batteries further includes the following steps: The assembled battery cells are placed in the baking device for baking to obtain the baked battery cells.

4. The integrated treatment method for short-circuit testing of steel-cased cylindrical batteries according to claim 1, characterized in that, The vacuum chamber is equipped with a battery outlet.

5. The integrated treatment method for short-circuit testing of steel-cased cylindrical batteries according to claim 1, characterized in that, The integrated short-circuit test liquid injection device also includes a conveying mechanism, which includes a first conveying end and a second conveying end connected in sequence. The first conveying end is located inside the cooling device, and the second conveying end is located inside the vacuum chamber.

6. The integrated treatment method for short-circuit testing of steel-cased cylindrical batteries according to claim 1, characterized in that, The short-circuit testing mechanism includes a support, a guide rail, a short-circuit testing platform, a first moving component, a second moving component, and a testing component. Both ends of the support are connected to the inner walls of both ends of the vacuum chamber. The guide rail is mounted on the support. The first moving component is slidably connected to the guide rail and is used to load the steel-cased cylindrical battery to be tested onto the short-circuit testing platform. The second moving component is slidably connected to the guide rail. The testing component includes a cap detection component and a steel-casing detection component. The cap detection component is located at the power output end of the second moving component, and the second moving component is used to drive the cap detection component to move until it abuts against the cap of the steel-cased cylindrical battery during the short-circuit test, thus electrically connecting the cap detection component to the cap. The steel-casing detection component is located on the short-circuit testing platform and is used to abut against the outer wall of the steel casing of the steel-cased cylindrical battery during the short-circuit test, thus electrically connecting the steel-casing detection component to the steel casing.

7. The integrated treatment method for short-circuit testing of steel-cased cylindrical batteries according to claim 6, characterized in that, The short-circuit testing mechanism further includes a cover protection component, which includes a first protective component and a second protective component. The first protective component is used to cover the contacts of the cap test component after the cap test component completes the short-circuit test, and the second protective component is used to cover the contacts of the steel shell test component after the steel shell test component completes the short-circuit test.

8. The integrated treatment method for short-circuit testing of steel-cased cylindrical batteries according to claim 6, characterized in that, The first moving component includes a first sliding plate, a first transmission component, and a first loading robot. The first sliding plate is slidably connected to the guide rail. The first transmission component passes through the first sliding plate and is movably connected to the first loading robot. The first loading robot has a clamping groove for clamping the steel-cased cylindrical battery. The second moving component includes a second sliding plate, a second transmission component, and a second loading robot. The second sliding plate is slidably connected to the guide rail. The second transmission component passes through the second sliding plate and is movably connected to the second loading robot. The second loading robot is equipped with the cap detection component.

9. The integrated treatment method for short-circuit testing of steel-cased cylindrical batteries according to claim 8, characterized in that, The detection component also includes a cylinder, which is mounted on the second loading robot. The cap detection component includes two cap probes. Two cylinder clamps are arranged opposite each other on the cylinder. Each cylinder clamp is slidably connected to the cylinder so that each cylinder clamp moves toward one end of the cap of the steel-cased cylindrical battery. Each cylinder clamp is provided with one cap probe.

10. The integrated treatment method for short-circuit testing of steel-cased cylindrical batteries according to claim 1, characterized in that, After the step of using the liquid injection mechanism to perform liquid injection on the qualified battery semi-finished product to obtain the liquid-injected battery, the integrated liquid injection treatment method for short-circuit testing of steel-cased cylindrical batteries further includes the following steps: The battery is then sealed after being filled with electrolyte.

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