Exhaust device for battery formation and battery formation equipment
By designing the exhaust chamber and coolant storage chamber of the exhaust device, the problem of gaseous electrolyte entering the negative pressure pipeline was solved, realizing electrolyte recovery and improving battery performance, and ensuring the smooth progress of the battery formation process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BATTEROTECH CO LTD
- Filing Date
- 2025-04-15
- Publication Date
- 2026-04-17
AI Technical Summary
During the battery formation process, gaseous electrolyte can easily be drawn into the negative pressure pipeline, affecting the injection effect and, in severe cases, clogging the pipeline and damaging the equipment.
Design an exhaust device including a cup body, an exhaust chamber and a coolant storage chamber. The exhaust chamber is connected to a negative pressure device and a battery. The coolant storage chamber is arranged around the exhaust chamber and uses coolant to condense gaseous electrolyte to prevent it from entering the negative pressure pipeline.
It reduces electrolyte waste, avoids pipe blockage and equipment damage, improves battery performance and production stability, and meets market requirements for battery low-temperature rate performance and long-cycle performance.
Smart Images
Figure CN224138157U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery manufacturing technology, and more specifically, to an exhaust device and battery formation equipment for battery formation. Background Technology
[0002] In the production of aluminum-cased batteries, the formation process plays a crucial role in the final performance of the battery. The formation process typically involves charging the battery with a small current under negative pressure while simultaneously heating the large surface area of the cell. This process forms a stable and dense SEI (solid electrolyte interphase) film at the electrode interface. At the same time, the gas generated by the reaction between the electrolyte and the electrodes is removed, resulting in a lithium battery with acceptable dimensions and stable performance. As the market demands increasingly higher low-temperature rate performance and long-cycle performance, a larger electrolyte injection coefficient is often used to meet these performance requirements. However, with increased electrolyte injection volume, a significant amount of gaseous electrolyte often fails to fully wet the electrodes before the formation process begins. This gaseous electrolyte is easily drawn into the negative pressure pipeline during formation, affecting the electrolyte injection effect and, in severe cases, causing lithium salt crystallization and precipitation in the negative pressure pipeline, clogging the pipeline and damaging the equipment. Utility Model Content
[0003] The purpose of this application is to provide an exhaust device and battery formation equipment for battery formation, which can solve the problem that gaseous electrolyte is easily drawn into negative pressure pipes in the existing battery formation process.
[0004] The embodiments of this application are implemented as follows:
[0005] A first aspect of this application provides an exhaust device for battery formation, comprising a cup body and an exhaust chamber and a coolant storage chamber disposed within the cup body. The opposite ends of the exhaust chamber are respectively connected to a negative pressure device and the interior of a battery, enabling the negative pressure device to extract gas generated by the reaction between the electrolyte and electrodes inside the battery through the exhaust chamber. The coolant storage chamber stores coolant and is disposed around the exhaust chamber to condense the gaseous electrolyte in the exhaust chamber using the coolant within the coolant storage chamber. This exhaust device for battery formation solves the problem of gaseous electrolyte easily being drawn into negative pressure pipes in existing battery formation processes.
[0006] As one possible implementation, the longitudinal cross-sectional shape of the outer wall of the exhaust chamber is straight.
[0007] As one possible implementation, the longitudinal cross-sectional shape of the outer wall of the exhaust chamber is wavy.
[0008] In one possible implementation, the two opposite ends of the exhaust chamber are an exhaust inlet and an exhaust outlet, respectively. The exhaust inlet is used to connect to the inside of the battery, and the exhaust outlet is used to connect to the negative pressure device. The exhaust inlet is located at the bottom of the cup body, and the exhaust outlet is located at the top of the cup body.
[0009] In one possible implementation, the coolant storage chamber has a coolant inlet and a coolant outlet. The coolant inlet is used to connect to a coolant supply device, and the coolant outlet is used to connect to a coolant recovery container. The coolant inlet is located on the side near the bottom of the cup body, and the coolant outlet is located on the side near the top of the cup body.
[0010] In one possible implementation, the cup body includes a first sub-cup body, which has a conical structure and its cross-sectional area gradually increases from the bottom to the top.
[0011] In one possible implementation, the cup body further includes a second sub-cup body located at the top of the first sub-cup body and fixedly connected to the first sub-cup body. The second sub-cup body has a cylindrical structure, and the cross-sectional area of the second sub-cup body is equal from bottom to top.
[0012] As one possible implementation, the first sub-cup body and the second sub-cup body are integrally formed.
[0013] As one possible implementation, the cup body is made of glass or stainless steel.
[0014] A second aspect of this application provides a battery formation apparatus, including the aforementioned venting device for battery formation. This venting device for battery formation solves the problem of gaseous electrolyte easily being drawn into negative pressure pipes in existing battery formation processes.
[0015] The beneficial effects of the embodiments of this application include:
[0016] The exhaust device includes a cup body and an exhaust chamber and a coolant storage chamber disposed within the cup body. The opposite ends of the exhaust chamber are respectively used to connect to the internal parts of the negative pressure device and the battery, so that the negative pressure device can extract the gas generated by the reaction between the electrolyte and the electrodes inside the battery through the exhaust chamber. The coolant storage chamber is used to store coolant and is arranged around the exhaust chamber so that the gaseous electrolyte in the exhaust chamber is condensed by the coolant in the coolant storage chamber. The exhaust device provided in this application, on the one hand, recovers electrolyte that would otherwise be lost by being drawn into the negative pressure pipe through the condensation effect of the coolant on the gaseous electrolyte, reducing electrolyte waste and ensuring sufficient electrolyte inside the battery, which helps improve battery performance; on the other hand, it also prevents the gaseous electrolyte from crystallizing and precipitating lithium salts in the negative pressure pipe, thereby preventing blockage of the negative pressure pipe and equipment damage, reducing equipment maintenance costs, and improving the stability and continuity of the production process; in addition, it effectively improves the battery formation process, ensures the smooth progress of the battery formation process, helps to improve the process capability of battery production, optimize cell design, and meet the market's higher requirements for battery low-temperature rate performance and long cycle performance. Attached Figure Description
[0017] To more clearly illustrate the technical solutions of the embodiments of this application, 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 this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is one of the structural schematic diagrams of the exhaust device provided in the embodiments of this application;
[0019] Figure 2 This is a second schematic diagram of the exhaust device provided in the embodiments of this application.
[0020] Icons: 100 - Exhaust device; 10 - Cup body; 11 - First sub-cup body; 12 - Second sub-cup body; 20 - Exhaust chamber; 21 - Exhaust inlet; 22 - Exhaust outlet; 30 - Coolant storage chamber; 31 - Coolant inlet; 32 - Coolant outlet. Detailed Implementation
[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.
[0022] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. These terms are used only for the convenience of describing this application and for 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. Furthermore, the terms "horizontal," "vertical," etc., do not indicate that the component must be absolutely horizontal or suspended, but can be slightly tilted. The terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0023] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0024] In the battery formation process, the electrolyte reacts with the electrodes to produce gas, and some of the electrolyte vaporizes into a gaseous state. In existing technologies, the gaseous electrolyte is easily drawn into negative pressure pipelines, which can have many adverse effects, such as affecting the electrolyte injection effect. In severe cases, lithium salts may crystallize and precipitate in the negative pressure pipelines, thereby clogging the pipelines and damaging the equipment.
[0025] To solve the above problems, please refer to the following: Figure 1 and Figure 2This application provides an exhaust device 100 for battery formation, including a cup body 10 and an exhaust chamber 20 and a coolant storage chamber 30 disposed within the cup body 10. The opposite ends of the exhaust chamber 20 are respectively connected to a negative pressure device and the interior of the battery, allowing the negative pressure device to extract the gas generated by the reaction between the electrolyte and electrodes inside the battery through the exhaust chamber 20. The coolant storage chamber 30 stores coolant and is arranged around the exhaust chamber 20 to condense the gaseous electrolyte in the exhaust chamber 20 using the coolant within the coolant storage chamber 30. This exhaust device 100 for battery formation solves the problem of gaseous electrolyte easily being drawn into the negative pressure pipe in existing battery formation processes.
[0026] It should be noted that, as Figure 1 and Figure 2 As shown, the exhaust device 100 includes a cup body 10, an exhaust chamber 20, and a coolant storage chamber 30. The cup body 10 serves as the outer shell of the entire exhaust device 100, containing and protecting the internal structure, and is the basic framework of the exhaust device 100. The exhaust chamber 20, located within the cup body 10, is a key channel for gas exhaust during battery formation. The opposite ends of the exhaust chamber 20 are connected to a negative pressure device and the inside of the battery, respectively. When the negative pressure device is activated, it creates a negative pressure environment within the exhaust chamber 20, using the pressure difference to extract the gas generated by the reaction between the electrolyte and electrodes inside the battery. The coolant storage chamber 30... The storage chamber 30 is located inside the cup body 10. From a spatial layout perspective, the coolant storage chamber 30 surrounds the exhaust chamber 20. The coolant storage chamber 30 is used to store coolant so that the gaseous electrolyte in the exhaust chamber 20 can be condensed by the coolant. Specifically, when the negative pressure device extracts gas from inside the battery, the gaseous electrolyte in the coolant is at a low temperature. When it passes through the exhaust chamber 20, it will exchange heat with the outer wall of the exhaust chamber 20 (or the inner wall of the coolant storage chamber 30). The gaseous electrolyte will condense into liquid when it cools down, thereby realizing the recovery of the gaseous electrolyte.
[0027] During the battery formation process, the electrolyte inside the battery reacts with the electrodes. Due to the suction of the negative pressure device, the gas produced by the reaction and the vaporized electrolyte enter the exhaust chamber 20 together. This gas and vaporized electrolyte flow towards the end of the exhaust chamber 20 connected to the negative pressure device. During this process, the coolant storage chamber 30 surrounding the outside of the exhaust chamber 20 plays a role. The coolant continuously absorbs heat from the exhaust chamber 20, lowering the temperature of the gaseous electrolyte. The gaseous electrolyte then turns back into a liquid state and flows back into the battery, thereby reducing the amount of gaseous electrolyte entering the negative pressure pipe.
[0028] Compared to existing technologies, the exhaust device 100 provided in this application, on the one hand, utilizes the condensation effect of the coolant on the gaseous electrolyte to recover electrolyte that would otherwise be lost by being drawn into the negative pressure pipe, reducing electrolyte waste and ensuring sufficient electrolyte inside the battery, which helps improve battery performance; on the other hand, it also prevents the gaseous electrolyte from crystallizing and precipitating lithium salts in the negative pressure pipe, thereby preventing blockage of the negative pressure pipe and equipment damage, reducing equipment maintenance costs, and improving the stability and continuity of the production process; in addition, it effectively improves the battery formation process, ensuring the smooth progress of the battery formation process, helping to improve the process capability of battery production, optimize cell design, and meet the market's higher requirements for battery low-temperature rate performance and long cycle performance.
[0029] As one possible implementation method, such as Figure 1 As shown, in some embodiments, the longitudinal cross-sectional shape of the outer wall of the exhaust chamber 20 is straight.
[0030] It should be noted that, as Figure 1 As shown, in some embodiments, the longitudinal section of the outer wall of the exhaust chamber 20 is straight, meaning that when viewed from the side, the outer wall outline of the exhaust chamber 20 appears as a straight line, resulting in a relatively simple and regular structure. The straight outer wall makes the gas flow path within the exhaust chamber 20 relatively simple and direct, reducing resistance during gas flow and enabling smoother extraction of gas and vaporized electrolyte generated inside the battery. Simultaneously, the simple structure makes device maintenance and cleaning more convenient, reducing maintenance costs.
[0031] In the actual battery formation venting device 100, this linear design makes manufacturing relatively easy, allowing for the use of more conventional processing techniques, such as injection molding or bending and welding of metal sheets, resulting in lower manufacturing costs. Furthermore, this shape facilitates internal layout and allows for easy assembly with other components, such as the coolant storage chamber 30.
[0032] As one possible implementation method, such as Figure 2 As shown, in some other embodiments, the longitudinal cross-sectional shape of the outer wall of the exhaust chamber 20 is wavy.
[0033] It should be noted that, as Figure 2As shown, in some embodiments, the longitudinal section of the outer wall of the exhaust chamber 20 is wavy, meaning that the outer wall profile of the exhaust chamber 20 appears wavy when viewed from the side. This wavy design significantly increases the heat exchange area between the exhaust chamber 20 and the coolant storage chamber 30. When the gaseous electrolyte flows within the exhaust chamber 20, it has more opportunities to exchange heat with the coolant storage chamber 30, thereby improving condensation efficiency. In practical applications, the amplitude and frequency of the waves can be adjusted according to different battery formation requirements to achieve the best condensation effect.
[0034] The corrugated outer wall significantly improves the condensation effect on gaseous electrolyte, enabling more effective recovery of vaporized electrolyte, further reducing electrolyte loss, and improving battery performance and quality. Furthermore, the increased heat exchange area allows for more efficient utilization of the coolant's cooling effect, reducing the required coolant volume and conserving resources.
[0035] As one possible implementation method, such as Figure 1 and Figure 2 As shown, the two opposite ends of the exhaust chamber 20 are an exhaust inlet 21 and an exhaust outlet 22, respectively. The exhaust inlet 21 is used to connect with the inside of the battery, and the exhaust outlet 22 is used to connect with the negative pressure device. The exhaust inlet 21 is located at the bottom of the cup body 10, and the exhaust outlet 22 is located at the top of the cup body 10.
[0036] It should be noted that, as Figure 1 and Figure 2 As shown, the exhaust chamber 20 has an exhaust inlet 21 and an exhaust outlet 22 at opposite ends. The exhaust inlet 21 is used to connect to the inside of the battery; for example, the exhaust inlet 21 can be equipped with a nozzle to connect to the battery's electrolyte filling hole. The exhaust inlet 21 is located at the bottom of the cup body 10. The exhaust outlet 22 is used to connect to a negative pressure device and is located at the top of the cup body 10. During operation, the negative pressure device is activated, creating a negative pressure environment within the exhaust chamber 20. Due to the pressure difference, the gas generated by the reaction between the electrolyte and electrodes inside the battery, as well as the vaporized electrolyte, enter the exhaust chamber 20 from the exhaust inlet 21 at the bottom and are then extracted through the exhaust outlet 22 at the top.
[0037] This layout utilizes the upward movement of gas and vaporized electrolyte. During battery formation, the gas and vaporized electrolyte produced by the reaction naturally flow upwards where the pressure is lower, aligning with the layout of the exhaust inlet 21 and exhaust outlet 22 of the exhaust chamber 20, making the extraction process smoother. Furthermore, the bottom-intake and top-exhaust method helps reduce gas residue within the exhaust chamber 20, ensuring effective exhaust.
[0038] This layout design efficiently removes reactive gases and vaporized electrolyte from inside the battery, preventing gas accumulation and ensuring a smoother formation process. Furthermore, it prevents the discharged gases from flowing back into the battery, maintaining a stable internal environment and improving battery quality and performance.
[0039] As one possible implementation method, such as Figure 1 and Figure 2 As shown, the coolant storage chamber 30 has a coolant inlet 31 and a coolant outlet 32. The coolant inlet 31 is used to connect to a coolant supply device, and the coolant outlet 32 is used to connect to a coolant recovery container. The coolant inlet 31 is located on the side near the bottom of the cup body 10, and the coolant outlet 32 is located on the side near the top of the cup body 10.
[0040] It should be noted that, as Figure 1 and Figure 2 As shown, the coolant storage chamber 30 has a coolant inlet 31 and a coolant outlet 32. The coolant inlet 31 is used to connect to a coolant supply device and is located on the side near the bottom of the cup body 10. The coolant outlet 32 is used to connect to a coolant recovery container and is located on the side near the top of the cup body 10. During operation, the coolant flows in from the bottom, flows within the coolant storage chamber 30, absorbs heat from the gaseous electrolyte in the exhaust chamber 20, and then flows out from the top.
[0041] The bottom-inflow, top-outflow design conforms to the principle of heat exchange. As the coolant flows upward from the bottom, its temperature gradually increases, forming a good temperature gradient with the gradually decreasing gaseous electrolyte in the exhaust chamber 20, continuously exchanging heat and improving condensation efficiency. Furthermore, this layout allows for more uniform distribution of coolant within the storage chamber, preventing localized overheating or undercooling.
[0042] Through the above layout design, the circulating flow of coolant can continuously and effectively condense the gaseous electrolyte in the exhaust chamber 20, converting it into liquid and allowing it to flow back into the battery, thus reducing electrolyte loss. Furthermore, the recycling of coolant lowers operating costs and improves resource utilization.
[0043] As one possible implementation method, such as Figure 1 and Figure 2 As shown, the cup body 10 includes a first sub-cup body 11, which has a conical structure. The cross-sectional area of the first sub-cup body 11 gradually increases from the bottom to the top.
[0044] It should be noted that, as Figure 1 and Figure 2As shown, the first sub-cup 11 is cone-shaped, with its cross-sectional area gradually increasing from the bottom to the top. In the exhaust device 100, this shape alters the flow path and spatial distribution of gas and electrolyte within the cup 10. The smaller cross-section at the bottom facilitates the collection of gas and electrolyte discharged from the battery, while the gradually increasing cross-section provides more space for subsequent processing.
[0045] In practical applications, this conical structure helps guide the flow and collection of the electrolyte. When the gas and vaporized electrolyte generated by the reaction between the electrolyte and the electrodes inside the battery enter the first sub-cup 11 from the bottom, the gas flow rate slows down as the space gradually increases. This facilitates the condensation of the gaseous electrolyte and the aggregation of the liquid electrolyte. At the same time, the conical inner wall also allows the aggregated electrolyte to flow more smoothly down the wall, reducing the amount of electrolyte adhering to the cup wall.
[0046] Through the above structural design, on the one hand, the recovery efficiency of electrolyte can be improved, and the loss of electrolyte during the exhaust process can be reduced by guiding and converging the electrolyte; on the other hand, the treatment effect of gas is also enhanced, the gas flow rate is slowed down, and better conditions are created for the condensation of gaseous electrolyte, thereby improving the performance of the entire exhaust device 100.
[0047] As one possible implementation method, such as Figure 1 and Figure 2 As shown, the cup body 10 also includes a second sub-cup body 12 located at the top of the first sub-cup body 11 and fixedly connected to the first sub-cup body 11. The second sub-cup body 12 has a cylindrical structure, and the cross-sectional area of the second sub-cup body 12 is equal from the bottom to the top.
[0048] It should be noted that, as Figure 1 and Figure 2 As shown, the second sub-cup 12 has a cylindrical structure and is located on top of and fixedly connected to the first sub-cup 11. The cylindrical second sub-cup 12 has a stable cross-sectional area, which complements the conical structure of the first sub-cup 11. In the entire exhaust device 100, the first sub-cup 11 is mainly responsible for the initial collection and treatment of gas and electrolyte, while the second sub-cup 12 undertakes the function of further processing and guiding gas discharge.
[0049] The cylindrical second sub-cup 12 provides a stable flow channel for the gas, allowing the gas processed by the first sub-cup 11 to be discharged more orderly. Simultaneously, the second sub-cup 12 also serves as a buffer zone, further separating any remaining gaseous electrolyte. Due to its regular structure, it is also easier to connect to other components, such as negative pressure equipment.
[0050] The above structural design combines the advantages of both conical and cylindrical shapes, improving the overall performance of the exhaust device 100. Specifically, the conical structure of the first sub-cup 11 optimizes electrolyte collection and condensation, while the cylindrical structure of the second sub-cup 12 ensures stable gas discharge. Working together, these two components enhance the exhaust device 100's ability to handle gases and electrolytes generated during battery formation, further improving battery production quality and efficiency.
[0051] As one possible implementation method, such as Figure 1 and Figure 2 As shown, the first sub-cup 11 and the second sub-cup 12 are integrally formed structures. In terms of manufacturing process, injection molding, die casting, and other technologies can be used to achieve this integral molding. This manufacturing method ensures that there are no obvious seams between the two sub-cup bodies 10, forming a complete and continuous cup body 10 structure.
[0052] As one possible implementation method, such as Figure 1 and Figure 2 As shown, the cup body 10 is made of glass or stainless steel.
[0053] Taking glass as an example, the glass cup 10 has high chemical stability, which can effectively resist the corrosion of electrolyte and extend the service life of the cup 10; its transparency makes it easy to observe the internal situation, which helps to adjust the process parameters in time and improve the controllability of the production process; the smooth surface reduces the residue of electrolyte, improves the electrolyte recovery efficiency, and thus improves the production quality of the battery.
[0054] Taking the stainless steel material of the cup body 10 as an example, the cup body 10 made of it has excellent corrosion resistance, which enables it to be used stably for a long time in the harsh environment of battery formation; the high strength and toughness ensure the structural reliability of the cup body 10 and reduce damage caused by external forces; the good thermal conductivity improves the condensation effect, which is conducive to the recovery of gaseous electrolyte and improves the efficiency and quality of battery production.
[0055] This application also provides a battery formation apparatus, including the aforementioned exhaust device 100 for battery formation. Since the structure and beneficial effects of the exhaust device 100 for battery formation have been described in detail in the foregoing embodiments, they will not be repeated here.
[0056] The above description is merely an optional embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
[0057] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this application will not describe the various possible combinations separately.
Claims
1. An exhaust device for battery formation, characterized by, The device includes a cup body and an exhaust chamber and a coolant storage chamber disposed within the cup body. The opposite ends of the exhaust chamber are respectively used to connect to the internal parts of a negative pressure device and a battery, so that the negative pressure device can extract the gas generated by the reaction between the electrolyte and the electrodes inside the battery through the exhaust chamber. The coolant storage chamber is used to store coolant and is disposed around the exhaust chamber so that the gaseous electrolyte in the exhaust chamber is condensed by the coolant in the coolant storage chamber.
2. The venting device for battery formation according to claim 1, characterized in that, The longitudinal cross-sectional shape of the outer wall of the exhaust chamber is straight.
3. The exhaust apparatus for battery formation according to claim 1, characterized by, The longitudinal cross-sectional shape of the outer wall of the exhaust chamber is wavy.
4. The exhaust apparatus for battery formation according to claim 1, characterized by, The two opposite ends of the exhaust chamber are an exhaust inlet and an exhaust outlet, respectively. The exhaust inlet is used to connect to the inside of the battery, and the exhaust outlet is used to connect to the negative pressure device. The exhaust inlet is located at the bottom of the cup body, and the exhaust outlet is located at the top of the cup body.
5. The exhaust apparatus for battery formation according to claim 1, characterized by, The coolant storage chamber has a coolant inlet and a coolant outlet. The coolant inlet is used to connect to a coolant supply device, and the coolant outlet is used to connect to a coolant recovery container. The coolant inlet is located on the side near the bottom of the cup body, and the coolant outlet is located on the side near the top of the cup body.
6. The exhaust apparatus for battery formation according to claim 1, wherein The cup body includes a first sub-cup body, which has a conical structure and the cross-sectional area of the first sub-cup body gradually increases from the bottom to the top.
7. The exhaust apparatus for battery formation according to claim 6, characterized by The cup body also includes a second sub-cup body located at the top of the first sub-cup body and fixedly connected to the first sub-cup body. The second sub-cup body has a cylindrical structure, and the cross-sectional area of the second sub-cup body is equal from bottom to top.
8. The venting device for battery formation according to claim 7, characterized in that, The first sub-cup body and the second sub-cup body are integrally formed.
9. The exhaust apparatus for battery formation according to claim 1, characterized by, The cup body is made of glass or stainless steel.
10. A battery formation apparatus characterized by comprising: Includes the exhaust device for battery formation as described in any one of claims 1 to 9.