Exhaust device for battery formation and battery formation equipment

Abstract

The utility model relates to the technical field of battery manufacturing, and provides an exhaust device for battery formation and battery formation equipment. The exhaust device for battery formation comprises a first exhaust pipeline, a second exhaust pipeline and a third exhaust pipeline, wherein one end of the first exhaust pipeline is used for being communicated with a liquid injection hole of a battery monomer; the rotational flow part is arranged in the first exhaust pipeline and located on the side, close to the battery single bodies, of the first exhaust pipeline, the rotational flow part is connected with the inner wall face of the first exhaust pipeline, the rotational flow part is provided with a spiral flow channel, and the spiral flow channel is used for guiding a fluid medium to spirally flow in the first exhaust pipeline; and the at least one flow blocking piece is arranged in the first exhaust pipeline and is used for being arranged on the side, deviating from the battery monomers, of the rotational flow piece. According to the technical scheme provided by the invention, the loss of the electrolyte in the battery formation process can be reduced, so that the use performance of the battery monomer can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery manufacturing, and in particular to an exhaust device and battery formation equipment for battery formation. Background Art

[0002] Battery formation is to charge and discharge the battery after filling, and form a solid electrolyte interface film on the surface of the electrode assembly to prevent the redox reaction between the electrolyte and the electrode active material, so as to ensure the electrochemical stability of the battery cell. In the formation process, there will be gas generation. In order to prevent the battery cell from bloating after formation, an exhaust device is generally used to release the gas to the greatest extent.

[0003] In the related art, during the exhaust process of the exhaust device, the gas is discharged from the gas pipe and the electrolyte inside the battery cell is taken out, causing the loss of the electrolyte inside the battery cell, thereby causing the battery performance to decline. Utility Model Content

[0004] The purpose of the present application is to provide an exhaust device and battery formation equipment for battery formation, so as to improve the problem that the electrolyte is discharged with the gas during the battery formation process, resulting in a reduction of electrolyte inside the battery cell and affecting the battery performance. This purpose is achieved through the following technical solutions:

[0005] In a first aspect, the present application provides an exhaust device for battery formation, comprising: a first exhaust line, one end of which is used to communicate with the injection hole of a battery cell; a swirl member, arranged in the first exhaust line and located on a side of the first exhaust line close to the battery cell, the swirl member is connected to the inner wall surface of the first exhaust line, and the swirl member is provided with a spiral flow channel, and the spiral flow channel is used to guide the fluid medium to spirally flow in the first exhaust line; at least one baffle member, arranged in the first exhaust line, and used to be arranged on a side of the swirl member away from the battery cell.

[0006] According to the exhaust device for battery formation provided by the present application, a swirl component is arranged in the first exhaust line, and the swirl component is located on the side of the first exhaust line close to the battery cell. When the battery is exhausted during formation, the gas carries the electrolyte into the first exhaust line from the injection hole and flows in a spiral along the spiral flow channel defined by the swirl component. The spiral flow channel plays a role of guiding the flow. In the process of gas and electrolyte flowing in the spiral flow channel, due to the effect of inertia, the electrolyte and gas can be separated under the effect of inertia, and the separated electrolyte is discharged. The liquid flows toward the inner wall of the first exhaust pipe and can adhere to the inner wall of the first exhaust pipe, while the gas further flows along the spiral flow channel and is discharged. In addition, since at least one blocking member is provided at the end of the spiral flow channel, the at least one blocking member can block the electrolyte remaining in the spiral flow channel, thereby further reducing the discharge of the electrolyte. In this way, when the formation enters a static state, the electrolyte can flow back into the battery cell, thereby improving the loss of the electrolyte during the battery formation process and helping to improve the performance of the battery cell.

[0007] In addition, the exhaust device for battery formation provided by the present application may also have the following additional technical features:

[0008] In some embodiments of the present application, the swirl member includes a connecting rod and a spiral guide vane, the spiral guide vane is arranged around the outer peripheral side of the connecting rod and connected to the inner wall surface of the first exhaust pipe, and the spiral flow channel is defined between the spiral guide vane and the connecting rod.

[0009] The connecting rod serves to support and connect the spiral guide vanes. The spiral guide vanes extend spirally around the outer circumference of the connecting rod, thereby defining a spiral flow channel between the connecting rod and the spiral guide vanes. The spiral guide vanes have a simple structure and are easy to process and form. By connecting the spiral guide vanes to the inner wall surface of the first exhaust pipe, the reliability of the installation of the swirl component in the first exhaust pipe can be improved.

[0010] In some embodiments of the present application, the connecting rod is coaxially arranged with the first exhaust pipe.

[0011] By arranging the connecting rod coaxially with the first exhaust pipe, not only the overall structure of the product is more regular, but also the uniformity of gas-liquid separation of the electrolyte and the gas can be improved, which helps to make the electrolyte evenly adhere to the inner wall surface of the first exhaust pipe and helps to improve the reflux efficiency of the electrolyte.

[0012] In some embodiments of the present application, the spiral flow channel has an inlet end and an outlet end, the inlet end is located on a side of the swirl element away from the baffle element, and the outlet end is arranged corresponding to the baffle element.

[0013] After the gas and electrolyte enter the first exhaust pipe through the injection hole, they can enter the spiral flow channel from the inlet end. Most of the electrolyte can adhere to the inner wall surface of the first exhaust pipe under the action of centrifugal force, and the gas and the remaining electrolyte continue to flow along the spiral flow channel and are discharged from the outlet end. Since at least one baffle is arranged corresponding to the outlet end, the at least one baffle can be used to further baffle the electrolyte, thereby further reducing the loss of the electrolyte.

[0014] In some embodiments of the present application, there are multiple baffles, and the multiple baffles are arranged at intervals along the axial direction of the first exhaust pipe.

[0015] By setting the number of the blocking members to be multiple, the electrolyte can be blocked multiple times by using the multiple blocking members, thereby further reducing the loss of the electrolyte.

[0016] In some embodiments of the present application, the baffle is arranged to be inclined from top to bottom along one end connected to the inner wall surface of the first exhaust pipe to the other end.

[0017] By adopting the above-mentioned setting method, the flow-blocking member can facilitate the electrolyte to flow back into the battery cell under the action of gravity when the electrolyte is formed and left to stand. The structure and principle are relatively simple and easy to implement.

[0018] In some embodiments of the present application, the exhaust device also includes a formation cup, which is used to be arranged between the first exhaust line and the battery cell. The formation cup has a accommodating cavity, which is connected to the first exhaust line and is used to communicate with the injection hole of the battery cell.

[0019] By arranging a formation cup between the first exhaust line and the battery cell, the formation cup is connected with the interior of the battery cell and the first exhaust line, so that it can collect the electrolyte refluxed in the first exhaust line, and it is convenient to reflow the refluxed electrolyte to the interior of the battery cell, which helps to improve the formation efficiency.

[0020] In some embodiments of the present application, at least one filter is provided in the accommodating cavity.

[0021] By arranging a filter in the accommodating cavity, the filter can allow the gas to pass through and flow to the first exhaust pipe, and can filter and block the electrolyte discharged from the battery cell, thereby further reducing the loss of the electrolyte.

[0022] In some embodiments of the present application, the exhaust device further includes a second exhaust pipeline, and the second exhaust pipeline is connected to the other end of the first exhaust pipeline.

[0023] The second exhaust pipeline is connected to the first exhaust pipeline and is used to guide the gas in the first exhaust pipe out, thereby achieving the purpose of exhaust gas.

[0024] In some embodiments of the present application, there are multiple first exhaust pipes, and the multiple first exhaust pipes are arranged at intervals along the axial direction of the second exhaust pipe, each first exhaust pipe is connected to the second exhaust pipe, and the multiple first exhaust pipes are respectively used to be connected to the injection holes of the multiple battery cells in a one-to-one correspondence.

[0025] The plurality of first exhaust pipelines are connected to the interior of the plurality of battery cells and to the second exhaust pipeline, so that the plurality of battery cells are exhausted by the plurality of first exhaust pipelines, which helps to improve the efficiency of the exhaust.

[0026] In some embodiments of the present application, a control valve is provided at at least one end of the first exhaust pipeline.

[0027] The control valve is used to control the opening or closing of the first exhaust pipeline, so as to facilitate the control and management of the formation exhaust and improve the stability of the formation process.

[0028] In a second aspect, the present application provides a battery formation device, comprising an exhaust device for battery formation as described in any one of the embodiments of the first aspect; and a negative pressure device, which is connected to the exhaust device for battery formation and is used to provide negative pressure to the battery cell.

[0029] The battery formation device provided in the present application includes the exhaust device described in any one of the embodiments of the first aspect, and thus has the technical effects of any of the above embodiments, which will not be described in detail herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0031] Figure 1 A schematic diagram of the assembly structure of the exhaust device and the battery cell provided in some embodiments of the present application;

[0032] Figure 2 A schematic diagram of an assembly structure of a baffle and a first exhaust pipe provided in some embodiments of the present application;

[0033] Figure 3 A schematic diagram of an assembly structure of another resistance member and a first exhaust pipe provided in some embodiments of the present application;

[0034] Figure 4 A schematic diagram of the assembly structure of another baffle and the first exhaust pipe provided in some embodiments of the present application.

[0035] The reference numerals are as follows:

[0036] 100. exhaust device; 200. battery cell;

[0037] 11. first exhaust pipeline; 12. swirl element; 121. connecting rod; 122. spiral guide vane; 123. spiral flow channel; 13. flow blocking element; 14. formation cup; 141. accommodating chamber; 15. second exhaust pipeline; 16. control valve; 17. filter screen. DETAILED DESCRIPTION

[0038] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0040] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0041] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0042] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0043] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0044] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0045] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0046] At present, from the perspective of market development, the application of battery devices is becoming more and more extensive. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of battery devices, the market demand is also constantly expanding.

[0047] In the battery manufacturing process, battery formation is to charge and discharge the battery after filling, and form a solid electrolyte interface film on the surface of the electrode assembly to prevent the electrolyte from undergoing redox reaction with the electrode active material, thereby ensuring the electrochemical stability of the battery cell. In the formation process, there will be gas generation. In order to prevent the battery cell from bloating after formation, an exhaust device is generally used to release the gas to the greatest extent.

[0048] In the related art, during the exhaust process of the exhaust device, the gas is discharged from the gas pipe and the electrolyte inside the battery cell is taken out, causing the loss of the electrolyte inside the battery cell, thereby causing the battery performance to decline.

[0049] In order to solve the problem of electrolyte loss caused by gas discharge during battery formation, the present application designs a battery formation exhaust device, which is configured by providing a first exhaust pipeline connected to the injection hole of the battery cell, and arranging a swirl member at one end of the first exhaust pipeline close to the injection hole, the swirl member is provided with a spiral flow channel, and at least one baffle is provided in the first exhaust pipeline, the baffle is provided on the side of the spiral flow channel away from the battery cell, during the battery formation process, the gas carries the electrolyte into the first exhaust pipeline, and after entering the spiral flow channel, it flows spirally along the spiral flow channel, under the action of centrifugal force, most of the electrolyte moves toward the inner wall of the first exhaust pipeline and can adhere to the inner wall of the first exhaust pipeline, and the gas is discharged along the spiral flow channel, and the remaining electrolyte can be further blocked when encountering at least one baffle, thereby further reducing the loss of electrolyte, and when the formation is at rest, the electrolyte can flow back to the inside of the battery cell, thereby reducing the loss of electrolyte during the battery formation process and helping to improve the performance of the battery cell.

[0050] The exhaust device for battery formation disclosed in the embodiment of the present application is suitable for the battery formation process in battery production and manufacturing. The exhaust device provided in the embodiment of the present application can reduce the loss of electrolyte in the battery formation process and help improve the performance of the battery cell.

[0051] See also Figures 1 to 4 , Figure 1 A schematic diagram of the assembly structure of the exhaust device and the battery cell provided in some embodiments of the present application; Figure 2 A schematic diagram of an assembly structure of a baffle and a first exhaust pipe provided in some embodiments of the present application; Figure 3 A schematic diagram of an assembly structure of another resistance member and a first exhaust pipe provided in some embodiments of the present application; Figure 4A schematic diagram of the assembly structure of another baffle and the first exhaust duct provided for some embodiments of the present application. The embodiment of the present application provides an exhaust device 100 for battery formation, including a first exhaust duct 11, a swirl member 12 and at least one baffle member 13. Among them, one end of the first exhaust duct 11 is used to communicate with the injection hole of the battery cell 200; the swirl member 12 is arranged in the first exhaust duct 11, and is located on the side of the first exhaust duct 11 close to the battery cell 200, the swirl member 12 is connected to the inner wall surface of the first exhaust duct 11, and the swirl member 12 is provided with a spiral flow channel 123, and the spiral flow channel 123 is used to guide the fluid medium to spirally flow in the first exhaust duct 11; at least one baffle member 13 is arranged in the first exhaust duct 11, and is used to be arranged on the side of the swirl member 12 away from the battery cell 200.

[0052] It is understandable that the injection hole of the battery cell 200 is connected to the inside of the battery cell 200, and electrolyte can be injected into the battery cell 200 through the injection hole. The first exhaust line 11 is provided on one side of the battery cell 200 having the injection hole and extends in a direction away from the battery cell 200.

[0053] The spiral flow channel 123 refers to a flow channel arranged in a spiral shape.

[0054] Exemplarily, the baffle 13 may be a resistance plate, a protrusion, a conical barb, etc., which are arranged on the inner wall surface of the first exhaust pipe 11 .

[0055] According to the exhaust device 100 for battery formation provided by the present application, by arranging a swirl member 12 in the first exhaust line 11, and the swirl member 12 is located on the side of the first exhaust line close to the battery cell 200, when the battery is exhausted during formation, the gas carries the electrolyte into the first exhaust line 11 from the injection hole, and flows in a spiral along the spiral flow channel 123 defined by the swirl member 12, and the spiral flow channel 123 plays a role in guiding the flow, and during the flow of the gas and the electrolyte in the spiral flow channel 123, due to the effect of inertia, the electrolyte and the gas can be separated under the effect of inertia, and the separated gas and the electrolyte can be separated. The electrolyte flows toward the inner wall of the first exhaust pipe 11 and can adhere to the inner wall of the first exhaust pipe 11, while the gas further flows along the spiral flow channel 123 and is discharged. In addition, since at least one blocking member is provided at the end of the spiral flow channel 123, the at least one blocking member can block the electrolyte remaining in the spiral flow channel 123, thereby further reducing the discharge of the electrolyte. In this way, when the formation enters a static state, the electrolyte can flow back into the battery cell 200, thereby improving the loss of the electrolyte during the battery formation process and helping to improve the performance of the battery cell 200.

[0056] According to some embodiments of the present application, the swirl member 12 includes a connecting rod 121 and a spiral guide vane 122. The spiral guide vane 122 is arranged around the outer peripheral side of the connecting rod 121 and is connected to the inner wall surface of the first exhaust pipe 11. A spiral flow channel 123 is defined between the spiral guide vane 122 and the connecting rod 121.

[0057] Exemplarily, the connecting rod 121 may be a hollow structure or a solid column.

[0058] Exemplarily, the spiral guide vane 122 is wound around the outer circumference of the connecting rod 121 and fills the gap between the connecting rod 121 and the inner wall surface of the first exhaust pipe 11. The spiral guide vane 122 is wound around at least two times, so that a spiral flow channel 123 can be defined between the spiral guide vane 122 and the connecting rod.

[0059] The connecting rod 121 serves to support and connect the spiral guide vane 122. The spiral guide vane 122 extends in a spiral manner around the outer circumference of the connecting rod 121, thereby defining a spiral flow channel 123 between the connecting rod 121. The spiral guide vane 122 has a simple structure and is easy to process and form. By connecting the spiral guide vane 122 to the inner wall surface of the first exhaust pipe 11, the reliability of the installation of the swirl element 12 in the first exhaust pipe can be improved.

[0060] According to some embodiments of the present application, the connecting rod 121 is coaxially arranged with the first exhaust pipe 11 .

[0061] By arranging the connecting rod 121 coaxially with the first exhaust pipe 11, not only the overall structure of the product is made more regular, but also the uniformity of gas-liquid separation of the electrolyte and the gas is improved, which helps to make the electrolyte adhere evenly to the inner wall surface of the first exhaust pipe and helps to improve the reflux efficiency of the electrolyte.

[0062] According to some embodiments of the present application, the spiral flow channel 123 has an inlet end and an outlet end. The inlet end is located on a side of the swirl element 12 away from the baffle element 13 , and the outlet end is arranged corresponding to the baffle element 13 .

[0063] After the gas and electrolyte enter the first exhaust pipe 11 through the injection hole, they can enter the spiral flow channel 123 from the inlet end. Most of the electrolyte can adhere to the inner wall surface of the first exhaust pipe 11 under the action of centrifugal force, and the gas and the remaining electrolyte continue to flow along the spiral flow channel 123 and are discharged from the outlet end. Since the outlet end is provided with at least one baffle 13, the at least one baffle 13 can be used to further block the electrolyte, thereby further reducing the loss of the electrolyte.

[0064] See also Figures 1 to 4According to some embodiments of the present application, there are multiple spoilers 13 , and the multiple spoilers 13 are arranged at intervals along the axial direction of the first exhaust pipe 11 .

[0065] By setting the number of the blocking members 13 to be multiple, the electrolyte can be blocked multiple times by using the multiple blocking members 13, thereby further reducing the loss of the electrolyte.

[0066] See also Figure 2 According to some embodiments of the present application, the baffle 13 is arranged to be inclined from top to bottom along one end connected to the inner wall surface of the first exhaust pipe 11 to the other end.

[0067] The blocking member 13 adopts the above-mentioned setting mode, so that the electrolyte can flow back into the battery cell 200 under the action of gravity when the electrolyte is formed and left to stand. The structure and principle are relatively simple and easy to implement.

[0068] See also Figure 1 According to some embodiments of the present application, the exhaust device 100 also includes a formation cup 14, which is used to be arranged between the first exhaust line 11 and the battery cell 200. The formation cup 14 has a accommodating cavity 141, which is connected to the first exhaust line 11 and is used to be connected to the injection hole of the battery cell 200.

[0069] The formation cup 14 is a container for collecting electrolyte, wherein the formation cup 14 may be in a straight cylindrical shape, and the diameter of the formation cup 14 is greater than the diameter of the first exhaust pipe 11 .

[0070] By setting a formation cup 14 between the first exhaust pipe 11 and the battery cell 200, the formation cup 14 is connected to the interior of the battery cell 200 and the first exhaust pipe 11, so that it can collect the electrolyte refluxed in the first exhaust pipe 11, and it is convenient to reflux the refluxed electrolyte to the interior of the battery cell 200, which helps to improve the formation efficiency.

[0071] See also Figure 1 According to some embodiments of the present application, at least one filter 17 is provided in the accommodating cavity 141 .

[0072] Exemplarily, the filter screen is extended along the diameter direction of the formation cup 14, and the filter screen 17 is provided with a plurality of filter holes. The smaller the pores of the filter holes are, the more electrolyte can be blocked.

[0073] By arranging the filter 17 in the accommodating cavity, the filter 17 can allow the gas to pass through and flow to the first exhaust pipe 11, and can filter and block the electrolyte discharged from the battery cell 200, thereby further reducing the loss of the electrolyte.

[0074] According to some embodiments of the present application, the exhaust device 100 for battery formation further includes a second exhaust pipeline 15 , which is connected to the other end of the first exhaust pipeline 11 .

[0075] Exemplarily, the diameter of the second exhaust line 15 is greater than the diameter of the first exhaust line 11 .

[0076] The second exhaust pipeline 15 is connected to the first exhaust pipeline 11 and is used to guide the gas in the first exhaust pipe out, thereby achieving the purpose of exhaust gas.

[0077] See also Figure 1 According to some embodiments of the present application, there are multiple first exhaust pipes 11, and the multiple first exhaust pipes 11 are arranged at intervals along the axial direction of the second exhaust pipe 15. Each first exhaust pipe 11 is connected to the second exhaust pipe 15, and the multiple first exhaust pipes 11 are respectively used to be connected to the injection holes of multiple battery cells 200 in a one-to-one correspondence.

[0078] The plurality of first exhaust pipes 11 are connected to the interior of the plurality of battery cells 200 and to the second exhaust pipe 15 , so that the plurality of battery cells 200 are exhausted by the plurality of first exhaust pipes 11 , which helps to improve the efficiency of exhaust.

[0079] See also Figure 1 According to some embodiments of the present application, a control valve 16 is provided at at least one end of the first exhaust pipe 11 .

[0080] Exemplarily, the control valve is a solenoid valve or a throttle valve, etc.

[0081] The control valve 16 is used to control the opening or closing of the first exhaust pipeline 11, so as to facilitate the control and management of the formation exhaust gas and improve the stability of the formation process.

[0082] According to some embodiments of the present application, see Figures 1 to 4The present application provides an exhaust device 100 for battery formation, comprising a formation cup 14, a first exhaust pipeline 11, a second exhaust pipeline 15, a swirl member 12 and at least one baffle member 13. The first exhaust pipeline 11 is connected to the second exhaust pipeline 15, the formation cup 14 has a receiving chamber 141, the bottom of the receiving chamber 141 is used to communicate with the injection hole of the battery cell 200, and the top of the receiving chamber 141 is connected to the first exhaust pipeline 11. The swirl member 12 is arranged in the first exhaust pipeline 11 and is located on a side close to the formation cup 14. The swirl member 12 has a spiral flow channel 123, and the spiral flow channel 123 is used to guide the fluid medium to flow spirally in the first exhaust pipeline 11. At least one baffle member 13 is arranged in the first exhaust pipeline 11 and is arranged on the side of the swirl member 12 away from the formation cup 14, for blocking the flow of the electrolyte. By adopting the above technical solution, the loss of electrolyte during the battery formation process can be reduced, and the electrolyte can be easily refluxed to the inside of the battery cell 200, which helps to improve the performance of the battery cell 200.

[0083] According to some embodiments of the present application, the present application also provides a battery formation device, including a negative pressure device and an exhaust device 100 as any one of the embodiments of the first aspect; the negative pressure device is connected to the exhaust device 100 and is used to provide negative pressure to the battery cell 200.

[0084] The battery formation device provided in the present application includes the exhaust device 100 of any one of the embodiments of the first aspect, and thus has the technical effects of any of the above embodiments, which will not be described in detail herein.

[0085] The above is only a preferred specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An exhaust device for battery formation, characterized in that: include: a first exhaust pipeline, one end of which is used to communicate with the injection hole of the battery cell; A swirl member is disposed in the first exhaust pipeline and is located on a side of the first exhaust pipeline close to the battery cell, the swirl member is connected to an inner wall surface of the first exhaust pipeline, and the swirl member is provided with a spiral flow channel, and the spiral flow channel is used to guide the fluid medium to flow in a spiral in the first exhaust pipeline; At least one baffle is disposed in the first exhaust pipe and is used to be disposed on a side of the swirl member away from the battery cell.

2. The exhaust device for battery formation according to claim 1, characterized in that: The swirl member includes a connecting rod and a spiral guide vane. The spiral guide vane is wound around the outer peripheral side of the connecting rod and connected to the inner wall surface of the first exhaust pipe. The spiral flow channel is defined between the spiral guide vane and the connecting rod.

3. The exhaust device for battery formation according to claim 2, characterized in that: The connecting rod is coaxially arranged with the first exhaust pipe.

4. The exhaust device for battery formation according to any one of claims 1 to 3, characterized in that: The spiral flow channel has an inlet end and an outlet end. The inlet end is located at a side of the swirl component away from the baffle component, and the outlet end is arranged corresponding to the baffle component.

5. The exhaust device for battery formation according to any one of claims 1 to 3, characterized in that: There are multiple baffles, and the multiple baffles are arranged at intervals along the axial direction of the first exhaust pipe.

6. The exhaust device for battery formation according to any one of claims 1 to 3, characterized in that: The baffle is arranged obliquely from top to bottom along one end connected to the inner wall surface of the first exhaust pipe to the other end.

7. The exhaust device for battery formation according to any one of claims 1 to 3, characterized in that: The exhaust device further includes a formation cup, which is used to be arranged between the first exhaust pipeline and the battery cell. The formation cup has a receiving cavity, which is communicated with the first exhaust pipeline and is used to communicate with the injection hole of the battery cell.

8. The exhaust device for battery formation according to claim 7, characterized in that: At least one filter screen is arranged in the accommodating cavity.

9. The exhaust device for battery formation according to any one of claims 1 to 3, characterized in that: The exhaust device further includes a second exhaust pipeline, and the second exhaust pipeline is connected to the other end of the first exhaust pipeline.

10. The exhaust device for battery formation according to claim 9, characterized in that: There are multiple first exhaust pipelines, and the multiple first exhaust pipelines are arranged at intervals along the axial direction of the second exhaust pipeline. Each first exhaust pipeline is connected to the second exhaust pipeline, and the multiple first exhaust pipelines are respectively used to be connected to the injection holes of the multiple battery cells in a one-to-one correspondence.

11. The exhaust device for battery formation according to any one of claims 1 to 3, characterized in that: A control valve is disposed at at least one end of the first exhaust pipeline.

12. A battery formation device, characterized in that: include: An exhaust device for battery formation as claimed in any one of claims 1 to 11; and A negative pressure device is connected to the exhaust device for battery formation and is used to provide negative pressure to the battery monomer.

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