Exhaust device and battery formation equipment

Abstract

The invention provides an exhaust device and battery formation equipment, the exhaust device comprises a pressing plate and a telescopic block, the pressing plate is provided with a telescopic hole, the pressing plate is used for abutting against a part of a packaging film wrapping a roll core, the telescopic hole and the roll core are spaced, the telescopic block is arranged in the telescopic hole, and the outer end of the telescopic block is used for being connected with a part of the packaging film forming an air bag. The telescopic block can move in the axial direction of the telescopic hole relative to the pressing plate and is used for driving the packaging film to move in the axial direction of the telescopic hole so as to change the opening degree of the air bag. According to the exhaust device, the pressing plate is arranged to abut against part of the packaging film wrapping the roll core, so that gas generated by the roll core moves towards the air bag of the battery, and meanwhile, the packaging film forming the air bag is connected and driven to move through the telescopic block, so that the opening degree of the air bag is increased; therefore, gas generated by the roll core can smoothly and completely enter the gas bag through the cooperation of the pressing plate and the telescopic block.

Description

Technical Field

[0001] The invention relates to the field of battery production, and in particular to an exhaust device and a battery formation device. Background Art

[0002] During the production process of soft-pack batteries, the core roll is first wrapped in an aluminum-plastic film. At the same time, an air bag is formed in the aluminum-plastic film and arranged side by side with the core roll. The aluminum-plastic film is then top-sealed and side-sealed. Liquid is then injected into the film and the film is sealed. After the injection and sealing are completed, chemical formation is carried out. The gas generated during the chemical formation is contained by the air bag. After the chemical formation is completed, the air bag is punctured and the gas in the air bag is extracted. The aluminum-plastic film is then sealed again to separate the core roll and the air bag. Finally, the part of the aluminum-plastic film that forms the air bag is cut off.

[0003] However, in the actual production process, the aluminum-plastic film will deform during the injection and sealing process, and the air bag may be squeezed. The gas generated during the formation process is difficult to push the aluminum-plastic film and completely enter the air bag. When the air bag is vacuumed under negative pressure, the air bag quickly deflates under the action of negative pressure, which also forms an obstacle to the gas near the core, causing some gas to remain near the core and cannot be completely extracted. In addition, the aluminum-plastic film will produce wrinkles during the deformation process, affecting the quality of the second seal and causing leakage at the edge of the battery. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the present invention provides an exhaust device that can change the opening of the air bag so that the gas generated by the winding core can smoothly enter the air bag.

[0005] An embodiment of the present invention further provides a battery formation device.

[0006] The exhaust device of the embodiment of the present invention comprises:

[0007] A pressing plate, wherein the pressing plate is provided with a telescopic hole, the pressing plate is used to abut against a portion of the packaging film wrapping the roll core, and the telescopic hole is spaced from the roll core;

[0008] A telescopic block, wherein the telescopic block is arranged in the telescopic hole, and the outer end of the telescopic block is used to connect a part of the packaging film that forms the air bag. The telescopic block can move axially along the telescopic hole relative to the pressure plate, and is used to drive the packaging film to move axially along the telescopic hole to change the opening of the air bag.

[0009] The exhaust device of the embodiment of the present invention is provided with a pressure plate to abut against part of the packaging film wrapped around the core, so that the gas generated by the core moves to the air bag of the battery to avoid gas accumulation at the core. At the same time, the packaging film forming the air bag is connected and driven to move by the telescopic block to increase the opening of the air bag, so that the gas generated by the core can smoothly enter the air bag through the cooperation of the pressure plate and the telescopic block. In addition, the telescopic block is connected and drives the packaging film to move, and the flatness of the packaging film can be ensured during the movement, thereby avoiding wrinkles in the packaging film and ensuring the quality of the second seal.

[0010] In some embodiments, the pressure plate is further provided with a connected inner cavity and a pressure regulating hole, the pressure regulating hole is used to adjust the pressure of the inner cavity, the telescopic hole is connected to the inner cavity, and the telescopic block moves under the pressure of the inner cavity.

[0011] In some embodiments, the telescopic block is provided with an air hole, one end of the air hole is connected to the inner cavity, and the other end of the air hole is provided on the outer end surface of the telescopic block, and the air hole is used to adsorb the packaging film on the outer end surface of the telescopic block when the inner cavity is under negative pressure.

[0012] In some embodiments, the exhaust device also includes an elastic member, which is disposed in the inner cavity. The elastic member is arranged axially along the telescopic hole and is connected to the inner end of the telescopic block so that the telescopic block has a tendency to move toward the outside of the pressure plate.

[0013] In some embodiments, an inner end surface of the telescopic block is provided with a mounting groove, and one end of the elastic member is located in the mounting groove.

[0014] In some embodiments, during the movement of the telescopic block, the outer end surface of the telescopic block is always located outside the pressure plate, or, when the telescopic block is located at the extreme position retracted into the pressure plate, the outer end surface of the telescopic block is flush with the end surface of the pressure plate where the telescopic hole is provided.

[0015] In some embodiments, the wall surface of the telescopic hole is sealed with the telescopic block.

[0016] In some embodiments, the pressure plate includes a connected main body and a side plate, the main body is provided with the inner cavity and the pressure regulating hole, the side plate is provided with the telescopic hole, and on a projection plane orthogonal to the axial direction of the telescopic hole, the projection of the telescopic hole is located within the projection of the inner cavity, the telescopic block includes a narrow section and a wide section arranged in sequence along the axial direction of the telescopic hole, the narrow section is penetrated through the telescopic hole and sealed with the hole wall surface of the telescopic hole, the wide section is arranged in the inner cavity, and the circumferential wall surface of the wide section is against the circumferential wall surface of the inner cavity.

[0017] In some embodiments, the exhaust device further comprises a sealing ring, which is coaxially arranged with the telescopic hole and embedded in the hole wall surface of the telescopic hole, and the sealing ring abuts against the circumferential wall surface of the narrow section.

[0018] The battery formation equipment of an embodiment of the present invention includes: the exhaust device described in any one of the above embodiments, wherein the exhaust devices are at least two arranged at intervals, and a battery is arranged between adjacent exhaust devices, and the battery includes a winding core and a packaging film, and the packaging film encloses a first chamber and a second chamber that are connected, the first chamber is provided with the winding core, and the second chamber forms an air bag, and the pressing plates of adjacent exhaust devices are used to clamp the winding core corresponding to the battery and a part of the packaging film that encloses the first chamber, and the telescopic block is provided at the end of the pressing plate abutting against the packaging film, and the telescopic block is connected to the part of the packaging film that encloses the second chamber.

[0019] The battery formation equipment of the embodiment of the present invention places the battery between two adjacent exhaust devices, clamps the winding core and a portion of the packaging film surrounding the first chamber by means of pressure plates on both sides of the battery, and stretches and supports a portion of the packaging film surrounding the second chamber by means of telescopic blocks on both sides of the battery, so as to ensure that the gas generated by the winding core can smoothly enter the air bag, while also preventing wrinkles in the packaging film, thereby ensuring the quality of the second seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a cross-sectional view of a first embodiment of an exhaust device according to an embodiment of the present invention;

[0021] Figure 2 is a cross-sectional view of a second embodiment of the exhaust device according to the embodiment of the present invention;

[0022] Figure 3 is a schematic structural diagram of a battery formation device according to an embodiment of the present invention;

[0023] Figure 4 yes Figure 3 Partial cross-sectional view of a battery formation device.

[0024] Reference numerals:

[0025] 1. Pressing plate; 11. Telescopic hole; 12. Inner cavity; 13. Pressure regulating hole; 14. Main body; 15. Side plate; 16. Sealing plate; 2. Roll core; 3. Packaging film; 4. Telescopic block; 41. Air hole; 42. Mounting groove; 5. Air bag; 6. Elastic part; 7. Sealing ring. DETAILED DESCRIPTION

[0026] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0027] Reference below Figure 1-Figure 4 An exhaust device and a battery formation apparatus according to an embodiment of the present invention are described.

[0028] like Figure 1-Figure 4 As shown, the exhaust device according to the embodiment of the present invention includes a pressing plate 1 and a telescopic block 4.

[0029] The pressing plate 1 is provided with a telescopic hole 11, and the pressing plate 1 is used to abut against a part of the packaging film 3 wrapping the core 2, and the telescopic hole 11 is spaced from the core 2. The telescopic block 4 is provided in the telescopic hole 11, and the outer end of the telescopic block 4 is used to connect the part of the packaging film 3 forming the air bag 5. The telescopic block 4 can move along the axial direction of the telescopic hole 11 relative to the pressing plate 1, and is used to drive the packaging film 3 to move along the axial direction of the telescopic hole 11 to change the opening of the air bag 5.

[0030] like Figure 1-Figure 4 As shown, the exhaust device of the embodiment of the present invention is used to exhaust the battery in the formation process. The battery in the formation process includes a packaging film 3 and a winding core 2. The packaging film 3 encloses a first chamber and a second chamber that are connected. The first chamber is located below the second chamber. The first chamber is provided with a winding core 2. The second chamber forms an air bag 5. The winding core 2 generates gas during the formation. The air bag 5 is used to collect the generated gas. The exhaust device of the embodiment of the present invention is used to ensure that all the generated gas smoothly enters the air bag 5. The packaging film 3 is preferably an aluminum-plastic film.

[0031] Specifically, the exhaust device of the embodiment of the present invention includes a pressure plate 1 and a telescopic block 4. The pressure plate 1 is arranged in the vertical direction. The top of the pressure plate 1 is provided with a telescopic hole 11 extending in the left-right direction. The telescopic block 4 is arranged in the telescopic hole 11. The telescopic block 4 has an outer end and an inner end arranged relatively to each other in the left-right direction. The inner end of the telescopic block 4 is located in the pressure plate 1. The telescopic block 4 can move in the left-right direction relative to the pressure plate 1.

[0032] When the exhaust device of the embodiment of the present invention is in use, the pressure plate 1 abuts against the portion of the packaging film 3 forming the first chamber to apply a certain pressure to the portion of the packaging film 3 forming the first chamber and the winding core 2, and the telescopic block 4 is located above the portion of the packaging film 3 forming the first chamber and the winding core 2, and the outer end of the telescopic block 4 is connected to the portion of the packaging film 3 forming the second chamber and the air bag 5, so that the movement of the telescopic block 4 drives the portion of the packaging film 3 forming the second chamber and the air bag 5 to move, thereby changing the opening of the air bag 5 and opening the entrance of the air bag 5. With the cooperation of the pressure plate 1 and the telescopic block 4, the gas generated by the winding core 2 can smoothly enter the air bag 5.

[0033] It should be noted that the opening of the air bag 5 refers to the size of the opening of the air bag 5 toward one end of the winding core 2 . The larger the opening of the air bag 5 , the easier it is for the gas generated by the winding core 2 to enter the air bag 5 .

[0034] According to the different areas of the telescopic block 4 and the air bag 5 along the direction perpendicular to the left and right, there are two ways to connect the telescopic block 4 and the air bag 5.

[0035] In the first connection mode, the area of ​​the outer end face of the telescopic block 4 is greater than or equal to the side wall area of ​​the air bag 5. At this time, the packaging film 3 on one side of the air bag 5 along the left and right directions is all connected to the outer end of the telescopic block 4. The movement of the telescopic block 4 can adjust the overall cross-sectional area of ​​the air bag 5, including adjusting the opening of the air bag 5, so that the entrance of the air bag 5 is opened.

[0036] In the second connection method, such as Figure 3 As shown, the area of ​​the outer end face of the telescopic block 4 is smaller than the side wall area of ​​the air bag 5. At this time, among the packaging films 3 on one side of the air bag 5 along the left-right direction, the part of the packaging films 3 facing one end of the winding core 2 is connected to the outer end of the telescopic block 4. In other words, the air bag 5 includes a main body and a channel part. The channel part is connected between the first chamber and the main body. The telescopic block 4 is connected to the part of the packaging film 3 that forms the channel part. The cross-sectional area of ​​the channel part is adjusted by moving the telescopic block 4 to open the channel part, thereby adjusting the opening of the air bag 5 to open the entrance of the air bag 5. Of course, when the part of the packaging film 3 that forms the channel part moves, it will also drive the part of the packaging film 3 that forms the main body part to move, so that the main body part will also expand to a certain extent.

[0037] The second connection mode is preferably adopted. In the second connection mode, the telescopic block 4 is not limited to opening the entrance of the air bag 5 to change the opening of the air bag 5. In other words, it is not limited to increasing the opening of the air bag 5. Specifically, the gas generated by the winding core 2 enters the main body through the channel part for storage. After all the gas enters the main body, the opening of the air bag 5 is reduced by the reverse movement of the telescopic block 4. In other words, the cross-sectional area of ​​the channel part is reduced by the reverse movement of the telescopic block 4, so as to facilitate the subsequent second sealing, and at the same time, it can also prevent the gas in the main body from flowing back to the first chamber.

[0038] Since the opening of the air bag 5 is changed by the movement of the packaging film 3 driven by the telescopic block 4, the telescopic block 4 drives an area of ​​the packaging film 3 to move through its outer end rather than a point or a line. Therefore, the packaging film 3 has a certain flatness when it moves and deforms, thereby avoiding wrinkles in the packaging film 3 after movement and deformation, and ensuring the quality of the subsequent second seal.

[0039] It should be noted that the outer end of the telescopic block 4 and the packaging film 3 can be connected surface to surface, for example, the outer end surface of the telescopic block 4 is adhesively connected to the packaging film 3, or the outer end surface or the side wall surface of the telescopic block 4 can be connected to multiple connection positions on the packaging film 3, and the connection positions can be point-shaped or line-shaped, but in effect, the telescopic block 4 moves an area of ​​the packaging film 3.

[0040] The exhaust device of the embodiment of the present invention is provided with a pressure plate to abut against part of the packaging film wrapped around the core, so that the gas generated by the core moves to the air bag of the battery to avoid gas accumulation at the core. At the same time, the packaging film forming the air bag is connected and driven to move by the telescopic block to increase the opening of the air bag, so that the gas generated by the core can smoothly enter the air bag through the cooperation of the pressure plate and the telescopic block. In addition, the telescopic block is connected and drives the packaging film to move, and the flatness of the packaging film can be ensured during the movement, thereby avoiding wrinkles in the packaging film and ensuring the quality of the second seal.

[0041] In some embodiments, the pressure plate 1 is further provided with a connected inner cavity 12 and a pressure regulating hole 13 , the pressure regulating hole 13 is used to adjust the pressure of the inner cavity 12 , the telescopic hole 11 is connected to the inner cavity 12 , and the telescopic block 4 moves under the pressure of the inner cavity 12 .

[0042] like Figure 1 , Figure 2 and Figure 4 As shown, the pressing plate 1 is provided with an inner cavity 12 extending in the left-right direction, the telescopic hole 11 is provided at the end of the inner cavity 12 in the left-right direction and is connected with the telescopic hole 11, and the pressing plate 1 is also provided with a pressure regulating hole 13 extending in the front-back direction, the pressure regulating hole 13 is connected with the inner cavity 12, and is used to adjust the pressure of the inner cavity 12, preferably to adjust the air pressure of the inner cavity 12. The telescopic block 4 moves in the left-right direction under the pressure of the inner cavity 12.

[0043] It can be understood that the telescopic block is not limited to moving under the pressure of the inner cavity. In other embodiments, the pressure plate is provided with a driving member, such as a telescopic cylinder, a linear module, a gear rack transmission mechanism, a screw transmission mechanism, etc., which drives the pressure plate to move in the left and right directions.

[0044] In some embodiments, the telescopic block 4 is provided with an air hole 41, one end of the air hole 41 is connected to the inner cavity 12, and the other end of the air hole 41 is provided on the outer end surface of the telescopic block 4, and the air hole 41 is used to adsorb the packaging film 3 on the outer end surface of the telescopic block 4 when the inner cavity 12 is under negative pressure.

[0045] like Figure 1 and Figure 2 As shown, the telescopic block 4 is provided with a plurality of air holes 41, and the air holes 41 preferably penetrate the telescopic block 4 in the left-right direction, the inner end of the air hole 41 is provided at the inner end surface of the telescopic block 4 and is connected with the inner cavity 12, and the outer end of the air hole 41 is provided at the outer end surface of the telescopic block 4, and the outer ends of the plurality of air holes 41 are evenly arranged on the outer end surface of the telescopic block 4.

[0046] When the pressure regulating hole 13 adjusts the inner cavity 12 to a negative pressure, the negative pressure of the inner cavity 12 is transmitted to the outer end of the air hole 41 located on the outer end face of the telescopic block 4, thereby adsorbing part of the packaging film 3 that forms the air bag 5, so that the packaging film 3 is adsorbed and connected to the outer end face of the telescopic block 4. At the same time, the telescopic block 4 moves inward under the drive of the negative pressure of the inner cavity 12, driving the packaging film 3 to move to increase the opening of the air bag 5.

[0047] Therefore, by providing the air holes 41, the connection between the telescopic block 4 and the packaging film 3 can be achieved simultaneously through the negative pressure of the inner cavity 12, and the telescopic block 4 can be moved inward, which is convenient for the operation and control of the exhaust device.

[0048] It is understandable that the telescopic block and the packaging film are not limited to being connected by air hole adsorption. In other embodiments, an adhesive layer is provided at the outer end of the telescopic block, and the telescopic block and the packaging film are bonded together by the adhesive layer.

[0049] In some embodiments, the exhaust device of the embodiment of the present invention also includes an elastic member 6, which is arranged in the inner cavity 12. The elastic member 6 is arranged along the axial direction of the telescopic hole 11 and is connected to the inner end of the telescopic block 4 so that the telescopic block 4 has a tendency to move to the outside of the pressure plate 1.

[0050] like Figure 1 , Figure 2 and Figure 4 As shown, an elastic member 6 extending in the left-right direction is provided in the inner cavity 12, preferably a spring or a rubber member, more preferably a spring. The elastic member 6 is connected to the inner end of the telescopic block 4 to provide an elastic force to the telescopic block 4 out of the pressure plate 1, so that the telescopic block 4 has a tendency to move out of the pressure plate 1.

[0051] When the telescopic block 4 is provided with an air hole 41, increasing the air pressure in the inner cavity 12 will cause the air hole 41 to release the adsorption of the packaging film 3, thereby causing the outer end of the air hole 41 to be connected to the atmospheric environment. At this time, the air pressure in the inner cavity 12 cannot drive the telescopic block 4 to move outward, and the operation of reducing the opening of the air bag 5 in the second connection method cannot be achieved. Therefore, an elastic member 6 is provided in the inner cavity 12, and the telescopic block 4 is driven to move outward by the elastic member 6.

[0052] Preferably, the pressure regulating hole 13 is connected to the negative pressure device through a pipeline, and the negative pressure device is turned on to form a negative pressure in the inner cavity 12. When the pressure difference between the external atmospheric pressure and the negative pressure in the inner cavity 12 to which the telescopic block 4 is subjected is greater than the elastic force of the elastic member 6, the telescopic block 4 moves inward to drive the packaging film 3 to move and increase the opening of the air bag 5. By closing the negative pressure device or disconnecting the negative pressure device to restore the atmospheric pressure in the inner cavity 12, the telescopic block 4 is driven outward by the elastic force of the elastic member 6 to drive the packaging film 3 to move and reduce the opening of the air bag 5. In other words, the telescopic block 4 is driven inward by the pressure in the inner cavity 12, and is driven outward by the elastic member 6, so that the telescopic block 4 moves in the left and right directions by the pressure in the inner cavity 12 and the elastic member 6.

[0053] It is understandable that when the first connection method is adopted, since there is no need for a telescopic block to reduce the opening of the air bag, an elastic member may not be provided. After the exhaust of the previous battery is completed, the previous battery is taken out and the telescopic block is adjusted to reset manually or by other driving members to facilitate the bonding of the telescopic block to the packaging film of the next battery.

[0054] It can be understood that the inner cavity is not limited to being provided with elastic parts, and the pressure regulating hole is not limited to being connected to the negative pressure device. In other embodiments, the telescopic block and the packaging film are bonded together by an adhesive layer, and the pressure regulating hole is connected to the air pump through a pipeline. The air pump sucks the air in the inner cavity to form a negative pressure in the inner cavity, thereby driving the telescopic block to move inward, and the air pump provides air to the inner cavity to form a positive pressure in the inner cavity, thereby driving the telescopic block to move outward.

[0055] In some embodiments, a mounting groove 42 is provided on the inner end surface of the telescopic block 4 , and one end of the elastic member 6 is located in the mounting groove 42 .

[0056] like Figure 1 , Figure 2 and Figure 4 As shown, the inner end surface of the telescopic block 4 is provided with a mounting groove 42, and one end of the elastic member 6 is located in the mounting groove 42. Preferably, the outer circumferential surface of the elastic member 6 is abutted against the inner circumferential surface of the mounting groove 42. The elastic member 6 is limited by the mounting groove 42, which ensures that the elastic force applied by the elastic member 6 to the telescopic block 4 is set in the left-right direction on the one hand, and prevents the elastic member 6 and the telescopic block 4 from separating on the other hand.

[0057] In some embodiments, during the movement of the telescopic block 4, the outer end surface of the telescopic block 4 is always located outside the pressure plate 1, or, when the telescopic block 4 is located at the extreme position retracted into the pressure plate 1, the outer end surface of the telescopic block 4 is flush with the end surface of the pressure plate 1 where the telescopic hole 11 is provided.

[0058] Specifically, when the telescopic block 4 moves in the left-right direction, the outer end surface of the telescopic block 4 is always located outside the pressing plate 1 .

[0059] Alternatively, during the process of the telescopic block 4 moving in the left and right directions, when the telescopic block 4 is located at the extreme position of being retracted into the pressure plate 1, in other words, when the telescopic block 4 is located at the position where the distance between its outer end face and the inner cavity 12 is the smallest, the outer end face of the telescopic block 4 is flush with the end face of the pressure plate 1 where the telescopic hole 11 is provided.

[0060] This prevents the end surface of the pressing plate 1 from applying pressure to the packaging film 5 connected to the telescopic block 4, causing the packaging film 5 to separate from the telescopic block 4, thereby ensuring a stable connection between the packaging film 5 and the telescopic block 4.

[0061] It is understandable that when the connecting force between the telescopic block and the packaging film is large and can ensure that the packaging film and the telescopic block will not separate, the outer end surface of the telescopic block can also enter the telescopic hole by a small distance, such as 1mm, 3mm, etc.

[0062] In some embodiments, the wall surface of the telescopic hole 11 is sealed with the telescopic block 4 .

[0063] Specifically, the hole wall surface of the telescopic hole 11 and the telescopic block 4 can be abutted and sealed, or can be sealed and connected by a sealing ring to prevent the inner cavity 12 from being connected to the atmospheric environment through the gap between the hole wall surface of the telescopic hole 11 and the telescopic block 4, causing the pressure environment of the inner cavity 12 to be affected, such as destroying the negative pressure of the inner cavity 12.

[0064] In some embodiments, the pressure plate 1 includes a connected main body 14 and a side plate 15, the main body 14 is provided with an inner cavity 12 and a pressure regulating hole 13, the side plate 15 is provided with a telescopic hole 11, and on a projection plane orthogonal to the axial direction of the telescopic hole 11, the projection of the telescopic hole 11 is located within the projection of the inner cavity 12, the telescopic block 4 includes a narrow section and a wide section arranged in sequence along the axial direction of the telescopic hole 11, the narrow section is penetrated through the telescopic hole 11, and is sealed with the hole wall surface of the telescopic hole 11, the wide section is arranged in the inner cavity 12, and the circumferential wall surface of the wide section is against the circumferential wall surface of the inner cavity 12.

[0065] like Figure 4 The pressure plate 1 shown includes a main body 14 and side plates 15 . Both the main body 14 and the side plates 15 are plates arranged in the vertical direction. The side plates 15 are arranged at the ends of the main body 14 in the left-right direction and are detachably connected to the main body 14 .

[0066] The telescopic hole 11 is provided on the side plate 15 and penetrates the side plate 15 in the left-right direction. The inner cavity 12 is provided on the main body 14 and forms an opening at one end of the main body 14 connected to the side plate 15. The opening is arranged opposite to and connected to the telescopic hole 11. The pressure regulating hole 13 is provided on the end surface of the main body 14 in the front-back direction and is connected to the inner cavity 12. Preferably, the pressure regulating hole 13 is provided in the middle of the main body 14 in the left-right direction.

[0067] The telescopic hole 11 and the inner cavity 12 are preferably coaxially arranged circles. In other words, the telescopic hole 11 and the inner cavity 12 are circles with overlapping axes. The diameter of the telescopic hole 11 is smaller than the diameter of the inner cavity 12, so that a first step is formed between the inner end surface of the side plate 15 and the inner circumference of the inner cavity 12.

[0068] The telescopic block 4 includes a narrow section and a wide section arranged in sequence along the left-right direction. The narrow section is arranged at the outer end of the wide section. Both the narrow section and the wide section are preferably circular so that a second step is formed between the narrow section and the wide section. The narrow section is inserted into the telescopic hole 11 and is sealed with the hole wall surface of the telescopic hole 11 to ensure the pressure environment of the inner cavity 12. The wide section is arranged in the inner cavity 12, and the outer circumference of the wide section is against the inner circumference of the inner cavity 12 to ensure that the air pressure in the inner cavity 12 can act on the wide section, thereby driving the telescopic block 4 to move.

[0069] During the movement of the telescopic block 4, the first step can stop against the second step to prevent the telescopic block 4 from disengaging from the telescopic hole 11. The pressing plate 1 is configured to include a body 14 and a side plate 15 to facilitate the disassembly and maintenance of the telescopic block 4 and the elastic member 6.

[0070] In some embodiments, the exhaust device of the embodiment of the present invention further includes a sealing ring 7, which is coaxially arranged with the telescopic hole 11 and embedded in the hole wall of the telescopic hole 11, and the sealing ring 7 abuts against the circumferential wall of the narrow section.

[0071] like Figure 4 As shown, the wall surface of the telescopic hole 11 is provided with a mounting groove, which is arranged axially around the telescopic hole 11. The sealing ring 7 is embedded in the mounting groove and abuts against the circumferential wall surface of the narrow section, thereby ensuring that the narrow section and the wall surface of the telescopic hole 11 are sealed.

[0072] like Figure 1 and Figure 2 As shown, according to the setting position and setting quantity of the telescopic block 4, the exhaust device includes two embodiments.

[0073] like Figure 1 The first embodiment of the exhaust device is shown, in which the left and right ends of the pressure plate 1 are provided with corresponding telescopic blocks 4. Specifically, the left and right ends of the main body 14 are provided with corresponding side plates 15, the inner cavity 12 penetrates the main body 14 in the left and right directions, and is connected between the telescopic holes 11 of the side plates 15 at both ends, each telescopic hole 11 is provided with a corresponding telescopic block 4, the elastic member 6 is located in the inner cavity 12, and abuts between the inner ends of the two telescopic blocks 4, the two telescopic blocks 4 are relatively close to each other under the negative pressure of the inner cavity 12, and are relatively far away from each other under the drive of the elastic member 6, so the left and right ends of the exhaust device of the first embodiment can be provided with corresponding batteries, and the two batteries can be exhausted at the same time through the two telescopic blocks 4.

[0074] like Figure 2The second embodiment of the exhaust device is shown, in which the corresponding telescopic block 4 is provided at one end of the pressing plate 1 in the left-right direction. Specifically, the pressing plate 1 also includes a sealing plate 16, which is a plate body arranged in the vertical direction, a side plate 15 is provided at one end of the main body 14 in the left-right direction, and a sealing plate 16 is provided at the other end, the inner cavity 12 penetrates the main body 14 in the left-right direction, one end of the inner cavity 12 is connected to the telescopic hole 11 of the side plate 15, and the other end is closed by the sealing plate 16, and the elastic member 6 is located in the inner cavity 12 and abuts between the telescopic block 4 and the sealing plate 16.

[0075] It can be understood that in the second embodiment, the pressure plate is not limited to including a sealing plate. In other embodiments, the inner cavity 12 is a groove provided on an end face of the main body 14 along the left and right directions, and the elastic member 6 abuts between the telescopic block 4 and the bottom surface of the groove of the inner cavity 12.

[0076] The exhaust device of the second embodiment can be provided with batteries only on one side where the telescopic block 4 is provided, so as to exhaust the batteries.

[0077] Reference below Figure 1-Figure 4 A battery formation apparatus according to an embodiment of the present invention is described.

[0078] like Figure 1-Figure 4 As shown, the battery formation equipment of the embodiment of the present invention includes the exhaust device of the embodiment of the present invention, the exhaust devices are at least two arranged at intervals, and the battery is arranged between adjacent exhaust devices, the battery includes a winding core 2 and a packaging film 3, the packaging film 3 surrounds a first chamber and a second chamber that are connected, the first chamber is provided with a winding core 2, and the second chamber forms an air bag 5, and the pressing plates 1 of adjacent exhaust devices are used to clamp the winding core 2 of the corresponding battery and the part of the packaging film 3 surrounding the first chamber, and the end of the pressing plate 1 abutting the packaging film 3 is provided with a telescopic block 4, and the telescopic block 4 is connected to the part of the packaging film 3 surrounding the second chamber.

[0079] Specifically, Figure 1-Figure 4 As shown, there are at least two exhaust devices arranged at intervals along the left-right direction, and preferably three or more, wherein the two exhaust devices at the end adopt the exhaust devices of the second embodiment, and the telescopic blocks 4 of the exhaust devices at the end are arranged toward another adjacent exhaust device, and several exhaust devices located between the two ends adopt the exhaust devices of the first embodiment, so that there are two telescopic blocks 4 between any two adjacent exhaust devices.

[0080] A battery is arranged between two adjacent exhaust devices, and the battery includes a packaging film 3 and a winding core 2. The packaging film 3 encloses a first chamber and a second chamber that are connected. The first chamber is located below the second chamber, and the first chamber is provided with a winding core 2. The second chamber forms an air bag 5. The partial packaging film 3 and the winding core 2 that form the first chamber are sandwiched between the pressure plates 1 of the two adjacent exhaust devices, and the two pressure plates 1 provide the restraining pressure required for the formation. The partial packaging film 3 that forms the second chamber is arranged between two telescopic blocks 4 that are arranged oppositely between the two adjacent exhaust devices. The telescopic block 4 at the right end of the left exhaust device is connected to the left end of the partial packaging film 3 that forms the second chamber, and the telescopic block 4 at the left end of the right exhaust device is connected to the right end of the partial packaging film 3 that forms the second chamber, so that the opening of the second chamber is changed by the relative movement of the two telescopic blocks 4, that is, the opening of the air bag 5 is changed. Preferably, the channel part of the air bag 5 is arranged between the two telescopic blocks 4, so that the opening and closing of the channel part can be controlled by the two telescopic blocks 4.

[0081] Preferably, the inner cavities 12 of all exhaust devices are connected to the same negative pressure device through pipelines.

[0082] Arranging multiple exhaust devices can exhaust multiple batteries at the same time, which has high production efficiency. Connecting corresponding telescopic blocks at both ends of the battery can significantly adjust the opening of the air bag, which is convenient for collecting gas.

[0083] The battery formation equipment of the embodiment of the present invention places the battery between two adjacent exhaust devices, clamps the winding core and a portion of the packaging film surrounding the first chamber by means of pressure plates on both sides of the battery, and stretches and supports a portion of the packaging film surrounding the second chamber by means of telescopic blocks on both sides of the battery, so as to ensure that the gas generated by the winding core can smoothly enter the air bag, while also preventing wrinkles in the packaging film, thereby ensuring the quality of the second seal.

[0084] It can be understood that the battery formation equipment according to the embodiment of the present invention may also have only two exhaust devices, which are arranged opposite to each other and both adopt the exhaust device of the second embodiment.

[0085] It is understandable that the exhaust device of the embodiment of the present invention is not limited to the battery formation equipment of the embodiment of the present invention. In other embodiments, the exhaust device and the working platform are arranged at intervals, and the battery is arranged between the exhaust device and the working platform.

[0086] In the description of the present invention, it is necessary to understand that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 present invention.

[0087] In addition, the terms "first" and "second" are only used for distinction, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0088] In the present invention, unless otherwise clearly specified and limited, the terms "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 one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0089] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0090] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0091] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. An exhaust device, characterized in that: include: A pressing plate (1), the pressing plate (1) being provided with a telescopic hole (11), the pressing plate (1) being used to abut against a portion of a packaging film (3) wrapping a winding core (2), and the telescopic hole (11) being spaced apart from the winding core (2); A telescopic block (4), wherein the telescopic block (4) is arranged in the telescopic hole (11), and the outer end of the telescopic block (4) is used to connect a part of the packaging film (3) that forms the air bag (5). The telescopic block (4) can move axially along the telescopic hole (11) relative to the pressure plate (1), and is used to drive the packaging film (3) to move axially along the telescopic hole (11) to change the opening of the air bag (5).

2. The exhaust device according to claim 1, characterized in that: The pressure plate (1) is also provided with a connected inner cavity (12) and a pressure regulating hole (13), wherein the pressure regulating hole (13) is used to adjust the pressure of the inner cavity (12), the telescopic hole (11) is connected to the inner cavity (12), and the telescopic block (4) moves under the pressure of the inner cavity (12).

3. The exhaust device according to claim 2, characterized in that: The telescopic block (4) is provided with an air hole (41), one end of the air hole (41) is connected to the inner cavity (12), and the other end of the air hole (41) is arranged on the outer end surface of the telescopic block (4). The air hole (41) is used to adsorb the packaging film (3) on the outer end surface of the telescopic block (4) when the inner cavity (12) is under negative pressure.

4. The exhaust device according to claim 3, characterized in that: It also includes an elastic member (6), wherein the elastic member (6) is arranged in the inner cavity (12), the elastic member (6) is arranged along the axial direction of the telescopic hole (11), and is connected to the inner end of the telescopic block (4), so that the telescopic block (4) has a tendency to move toward the outside of the pressure plate (1).

5. The exhaust device according to claim 4, characterized in that: The inner end surface of the telescopic block (4) is provided with a mounting groove (42), and one end of the elastic member (6) is located in the mounting groove (42).

6. The exhaust device according to claim 1, characterized in that: During the movement of the telescopic block (4), the outer end surface of the telescopic block (4) is always located outside the pressure plate (1); or, when the telescopic block (4) is located at the extreme position of being retracted into the pressure plate (1), the outer end surface of the telescopic block (4) is flush with the end surface of the pressure plate (1) provided with the telescopic hole (11).

7. The exhaust device according to claim 2, characterized in that: The hole wall surface of the telescopic hole (11) and the telescopic block (4) are sealed.

8. The exhaust device according to claim 7, characterized in that: The pressure plate (1) comprises a main body (14) and a side plate (15) connected to each other. The main body (14) is provided with the inner cavity (12) and the pressure regulating hole (13). The side plate (15) is provided with the telescopic hole (11). On a projection plane orthogonal to the axial direction of the telescopic hole (11), the projection of the telescopic hole (11) is located within the projection of the inner cavity (12). The telescopic block (4) comprises a narrow section and a wide section sequentially arranged along the axial direction of the telescopic hole (11). The narrow section passes through the telescopic hole (11) and is sealed with the hole wall surface of the telescopic hole (11). The wide section is arranged in the inner cavity (12), and the circumferential wall surface of the wide section abuts against the circumferential wall surface of the inner cavity (12).

9. The exhaust device according to claim 8, characterized in that: It also comprises a sealing ring (7), which is coaxially arranged with the telescopic hole (11) and embedded in the hole wall surface of the telescopic hole (11), and the sealing ring (7) abuts against the circumferential wall surface of the narrow section.

10. A battery formation device, characterized in that: include: The exhaust device according to any one of claims 1 to 9, wherein the exhaust devices are at least two arranged at intervals, and a battery is arranged between adjacent exhaust devices, the battery comprises a winding core (2) and a packaging film (3), the packaging film (3) encloses a first chamber and a second chamber that are connected, the first chamber is provided with the winding core (2), the second chamber forms an air bag (5), and the pressing plates (1) between adjacent exhaust devices are used to clamp the winding core (2) corresponding to the battery and a portion of the packaging film (3) that encloses the first chamber, and the pressing plate (1) abutting against the end of the packaging film (3) is provided with the telescopic block (4), and the telescopic block (4) is connected to the portion of the packaging film (3) that encloses the second chamber.

Images