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WO2025025534A1 - 压装校正装置及电池制造设备 - Google Patents

压装校正装置及电池制造设备 Download PDF

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Publication number
WO2025025534A1
WO2025025534A1 PCT/CN2024/073105 CN2024073105W WO2025025534A1 WO 2025025534 A1 WO2025025534 A1 WO 2025025534A1 CN 2024073105 W CN2024073105 W CN 2024073105W WO 2025025534 A1 WO2025025534 A1 WO 2025025534A1
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WO
WIPO (PCT)
Prior art keywords
correction
press
side wall
along
base
Prior art date
Application number
PCT/CN2024/073105
Other languages
English (en)
French (fr)
Inventor
张鑫
Original Assignee
宁德时代新能源科技股份有限公司
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Filing date
Publication date
Application filed by 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Publication of WO2025025534A1 publication Critical patent/WO2025025534A1/zh

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Definitions

  • the present application relates to the technical field of battery manufacturing, and in particular to a press-fit correction device and battery manufacturing equipment.
  • the present application provides a press-fit correction device and battery manufacturing equipment, which can improve the yield rate of products.
  • the embodiment of the present application provides a press-fit correction device, which is used to correct the shell when the end cover of the battery cell is pressed into the shell, and the shell includes two first side walls arranged opposite to each other along a first direction and two second side walls arranged opposite to each other along a second direction, the second direction is perpendicular to the first direction, and the area of the first side wall is greater than the area of the second side wall.
  • the press-fit correction device includes two correction modules and a driving mechanism, which are arranged opposite to each other along the first direction, and the two correction modules are used to act on the two first side walls; the driving mechanism is used to drive the two correction modules to move closer to or away from each other along the first direction, so that each correction module corrects the corresponding first side wall.
  • two correction modules are applied to the two first side walls of the shell with a larger area so that the first side walls are corrected when the end cover is pressed into the shell, thereby constraining the first side walls to deform in a direction away from the interior of the shell, thereby making the connection between the shell and the end cover reliable and improving the yield rate of the press-fitted products.
  • each correction module includes a base and a correction block disposed on the base, and along the first direction, the correction block protrudes from the base, and the correction block is used to contact the first side wall.
  • the base is used to provide a positioning basis for the correction block, and the correction block protrudes from the base.
  • the base may not be in contact with the shell, and the correction block may be arranged near the opening of the shell to reduce the interference between the base and other components, making it easier for the end cover to be pressed into the shell.
  • the orthographic projection of the correction block on the first side wall covers the first side wall in the second direction.
  • the correction block has a larger size in the second direction and can cover the first side wall in the second direction, so as to have a better restraining effect on the first side wall in the second direction.
  • the correction block is in the form of a rectangular parallelepiped, and a length direction of the correction block is parallel to the second direction.
  • the correction block is in the form of a rectangular parallelepiped, and the length direction of the correction block is parallel to the second direction.
  • this enables the correction block to have a larger contact area with the first side wall, so that the correction block has a better restraining effect on the first side wall, and on the other hand, it is easy to process and manufacture.
  • the correction block is detachably connected to the base.
  • the calibration block is detachably connected to the base to facilitate replacement or adaption to battery cells of different specifications.
  • the multiple correction blocks are arranged at intervals along the second direction.
  • the plurality of correction blocks are arranged at intervals along the second direction, so that the correction module has a plurality of contact positions with the first side wall in the second direction, thereby having a better restraining effect on the first side wall.
  • the base includes a plurality of protrusions, and each correction block is disposed on a protrusion.
  • the base includes a plurality of protrusions, each of which corresponds to a correction block, so as to facilitate the installation and positioning of the plurality of correction blocks and reduce the weight of the base.
  • each correction block is detachably connected to the corresponding protrusion.
  • each correction block is detachably connected to the corresponding protrusion to facilitate replacement of the correction block.
  • the multiple correction blocks include two end correction blocks and at least one middle correction block, the two end correction blocks are respectively arranged at the two ends of the base along the second direction, and along the second direction, at least one middle correction block is located between the two end correction blocks.
  • the two end correction blocks and at least one middle correction block can respectively correspond to the end and the middle of the first side wall in the second direction, so as to have a better restraining effect on different parts of the first side wall.
  • projections of multiple correction blocks of two correction modules overlap with each other.
  • the base is made of metal; and/or the correction block is made of polyoxymethylene.
  • the base is made of metal, which has high strength;
  • the correction block is made of polyformaldehyde, which has the characteristics of high hardness, high toughness, and smooth surface, thereby reducing damage to the shell.
  • an embodiment of the present application further provides a battery manufacturing device, which includes a press-fit correction device as provided in any of the above embodiments.
  • FIG1 is an exploded view of a battery cell provided in some embodiments of the present application.
  • FIG2 is a schematic diagram of the structure of a press-fit correction device provided in some embodiments of the present application.
  • FIG3 is a schematic structural diagram of a press-fit correction device provided in some other embodiments of the present application.
  • FIG4 is a perspective view of a partial structure of a press-fit correction device provided in some embodiments of the present application.
  • FIG5 is a schematic diagram of the cooperation between the correction module and the housing provided in some embodiments of the present application.
  • FIG. 6 is a schematic diagram of the cooperation between the correction module and the housing provided in other embodiments of the present application.
  • Marking instructions 100-battery cell; 11-shell; 111-first side wall; 112-second side wall; 12-end cover; 13-electrode assembly; 14-electrode terminal; 200-press-fit correction device; 21-correction module; 211-base; 2111-protrusion; 212-correction block; 2121-end correction block; 2122-middle correction block; 22-driving mechanism; X-first direction; Y-second direction; Z-third direction.
  • the terms “installed”, “connected”, “connected”, and “attached” 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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements.
  • installed 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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements.
  • a and/or B can represent: A exists alone, A and B exist at the same time, and B exists alone.
  • the character "/" in this application generally indicates that the associated objects before and after are in an "or" relationship.
  • multiple refers to more than two (including two).
  • multiple groups refers to more than two groups (including two groups)
  • multiple sheets refers to more than two sheets (including two sheets).
  • the battery may be a battery module.
  • the multiple battery cells are arranged and fixed to form a battery module.
  • the battery may be a battery pack, which includes a case and battery cells, wherein the battery cells or battery modules are accommodated in the case.
  • the box body can be used as a part of the chassis structure of the vehicle.
  • part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.
  • the battery may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.
  • the battery cell may be a secondary battery.
  • a secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.
  • the battery cells may be, but are not limited to, lithium ion batteries, sodium ion batteries, sodium lithium ion batteries, lithium metal batteries, sodium metal batteries, lithium sulfur batteries, magnesium ion batteries, nickel hydrogen batteries, nickel cadmium batteries, lead storage batteries, etc.
  • a battery cell generally includes an electrode assembly.
  • the electrode assembly includes a positive electrode, a negative electrode, and a separator.
  • active ions such as lithium ions
  • the separator is set between the positive electrode and the negative electrode to prevent the positive and negative electrodes from short-circuiting, while allowing active ions to pass through.
  • the positive electrode may be a positive electrode sheet, and the positive electrode sheet may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.
  • the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is disposed on either or both of the two facing surfaces of the positive electrode current collector.
  • the positive electrode current collector may be a metal foil or a composite current collector.
  • the metal foil aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc.
  • the composite current collector may include a polymer material base and a metal layer.
  • the composite current collector may be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).
  • the positive electrode active material may include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides, and their respective modified compounds.
  • the present application is not limited to these materials, and other conventional materials that can be used as positive electrode active materials for batteries may also be used.
  • the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.
  • the negative electrode current collector may be a metal foil or a composite current collector.
  • the metal foil aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc. may be used.
  • the negative electrode current collector has two surfaces opposite to each other in its thickness direction, and the negative electrode active material is disposed on any one or both of the two opposite surfaces of the negative electrode current collector.
  • the negative electrode active material may adopt the negative electrode active material for the battery known in the art.
  • the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials and lithium titanate, etc.
  • the silicon-based material may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites and silicon alloys.
  • the tin-based material may be selected from at least one of elemental tin, tin oxide compounds and tin alloys.
  • the present application is not limited to these materials, and other traditional materials that can be used as negative electrode active materials for batteries may also be used. These negative electrode active materials may be used alone or in combination of two or more.
  • the separator is a separator.
  • the present application has no particular limitation on the type of separator, and any known separator with a porous structure having good chemical stability and mechanical stability can be selected.
  • the main material of the isolation membrane can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic.
  • the isolation membrane can be a single-layer film or a multi-layer composite film, without any particular limitation. When the isolation membrane is a multi-layer composite film, each layer
  • the materials of the positive and negative electrodes can be the same or different, and there is no particular limitation.
  • the separator can be a separate component located between the positive and negative electrodes, or it can be attached to the surface of the positive and negative electrodes.
  • the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode and serves to transmit ions and isolate the positive and negative electrodes.
  • the electrode assembly is a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into the wound structure.
  • the electrode assembly is a laminate structure.
  • the battery cell may include a housing.
  • the housing is used to encapsulate components such as the electrode assembly and the electrolyte.
  • the housing may be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing), or an aluminum-plastic film.
  • the housing includes an end cap and a shell, the shell is provided with an opening, and the end cap closes the opening to form a closed space for accommodating substances such as the electrode assembly and the electrolyte.
  • the shell may be provided with one or more openings.
  • One or more end caps may also be provided.
  • At least one electrode terminal is disposed on the housing, and the electrode terminal is electrically connected to the electrode tab of the electrode assembly.
  • the electrode terminal may be directly connected to the electrode tab, or may be indirectly connected to the electrode tab through an adapter.
  • the electrode terminal may be disposed on the end cap, or may be disposed on the housing.
  • an explosion-proof valve is provided on the housing, and the explosion-proof valve is used to release the internal pressure of the battery cell.
  • the end cap closes the opening of the shell.
  • the end cap is pressed into the opening of the shell.
  • the shell includes a bottom wall and a side wall, the side wall is arranged around the bottom wall, one end of the side wall is connected to the bottom wall, and the other end of the side wall forms an opening.
  • the shell includes two first side walls arranged opposite to each other along a first direction and two second side walls arranged opposite to each other along a second direction, and the area of the first side wall is greater than the area of the second side wall.
  • the first side wall has a larger area and the first side wall has a larger size in the second direction, when the end cap is pressed into the shell, the first side wall is easily deformed under the extrusion force of the end cap.
  • the first side wall is easy to bulge toward the outside of the shell, making the connection between the end cap and the shell fail, resulting in a low yield rate of the product.
  • the press-fit correction device includes two correction modules and a driving mechanism.
  • the driving mechanism is used to drive the two correction modules to move closer to or away from each other along a first direction.
  • the correction module is used to act on the first side wall to constrain the side wall of the shell with a larger area when the end cover is pressed into the shell, thereby reducing the risk of deformation of the shell and improving the yield of the press-fitted product.
  • the press-fit correction device is used to correct the first side wall of the shell with a larger area through two correction modules.
  • the correction module acts on the first side wall.
  • the correction module can constrain the first side wall to constrain the first side wall from deforming toward the outside of the shell, thereby reducing the probability of deformation of the first side wall, so that the product after the end cover and the shell are assembled has a higher yield rate.
  • FIG. 1 is an exploded view of a battery cell provided in some embodiments of the present application.
  • a battery cell 100 includes a housing 11, an end cap 12, an electrode assembly 13 and other functional components.
  • the housing 11 has an opening, and the end cap 12 closes the opening to isolate the internal environment of the battery cell 100 from the external environment.
  • the shell 11 is a component used to cooperate with the end cap 12 to form the internal environment of the battery cell 100, wherein the formed internal environment can be used to accommodate the electrode assembly 13, the electrolyte and other components.
  • the shell 11 and the end cap 12 can be independent components.
  • the shell 11 can be of various shapes and sizes. Specifically, the shape of the shell 11 can be determined according to the specific shape and size of the electrode assembly 13.
  • the material of the shell 11 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.
  • the end cap 12 refers to a component that covers the opening of the shell 11 to isolate the internal environment of the battery cell 100 from the external environment.
  • the shape of the end cap 12 can be adapted to the shape of the shell 11 to match the shell 11.
  • the end cap 12 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 12 is not easily deformed when squeezed and collided, so that the battery cell 100 can have a higher structural strength and reliability can also be improved.
  • Functional components such as electrode terminals 14 can be provided on the end cap 12. The electrode terminal 14 can be used to electrically connect to the electrode assembly 13 for outputting or inputting electrical energy of the battery cell 100.
  • the material of the end cap 12 can also be a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose special restrictions on this.
  • an insulating structure can also be provided on the inner side of the end cap 12, and the insulating structure can be used to isolate the electrical connection components in the shell 11 from the end cap 12 to reduce the risk of short circuit.
  • the insulating structure may be plastic, rubber, or the like.
  • the electrode assembly 13 is a component in the battery cell 100 where an electrochemical reaction occurs.
  • One or more electrode assemblies 13 may be included in the housing 11.
  • the electrode assembly 13 is mainly formed by winding or stacking the positive electrode sheet and the negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet, and the separator is used to separate the positive electrode sheet and the negative electrode sheet to avoid short circuits between the positive electrode sheet and the negative electrode sheet.
  • the parts of the positive electrode sheet and the negative electrode sheet with active materials constitute the main body of the electrode assembly 13, and the parts of the positive electrode sheet and the negative electrode sheet without active materials each constitute a pole ear.
  • the positive pole ear and the negative pole ear may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery, the positive active material and the negative active material react with the electrolyte, and the pole ear connects the electrode terminal 14 to form a current loop.
  • Figure 2 is a schematic diagram of the structure of a press-fit correction device provided in some embodiments of the present application
  • Figure 3 is a schematic diagram of the structure of a press-fit correction device provided in other embodiments of the present application
  • Figure 4 is a three-dimensional diagram of a partial structure of a press-fit correction device provided in some embodiments of the present application
  • Figure 5 is a schematic diagram of the coordination of a correction module and a shell provided in some embodiments of the present application
  • Figure 6 is a schematic diagram of the structure of a press-fit correction device provided in some embodiments of the present application. Schematic diagram of the coordination between the correction module and the shell provided in other embodiments of the present application.
  • the embodiments of the present application provide a press-fit correction device 200 for correcting the shell 11 when the end cap 12 of the battery cell 100 is pressed into the shell 11,
  • the shell 11 includes two first side walls 111 arranged opposite to each other along a first direction X and two second side walls 112 arranged opposite to each other along a second direction Y, the second direction Y is perpendicular to the first direction X, and the area of the first side wall 111 is greater than the area of the second side wall 112.
  • the press-fit correction device 200 includes two correction modules 21 and a driving mechanism 22, the two correction modules 21 are arranged opposite to each other along the first direction X, and the two correction modules 21 are used to act on the two first side walls 111; the driving mechanism 22 is used to drive the two correction modules 21 to move closer to or away from each other along the first direction X, so that each correction module 21 corrects the corresponding first side wall 111.
  • the direction indicated by the letter X is the first direction
  • the direction indicated by the letter Y is the second direction Y
  • the direction indicated by the letter Z is the third direction.
  • the third direction Z may be the direction in which the end cover 12 is pressed into the housing 11.
  • the first direction X, the second direction Y, and the third direction Z are perpendicular to each other.
  • the first direction X may be the length direction of the battery cell 100
  • the second direction Y may be the thickness direction of the battery cell 100
  • the third direction Z may be the height direction of the battery cell 100.
  • the size of the first side wall 111 in the Z direction is the same as the size of the second side wall 112 in the third direction Z, and the size of the first side wall 111 in the second direction Y may be greater than the size of the second side wall 112 in the first direction X.
  • the correction module 21 acts on the first side wall 111 and can constrain the first side wall 111 to reduce the probability of deformation of the first side wall 111.
  • the two correction modules 21 are arranged opposite to each other along the first direction X, and a clamping space is formed between the two correction modules 21 .
  • the housing 11 can be accommodated in the clamping space.
  • the driving mechanism 22 is a mechanism for driving the two correction modules 21 to move closer to or farther from each other.
  • the driving mechanism 22 may be a linear driving mechanism, such as a pneumatic cylinder, an oil cylinder, an electric push rod, etc.
  • the driving mechanism 22 may also include a motor and a transmission assembly, and the motor drives the transmission assembly to drive the two correction modules 21 to move closer to or farther from each other.
  • the number of the driving mechanism 22 may be one or two.
  • the driving mechanism 22 drives the two correction modules 21 to approach or move away from each other along the first direction X.
  • the two driving mechanisms 22 respectively drive the two correction modules 21 to approach or move away from each other along the first direction X.
  • each driving mechanism 22 is connected to a correction module 21 , and the driving mechanism 22 is used to drive the corresponding correction module 21 to move toward or away from another correction module 21 .
  • the driving mechanism 22 drives the two correction modules 21 to approach each other so that the two correction modules 21 are in contact with the two first side walls 111 respectively.
  • two correction modules 21 act on the two first side walls 111 with a larger area of the shell 11, so that when the end cover 12 is pressed into the shell 11, the first side wall 111 is corrected, and the first side wall 111 is constrained to deform in a direction away from the interior of the shell 11, so that the shell 11 and the end cover 12 are reliably connected, thereby improving the yield rate of the press-fitted product.
  • each correction module 21 includes a base 211 and a correction block 212 disposed on the base 211.
  • the correction block 212 protrudes from the base 211, and the correction block 212 is used to contact the first side wall 111.
  • the base 211 serves as a positioning basis for the correction block 212 .
  • the base 211 may be located on a side of the correction block 212 away from the first side wall 111 .
  • the volume of the base 211 may be greater than that of the correction block 212 .
  • the base 211 and the correction block 212 can be separately provided for easy processing and manufacturing.
  • the correction block 212 can be connected to the base 211 in various ways, for example, the correction block 212 can be connected to the base 211 by snap connection, riveting connection, thread connection, hot melt connection, welding connection, etc.
  • the correction block 212 protrudes from the base 211 along the first direction X, and the base 211 may have a first surface facing the first side wall 111, and the correction block 212 is protruded from the first surface.
  • the base 211 does not contact the first side wall 111.
  • the correction module 21 is disposed at a position close to the opening of the shell 11
  • a portion of the base 211 may be disposed at a position away from the shell 11
  • the correction block 212 may contact the position close to the opening of the first side wall 111. Since the base 211 does not contact the first side wall 111, the interference between the base 211 and other components (such as press-fit components, end cover 12, etc.) when the end cover 12 is assembled with the shell 11 can be reduced.
  • the base 211 is used to provide a positioning basis for the correction block 212.
  • the correction block 212 protrudes from the base 211.
  • the base 211 may not contact the shell 11.
  • the correction block 212 may be arranged near the opening of the shell 11 to reduce the interference between the base 211 and other components, so as to facilitate the end cover 12 to be pressed into the shell 11.
  • the orthographic projection of the correction block 212 on the first side wall 111 covers the first side wall 111 along the second direction Y.
  • the orthographic projection of the correction block 212 on the first side wall 111 along the first direction X refers to the projection of the correction block 212 on the first side wall 111 when viewed along the first direction X.
  • the orthographic projection of the correction block 212 on the first side wall 111 covers the first side wall 111 in the second direction Y, which means that the size of the correction block 212 in the second direction Y may be equal to or greater than the size of the first side wall 111 in the second direction Y.
  • the correction block 212 has a larger size in the second direction Y, and can cover the first side wall 111 in the second direction Y, so as to have a better restraining effect on the first side wall 111 in the second direction Y.
  • the correction block 212 is in the shape of a cuboid, and the length direction of the correction block 212 is parallel to the second direction Y.
  • the correction block 212 is in the shape of a cuboid, and the length direction of the correction block 212 is parallel to the second direction Y.
  • the width direction of the correction block 212 may be parallel to the third direction Z, so that a surface of the correction block 212 with a larger area is disposed toward the first side wall 111 , so that the correction block 212 has a larger contact area with the first side wall 111 .
  • the correction block 212 is in the shape of a rectangular parallelepiped, and the length direction of the correction block 212 is parallel to the second direction Y. On the one hand, this enables the correction block 212 to have a larger contact area with the first side wall 111, so that the correction block 212 has a better restraining effect on the first side wall 111, and on the other hand, it is easy to process and manufacture.
  • the calibration block 212 is detachably connected to the base 211 .
  • connection method between the correction block 212 and the base 211 can be that the correction block 212 and the base 211 are threadedly connected, or the correction block 212 and the base 211 are snap-connected, for example, the correction block 212 is provided with a protrusion, and the base 211 is provided with a recessed portion corresponding to the protrusion, and the protrusion is embedded in the recessed portion.
  • the correction block 212 is provided with a first mounting hole
  • the base 211 is provided with a second mounting hole
  • the base 211 and the correction block 212 are threadedly connected via a screw member penetrating the second mounting hole and the first mounting hole.
  • the calibration block 212 is detachably connected to the base 211 to facilitate replacement or adaption to battery cells 100 of different specifications.
  • the multiple correction blocks 212 there are multiple correction blocks 212 , and the multiple correction blocks 212 are arranged along the second direction Y at intervals.
  • the plurality of correction blocks 212 are arranged at intervals along the second direction Y.
  • the orthographic projections of the plurality of correction blocks 212 on the first side wall 111 cover the first side wall 111 in the second direction Y. That is, the coverage of the plurality of correction blocks 212 in the second direction Y is greater than or equal to the size of the first side wall 111 in the second direction Y.
  • the multiple correction blocks 212 are arranged at intervals along the second direction Y.
  • the multiple correction blocks 212 can be arranged at equal intervals along the second direction Y, or can be arranged at unequal intervals along the second direction Y.
  • the sizes of the plurality of correction blocks 212 may be equal or unequal along the second direction Y. In some embodiments, the sizes of the plurality of correction blocks 212 along the second direction Y are equal to facilitate processing and manufacturing.
  • the plurality of correction blocks 212 are arranged at intervals along the second direction Y, so that the correction module 21 has a plurality of contact positions with the first side wall 111 in the second direction Y, so as to have a better restraining effect on the first side wall 111 .
  • the base 211 includes a plurality of protrusions 2111 , and each correction block 212 is disposed on one protrusion 2111 .
  • the protruding portion 2111 is the basis for setting the correction block 212 .
  • Each correction block 212 is set corresponding to a protruding portion 2111 , so that a plurality of protruding portions 2111 can be arranged at intervals along the second direction Y.
  • a plurality of protrusions 2111 are located on one side of the base 211 facing the first side wall 111.
  • the correction block 212 is conveniently installed so that the correction block 212 can contact the first side wall 111 and the base 211 does not contact the first side wall 111 .
  • the plurality of protrusions 2111 may be arranged at equal intervals along the second direction Y to facilitate processing and manufacturing.
  • the base 211 includes a plurality of protrusions 2111 , and each protrusion 2111 corresponds to a correction block 212 , so as to facilitate installation and positioning of the plurality of correction blocks 212 and reduce the weight of the base 211 .
  • each correction block 212 is detachably connected to the corresponding protrusion 2111 .
  • Each correction block 212 can be connected to the corresponding protrusion 2111 in various ways, for example, the correction block 212 is threadedly connected to the base 211, or the correction block 212 is snap-connected to the base 211, for example, the correction block 212 is provided with a protrusion 2111, and the base 211 is provided with a recessed portion corresponding to the protrusion 2111, and the protrusion 2111 is embedded in the recessed portion.
  • the correction block 212 is provided with a first mounting hole
  • the protrusion 2111 is provided with a second mounting hole corresponding to the first mounting hole
  • the second mounting hole is a through hole passing through the base 211 along the first direction X
  • the protrusion 2111 and the correction block 212 are threadedly connected by a threaded member (such as a bolt) passing through the second mounting hole and the first mounting hole.
  • each correction block 212 is detachably connected to the corresponding protrusion 2111 to facilitate replacement of the correction block 212 .
  • the multiple correction blocks 212 include two end correction blocks 2121 and at least one middle correction block 2122.
  • the two end correction blocks 2121 are respectively arranged at the two ends of the base 211 along the second direction Y.
  • at least one middle correction block 2122 is located between the two end correction blocks 2121.
  • the two end correction blocks 2121 are respectively arranged at the two ends of the base 211 along the second direction Y.
  • the orthographic projections of the two end correction blocks 2121 on the first side wall 111 overlap with the two end edges of the first side wall 111 along the second direction Y, so that the two end correction blocks 2121 can correspond to the two ends of the first side wall 111 along the second direction Y.
  • one of the end correction blocks 2121 can exceed the end edge of the first side wall 111 corresponding to the second direction Y, or the end correction block 2121 can be flush with the end edge of the first side wall 111 corresponding to the second direction Y, so that the end correction block 2121 has a larger contact area with the end of the first side wall 111 corresponding to the second direction Y, so as to have a better restraining effect on the end of the first side wall 111.
  • the number of the middle correction blocks 2122 may be one, two, three or more. Optionally, as shown in FIG6 , the number of the middle correction blocks 2122 is three.
  • each correction block 212 in the second direction Y may be smaller than the size in the third direction Z. That is, each correction block 212 may be a rectangular parallelepiped, the length direction of the correction block 212 is parallel to the third direction Z, and the width direction of the correction block 212 is parallel to the second direction Y. parallel.
  • the surface of the correction block 212 that contacts the first side wall 111 may be a plane, so that the correction block 212 may have a larger contact area with the first side wall 111 .
  • the two end correction blocks 2121 and at least one middle correction block 2122 can respectively correspond to the end and the middle of the first side wall 111 in the second direction Y, so as to have a better restraining effect on different parts of the first side wall 111.
  • the projections of the multiple correction blocks 212 of the two correction modules 21 overlap with each other, which means that the multiple correction blocks 212 of the two correction modules 21 may completely overlap or partially overlap.
  • the two correction modules 21 have the same structure, and the two correction modules 21 are symmetrically arranged about the perpendicular bisector of the line connecting the two correction modules 21.
  • the two correction modules 21 have different structures, and the multiple correction blocks 212 on the two correction modules 21 are staggered.
  • the multiple correction blocks 212 of the two correction modules 21 overlap each other, which is convenient for processing and manufacturing, and the forces acting on the housing 11 by the two correction modules 21 are balanced.
  • the projections of the multiple correction blocks 212 of the two correction modules 21 are separated along the first direction X. That is, when viewed along the first direction X, the multiple correction blocks 212 of the two correction modules 21 do not overlap.
  • the base 211 is made of metal; and/or the correction block 212 is made of polyoxymethylene.
  • the base 211 is made of metal, which has high strength.
  • the base 211 may be made of, but is not limited to, stainless steel, aluminum, aluminum alloy, and the like.
  • Polyoxymethylene also known as acetal resin, polyoxymethylene, polyacetal, is a thermoplastic crystalline polymer, known as “super steel” or “sport steel”. Acetal resin is a strong and hard thermoplastic with good fatigue and thermal stability. It also has a low friction coefficient and good heat resistance. Polyoxymethylene has the characteristics of high hardness, high toughness, smooth surface, etc., which reduces damage to the housing 11.
  • the embodiments of the present application further provide a battery manufacturing device, which includes a press-fit correction device 200 as provided in any of the above embodiments.
  • the battery manufacturing equipment also includes an end cover 12 pressing device, which is used to press the end cover 12 into the opening of the shell 11 at a pressing station to close the opening.
  • the press-fitting correction device 200 is arranged at the press-fitting station. After the housing 11 is loaded to the press-fitting station, the two correction modules 21 are respectively in contact with the two first side walls 111 under the action of the driving mechanism 22.
  • the end cover 12 press-fitting device presses the end cover 12 into the opening of the housing 11.
  • the correction module 21 acts on the first side wall 111 to constrain the first side wall 111 to face away from the inside of the housing 11.
  • the deformation of the end cover 12 and the housing 11 can ensure reliable connection, thereby improving the yield rate of the press-fitted product.
  • the embodiments of the present application provide a press-fit correction device 200, which is used to correct the shell 11 when the end cap 12 of the battery cell 100 is pressed into the shell 11.
  • the press-fit correction device 200 includes two correction modules 21 and a driving mechanism 22, which are arranged oppositely along the first direction X.
  • the two correction modules 21 are used to act on the two first side walls 111; the driving mechanism 22 is used to drive the two correction modules 21 to move closer to or away from each other along the first direction X, so that each correction module 21 corrects the corresponding first side wall 111.
  • Each correction module 21 includes a base 211 and a correction block 212 arranged on the base 211.
  • the correction block 212 protrudes from the base 211, and the correction block 212 is used to contact the first side wall 111.
  • the orthographic projection of the correction block 212 on the first side wall 111 covers the first side wall 111 in the second direction Y.
  • each correction module 21 includes a correction block 212 .
  • the correction block 212 is in the form of a rectangular parallelepiped.
  • the length direction of the correction block 212 is parallel to the second direction Y.
  • each correction module 21 includes a plurality of correction blocks 212 , and the plurality of correction blocks 212 are arranged at intervals along the second direction Y. Along the first direction X, the projections of the plurality of correction blocks 212 of the two correction modules 21 overlap each other.
  • the calibration block 212 is detachably connected to the base 211 to facilitate replacement of the calibration block 212 .
  • the above-mentioned press-fit correction device 200 is used to correct the first side wall 111 with a larger area of the shell 11 through two correction modules 21.
  • the correction module 21 can constrain the first side wall 111 to constrain the first side wall 111 from deforming toward the outside of the shell 11, thereby reducing the probability of deformation of the first side wall 111, so that the product after the end cover 12 and the shell 11 are assembled has a higher yield rate.

Landscapes

  • Battery Mounting, Suspending (AREA)

Abstract

一种压装校正装置及电池制造设备，用于在电池单体（100）的端盖（12）压入壳体（11）时，对壳体（11）进行校正，壳体（11）包括沿第一方向（X）相对设置的两个第一侧壁（111）和沿第二方向（Y）相对设置的两个第二侧壁（112），第二方向（Y）与第一方向（X）垂直，第一侧壁（111）的面积大于第二侧壁（112）的面积。该压装校正装置（200）包括两个校正模块（21）和驱动机构（22），两个校正模块（21）沿第一方向（X）相对设置，两个校正模块（21）用于作用于两个第一侧壁（111）；驱动机构（22）用于驱动两个校正模块（21）沿第一方向（X）相互靠近或远离，以使每个校正模块（21）对对应的第一侧壁（111）进行校正，提高压装产品的良品率。

Description

压装校正装置及电池制造设备
相关申请的交叉引用
本申请要求享有于2023年07月28日提交的名称为“压装校正装置及电池制造设备”的中国专利申请CN202322005418.9的优先权，该申请的全部内容通过引用并入本文中。
技术领域
本申请涉及电池制造技术领域，具体而言，涉及一种压装校正装置及电池制造设备。
背景技术
节能减排是汽车产业可持续发展的关键，电动车辆由于其节能环保的优势成为汽车产业可持续发展的重要组成部分。对于电动车辆而言，电池技术又是关乎其发展的一项重要因素。
电池的制造过程中，电池的良品率是一个不可忽视的问题。因此，如何提高电池的良品率，是电池技术中一个亟需解决的技术问题。
发明内容
本申请提供一种压装校正装置及电池制造设备，能够提高产品的良品率。
本申请是通过下述技术方案实现的：
第一方面，本申请实施例提供一种压装校正装置，用于在电池单体的端盖压入壳体时，对壳体进行校正，壳体包括沿第一方向相对设置的两个第一侧壁和沿第二方向相对设置的两个第二侧壁，第二方向与第一方向垂直，第一侧壁的面积大于第二侧壁的面积。压装校正装置包括两个校正模块和驱动机构，沿第一方向相对设置，两个校正模块用于作用于两个第一侧壁；驱动机构用于驱动两个校正模块沿第一方向相互靠近或远离，以使每个校正模块对对应的第一侧壁进行校正。
根据本申请实施例的压装校正装置，通过将两个校正模块作用于壳体的面积较大的两个第一侧壁，以在端盖压入壳体时，对第一侧壁进行校正，约束第一侧壁朝背离壳体内部的方向变形，使得壳体与端盖连接可靠，提高压装产品的良品率。
根据本申请的一些实施例，每个校正模块包括基座和设置于基座的校正块，沿第一方向，校正块凸出于基座，校正块用于与第一侧壁接触。
在上述方案中，基座用于对校正块提供定位基础，校正块凸出于基 座，基座可以不与壳体接触，校正块可以设置于壳体的开口附近，以降低基座与其他部件的干涉，便于端盖压入壳体。
根据本申请的一些实施例，沿第一方向，校正块在第一侧壁上的正投影在第二方向上覆盖第一侧壁。
在上述方案中，校正块在第二方向上具有较大的尺寸，能够在第二方向上覆盖第一侧壁，以在第二方向上对第一侧壁具有较好的约束效果。
根据本申请的一些实施例，校正块呈长方体，校正块的长度方向与第二方向平行。
在上述方案中，校正块呈长方体，且校正块的长度方向与第二方向平行，一方面使得校正块能够与第一侧壁之间具有较大的接触面积，使得校正块对第一侧壁具有较好的约束效果，另一方面便于加工制造。
根据本申请的一些实施例，校正块与基座可拆卸地连接。
在上述方案中，校正块与基座可拆卸地连接，以便于更换，或适配不同规格的电池单体。
根据本申请的一些实施例，校正块的数量为多个，多个校正块沿第二方向间隔设置。
在上述方案中，多个校正块沿第二方向间隔设置，使得校正模块在第二方向上与第一侧壁具有多个接触位置，以对第一侧壁具有较好的约束效果。
根据本申请的一些实施例，基座包括多个凸出部，每个校正块设置于一个凸出部。
在上述方案中，基座包括多个凸出部，每个凸出部与一个校正块对应，以便于实现对多个校正块的安装定位，并且能够减轻基座的重量。
根据本申请的一些实施例，每个校正块与对应的凸出部可拆卸地连接。
在上述方案中，每个校正块与对应的凸出部可拆卸地连接，以便于校正块更换。
根据本申请的一些实施例，多个校正块包括两个端部校正块和至少一个中部校正块，两个端部校正块分别设置于基座的沿第二方向的两端，沿第二方向，至少一个中部校正块位于两个端部校正块之间。
在上述方案中，两个端部校正块和至少一个中部校正块能够分别对应第一侧壁在第二方向上的端部和中部，以对第一侧壁的不同部位具有较好的约束效果。
根据本申请的一些实施例，沿第一方向，两个校正模块的多个校正块的投影相互重叠。
在上述方案中，沿第一方向观察，两个校正模块的多个校正块相互重叠，便于加工制造，并且壳体受到的两个校正模块的作用力均衡。
根据本申请的一些实施例，基座的材质为金属；和/或校正块的材质为聚甲醛。
在上述方案中，基座的材质为金属，具有较高的强度；校正块的材质为聚甲醛，具有硬度高、韧性高、表面光滑等特性，降低对壳体的损伤。
第二方面，本申请实施例还提供了一种电池制造设备，其包括如上述任一实施例提供的压装校正装置。
本申请的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本申请的实践了解到。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，应当理解，以下附图仅示出了本申请的某些实施例，因此不应被看作是对范围的限定，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他相关的附图。
图1为本申请一些实施例提供的电池单体的爆炸图；
图2为本申请一些实施例提供的压装校正装置的结构示意图；
图3为本申请另一些实施例提供的压装校正装置的结构示意图；
图4为本申请一些实施例提供的压装校正装置的部分结构的立体图；
图5为本申请一些实施例提供的校正模块与壳体的配合示意图；
图6为本申请另一些实施例提供的校正模块与壳体的配合示意图。
在附图中，附图并未按照实际的比例绘制。
标记说明：100-电池单体；11-壳体；111-第一侧壁；112-第二侧壁；12-端盖；13-电极组件；14-电极端子；200-压装校正装置；21-校正模块；211-基座；2111-凸出部；212-校正块；2121-端部校正块；2122-中部校正块；22-驱动机构；X-第一方向；Y-第二方向；Z-第三方向。
具体实施方式
为使本申请实施例的目的、技术方案和优点更加清楚，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
除非另有定义，本申请所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同；本申请中在申请的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限定本申请；本申请的说明书和权利要求书及上述附图说明中的术语“包括”和 “具有”以及它们的任何变形，意图在于覆盖不排他的包含。本申请的说明书和权利要求书或上述附图中的术语“第一”、“第二”等是用于区别不同对象，而不是用于描述特定顺序或主次关系。
在本申请中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是，本申请所描述的实施例可以与其它实施例相结合。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“附接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
本申请中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本申请中字符“/”，一般表示前后关联对象是一种“或”的关系。
本申请中出现的“多个”指的是两个以上(包括两个)，同理，“多组”指的是两组以上(包括两组)，“多片”指的是两片以上(包括两片)。
在一些实施例中，电池可以为电池模块，电池单体有多个时，多个电池单体排列并固定形成一个电池模块。
在一些实施例中，电池可以为电池包，电池包包括箱体和电池单体，电池单体或电池模块容纳于箱体中。
在一些实施例中，箱体可以作为车辆的底盘结构的一部分。例如，箱体的部分可以成为车辆的地板的至少一部分，或者，箱体的部分可以成为车辆的横梁和纵梁的至少一部分。
在一些实施例中，电池可以为储能装置。储能装置包括储能集装箱、储能电柜等。
本申请实施例中，电池单体可以为二次电池，二次电池是指在电池单体放电后可通过充电的方式使活性材料激活而继续使用的电池单体。
电池单体可以但不限于为锂离子电池、钠离子电池、钠锂离子电池、锂金属电池、钠金属电池、锂硫电池、镁离子电池、镍氢电池、镍镉电池、铅蓄电池等。
电池单体一般包括电极组件。电极组件包括正极、负极以及隔离件。在电池单体充放电过程中，活性离子(例如锂离子)在正极和负极之间往 返嵌入和脱出。隔离件设置在正极和负极之间，可以起到防止正负极短路的作用，同时可以使活性离子通过。
在一些实施例中，正极可以为正极片，正极片可以包括正极集流体以及设置在正极集流体至少一个表面的正极活性材料。
作为示例，正极集流体具有在其自身厚度方向相对的两个表面，正极活性材料设置在正极集流体相对的两个表面的任意一者或两者上。
作为示例，正极集流体可采用金属箔片或复合集流体。例如，作为金属箔片，可以采用表面镀银处理的铝、表面镀银处理的不锈钢、不锈钢、铜、铝、镍、炭精电极、碳、镍或钛等。复合集流体可包括高分子材料基层和金属层。复合集流体可通过将金属材料(铝、铝合金、镍、镍合金、钛、钛合金、银及银合金等)形成在高分子材料基材(如聚丙烯、聚对苯二甲酸乙二醇酯、聚对苯二甲酸丁二醇酯、聚苯乙烯、聚乙烯等的基材)上而形成。
作为示例，正极活性材料可包括以下材料中的至少一种：含锂磷酸盐、锂过渡金属氧化物及其各自的改性化合物。但本申请并不限定于这些材料，还可以使用其他可被用作电池正极活性材料的传统材料。
在一些实施例中，负极可以为负极片，负极片可以包括负极集流体。
作为示例，负极集流体可采用金属箔片或复合集流体。例如，作为金属箔片，可以采用表面镀银处理的铝、表面镀银处理的不锈钢、不锈钢、铜、铝、镍、炭精电极、用碳、镍或钛等。
在一些实施例中，负极集流体具有在其自身厚度方向相对的两个表面，负极活性材料设置在负极集流体相对的两个表面中的任意一者或两者上。
作为示例，负极活性材料可采用本领域公知的用于电池的负极活性材料。作为示例，负极活性材料可包括以下材料中的至少一种：人造石墨、天然石墨、软炭、硬炭、硅基材料、锡基材料和钛酸锂等。硅基材料可选自单质硅、硅氧化合物、硅碳复合物、硅氮复合物以及硅合金中的至少一种。锡基材料可选自单质锡、锡氧化合物以及锡合金中的至少一种。但本申请并不限定于这些材料，还可以使用其他可被用作电池负极活性材料的传统材料。这些负极活性材料可以仅单独使用一种，也可以将两种以上组合使用。
在一些实施方式中，隔离件为隔离膜。本申请对隔离膜的种类没有特别的限制，可以选用任意公知的具有良好的化学稳定性和机械稳定性的多孔结构隔离膜。
作为示例，隔离膜的主要材质可选自玻璃纤维、无纺布、聚乙烯、聚丙烯及聚偏二氟乙烯，陶瓷中的至少一种。隔离膜可以是单层薄膜，也可以是多层复合薄膜，没有特别限制。在隔离膜为多层复合薄膜时，各层 的材料可以相同或不同，没有特别限制。隔离件可以是单独的一个部件位于正负极之间，也可以附着在正负极的表面。
在一些实施方式中，隔离件为固态电解质。固态电解质设于正极和负极之间，同时起到传输离子和隔离正负极的作用。
在一些实施方式中，电极组件为卷绕结构。正极片、负极片卷绕成卷绕结构。
在一些实施方式中，电极组件为叠片结构。
在一些实施方式中，电池单体可以包括外壳。外壳用于封装电极组件及电解质等部件。外壳可以为钢壳、铝壳、塑料壳(如聚丙烯)、复合金属壳(如铜铝复合外壳)或铝塑膜等。
在一些实施方式中，外壳包括端盖和壳体，壳体设有开口，端盖封闭开口以形成用于容纳电极组件和电解质等物质的密闭空间。壳体可设有一个或多个开口。端盖也可设置一个或者多个。
在一些实施方式中，外壳上设置有至少一个电极端子，电极端子与电极组件的极耳电连接。电极端子可以与极耳直接连接，也可以通过转接件与极耳间接连接。电极端子可以设置于端盖上，也可以设置在壳体上。
在一些实施方式中，外壳上设置有防爆阀。防爆阀用于泄放电池单体的内部压力。
电池技术的发展要同时考虑多方面的设计因素，例如，能量密度、放电容量、充放电倍率等性能参数，另外，还需要考虑电池的良品率。
电池的制造过程中，电极组件放入壳体内后，端盖封闭壳体的开口。在端盖与壳体装配过程中，端盖被压入壳体的开口。壳体包括底壁和侧壁，侧壁围设于底壁的周围，侧壁的一端连接于底壁，侧壁的另一端形成开口。以方壳电池单体为例，壳体包括沿第一方向相对设置的两个第一侧壁和沿第二方向相对设置的两个第二侧壁，第一侧壁的面积大于第二侧壁的面积。由于第一侧壁具有较大的面积、第一侧壁在第二方向上具有较大的尺寸，在端盖压入壳体时，第一侧壁在端盖的挤压力作用下容易产生变形，例如，第一侧壁容易朝向壳体的外部鼓起，使得端盖与壳体的连接失效，导致产品的良品率较低。
鉴于此，为了解决端盖压入壳体、导致壳体变形，使得产品的良品率交底的问题，本申请实施例提供了一种技术方案，压装校正装置包括两个校正模块和驱动机构，驱动机构用于驱动两个校正模块沿第一方向相互靠近或远离，校正模块用于作用于第一侧壁，以在端盖压入壳体时，对壳体的面积较大的侧壁约束，降低壳体产生形变的风险，从而提高压装产品的良品率。
采用上述的压装校正装置，通过两个校正模块对壳体的面积较大的第一侧壁进行校正，在端盖被压入壳体内时，由于校正模块作用于第一侧 壁，校正模块能够对第一侧壁约束，以约束第一侧壁朝向壳体的外部变形，从而降低第一侧壁变形的概率，使得端盖与壳体装配后的产品具有较高的良品率。
请参照图1，图1为本申请一些实施例提供的电池单体的爆炸图。如图1所示，电池单体100包括壳体11、端盖12、电极组件13及其他功能性部件。壳体11具有开口，端盖12封闭开口，以将电池单体100的内部环境与外部环境隔绝。
壳体11是用于配合端盖12以形成电池单体100的内部环境的组件，其中，形成的内部环境可以用于容纳电极组件13、电解液以及其他部件。壳体11和端盖12可以是独立的部件。壳体11可以是多种形状和多种尺寸的。具体地，壳体11的形状可以根据电极组件13的具体形状和尺寸大小来确定。壳体11的材质可以是多种，比如，铜、铁、铝、不锈钢、铝合金、塑胶等。
端盖12是指盖合于壳体11的开口处以将电池单体100的内部环境隔绝于外部环境的部件。不限地，端盖12的形状可以与壳体11的形状相适应以配合壳体11。可选地，端盖12可以由具有一定硬度和强度的材质(如铝合金)制成，这样，端盖12在受挤压碰撞时就不易发生形变，使电池单体100能够具备更高的结构强度，可靠性也可以有所提高。端盖12上可以设置有如电极端子14等的功能性部件。电极端子14可以用于与电极组件13电连接，以用于输出或输入电池单体100的电能。端盖12的材质也可以是多种的，比如，铜、铁、铝、不锈钢、铝合金、塑胶等，本申请实施例对此不作特殊限制。在一些实施例中，在端盖12的内侧还可以设置有绝缘结构，绝缘结构可以用于隔离壳体11内的电连接部件与端盖12，以降低短路的风险。示例性的，绝缘结构可以是塑料、橡胶等。
电极组件13是电池单体100中发生电化学反应的部件。壳体11内可以包含一个或更多个电极组件13。电极组件13主要由正极极片和负极极片卷绕或层叠放置形成，并且通常在正极极片与负极极片之间设有隔离膜，隔离膜用于分隔正极极片和负极极片，以避免正极极片和负极极片内接短路。正极极片和负极极片具有活性物质的部分构成电极组件13的主体部，正极极片和负极极片不具有活性物质的部分各自构成极耳。正极极耳和负极极耳可以共同位于主体部的一端或是分别位于主体部的两端。在电池的充放电过程中，正极活性物质和负极活性物质与电解液发生反应，极耳连接电极端子14以形成电流回路。
请参照图2至图6，图2为本申请一些实施例提供的压装校正装置的结构示意图，图3为本申请另一些实施例提供的压装校正装置的结构示意图，图4为本申请一些实施例提供的压装校正装置的部分结构的立体图，图5为本申请一些实施例提供的校正模块与壳体的配合示意图，图6为本 申请另一些实施例提供的校正模块与壳体的配合示意图。根据本申请的一些实施例，本申请实施例提供了一种压装校正装置200，用于在电池单体100的端盖12压入壳体11时，对壳体11进行校正，壳体11包括沿第一方向X相对设置的两个第一侧壁111和沿第二方向Y相对设置的两个第二侧壁112，第二方向Y与第一方向X垂直，第一侧壁111的面积大于第二侧壁112的面积。该压装校正装置200包括两个校正模块21和驱动机构22，两个校正模块21沿第一方向X相对设置，两个校正模块21用于作用于两个第一侧壁111；驱动机构22用于驱动两个校正模块21沿第一方向X相互靠近或远离，以使每个校正模块21对对应的第一侧壁111进行校正。
图中，字母X所指示的方向为第一方向，字母Y所指示的方向为第二方向Y，字母Z所指示的方向为第三方向。第三方向Z可以为端盖12压入壳体11的方向。第一方向X、第二方向Y及第三方向Z两两垂直。第一方向X可以为电池单体100的长度方向，第二方向Y可以为电池单体100的厚度方向，第三方向Z可以为电池单体100的高度方向。
第一侧壁111在Z方向上的尺寸与第二侧壁112在第三方向Z上的尺寸相同，第一侧壁111在第二方向Y上的尺寸可以大于第二侧壁112在第一方向X上的尺寸。当端盖12压入壳体11的开口时，第一侧壁111在端盖12的作用下，容易在第二方向Y上产生变形。校正模块21作用于第一侧壁111，能够对第一侧壁111起到约束作用，以降低第一侧壁111变形的概率。
两个校正模块21沿第一方向X相对设置，两个校正模块21之间形成夹持空间，壳体11能够容纳于该夹持空间内。
驱动机构22为驱动两个校正模块21相互靠近或远离的机构。驱动机构22可以为直线驱动机构，如，气缸、油缸、电推杆等。或者，驱动机构22还可以包括电机和传动组件，电机驱动传动组件带动两个校正模块21相互靠近或远离。
在一些实施例中，驱动机构22的数量可以为一个，也可以为两个。当驱动机构22的数量为一个时，该驱动机构22驱动两个校正模块21沿第一方向X相互靠近或远离。当驱动机构22的数量为两个时，两个驱动机构22分别驱动两个校正模块21沿第一方向X相互靠近或远离。
可选地，如图2和图3所示，驱动机构22的数量为两个时，每个驱动机构22与一个校正模块21连接，驱动机构22用于驱动对应的校正模块21朝向另一校正模块21移动或背离另一个校正模块21移动。
当壳体11上料至压装工位时，两个校正模块21之间具有较大的间隙，壳体11放置于两个校正模块21之间的夹持空间内，驱动机构22驱动两个校正模块21相互靠近，以使两个校正模块21分别与两个第一侧壁111接触。
根据本申请实施例的压装校正装置200，通过将两个校正模块21作用于壳体11的面积较大的两个第一侧壁111，以在端盖12压入壳体11时，对第一侧壁111进行校正，约束第一侧壁111朝背离壳体11内部的方向变形，使得壳体11与端盖12连接可靠，提高压装产品的良品率。
请参照图5和图6，根据本申请的一些实施例，每个校正模块21包括基座211和设置于基座211的校正块212，沿第一方向X，校正块212凸出于基座211，校正块212用于与第一侧壁111接触。
基座211作为校正块212的定位基础，基座211可以位于校正块212的背离第一侧壁111的一侧，基座211的体积可以大于校正块212的体积。
基座211和校正块212可以分体设置，便于加工制造。校正块212与基座211的连接方式可以为多种，例如，校正块212可以与基座211卡接连接、铆接连接、螺纹连接、热熔连接、焊接连接等。
校正块212沿第一方向X凸出于基座211，可以为，基座211具有面向第一侧壁111的第一表面，校正块212凸设于第一表面。在校正块212与第一侧壁111接触时，基座211与第一侧壁111不接触。例如，当校正模块21设置于壳体11的靠近开口的位置时，基座211的一部分可以设置于远离壳体11的位置，校正块212可以与第一侧壁111的靠近开口的位置接触，由于基座211与第一侧壁111不接触，能够降低端盖12与壳体11装配时，基座211与其他部件(如压装部件、端盖12等)的干涉。
在上述方案中，基座211用于对校正块212提供定位基础，校正块212凸出于基座211，基座211可以不与壳体11接触，校正块212可以设置于壳体11的开口附近，以降低基座211与其他部件的干涉，便于端盖12压入壳体11。
请参照图2和图5，根据本申请的一些实施例，沿第一方向X，校正块212在第一侧壁111上的正投影沿第二方向Y覆盖第一侧壁111。
校正块212沿第一方向X在第一侧壁111上的正投影是指，沿第一方向X观察，校正块212落入第一侧壁111上的投影。
校正块212在第一侧壁111上的正投影在第二方向Y上覆盖第一侧壁111，是指，校正块212在第二方向Y上的尺寸可以等于或大于第一侧壁111在第二方向Y上的尺寸。
在上述方案中，校正块212在第二方向Y上具有较大的尺寸，能够在第二方向Y上覆盖第一侧壁111，以在第二方向Y上对第一侧壁111具有较好的约束效果。
请参照图2和图5，根据本申请的一些实施例，校正块212呈长方体，校正块212的长度方向与第二方向Y平行。
校正块212呈长方体，校正块212的长度方向与第二方向Y平行， 校正块212的宽度方向可以与第三方向Z平行，以使得校正块212的面积较大的面朝向第一侧壁111设置，以使得校正块212与第一侧壁111具有较大的接触面积。
在上述方案中，校正块212呈长方体，且校正块212的长度方向与第二方向Y平行，一方面使得校正块212能够与第一侧壁111之间具有较大的接触面积，使得校正块212对第一侧壁111具有较好的约束效果，另一方面便于加工制造。
根据本申请的一些实施例，校正块212与基座211可拆卸地连接。
校正块212与基座211的连接方式可以为，校正块212与基座211螺纹连接，或者，校正块212与基座211卡接连接，例如，校正块212设置有凸出部，基座211设置有与凸出部对应的凹陷部，凸出部嵌入凹陷部内。
可选地，校正块212设置有第一安装孔，基座211设置有第二安装孔，基座211与校正块212通过穿设于第二安装孔和第一安装孔的螺纹件螺纹连接。
在上述方案中，校正块212与基座211可拆卸地连接，以便于更换，或适配不同规格的电池单体100。
请参照图3、图4和图6，根据本申请的一些实施例，校正块212的数量为多个，多个校正块212沿第二方向Y间隔设置。
多个校正块212沿第二方向Y间隔设置，沿第一方向X观察，多个校正块212在第一侧壁111上的正投影在第二方向Y上覆盖第一侧壁111。也即，多个校正块212在第二方向Y上的覆盖范围大于或等于第一侧壁111在第二方向Y上的尺寸。
多个校正块212沿第二方向Y间隔设置，可以为，多个校正块212沿第二方向Y等间距设置，也可以为，多个校正块212沿第二方向Y不等间距设置。
沿第二方向Y，多个校正块212的尺寸可以相等，也可以不等。在一些实施例中，多个校正块212在第二方向Y上的尺寸相等，便于加工制造。
在上述方案中，多个校正块212沿第二方向Y间隔设置，使得校正模块21在第二方向Y上与第一侧壁111具有多个接触位置，以对第一侧壁111具有较好的约束效果。
请参照图3和图6，根据本申请的一些实施例，基座211包括多个凸出部2111，每个校正块212设置于一个凸出部2111。
凸出部2111为设置校正块212的基础，每个校正块212与一个凸出部2111对应设置，使得多个凸出部2111可以沿第二方向Y间隔设置。
多个凸出部2111位于基座211的面向第一侧壁111的一侧，以 便于安装校正块212，以使得校正块212能够与第一侧壁111接触，基座211不与第一侧壁111接触。
多个凸出部2111可以沿第二方向Y等间距设置，以便于加工制造。
在上述方案中，基座211包括多个凸出部2111，每个凸出部2111与一个校正块212对应，以便于实现对多个校正块212的安装定位，并且能够减轻基座211的重量。
根据本申请的一些实施例，每个校正块212与对应的凸出部2111可拆卸地连接。
每个校正块212与对应的凸出部2111的连接方式可以为多种，例如，校正块212与基座211螺纹连接，或者，校正块212与基座211卡接连接，例如，校正块212设置有凸出部2111，基座211设置有与凸出部2111对应的凹陷部，凸出部2111嵌入凹陷部内。
可选地，校正块212设置有第一安装孔，凸出部2111设置有与第一安装孔对应的第二安装孔，第二安装孔为沿第一方向X贯穿基座211的通孔，凸出部2111与校正块212通过穿设于第二安装孔和第一安装孔的螺纹件(如螺栓)螺纹连接。
在上述方案中，每个校正块212与对应的凸出部2111可拆卸地连接，以便于校正块212更换。
请参照图6，根据本申请的一些实施例，多个校正块212包括两个端部校正块2121和至少一个中部校正块2122，两个端部校正块2121分别设置于基座211的沿第二方向Y的两端，沿第二方向Y，至少一个中部校正块2122位于两个端部校正块2121之间。
两个端部校正块2121分别设置于基座211的沿第二方向Y的两端，沿第一方向X观察，两个端部校正块2121在第一侧壁111上的正投影与第一侧壁111的沿第二方向Y的两个端部边缘重叠，以使得两个端部校正块2121能够对应第一侧壁111的沿第二方向Y的两端。也即，沿第二方向Y，其中一个端部校正块2121可以超出第一侧壁111对应的在第二方向Y上的端部边缘，或者，该端部校正块2121可以与第一侧壁111对应的在第二方向Y上的端部边缘齐平，以使得端部校正块2121与第一侧壁111对应的在第二方向Y上的端部具有较大的接触面积，以能够对第一侧壁111的端部具有较好的约束效果。
中部校正块2122的数量可以为一个、两个、三个或更多个。可选地，如图6所示，中部校正块2122的数量为三个。
在一些实施例中，每个校正块212在第二方向Y上的尺寸可以小于在第三方向Z上的尺寸。也即，每个校正块212可以呈长方体，校正块212的长度方向与第三方向Z平行，校正块212的宽度方向与第二方向Y 平行。
校正块212与第一侧壁111接触的表面可以为平面，以使得校正块212可以与第一侧壁111具有较大的接触面积。
在上述方案中，两个端部校正块2121和至少一个中部校正块2122能够分别对应第一侧壁111在第二方向Y上的端部和中部，以对第一侧壁111的不同部位具有较好的约束效果。
根据本申请的一些实施例，沿第一方向X，两个校正模块21的多个校正块212的投影相互重叠。
沿第一方向X，两个校正模块21的多个校正块212的投影相互重叠，是指，两个校正模块21的多个校正块212可以完全重叠，也可以部分重叠。
例如，两个校正模块21为相同的结构，两个校正模块21关于两个校正模块21连线的中垂线对称设置。又例如，两个校正模块21为不同的结构，两个校正模块21上的多个校正块212错位设置。
在上述方案中，沿第一方向X观察，两个校正模块21的多个校正块212相互重叠，便于加工制造，并且壳体11受到的两个校正模块21的作用力均衡。
在另一些实施例中，沿第一方向X，两个校正模块21的多个校正块212的投影相离。也即，沿第一方向X观察，两个校正模块21的多个校正块212不重叠。
根据本申请的一些实施例，基座211的材质为金属；和/或校正块212的材质为聚甲醛。
基座211的材质为金属，具有较高的强度。基座211的材质可以但不限于为不锈钢、铝、铝合金等。
聚甲醛(POM)，又名缩醛树脂、聚氧化亚甲基，聚缩醛，是热塑性结晶性高分子聚合物，被誉为“超钢”或者“赛钢”，缩醛树脂是强而硬且有良好疲劳性和热稳定性的热塑性塑料，它电具有低的摩擦系数和良好的耐热性。聚甲醛具有硬度高、韧性高、表面光滑等特性，降低对壳体11的损伤。
根据本申请的一些实施例，本申请实施例还提供了一种电池制造设备，其包括如上述任一实施例提供的压装校正装置200。
电池制造设备还包括端盖12压装装置，端盖12压装装置用于在压装工位将端盖12压入壳体11的开口，以封闭该开口。
压装校正装置200设置于压装工位，在壳体11上料至压装工位后，两个校正模块21在驱动机构22的作用下分别与两个第一侧壁111接触。端盖12压装装置将端盖12压入壳体11的开口，在压装过程中，校正模块21作用于第一侧壁111，以约束第一侧壁111朝向背离壳体11内部 的变形，以使得端盖12与壳体11连接可靠，提高压装产品的良品率。
根据本申请的一些实施例，请参照图1至图6，本申请实施例提供了一种压装校正装置200，该压装校正装置200用于在电池单体100的端盖12压入壳体11时，对壳体11进行校正。压装校正装置200包括两个校正模块21和驱动机构22，沿第一方向X相对设置，两个校正模块21用于作用于两个第一侧壁111；驱动机构22用于驱动两个校正模块21沿第一方向X相互靠近或远离，以使每个校正模块21对对应的第一侧壁111进行校正。每个校正模块21包括基座211和设置于基座211的校正块212，沿第一方向X，校正块212凸出于基座211，校正块212用于与第一侧壁111接触。沿第一方向X，校正块212在第一侧壁111上的正投影在第二方向Y上覆盖第一侧壁111。
在一些实施例中，每个校正模块21包括一个校正块212，校正块212呈长方体，校正块212的长度方向与第二方向Y平行。
在一些实施例中，每个校正模块21包括多个校正块212，多个校正块212沿第二方向Y间隔设置。沿第一方向X，两个校正模块21的多个校正块212的投影相互重叠。
上述实施例中，校正块212与基座211可拆卸地连接，以便于校正块212的更换。
采用上述的压装校正装置200，通过两个校正模块21对壳体11的面积较大的第一侧壁111进行校正，在端盖12被压入壳体11内时，由于校正模块21作用于第一侧壁111，校正模块21能够对第一侧壁111约束，以约束第一侧壁111朝向壳体11的外部变形，从而降低第一侧壁111变形的概率，使得端盖12与壳体11装配后的产品具有较高的良品率。
虽然已经参考优选实施例对本申请进行了描述，但在不脱离本申请的范围的情况下，可以对其进行各种改进并且可以用等效物替换其中的部件。尤其是，只要不存在结构冲突，各个实施例中所提到的各项技术特征均可以任意方式组合起来。本申请并不局限于文中公开的特定实施例，而是包括落入权利要求的范围内的所有技术方案。

Claims (12)

  1. 一种压装校正装置，用于在电池单体的端盖压入壳体时，对所述壳体进行校正，所述壳体包括沿第一方向相对设置的两个第一侧壁和沿第二方向相对设置的两个第二侧壁，所述第二方向与所述第一方向垂直，所述第一侧壁的面积大于所述第二侧壁的面积，所述压装校正装置包括：
    两个校正模块，沿所述第一方向相对设置，所述两个校正模块用于作用于所述两个第一侧壁；
    驱动机构，用于驱动所述两个校正模块沿所述第一方向相互靠近或远离，以使每个所述校正模块对对应的所述第一侧壁进行校正。
  2. 根据权利要求1所述的压装校正装置，其中，每个所述校正模块包括基座和设置于所述基座的校正块，沿所述第一方向，所述校正块凸出于所述基座，所述校正块用于与所述第一侧壁接触。
  3. 根据权利要求2所述的压装校正装置，其中，沿所述第一方向，所述校正块在所述第一侧壁上的正投影在所述第二方向上覆盖所述第一侧壁。
  4. 根据权利要求3所述的压装校正装置，其中，所述校正块呈长方体，所述校正块的长度方向与所述第二方向平行。
  5. 根据权利要求4所述的压装校正装置，其中，所述校正块与所述基座可拆卸地连接。
  6. 根据权利要求2所述的压装校正装置，其中，所述校正块的数量为多个，多个所述校正块沿所述第二方向间隔设置。
  7. 根据权利要求6所述的压装校正装置，其中，所述基座包括多个凸出部，每个所述校正块设置于一个所述凸出部。
  8. 根据权利要求7所述的压装校正装置，其中，每个所述校正块与对应的所述凸出部可拆卸地连接。
  9. 根据权利要求6-8中任一项所述的压装校正装置，其中，多个所述校正块包括两个端部校正块和至少一个中部校正块，所述两个端部校正块分别设置于所述基座的沿所述第二方向的两端，沿所述第二方向，所述至少一个中部校正块位于所述两个端部校正块之间。
  10. 根据权利要求6-9中任一项所述的压装校正装置，其中，沿所述第一方向，所述两个校正模块的多个所述校正块的投影相互重叠。
  11. 根据权利要求2-10中任一项所述的压装校正装置，其中，所述基座的材质为金属；和/或
    所述校正块的材质为聚甲醛。
  12. 一种电池制造设备，包括如权利要求1-11中任一项所述的压装校正装置。
PCT/CN2024/073105 2023-07-28 2024-01-18 压装校正装置及电池制造设备 WO2025025534A1 (zh)

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