CN219945195U - Press mounting correction device and battery manufacturing equipment - Google Patents

Abstract

The embodiment of the utility model provides a press-fit correction device and battery manufacturing equipment. And the press-fit correction device is used for correcting the shell when the end cover of the battery cell is pressed into the shell, the shell comprises two first side walls which are oppositely arranged along the first direction and two second side walls which are oppositely arranged along the second direction, the second direction is perpendicular to the first direction, and the area of the first side walls is larger than that of the second side walls. The press-fit correction device comprises two correction modules and a driving mechanism, wherein the two correction modules are oppositely arranged along a first direction and are used for acting on two first side walls; the driving mechanism is used for driving the two correction modules to be close to or far away from each other along a first direction so as to enable each correction module to correct the corresponding first side wall. The technical scheme of the utility model can improve the yield of the press-fit product.

Description

Press mounting correction device and battery manufacturing equipment

Technical Field

The utility model relates to the technical field of battery manufacturing, in particular to a press-fit correction device and battery manufacturing equipment.

Background

Energy conservation and emission reduction are key to sustainable development of the automobile industry, and electric vehicles become an important component of sustainable development of the automobile industry due to the energy conservation and environmental protection advantages of the electric vehicles. For electric vehicles, battery technology is an important factor in the development of the electric vehicles.

In the manufacturing process of the battery, the yield of the battery is a non-negligible problem. Therefore, how to improve the yield of the battery is a technical problem to be solved in the battery technology.

Disclosure of Invention

The utility model provides a press-fit correction device and battery manufacturing equipment, which can improve the yield of products.

The utility model is realized by the following technical scheme:

in a first aspect, an embodiment of the present utility model provides a press-fit correction device, configured to correct a case when an end cap of a battery cell is pressed into the case, where the case includes two first side walls disposed opposite to each other along a first direction and two second side walls disposed opposite to each other along a second direction, the second direction is perpendicular to the first direction, and an area of the first side walls is larger than an area of the second side walls. The press-fit correction device comprises two correction modules and a driving mechanism, wherein the two correction modules are oppositely arranged along a first direction and are used for acting on two first side walls; the driving mechanism is used for driving the two correction modules to be close to or far away from each other along a first direction so as to enable each correction module to correct the corresponding first side wall.

According to the press-fit correction device provided by the embodiment of the utility model, the two correction modules act on the two first side walls with larger areas of the shell, so that when the end cover is pressed into the shell, the first side walls are corrected, the first side walls are restrained from deforming towards the direction deviating from the interior of the shell, the shell is reliably connected with the end cover, and the yield of press-fit products is improved.

According to some embodiments of the utility model, each calibration module includes a base and a calibration block disposed on the base, the calibration block protruding from the base along a first direction, the calibration block being configured to contact the first sidewall.

In the above scheme, the base is used for providing the location basis to the correction piece, and the correction piece protrusion is in the base, and the base can not contact with the casing, and the correction piece can set up near the opening of casing to reduce the interference of base and other parts, the end cover of being convenient for is impressed the casing.

According to some embodiments of the utility model, an orthographic projection of the correction block on the first sidewall in the first direction covers the first sidewall in the second direction.

In the above scheme, the correction block has a larger size in the second direction, and can cover the first side wall in the second direction, so that the correction block has a better constraint effect on the first side wall in the second direction.

According to some embodiments of the utility model, the correction block is rectangular, and the length direction of the correction block is parallel to the second direction.

In the scheme, the correction block is cuboid, and the length direction of the correction block is parallel to the second direction, so that on one hand, the correction block can have a larger contact area with the first side wall, and has a better constraint effect on the first side wall, and on the other hand, the correction block is convenient to process and manufacture.

According to some embodiments of the utility model, the calibration block is removably coupled to the base.

In the scheme, the correction block is detachably connected with the base so as to be convenient to replace or adapt to battery cells with different specifications.

According to some embodiments of the utility model, the number of correction blocks is a plurality, the plurality of correction blocks being arranged at intervals along the second direction.

In the above scheme, the plurality of correction blocks are arranged at intervals along the second direction, so that the correction modules have a plurality of contact positions with the first side wall in the second direction, and the first side wall is better in constraint effect.

According to some embodiments of the utility model, the base includes a plurality of protrusions, each of the calibration blocks being disposed on one of the protrusions.

In the above-described aspect, the base includes the plurality of protruding portions, each protruding portion corresponding to one correction block, so that the mounting and positioning of the plurality of correction blocks are realized, and the weight of the base can be reduced.

According to some embodiments of the utility model, each correction block is detachably connected with a corresponding projection.

In the above-described aspect, each correction block is detachably connected with the corresponding projection to facilitate the correction block replacement.

According to some embodiments of the utility model, the plurality of correction blocks includes two end correction blocks and at least one middle correction block, the two end correction blocks are respectively disposed at two ends of the base along a second direction, and the at least one middle correction block is disposed between the two end correction blocks along the second direction.

In the above scheme, the two end correction blocks and the 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 that the different parts of the first side wall are better restrained.

According to some embodiments of the utility model, projections of the plurality of correction blocks of the two correction modules overlap each other in the first direction.

In the above scheme, the plurality of correction blocks of the two correction modules are mutually overlapped as seen in the first direction, so that the processing and the manufacturing are facilitated, and the acting forces of the two correction modules received by the shell are balanced.

According to some embodiments of the utility model, the base is made of metal; and/or the material of the correction block is polyoxymethylene.

In the scheme, the base is made of metal, so that the strength is high; the correction block is made of polyoxymethylene, has the characteristics of high hardness, high toughness, smooth surface and the like, and reduces damage to the shell.

In a second aspect, an embodiment of the present utility model further provides a battery manufacturing apparatus, which includes the press-fit correction device provided in any one of the above embodiments.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is an exploded view of a battery cell according to some embodiments of the present utility model;

fig. 2 is a schematic structural diagram of a press-fit correction device according to some embodiments of the present utility model;

FIG. 3 is a schematic diagram of a press-fitting correction device according to other embodiments of the present utility model;

FIG. 4 is a perspective view of a portion of a press-fit correction device according to some embodiments of the present utility model;

FIG. 5 is a schematic diagram illustrating the cooperation between a calibration module and a housing according to some embodiments of the present utility model;

fig. 6 is a schematic diagram illustrating the matching of the calibration module and the housing according to another embodiment of the utility model.

Icon: 100-battery cells; 11-a housing; 111-a first sidewall; 112-a second sidewall; 12-end caps; 13-an electrode assembly; 14-electrode terminals; 200-press fitting correction device; a 21-correction module; 211-a base; 2111-a protrusion; 212-a correction block; 2121-end correction block; 2122-middle correction block; 22-a driving mechanism; x-a first direction; y-a second direction; z-third direction.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model; the terms "comprising" and "having" and any variations thereof in the description of the utility model and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion. The terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the described embodiments of the utility model may be combined with other embodiments.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "attached" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The term "and/or" in the present utility model is merely an association relation describing the association object, and indicates that three kinds of relations may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In the present utility model, the character "/" generally indicates that the front and rear related objects are an or relationship.

The term "plurality" as used herein means two or more (including two), and similarly, "plural sets" means two or more (including two), and "plural sheets" means two or more (including two).

In some embodiments, the battery may be a battery module, and when there are a plurality of battery cells, the plurality of battery cells are arranged and fixed to form one battery module.

In some embodiments, the battery may be a battery pack including a case and a battery cell, the battery cell or battery module being housed in the case.

In some embodiments, the tank may be part of the chassis structure of the vehicle. For example, a portion of the tank may become at least a portion of the floor of the vehicle, or a portion of the tank may become at least a portion of the cross member and the side member of the vehicle.

In some embodiments, the battery may be an energy storage device. The energy storage device comprises an energy storage container, an energy storage electric cabinet and the like.

In the embodiment of the utility model, the battery cell can be a secondary battery, and the secondary battery refers to a battery cell which can activate the active material in a charging mode to continue to use after the battery cell discharges.

The battery cell may be, but is not limited to, a lithium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, and the like.

The battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge of the battery cell, active ions (e.g., lithium ions) are inserted and extracted back and forth between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode, can play a role in preventing the positive electrode and the negative electrode from being short-circuited, and can enable active ions to pass through.

In some embodiments, the positive electrode may be a positive electrode sheet, which 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.

As an example, the positive electrode current collector has two surfaces opposing in its own thickness direction, and the positive electrode active material is provided on either or both of the two surfaces opposing the positive electrode current collector.

As an example, the positive electrode current collector may employ a metal foil or a composite current collector. For example, as the metal foil, surface-silver-treated aluminum, surface-silver-treated stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel, titanium, or the like can be used. The composite current collector may include a polymeric material base layer and a metal layer. The composite current collector may be formed by forming a metal material (aluminum, aluminum alloy, nickel alloy, titanium alloy, silver alloy, etc.) on a polymer material substrate (e.g., a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

As an example, 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. However, the present utility model is not limited to these materials, and other conventional materials that can be used as a battery positive electrode active material may be used.

In some embodiments, the negative electrode may be a negative electrode tab, which may include a negative electrode current collector.

As an example, the negative electrode current collector may employ a metal foil or a composite current collector. For example, as the metal foil, surface-silver-treated aluminum, surface-silver-treated stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel, titanium, or the like can be used.

In some embodiments, the anode current collector has two surfaces opposing in a thickness direction thereof, and the anode active material is provided on either or both of the two surfaces opposing the anode current collector.

As an example, a negative electrode active material for a battery known in the art may be used. As an example, the anode 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, lithium titanate, and the like. The silicon-based material may be at least one selected from elemental silicon, silicon oxygen compounds, silicon carbon composites, silicon nitrogen composites, and silicon alloys. The tin-based material may be at least one selected from elemental tin, tin oxide, and tin alloys. However, the present utility model is not limited to these materials, and other conventional materials that can be used as a battery anode active material may be used. These negative electrode active materials may be used alone or in combination of two or more.

In some embodiments, the separator is a separator film. The type of the separator is not particularly limited, and any known porous separator having good chemical stability and mechanical stability can be used.

As an example, the main material of the separator may be at least one selected from glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic. The separator may be a single-layer film or a multilayer composite film, and is not particularly limited. When the separator is a multilayer composite film, the materials of the respective layers may be the same or different, and are not particularly limited. The separator may be a single member located between the positive and negative electrodes, or may be attached to the surfaces of the positive and negative electrodes.

In some embodiments, the separator is a solid state electrolyte. The solid electrolyte is arranged between the anode and the cathode and plays roles in transmitting ions and isolating the anode and the cathode.

In some embodiments, the electrode assembly is a rolled structure. The positive plate and the negative plate are wound into a winding structure.

In some embodiments, the electrode assembly is a lamination stack.

In some embodiments, the battery cell may include a housing. The case is used to encapsulate the electrode assembly, the electrolyte, and the like. The shell can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), an aluminum-plastic film or the like.

In some embodiments, the case includes an end cap and a case, the case is provided with an opening, and the end cap closes the opening to form a closed space for accommodating the electrode assembly, electrolyte, and the like. The housing may be provided with one or more openings. One or more end caps may also be provided.

In some embodiments, at least one electrode terminal is provided on the case, and the electrode terminal is electrically connected with the tab of the electrode assembly. The electrode terminal may be directly connected to the tab, or may be indirectly connected to the tab through the adapter. The electrode terminal may be provided on the terminal cover or may be provided on the case.

In some embodiments, an explosion proof valve is provided on the housing. The explosion-proof valve is used for discharging the internal pressure of the battery cell.

The development of battery technology is to consider various design factors, such as energy density, discharge capacity, charge-discharge rate, and other performance parameters, and also consider the yield of the battery.

In the manufacturing process of the battery, after the electrode assembly is placed in the case, the end cap closes the opening of the case. During assembly of the end cap with the housing, the end cap is pressed into the opening of the housing. The casing includes diapire and lateral wall, and the lateral wall encloses around locating the diapire, and the one end of lateral wall is connected in the diapire, and the other end of lateral wall forms the opening. Taking a square shell battery cell as an example, the shell comprises two first side walls which are oppositely arranged along a first direction and two second side walls which are oppositely arranged along a second direction, and the area of the first side walls is larger than that of the second side walls. Because the first side wall has a larger area, and the first side wall has a larger size in the second direction, when the end cover is pressed into the shell, the first side wall is easy to deform under the extrusion force of the end cover, for example, the first side wall is easy to bulge towards the outside of the shell, so that the connection between the end cover and the shell fails, and the yield of products is lower.

In view of the above, in order to solve the problem that the end cover is pressed into the shell to deform the shell, so that the yield of the product is low, the embodiment of the utility model provides a technical scheme, the press-fit correction device comprises two correction modules and a driving mechanism, the driving mechanism is used for driving the two correction modules to be close to or far away from each other along a first direction, and the correction modules are used for acting on a first side wall so as to restrict the side wall with larger area of the shell when the end cover is pressed into the shell, and reduce the risk of deformation of the shell, thereby improving the yield of the press-fit product.

Adopt foretell pressure equipment correcting unit, correct the great first lateral wall of area of casing through two correction modules, when the end cover was pressed in the casing, because correction module acts on first lateral wall, correction module can be retrained first lateral wall to retrained first lateral wall towards the outside deformation of casing, thereby reduce the probability that first lateral wall warp, make the product after end cover and the casing assembly have higher yields.

Referring to fig. 1, fig. 1 is an exploded view of a battery cell according to some embodiments of the present utility model. As shown in fig. 1, the battery cell 100 includes a case 11, an end cap 12, an electrode assembly 13, and other functional components. The case 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 case 11 is an assembly for mating with the end cap 12 to form an internal environment of the battery cell 100, wherein the formed internal environment may be used to house the electrode assembly 13, electrolyte, and other components. The housing 11 and the end cap 12 may be separate components. The housing 11 may be of various shapes and sizes. Specifically, the shape of the case 11 may be determined according to the specific shape and size of the electrode assembly 13. The material of the housing 11 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

The end cap 12 refers to a member that is covered at the opening of the case 11 to isolate the internal environment of the battery cell 100 from the external environment. Without limitation, the shape of the end cap 12 may be adapted to the shape of the housing 11 to fit the housing 11. Alternatively, the end cap 12 may be made of a material having a certain hardness and strength (such as an aluminum alloy), so that the end cap 12 is not easily deformed when being extruded and collided, so that the battery cell 100 can have a higher structural strength, and the reliability can be improved. The end cap 12 may be provided with functional parts such as electrode terminals 14. The electrode terminals 14 may be used to be electrically connected with the electrode assembly 13 for outputting or inputting electric power of the battery cell 100. The material of the end cap 12 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present utility model is not limited thereto. In some embodiments, an insulating structure may also be provided on the inside of the end cap 12, which may be used to isolate electrical connection components within the housing 11 from the end cap 12 to reduce the risk of short circuits. By way of example, the insulating structure may be plastic, rubber, or the like.

The electrode assembly 13 is a component in which electrochemical reactions occur in the battery cell 100. One or more electrode assemblies 13 may be contained within the case 11. The electrode assembly 13 is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is generally disposed between the positive electrode sheet and the negative electrode sheet, and is used for separating the positive electrode sheet and the negative electrode sheet so as to avoid an internal short circuit between the positive electrode sheet and the negative electrode sheet. The portions of the positive electrode sheet and the negative electrode sheet having active materials constitute the main body portion of the electrode assembly 13, and the portions of the positive electrode sheet and the negative electrode sheet having no active materials constitute the tabs, respectively. The positive electrode tab and the negative electrode tab may be located at one end of the main body portion together or located at two ends of the main body portion respectively. During charge and discharge of the battery, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tab is connected to the electrode terminal 14 to form a current loop.

Referring to fig. 2 to 6, fig. 2 is a schematic structural diagram of a press-fit correction device according to some embodiments of the present utility model, fig. 3 is a schematic structural diagram of a press-fit correction device according to other embodiments of the present utility model, fig. 4 is a perspective view of a portion of a structure of a press-fit correction device according to some embodiments of the present utility model, fig. 5 is a schematic matching diagram of a correction module according to some embodiments of the present utility model with a housing, and fig. 6 is a schematic matching diagram of a correction module according to other embodiments of the present utility model with a housing. According to some embodiments of the present utility model, a press-fit correction device 200 is provided for correcting a case 11 when an end cap 12 of a battery cell 100 is pressed into the case 11, wherein the case 11 includes two first side walls 111 disposed opposite to each other along a first direction X and two second side walls 112 disposed opposite to each other along a second direction Y, the second direction Y being perpendicular to the first direction X, and an area of the first side walls 111 is larger than an area of the second side walls 112. The press-fitting correction device 200 comprises two correction modules 21 and a driving mechanism 22, wherein the two correction modules 21 are oppositely arranged along a first direction X, and the two correction modules 21 are used for acting on the two first side walls 111; the driving mechanism 22 is used for driving the two correction modules 21 to approach or separate from each other along the first direction X, so that each correction module 21 corrects the corresponding first sidewall 111.

In the figure, the direction indicated by the letter X is the first direction, the direction indicated by the letter Y is the second direction Y, and the direction indicated by the letter Z is the third direction. The third direction Z may be the direction in which the end cap 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 a length direction of the battery cell 100, the second direction Y may be a thickness direction of the battery cell 100, and the third direction Z may be a height direction of the battery cell 100.

The dimension of the first sidewall 111 in the Z direction is the same as the dimension of the second sidewall 112 in the third direction Z, and the dimension of the first sidewall 111 in the second direction Y may be greater than the dimension of the second sidewall 112 in the first direction X. When the end cap 12 is pressed into the opening of the housing 11, the first side wall 111 is easily deformed in the second direction Y by the end cap 12. The correction module 21 acts on the first side wall 111 and can act as a constraint on the first side wall 111 to reduce the probability of deformation of the first side wall 111.

The two correction modules 21 are disposed opposite to each other along the first direction X, and a clamping space is formed between the two correction modules 21, in which the housing 11 can be accommodated.

The driving mechanism 22 is a mechanism that drives the two correction modules 21 toward or away from each other. The drive mechanism 22 may be a linear drive mechanism, such as a cylinder, electric pushrod, or the like. Alternatively, the driving mechanism 22 may further include a motor and a transmission assembly, where the motor drives the transmission assembly to move the two calibration modules 21 toward or away from each other.

In some embodiments, the number of drive mechanisms 22 may be one or two. When the number of driving mechanisms 22 is one, the driving mechanisms 22 drive the two correction modules 21 toward or away from each other in the first direction X. When the number of the driving mechanisms 22 is two, the two driving mechanisms 22 drive the two correction modules 21 toward or away from each other in the first direction X, respectively.

Alternatively, as shown in fig. 2 and 3, when the number of driving mechanisms 22 is two, each driving mechanism 22 is connected to one correction module 21, and the driving mechanism 22 is used to drive the corresponding correction module 21 to move toward the other correction module 21 or to move away from the other correction module 21.

When the shell 11 is fed to the press-fitting station, a larger gap is formed between the two correction modules 21, the shell 11 is placed in the clamping space between the two correction modules 21, and the driving mechanism 22 drives the two correction modules 21 to approach each other, so that the two correction modules 21 are respectively contacted with the two first side walls 111.

According to the press-fit correction device 200 of the embodiment of the utility model, by acting the two correction modules 21 on the two first side walls 111 with larger areas of the shell 11, when the end cover 12 is pressed into the shell 11, the first side walls 111 are corrected, and the first side walls 111 are restrained from deforming towards the direction away from the inside of the shell 11, so that the shell 11 is reliably connected with the end cover 12, and the yield of press-fit products is improved.

Referring to fig. 5 and 6, according to some embodiments of the utility model, each calibration module 21 includes a base 211 and a calibration block 212 disposed on the base 211, wherein the calibration block 212 protrudes from the base 211 along a first direction X, and the calibration block 212 is used for contacting with the first sidewall 111.

The base 211 serves as a positioning base of the calibration block 212, the base 211 may be located at a side of the calibration block 212 facing away from the first sidewall 111, and the volume of the base 211 may be greater than the volume of the calibration block 212.

The base 211 and the correction block 212 can be arranged in a split mode, and are convenient to process and manufacture. The connection manner between the calibration block 212 and the base 211 may be various, for example, the calibration block 212 may be connected to the base 211 by clamping, riveting, screwing, hot-melting, welding, etc.

The calibration block 212 protrudes from the base 211 along the first direction X, and the base 211 may have a first surface facing the first sidewall 111, where the calibration block 212 protrudes from the first surface. When the calibration block 212 is in contact with the first sidewall 111, the base 211 is not in contact with the first sidewall 111. For example, when the correction module 21 is disposed at a position of the housing 11 close to the opening, a portion of the base 211 may be disposed at a position distant from the housing 11, and the correction block 212 may be in contact with the position of the first side wall 111 close to the opening, since the base 211 is not in contact with the first side wall 111, it is possible to reduce interference of the base 211 with other components (such as press-fit components, the end cap 12, etc.) when the end cap 12 is assembled with the housing 11.

In the above-mentioned scheme, the base 211 is used for providing a positioning foundation for the calibration block 212, the calibration block 212 protrudes from the base 211, the base 211 may not contact with the housing 11, and the calibration block 212 may be disposed near the opening of the housing 11, so as to reduce interference between the base 211 and other components, and facilitate the end cap 12 to be pressed into the housing 11.

Referring to fig. 2 and 5, according to some embodiments of the utility model, an orthographic projection of the correction block 212 on the first sidewall 111 along the first direction X covers the first sidewall 111 along the second direction Y.

The orthographic projection of the correction block 212 on the first side wall 111 in the first direction X refers to the projection of the correction block 212 falling onto the first side wall 111 as viewed in the first direction X.

The orthographic projection of the correction block 212 on the first sidewall 111 covers the first sidewall 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 larger than the size of the first sidewall 111 in the second direction Y.

In the above-mentioned scheme, the correction block 212 has a larger size in the second direction Y, and can cover the first sidewall 111 in the second direction Y, so as to have a better restraining effect on the first sidewall 111 in the second direction Y.

Referring to fig. 2 and 5, according to some embodiments of the utility model, the calibration block 212 has a rectangular parallelepiped shape, and a length direction of the calibration block 212 is parallel to the second direction Y.

The correction block 212 is rectangular, the length direction of the correction block 212 is parallel to the second direction Y, and the width direction of the correction block 212 may be parallel to the third direction Z, so that the larger area of the correction block 212 is disposed toward the first sidewall 111, so that the correction block 212 has a larger contact area with the first sidewall 111.

In the above-mentioned scheme, the correction block 212 is rectangular, and the length direction of the correction block 212 is parallel to the second direction Y, so that, on one hand, the correction block 212 can have a larger contact area with the first side wall 111, and the correction block 212 has a better constraint effect on the first side wall 111, and on the other hand, is convenient for processing and manufacturing.

According to some embodiments of the utility model, calibration block 212 is removably coupled to base 211.

The connection mode between the calibration block 212 and the base 211 may be that the calibration block 212 is in threaded connection with the base 211, or that the calibration block 212 is in clamped connection with the base 211, for example, the calibration block 212 is provided with a protruding portion, the base 211 is provided with a recess portion corresponding to the protruding portion, and the protruding portion is embedded in the recess portion.

Alternatively, the correction block 212 is provided with a first mounting hole, the base 211 is provided with a second mounting hole, and the base 211 is in threaded connection with the correction block 212 through a screw penetrating through the second mounting hole and the first mounting hole.

In the above-described scheme, the calibration block 212 is detachably connected with the base 211 to facilitate replacement or adaptation to different specifications of the battery cells 100.

Referring to fig. 3, 4 and 6, according to some embodiments of the present utility model, the number of the correction blocks 212 is plural, and the plural correction blocks 212 are arranged at intervals along the second direction Y.

The plurality of correction blocks 212 are arranged at intervals along the second direction Y, and 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 as viewed along the first direction X. 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 sidewall 111 in the second direction Y.

The plurality of correction blocks 212 may be disposed at intervals along the second direction Y, and the plurality of correction blocks 212 may be disposed at equal intervals along the second direction Y, or the plurality of correction blocks 212 may be disposed at unequal intervals along the second direction Y.

The plurality of correction blocks 212 may or may not be equal in size along the second direction Y. In some embodiments, the plurality of correction blocks 212 are equal in size in the second direction Y, facilitating manufacturing.

In the above-mentioned scheme, 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 sidewall 111 in the second direction Y, so as to have a better restraining effect on the first sidewall 111.

Referring to fig. 3 and 6, according to some embodiments of the present utility model, the base 211 includes a plurality of protrusions 2111, and each calibration block 212 is disposed on one of the protrusions 2111.

The protrusions 2111 are a basis for arranging the correction blocks 212, and each correction block 212 is arranged corresponding to one protrusion 2111 such that a plurality of protrusions 2111 may be arranged at intervals along the second direction Y.

The plurality of protrusions 2111 are located at a side of the base 211 facing the first sidewall 111 to facilitate mounting of the calibration block 212 such that the calibration block 212 can be in contact with the first sidewall 111, and the base 211 is not in contact with the first sidewall 111.

The plurality of protrusions 2111 may be equally spaced along the second direction Y for ease of manufacturing.

In the above-described aspect, the base 211 includes the plurality of protrusions 2111, each protrusion 2111 corresponding to one correction block 212, so that the mounting and positioning of the plurality of correction blocks 212 are realized, and the weight of the base 211 can be reduced.

According to some embodiments of the present utility model, each correction block 212 is detachably connected with the corresponding protrusion 2111.

The connection manner of each correction block 212 and the corresponding protrusion 2111 may be various, for example, the correction block 212 is screwed with the base 211, or the correction block 212 is clamped with the base 211, for example, the correction block 212 is provided with the protrusion 2111, the base 211 is provided with a recess corresponding to the protrusion 2111, and the protrusion 2111 is embedded in the recess.

Alternatively, the calibration 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 penetrating the base 211 along the first direction X, and the protrusion 2111 is in threaded connection with the calibration block 212 through a threaded member (such as a bolt) penetrating the second mounting hole and the first mounting hole.

In the above-described scheme, each correction block 212 is detachably connected with the corresponding protrusion 2111 to facilitate replacement of the correction block 212.

Referring to fig. 6, according to some embodiments of the present utility model, the plurality of calibration blocks 212 includes two end calibration blocks 2121 and at least one middle calibration block 2122, the two end calibration blocks 2121 are respectively disposed at two ends of the base 211 along the second direction Y, and the at least one middle calibration block 2122 is disposed between the two end calibration blocks 2121 along the second direction Y.

The two end correction blocks 2121 are respectively disposed at two ends of the base 211 along the second direction Y, and the orthographic projection of the two end correction blocks 2121 on the first sidewall 111 overlaps with two end edges of the first sidewall 111 along the second direction Y when viewed along the first direction X, so that the two end correction blocks 2121 can correspond to two ends of the first sidewall 111 along the second direction Y. That is, one of the end correction blocks 2121 may be beyond an end edge of the first sidewall 111 corresponding to the second direction Y in the second direction Y, or the end correction block 2121 may be flush with an end edge of the first sidewall 111 corresponding to the second direction Y such that an end of the end correction block 2121 corresponding to the first sidewall 111 in the second direction Y has a larger contact area to enable a better restraining effect on an end of the first sidewall 111.

The number of middle correction blocks 2122 may be one, two, three, or more. Alternatively, as shown in fig. 6, the number of the middle correction blocks 2122 is three.

In some embodiments, the size of each correction block 212 in the second direction Y may be smaller than the size in the third direction Z. That is, each of the correction blocks 212 may have a rectangular parallelepiped shape, 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.

The surface of the correction block 212 contacting the first sidewall 111 may be a plane such that the correction block 212 may have a larger contact area with the first sidewall 111.

In the above-mentioned scheme, the two end correction blocks 2121 and the at least one middle correction block 2122 can respectively correspond to the end and the middle of the first sidewall 111 in the second direction Y, so as to have a better constraint effect on different portions of the first sidewall 111.

According to some embodiments of the utility model, the projections of the plurality of correction blocks 212 of two correction modules 21 overlap each other along the first direction X.

The projections of the plurality of correction blocks 212 of the two correction modules 21 overlap each other in the first direction X, which means that the plurality of correction blocks 212 of the two correction modules 21 may overlap entirely or partially.

For example, the two correction modules 21 have the same structure, and the two correction modules 21 are symmetrically arranged about a perpendicular bisector of the line connecting the two correction modules 21. For another example, the two correction modules 21 have different structures, and the plurality of correction blocks 212 on the two correction modules 21 are arranged in a staggered manner.

In the above-described aspect, the plurality of correction blocks 212 of the two correction modules 21 overlap each other as viewed in the first direction X, so that the manufacturing is facilitated, and the forces applied to the two correction modules 21 by the housing 11 are balanced.

In other embodiments, projections of the plurality of correction blocks 212 of two correction modules 21 are separated along the first direction X. That is, the plurality of correction blocks 212 of the two correction modules 21 do not overlap, as viewed in the first direction X.

According to some embodiments of the present utility model, the base 211 is made of metal; and/or the calibration block 212 is made of polyoxymethylene.

The base 211 is made of metal and has high strength. The material of the base 211 may be, but not limited to, stainless steel, aluminum alloy, etc.

Polyoxymethylene (POM), also known as acetal resin, polyoxymethylene, polyacetal, is a thermoplastic crystalline high molecular polymer, known as "super steel" or "steel" and acetal resin is a strong, hard thermoplastic with good fatigue and thermal stability, which has a low coefficient of friction and good heat resistance. Polyoxymethylene has the characteristics of high hardness, high toughness, smooth surface and the like, and reduces damage to the shell 11.

According to some embodiments of the present utility model, there is also provided a battery manufacturing apparatus including the press-fit correction device 200 as provided in any of the above embodiments.

The battery manufacturing apparatus further includes an end cap 12 press-fitting means for pressing the end cap 12 into the opening of the case 11 at a press-fitting station to close the opening.

The press-fitting correction device 200 is disposed at a press-fitting station, and after the housing 11 is fed to the press-fitting station, the two correction modules 21 are respectively contacted 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, and in the press-fitting process, the correction module 21 acts on the first side wall 111 to restrict the deformation of the first side wall 111 towards the inner part away from the housing 11, so that the end cover 12 is reliably connected with the housing 11, and the yield of press-fitting products is improved.

Referring to fig. 1 to 6, according to some embodiments of the present utility model, a press-fit correction device 200 is provided, and the press-fit correction device 200 is used for correcting a case 11 when an end cap 12 of a battery cell 100 is pressed into the case 11. The press-fitting correction device 200 comprises two correction modules 21 and a driving mechanism 22, wherein the two correction modules 21 are oppositely arranged along the first direction X, and the two correction modules 21 are used for acting on the two first side walls 111; the driving mechanism 22 is used for driving the two correction modules 21 to approach or separate from each other along the first direction X, so that each correction module 21 corrects the corresponding first sidewall 111. Each calibration module 21 includes a base 211 and a calibration block 212 disposed on the base 211, wherein the calibration block 212 protrudes from the base 211 along a first direction X, and the calibration block 212 is configured to contact the first sidewall 111. In the first direction X, an orthographic projection of the correction block 212 on the first side wall 111 covers the first side wall 111 in the second direction Y.

In some embodiments, each correction module 21 includes a correction block 212, where the correction block 212 has a rectangular parallelepiped shape, and the length direction of the correction block 212 is parallel to the second direction Y.

In some embodiments, each correction module 21 includes a plurality of correction blocks 212, the plurality of correction blocks 212 being spaced apart 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.

In the above embodiment, the correction block 212 is detachably connected with the base 211 to facilitate replacement of the correction block 212.

By adopting the press-fitting correction device 200, the two correction modules 21 are used for correcting the first side wall 111 with the larger area of the shell 11, when the end cover 12 is pressed into the shell 11, the correction modules 21 can restrain the first side wall 111 because the correction modules 21 act on the first side wall 111 so as to restrain the first side wall 111 from deforming towards the outside of the shell 11, so that the probability of deformation of the first side wall 111 is reduced, and the product assembled by the end cover 12 and the shell 11 has higher yield.

While the utility model has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the utility model. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present utility model is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims (12)

1. The utility model provides a pressure equipment correcting unit for when single battery's end cover is impressed the casing, correct to the casing, the casing includes two first lateral walls that set up relatively along first direction and two second lateral walls that set up relatively along the second direction, the second direction with first direction is perpendicular, the area of first lateral wall is greater than the area of second lateral wall, its characterized in that, pressure equipment correcting unit includes:

two correction modules arranged opposite to each other along the first direction, wherein the two correction modules are used for acting on the two first side walls;

the driving mechanism is used for driving the two correction modules to be close to or far away from each other along the first direction so that each correction module corrects the corresponding first side wall.

2. The press-fit correction device according to claim 1, wherein each of the correction modules includes a base and a correction block provided to the base, the correction block protruding from the base in the first direction, the correction block being for contact with the first side wall.

3. The press-fit correction device according to claim 2, wherein an orthographic projection of the correction block on the first side wall in the first direction covers the first side wall in the second direction.

4. The press-fit correction device according to claim 3, wherein the correction block has a rectangular parallelepiped shape, and a length direction of the correction block is parallel to the second direction.

5. The press-fit correction device of claim 4, wherein the correction block is detachably connected to the base.

6. The press-fit correction device according to claim 2, wherein the number of the correction blocks is plural, and the plural correction blocks are arranged at intervals along the second direction.

7. The press-fit correction device according to claim 6, wherein the base includes a plurality of projections, each of the correction blocks being provided to one of the projections.

8. The press-fit correction device according to claim 7, wherein each of the correction blocks is detachably connected with the corresponding projection.

9. The press-fit correction device according to claim 6, wherein the plurality of correction blocks includes two end correction blocks and at least one middle correction block, the two end correction blocks being disposed at both ends of the base in the second direction, respectively, and the at least one middle correction block being located between the two end correction blocks in the second direction.

10. The press-fit correction device according to claim 6, wherein projections of a plurality of the correction blocks of the two correction modules overlap each other in the first direction.

11. The press-fit correction device according to claim 2, wherein the base is made of metal; and/or

The material of the correction block is polyoxymethylene.

12. A battery manufacturing apparatus comprising the press-fit correction device according to any one of claims 1 to 11.