CN114833217B

CN114833217B - Flatness adjustment jig, apparatus, method of battery case, and battery manufacturing system

Info

Publication number: CN114833217B
Application number: CN202210764319.6A
Authority: CN
Inventors: 成朋; 汤云潞; 谢媛媛; 冯保铭; 耿杰; 张琦
Original assignee: Jiangsu Contemporary Amperex Technology Ltd
Current assignee: Jiangsu Contemporary Amperex Technology Ltd
Priority date: 2022-07-01
Filing date: 2022-07-01
Publication date: 2022-11-08
Anticipated expiration: 2042-07-01
Also published as: CN114833217A; WO2024002345A1

Abstract

The application discloses battery case's plane degree adjustment anchor clamps, equipment, method and battery manufacturing system, this plane degree adjustment anchor clamps include the module, the internal surface of module forms the plastic space and is equipped with protruding structure on the internal surface, the unsealed battery monomer that has battery case can get into or leave the plastic space, when unsealed battery monomer locates the plastic space, battery case's sunk position corresponds the setting with protruding structure, protruding structure is used for leaning on to the sunk position formation after the swell. During shaping, the concave position of the battery shell is bulged, the bulged concave position is abutted to the convex structure of the shaping space, the shape of the original concave position is matched with the convex structure, resilience of the battery shell is restrained, the flatness adjusting clamp of the battery shell is utilized, when unsealed battery monomers are subjected to batch shaping, the flatness consistency of the battery shell after shaping is good, and the surface gluing goodness of the battery shell and the wrapped insulating blue film are effectively improved.

Description

Flatness adjustment jig, apparatus, method of battery case, and battery manufacturing system

Technical Field

The application relates to the technical field of electric production, in particular to a flatness adjusting clamp, equipment and method for a battery shell and a battery manufacturing system.

Background

With the development of new energy, new energy is adopted as power in more and more fields. Because of the advantages of high energy density, cyclic charging, safety, environmental protection and the like, the battery is widely applied to the fields of new energy automobiles, consumer electronics, energy storage systems and the like.

In the production process of the battery, a single battery cell needs to be wrapped with the insulating blue film, and if the flatness of the battery cell is not within the specification range, the excellent rate of the wrapped insulating blue film is reduced.

Disclosure of Invention

In view of the above problems, the present application provides a flatness adjustment jig, apparatus, method for a battery case, and a battery manufacturing system, which can ensure uniformity of flatness of the battery case.

The utility model provides a first aspect provides a battery case's plane degree adjustment anchor clamps, including the module, the internal surface of module forms the plastic space and be equipped with protruding structure on the internal surface, has battery case's the battery monomer that does not seal can get into or leave the plastic space, the battery monomer that does not seal is located during the plastic space, battery case's sunk position with protruding structure corresponds the setting, protruding structure is used for after the swelling sunk position forms and supports and lean on.

According to the flatness adjusting clamp of the battery shell, when the unsealed battery monomer is shaped, the unsealed battery monomer is arranged in the shaping space, the protruding structure in the shaping space is arranged corresponding to the recessed position of the battery shell, the recessed position of the unsealed battery monomer is bulged, the bulged recessed position is abutted to the protruding structure in the shaping space, after a certain time, the battery monomer is deflated, the shape of the original recessed position is matched with the protruding structure, resilience of the battery shell is inhibited, the flatness adjusting clamp of the battery shell is utilized, when the unsealed battery monomer is shaped in batches, the flatness consistency of the battery shell after shaping is good, and the surface gluing goodness of the battery shell and the wrapped insulating blue film are effectively improved.

In some embodiments of the present application, the outer surface of the raised structure is a convex arc. The outer surface of the protruding structure is set to be the structure of the convex arc surface, so that the battery shell is guaranteed to be shaped in the process, the battery shell and the protruding structure have better fitting degree, the situation that the battery is rebounded after being shaped at the concave position is reduced, and the shaping effect of the battery shell is guaranteed.

In some embodiments of this application, the protruding height of the arc top of convex cambered surface is for predetermineeing the height, the value of predetermineeing the height is in battery case's the predetermined plane degree specification interval. When utilizing the flatness adjustment anchor clamps to carry out the plastic to battery case, battery case's sunken position is bloated and is leaned on with the protruding structure that the surface becomes the convex arc face, utilize the convex arc face to provide the benchmark for the bloating of sunken position, the arc top of convex arc face is the highest position of protruding structure, through setting up protruding structure to predetermine the height and will predetermine the height setting in predetermineeing the flatness specification interval, thereby guaranteed that battery case's sunken position can satisfy the requirement of predetermineeing the flatness specification after bloating, make the insulating blue membrane of package and further obtain improving at battery case's surperficial rubber coating goodness in the follow-up process.

In some embodiments of the present application, the predetermined height is h, where h e (0mm, 2mm). The value of the preset height is set in the interval of 0 mm-2 mm, so that the planeness of the shaped battery shell is within the requirement of the preset planeness specification, the production requirement in the subsequent process is further met, and the smooth production and yield are guaranteed.

In some embodiments of the present application, the module comprises:

a first mold;

the second mould is arranged opposite to the first mould, the shaping space is formed between the first mould and the second mould, and the first mould and/or the second mould are/is provided with the protruding structures. Through setting the module into two parts of first mould and second mould to be convenient for to the processing and the manufacturing of module, simultaneously, be convenient for in the module course of working to the overall arrangement and the processing of protruding structure.

In some embodiments of the present application, the protruding structures are disposed on both the first mold and the second mold, and the protruding structures on the first mold correspond to the protruding structures on the second mold. First mould and second mould set up relatively, through be provided with protruding structure on two moulds respectively to can realize carrying out synchronous plastic to the sunk position of two relative faces of battery case, and then guarantee the plastic effect to battery case.

In some embodiments of the present application, the flatness adjustment jig further includes a driving mechanism, at least one of the first mold and the second mold is in transmission connection with the driving mechanism, the driving mechanism is configured to drive the first mold and the second mold to approach or move away from each other, in the state of moving away from each other, the unsealed single battery cell can enter or leave the shaping space, in the state of moving closer to each other, the unsealed single battery cell is disposed in the shaping space, and the recessed position is disposed corresponding to the protruding structure. Utilize actuating mechanism drive first mould and second mould to be close to each other or keep away from, realized opening or closing of plastic space to in plastic space open mode, the unsealed battery monomer can conveniently get into or leave the plastic space, prevent the condition of battery case fish tail.

In some embodiments of the present application, the drive mechanism comprises:

the first driving part is in transmission connection with the first die so as to drive the first die to move towards the direction close to or away from the second die; and/or the presence of a gas in the gas,

and the second driving piece is in transmission connection with the second die so as to drive the second die to move towards the direction close to or far away from the first die. Through setting up first driving piece and second driving piece to realized driving respectively to first mould and second mould, the accessible realizes driving respectively to first mould and second mould through first driving piece and second driving piece respectively, and then has improved the flexibility of mould motion.

In some embodiments of the present application, the first drive member is a first telescoping cylinder;

and/or the second drive member is a second telescoping cylinder.

The first driving part and the second driving part are respectively arranged to be of the telescopic cylinder, so that the first die and the second die are guaranteed to move along a straight line, dislocation between the first die and the second die is prevented, the precision of a shaping space formed by the first die and the second die is guaranteed, and the shaping precision of the battery shell is guaranteed.

A second aspect of the present application provides a flatness adjustment apparatus of a battery case, including:

adjusting the jig according to the flatness of the battery case as described above;

and the helium returning device is used for filling helium into the unsealed battery monomer when the unsealed battery monomer is arranged in the shaping space of the flatness adjusting clamp, so that the concave position of the battery shell of the unsealed battery monomer is deformed outwards and is abutted against the convex structure in the shaping space. When the battery shell of the unsealed battery monomer is shaped, the unsealed battery monomer is arranged in a shaping space of a module of the flatness adjusting clamp, a convex structure of the shaping space corresponds to a concave position of the battery shell, a helium returning device is communicated with the unsealed battery monomer, helium is filled into the battery shell by the helium returning device, the concave position of the battery shell is filled with helium, the concave position abuts against the convex structure, the battery shell is shaped, the flatness adjusting clamp is used, the concave position of the battery shell can effectively contact with the convex structure in the shaping process, the shaping effect of the battery shell is ensured, and the uniformity of the flatness after shaping can be effectively ensured when a plurality of unsealed battery monomer battery shells are shaped.

In some embodiments of the present application, the helium returning device comprises:

a gas source for storing compressed helium gas;

the inflating nozzle is communicated with the air source;

and the driving component is in transmission connection with the inflating nozzle and is used for driving the inflating nozzle to be communicated with or separated from the unsealed battery monomer. Utilize drive assembly to drive the charging connector to change the position of charging connector, make the charging connector can be effectively with not sealing the battery monomer and be connected or break off, so that fill the helium operation through air supply and charging connector to not sealing the battery monomer, utilize the increase of helium pressure to fill the drum with battery case's sunken position, and the shaping to the battery case is realized to matching plane degree adjustment anchor clamps, and then guaranteed the plane degree of the battery case after the shaping.

In some embodiments of the present application, the flatness adjustment apparatus further includes:

the sensing device is used for sensing whether the shaping space is provided with the unsealed single battery or not;

and the control device is electrically connected with the sensing device, the helium returning device and the flatness adjusting clamp respectively. Whether the unsealed battery monomer is arranged in the shaping space of the sensing die or not is sensed by the sensing device, signals after sensing are fed back to the control device, the control device controls the flatness adjusting clamp and the helium returning device to shape the unsealed battery monomer battery shell according to the unsealed battery monomer in the shaping space, the automatic operation of shaping the battery shell is guaranteed, and the production efficiency is guaranteed.

A third aspect of the present application provides a battery manufacturing system including:

formation equipment;

according to the flatness adjusting device of the battery shell, the flatness adjusting device of the battery shell is arranged at the downstream of the formation device;

and the sealing equipment is arranged at the downstream of the flatness adjusting equipment of the battery shell and is used for sealing the battery shell. The shaping device is used for shaping the unsealed battery monomer after the formation process by utilizing the helium returning device and the flatness adjusting clamp in the flatness adjusting device, and after the flatness shaping device finishes shaping the battery shell of the unsealed battery monomer, the sealing device seals the unsealed battery monomer after shaping, so that the produced battery monomer meets the assembly requirement of the subsequent process, and the yield of the product is further ensured.

A fourth aspect of the present application proposes a flatness adjustment method of a battery case, which is implemented by the flatness adjustment apparatus of a battery case as described above, comprising:

receiving the unsealed single battery after the formation process;

controlling an unsealed battery monomer to enter a shaping space of a module of a flatness adjusting clamp, and keeping the unsealed battery in the shaping space;

and controlling a helium returning device to charge helium gas into the unsealed battery monomer according to preset parameters until the sunken position of the battery shell of the unsealed battery monomer is deformed and is abutted with the convex structure of the shaping space.

The battery monomer that does not seal after will changing into the process sets up in the plastic space of plane degree adjustment anchor clamps, recycles back helium device and fills the helium operation to the battery monomer that does not seal, utilizes the helium to exert pressure inside the battery case for the battery case is filled bloatedly, and the sunken position is filled to lean on behind the bloateing and is leaned on the protruding structure in plastic space, thereby realizes the plastic operation to battery case sunken position, and then has guaranteed the plane degree uniformity when carrying out the plastic operation to a plurality of battery cases.

In some embodiments of the present application, the controlling the unsealed battery cell into the shaping space of the flatness adjustment jig and holding the unsealed battery cell in the shaping space includes:

acquiring whether the unsealed battery monomer is arranged at a preset position of the reshaping space;

and controlling a first mold and a second mold of the module to approach each other according to the preset position, so as to clamp the unsealed single battery in the shaping space, and enabling the convex structure and the concave position to be correspondingly arranged. Utilize to have in the plastic space and not seal the battery monomer as the prerequisite, when having in the plastic space and not sealing the battery monomer, the operation module for first mould and second mould carry out the centre gripping to not sealing the battery monomer, guarantee that the protruding structure in sunken position on the battery case and the plastic space effectively corresponds the setting, thereby guaranteed not take place the displacement to the battery case plastic in-process, and then guaranteed the plastic effect to battery case.

In some embodiments of the present application, the preset parameters include a preset inflation pressure, wherein the preset inflation pressure is P, P e (10kpa, 100kpa);

and/or the preset parameter comprises a preset inflation time length, wherein the preset inflation time length is t, t epsilon (2s, 10s). The preset parameters are set, and the helium returning device is controlled to operate under the preset parameters, so that the shaping effect of the battery shell is guaranteed, meanwhile, the energy consumption of the helium returning device can be effectively reduced, and the production and manufacturing cost is further reduced.

The foregoing description is only an overview of the technical solutions of the present application, and the present application can be implemented according to the content of the description in order to make the technical means of the present application more clearly understood, and the following detailed description of the present application is given in order to make the above and other objects, features, and advantages of the present application more clearly understandable.

Drawings

Fig. 1 schematically shows a structural view of a vehicle according to an embodiment of the present application;

fig. 2 schematically illustrates an exploded structure view of a battery cell according to an embodiment of the present application;

FIG. 3 is a schematic structural diagram illustrating the flatness change of a battery case before and after cooling in the prior art;

fig. 4 schematically shows a structural view of a flatness adjustment apparatus of a battery case in an embodiment of the present application;

fig. 5 is a schematic structural view of a flatness adjustment jig in the flatness adjustment apparatus of the battery case shown in fig. 4;

fig. 6 is a schematic structural diagram illustrating a change in flatness of the battery case before and after shaping the battery case by using the flatness fixture according to the embodiment of the present application;

fig. 7 is a block diagram schematically showing the structure of a flatness adjustment apparatus of a battery case in an embodiment of the present application;

fig. 8 is a block diagram schematically showing the structure of a battery manufacturing system in the embodiment of the present application;

fig. 9 schematically shows a flowchart of a flatness adjustment method of a battery case according to an embodiment of the present application.

The reference numbers are as follows:

1000 is a vehicle;

100 is a battery, 200 is a controller, and 300 is a motor;

11 is a single battery;

111 is an end cap, and 111a is an electrode terminal;

112 is a battery shell;

1121 is the recessed position;

113 is an electric core assembly;

2000, a battery manufacturing system;

2100 is formation equipment, 2200 is flatness adjusting equipment, 2300 is sealing equipment and 2400 is conveying equipment;

2210 is a flatness adjustment fixture;

2211 is a module, 22111 is a first die, 22112 is a second die, 22113 is a shaping space, 22114 is a convex structure;

2212 is a driving mechanism, 22121 is a first driving member, 22122 is a second driving member;

2220 is helium recovering device, 2221 is driving component, 2222 is charging nozzle, 2223 is gas-guide tube, and 2224 is gas source;

2230 is a support frame, 2240 is a base, 2250 is a control device, and 2260 is a sensing device.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only used to illustrate the technical solutions of the present application more clearly, and therefore are only used as examples, and the protection scope of the present application is not limited thereby.

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 application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the technical terms "first", "second", and the like are used only for distinguishing different objects, and are not to be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary-secondary relationship of the technical features indicated. In the description of the embodiments of the present application, "a plurality" means two or more unless specifically defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase 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. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is only one kind of association relationship describing the association object, and means that three relationships may exist, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural pieces" refers to two or more (including two).

In the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the directions or positional relationships indicated in the drawings, and are only for convenience of description of the embodiments of the present application and for simplicity of description, but do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are used in a broad sense, and for example, may be fixedly connected, detachably connected, or integrated; mechanical connection or electrical connection is also possible; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. Specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

At present, the application of power batteries is more and more extensive from the development of market conditions. The power battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles and the like, and a plurality of fields such as military equipment and aerospace. With the continuous expansion of the application field of the power battery, the market demand is also continuously expanding.

The applicant notices that after the formation process of the existing battery monomer is finished, the internal temperature of the battery monomer is as high as 45-50 ℃, the external temperature is 25 ℃, and after the battery monomer is welded and sealed by a sealing nail under the condition, because of the existence of the internal and external temperature difference, when the internal temperature of the battery monomer is reduced to be equal to the external 25 ℃, the pressure difference is generated, so that the large surface and the side surface of the battery shell become more concave, and the flatness of the battery shell is beyond the specification. When the super specification of battery case's plane degree, it is follow-up to a single battery monomer package insulating blue membrane can lead to a package insulating blue membrane goodness to reduce, and simultaneously, the module section needs to be assembled single battery monomer, this process can be to battery monomer side and big face rubber coating (make and connect more firmly between the single battery monomer, improve the structural strength of whole battery package), because the rubber coating volume is fixed, can lead to the excessive condition of gluing defective rate increase or moulding area inadequately of module end, consequently, how to solve the battery monomer and make the big face of battery case and the super specification of plane degree of side become the technical problem that the skilled person in the art needs to solve urgently because of the pressure differential that inside and outside difference in temperature leads to.

In order to solve the problem that the flatness of the large surface and the side surface of a battery shell exceeds the specification due to the pressure difference caused by the temperature difference between the inside and the outside of the battery monomer, the applicant researches and discovers that after the formation process of the battery monomer is finished, the unsealed battery monomer is arranged in a flatness adjusting clamp with a convex structure, the convex structure is arranged corresponding to the concave position of the battery shell, and a helium returning device is used for filling helium into the battery shell so that the battery shell is filled with helium and abuts against the shaping space of the flatness adjusting clamp, meanwhile, the concave position abuts against the convex position, the condition that the flatness of the large surface and the side surface of the battery shell exceeds the specification due to the pressure difference caused by the temperature difference between the inside and the outside of the battery monomer is avoided, and meanwhile, the consistency requirement of the battery shell is met.

The battery cell disclosed in the embodiment of the application can be used in electric devices such as vehicles, ships or aircrafts, but not limited thereto. A power supply system including the electric device composed of the battery cell, the battery, and the like disclosed in the present application may be used.

The embodiment of the application provides an electric device using a battery as a power supply, wherein the electric device can be but is not limited to a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, an electric automobile, a ship, a spacecraft and the like. The electric toy may include a stationary or mobile electric toy, such as a game machine, an electric car toy, an electric ship toy, an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, etc.

It should be understood that the technical solutions described in the embodiments of the present application are not limited to be applied to the above described batteries and electric devices, but may be applied to all batteries including a box and electric devices using batteries.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the present disclosure. The vehicle 1000 may be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile may be a pure electric automobile, a hybrid electric automobile, or an extended range automobile, etc. The battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom or the head or the tail of the vehicle 1000. The battery 100 may be used for power supply of the vehicle 1000, for example, the battery 100 may serve as an operation power source of the vehicle 1000. The vehicle 1000 may further include a controller 200 and a motor 300, the controller 200 being configured to control the battery 100 to supply power to the motor 300, for example, for starting, navigation, and operational power requirements while the vehicle 1000 is traveling.

In some embodiments of the present application, the battery 100 may not only serve as an operating power source of the vehicle 1000, but also serve as a driving power source of the vehicle 1000, instead of or in part of fuel or natural gas to provide driving power for the vehicle 1000.

In order to meet different power requirements, the battery 100 may include a plurality of battery cells 11, and the battery cells 11 refer to the smallest unit constituting a battery module or a battery pack. A plurality of battery cells 11 may be connected in series and/or in parallel via the electrode terminals 111a to be applied to various applications. The battery referred to in this application includes a battery module or a battery pack. The plurality of battery cells 11 may be connected in series, in parallel, or in series-parallel, where series-parallel refers to a mixture of series connection and parallel connection. The battery 100 may also be referred to as a battery pack. In the embodiment of the application, the plurality of battery cells 11 may directly form the battery pack, or may form the battery module first, and then form the battery pack.

Fig. 2 is an exploded schematic view of a battery cell 11 according to some embodiments of the present disclosure. The battery cell 11 refers to the smallest unit constituting the battery 100. As shown in fig. 2, the battery cell 11 includes a battery case and a battery core assembly 113, wherein the battery case includes an end cap 111 and a battery housing 112.

The end cap 111 refers to a member that covers an opening of the battery case 112 to insulate the internal environment of the battery cell 11 from the external environment. Without limitation, the shape of the end cap 111 may be adapted to the shape of the battery case 112 to fit the battery case 112. Alternatively, the end cap 111 may be made of a material (e.g., an aluminum alloy) having a certain hardness and strength, so that the end cap 111 is not easily deformed when being impacted, and the battery cell 11 may have a higher structural strength and improved safety. The end cap 111 may be provided with functional components such as the electrode terminal 111 a. The electrode terminal 111a may be used to be electrically connected with the electric core assembly 113 for outputting or inputting electric power of the battery cell 11. In some embodiments, the end cap 111 may further be provided with a pressure relief mechanism for relieving the internal pressure when the internal pressure or temperature of the battery cell 11 reaches a threshold value. In some embodiments, an insulator may also be provided on the inside of the end cap 111, which may be used to isolate the electrical connection components within the cell housing 112 from the end cap 111 to reduce the risk of short circuits. Illustratively, the insulator may be plastic, rubber, or the like.

The battery case 112 is an assembly for mating with the end cap 111 to form an internal environment of the battery cell 11, wherein the formed internal environment may be used to house the battery cell assembly 113, electrolyte (not shown in the figures), and other components. The end cap 111 of the battery case 112 may be a separate component, and an opening may be provided in the battery case 112, and the opening is covered by the end cap 111 to form the internal environment of the battery cell 11. Without limitation, the end cap 111 and the battery case 112 may be integrated, and specifically, the end cap 111 and the battery case 112 may form a common connecting surface before other components are housed, and when it is necessary to enclose the inside of the battery case 112, the end cap 111 covers the battery case 112. The battery case 112 may have various shapes and various sizes, such as a rectangular parallelepiped shape, a cylindrical shape, a hexagonal prism shape, and the like. Specifically, the shape of the battery case 112 may be determined according to the specific shape and size of the battery cell assembly 113. The material of the battery case 112 may be various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present invention is not limited thereto.

In some embodiments of the present application, as shown in fig. 4 to 6, the flatness adjustment fixture 2210 of the battery housing 112 includes a module 2211, the inner surface of the shaping space 22113 forms a shaping space and is provided with a protruding structure 22114, the unsealed battery cell 11 with the battery housing 112 can enter or leave the shaping space 22113, when the unsealed battery cell 11 is provided in the shaping space 22113, the concave position 1121 of the battery housing 112 is disposed corresponding to the protruding structure 22114, and the protruding structure 22114 is used for abutting against the swelled concave position 1121.

Specifically, when the unsealed battery cell 11 is shaped, the unsealed battery cell 11 is arranged in the shaping space 22113, the convex structure 22114 in the shaping space 22113 is arranged corresponding to the concave position 1121 of the battery shell 112, then the convex position 1121 of the unsealed battery cell 11 is expanded, the expanded concave position 1121 is abutted to the convex structure 22114 of the shaping space 22113, after a certain time, the battery cell 11 is deflated, the original shape of the concave position 1121 is matched with the convex structure 22114, the springback of the battery shell 112 is inhibited, and when the unsealed battery cell 11 is subjected to batch shaping, the flatness consistency of the shaped battery shell 112 is better, so that the coating rate of the insulating blue film and the coating rate of the surface of the battery shell 112 are effectively improved by using the flatness adjusting clamp 2210.

It should be understood that the unsealed battery cell 11 is a structure after the formation process is finished, and when the unsealed battery cell 11 is subjected to the bulging, helium gas may be filled into the unsealed battery cell 11 through a helium returning process or other processes (such as filling an electrolyte solution, etc.), so that the internal pressure of the unsealed battery cell 11 is increased, the concave position 1121 of the battery case 112 is bulged, and the bulged structure 22114 of the reshaping space 2213 is utilized to form an abutment for the bulged concave position 1121, so that the reshaping operation on the concave position 1121 is achieved.

The shaping space 22113 is used for accommodating an unsealed battery cell 11, the shape of the shaping space 22113 is matched with that of the unsealed battery cell 11, the protruding structure 22114 is formed on the inner surface of the shaping space 22113, after the unsealed battery cell 11 is arranged in place in the shaping space 22113, the protruding structure 22114 is arranged corresponding to the recessed position 1121 of the battery shell 112 of the unsealed battery cell 11, a gap exists between the recessed position 1121 and the protruding structure 22114, after helium is filled into the battery shell 112 by the helium returning device 2220, the recessed position 1121 deforms outwards along with the increase of internal pressure, so that the recessed position 1121 is inflated until the gap between the recessed position 1121 and the protruding structure 22114 disappears, and the recessed position 1121 abuts against the protruding structure 22114, after a period of time, the recessed position 1121 deforms plastically, so as to ensure that the recessed position 1121 does not rebound after the pressure of the battery shell 112 is released, and the shaping effect of the recessed position 1121 is ensured.

In addition, the protruding structure 22114 is provided, and the protruding structure 22114 is used to provide a basis for abutting against the battery case 112 in the shaping process, so that the concave position 1121 can sufficiently abut against the protruding structure 22114, and on the basis of adjusting the flatness of the battery case 112 to meet the flatness specification, the deformation amount of the battery case 112 is reduced, and the situation that the concave position 1121 rebounds after shaping occurs is prevented (because the battery case 112 usually has a certain elastic deformation capability, if the deformation amount of the battery case 112 is large in the adjusting process, the situation that the battery case 112 rebounds after the pressure of the helium returning device 2220 is released easily occurs, so that the adjusting effect of the concave position 1121 is uncontrollable, and the flatness specification cannot be achieved).

It should be understood that the concave position 1121 of the battery case 112 does not conform to the flatness specification of the battery case 112, the concave position 1121 bulges and abuts against the convex structure 22114 in the shaping process, after shaping, the shape of the concave position 1121 matches with the convex structure 22114, meanwhile, the concavity of the concave position 1121 matches with the convexity of the convex position, the convexity of the convex structure 22114 is set within the flatness specification, and although the concave position 1121 still has a certain concavity after shaping, the shaped concavity meets the flatness requirement of the battery case 112, and further meets the requirement of the subsequent processing procedure.

The uniformity of the flatness of the battery cases 112 means that when the battery cases 112 are processed in a batch, the recessed positions 1121 of each battery case 112 are processed to be within the flatness specification of the battery case (the flatness specification is set according to the average recessed value of the battery cases 112 of the processed batch).

It is to be noted that the shape of the protruding structure 22114 is set as required, and may be a regular shape (for example, a circle, a bar, or a square), or an irregular shape (for example, a sawtooth shape, a lightning shape, or a combination of shapes), and the specific shape of the protruding structure 22114 is set according to the shape of the concave position 1121 of the battery case 112 to be shaped.

In addition, the shaping space 22113 has a plurality of faces, the protruding structures 22114 may be disposed on one face of the shaping space 22113, or on a plurality of faces, specifically set according to the recessed positions 1121 on the battery case 112 of the unsealed battery cell 11 to be shaped, and meanwhile, the number of the protruding structures 22114 on one face may be one or more, and specifically set according to the number of the recessed positions 1121 on one face of the battery case 112 to be shaped.

In some embodiments of the present application, as shown in fig. 4-6, the outer surface of the raised structure 22114 is a convex arc.

Specifically, after the formation process, due to the internal and external temperature difference, the outer surface of the battery case 112 is usually concave, and the concave surface is usually a concave arc surface, the position of the shaping space 22113 corresponding to the concave position 1121 is provided with the protruding structure 22114, and the outer surface of the protruding structure 22114 is set to be a structure of a convex arc surface, so that it is ensured that the battery case 112 has better attaching degree with the protruding structure 22114 in the shaping process, and further the situation that the battery concave position 1121 rebounds after shaping is reduced, so that the shaping effect of the battery case 112 is ensured.

It should be understood that, under the inflation action of the helium recovery device 2220, the concave position 1121 of the battery case 112 deforms outwards and is inflated, the outer surface of the convex structure 22114 is set to be a convex arc surface, so that in the process of inflating the concave position 1121, the concave position 1121 can fully abut against the convex structure 22114, the concave position 1121 is limited by the shape of the convex structure 22114 in the process of inflating the concave position 1121, the shaped shape is arranged according to the shape of the convex structure 22114, the flatness of the shaped battery case 112 is within a required specification range, and the processing requirements of subsequent processes are further met.

In addition, the convex structures 22114 are arranged to be convex arc surfaces, so that the body of the battery shell 112 located at the concave position 1121 can be sufficiently abutted against the convex structures 22114 in the process of bulge shaping of the concave position 1121 of the battery shell 112, the situation of fracture caused by stress concentration is prevented, and the shaping effect of the battery shell 112 is further ensured.

In some embodiments of the present application, the protrusion height of the arc top of the convex arc surface is a preset height, and a value of the preset height is within a preset flatness specification interval of the battery case 112.

Specifically, the outer surface of the protrusion 22114 is configured as a convex arc surface, and when the protrusion 22114 is cut along the height direction thereof, the cross section of the protrusion is a parabolic shape having a highest position, wherein the highest position is an arc top of the convex arc surface, and the distance between the highest position and the surface of the shaping space 22113 having the protrusion 22114 is the protrusion height of the arc top, the protrusion height of the arc top is set to a preset height, and the value of the preset height is set within a preset flatness specification interval.

When the flatness adjustment jig 2210 is used for shaping the battery case 112, the concave position 1121 of the battery case 112 is bulged and abuts against the convex structure 22114 with a convex arc surface on the outer surface, the convex arc surface is used for providing a reference for bulging of the concave position 1121, the arc top of the convex arc surface is the highest position of the convex structure 22114, and the convex structure 22114 is set to be at the preset height and the preset height is set within the preset flatness specification interval, so that the requirement of the preset flatness specification can be met after the concave position 1121 of the battery case 112 is bulged, and the advantages of coating the insulating blue film in the subsequent process and coating the surface of the battery case 112 are further improved.

It should be noted that, in the embodiment of the present application, the predetermined flatness specification area may be set according to different battery cases 112, that is, the height of the arc top of the protruding structure 22114 is set, so as to meet the shaping requirements of different battery cases 112. For example, when a batch of battery cases 112 with the same model are shaped, the preset height of the arc shape of the protruding structures 22114 is set according to the average recessed value of the recessed positions 1121 of the batch of battery cases 112, so as to shape the batch of battery cases 112 by using the set protruding structures 22114, so that the recessed positions 1121 of the batch of battery cases 112 after being shaped are all matched with the protruding heights of the protruding structures 22114, that is, the batch of battery cases 112 all have the same recessed structure, thereby ensuring the consistency of the flatness of the batch of battery cases 112.

In some embodiments of the present application, as shown in FIG. 5, the predetermined height is h, where h e (0mm, 2mm).

Specifically, in this application, the outer surface is that protruding structure 22114 of convex arc face forms from the inner surface hunch-up of plastic space 22113, and the distance that its arc top apart from the face that plastic space 22113 has protruding structure 22114 is preset height h, through setting the value of h between 0mm < h < 2mm, thereby on the basis of guaranteeing to the plastic of battery case 112, make the plane degree of battery case 112 accord with required plane degree specification, and then satisfy the user demand of follow-up production, thereby guaranteed going on smoothly of production and the yield of output.

It should be understood that, by setting the value range of the preset height h between 0mm < h < 2mm, the amount of the concave deformation of the surface of the shaped battery shell 112 is small, the internal space is prevented from being affected due to the concave of the battery shell 112, and the space enough to satisfy the installation of the battery core assembly 13 is ensured in the battery shell 112.

It should be noted that, in the embodiment of the present application, the predetermined height may be adjusted according to actual production, wherein h may be 0.1 mm, 0.2 mm, 0.3mm, 0.4 mm, 0.5mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, 1.1 mm, 1.2 mm, 1.3mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm 8230, 8230A.

In some embodiments of the present application, as shown in fig. 4-6, the module 2211 comprises:

the first mold 22111;

a second mold 22112, the second mold 22112 is disposed opposite to the first mold 22111, the shaping space 22113 is formed between the first mold 22111 and the second mold 22112, and the first mold 22111 and/or the second mold 22112 is provided with the projection 22114.

Specifically, the first and second dies 22111 and 22112 form a die set 2211, and a shaping space 22113 is formed between the first and second dies 22111 and 22112, while at least one of the first and second dies 22111 and 22112 is provided with a raised structure 22114. By providing the module 2211 as two parts, the first and second dies 22111 and 22112, the processing and fabrication of the module 2211 is facilitated, and at the same time, the layout and processing of the raised structures 22114 during the processing of the module 2211 is facilitated.

It should be noted that the module 2211 is configured as two parts, i.e., a first mold 22111 and a second mold 22112, a shaping space 22113 is formed between the two molds, and the shaping space 22113 formed by the two molds may have an open structure or a closed structure.

In addition, which mold the protrusion 22114 is disposed on, and how the protrusion 22114 is disposed on the mold, can be set and adjusted according to the specific need of the battery case 112.

In some embodiments of the present application, as shown in fig. 4-6, the protrusion structures 22114 are disposed on both the first and

second molds

22111 and 22112, and the protrusion structures 22114 on the first mold 22111 are disposed corresponding to the protrusion structures 22114 on the second mold 22112.

Specifically, the housing of the battery housing 112 usually has recessed positions 1121 on two opposite side surfaces (for example, the battery housing 112 has a rectangular structure, and two opposite large surfaces and/or two opposite side surfaces of the battery housing 112 usually have recessed positions at the same time), when the battery housing 112 is shaped, the unsealed single battery 11 is disposed in the shaping space 22113 formed between the first mold 22111 and the second mold 22112, and the protruding structures 22114 on the two molds are respectively disposed corresponding to the recessed positions 1121 on the battery housing 112, when the battery housing 112 is subjected to a nitrogen charging operation by the helium returning device 2220, the recessed positions 1121 are inflated and respectively abutted against the two protruding structures 22114, so that the recessed positions 1121 on two opposite surfaces of the battery housing 112 can be synchronously shaped, and the shaping effect on the battery housing 112 is ensured.

It should be understood that the number of the protruding structures 22114 on the first mold 22111 may be one, two, three, 8230 \8230;, and when the number of the protruding structures 22114 on the first mold 22111 is two or more, the structures may be completely the same, partially the same or completely different, and meanwhile, when the number of the protruding structures 22114 on the first mold 22111 is two or more, the arrangement of the protruding structures 22114 is specifically set according to the recessed positions 1121 on the battery housing 112.

In addition, the number of the projection structures 22114 on the second mold 22112 can be one, two, three, 8230, and when the number of the projection structures 22114 on the second mold 22112 is two or more, the structures can be completely the same, partially the same or completely different, and when the number of the projection structures 22114 on the second mold 22112 is two or more, the arrangement of the projection structures 22114 is specifically set according to the recessed positions 1121 on the battery housing 112.

In the embodiment of the present application, the shaping space 22113 is formed between the first mold 22111 and the second mold 22112, and both the first mold 22111 and the second mold 22112 may be fixed (the shaping space 22113 is a fixed space), one of them may be fixed (the shaping space 22113 is a variable space), the other may be movable, or both of them may be movable (the shaping space 22113 is a variable space).

In some embodiments of the present application, as shown in fig. 4 and 5, the flatness adjustment jig 2210 further includes a driving mechanism 2212, at least one of the first mold 22111 and the second mold 22112 is in transmission connection with the driving mechanism 2212, the driving mechanism 2212 is used for driving the first mold 22111 and the second mold 22112 to approach or separate from each other, in the separated state, the unsealed battery cell 11 can enter or leave the shaping space 22113, in the approaching state, the unsealed battery cell 11 is disposed in the shaping space 22113, and the concave position 1121 is disposed corresponding to the convex structure 22114.

Specifically, a driving mechanism 2212 is provided, and the driving mechanism 2212 is in transmission connection with at least one of the two molds, and the first mold 22111 and the second mold 22112 are driven to approach or separate from each other by the operation of the driving mechanism 2212, and when the two molds are separated from each other, the shaping space 22113 is in an open state, and when the two molds are adjacent to each other, the shaping space 22113 is in a closed state. When the shaping space 22113 is opened, the unsealed battery cell 11 can enter or leave the shaping space 22113, and when the shaping space 22113 is closed, the battery cell 11 located in the shaping space 22113 is held by the first and

second molds

22111 and 22112 and is held in the shaping space 22113.

Through setting up actuating mechanism 2212 to guaranteed that not seal the convenient shaping space 22113 that gets into of battery monomer 11 or leaves module 2211, and then avoided because of the narrow and small condition that leads to not seal battery monomer 11's battery case fish tail of passageway, feasible battery monomer 11's quality obtains guaranteeing effectively.

It should be understood that, as shown in fig. 4 to 6, the shaping space 22113 formed by the first mold 22111 and the second mold 22112 is an open space (only one side of the first mold 22111 and one side of the second mold 22112 are closed), the driving mechanism 2212 drives the first mold 22111 to move away from the second mold 22112, so that the size of the passage into the shaping space 22113 is increased, and when the unsealed battery cells 11 enter the shaping space 22113 through the passage, it is convenient and fast, and the friction between the mold and the battery case due to the narrow space does not occur, so as to eliminate the risk of scratching the battery case.

It should be noted that, under the driving of the driving mechanism 2212, the first mold 22111 and the second mold 22112 move close to or away from each other, i.e. under the driving of the driving mechanism 2212, the first mold 22111 and the second mold 22112 move linearly, so as to open or close the whole shaped space 22113.

In addition, the driving structure may be separately in transmission connection with the first mold 22111, separately in transmission connection with the second mold 22112, and separately in transmission connection with the first mold 22111 and the second mold 22112, so as to satisfy the operation of the first mold 22111 relative to the second mold 22112, thereby ensuring that the unsealed battery cell 11 enters or leaves the shaping space 22113.

In addition, when the driving mechanism 2212 drives the first mold 22111 and the second mold 22112 to move towards each other to close the shaping space 22113, the unsealed battery cell 11 in the shaping space 22113 is clamped in the shaping space 22113, the concave position 1121 of the battery shell 112 is arranged corresponding to the convex structure 22114 (a gap is formed between the concave position and the convex structure 22114), and the plane position (the position where the concavity is not formed) of the battery shell 112 is abutted against the surface of the shaping space 22113 formed by the molds, so that the unsealed battery cell 11 is kept in the shaping space 22113, the battery shell 112 is prevented from being displaced in the shaping process, and the shaping effect on the battery shell 112 is further ensured.

In some embodiments of the present application, as shown in fig. 4 and 5, the drive mechanism 2212 comprises: a first driving member 22121, the first driving member 22121 is in driving connection with the first mold 22111 to drive the first mold 22111 to move closer to or away from the second mold 22112, and/or a second driving member 22122, the second driving member 22122 is in driving connection with the second mold 22112 to drive the second mold 22112 to move closer to or away from the first mold 22111.

Specifically, the first mold 22111 is in transmission connection with the first driving member 22121, the second mold 22112 is in transmission connection with the second driving member 22122, whether the first mold 22111 moves or not is driven by the first driving member 22121, and whether the second mold 22112 moves or not is driven by the second driving member 22122, and the first mold 22111 and the second mold 22112 can be moved close to or away from each other by the operation of at least one driving member.

By arranging the first driving member 22121 and the second driving member 22122, the first die 22111 and the second die 22112 can be driven respectively by the first driving member 22121 and the second driving member 22122, and the flexibility of die movement is improved.

It should be noted that the types of the first driving member 22121 and the second driving member 22122 may be the same or different, and in the present embodiment, the types of the first driving member 22121 and the second driving member 22122 are the same, wherein the types of the driving members may be the driving member 2221 (electric motor, internal combustion engine, steam engine, etc.) + the speed change assembly (gear set, pulley set, etc.), and may also be a telescopic cylinder (air cylinder, oil cylinder, electric cylinder, etc.).

In some embodiments of the present application, the first drive 22121 is a first telescoping cylinder;

and/or the second drive 22122 is a second telescoping cylinder.

Specifically, when the types of the first driving member 22121 and the second driving member 22122 are completely the same (in other embodiments of the present application, the types of the first driving member 22121 and the second driving member 22122 may be different), the first driving member 22121 and the second driving member 22122 are respectively configured as telescopic cylinders, so that the first die 22111 and the second die 22112 are ensured to move along a straight line, a misalignment between the first die 22111 and the second die 22112 is prevented, and the precision of the shaping space 22113 formed by the first die 22111 and the second die 22112 is ensured, so that the shaping precision of the battery housing 112 is ensured.

It should be noted that the flatness adjustment jig 2210 further has a base 2240, the first mold 22111 and the second mold 22112 are slidably disposed on the base 2240, the cylinder of the first telescopic cylinder is fixed on the base 2240, the rod of the first telescopic cylinder is connected to the first mold 22111, the cylinder of the second telescopic cylinder is fixed on the base 2240, the rod of the second telescopic cylinder is connected to the second mold 22112, and the extending directions of the first telescopic cylinder and the second telescopic cylinder are the same, so as to drive the two molds to approach or move away from each other on the base 2240 by using the extension and retraction of the two telescopic cylinders.

A sliding groove is formed in the base 2240, the sliding groove extends along the moving direction of the first mold 22111, the first slider structure of the first mold 22111 is slidably mounted in the sliding groove, the second slider structure of the second mold 22112 is slidably mounted in the sliding groove, the first telescopic cylinder is connected with the first mold 22111 and drives the first mold 22111 to slide along the extending direction of the sliding groove, the second telescopic cylinder is connected with the second mold 22112 and drives the second mold 22112 to slide along the extending direction of the sliding groove, the two modules 2211 are guided by using the base 2240 with the sliding groove, and the precision of the shaping space 22113 formed by the first mold 22111 and the second mold 22112 is further ensured.

A second aspect of the present application proposes a flatness adjustment apparatus 2200 of a battery case 112, as shown in fig. 4 to 6, including:

adjusting the jig 2210 according to the flatness of the battery case 112 as described above;

when the unsealed battery cell 11 is disposed in the shaping space 22113 of the flatness adjustment jig 2210, the helium recovery device 2220 is used for filling helium gas into the unsealed battery cell 11, so that the concave position 1121 of the battery case 112 of the unsealed battery cell 11 is deformed outwards and is abutted to the convex structure 22114 in the shaping space 22113.

Specifically, when shaping the battery case 112 of the unsealed battery cell 11, the unsealed battery cell 11 is placed in the shaping space 22113 of the module 2211 of the flatness adjustment jig 2210, so that the convex structures 22114 of the shaping space 22113 correspond to the concave positions 1121 of the battery case 112, the helium recovery device 2220 is communicated with the unsealed battery cell 11, helium is filled into the battery case 112 by the helium recovery device 2220, the concave positions 1121 of the battery case 112 are inflated by the helium, so that the concave positions 1121 abut against the convex structures 22114 to shape the battery case 112, the concave positions 1121 of the battery case 112 can effectively contact with the convex structures 22114 during shaping by the flatness adjustment jig, thereby ensuring the shaping effect on the battery case 112, and when shaping the battery cases 112 of a plurality of unsealed battery cells 11, the uniformity of flatness after shaping can be effectively ensured.

It should be understood that the helium returning device 2220 shapes the battery case 112 by filling helium gas into the interior of the battery case 112 in a manner of filling the battery case 112 with helium gas, and the concave positions 1121 can be uniformly shaped in the process of filling the battery case, so that a good shaping effect can be ensured.

In addition, when the unsealed battery cell 11 enters the shaping space 22113 and is clamped in the shaping space 22113, the helium returning device 2220 is communicated with the inside of the unsealed battery cell 11, the helium returning device 2220 fills helium into the unsealed battery cell 11, the internal pressure of the battery shell 112 is continuously increased along with the increase of the helium, the air pressure is increased to deform the battery shell 112 from inside to outside, the concave position 1121 is bulged through deformation, the convex structure 22114 of the shaping space 22113 is used for abutting against the concave position 1121, the situation of springback after shaping is prevented, and the shaping effect of the battery shell 112 is further ensured.

In some embodiments of the present application, as shown in fig. 4, the helium recovery device 2220 includes:

a gas source 2224, said gas source 2224 being for storing compressed helium gas;

a charging nozzle 2222, said charging nozzle 2222 being in communication with said gas source 2224;

the driving part 2221 is in transmission connection with the inflating nozzle 2222, and is used for driving the inflating nozzle 2222 to be communicated with or separated from the unsealed single battery 11.

Specifically, the inflating nozzle 2222 is in communication with the air source 2224, the inflating nozzle 2222 is in transmission connection with the driving part 2221, and the driving part 2221 drives the inflating nozzle 2222 to change the position, so as to realize the communication or disconnection between the inflating nozzle 2222 and the unsealed battery cell 11. The driving part 2221 is used to drive the inflating nozzle 2222 so as to change the position of the inflating nozzle 2222, so that the inflating nozzle 2222 can be effectively connected with or disconnected from the unsealed battery cell 11, so that the unsealed battery cell 11 can be inflated by the gas source 2224 and the inflating nozzle 2222, the depressed position 1121 of the battery shell 112 is inflated by the increase of the pressure of helium gas, the shaping of the battery shell is realized by matching with the flatness adjusting clamp 2210, and the flatness of the shaped battery shell 112 is further ensured.

It should be understood that, when the unsealed battery cell 11 enters or leaves the shaping space 22113 of the flatness adjusting fixture, the driving part 2221 drives the inflating nozzle 2222 to separate from the unsealed battery cell 11, so as to ensure the situation of interference when the unsealed battery cell 11 enters or leaves the shaping space 22113, and when the unsealed battery cell 11 is arranged in the shaping space 22113 and needs to be shaped, the driving part 2221 can effectively ensure the communication between the inflating nozzle 2222 and the unsealed battery cell 11.

In addition, the gas source 2224 is a high-pressure gas source 2224, which stores high-pressure helium gas, when the battery case 112 needs to be reshaped, the high-pressure helium gas in the gas source 2224 enters the inside of the battery case 112 through the charging nozzle 2222 to realize the bulging of the battery case 112, and after the reshaping of the battery case 112 is completed, the gas source 2224 stops filling helium gas into the battery case 112.

It should be noted that the charging connector 2222 is communicated with the air source 2224 through the air duct 2223, and a control valve is arranged on one of the air duct 2223, the charging connector 2222 and the air source 2224, and the control valve is used to control whether the charging connector 2222 outputs helium to the outside, so that effective supply of helium is ensured, and waste caused by helium leakage is prevented.

In addition, the flatness adjusting apparatus 2200 further includes a support 2230, the support 2230 is mounted on a base 2240 of the flatness adjusting fixture 2210, the driving part 2221 is mounted on the support 2230, in this application, the driving part 2221 is a telescopic cylinder (in other embodiments, the driving part 2221 is a motor + rack and pinion structure), and the inflating nozzle 2222 is mounted on a cylinder rod of the telescopic cylinder, so as to connect or disconnect the inflating nozzle 2222 with the unsealed battery cell 11 by using the telescopic action of the telescopic cylinder. The telescopic link has a simple structure and good directivity, and can effectively ensure the connection precision of the inflating nozzle 2222 and the unsealed battery monomer 11.

In some embodiments of the present application, as shown in fig. 7, the flatness adjustment apparatus 2200 further includes:

a sensing means 2260 for sensing whether the unsealed battery cell 11 is in the shaping space 22113;

a control device 2250, wherein the control device 2250 is electrically connected to the sensing device 2260, the helium recovery device 2220 and the flatness adjustment jig 2210, respectively. Whether the unsealed battery cell 11 is arranged in the shaping space 22113 of the mold is sensed by the sensing device 2260, the sensed signal is fed back to the control device 2250, and the control device 2250 controls the flatness adjusting clamp 2210 and the helium returning device 2220 to shape the battery shell 112 of the unsealed battery cell 11 according to the unsealed battery cell 11 in the shaping space 22113, so that the automatic operation of shaping the battery shell 112 is ensured, and the production efficiency is ensured.

It should be noted that the control device 2250 includes a human-computer interaction module, a processing module, and a storage module, etc., where the human-computer interaction module is used for an operator to input a corresponding instruction for setting and setting flatness adjustment (through a key, a touch screen, or a mobile terminal, etc.), and the flatness adjustment device 2200 displays the current working state information (having a display function), the processing module is used for processing and computing data, etc., and the storage module is used for storing data, etc.

The sensing means 2260 may be disposed inside the shaping space 22113, or may be disposed outside the shaping space 22113, and the sensing means 2260 may be a photoelectric sensor, an infrared sensor, or the like.

A third aspect of the present application proposes a battery manufacturing system 2000, as shown in fig. 4 to 8, including:

a formation device 2100;

according to the flatness adjustment apparatus 2200 of the battery case 112 as described above, the flatness adjustment apparatus 2200 of the battery case 112 is provided downstream of the formation apparatus 2100;

a sealing apparatus 2300, the sealing apparatus 2300 being provided downstream of the flatness adjustment apparatus 2200 of the battery case 112 for sealing the battery case 112.

Specifically, the helium returning device 2220 and the flatness adjusting jig 2210 in the flatness adjusting apparatus 2200 are used for shaping the unsealed single battery 11 after the formation process, and after the flatness shaping apparatus finishes shaping the battery shell 112 of the unsealed single battery 11, the sealing apparatus 2300 performs the sealing operation on the shaped unsealed single battery 11, so that the produced single battery 11 meets the assembly requirements of the subsequent processes, and the yield of the product is further ensured.

It should be noted that the battery manufacturing system 2000 further includes a conveying device 2400 (a conveyor belt, etc.), and the conveying device 2400 is used to realize the position transfer of the battery cell 11, for example, the battery cell 11 is transferred into the formation device 2100, the battery cell 11 is transferred from the formation device 2100 to the cooling position, the battery cell 11 is transferred from the cooling position to the sealing device 2300, and the battery cell 11 is transferred from the sealing device 2300 to the next station, etc.

As shown in fig. 4 to 9, a fourth aspect of the present application proposes a flatness adjustment method of a battery case 112, which is implemented by the flatness adjustment apparatus 2200 of the battery case 112 as described above, including:

s1: receiving the unsealed single battery 11 after the formation process;

s2: controlling the unsealed battery cell 11 to enter the shaping space 22113 of the module 2211 of the flatness adjustment jig 2210 and holding the unsealed battery in the shaping space 22113;

s3: controlling a helium returning device 2220 to fill helium gas into the unsealed battery cell 11 by preset parameters until the concave position 1121 of the battery shell 112 of the unsealed battery cell 11 is deformed and abuts against the convex structure 22114 of the shaping space 22113.

Specifically, the unsealed battery cell 11 after the forming process is disposed in the shaping space 22113 of the flatness adjusting fixture 2210, and then the helium returning device 2220 is used to charge helium to the unsealed battery cell 11, and helium is used to pressurize the inside of the battery shell 112, so that the battery shell 112 is charged with helium, and the concave position 1121 is charged with helium and abuts against the convex structure 22114 of the shaping space 22113, thereby realizing the shaping operation of the concave position 1121 of the battery shell 112, and further ensuring the flatness consistency when the shaping operation is performed on a plurality of battery shells 112.

It should be understood that preset parameters are set for the helium recovery device 2220, so that adverse effects on other components arranged inside the battery housing 112 due to helium gas are effectively avoided while the shaping effect on the battery housing 112 is ensured.

In some embodiments of the present application, the step of controlling the unsealed battery cell 11 to enter the shaping space 22113 of the flatness adjustment jig 2210 and holding the unsealed battery cell 11 in the shaping space 22113 includes:

acquiring whether the preset position of the shaping space 22113 has the unsealed battery cell 11;

having the unsealed battery cell 11 according to the preset position, the first and second dies 22111 and 22112 of the module 2211 are controlled to approach each other to clamp the unsealed battery cell 11 in the shaping space 22113 so that the raised structure 22114 is disposed corresponding to the recessed position 1121.

Specifically, on the premise that the shaping space 22113 is provided with the unsealed battery cell 11, when the shaping space 22113 is provided with the unsealed battery cell 11, the module 2211 is operated, so that the first mold 22111 and the second mold 22112 clamp the unsealed battery cell 11, the concave position 1121 on the battery shell 112 is ensured to be effectively arranged corresponding to the convex structure 22114 in the shaping space 22113, and therefore, the situation that no displacement occurs in the shaping process of the battery shell 112 is ensured, and the shaping effect on the battery shell 112 is ensured.

In some embodiments of the subject application, the predetermined parameter comprises a predetermined inflation pressure, wherein the predetermined inflation pressure is P, P ∈ (10kpa, 100kpa);

and/or the preset parameter comprises an inflation time period, wherein the inflation time period is t, t epsilon (2s, 10s).

Specifically, the preset parameters are set, and the helium recovery device 2220 is controlled to operate under the preset parameters, so that while the shaping effect on the battery shell 112 is ensured, the energy consumption of the helium recovery device 2220 can be effectively reduced, and further, the production and manufacturing costs are reduced.

It should be noted that, when the preset inflation pressure is set inversely proportional to the preset inflation time, that is, when the preset inflation time is long, the preset inflation pressure is small, and when the preset inflation time is short, the inflation pressure is large, so as to ensure the shaping of the battery case 112 and prevent adverse effects on other components inside the battery case 112 (for example, damage to the internal structure due to excessive pressure, etc.).

In the prior art, the temperature of the battery cell 11 after the formation process is 45-50 ℃, the time required for the battery cell 11 to reach the seal nail welding station is generally 15min, the temperature of the battery cell 11 after 15min is still 40-45 ℃, as shown in fig. 3, after the seal nail welding and sealing of the battery cell 11, the temperature difference exists between the inside and the outside of the battery cell 11, and when the temperature inside the battery cell 11 is reduced to the outside temperature, a huge pressure difference is generated, so that the flatness of the large surface and the side surface of the battery shell 112 becomes concave and exceeds the flatness specification.

After the battery cell 11 is formed, the unsealed battery cell 11 is arranged in the flatness adjusting clamp 2210 with the convex structure 22114, the convex structure 22114 is arranged corresponding to the concave position 1121 of the battery shell 112, and the helium returning device 2220 is utilized to charge helium into the battery shell 112, so that the battery shell 112 is charged and abutted against the shaping space 22113 of the flatness adjusting clamp 2210, and meanwhile, the concave position 1121 is abutted against the convex position, thereby avoiding the flatness of the large surface and the side surface of the battery shell 112 from exceeding the specification due to the pressure difference caused by the temperature difference between the inside and the outside of the battery cell 11, and simultaneously meeting the requirement of the consistency of the battery shell 112.

In some embodiments of the present application, the cells 11, after formation, have a concavity average of-0.5 mm as measured. The flatness adjusting jig 2210 is customized according to the data, and the convexity of the most convex point of the convex structure 22114 (the convex surface of the convex structure 22114 is a convex arc surface, and the convex height of the arc top of the convex arc surface) of the shaping space 22113 of the flatness adjusting jig 2210 is 0.5mm, so that the flatness adjusting jig 2210 can be tightly attached to the battery cell in use. And measuring the flatness of the battery cell at the final visual inspection position, wherein the product flatness specification is as follows: -0.6-0mm.

The adjustment effect of the flatness of the battery case 112 using the flatness adjustment jig 2210 in the present application is significantly improved compared to the general flat jig, and specific data are shown in the following table 1:

TABLE 1

Serial number	Flatness (mm)	Uniformity (alpha)
			Plane clamp	-0.35	0.57
Clamp with convex structure	-0.4	0.13

As can be seen from the data related to table 1, the adjusting effect of the fixture in the present application on the flatness of the battery case 112 is significantly better than the adjusting effect of the flat fixture on the flatness of the battery case 112.

It should be understood that when the flatness adjustment jig in the present application is used to shape the depressed positions 1121 of the battery case 112, although the depressed positions 1121 after shaping have a greater depressed value than the depressed positions 1121 after shaping by the flat jig, they still meet the requirement of the flatness specification (-0.6-0 mm), and the flatness uniformity when the flatness adjustment jig in the present application is used to shape the depressed positions 1121 of the battery case 112 is significantly higher than the flatness uniformity after shaping by the flat jig.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; these modifications and substitutions do not depart from the spirit of the embodiments of the present application, and they should be construed as being included in the scope of the claims and description of the present application. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein, but rather to cover all embodiments falling within the scope of the appended claims.

Claims

1. The flatness adjusting clamp of the battery shell is characterized by comprising a module, wherein a shaping space is formed on the inner surface of the module, a protruding structure is arranged on the inner surface, an unsealed battery monomer with the battery shell can enter or leave the shaping space, when the unsealed battery monomer is arranged in the shaping space, the concave position of the battery shell corresponds to the protruding structure, and the protruding structure is used for abutting against the concave position after swelling.

2. The flatness adjustment jig for battery cases according to claim 1, wherein the outer surface of the convex structure is a convex arc surface.

3. The flatness adjustment jig for a battery case according to claim 2, wherein a protrusion height of an arc top of the convex arc surface is a preset height, and a value of the preset height is within a preset flatness specification range of the battery case.

4. The flatness adjustment jig for battery case according to claim 3, characterized in that the preset height is h, where h e (0 mm, 2mm).

5. The flatness adjustment jig for a battery case according to claim 1, wherein the module includes:

a first mold;

the second mould is arranged opposite to the first mould, the shaping space is formed between the first mould and the second mould, and the first mould and/or the second mould are/is provided with the protruding structures.

6. The flatness adjustment fixture of a battery case according to claim 5, wherein the protruding structures are provided on both the first mold and the second mold, and the protruding structures on the first mold are provided corresponding to the protruding structures on the second mold.

7. The flatness adjustment jig for battery cases according to claim 5, further comprising a driving mechanism, wherein at least one of the first mold and the second mold is in transmission connection with the driving mechanism, the driving mechanism is configured to drive the first mold and the second mold to approach or move away from each other, the unsealed battery cell can enter or move away from the shaping space in a state of moving away from each other, the unsealed battery cell is disposed in the shaping space in a state of moving close to each other, and the recessed position is disposed corresponding to the protruding structure.

8. The flatness adjustment jig of a battery case according to claim 7, wherein the driving mechanism includes:

the first driving piece is in transmission connection with the first die so as to drive the first die to move towards or away from the second die; and/or the presence of a gas in the gas,

and the second driving piece is in transmission connection with the second die so as to drive the second die to move towards the direction close to or far away from the first die.

9. The flatness adjustment fixture of a battery case according to claim 8, wherein the first driving member is a first telescopic cylinder;

and/or the second drive member is a second telescoping cylinder.

10. A flatness adjustment apparatus of a battery case, comprising:

a flatness adjustment jig of a battery case according to any one of claims 1 to 9;

and the helium returning device is used for filling helium into the unsealed battery monomer when the unsealed battery monomer is arranged in the shaping space of the flatness adjusting clamp, so that the concave position of the battery shell of the unsealed battery monomer is deformed outwards and is abutted against the convex structure in the shaping space.

11. The flatness adjustment apparatus of a battery case according to claim 10, wherein the helium returning means includes:

a gas source for storing compressed helium gas;

the inflating nozzle is communicated with the air source;

and the driving component is in transmission connection with the inflating nozzle and is used for driving the inflating nozzle to be communicated with or separated from the unsealed battery monomer.

12. The flatness adjustment apparatus of a battery case according to claim 10, further comprising:

and the control device is electrically connected with the sensing device, the helium returning device and the flatness adjusting clamp respectively.

13. A battery manufacturing system, comprising:

formation equipment;

the flatness adjustment device of the battery case according to any one of claims 10 to 12, which is provided downstream of the formation device;

and the sealing equipment is arranged at the downstream of the flatness adjusting equipment of the battery shell and is used for sealing the battery shell.

14. A method of adjusting flatness of a battery case, which is implemented by the flatness adjustment apparatus of a battery case according to any one of claims 10 to 12, comprising:

receiving the unsealed single battery after the formation process;

controlling an unsealed battery monomer to enter a shaping space of a module of a flatness adjusting clamp, and keeping the unsealed battery monomer in the shaping space;

and controlling a helium returning device to fill helium gas into the unsealed battery monomer according to preset parameters until the sunken position of the battery shell of the unsealed battery monomer is deformed and is abutted with the convex structure of the shaping space.

15. The flatness adjustment method of a battery case according to claim 14, wherein in the step of controlling the introduction of the unsealed battery cell into the shaping space of the flatness adjustment jig and holding the unsealed battery cell in the shaping space, the method comprises:

acquiring whether the unsealed battery monomer exists at a preset position of the reshaping space;

and controlling a first mould and a second mould of the module to approach each other according to the preset position, so as to clamp the unsealed single battery in the shaping space, and enabling the convex structure and the concave position to be correspondingly arranged.

16. The flatness adjustment method of a battery case according to claim 14, wherein the preset parameter includes a preset inflation pressure, where the preset inflation pressure is P, P e (10kpa, 100kpa);

and/or the preset parameter comprises a preset inflation time length, wherein the preset inflation time length is t, t epsilon (2s, 10s).