KR20210059552A - Method and apparatus for manufacturing of secondary battery - Google Patents

Abstract

The present invention provides an apparatus and method for manufacturing a secondary battery capable of increasing secondary battery performance. The method for manufacturing a secondary battery includes a preparation step (S10) of preparing a tray having one or more accommodating grooves formed on an upper surface, and injecting a first electrolyte into the accommodating grooves; a first impregnation step (S20) of accommodating an electrode assembly in the accommodating groove of the tray and impregnating the electrode assembly with the first electrolyte; a sealing step (S30) of sealing the accommodating grooves by coupling a finishing member to an upper portion of the tray; a charging/discharging step (S40) including a charging/discharging process for charging and discharging the electrode assembly by supplying power to the electrode assembly accommodated in the tray; and a second impregnation step (S50) of accommodating the electrode assembly drawn out from the tray in a battery case, and impregnating the electrode assembly by injecting a second electrolyte into the battery case.

Description

Secondary battery manufacturing apparatus and manufacturing method {METHOD AND APPARATUS FOR MANUFACTURING OF SECONDARY BATTERY}

The present invention relates to a secondary battery manufacturing apparatus and manufacturing method that can increase the simplification of the process.

In general, a secondary battery refers to a battery capable of charging and discharging unlike a primary battery that cannot be charged, and such a secondary battery is widely used in the field of advanced electronic devices such as phones, notebook computers, and camcorders.

The secondary batteries are classified into a can-type secondary battery in which an electrode assembly is embedded in a metal can, and a pouch-type secondary battery in which an electrode assembly is embedded in a pouch.

The can-type secondary battery includes an electrode assembly, an electrolyte, a can for accommodating the electrode assembly and the electrolyte, and a cap assembly mounted on the opening of the can, and the pouch-type secondary battery includes an electrode assembly, an electrolyte, and the electrode assembly and the electrolyte. Includes a pouch.

However, the secondary battery has a problem that the manufacturing efficiency is greatly deteriorated as the injection process of injecting the electrolyte solution and the discharge process of discharging gas are performed during the manufacturing process.

Patent registration number 10-0958649

The present invention was invented to solve the above problems, and the present invention is a secondary battery manufacturing apparatus and manufacturing apparatus capable of increasing manufacturing efficiency by eliminating an electrolyte injection process, and increasing secondary battery performance by easily discharging gas. It aims to provide a method.

A method for manufacturing a secondary battery of the present invention for achieving the above object comprises: a preparation step (S10) of preparing a tray having one or more receiving grooves formed on the upper surface and injecting a first electrolyte into the receiving groove; A first impregnation step (S20) of impregnating the electrode assembly with the first electrolyte by accommodating the electrode assembly in the receiving groove of the tray; A sealing step (S30) of sealing the receiving groove by coupling a closing member to the upper portion of the tray; A charging/discharging step (S40) including a charging/discharging process of charging and discharging the electrode assembly by supplying power to the electrode assembly accommodated in the tray; And a second impregnation step (S50) of accommodating the electrode assembly taken out from the tray in a battery case, and injecting a second electrolyte into the battery case to impregnate the electrode assembly.

The first electrolyte and the second electrolyte may be different electrolytes.

In the preparation step, the tray may be made of any one of polychlorotrifluoroethylene (PCTFE), polytetrafluorethylene (PTFE), and chlorotrifluoroethylene (CTFE).

The charging/discharging step (S40) may further include a first pressing process of releasing the pressing force after pressing the surface of the electrode assembly accommodated in the tray for a set time before the charging/discharging process.

The charging/discharging step (S40) may further include a second pressing process of pressing the surface of the electrode assembly during the charging/discharging process to discharge gas generated inside the electrode assembly to the outside of the electrode assembly.

The charging/discharging step S40 may further include a discharging process of sucking gas generated in the receiving groove during charging/discharging of the electrode assembly and discharging it to the outside of the tray.

The charging/discharging step S40 may further include a heating process of heating the first electrolyte solution accommodated in the receiving groove of the tray to increase the temperature to a set temperature.

The set temperature may be 40°C to 50°C.

Between the charging and discharging step (S40) and the second impregnation step (S50), a coating step (S45) of reinforcing the strength of the electrode assembly by forming a coating layer on the outer surface of the electrode assembly on which charging and discharging is completed may be further included. .

The coating step (S45) may include a spraying process of spraying a curing agent onto the outer surface of the electrode assembly, and a curing process of forming a coating layer by curing the curing agent sprayed onto the electrode assembly.

The curing agent may be provided with a material capable of UV curing.

On the other hand, the secondary battery manufacturing apparatus of the present invention includes a tray in which a receiving groove in which a first electrolyte is accommodated is formed and an electrode assembly is accommodated in the receiving groove, and the first electrolyte is first impregnated with the electrode assembly; A closing member coupled to the upper portion of the tray and sealing the receiving groove; A charging/discharging member for charging and discharging the electrode assembly by applying power to the electrode assembly accommodated in the tray; And an injection member for injecting a second electrolyte into the battery case in which the electrode assembly is accommodated, and secondly impregnating the electrode assembly.

A pressing jig for pressing the electrode assembly accommodated in the tray to discharge gas generated inside the electrode assembly to the outside of the electrode assembly; And a heating member for heating the first electrolyte contained in the tray to increase the temperature to a set temperature, and the set temperature may be 40°C to 50°C.

It may further include a suction member for sucking the gas generated in the receiving groove of the tray and discharging it out of the tray.

It may further include a coating member for forming a coating layer for reinforcing strength on the outer surface of the electrode assembly in which the charging and discharging has been completed.

The method for manufacturing a secondary battery of the present invention is characterized in that it includes a first impregnation step of impregnating the electrode assembly with a first electrolyte using a tray. Due to such characteristics, it is not necessary to accommodate the electrode assembly in the battery case, and since the electrolyte injection process can be omitted, the process can be simplified, and the impregnation power of the first electrolyte solution of the electrode assembly can be greatly increased. The assembly can be impregnated with the first electrolyte at the same time, thereby increasing the efficiency of work. In particular, a plurality of electrode assemblies may be impregnated with the same electrolyte solution or may be impregnated with different electrolyte solutions, thereby increasing the diversification of processes.

In addition, the secondary battery manufacturing method of the present invention includes a first pressurization process of first pressing the electrode assembly accommodated in the tray, a charge/discharge process of charging and discharging the electrode assembly accommodated in the tray to activate, and the second pressing during charging and discharging of the electrode assembly. It is characterized in that it includes a charging and discharging step of performing a pressurization process, a discharge process of discharging the gas generated in the tray, and a heating process of heating the electrolyte contained in the tray. Due to these characteristics, the charging/discharging efficiency of the electrode assembly can be greatly improved.In particular, since it is performed in the tray, the process can be simplified, and the gas generated during charging and discharging of the electrode assembly can be immediately discharged, so charging/discharging efficiency. Can be greatly increased.

That is, the first pressurization process discharges gas generated inside the electrode assembly to the outside of the electrode assembly when manufacturing the electrode assembly, or increases the adhesion between the electrode and the separator, thereby increasing charging/discharging efficiency. The charging and discharging process can increase the simplification of the process by charging and discharging the electrode assembly accommodated in the tray, and the second pressurization process can discharge the gas emitted inside the electrode assembly to the outside during charging and discharging, and the discharge process can be performed in the tray. The gas can be quickly and immediately discharged to the outside, and the heating process can increase the impregnation power of the first electrolyte.

In addition, the method of manufacturing a secondary battery of the present invention is characterized in manufacturing a secondary battery by accommodating the electrode assembly and the second electrolyte, which have been charged and discharged, in a battery case. Due to such characteristics, after the activation process, the second electrolyte solution having excellent physical properties can be impregnated into the electrode assembly, and as a result, battery performance can be greatly improved.

In addition, in the secondary battery manufacturing method of the present invention, the tray is made of any one of polychlorotrifluoroethylene (PCTFE), polytetrafluorethylene (PTFE), and chlorotrifluoroethylene (CTFE). It is characterized by being manufactured with. Due to this feature, a tray having high strength can be manufactured, and as a result, it can be used semi-permanently.

In addition, the method for manufacturing a secondary battery of the present invention is characterized in that it includes a coating step of forming a coating layer on the outer surface of the electrode assembly. Due to such characteristics, deformation of the electrode assembly can be prevented, and as a result, the marketability can be improved.

1 is a cross-sectional view showing a secondary battery according to a first embodiment of the present invention.
2 is a cross-sectional view showing a tray, a closing member, a charging/discharging member, a pressing jig, a heating member, and a suction member of the secondary battery manufacturing apparatus according to the first embodiment of the present invention.
3 is a perspective view showing a tray of the secondary battery manufacturing apparatus according to the first embodiment of the present invention.
4 is a view showing a coating member of the secondary battery manufacturing apparatus according to the first embodiment of the present invention.
Figure 5 is a cross-sectional view showing an injection member of the secondary battery manufacturing apparatus according to the first embodiment of the present invention.
6 is a flow chart showing a method of manufacturing a secondary battery according to the first embodiment of the present invention.
7 and 8 are perspective views showing an apparatus for manufacturing a secondary battery according to a second embodiment of the present invention.
9 is a perspective view showing an apparatus for manufacturing a secondary battery according to a third embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art can easily implement the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and similar reference numerals are attached to similar parts throughout the specification.

[Secondary battery according to the first embodiment of the present invention]

Secondary battery 1 according to the first embodiment of the present invention, as shown in Figure 1, the electrode assembly 10, the electrode assembly 10 is accommodated in the battery case 30, the electrode assembly 10 It includes an electrolytic solution to be impregnated, and the electrolytic solution includes a first electrolyte solution 20 that is first impregnated into the electrode assembly 10 for charging and discharging, and a material that is secondly impregnated in the electrode assembly 10 for battery performance after charging and discharging. It contains 2 electrolyte solution (40). That is, the second electrolyte solution 40 is impregnated into the electrode assembly 10 while being accommodated in the battery case 30 together with the electrode assembly 10.

The secondary battery 1 according to the first embodiment of the present invention having such a configuration is manufactured by the secondary battery manufacturing apparatus 100.

[Secondary battery manufacturing apparatus according to the first embodiment of the present invention]

Secondary battery manufacturing apparatus 100 according to the first embodiment of the present invention, as shown in Figs. 2 to 5, the electrode assembly 10 and the first electrolyte 20 are accommodated in the tray 110, the tray ( The finishing member 120 sealing 110, the charging/discharging member 130 for charging and discharging the electrode assembly 10 accommodated in the tray 110, and increasing the temperature of the first electrolyte 20 accommodated in the tray 110 On the surface of the heating member 140, the pressure jig 150 for pressing the electrode assembly 10 accommodated in the tray 110, the suction member 160 for discharging the gas generated in the tray 110, and the electrode assembly 10 A coating member 170 forming the coating layer 50 and an injection member 180 secondarily impregnating the second electrolyte 40 into the electrode assembly 10 accommodated in the battery case 30 are included.

tray

The tray 110 is for charging and discharging the electrode assembly after first impregnating the first electrolyte solution into the electrode assembly, and a receiving groove 111 in which the first electrolyte solution 20 is stored is formed on an upper surface.

That is, when the tray 110 accommodates the electrode assembly 10 in the receiving groove 111 in which the first electrolyte solution 20 is stored, the first electrolyte solution 20 penetrates the electrode assembly 10 and is first impregnated. .

On the other hand, the tray 110 has a plurality of receiving grooves 111, and the plurality of electrode assemblies 10 are simultaneously impregnated with the first electrolyte 20 under the same conditions through the plurality of receiving grooves 111. I can. Of course, different electrolyte solutions may be stored in the plurality of receiving grooves 111, and thus different electrolyte solutions may be impregnated in the plurality of electrode assemblies 10.

Meanwhile, the plurality of receiving grooves 111 may have different sizes or different depths. In addition, some of the receiving grooves 111 may have the same size or depth, and others may have different sizes or different depths. Accordingly, electrode assemblies of various sizes may be simultaneously impregnated with the first electrolyte solution 20 under the same conditions.

Meanwhile, the plurality of receiving grooves 111 have a shape of a square, a triangle, a circle, an oval, and a polygon, and preferably have a rectangular shape.

Meanwhile, the tray 110 is formed of any one of polychlorotrifluoroethylene (PCTFE), polytetrafluorethylene (PTFE), and chlorotrifluoroethylene (CTFE), Accordingly, a tray having high strength can be manufactured, and as a result, it can be used semi-permanently.

In the present invention having such a configuration, the tray 110 can effectively impregnate the first electrolyte solution 20 into the electrode assembly 10, and accommodate the electrode assembly 10 and the first electrolyte solution 20 in the battery case. Since there is no need, the simplification of the process can be increased. In particular, the first electrolyte solution 20 can be sufficiently impregnated into the electrode assembly 10, and the impregnation power of the electrode assembly 10 can be easily confirmed, thereby greatly reducing the occurrence of defects.

Finishing member

The finishing member 120 is for sealing the receiving groove of the tray, a finishing piece 121 provided on the upper portion of the tray 110 and sealing the receiving groove 111 while being in close contact with the upper surface of the tray 110, It includes a cylinder 122 for lowering the finish piece 121 toward the tray 110 or to its original position.

Meanwhile, the finishing piece 121 of the closing member 120 may be formed of the same material as the tray 110. In addition, a sealing portion for increasing the sealing force may be further included on the contact surface between the finishing piece 121 and the tray 110.

On the other hand, the bottom surface of the finishing piece 121 includes an insertion protrusion 121a inserted into the receiving groove 111, and the insertion protrusion 121a is inserted into the receiving groove 111 while the finishing piece 120 and The sealing force between the trays 110 may be increased.

The closing member 120 having such a configuration can prevent the first electrolyte solution 20 stored in the receiving groove 111 from leaking to the outside, thereby increasing the efficiency during charging and discharging of the electrode assembly accommodated in the tray.

Charge/discharge member

The charging/discharging member 130 is for charging and discharging the electrode assembly accommodated in the tray to activate it, and supplies power to the electrode assembly 10 accommodated in the receiving groove 111 of the tray 110 to charge and discharge the electrode assembly. The assembly 10 can be activated.

The charging/discharging member 130 having such a configuration can increase the simplification of the process by charging and discharging the electrode assembly 10 in the tray.

Heating element

The heating member 140 is for increasing the impregnation power of the first electrolyte by increasing the temperature of the first electrolyte 20 stored in the tray 110, and is provided in the receiving groove 111 in which the first electrolyte 20 is stored. Then, the first electrolyte solution 20 is raised to a set temperature through heat generated when power is applied.

Here, the set temperature is set to 40° to 50°. That is, the heating member 140 is not effective in increasing the impregnation power of the first electrolyte solution 20 because heating the first electrolyte solution 20 to 40° or less has little difference from the temperature at room temperature. When 20) is heated to 50° or more, deformation of the electrode assembly 110 accommodated in the tray 110 may occur. Accordingly, the heating member 140 heats the first electrolyte solution 20 to 40° to 50°, thereby effectively impregnating the first electrolyte solution 20 into the electrode assembly 10.

Pressurization jig

The pressing jig 150 is for pressing the surface of the electrode assembly during charging and discharging of the electrode assembly, and is provided on the outer surface of the electrode assembly 10 and the inner wall of the receiving groove 111 corresponding to each of the electrode assembly 10. It includes a pressurizing plate 151 to pressurize with pressure, and a pressurizing cylinder 152 for moving the pressurizing plate 151 toward the electrode assembly 10 or to its original position.

On the other hand, the pressing plate 151 is formed of the same material as the tray 110, thereby increasing the ease of manufacture.

The pressing jig 150 having such a configuration can effectively press the electrode assembly 10 accommodated in the tray 110, and in particular, the gas generated inside the electrode assembly 10 when charging and discharging the electrode assembly is discharged from the electrode assembly ( 10) As it can be discharged to the outside, charging/discharging efficiency can be improved.

Suction member

The suction member 160 stores gas generated during charging and discharging of the electrode assembly in the receiving groove of the tray, and is for discharging the gas stored in the receiving groove to the outside, and is provided on the top of the closing member 120 and is provided with the receiving groove. The gas stored in (111) is sucked and discharged out of the tray (110). In particular, the suction member 160 directly discharges gas generated during charging and discharging of the electrode assembly 10 out of the tray 110, thereby increasing the charging/discharging efficiency of the electrode assembly 10.

Since the suction member having the above configuration does not charge and discharge while the electrode assembly is accommodated in the battery case, the degassing process can be omitted, thereby increasing the simplification of the process.

Coating member

The coating member 170 reinforces the strength of the electrode assembly 10 by forming the coating layer 11 on the outer surface of the electrode assembly 10, thereby preventing the electrode assembly 10 from being deformed.

That is, the coating member 170 is a spraying unit 171 for spraying a curing agent on the outer surface of the electrode assembly 10, and a curing unit for forming the coating layer 50 by curing the curing agent sprayed on the electrode assembly 10 Includes (172).

Here, the coating layer may be formed of a material capable of UV curing.

For example, the coating layer 11 is PVdF-HFP (poly(vinylidene fluoride-co-hexafluoropropylene)), Trimethylpropane triacrylate, 1,4-butandiol diacrylate, 2-Ethyltexyl acrylate, 2-hydroxyprolyl acrylate, pentaerythritol tetra acrylate, pentaerythritol triacryalte, glycidyl acrylate. , tetrahydrofurfuryl methacrylate, ethylene glycol dimethacrylate, and 1,6-hexanediol diacrylate.

The coating member 170 having such a configuration may prevent deformation of the electrode assembly 10 by forming the coating layer 50 on the outer surface of the electrode assembly 10 on which charging and discharging is completed.

Injection member

The injection member 180 is for manufacturing a secondary battery by impregnating a second electrolyte in the electrode assembly completed with charging and discharging, and a second electrolyte solution ( 40) is injected. Then, the electrode assembly 10 may be impregnated with the second electrolyte solution 40. Then, the secondary battery 1 is completed by sealing the opening of the battery case 30.

Here, the second electrolyte solution 40 has different physical properties than the first electrolyte solution 20. That is, the first electrolyte solution 20 has physical properties that increase the charging/discharging efficiency of the electrode assembly 10, and the second electrolyte solution 40 has physical properties that increase the performance of the electrode assembly 10.

Therefore, the secondary battery manufacturing apparatus 100 according to the first embodiment of the present invention impregnates the electrode assembly 10 with the first electrolyte 20 within the tray 110, and charges and discharges the electrode assembly 10. , When the electrode assembly is charged and discharged, a plurality of electrode assemblies can be simultaneously operated by discharging the gas generated in the tray to the outside, so that the efficiency of the operation can be greatly increased, and the simplification of the process can be increased.

Ah, a manufacturing method using the secondary battery manufacturing apparatus 100 according to the first embodiment of the present invention will be described.

[Method of manufacturing secondary battery according to the first embodiment of the present invention]

The secondary battery manufacturing method according to the first embodiment of the present invention, as shown in Figs. 1 to 6, the preparation step (S10), the first impregnation step (S20), the sealing step (S30), the charging and discharging step ( S40), a coating step 45, and a second impregnation step (S50).

Preparation stage

In the preparation step (S10), a tray 110 having one or more receiving grooves 111 formed on the upper surface thereof is prepared, and then the first electrolyte solution 20 is injected into the receiving groove 111.

At this time, the tray 110 is made of any one of polychlorotrifluoroethylene (PCTFE), polytetrafluorethylene (PTFE), and chlorotrifluoroethylene (CTFE), and in particular It is made of polychlorofluoroethylene.

On the other hand, the polychlorofluoroethylene is easier to mold due to lower crystallinity than PTFE, has a lower melting point than PTFE, has high heat resistance and impact resistance, has high transparency (translucent appearance), and electrical properties (low dielectric constant and dielectric tangent). ), mechanical properties (excellent compressive force).

On the other hand, the receiving groove 111 is formed to be regularly arranged on the upper surface of the tray 110, and the corners and vertices are rounded, that is, formed in a curved surface to increase the efficiency of crack generation and cleaning.

1st impregnation step

The first impregnation step (S20) accommodates the electrode assembly 10 in the receiving groove 111 of the tray 110. Then, the first electrolyte solution 20 stored in the receiving groove 111 penetrates into the electrode assembly 10, so that the first electrolyte solution 20 may be impregnated into the electrode assembly 10.

At this time, the first electrolyte solution 20 may be an electrolyte solution having physical properties that can increase the charging/discharging efficiency of the electrode assembly.

On the other hand, the first impregnation step (S20) further includes a control step of adjusting the water level of the first electrolyte solution 20 stored in the receiving groove 111 through the water level controller 112.

The water level controller 112 additionally injects or discharges the first electrolyte solution 20 into the receiving groove 111 and a water level gauge 112a that checks the level of the first electrolyte solution 20 stored in the receiving groove 111 It includes an adjustment unit (112b) for adjusting the water level.

Accordingly, in the first impregnation step (S20), the water level of the first electrolyte solution 20 stored in the receiving groove 111 may be kept constant through a control process.

Sealing stage

In the sealing step (S30), the receiving groove 111 is sealed by coupling the finishing member 120 to the upper surface of the tray 110. That is, the receiving groove 111 of the tray 110 in which the electrode assembly 10 is accommodated is sealed through the closing member 120. Meanwhile, the closing member 120 may be coupled to the tray 110 through a buckle or a clip.

Charging/discharging stage

The charging and discharging step S40 includes a first pressing process, a heating process, a charging/discharging process, and a second pressing process and discharging process.

In the first pressing process, before charging and discharging the electrode assembly, the surface of the electrode assembly 10 accommodated in the tray 110 is pressed for a set time using a pressing jig 150 and then the pressing force is released. That is, the first pressurization process reinforces weakening of the adhesion between the electrode and the separator included in the electrode assembly 10 in the first impregnation step, and discharges the gas generated between the electrode and the separator to the outside of the electrode assembly. On the other hand, the setting time is set to 10 minutes to 1 hour.

In the heating process, the first electrolyte solution 20 in the receiving groove 111 in which the electrode assembly is accommodated is heated by using the heating member 130 to increase to a set temperature. Accordingly, the impregnation power of the electrode assembly 10 of the first electrolyte solution 20 may be increased. Meanwhile, the set temperature may be 40° to 50°.

The charging/discharging process is activated by charging and discharging the electrode assembly 10 accommodated in the receiving groove 111 using the charging/discharging member 140. Here, gas is generated when the electrode assembly 10 is charged and discharged, and the pressure gradually increases as the gas is stored in the receiving groove 111.

In the second pressurization process, gas generated inside the electrode assembly 10 is discharged out of the electrode assembly by pressing the surface of the electrode assembly 10 during the charging and discharging process of the electrode assembly using a pressing jig 150. .

In the discharge process, the gas generated in the receiving groove 111 is sucked through the suction member 160 during the charging/discharging process and then discharged out of the tray 110.

When such a process is completed, activation of the electrode assembly is completed.

Coating step

The coating step (S45) is to prevent deformation of the electrode assembly pulled out from the tray. After the electrode assembly 10 is pulled out from the tray 110, the coating member 170 is divided on the outer surface of the electrode assembly 10. The spraying process of spraying the curing agent through the thread part 171 and the curing process of forming the coating layer 50 by curing the curing agent sprayed on the electrode assembly 10 through the curing part 172 of the coating member 170 Includes.

Through this process, a coating layer for reinforcing strength may be formed on the outer surface of the electrode assembly. Meanwhile, the curing agent uses a material capable of UV curing.

Second impregnation step

In the second impregnation step (S50), after the electrode assembly on which the coating layer is formed is withdrawn, the electrode assembly 10 is accommodated in the battery case 30. Next, the second electrolyte solution 40 is injected into the battery case 30 using the injection member 180. Here, the second electrolyte solution 40 is an electrolyte solution different from the first electrolyte solution 20. Then, the second electrolyte solution 40 injected into the battery case 30 penetrates into the electrode assembly 10 and is impregnated secondarily. Next, the opening of the battery case 30 is sealed. Then, the finished secondary battery 1 can be manufactured.

Hereinafter, in describing another embodiment of the present invention, the same component numerals are used for components having the same functions as those of the above-described embodiment, and redundant descriptions will be omitted.

[Secondary battery manufacturing apparatus according to the second embodiment of the present invention]

In the secondary battery manufacturing apparatus 100 according to the second embodiment of the present invention, the pressing jig 150 includes a pressing plate 151 and a pressing cylinder 152 as shown in FIGS. 7 and 8.

Here, the pressure cylinder 152 is installed on the inner wall of the receiving groove 111 so that the position can be adjusted in the left and right directions. That is, the pressure cylinder 152 is slidably coupled to the first slide portion 111a formed in the left and right directions on the inner wall of the receiving groove 111 so as to be slidable in the left and right direction, and accordingly, the pressure plate 151 coupled to the pressure cylinder 152 ) Can be moved left and right.

On the other hand, the pressure plate 151 is installed in the pressure cylinder 152 so as to be able to adjust its position in the vertical direction. That is, the pressure plate 151 is slidably coupled to the second slide portion 152a formed on the piston of the pressure cylinder 152 so as to be slidable in the vertical direction, and accordingly, the pressure plate 151 can be moved vertically.

Therefore, the pressing jig 150 can move up, down, left and right according to the position of the electrode assembly, and accordingly, can stably press the electrode assembly.

[Secondary battery manufacturing apparatus according to the third embodiment of the present invention]

In the secondary battery manufacturing apparatus 100 according to the third embodiment of the present invention, the tray 110 includes a plurality of receiving portions 110a, as shown in FIG. 9, and the upper surface of the receiving portion 110a In the receiving groove 111 is formed.

Here, the plurality of receiving portions 110a have a structure that is detachably coupled to each other.

That is, the plurality of receiving portions 110a are detachably coupled through the defect grooves 114 and the engaging protrusions 113 respectively formed on corresponding surfaces corresponding to each other.

Accordingly, the secondary battery manufacturing apparatus 100 according to the third embodiment of the present invention may constitute a tray by combining the receiving portions as many as necessary.

The scope of the present invention is indicated by the claims to be described later rather than the detailed description, and various embodiments derived from the meaning and scope of the claims and their equivalent concepts are possible.

110: tray
120: finishing member
130: charge/discharge member
140: heating member
150: pressure jig
160: suction member
170: coating member
180: injection member

Claims (15)

A preparation step (S10) of preparing a tray having one or more receiving grooves formed on an upper surface thereof and injecting a first electrolyte into the receiving groove;
A first impregnation step (S20) of impregnating the electrode assembly with the first electrolyte by accommodating the electrode assembly in the receiving groove of the tray;
A sealing step (S30) of sealing the receiving groove by coupling a closing member to the upper portion of the tray;
A charging/discharging step (S40) including a charging/discharging process of charging and discharging the electrode assembly by supplying power to the electrode assembly accommodated in the tray; And
A method for manufacturing a secondary battery comprising a second impregnation step (S50) of accommodating the electrode assembly drawn out from the tray in a battery case, and impregnating the electrode assembly by injecting a second electrolyte into the battery case. The method according to claim 1,
The method of manufacturing a secondary battery in which the first electrolyte and the second electrolyte are different electrolytes. The method according to claim 1,
In the preparation step, the tray is made of any one of polychlorotrifluoroethylene (PCTFE), polytetrafluorethylene (PTFE), and chlorotrifluoroethylene (CTFE). Way. The method according to claim 1,
The charging/discharging step (S40) further comprises a first pressing step of releasing the pressing force after pressing the surface of the electrode assembly accommodated in the tray for a set time before the charging/discharging step. The method of claim 4,
The charging/discharging step (S40) further comprises a second pressing step of discharging the gas generated inside the electrode assembly to the outside of the electrode assembly by pressing the surface of the electrode assembly during the charging/discharging process. The method of claim 5,
The charging/discharging step (S40) further includes a discharge step of sucking gas generated in the receiving groove during charging and discharging of the electrode assembly and discharging the gas to the outside of the tray. The method of claim 6,
The charging/discharging step (S40) further includes a heating step of heating the first electrolyte solution accommodated in the receiving groove of the tray to increase the temperature to a set temperature. The method of claim 7,
The set temperature is 40 ℃ ~ 50 ℃ secondary battery manufacturing method. The method according to claim 1,
A secondary battery further comprising a coating step (S45) of reinforcing the strength of the electrode assembly by forming a coating layer on the outer surface of the electrode assembly on which charging and discharging is completed between the charging/discharging step (S40) and the second impregnation step (S50). Manufacturing method. The method of claim 9,
The coating step (S45) includes a spraying process of spraying a curing agent onto an outer surface of the electrode assembly, and a curing process of forming a coating layer by curing the curing agent sprayed onto the electrode assembly. The method of claim 10,
The curing agent is a secondary battery manufacturing method provided with a material capable of UV curing. A tray in which a receiving groove in which a first electrolyte is accommodated is formed, an electrode assembly is received in the receiving groove, and the first electrolyte is first impregnated with the electrode assembly;
A closing member coupled to the upper portion of the tray and sealing the receiving groove;
A charging/discharging member for charging and discharging the electrode assembly by applying power to the electrode assembly accommodated in the tray; And
A secondary battery manufacturing apparatus comprising an injection member for injecting a second electrolyte into the battery case in which the electrode assembly is accommodated and secondly impregnating the electrode assembly. The method of claim 12,
A pressing jig for pressing the electrode assembly accommodated in the tray to discharge gas generated inside the electrode assembly to the outside of the electrode assembly; And a heating member for heating the first electrolyte contained in the tray to increase the temperature to a set temperature,
The set temperature is 40 ℃ ~ 50 ℃ secondary battery manufacturing apparatus. The method of claim 12,
Secondary battery manufacturing apparatus further comprising a suction member for sucking the gas generated in the receiving groove of the tray and discharging it out of the tray. The method of claim 12,
Secondary battery manufacturing apparatus further comprising a coating member for forming a coating layer for reinforcing strength on an outer surface of the electrode assembly on which the charging and discharging has been completed.

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