KR20200125024A - Electrode assembly manufacturing equipment, electrode assembly manufactured from thereof and rechargeable battery - Google Patents

Abstract

The present invention relates to an electrode assembly manufacturing apparatus, to an electrode assembly manufactured therefrom, and to a secondary battery. According to the electrode assembly manufacturing apparatus according to the present invention, the electrode assembly is manufactured by lamination of laminates of alternately stacked electrodes and separators. The electrode assembly manufacturing apparatus comprises: a heating unit for applying heat to the laminates; a pressurizing stamp pressurizing and joining upper portions of the laminates seated on a support block and including a magnetic body; and a magnetic field generating unit for applying a magnetic field pulse to the pressurizing stamp, wherein the pressurizing stamp is moved so that the magnetic field generating unit pressurizes the laminates heated by applying the magnetic field pulse to the pressurizing stamp.

Description

Electrode assembly manufacturing apparatus, and electrode assembly and secondary battery manufactured through the device {ELECTRODE ASSEMBLY MANUFACTURING EQUIPMENT, ELECTRODE ASSEMBLY MANUFACTURED FROM THEREOF AND RECHARGEABLE BATTERY}

The present invention relates to an electrode assembly manufacturing apparatus, and an electrode assembly and a secondary battery manufactured therethrough.

Unlike primary batteries, secondary batteries can be recharged, and due to their small size and large capacity, many research and developments have been made in recent years. As technology development and demand for mobile devices increase, the demand for secondary batteries as an energy source is rapidly increasing.

Secondary batteries are classified into coin-type batteries, cylindrical batteries, prismatic batteries, and pouch-type batteries according to the shape of the battery case. In a secondary battery, an electrode assembly mounted inside a battery case is a power plant capable of charging and discharging having a stacked structure of electrodes and separators.

The electrode assembly is a jelly-roll type in which a separator is interposed between a sheet-shaped positive electrode and a negative electrode coated with an active material, and a stack type in which a plurality of positive and negative electrodes are sequentially stacked with a separator interposed therebetween. , And stacked unit cells can be roughly classified into a stack & folding type wound with a long separation film.

Here, in the case of laminating and bonding a stack of electrodes and separators in a stacked electrode assembly, a roll lamination method was used in the prior art. In this case, there has been a problem in that the bonding between the electrode and the separator is not uniformly bonded. In addition, there has been a problem in that the peripheral portion of the electrode tab provided at the end of the electrode is not well bonded.

That is, it has been difficult to evenly press the surface to be pressed due to the thickness variation of each position of the electrode, and the peripheral portion where the electrode tab is located in the electrode has a relatively thin thickness so that it is difficult to press well, and there has been a problem that bonding failure occurs.

Korean Patent Application Publication No. 10-2014-0015647

One aspect of the present invention is to provide an electrode assembly manufacturing apparatus capable of uniform bonding of an electrode and a separator, and an electrode assembly and a secondary battery manufactured through the same.

An electrode assembly manufacturing apparatus according to an embodiment of the present invention is an apparatus for manufacturing an electrode assembly by laminating a stack of alternately stacked electrodes and a separator, comprising: a heating unit for applying heat to the stack, and a support block A magnetic field pulse from the magnetic field generator to the pressure stamp, including a pressure stamp including a magnetic material and a magnetic field generator for applying a magnetic field pulse to the pressure stamp by pressing and bonding the upper portion of the laminate mounted on the laminate. The pressure stamp can be moved to pressurize the heated laminate by applying (Pulse).

According to the present invention, it is possible to pressurize the entire surface to be pressed by applying a magnetic field pulse to pressurize the stack of electrodes and separators through a pressurizing stamp, so that uniform pressurization is possible and the pressurization process can be easily performed.

In addition, according to the present invention, a flexible member is further provided on the pressing side of the pressing stamp, thereby compensating for a thickness deviation of each position of the electrode, and more evenly pressing the entire area of the pressed surface.

1 is a block diagram showing the concept of an electrode assembly manufacturing apparatus according to an embodiment of the present invention.
2 is a perspective view showing an exemplary electrode assembly manufacturing apparatus according to an embodiment of the present invention.
3 is a right side view showing a state before pressing a laminate through a pressing stamp in the electrode assembly manufacturing apparatus according to an embodiment of the present invention.
4 is a right side view showing a state in which a laminate is pressed through a pressure stamp in the electrode assembly manufacturing apparatus according to an embodiment of the present invention.
5 is a front view showing a transfer means in the electrode assembly manufacturing apparatus according to an embodiment of the present invention.
6 is a front view showing a process of heating a laminate in the electrode assembly manufacturing apparatus according to an embodiment of the present invention.
7 is a front view showing a process of pressing a laminate in the electrode assembly manufacturing apparatus according to an embodiment of the present invention.
8 is a front view showing a process in which a laminate is pressed through a pressure stamp and a pressure stamp moves along the laminate in the electrode assembly manufacturing apparatus according to an embodiment of the present invention.
9 is a front view showing a process of releasing a pressing force by a pressing stamp in the electrode assembly manufacturing apparatus according to an embodiment of the present invention.
10 is a front view showing a process in which the pressure stamp is originally positioned in the electrode assembly manufacturing apparatus according to an embodiment of the present invention.
11 is a perspective view schematically showing an electrode assembly manufacturing apparatus according to another embodiment of the present invention.
12 is a front view showing a preparation process in which a heating unit heats a pressurized stamp in an electrode assembly manufacturing apparatus according to another embodiment of the present invention.
13 is a front view showing a process of heating and pressing a laminate in the electrode assembly manufacturing apparatus according to another embodiment of the present invention.
14 is a front view showing a process in which a laminate is pressed through a pressure stamp in an electrode assembly manufacturing apparatus according to another embodiment of the present invention and a pressure stamp moves along the laminate.
15 is a front view showing a process of releasing a pressing force by a pressing stamp in an electrode assembly manufacturing apparatus according to another embodiment of the present invention.
16 is a front view showing a process in which a pressure stamp is originally positioned in an electrode assembly manufacturing apparatus according to another embodiment of the present invention.

Objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments associated with the accompanying drawings. In adding reference numerals to elements of each drawing in the present specification, it should be noted that, even though they are indicated on different drawings, only the same elements are to have the same number as possible. In addition, the present invention may be implemented in various forms and is not limited to the embodiments described herein. In addition, in describing the present invention, detailed descriptions of related known technologies that may unnecessarily obscure the subject matter of the present invention will be omitted.

1 is a block diagram showing the concept of an electrode assembly manufacturing apparatus according to an embodiment of the present invention, and FIG. 2 is a perspective view exemplarily showing an electrode assembly manufacturing apparatus according to an embodiment of the present invention.

1 and 2, the electrode assembly manufacturing apparatus 100 according to an embodiment of the present invention includes a heating unit 140 for applying heat to the stack 10 of the electrode 13 and the separators 14 and 15. ), and a magnetic field generator 170 that pressurizes and bonds the upper portion of the laminate 10, and applies a magnetic field pulse to the pressurization stamp 150 and the pressurization stamp 150 including a magnetic material. Includes.

In addition, the electrode assembly manufacturing apparatus 100 according to an embodiment of the present invention includes a flexible member provided on the side for pressing the stack 10 and the stack 10 toward the pressing stamp 150. The transfer unit 120 to be transferred, the guide means 130 for guiding the vertical movement of the pressure stamp 150, and the pressure stamp 150 and the magnetic field generating unit 170 are formed of the stacked body 10. It may further include a moving means 180 for moving to correspond to the driving position, and a supply unit 110 for supplying the electrode 13 and the separators 14 and 15 toward the pressure stamp 150.

Hereinafter, an apparatus for manufacturing an electrode assembly according to an embodiment of the present invention will be described in more detail with reference to FIGS. 1 to 10.

1 and 2, the electrode assembly manufacturing apparatus 100 according to an embodiment of the present invention laminates the stacked bodies 10 of alternately stacked electrodes 13 and separators 14 and 15. ) To manufacture the electrode assembly 10'.

Here, the electrode 13 includes an anode 11 and a cathode 12, and the electrode assembly manufacturing apparatus 100 is an electrode assembly by stacking the anode 11, the separators 14 and 15, and the cathode 12. (10') can be prepared.

The electrode assembly 10 ′ is a power generating device capable of charging and discharging, and may be formed in a form in which the anode 11, the separators 14 and 15, and the cathode 12 are alternately stacked.

Meanwhile, the anode 11 may have an anode tab 16 at an end thereof, and the cathode 12 may have a cathode tab 17 at an end thereof. That is, the electrode tab 18 including the positive electrode tab 16 and the negative electrode tab 17 may be provided at the end of the electrode 13.

The positive electrode 11 may include a positive electrode current collector 11a and a positive electrode active material 11b applied to the positive electrode current collector 11a. The positive electrode current collector 11a may be formed of, for example, a foil made of aluminum, and the positive electrode active material 11b is, for example, lithium manganese oxide, lithium cobalt oxide, lithium nickel oxide, lithium iron phosphate, or among these It may be made of a compound and a mixture containing one or more.

The negative electrode 12 may include a negative electrode current collector 12a and a negative active material 12b applied to the negative electrode current collector 12a. The negative electrode current collector 12a may be formed of, for example, a foil made of copper (Cu) or nickel (Ni). The negative active material 12b may be made of, for example, artificial graphite, lithium metal, lithium alloy, carbon, petroleum coke, activated carbon, graphite, silicon compound, tin compound, titanium compound, or alloys thereof. In this case, the negative active material 12b may further include, for example, non-graphitic silica (SiO) or silicon carbide (SiC).

The separation membranes 14 and 15 may be made of an insulating material and a material having ductility. At this time, the separators 14 and 15 may be formed of, for example, a polyolefin-based resin film such as polyethylene or polypropylene having microporosity.

The supply unit 110 may supply the electrode 13 and the separators 14 and 15 toward the pressure stamp 150.

In addition, the supply unit 110 may include an electrode supply roll 111 on which the electrode 13 is wound, and a separation membrane supply roll 112 on which the separation membranes 14 and 15 are wound. Here, the electrodes 13 wound around the electrode supply roll 111 and the separation membranes 14 and 15 wound around the separation membrane supply roll 112 are released and may be moved toward the pressure stamp 150. At this time, when the electrode 13 is moved from the electrode supply roll 111 to the pressure stamp 150 side, the electrode 13 may be cut to a predetermined size by the cutters C1 and C2. Meanwhile, when the separation membranes 14 and 15 are moved from the separation membrane supply roll 112 to the pressure stamp 150, they may be cut to a certain size, or may be moved in a sheet form and then laminated to a certain size.

The electrode supply roll 111 may include an anode supply roll 111a on which the anode 11 is wound and a cathode supply roll 111b on which the cathode 12 is wound.

The separation membrane supply roll 112 includes a first separation membrane supply roll 112a on which one separation membrane 14 is wound from among a plurality of separation membranes 14 and 15, and a second separation membrane supply roll on which the other separation membrane 15 is wound. (112b) may be included.

On the other hand, the supply unit 110 may be sequentially stacked in the order of the separator 15, the cathode 12, the separator 14, and the anode 11 to be supplied to the pressure stamp 150 side as the stack 10, but the stacked body The stacking order of (10) is not necessarily limited to this, for example, stacking in various stacking orders such as stacking the separator 15, the anode 11, the separator 14, and the cathode 12 in that order. Of course you can.

The heating unit 140 may be heated by applying heat to the laminate 10 of the electrode 13 and the separators 14 and 15.

In addition, the heating unit 140 may include an upper heating block 141 and a lower heating block 142 for heating the upper and lower sides of the stacked body 10. In this case, the upper heating block 141 and the lower heating block 142 may have, for example, built-in heaters. Here, the heating unit 140 may be in contact with the stacked body 10 to heat the stacked body 10 or spaced apart from the stacked body 10 by a predetermined distance to heat the stacked body 10.

In addition, the heating unit 140 is provided so as to be spaced apart from the pressure stamp 150 by a predetermined distance, and may be positioned at a position before moving toward the pressure stamp 150 with respect to the running direction S of the stacked body 10.

The transfer unit 120 may transfer the stacked body 10 of the electrode 13 and the separators 14 and 15 to each process step.

Here, the transfer unit 120 may transfer the stacked body 10 to the heating unit 140 to heat the stacked body 10 in the heating unit 140. In addition, the laminate 10 heated by the heating unit 140 may be transferred to the pressure stamp 150 side. In addition, the laminated body 10 that is pressed and bonded by the pressure stamp 150 may be transferred to a later process.

In addition, the transfer unit 120 may include, for example, a transfer belt (Belt). In this case, the stacked body 10 may be seated on a moving transfer belt and traveled. Here, the transport belt may be transported by sliding along the upper surface of the support block (B), or may be transported at a predetermined interval.

On the other hand, the transfer unit 120, for example, the electrode 13 supplied from the supply unit 110 and the stack 10 of the separators 14, 15, the heating unit 140, the pressure stamp 150, and subsequent processes. Can be moved continuously.

And, as another example, the transfer unit 120 includes the electrode 13 supplied from the supply unit 110 and the stacked body 10 of the separators 14, 15, the heating unit 140, the pressurization stamp 150, and subsequent processes. Whenever it arrives, the movement is stopped, and the stack 10 can be moved after each process is completed.

3 is a right side view showing a state before pressing a laminate through a pressing stamp in the electrode assembly manufacturing apparatus according to an embodiment of the present invention, and FIG. 4 is a pressurization in the electrode assembly manufacturing apparatus according to an embodiment of the present invention. It is a right side view showing a state in which the laminate is pressed through a stamp.

2 to 4, the pressure stamp 150 may be bonded by pressing the upper portion of the laminate 10 mounted on the support block (B).

The support block (B) may be located in the lower direction of the pressure stamp 150 and the stacked body 10 running on the upper side may be located. Here, the stacked body 10 may be seated in contact with the support block B, or may be seated on the support block B with the transport unit 120 interposed therebetween when being transported by the transport unit 120.

In addition, the pressure stamp 150 may be formed of, for example, a square block.

In addition, the pressure stamp 150 may include a magnetic material. Here, the magnetic material may be made of, for example, a permanent magnet.

The magnetic field generator 170 may move the pressure stamp 150 by applying a magnetic field pulse to the pressure stamp 150 with the pressure stamp 150. Accordingly, when the pressure stamp 150 is moved downward by the magnetic field pulse generated from the magnetic field generator 170, the electrode 13 of the laminate 10 heated by pressing the upper portion of the laminate 10 and The separation membranes 14 and 15 may be bonded to each other.

In addition, the magnetic field generator 170 may include an electromagnet, for example. Here, when electricity is applied to the magnetic field generator 170, a magnetic field pulse acts, and when electricity is released, an action of the magnetic field pulse may be canceled. At this time, when electricity is applied to the magnetic field generating unit 170, the magnetic field generating unit 170 and the pressing stamp 150 have the same polarity, and the pressing stamp ( 150) can be moved downward.

The flexible member 160 may be provided on a side of the pressure stamp 150 that presses the stacked body 10.

In addition, the flexible member 160 may be provided with a polymer buffer on the pressing side of the pressing stamp 150.

In addition, the flexible member 160 may be formed by coating the pressing surface of the pressing stamp 150, for example. Here, the flexible member 160 may be specifically formed of, for example, polyethylene terephthalate (PET) film or urethane foam.

The guide means 130 may have an end coupled to the pressure stamp 150 to guide the vertical movement of the pressure stamp 150.

In addition, the guide means 130 may be made of, for example, a pneumatic actuator. At this time, the action of the magnetic field pulse that moves the pressure stamp 150 downward is released, and after the pressure of the laminate 10 is completed, the pressure stamp 150 may be moved upward by a pneumatic actuator. Here, the upper movement of the pressure stamp 150 may be moved by the guide means 130, and the lower movement may be moved by the magnetic field pulse of the magnetic field generator 170.

5 is a front view showing a transfer means in the electrode assembly manufacturing apparatus according to an embodiment of the present invention.

2 and 5, the moving means 180 may move the pressure stamp 150 and the magnetic field generating unit 170 to correspond to the driving position of the stacked body 10.

In addition, the moving means 180 may include a motor 181, a screw shaft 182 rotated by the motor 181, and a moving block 183 coupled to the screw shaft 182.

The motor 181 may provide a driving force required for movement. In addition, the motor 181 may be formed of, for example, a servo-motor or a step motor.

The screw shaft 182 may be positioned parallel to the traveling direction of the stacked body 10.

The movable block 183 has a screw hole 183a coupled to the screw shaft 182, and a magnetic field generating unit 170 and a guide means 130 may be mounted.

Therefore, when the screw shaft 182 is rotated by the motor 181, the moving block 183 is linearly moved along the screw shaft 182, and the pressure stamp coupled to the magnetic field generating unit 170 and the guide means 130 (150) can be moved.

Referring to FIG. 2, the position sensor 190 may detect the moving position of the stacked body 10. Here, the position sensor 190 may be formed of, for example, a vision sensor or a laser sensor. In this case, the position detection sensor may detect the moving position of the stacked body 10 by a method such as contrast (contrast) recognition, red-green-blue (RGB) numerical recognition, or laser sensor detection.

1, 2 and 5, the controller P may control the operation of the motor 181 of the moving means 180. In addition, the control unit P receives the position measurement value of the stack 10 from the position sensor 190 and controls the motor 181 to correspond to the moving position of the stack 10 to press the stamp 150 And the magnetic field generator 170 may be moved.

Here, the control unit P may control the moving speed of the moving block 183 screwed to the screw shaft 182 by adjusting the rotation speed of the motor 181. Accordingly, the control unit P moves the movement of the magnetic field generating unit 170 mounted on the moving block 183 and the pressure stamp 150 coupled to the guide means 130 so as to correspond to the moving speed of the stack 10 It is possible to improve the bonding quality of the laminate 10 by continuously pressing the moved laminate 10. At this time, the control unit P may rotate the screw shaft 182 in one direction through the motor 181 to advance the moving block 183 in the moving direction of the stack 10, and the screw through the motor 181 By rotating the shaft 182 in the other direction, the moving block 183 may be moved in a direction opposite to the moving direction of the stacked body 10.

In addition, the controller P may move the pressure stamp 150 through the moving means 180 and press the stack 10 for 0.1 to 10 seconds.

On the other hand, the control unit P is electrically connected to each of the devices of the electrode assembly manufacturing apparatus 100 such as the heating unit 140, the magnetic field generating unit 170, and the guide means 130 to control the operation of each device. Can be controlled.

At this time, the control unit P applies electricity to the magnetic field generating unit 170, for example, when pressing the stacked body 10 to apply a magnetic field pulse to the pressurizing stamp 150 to move the pressurizing stamp 150, It is possible to control not to apply electricity to the guide means 130. In addition, when the pressurization of the stacked body 10 is completed, the control unit P cuts off electricity to the magnetic field generating unit 170 to release the action of the magnetic field pulse, and applies electricity to the guide means 130 to press the stamp 150 ) Can be moved to the top.

6 is a front view showing a process of heating a laminate in the electrode assembly manufacturing apparatus according to an embodiment of the present invention, and FIG. 7 is a process of pressing the laminate in the electrode assembly manufacturing apparatus according to an embodiment of the present invention. It is a front view shown, and FIG. 8 is a front view showing a process in which a laminate is pressed through a pressure stamp in the electrode assembly manufacturing apparatus according to an embodiment of the present invention and the pressure stamp moves along the laminate.

In addition, Figure 9 is a front view showing a process of releasing the pressing pressure in the electrode assembly manufacturing apparatus according to an embodiment of the present invention, Figure 10 is a pressure stamp in the electrode assembly manufacturing apparatus according to an embodiment of the present invention It is a front view showing the process of repositioning.

Hereinafter, an operation of the electrode assembly manufacturing apparatus 100 according to an embodiment of the present invention will be described with reference to FIGS. 6 to 10.

Referring to FIG. 6, the laminate 10 of the electrode 13 and the separators 14 and 15 is heated by the heating unit 140, and the transfer unit 120 presses the heated laminate 10 with a pressure stamp ( 150). In this case, the laminate 10 may be heated while passing between the upper heating block 141 and the lower heating block 142 of the heating unit 140.

Thereafter, referring to FIG. 7, when the stack 10 reaches the lower direction of the pressurization stamp 150, the magnetic field generator 170 applies a magnetic field pulse to the pressurization stamp 150 to lower the pressurization stamp 150. Move. At this time, under the influence of the magnetic field pulse, the pressure stamp 150 is moved in the direction of the laminate 10 and presses the laminate 10, and the electrode 13 and the separator 14 of the laminate 10 heated by the pressing force ,15) are bonded to each other to manufacture the electrode assembly 10'. Here, as the flexible member 160 is provided on the pressing side of the pressing stamp 150 to press the stacked body 10, a thickness deviation of the electrode 13 for each position is compensated, and remarkably uniform pressing may be possible.

Thereafter, referring to FIG. 8, the position sensor 190 detects the moving position of the stack 10 when the stack 10 is running, and the control unit P corresponds to the moving position of the stack 10 The pressure stamp 150 is moved through the moving means 180 so that the driven stack 10 may be pressed for 0.1 to 10 seconds. Accordingly, it is possible to sufficiently secure the pressing time of the stacked body 10, so that the bonding quality can be further improved, and since the stacking body 10 can be transferred and pressed, the manufacturing time can be shortened and the production amount can be improved.

Thereafter, referring to FIG. 9, when the bonding of the stacked body 10 is completed, the control unit P stops the operation of the magnetic field generator 170 and guides the pressure stamp 150 coupled to the guide means 130. It can be moved upward by the pneumatic pressure of the pneumatic actuator which is the means 130. Further, referring to FIG. 2, the laminated body 10 on which the bonding is completed may be cut to a predetermined size by a cutter C3 to be manufactured as an electrode assembly 10 ′.

Thereafter, referring to FIG. 10, the controller P may return the pressure stamp 150 to the origin in the opposite direction from the running direction S of the stacked body 10 through the moving means 180.

Hereinafter, an apparatus for manufacturing an electrode assembly according to another embodiment of the present invention will be described.

11 is a perspective view schematically showing an electrode assembly manufacturing apparatus according to another embodiment of the present invention.

Referring to FIG. 11, an electrode assembly manufacturing apparatus 200 according to another embodiment of the present invention includes a heating unit 240 for applying heat to the stack 10 of the electrode 13 and the separators 14 and 15, The upper portion of the laminate 10 is pressed and bonded, and a pressure stamp 150 including a magnetic material, a magnetic field generator 170 for moving by applying a magnetic field pulse to the pressure stamp 150, and the laminate 10 are provided. A flexible member provided on the pressurizing side, a transfer unit 120 for transferring the stacked body 10 to the pressurizing stamp 150 side, and a guide means for guiding the vertical movement of the pressurizing stamp 150 ( 130), a moving means 180 for moving the pressure stamp 150 and the magnetic field generating unit 170 to correspond to the driving position of the stack 10, and the electrode 13 and the separator ( It includes a supply unit 110 for supplying 14 and 15).

The electrode assembly manufacturing apparatus 200 according to another exemplary embodiment of the present invention has a difference in the configuration and position of the heating unit 240 as compared to the electrode assembly manufacturing apparatus according to the above-described exemplary embodiment. Accordingly, in the present exemplary embodiment, overlapping content with the exemplary embodiment will be omitted or briefly described, and the differences will be mainly described.

In more detail, in the electrode assembly manufacturing apparatus 200 according to another embodiment of the present invention, the heating unit 240 may include a heating plate.

Here, the heating plate may be positioned between the pressure stamp 150 and the flexible member 160.

Accordingly, when pressing the electrode 13 and the stacked body 10 of the separators 14 and 15 with the pressing stamp 150, it is possible to simultaneously apply heat and pressurize. Accordingly, the manufacturing time is significantly reduced, and the temperature of the laminate 10 is lowered in the process of moving after the laminate 10 is heated by the heating unit 240, thereby preventing deterioration of bonding quality.

Meanwhile, the heating plate may continuously heat the pressurization stamp 150 and the flexible member 160 by means of resistance heat, as a heating wire is positioned therein. Accordingly, when the pressure stamp 150 is moved to press the laminate 10, the laminate 10 may be heated to a uniform temperature.

12 is a front view showing a preparation process in which a heating unit heats a pressurized stamp in an electrode assembly manufacturing apparatus according to another embodiment of the present invention, and FIG. 13 is a heating laminate in an electrode assembly manufacturing apparatus according to another embodiment of the present invention. And a front view showing a process of pressing, and FIG. 14 is a front view showing a process of moving a pressure stamp along the laminate while pressing a laminate through a pressure stamp in an electrode assembly manufacturing apparatus according to another embodiment of the present invention.

In addition, FIG. 15 is a front view showing a process of releasing a pressing force by a pressing stamp in an electrode assembly manufacturing apparatus according to another embodiment of the present invention, and FIG. 16 is a pressing stamp in the electrode assembly manufacturing apparatus according to another embodiment of the present invention. It is a front view showing the process of repositioning.

Hereinafter, an operation of the electrode assembly manufacturing apparatus 200 according to another embodiment of the present invention will be described with reference to FIGS. 12 to 16.

Referring to FIG. 12, the heating plate of the heating unit 240 is positioned between the pressure stamp 150 and the flexible member 160, and continuously heats the pressure stamp 150 and the flexible member 160 to provide a constant heating. Keep the temperature.

Thereafter, referring to FIG. 13, when the stack 10 reaches the lower direction of the pressurization stamp 150, the magnetic field generator 170 applies a magnetic field pulse to the pressurization stamp 150 to lower the pressurization stamp 150. Move. Here, under the influence of the magnetic field pulse, the pressure stamp 150 is moved in the direction of the stacked body 10 and presses the stacked body 10. In this case, the laminate 10 may be heated and pressed by the heated press stamp 150 and the flexible member 160 and bonded. Accordingly, it is possible to maintain a uniform heating temperature, heat and pressurize the laminate 10, thereby improving the bonding strength between the electrode 13 and the separators 14 and 15, and enabling uniform bonding.

Thereafter, referring to FIG. 14, the position detection sensor 190 senses the moving position of the stack 10 when the stack 10 is running so that the control unit P corresponds to the moving position of the stack 10. By moving the pressing stamp 150 through the moving means 180, it is possible to pressurize the driven stack 10 for 0.1 to 10 seconds. Accordingly, it is possible to sufficiently secure the pressing time of the stacked body 10, so that the bonding quality can be further improved, and since the stacking body 10 can be transferred and pressed, the manufacturing time can be shortened and the production amount can be improved.

Thereafter, referring to FIG. 15, the control unit P stops the operation of the magnetic field generating unit 170 when the pressurization of the stacked body 10 is completed, and guides the pressurization stamp 150 coupled to the guide unit 130. It can be moved upward by the pneumatic pressure of the pneumatic actuator which is the means 130.

Thereafter, referring to FIG. 16, the control unit P may return the pressure stamp 150 to the origin in the opposite direction from the running direction S of the stacked body 10 through the moving means 180.

Hereinafter, an electrode assembly according to an embodiment of the present invention will be described.

2, an electrode assembly 10' according to an embodiment of the present invention is an electrode assembly 10' manufactured by the electrode assembly manufacturing apparatus according to the above-described embodiment and the electrode assembly manufacturing apparatus according to another embodiment. ) For.

Accordingly, in the present embodiment, contents overlapping with the electrode assembly manufacturing apparatus according to the above-described embodiment and the electrode assembly manufacturing apparatus according to the other embodiments will be omitted.

The electrode assembly 10 ′ is a power generating device capable of charging and discharging, and may be formed in a form in which the anode 11, the separators 14 and 15, and the cathode 12 are alternately stacked.

Hereinafter, a secondary battery according to an embodiment of the present invention will be described.

A secondary battery according to an embodiment of the present invention includes an electrode assembly 10' and a battery case (not shown) accommodating the electrode assembly 10'.

A secondary battery according to an embodiment of the present invention relates to a secondary battery including the electrode assembly manufacturing apparatus according to the above-described embodiment and the electrode assembly 10 ′ manufactured by the electrode assembly manufacturing apparatus according to another embodiment. Accordingly, in the present embodiment, contents overlapping with the electrode assembly manufacturing apparatus according to the above-described embodiment and the electrode assembly manufacturing apparatus according to the other embodiments will be omitted or briefly described, and the differences will be mainly described.

In more detail, the electrode assembly 10 ′ is an electrode assembly 10 ′ manufactured through the above-described electrode assembly manufacturing apparatus, and electrodes 13 and separators 14 and 15 may be alternately stacked. In this case, the anode 11, the separators 14 and 15, and the cathode 12 may be alternately stacked to be formed in a clustered form through lamination.

The battery case may have a receiving portion formed therein to accommodate the electrode assembly 10 ′. A technique for forming a secondary battery by accommodating the electrode assembly 10 ′ in a battery case is known in the art, and thus a detailed description thereof will be omitted.

Although the present invention has been described in detail through specific examples, this is for explaining the present invention in detail, and the electrode assembly manufacturing apparatus according to the present invention, and the electrode assembly and secondary battery manufactured through it are not limited thereto. It will be said that various implementations are possible by those of ordinary skill in the art within the technical spirit of the present invention.

In addition, the specific scope of protection of the invention will be made clear by the appended claims.

10: laminate
10': electrode assembly
11: anode
11a: positive electrode current collector
11b: positive electrode active material
12: cathode
12a: negative electrode current collector
12b: negative active material
13: electrode
14,15: separator
16: anode tab
17: cathode tab
18: electrode tab
100,200: electrode assembly manufacturing device
110: supply
111: electrode supply roll
111a: anode supply roll
111b: cathode supply roll
112: separation membrane supply roll
112a: first separation membrane supply roll
112b: second separation membrane supply roll
120: transfer unit
130: guide means
140,240: heating unit
141: upper heating block
142: lower heating block
150: pressurized stamp
160: flexible member
170: magnetic field generator
180: vehicle
181: motor
182: screw shaft
183: moving block
183a: screw hole
190: position detection sensor
B: Support block
C1, C2, C3 cutter
P: control unit
S: driving direction

Claims (15)

An apparatus for manufacturing an electrode assembly by laminating a stack of alternately stacked electrodes and separators,
A heating unit for applying heat to the laminate;
A pressurized stamp that pressurizes and bonds the upper portion of the laminate seated on the support block, and includes a magnetic material; And
Including a magnetic field generator for applying a magnetic field pulse to the pressure stamp,
An electrode assembly manufacturing apparatus for moving the pressure stamp to pressurize the heated laminate by applying a magnetic field pulse from the magnetic field generator to the pressure stamp. The method according to claim 1,
An electrode assembly manufacturing apparatus further comprising a flexible member provided on a side of the pressure stamp that presses the laminate. The method according to claim 2,
The flexible member is an electrode assembly manufacturing apparatus formed by coating a polymer buffer. The method of claim 3,
The flexible member is an electrode assembly manufacturing apparatus made of a PET film or urethane foam. The method according to claim 2,
The heating unit includes a heating plate,
The heating plate is an electrode assembly manufacturing apparatus positioned between the pressure stamp and the flexible member. The method according to claim 1,
The heating unit includes an upper heating block and a lower heating block for heating the upper and lower sides of the laminate, and is provided to be spaced apart from the pressure stamp by a predetermined distance,
Electrode assembly manufacturing apparatus further comprising a transfer unit for transferring the laminate heated by the heating unit to the pressure stamp side. The method according to claim 1,
An electrode assembly manufacturing apparatus wherein the magnetic field generator includes an electromagnet. The method according to claim 1,
The electrode assembly manufacturing apparatus further comprises a guide means for guiding the vertical movement of the pressure stamp is coupled to the end portion of the pressure stamp (Guinde). The method of claim 8,
The guide means is made of a pneumatic actuator,
An electrode assembly manufacturing apparatus in which the pressure stamp is moved upward by the pneumatic actuator after the action of the magnetic field pulse that moves the pressure stamp downward is released and the pressure of the laminate is completed. The method of claim 8,
Further comprising a moving means for moving the pressure stamp and the magnetic field generator to correspond to the driving position of the stack,
The moving means is an electrode assembly manufacturing apparatus including a motor that provides a driving force required for movement. The method of claim 10,
A position sensor for detecting a moving position of the stacked body; And
Including a control unit for controlling the motor operation of the moving means,
The control unit receives the position measurement value of the stacked body from the position detection sensor, and controls the motor to correspond to the moving position of the stacked body to move the pressure stamp and the magnetic field generator. The method of claim 10,
The moving means
A screw shaft rotated by the motor and positioned parallel to the traveling direction of the laminate; And
A screw hole coupled to the screw shaft is formed, and further comprising a moving block on which the magnetic field generating unit and the guide means are mounted,
When the screw shaft is rotated by the motor, the moving block is linearly moved along the screw shaft to move the magnetic field generator and the pressure stamp coupled to the guide means. The method according to claim 1,
Further comprising a supply for supplying the electrode and the separator to the pressure stamp side,
The electrode assembly manufacturing apparatus including an electrode supply roll on which the electrode is wound and a separation membrane supply roll on which the separation membrane is wound. The method according to claim 1,
An electrode assembly manufactured by the electrode assembly manufacturing apparatus according to any one of claims 1 to 13. The method according to claim 1,
A secondary battery comprising an electrode assembly manufactured by the electrode assembly manufacturing apparatus according to any one of claims 1 to 13.

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