High temperature pressurization system and method for all-solid-state secondary battery

Abstract

To provide a high-temperature pressurization system (1) and method for an all-solid-state secondary battery.SOLUTION: In providing a high-temperature pressurization system (1) and method for an all-solid-state secondary battery, a pressurization section for performing high-temperature pressurization processing to maximize the contact interface between a solid electrolyte and an active material of the all-solid-state secondary battery and minimize the interface resistance is formed along a vertical direction, so that a tact time (Tact Time) is shortened because the processing is not passed through a step of discharging a fluid from an internal space of a vessel after all steps of the processing is completed, and also, the processing efficiency is enhanced because pressurization sections are arranged at predetermined intervals.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a high-temperature pressurization system and method for all-solid-state secondary batteries. More specifically, a pressurization unit where a high-temperature pressurization process for maximizing the contact interface between the solid electrolyte and the active material of the all-solid-state secondary battery and minimizing the interface resistance is performed is formed along the vertical direction, so that the tact time is shortened because the process of discharging fluid from the internal space of the vessel after the process is not required, and a large number of pressurization units are arranged along a predetermined interval to increase the process efficiency. The present invention relates to a high-temperature pressurization system and method for all-solid-state secondary batteries.

Background Art

[0002] Recently, as the development of electric vehicles, energy storage batteries, robots, satellites, etc. has become full-scale, research on secondary batteries, which are high-performance batteries capable of repeated charging and discharging, has been actively conducted. Currently commercially available secondary batteries include nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries, lithium secondary batteries, etc. Among them, lithium secondary batteries have attracted attention due to the advantages that they hardly cause a memory effect compared to nickel-based secondary batteries, can be freely charged and discharged, have a very low self-discharge rate, and have a high energy density.

[0003] Such lithium secondary batteries mainly use lithium-based oxides and carbon materials as the positive electrode active material and the negative electrode active material, respectively. A lithium secondary battery includes an electrode assembly in which a positive electrode plate and a negative electrode plate, each coated with a positive electrode active material and a negative electrode active material, are arranged with a separator interposed therebetween, and a pouch, which is an exterior material for sealing and housing the electrode assembly together with an electrolytic solution.

[0004] Among them, the all-solid-state secondary battery is a secondary battery in which all the main materials are solid. By using a solid electrolyte, the risks of fire and explosion are significantly reduced, the scope of application is widened, and although the performance is extremely excellent, lithium metal, which could not be used due to the risks of fire and explosion, can be used as the negative electrode material, so the energy density can be dramatically increased. Due to these advantages, the development of all-solid-state secondary batteries is currently being actively carried out.

[0005] In such an all-solid-state secondary battery, since ions move between the solid lattices in the solid electrolyte, it is necessary to minimize the interfacial resistance while maximizing the contact interface between the active material and the electrolyte. For this purpose, it has been manufactured by a method of applying pressure with a hydraulic press equipment, such as after laminating the solid electrolyte layer. However, the all-solid-state secondary battery of this method has a problem that it is not suitable for mass production.

[0006] To solve such problems, the inventor of the present invention presents a novel all-solid-state secondary battery high-temperature pressurization system having an improved structure / method, the details of which will be described later.

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0008] The present invention was devised to solve the problems of the above-described prior art. The purpose is to provide an all-solid-state secondary battery high-temperature pressurization system and its method that can shorten the total process time because, by forming the pressurizing part along the vertical direction, it is not necessary to discharge the fluid in the internal space of the vessel before taking out the secondary battery from the vessel after the pressurization process.

[0009] Further, the present invention aims to provide a high-temperature pressurization system and method for all-solid-state secondary batteries that improve process efficiency by forming the pressurizing part along the vertical direction, so that it is not necessary to re-supply fluid to the internal space of the vessel before the pressurization process.

[0010] Further, the present invention aims to provide a high-temperature pressurization system and method for all-solid-state secondary batteries that increase process efficiency by arranging a large number of pressurizing parts in the pressurization space so that the high-temperature pressurization process is carried out substantially simultaneously or the processes by any pair or more of the pressurizing parts overlap in time.

[0011] Further, the present invention aims to provide a high-temperature pressurization system and method for all-solid-state secondary batteries that shorten the pressurization time by fluid by controlling the volume of the internal space of the vessel by forming a spacer on the internal space of the vessel.

[0012] Further, the present invention aims to provide a high-temperature pressurization system and method for all-solid-state secondary batteries that firmly couple the vessel and the door part by inserting a fixing pin along the horizontal direction into one side of the vessel and the door part.

[0013] Further, the present invention aims to provide a high-temperature pressurization system and method for all-solid-state secondary batteries that allow the secondary battery after the pressurization process to be taken out independently from the vessel by configuring a large number of lid parts to be independently movable up and down.

Means for Solving the Problems

[0014] In order to achieve the above object, the present invention can be realized by an embodiment having the following configuration.

[0015] According to an embodiment of the present invention, a high-temperature pressurization system for an all-solid-state secondary battery according to the present invention is formed along a vertical direction so that the all-solid-state secondary battery is inserted downward, and a pressurization unit configured to pressurize the secondary battery by a supplied fluid, a door unit configured such that one side moves up and down to cover an open side of the pressurization unit, a storage tank for storing the fluid, and a piping unit communicating with the pressurization unit and the storage tank to supply the fluid from the storage tank to the pressurization unit.

[0016] According to another embodiment of the present invention, the pressurization unit in the high-temperature pressurization system for an all-solid-state secondary battery according to the present invention is characterized in that a large number of them are arranged at intervals within a pressurization space.

[0017] According to another embodiment of the present invention, the pressurization process by a large number of pressurization units in the high-temperature pressurization system for an all-solid-state secondary battery according to the present invention is characterized in that they overlap with each other in time.

[0018] According to another embodiment of the present invention, the high-temperature pressurization system for an all-solid-state secondary battery according to the present invention further includes a door conveyance unit connected to the door unit and configured to reciprocate the door unit between the pressurization unit and a standby unit, and a standby unit where the secondary battery after the pressurization process is discharged from the pressurization unit.

[0019] According to another embodiment of the present invention, an individual pressurization unit in the high-temperature pressurization system for an all-solid-state secondary battery according to the present invention includes a vessel having an internal space extending along the vertical direction so that the secondary battery can be inserted, and an inlet hole configured to supply the fluid from the storage tank to the internal space.

[0020] According to another embodiment of the present invention, an individual inlet hole in the high-temperature pressurization system for an all-solid-state secondary battery according to the present invention is formed on the bottom surface of a corresponding vessel.

[0021] According to another embodiment of the present invention, an individual pressurizing unit in the high-temperature pressurization system for all-solid-state secondary batteries according to the present invention is formed on the inner surface of the internal space, and further includes a spacer for controlling the volume of the individual internal space.

[0022] According to another embodiment of the present invention, a plurality of door parts are provided in the high-temperature pressurization system for all-solid-state secondary batteries according to the present invention. Each individual door part includes a coupling plate whose one side is coupled to a driving means and moves up and down, and a lid part that is detachably coupled to the coupling plate and seals or opens the internal space of the vessel.

[0023] According to another embodiment of the present invention, an individual door part in the high-temperature pressurization system for all-solid-state secondary batteries according to the present invention further includes a coupling guide part that is coupled to a corresponding coupling plate and controls the corresponding coupling plate to maintain a horizontal position with respect to the ground.

[0024] According to another embodiment of the present invention, an individual door part in the high-temperature pressurization system for all-solid-state secondary batteries according to the present invention has a pair of configurations that are coupled to a corresponding coupling plate, and further includes a first contact part that moves back and forth with respect to each other. Each individual lid part includes a second contact part that is formed on the upper surface of the corresponding lid part and comes into close contact with each other by the forward movement of the corresponding first contact part.

[0025] According to another embodiment of the present invention, an individual door part in the high-temperature pressurization system for all-solid-state secondary batteries according to the present invention further includes a discharge hole that allows the air in the internal space of the vessel to be discharged when fluid is introduced into the internal space of the vessel.

[0026] According to another embodiment of the present invention, an individual pressurizing unit in the high-temperature pressurization system for all-solid-state secondary batteries according to the present invention further includes a first insertion hole drilled at a predetermined height of the vessel. Each individual door part further includes a second insertion hole drilled at a predetermined height of the lid part, and further includes a number of fixing pins that move forward and are inserted into the corresponding first insertion hole and second insertion hole.

[0027] According to another embodiment of the present invention, a high-temperature pressurization system for an all-solid-state secondary battery according to the present invention includes a plurality of pressurization parts formed along the vertical direction so that the all-solid-state secondary battery is inserted downward, and the secondary battery is high-temperature pressurized by the supplied fluid; a plurality of door parts that cover the open side of the corresponding pressurization part by descending on one side; a storage tank that stores the fluid; and a piping part that communicates with the individual pressurization parts and the storage tank and supplies the fluid from the storage tank to the individual pressurization parts.

[0028] According to an embodiment of the present invention, a high-temperature pressurization method for an all-solid-state secondary battery according to the present invention includes a step in which an individual door part descends to insert the secondary battery into the internal space of an individual vessel or cover the open side of the corresponding vessel among the vessels into which the secondary battery has been inserted; and a step in which the individual door part that has completed the pressurization process moves up and down so that the secondary battery that has completed the process is discharged from the internal space of the corresponding vessel.

[0029] According to another embodiment of the present invention, the fluid in the high-temperature pressurization method for an all-solid-state secondary battery according to the present invention is water.

[0030] According to another embodiment of the present invention, the individual door part in the high-temperature pressurization method for an all-solid-state secondary battery according to the present invention further includes a discharge hole for discharging the air in the internal space of the corresponding vessel when the fluid is introduced into the internal space of the corresponding vessel, and further includes a step of introducing the fluid from the storage tank into the internal space of the individual vessel through the piping part, and a step of discharging the air in the corresponding internal space to the outside when the fluid is introduced into the internal space of the individual vessel.

[0031] According to another embodiment of the present invention, the high-temperature pressurization method for all-solid-state secondary batteries according to the present invention includes: a step of lowering one side of an individual door part to fix a secondary battery for which a process is to be performed; a step of moving the individual door part to the pressurization part side by the door conveyance part; and a step of lowering the individual door part to put the fixed secondary battery into the internal space of a corresponding vessel.

Advantages of the Invention

[0032] The present invention has the following effects according to the above-described configuration.

[0033] In the present invention, by forming the pressurization part along the vertical direction, it is not necessary to discharge the fluid in the internal space of the vessel before taking out the secondary battery from the vessel after the pressurization process, so there is an effect of shortening the total process time.

[0034] Also, in the present invention, by forming the pressurization part along the vertical direction, it is not necessary to re-supply the fluid to the internal space of the vessel before the pressurization process, so there is an effect of improving the process efficiency.

[0035] Also, in the present invention, by arranging a large number of pressurization parts in the pressurization space, the high-temperature pressurization process is performed substantially simultaneously, or the processes by any pair or more of the pressurization parts overlap in time, so there is an effect of increasing the process efficiency.

[0036] Also, in the present invention, by forming a spacer on the internal space of the vessel, there is an effect of controlling the volume of the internal space of the vessel to shorten the pressurization time by the fluid.

[0037] Also, in the present invention, by inserting the fixing pin horizontally into one side of the vessel and the door part, there is an effect of firmly coupling the vessel and the door part.

[0038] In addition, the present invention has an effect that, since a large number of lid portions are configured to be able to move up and down independently of each other, the secondary battery that has undergone the pressurization process can be taken out independently from the vessel.

[0039] In addition, even for effects that are not explicitly mentioned here, the effects described in the following specification and their provisional effects expected by the technical features of the present invention are to be treated as described in the specification of the present invention.

Brief Description of the Drawings

[0040]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Embodiments for Carrying Out the Invention

[0041] Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. The embodiments of the present invention can be modified into various forms, and the scope of the present invention should not be construed as being limited to these embodiments, but should be construed based on the matters described in the claims. In addition, the present embodiment is merely provided as a reference for more fully explaining the present invention to those having ordinary knowledge in the art.

[0042] As used herein, the singular form can include the plural form unless the context clearly dictates otherwise. Also, as used herein, "comprise" and / or "comprising" identify the presence of the recited shape, number, step, operation, member, element, and / or group thereof, and do not exclude the presence or addition of one or more other shapes, numbers, operations, members, elements, and / or groups.

[0043] Hereinafter, when it is described that a certain component (or layer) is disposed on another component (or layer), it should be noted that the certain component may be directly disposed on the other component, or another component or layer may be interposed between the components. Also, when a certain component is expressed as being directly disposed on another component, no other component is located between the components. Also, the terms "on", "upper", "lower", "upper side", "lower side", "one side", or "side surface" of a certain component mean relative positional relationships.

[0044] Hereinafter, when it is described that one component is "connected" to another component, this is understood to be a concept that includes not only that both components are directly connected but also that they are connected by a third component.

[0045] FIG. 1 is a conceptual diagram of a high-temperature pressurization system for an all-solid-state secondary battery according to an embodiment of the present invention.

[0046] Hereinafter, with reference to the accompanying drawings, a high-temperature pressurization system 1 for an all-solid-state secondary battery according to an embodiment of the present invention will be described in detail.

[0047] Referring to FIG. 1, the present invention relates to a high-temperature pressurization system 1 for an all-solid-state secondary battery. More specifically, a pressurization unit in which a high-temperature pressurization process for maximizing the contact interface between the solid electrolyte and the active material of the all-solid-state secondary battery and minimizing the interface resistance is performed is formed along the vertical direction, so that after the process is completed, the fluid does not go through the process of being discharged from the internal space of the vessel, thereby shortening the tact time, and a high-temperature pressurization system 1 for an all-solid-state secondary battery in which a large number of pressurization units are arranged along a predetermined interval to increase the process efficiency.

[0048] The above term "fluid" refers to a pressure transmission medium stored in a storage tank 60 described later and introduced into the internal space 110a of the pressurization unit 10, and is preferably a liquid. Further, the "fluid" is more preferably, for example, an oily heat transfer oil and / or water, but it should be noted that the scope of the present invention is not limited by the above examples.

[0049] Also, the above term "vertical direction" is preferably understood to be a direction orthogonal to the ground. By forming the pressurization unit 10 along the vertical direction, an opening 111a described later is orthogonal to the ground, and a cassette 3 containing the all-solid-state secondary battery can be inserted downward into the internal space 110a of the pressurization unit 10 and discharged upward. A detailed description of this will be given later.

[0050] In addition, the all-solid-state secondary battery in which the high-temperature pressurization process is performed by the pressurization unit 10 may be directly inserted into the cassette 3, or may be inserted into the cassette 3 after being packed in a separate airtight part (not shown), but the latter is preferable. The airtight part is preferably configured to be formed of a material having a high elongation characteristic on at least one side so as to prevent the all-solid-state secondary battery from coming into direct contact with the fluid and to transmit the pressure of the fluid to the secondary battery located inside.

[0051] Also, as described above and as will be described later, one or more secondary batteries can be housed in the cassette 3 and inserted into the pressurization unit 10, but it should be noted that the secondary battery does not necessarily have to be housed in the cassette 3. For example, the secondary battery may be packed in the airtight part and directly inserted into the pressurization unit 10, or may be housed in a separate configuration for housing secondary batteries other than the cassette 3 and then inserted into the pressurization unit 10. The scope of the present invention is not limited by specific examples.

[0052] The all-solid-state secondary battery high-temperature pressurization system 1 according to an embodiment of the present invention may include a pressurization unit 10, a door unit 20, a door conveyance unit 30, a locking unit 40, a standby unit 50, a storage tank 60, and a piping unit 70. In FIG. 1, one end of the piping unit 70 is shown as being connected to the storage tank 60 and the other end of the piping unit 70 is shown as being cut off, but it should be noted that the other end of the individual piping unit 70 is connected to the corresponding pressurization unit 10. Also, it should be noted that the door conveyance unit 30 and the standby unit 50 are not essential components of the present invention.

[0053] FIG. 2 is a schematic perspective view of the pressurization unit and the lid unit, FIG. 3 is a vertical cross-sectional view of the pressurization unit with the cassette inserted according to FIG. 1, and FIG. 4 is a cross-sectional view for explaining the coupling relationship between the pressurization unit and the door unit according to FIG. 1.

[0054] Referring to FIGS. 1 to 4, the pressurizing unit 10 is configured such that the cassette 3 containing the all-solid-state secondary battery is inserted into its internal space 110a, and the secondary battery is subjected to high-temperature pressurization by the supplied fluid. Such pressurizing units 10 may be arranged in a plurality, spaced apart from each other within the pressurization space. As an example, the pressurizing units 10 may be arranged along a number of rows and / or a number of columns within the pressurization space. For example, as shown in FIG. 1, the pressurizing units 10 can be arranged along two rows, seven by seven and spaced apart from each other for each row, but the scope of the present invention is not limited thereto.

[0055] Generally, the high-temperature pressurization process for a single all-solid-state secondary battery is performed for a long time (for example, about 40 minutes to 60 minutes). However, by arranging a number of pressurizing units 10 as in an embodiment of the present invention, the high-temperature pressurization process for the secondary batteries housed in a number of cassettes C can be performed substantially simultaneously, or at least such that the process times for some of the secondary batteries overlap, thereby significantly shortening the total process time. That is, in an embodiment of the present invention, the pressurization processes for the secondary batteries in the cassettes 3 corresponding to the individual pressurizing units 10 may be performed substantially simultaneously, or only the pressurization processes for the secondary batteries in the cassettes 3 corresponding to some of the pressurizing units 10 may be performed substantially simultaneously, or the pressurization processes for the secondary batteries in the cassettes 3 corresponding to the individual pressurizing units 10 may be performed independently in terms of time, or the pressurization processes performed through at least some of the pressurizing units 10 may be performed such that they overlap in time, and there is no separate limitation thereto. In some cases, the pressurization processes for the individual pressurizing units 10 may be performed in chronological order. The above-mentioned "high-temperature pressurization process" or "pressurization process" is understood to mean the process from the time when the cassette C containing the secondary battery in the individual pressurizing unit 10 is inserted until the cassette C is discharged from the pressurizing unit 10. Also, the above term "overlap in time" is understood to mean a state in which the pressurization processes through at least some of the pressurizing units 10 are being performed together at any given time. For example, when the cassette C in one pressurizing unit 10 is inserted at any given time and the secondary battery is pressurized by the fluid in another pressurizing unit 10, the high-temperature pressurization processes by both pressurizing units 10 overlap in time.

[0056] Further, the pressing unit 10 is preferably arranged along the direction perpendicular to the ground, such that the cassette 3 is inserted from above downward (see FIG. 2), and discharged upward from its internal space 110a.

[0057] For this purpose, the pressing unit 10 may include a vessel 110, a tension wire 120, an insertion hole 130, a spacer 140, and a first insertion hole 150.

[0058] Referring to FIGS. 2 and 3, the vessel 110 forms the outer shape of the pressing unit 10 and has an internal space 110a into which the cassette 3 is inserted or introduced. The vessel 110 preferably has a structure with its lower part sealed except for the insertion hole 130 to be described later. The internal space 110a may be formed to be recessed downward from a predetermined height of the vessel 110, such that the cassette 3 is inserted or introduced from below. That is, the upper side of the internal space 110a is open. Thereby, after the completion of the high-temperature pressing process, the cassette 3 can be easily taken out from the internal space 110a without discharging the fluid from the internal space 110a of the vessel 110.

[0059] In contrast, problems in the case where the internal space 110a is formed in the horizontal direction will be described.

[0060] When the door unit 20 to be described later moves backward along the horizontal direction with at least one side portion of the internal space 110a being open, the fluid filling the internal space 110a is automatically discharged to the outside of the vessel 110 through the opening 111a of the internal space 110a. In order to prevent such a situation, there arises a problem that the fluid supplied into the internal space 110a of the vessel 110 must be discharged in advance from the internal space 110a before the backward movement of the door unit 20.

[0061] Also, when the high-temperature pressurization process is performed again, since the fluid in the internal space 110a has been discharged, the step of re-supplying the fluid to the internal space 110a is the only option. That is, time is required to discharge the entire fluid and time is required to re-supply the fluid to the internal space 110a, which can be a major factor in reducing the overall process efficiency.

[0062] Also, the internal space 110a may be a space into which fluid is supplied through the inlet hole 130 during the high-temperature pressurization process. For this purpose, the internal space 110a can communicate with the storage tank 60 and / or the pipe section 70 through the inlet hole 130. And the internal space 110a can also communicate with the discharge hole 230 of the door section 20 described later. Also, the internal space 110a can be formed in a cylindrical structure as an example, but the present invention is not limited to this.

[0063] Also, an insertion part 110b can be further formed on the internal space 110a of the vessel 110. The insertion part 110b communicates with the opening 111a of the internal space 110a and is configured to have a larger left-right width size or diameter size than the opening 111a, and can be formed in a cylindrical structure as an example. One side of the door section 20 described later can be inserted into such an insertion part 110b so as to contact the step side on the boundary side between the insertion part 110b and the internal space 110a. Also, a heat transfer part such as a heating block (not shown) for maintaining the temperature of the supplied fluid may be formed on one side of the vessel 110, but the scope of the present invention is not limited to this.

[0064] Referring to FIG. 3, the tension wire 120 is a wire configuration wound around the outer surface of the vessel 110 and can be wound to a thickness equal to or greater than a certain level so as to compress the vessel 110. Thus, when fluid is supplied to the internal space 110a of the vessel 110, an internal pressure is generated in the internal space 110a. At this time, the tension wire 120 can control the internal pressure generated laterally. Further, the internal pressure generated in the vertical direction can be controlled by a locking unit 40 described later, and a detailed description thereof will be given later. In another embodiment of the present invention, it should be noted that instead of utilizing the tension wire 120 wound around the outer surface of the vessel 110, the vessel 110 may be formed as a monoblock type so as to withstand an internal pressure within a predetermined range.

[0065] The input hole 130 is a through-hole configuration that allows fluid from the storage tank 60 to be supplied to the internal space 110a of the vessel 110 when the valve 710 is opened. Such an input hole 130 can be connected to a piping unit 70 described later. When the valve 710 of the piping unit 70 is opened, fluid is supplied to the internal space 110a through the input hole 130, and when the valve 710 is closed / shut off, the supply of the fluid can be interrupted. Further, the input hole 130 can be formed at any position of the vessel 110. Considering that the upper surface of the vessel 110 is covered by the door unit 20 before and after the pressurization process and the tension wire 120 is wound around the side surface thereof, it is preferably formed at the bottom surface of the vessel 110.

[0066] The spacer 140 is formed on the inner surface or inner circumferential surface of the internal space 110a of the vessel 110, and is configured such that the cassette 3 can be inserted or inserted therein. By reducing the volume of the internal space 110a of the vessel 110 to a desired level via such a spacer 140, the pressurization time by the fluid during the high-temperature pressurization process can be shortened. For example, the internal space 110a of the vessel 110 may be formed in a cylindrical shape, and the cassette 3 may be formed in a substantially rectangular parallelepiped shape. Therefore, a dead space is inevitably generated when the cassette 3 is inserted into the internal space 110a, and the spacer 140 can be utilized to remove this dead space.

[0067] Therefore, it is preferable that the spacer 140 has a shape corresponding to the internal space 110a on its outer surface and a shape corresponding to the outer surface of the cassette 3 on the side where the cassette 3 is inserted so as to be inserted into the internal space 110a of the vessel 110. It should also be noted that the spacer 140 is not an essential component of the present invention.

[0068] Referring to FIG. 2, the first insertion hole 150 is formed at a predetermined height of the vessel 110 and is configured such that one side of the locking portion 40 described later can be inserted therein. More specifically, after the first insertion hole 150 and the second insertion hole 240 of the door portion 20 are matched with each other, the fixing pin 410 advances and is inserted into the insertion holes 150 and 240, so that the vessel 110 and the door portion 20 can be coupled to each other. Therefore, as an example, the first insertion hole 150 is preferably formed to communicate with the insertion portion 110b at the height where the insertion portion 110b is formed. Further, the first insertion hole 150 may be formed substantially along the horizontal direction together with the second insertion hole 240.

[0069] Referring to FIGS. 2 to 4, the door part 20 is configured to move up and down and covers the upper side of the internal space 110a of the vessel 110. As an example, the bottom of the door part 20 can be inserted into the internal space 110a and the insertion part 110b so that the internal space 110a of the vessel 110 can be sealed. At this time, one side of the door part 20 may be connected to a driving means such as a hydraulic cylinder, a pneumatic cylinder (not shown), or a driving motor to move up and down, but the scope of the present invention is not limited thereto. Also, a separate packing structure (not shown) for preventing fluid leakage may be formed at the coupling part between the door part 20 and the pressurizing part 10. Further, the door part 20 can correspond to a configuration in which the cassette 3 is coupled on the bottom to substantially convey the cassette 3.

[0070] Such a door part 20 can include a coupling part 210, a lid part 220, a discharge hole 230, and a second insertion hole 240.

[0071] One side of the coupling part 210 is coupled to the lid part 220 and is configured to reciprocate between the pressurizing part 10 and the standby part 50 by the door conveying part 30. As an embodiment, the other side of the coupling part 210 may be configured to move up and down together with the lid part 220.

[0072] For this purpose, the coupling part 210 can include a coupling plate 211, a first contact part 213, a coupling guide part 215, and a fixing plate 217.

[0073] Referring to FIG. 4, the coupling plate 211 has a plate-like configuration in which one side is coupled to the driving means and moves up and down. As an example, the upper surface of the coupling plate 211 may be configured to move up and down by a shaft configuration connected to the driving motor.

[0074] The first contact part 213 is a pair of components that couple with the coupling plate 211, and is configured to move forward adjacent to each other or move backward away from each other. Such a first contact part 213 is configured to contact the second contact part 221 of the lid part 220 described later so that the lid part 220 is coupled to the coupling part 210. For this purpose, each individual first contact part 213 may include a downward extension part 2131 that extends downward from the bottom surface of the coupling plate 211, preferably extending vertically, and a bent part 2133 that is bent in a direction facing each other from the bottom of the downward extension part 2131, preferably extending horizontally. That is, each individual first contact part 213 can be formed in an "L" shape. At this time, the downward extension part 2131 is coupled to the coupling plate 211, but can be designed to be movable back and forth by any known configuration. A pair of first contact parts 213 facing each other can be formed in large numbers on one side of the coupling plate 211, and it is preferable that the number is formed in a one-to-one correspondence with the lid part 220, but the scope of the present invention is not limited thereto.

[0075] The coupling guide part 215 is configured such that its upper end is fixed to the fixed plate 217 and its lower end is coupled to the coupling plate 211 to control the coupling plate 211 to remain horizontal with respect to the ground. Such coupling guide parts 215 may be formed in large numbers spaced apart from each other, and there is no separate limitation on the number. By making the coupling plate 211 and the lid part 220 remain horizontal by such coupling guide parts 215, the lid part 220 can be easily inserted into the internal space 110a of the vessel 110. Further, the coupling guide part 215 may be, for example, in the shape of a cylindrical rod, but there is no separate limitation thereto.

[0076] The fixed plate 217 is formed above the coupling plate 211, configured such that the coupling guide portion 215 couples thereto, and has a configuration through which a shaft connected to the driving means penetrates. Such a fixed plate 217 is preferably fixed along the vertical direction and, for example, has a plate-like configuration. Also, the fixed plate 217 is preferably formed as one unit as a whole, but the scope of the present invention is not limited thereto.

[0077] The lid portion 220 is configured to be able to move up and down by coupling with the coupling portion 210, and is configured to seal or open the internal space 110a of the vessel 110. Such a lid portion 220 can include, for example, an upper portion 220a inserted into the insertion portion 110b and a lower portion 220b inserted on the side of the opening 111a of the internal space 110a. The upper portion 220a has a shape corresponding to the insertion portion 110b, and the lower portion 220b has a shape corresponding to the opening 111a or the internal space 110a. Thus, the upper portion 220a can have a larger diameter size or left-right width size than the lower portion 220b. The upper portion 220a and the lower portion 220b can have, for example, a cylindrical structure, but the scope of the present invention is not limited thereto.

[0078] Also, one side of the lid portion 220, preferably the bottom surface of the lower portion 220b, can be configured such that the cassette 3 is fixed and coupled thereto. As an example, the cassette 3 may be configured to be slidably coupled to one side of the lid portion 220. Thus, when the lid portion 220 descends, the cassette 3 is inserted into the internal space 110a of the vessel 110, and after the completion of the high-temperature pressurization process, the cassette 3 can be conveyed to the standby portion 50 side by the up-and-down movement and horizontal movement of the lid portion 220. The fixing / coupling between the lid portion 220 and the cassette 3 can also be performed through any known structure other than a slide coupling. However, in some cases, the lid portion 220 may simply perform the function of covering the pressurizing portion 10.

[0079] Such a lid portion 220 can include a second contact portion 221.

[0080] Referring to FIGS. 2 and 4, the second contact portion 221 is formed on one side of the lid portion 220, preferably on the upper surface of the lid portion 220, and is configured such that the lid portion 220 is fixed to the coupling portion 210 by contact with the first contact portion 213. For this purpose, the second contact portion 221 can include a head portion 2211 extending in the horizontal direction and a body portion 2213 extending from the bottom surface of the head portion 2211 to the upper surface of the lid portion 220. At this time, the head portion 2211 preferably has a larger left-right width size than the body portion 2213. Therefore, when the pair of first contact portions 213 move forward and the first contact portion 213 and the second contact portion 221 are in close contact with each other, the lid portion 220 can be coupled and fixed to the coupling portion 210. However, it should be noted that the fixing of the coupling portion 210 and the lid portion 220 is not necessarily performed only by the structures of the first contact portion 213 and the second contact portion 221, and may be performed by another known structure. Also, different from what is shown in FIG. 2, the second contact portion 211 may be formed in a rectangular plate shape instead of a cylindrical shape as a whole. At this time, the first contact portion 213 may also be formed in a corresponding shape.

[0081] As described above, the second contact portion 221 is formed on one side of each individual lid portion 220, and a number of first contact portions 213 are formed on the single coupling plate 211. Therefore, in one embodiment of the present invention, not only can the high-temperature pressurization process by a number of pressurizing portions 210 be performed substantially simultaneously, but also the start / end points of the process by each individual pressurizing portion 210 can be made different. That is, the cassette 3 fixed to each individual lid portion 220 can be independently inserted into the corresponding pressurizing portion 10, and the processed individual cassette 3 can be discharged from the corresponding pressurizing portion 10.

[0082] Referring to FIG. 3, the discharge hole 230 is a flow path configuration that allows the air in the internal space 110a to be discharged to the outside when supplying fluid to the internal space 110a for the high-temperature pressurization process. Such a discharge hole 230 is preferably formed on the lid portion 220 side. Regarding the air discharge through the discharge hole 230 in detail, during the process of supplying fluid to the internal space 110a of the vessel 110, air is discharged to the outside through the discharge hole 230. Then, when the fluid is discharged through the discharge hole 230, a valve (not shown) is closed or blocked.

[0083] Referring to FIG. 2, the second insertion hole 240 is formed at a predetermined height of the lid portion 220 and is configured to allow the locking portion 40 to be inserted. The second insertion hole 240 is preferably formed in a structure that penetrates the upper side portion 220a of the lid portion 220, and its details are replaced by the description content of the first insertion hole 150.

[0084] Referring to FIG. 1, the door transfer unit 30 is connected to one side of the door unit 20 and is configured to allow the door unit 20 to reciprocate between the pressurizing unit 10 and the standby unit 50. Such a door transfer unit 30 may be connected to the fixed plate 217 or may be connected to an arbitrary position of the door unit 20, but the former is preferred. Also, the door transfer unit 30 can include any known configuration such as a hydraulic cylinder, a pneumatic cylinder, or a drive motor to allow the door unit 20 to be transferred, and the present invention is not limited by specific examples. By the door transfer unit 30, the door unit 20 can reciprocate in the horizontal direction.

[0085] Referring to FIGS. 1 to 4, the locking portion 40 is configured to be inserted into one side of the pressurizing unit 10 and the door unit 20 by moving forward and / or backward, so that the door unit 20 is mutually coupled and fixed in a state of covering the pressurizing unit 10. The locking portion 40 can be formed in the same number as the corresponding individual pressurizing units 10.

[0086] For this purpose, the locking portion 40 can include a fixing pin 410.

[0087] The fixed pin 410 is of a pin type extending in the horizontal direction and is configured to be inserted into or removed from the first insertion hole 150 and the second insertion hole 240 by a forward and backward movement. The fixed pin 410 may have a cylindrical configuration corresponding to the first insertion hole 150 and the second insertion hole 240, but there is no separate limitation thereto. Further, the fixed pin 410 can be configured to be connected to any known moving means such as a hydraulic cylinder, a pneumatic cylinder, or a drive motor and move forward and / or backward. With such a fixed pin 410, the internal pressure generated upward by the fluid supplied to the internal space 110a can be controlled.

[0088] However, in the embodiment of the present invention, covering the upper surface and, if necessary, the bottom surface of the pressurizing unit 10 is not limited by the configuration of the locking unit 40. As another example, it should be noted that the upper surface and, if necessary, the bottom surface of the pressurizing unit 10 may be sealed by a yoke frame or the like. As another example, the upper surface of the pressurizing unit 10 can be sealed using any known configuration or a configuration to be known, such as a C-clamp type or a Threaded Closing type, and it should be noted that the scope of the present invention is not limited by specific exemplifications.

[0089] Referring to FIG. 1, the standby unit 50 is configured such that a cassette 3 containing a secondary battery that has completed the pressurizing process is mounted at a predetermined distance from the pressurizing unit 10. Such a standby unit 50 may correspond to the side where the cassette 3 is inserted for the pressurizing process. That is, in some cases, the standby unit 50 can perform both the functions of the insertion unit and the discharge unit.

[0090] The storage tank 60 is configured to supply a fluid, which is a pressure transmission medium, to the pressurizing unit 10 while storing it. Such a storage tank 60 can communicate with the input hole 130 of an individual pressurizing unit 10 through a piping unit 70. At this time, the storage tank 60 can have a heating block 610 formed on one side in order to supply a high-temperature fluid. Generally, in a solid-state secondary battery for all-solid-state, since ions move between solid lattices in the solid electrolyte, it is necessary to minimize the interface resistance while maximizing the contact interface between the active material and the electrolyte, and thus a high-temperature / high-pressure pressurizing process must be performed. For this purpose, it is preferable that the storage tank 60 is provided with a heating block 610 so that a fluid is supplied to the pressurizing unit 10 in a high-temperature state. Also, one or a plurality of storage tanks 60 may be formed, and there is no particular limitation thereto.

[0091] One end of the piping unit 70 is connected to the pressurizing unit 10 and the other end is connected to the storage tank 60, and it has a flow path configuration for supplying a fluid to the pressurizing unit 10. Also, a valve 710 can be formed on one side of the piping unit 70. The valve 710 is configured as a check valve as an example, and can determine the supply of a fluid to the pressurizing unit 10 by an opening or closing operation. And the piping unit 70 can be configured such that a fluid is easily supplied to the pressurizing unit 10 by the operation of a pump (not shown).

[0092] Figures 5 to 8 are reference diagrams for explaining a high-temperature pressurizing method for a solid-state secondary battery according to an embodiment of the present invention.

[0093] Hereinafter, with reference to the accompanying drawings, a high-temperature pressurizing method for a solid-state secondary battery according to an embodiment of the present invention will be described in detail. The high-temperature pressurizing method for a solid-state secondary battery described below can be performed by the above-described high-temperature pressurizing system 1, so detailed descriptions of overlapping contents will be omitted. Also, although it is shown on the drawing that the pressurizing processes by a large number of pressurizing units are performed simultaneously, this is only for convenience of explanation, and it should be noted that the pressurizing processes by at least some of the pressurizing units do not have to be performed simultaneously.

[0094] First, referring to FIG. 5, a cassette 3 with a secondary battery or an airtight portion placed inside is located on a standby unit 50. At this time, a single cassette 3 or a plurality of cassettes 3 may be located on the standby unit 50.

[0095] Also, referring to FIG. 6, after one side of the door unit 20 descends and is coupled to the cassette 3, it can ascend and move to the pressurizing unit 10 side. At this time, the coupling of the cassette 3 may be performed by an operator or by a separate automatic device such as a robotic arm, and there is no particular limitation thereto. To explain this step in detail, the coupling plate 211 and the lid portion 220 coupled to the coupling plate 211 both descend by the driving of the driving means. At this time, the first contact portion 213 and the second contact portion 221 are in a close contact state. Then, after coupling the cassette 3 to the lid portion 220, the coupling plate 211 and the lid portion 220 both ascend and descend by the driving of the driving means. Thereafter, the door unit 20 can be moved above the pressurizing unit 10 by the door transport unit 30. As described above, it should be noted that in the present invention, the door unit 20 does not necessarily have to be coupled to the cassette 3, and the secondary battery may be directly inserted into the pressurizing unit 10.

[0096] Thereafter, referring to FIG. 7, the door unit 20 descends and the cassette 3 is inserted into the inner space 110a of the vessel 110, and the lid portion 220 can be inserted into the opening 111a and the insertion portion 110b of the inner space 110a. At this time, the descent of the door unit 20 can be performed by the descent of the coupling plate 211 and the lid portion 220 by the driving of the driving means. Thereby, the inner space 110a of the vessel 110 can be completely sealed (see FIG. 4). At this time, the fixing pin 410 can advance and be inserted into the first insertion hole 150 and the second insertion hole 240. Thereby, the vessel 110 and the door unit 20 can be coupled to each other. When the door pin 410 is inserted, the first contact portion 213 can retract and end the close contact with the second contact portion 221.

[0097] Thereafter, the valve 710 is opened to supply a high-temperature fluid from the storage tank 60 into the internal space 110a of the vessel 110 through the pipe section 70. Subsequently, a high-temperature pressurization process for the all-solid-state secondary battery can be performed for a predetermined time.

[0098] As described above, in one embodiment of the present invention, the pressurization processes for the secondary batteries in the cassettes 3 corresponding to the individual pressurizing units 10 may be performed substantially simultaneously, or only the pressurization processes for the secondary batteries in the cassettes 3 corresponding to some of the pressurizing units 10 may be performed substantially simultaneously. The pressurization processes for the secondary batteries in the cassettes 3 corresponding to the individual pressurizing units 10 may be performed independently in terms of time, or the pressurization processes proceeding through at least some of the pressurizing units 10 may be performed so as to overlap in time, and there is no particular limitation thereto.

[0099] Referring to FIG. 8, when there is a pressurizing unit 10 that has completed the high-temperature pressurization process, the fixing pin 410 corresponding to the pressurizing unit 10 retracts and is disengaged from insertion into the first insertion hole 150 and the second insertion hole 240. At this time, the first contact portion 213 and the second contact portion 221 corresponding to the pressurizing unit 10 can be brought into close contact. Thereafter, the door portion 20 moves up and down so that the cassette 3 containing the processed secondary battery can be taken out from the internal space 110a of the vessel 110. Alternatively, after the door portion 20 moves up and down, the secondary battery may be taken out from the pressurizing unit 10 by a separate operation.

[0100] Also, by the operation of the door conveyance unit 30, the door portion 20 coupled to the cassette 3 containing the processed secondary battery can move to the standby unit 50 side.

[0101] The above detailed description is illustrative of the present invention. Also, the foregoing content describes the preferred embodiments of the present invention, and the present invention can be used in various different combinations, modifications, and environments. That is, changes and modifications are possible within the scope of the concept of the invention disclosed herein, the scope equivalent to the described disclosure, and / or the scope of technology or knowledge in the art. The foregoing embodiments describe the best state for realizing the technical idea of the present invention, and various changes required in the specific application fields and uses of the present invention are also possible. Therefore, the above detailed description of the invention is not intended to limit the present invention to the disclosed embodiments.

Explanation of Reference Numerals

[0102] 1 High-temperature pressurization system for all-solid-state secondary battery 10 Pressurizing section 110 Vessel 110a Internal space 111a Opening 110b Insertion section 120 Tension wire 130 Inlet hole 140 Spacer 150 First insertion hole 20 Door section 210 Coupling section 211 Coupling plate 213 First contact section 2131 Lower extension 2133 Bending section 215 Coupling guide section 217 Fixed plate 220 Lid section 220a Upper section 220b Lower section 221 Second contact section 2211 Head section 2213 Body section 230 Discharge hole 240 Second insertion hole 30 Door conveyance section 40 Locking section 410 Fixed pin 50 Standby section 60 Storage tank 610 Heating block 70 Piping section 710 Valve 3 Cassette

Claims

1. A pressurizing section formed along the vertical direction so that a secondary battery for all-solid state is inserted downward, and the secondary battery is pressurized by the supplied fluid; A door section configured such that one side moves up and down and covers the open side of the pressurizing section; A storage tank for storing the fluid; A piping section that communicates with the pressurizing section and the storage tank and supplies fluid from the storage tank to the pressurizing section, characterized in that it includes a high-temperature pressurization system for a secondary battery for all-solid state.

2. The high-temperature pressurization system for a secondary battery for all-solid state according to claim 1, wherein a plurality of the pressurizing sections are arranged separately from each other within a pressurizing space.

3. The high-temperature pressurization system for a secondary battery for all-solid state according to claim 2, wherein the pressurization steps by a plurality of pressurizing sections overlap each other in time.

4. A door conveyance section connected to the door section and configured such that the door section reciprocates between the pressurizing section and a standby section; The high-temperature pressurization system for a secondary battery for all-solid state according to claim 1, further comprising a standby section from which the secondary battery that has completed the pressurization process is discharged from the pressurizing section.

5. An individual pressurizing section A vessel having an internal space extending along the vertical direction so that a secondary battery can be inserted; An inlet hole through which the fluid from the storage tank is supplied to the internal space, characterized in that it includes a high-temperature pressurization system for a secondary battery for all-solid state according to claim 2.

6. The high-temperature pressurization system for a secondary battery for all-solid state according to claim 5, wherein the individual inlet holes are formed on the bottom surface of the corresponding vessel.

7. An individual pressurizing section The high-temperature pressurization system for a secondary battery for all-solid state according to claim 5, further comprising a spacer formed on the inner surface of the internal space and controlling the volume of the individual internal space.

8. A plurality of the door sections are formed, An individual door section A coupling plate whose one side is coupled to a driving means and moves up and down; The high-temperature pressurization system for a secondary battery for all-solid state according to claim 5, further comprising a lid section that is releasably coupled to the coupling plate and seals or opens the internal space of the vessel.

9. An individual door section The high-temperature pressurization system for a secondary battery for all-solid state according to claim 8, further comprising a coupling guide section that is coupled to the corresponding coupling plate and controls the corresponding coupling plate to maintain a horizontal position with respect to the ground.

10. An individual door section A pair of configurations that are coupled to corresponding coupling plates, further including first contact portions that move forward and backward with respect to each other. The individual lid portions Are formed on the upper surface of the corresponding lid portion and include second contact portions that come into close contact with each other by the forward movement of the corresponding first contact portion. The all-solid-state secondary battery high-temperature pressurization system according to claim 8.

11. The individual door portions When fluid is introduced into the internal space of the vessel, further include a discharge hole for discharging the air in the internal space of the vessel. The all-solid-state secondary battery high-temperature pressurization system according to claim 8.

12. The individual pressurizing portions Further include a first insertion hole formed at a predetermined height of the vessel. The individual door portions Further include a second insertion hole formed at a predetermined height of the lid portion. Further include a number of fixing pins that move forward and are inserted into the corresponding first insertion hole and second insertion hole. The all-solid-state secondary battery high-temperature pressurization system according to claim 8.

13. A number of pressurizing portions are formed along the vertical direction so that the all-solid-state secondary battery is inserted downward, and the secondary battery is high-temperature pressurized by the supplied fluid. A number of door portions that cover the open side of the corresponding pressurizing portion by the lowering of one side. A storage tank for storing the fluid. A piping portion that communicates with the individual pressurizing portions and the storage tank and supplies fluid from the storage tank to the individual pressurizing portions. The all-solid-state secondary battery high-temperature pressurization system.

14. An all-solid-state secondary battery high-temperature pressurization method using the all-solid-state secondary battery high-temperature pressurization system according to claim 8. The step of lowering the individual door portions to insert the individual secondary batteries into the internal space of the corresponding vessel or covering the open side of the corresponding vessel among the vessels into which the individual secondary batteries have been inserted. The step of raising and lowering the individual door portions that have completed the pressurization process so that the secondary batteries that have completed the process are discharged from the internal space of the corresponding vessel. The all-solid-state secondary battery high-temperature pressurization method.

15. The fluid is water. The all-solid-state secondary battery high-temperature pressurization method according to claim 14.

16. The individual door portions When fluid is introduced into the internal space of the corresponding vessel, further include a discharge hole for discharging the air in the internal space of the corresponding vessel. The step of introducing fluid into the internal space of the individual vessel from the storage tank through the piping portion. When injecting fluid into the internal space of an individual vessel, further comprising the step of allowing the air in the corresponding internal space to be discharged to the outside, the all-solid-state secondary battery high-temperature pressurization method according to claim 14, characterized in that it further comprises this step.

17. One side of an individual door portion descends to fix the secondary battery for which the process is to be performed. The step of moving an individual door portion to the corresponding pressurizing portion side by a door conveyance portion. The step of dropping an individual door portion and inserting the fixed secondary battery into the internal space of the corresponding vessel, the all-solid-state secondary battery high-temperature pressurization method according to claim 14, characterized in that it further comprises this step.

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