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

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 a secondary battery for all-solid-state use. 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 secondary battery for all-solid-state use and minimizing the interface resistance is performed is formed along the vertical direction. By doing so, since the process of discharging the fluid from the internal space of the vessel is not experienced after the completion of the process, the tact time is shortened, and a high-temperature pressurization system and method for a secondary battery for all-solid-state use are provided, in which a large number of pressurization units are arranged along a predetermined interval to increase the process efficiency. 【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 a lithium secondary battery mainly uses a lithium-based oxide and a carbon material as the positive electrode active material and the negative electrode active material, respectively. The 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 these, all-solid-state secondary batteries are secondary batteries in which all main materials are solid. By using a solid electrolyte, the risk of fire and explosion is significantly reduced, expanding the range of applications. Furthermore, lithium metal, which has significantly superior performance but could not be used due to the risk of fire and explosion, can be used as a negative electrode material, dramatically increasing energy density. Due to these advantages, development of all-solid-state secondary batteries is currently thriving. 【0005】 In all-solid-state secondary batteries, the solid electrolyte must minimize interfacial resistance while maximizing the contact interface between the active material and the electrolyte, as ions move between the solid lattice. For this reason, these batteries have been manufactured by applying pressure using a hydraulic press after stacking the solid electrolyte layers. However, all-solid-state secondary batteries produced using this method have the problem of not being suitable for mass production. 【0006】 To solve these problems, the inventors of the present invention present a novel high-temperature pressurized all-solid-state secondary battery system having an improved structure / method, the details of which will be described later. [Prior art documents] [Patent Documents] 【0007】 [Patent Document 1] Korean Published Patent No. 10-2015-0069523, "All-Solid-State Secondary Battery and Method for Manufacturing an All-Solid-State Secondary Battery" [Overview of the project] [Problems that the invention aims to solve] 【0008】 The present invention was devised to solve the problems of the prior art described above, and its purpose is to provide a high-temperature pressurization system and method for all-solid-state secondary batteries that enables a reduction in the total process time, because the pressurizing section is formed along the vertical direction, eliminating the need to discharge the fluid from the internal space of the vessel before removing the secondary battery from the vessel after the pressurizing process. 【0009】 Furthermore, the present invention aims to provide a high-temperature pressurization system and method for all-solid-state secondary batteries, which improves process efficiency by eliminating the need to resupply fluid to the internal space of the vessel before the pressurization process, as the pressurizing section is formed along the vertical direction. 【0010】 Furthermore, the present invention aims to provide a high-temperature pressurization system and method for all-solid-state secondary batteries, which improves process efficiency by ensuring that a large number of pressurizing sections are spaced apart within the pressurized space, thereby allowing the high-temperature pressurization process to be carried out substantially simultaneously, or by having any pair or more pressurizing sections overlap in time. 【0011】 Furthermore, the present invention aims to provide a high-temperature pressurization system and method for all-solid-state secondary batteries that shortens the pressurization time by fluid by controlling the volume of the internal space of a vessel by forming a spacer on the internal space of the vessel. 【0012】 Furthermore, the present invention aims to provide a high-temperature pressurized system and method for a solid-state secondary battery, wherein a fixing pin is inserted horizontally along one side of the vessel and door portion, thereby ensuring a firm connection between the vessel and door portion. 【0013】 Furthermore, the present invention aims to provide a high-temperature pressurization system and method for all-solid-state secondary batteries, wherein a number of lids are configured to be able to move up and down independently of each other, so that the pressurized secondary battery can be removed independently from the vessel. [Means for solving the problem] 【0014】 To achieve the above objectives, the present invention can be realized by embodiments having the following configurations. 【0015】 According to one embodiment of the present invention, the all-solid-state secondary battery high-temperature pressurization system according to the present invention is characterized by including a pressurization section formed vertically so that an all-solid-state secondary battery is inserted downward and pressurizes the secondary battery with a supplied fluid; a door section configured to move up and down on one side and covering the open side of the pressurization section; a storage tank for storing the fluid; and a piping section communicating with the pressurization section and the storage tank to supply fluid from the storage tank to the pressurization section. 【0016】 According to another embodiment of the present invention, the pressurizing units in the all-solid-state secondary battery high-temperature pressurizing system according to the present invention are characterized in that a large number of them are arranged spaced apart from each other within the pressurizing space. 【0017】 According to another embodiment of the present invention, the pressurization process by multiple pressurizing units in the all-solid-state secondary battery high-temperature pressurization system according to the present invention is characterized in that they overlap each other in time. 【0018】 According to another embodiment of the present invention, the all-solid-state secondary battery high-temperature pressurization system according to the present invention further comprises a door transport unit connected to the door unit and configured to reciprocate between the pressurization unit and the standby unit, and a standby unit from which the pressurized secondary battery is discharged from the pressurization unit. 【0019】 According to another embodiment of the present invention, the individual pressurization section in the all-solid-state secondary battery high-temperature pressurization system according to the present invention is characterized by including a vessel having an internal space extending vertically for the insertion of a secondary battery, and an inlet for supplying fluid from the storage tank to the internal space. 【0020】 According to another embodiment of the present invention, the individual input holes in the all-solid-state secondary battery high-temperature pressurization system according to the present invention are characterized in that they are formed on the bottom surface of the corresponding vessel. 【0021】 According to another embodiment of the present invention, an individual pressurizing part 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 in the high-temperature pressurization system for all-solid-state secondary batteries according to the present invention are formed. 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 releasably 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 forward and backward 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 adheres to each other when the corresponding first contact part moves forward. 【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 for discharging the air in the internal space of the vessel when fluid is introduced into the internal space of the vessel. 【0026】 According to another embodiment of the present invention, an individual pressurizing part 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 plurality 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 all-solid-state secondary batteries according to the present invention includes a number of pressurization parts formed along the vertical direction so that the all-solid-state secondary batteries are inserted downward, and the secondary batteries are high-temperature pressurized by the supplied fluid; a number 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 all-solid-state secondary batteries 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 all-solid-state secondary batteries 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 all-solid-state secondary batteries 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 further comprises the steps of: lowering one side of an individual door portion to fix the secondary battery to be processed; moving the individual door portion toward the pressurizing portion by the door transport portion; and lowering the individual door portion to place the fixed secondary battery into the internal space of the corresponding vessel. [Effects of the Invention] 【0032】 The present invention has the following effects due to the configuration described above. 【0033】 The present invention has the effect of shortening the total process time because, by forming the pressurized section along the vertical direction, it is not necessary to discharge the fluid from the internal space of the vessel before removing the secondary battery from the vessel after the pressurizing process. 【0034】 Furthermore, the present invention has the effect of improving process efficiency because, by forming the pressurizing section along the vertical direction, there is no need to resupply the fluid to the internal space of the vessel before the pressurizing process. 【0035】 Furthermore, the present invention has the effect of increasing process efficiency by arranging a large number of pressurizing sections within a pressurized space, so that the high-temperature pressurizing process is carried out substantially simultaneously, or by any pair or more pressurizing sections overlapping in time. 【0036】 Furthermore, the present invention has the effect of shortening 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. 【0037】 Furthermore, the present invention has the effect of ensuring that the vessel and door are firmly joined together by inserting the fixing pin horizontally along one side of the vessel and door. 【0038】 Furthermore, the present invention has the effect of allowing the pressurized secondary battery to be removed independently from the vessel by configuring multiple lids to be able to move up and down independently of each other. 【0039】 On the other hand, even effects not explicitly mentioned herein, as well as the effects described below in the specification and their provisional effects that are expected by the technical features of the present invention, shall be treated as described in the specification of the present invention. [Brief explanation of the drawing] 【0040】 [Figure 1] This is a conceptual diagram of a high-temperature pressurized all-solid-state secondary battery system according to one embodiment of the present invention. [Figure 2] This is a schematic perspective view of the pressurized section and the lid. [Figure 3] Figure 1 is a vertical cross-sectional view of the pressurized section into which the cassette is inserted. [Figure 4] Figure 1 is a cross-sectional view illustrating the connection between the pressurized section and the door section. [Figure 5] This is a reference diagram illustrating a high-temperature pressurization method for all-solid-state secondary batteries according to one embodiment of the present invention. [Figure 6] This is a reference diagram illustrating a high-temperature pressurization method for all-solid-state secondary batteries according to one embodiment of the present invention. [Figure 7] This is a reference diagram illustrating a high-temperature pressurization method for all-solid-state secondary batteries according to one embodiment of the present invention. [Figure 8] This is a reference diagram illustrating a high-temperature pressurization method for all-solid-state secondary batteries according to one embodiment of the present invention. [Modes for carrying out the invention] 【0041】 Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. Embodiments of the present invention can be modified in various forms, and the scope of the present invention should not be construed as being limited to these embodiments, but rather as being construed in terms of the matters described in the claims. Furthermore, these embodiments are provided only as reference to further fully explain the present invention to those who are ordinary skill in the art. 【0042】 As used herein, the singular form may include the plural form unless the context clearly indicates otherwise. Also, as used herein, “comprise” and / or “comprising” identify the presence of the shape, figure, step, action, member, element, and / or group thereof mentioned, and do not exclude the presence or addition of one or more other shapes, figures, actions, members, elements, and / or groups thereof. 【0043】 In the following, when it is stated that one component (or layer) is placed on another component (or layer), it should be noted that the component may also be placed directly on the other component, or another component or layer may be interposed between them. Also, when it is stated that one component is placed directly on another component, there is no other component located between them. Furthermore, being located "on top," "above," "below," "upper side," "lower side," "one side," or "side" of a component refers to a relative positional relationship. 【0044】 In the following, when we describe one component being "connected" with another, this is understood to mean a concept that includes not only direct connection between the two components, but also connection by a third component. 【0045】 Figure 1 is a conceptual diagram of a high-temperature pressurized all-solid-state secondary battery system according to one embodiment of the present invention. 【0046】 In the following, with reference to the attached drawings, a high-temperature pressurized system 1 for all-solid-state secondary batteries according to one embodiment of the present invention will be described in detail. 【0047】 Referring to Figure 1, the present invention relates to a high-temperature pressurization system 1 for all-solid-state secondary batteries, and more particularly to a high-temperature pressurization system 1 for all-solid-state secondary batteries in which a pressurization section is formed along the vertical direction in which a high-temperature pressurization process is performed to maximize the contact interface between the solid electrolyte and the active material of the all-solid-state secondary battery and minimize the interfacial resistance. This shortens the tact time because there is no process of discharging fluid from the internal space of the vessel after the completion of the process, and the process efficiency is increased by arranging a large number of pressurization sections along predetermined intervals. 【0048】 The term "fluid" as used above refers to a pressure transmission medium that is stored in the storage tank 60 (described later) and introduced into the internal space 110a of the pressurized section 10, and is preferably a liquid. Furthermore, the "fluid" is more preferably, for example, an oily heat transfer fluid and / or water, but it should be noted that the scope of the present invention is not limited by the above examples. 【0049】 Furthermore, it is preferable to understand the above term "vertical direction" as being perpendicular to the ground. By forming the pressurizing section 10 along the vertical direction, the opening 111a, described later, is perpendicular to the ground, allowing the cassette 3 containing the all-solid-state secondary battery to be lowered into the internal space 110a of the pressurizing section 10 and discharged upward. A detailed explanation of this will be given later. 【0050】 Furthermore, the all-solid-state secondary battery, which undergoes a high-temperature pressurization process by the pressurization unit 10, may be directly placed into the cassette 3, or it may be packed in a separate airtight section (not shown) before being placed into the cassette 3, but the latter is preferred. The airtight section is preferably made of a material having high elongation characteristics 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 allow the pressurizing force from the fluid to be transmitted to the secondary battery located inside. 【0051】 Furthermore, as mentioned above and as will be described later, (one or more) secondary batteries can be housed in the cassette 3 and inserted into the pressurized section 10, but it should be noted that the secondary batteries do not necessarily have to be housed in the cassette 3. For example, the secondary batteries may be packed in an airtight section and inserted directly into the pressurized section 10, or they may be housed in a separate configuration for housing secondary batteries other than the cassette 3 and inserted into the pressurized section 10. The scope of the present invention is not limited by specific examples. 【0052】 A high-temperature pressurized all-solid-state secondary battery system 1 according to one embodiment of the present invention may include a pressurizing unit 10, a door unit 20, a door transport unit 30, a locking unit 40, a standby unit 50, a storage tank 60, and a piping unit 70. In Figure 1, one end of the piping unit 70 is shown connected to the storage tank 60 and the other end of the piping unit 70 is shown to be disconnected, but it should be noted that the other end of each individual piping unit 70 is connected to the corresponding pressurizing unit 10. It should also be noted that the door transport unit 30 and the standby unit 50 are not essential components of the present invention. 【0053】 Figure 2 is a schematic perspective view of the pressurizing section and the lid section, Figure 3 is a vertical cross-sectional view of the pressurizing section with the cassette shown in Figure 1 inserted, and Figure 4 is a cross-sectional view illustrating the connection between the pressurizing section and the door section shown in Figure 1. 【0054】 Referring to Figures 1 to 4, the pressurizing unit 10 is configured such that a cassette 3 containing an all-solid-state secondary battery is placed in its internal space 110a, and the secondary battery is subjected to high-temperature pressurization by the supplied fluid. Multiple such pressurizing units 10 may be arranged spaced apart from each other within the pressurizing space. For example, the pressurizing units 10 may be arranged along multiple rows and / or multiple columns within the pressurizing space. For example, as shown in Figure 1, seven pressurizing units 10 can be arranged along two rows spaced apart from each other in 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 takes a long time (for example, about 40 to 60 minutes). However, by arranging a number of pressurization units 10 as in one embodiment of the present invention, the high-temperature pressurization process for secondary batteries housed in a number of cassettes C can be performed substantially simultaneously, or the process times for at least some of the secondary batteries can overlap, thereby dramatically reducing the total process time. In other words, in one embodiment of the present invention, the pressurization process for individual pressurization units 10 and the corresponding secondary batteries in the cassette 3 may be performed substantially simultaneously, or only some of the pressurization units 10 and the corresponding secondary batteries in the cassette 3 may be performed substantially simultaneously, or the pressurization process for individual pressurization units 10 and the corresponding secondary batteries in the cassette 3 may be performed temporally independently, or the pressurization process performed via at least some of the pressurization units 10 may overlap temporally, and there are no further restrictions on this. In some cases, the pressurization process for individual pressurization units 10 may be performed chronologically. The above-mentioned "high-temperature pressurization process" or "pressurization process" is understood to mean the process from the moment a cassette C containing a secondary battery is inserted into an individual pressurization unit 10 until the cassette C is removed from the pressurization unit 10. Furthermore, the above-mentioned term "overlapping in time" is understood to mean a state in which at any given time the pressurization processes via at least some of the pressurization units 10 are performed simultaneously. For example, if a cassette C is inserted into one pressurization unit 10 at any given time, and the secondary battery is pressurized by the fluid in another pressurization unit 10, then the high-temperature pressurization processes by both pressurization units 10 overlap in time. 【0056】 Furthermore, it is preferable that the pressurizing section 10 is positioned perpendicular to the ground, and that the cassette 3 is inserted from above downwards (see Figure 2) and discharged upwards from its internal space 110a. 【0057】 For this purpose, the pressurizing section 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 Figures 2 and 3, the vessel 110 has the outer shape of the pressurizing section 10 and has an internal space 110a into which the cassette 3 is inserted. Preferably, the vessel 110 has a structure in which the bottom is sealed except for the insertion hole 130 which will be described later. The internal space 110a can be formed in such a way that it is recessed downward from a predetermined height of the vessel 110, and the cassette 3 is inserted downward. That is, the upper side of the internal space 110a is open. This makes it possible to easily remove the cassette 3 from the internal space 110a of the vessel 110 without discharging fluid from the internal space 110a after the high-temperature pressurizing process is completed. 【0059】 In contrast, we will now explain the problems that arise when the internal space 110a is formed in a horizontal direction. 【0060】 When the door section 20, described later, moves backward horizontally with at least one side of the internal space 110a open, the fluid filling the internal space 110a has no choice but to be automatically discharged to the outside of the vessel 110 through the opening 111a of the internal space 110a. In order to prevent this situation, a problem arises in that the fluid supplied into the internal space 110a of the vessel 110 must be discharged from the internal space 110a in advance before the door section 20 moves backward. 【0061】 Furthermore, when the high-temperature pressurization process is repeated, since the fluid in the internal space 110a has been discharged, an additional step must be added to resupply the fluid to the internal space 110a. In other words, time is required to discharge the entire fluid and to resupply the fluid to the internal space 110a, which can be a major factor in reducing the overall process efficiency. 【0062】 Furthermore, the internal space 110a may be a space through which fluid is supplied via the input 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 piping section 70 via the input hole 130. The internal space 110a can also communicate with the discharge hole 230 of the door section 20, which will be described later. In addition, the internal space 110a can be formed in the shape of a cylinder, for example, but the present invention is not limited thereto. 【0063】 Furthermore, an insertion portion 110b can be formed on the internal space 110a of the vessel 110. The insertion portion 110b communicates with the opening 111a of the internal space 110a and is formed to have a larger width or diameter than the opening 111a, and can be formed as a cylindrical structure, for example. One side of the door portion 20, which will be described later, can be inserted into such an insertion portion 110b and make contact with the stepped portion on the boundary side between the insertion portion 110b and the internal space 110a. In addition, a heat transfer portion 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 thereto. 【0064】 Referring to Figure 3, the tension wire 120 is a wire structure wound around the outer surface of the vessel 110, and can be wound to a thickness above a certain level so as to compress the vessel 110. Therefore, when fluid is supplied to the internal space 110a of the vessel 110, internal pressure is generated in the internal space 110a, and at this time, the tension wire 120 can control the internal pressure generated laterally. Furthermore, the internal pressure generated in the vertical direction can be controlled by the locking section 40, which will be described in detail later. It should also be noted that in other embodiments of the present invention, 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 internal pressure within a predetermined range. 【0065】 The input hole 130 is a through-hole configured to allow 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 section 70, which will be described later. When the valve 710 of the piping section 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. The input hole 130 can be formed at any position on the vessel 110, but considering that the top surface of the vessel 110 is covered by the door section 20 before and after the pressurization process, and that the tension wire 120 is wound around its sides, it is preferable to form it on 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 to allow the cassette 3 to be placed inside it. 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, when the cassette 3 is placed in the internal space 110a, dead space inevitably occurs, and the spacer 140 can be used to eliminate this. 【0067】 Therefore, it is preferable that the spacer 140 has an outer surface shape corresponding to the internal space 110a of the vessel 110, and the side into which the cassette 3 is inserted has a shape corresponding to the outer surface of the cassette 3, so that it can 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 Figure 2, the first insertion hole 150 is drilled at a predetermined height in the vessel 110 and is configured so that one side of the locking portion 40, which will be described later, is inserted into it. More specifically, after matching the first insertion hole 150 with the second insertion hole 240 of the door portion 20, the fixing pin 410 can be advanced and inserted into the insertion holes 150 and 240 so that the vessel 110 and the door portion 20 are joined together. Therefore, it is preferable that the first insertion hole 150 is formed to communicate with the insertion portion 110b at the height where the insertion portion 110b is formed. Furthermore, the first insertion hole 150 may be drilled together with the second insertion hole 240 substantially along the horizontal direction. 【0069】 Referring to Figures 2 to 4, the door section 20 is configured to move up and down and covers the upper part of the internal space 110a of the vessel 110. For example, the bottom of the door section 20 can be inserted into the internal space 110a and the insertion section 110b so that the internal space 110a of the vessel 110 is sealed. In this case, one side of the door section 20 may be connected to a driving means such as a hydraulic cylinder, a pneumatic cylinder (not shown), or a drive motor to move up and down, but the scope of the present invention is not limited thereto. In addition, a separate packing structure (not shown) to prevent fluid leakage may be formed at the joint between the door section 20 and the pressurizing section 10. Furthermore, the door section 20 can correspond to a configuration in which a cassette 3 is coupled to the bottom and substantially transports the cassette 3. 【0070】 Such a door portion 20 may include a connecting portion 210, a lid portion 220, a discharge hole 230, and a second insertion hole 240. 【0071】 The coupling portion 210 is configured such that one side is coupled to the lid portion 220 and moves back and forth between the pressurizing portion 10 and the standby portion 50 by the door transport portion 30. In one embodiment, the coupling portion 210 may be configured so that the other side moves up and down together with the lid portion 220. 【0072】 For this purpose, the coupling portion 210 may include a coupling plate 211, a first contact portion 213, a coupling guide portion 215, and a fixing plate 217. 【0073】 Referring to Figure 4, the coupling plate 211 has a plate-like structure in which one side is coupled to a drive 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 a drive motor. 【0074】 The first contact portion 213 is a pair of components that connect to the coupling plate 211 and is configured to move forward so as to be adjacent to each other, or backward so as to be separated from each other. Such first contact portions 213 are configured to contact each other with the second contact portion 221 of the lid portion 220, which will be described later, so that the lid portion 220 connects to the coupling portion 210. For this purpose, each individual first contact portion 213 may include a downward extension portion 2131 that extends downward from the bottom surface of the coupling plate 211, preferably vertically, and a bent portion 2133 that is bent in opposite directions from the bottom of the downward extension portion 2131, preferably horizontally. That is, each individual first contact portion 213 can be formed in an "L" shape. In this case, the downward extension portion 2131 connects to the coupling plate 211, but can be designed to move forward and backward by any known configuration. A large number of opposing first contact portions 213 can be formed on one side of the coupling plate 211, and it is preferable that only a number corresponding to one-to-one with the lid portion 220 are formed, but the scope of the present invention is not limited thereto. 【0075】 The coupling guide portion 215 has its upper end fixed to the fixing plate 217 and its lower end coupled to the coupling plate 211, controlling the coupling plate 211 to remain horizontal with respect to the ground. Multiple such coupling guide portions 215 may be formed spaced apart from each other, and there is no particular limit on their number. By using such coupling guide portions 215 to keep the coupling plate 211 and the lid portion 220 horizontal, the lid portion 220 can be easily inserted into the internal space 110a of the vessel 110. Furthermore, the coupling guide portion 215 may be, for example, cylindrical rod-shaped, but there is no particular limit on this. 【0076】 The fixing plate 217 is formed on the upper side of the coupling plate 211, and the coupling guide portion 215 is coupled to it, with a shaft connected to the drive means passing through it. Such a fixing plate 217 is fixed along the vertical direction and is preferably in the form of a plate, for example. Furthermore, it is preferable that the fixing plate 217 is formed as a single unit, 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 connecting 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 may include, for example, an upper portion 220a that is inserted into the insertion portion 110b and a lower portion 220b that is inserted into the opening 111a side 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. Therefore, the upper portion 220a may have a larger diameter size or width size than the lower portion 220b. The upper portion 220a and the lower portion 220b may have, for example, a cylindrical structure, but the scope of the present invention is not limited thereto. 【0078】 Furthermore, the bottom surface of one side of the lid 220, preferably the lower side 220b, can be configured to fix and connect to the cassette 3. For example, the cassette 3 may be configured to slide-connect to one side of the lid 220. Thus, the cassette 3 is placed into the internal space 110a of the vessel 110 by the descent of the lid 220, and after the completion of the high-temperature pressurization process, the cassette 3 can be transported to the waiting section 50 by the raising, lowering and horizontal movement of the lid 220. Fixing / connecting the lid 220 and the cassette 3 can also be done via any known structure other than a slide connection. However, in some cases, the lid 220 may simply serve the function of covering the pressurization section 10. 【0079】 Such a cover portion 220 may include a second contact portion 221. 【0080】 Referring to Figures 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 may include a head portion 2211 extending horizontally and a body portion 2213 extending from the bottom surface of the head portion 2211 to the upper surface of the lid portion 220. In this case, it is preferable that the head portion 2211 has a larger left-right width 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 come into 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 joint portion 210 and the lid portion 220 is not necessarily performed solely by the structure of the first contact portion 213 and the second contact portion 221, but may also be performed by other known structures. Also, contrary to what is shown in Figure 2, the second contact portion 211 may be formed in the shape of a rectangular plate rather than being cylindrical as a whole, and in this case, the first contact portion 213 may also be formed in a corresponding shape. 【0081】 Thus, a 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 a single coupling plate 211. Therefore, in one embodiment of the present invention, not only are the high-temperature pressurization processes performed by the number of pressurization units 210 substantially simultaneously, but the start and end times of the processes performed by the individual pressurization units 210 can also be different. That is, cassettes 3 fixed to individual lid portions 220 can be independently fed into the corresponding pressurization unit 10, and processed individual cassettes 3 can be discharged from the corresponding pressurization unit 10. 【0082】 Referring to Figure 3, the discharge hole 230 is configured as a flow path to allow air from the internal space 110a to be discharged to the outside when fluid is supplied to the internal space 110a for the high-temperature pressurization process. It is preferable that such a discharge hole 230 is drilled on the lid portion 220 side. To explain the air discharge via the discharge hole 230 in detail, during the fluid supply process to the internal space 110a of the vessel 110, air is discharged to the outside via the discharge hole 230. Subsequently, a valve (not shown) is closed or shut off when the fluid is discharged via the discharge hole 230. 【0083】 Referring to Figure 2, the second insertion hole 240 is drilled at a predetermined height in the lid portion 220, and is configured so that the locking portion 40 can be inserted into it. Preferably, the second insertion hole 240 is formed in a way that penetrates the upper portion 220a of the lid portion 220, and the details thereof are described in the description of the first insertion hole 150. 【0084】 Referring to Figure 1, the door transport unit 30 is connected to one side of the door unit 20, and is configured to cause the door unit 20 to reciprocate between the pressurizing unit 10 and the standby unit 50. Such a door transport unit 30 may be connected to the fixing plate 217 or to any position on the door unit 20, but the former is preferred. Furthermore, the door transport unit 30 can be configured to transport the door unit 20 by including any known configuration such as a hydraulic cylinder, a pneumatic cylinder or a drive motor, and the present invention is not limited by specific examples. The door transport unit 30 allows the door unit 20 to reciprocate in the horizontal direction. 【0085】 Referring to Figures 1 to 4, the locking portion 40 is configured to move forward and / or backward and be inserted into one side of the pressurizing portion 10 and the door portion 20, so that the door portion 20 covers the pressurizing portion 10 and is mutually coupled and fixed. The number of locking portions 40 can be formed in a number corresponding to the individual pressurizing portions 10. 【0086】 For this purpose, the locking section 40 may include a fixing pin 410. 【0087】 The fixing pin 410 is a horizontally extending pin type and is configured to be inserted into or released from the first insertion hole 150 and the second insertion hole 240 by forward and backward movement. The fixing pin 410 may also have a cylindrical configuration corresponding to the first insertion hole 150 and the second insertion hole 240, but there are no further restrictions. The fixing pin 410 can also be connected to any known means of movement, such as a hydraulic cylinder, a pneumatic cylinder, or a drive motor, to enable forward and / or reverse movement. Such a fixing pin 410 can control the internal pressure generated upward by the fluid supplied to the internal space 110a. 【0088】 However, in embodiments of the present invention, covering the top surface and, optionally, the bottom surface of the pressurizing section 10 is not limited by the configuration of the locking section 40. As another example, it should be noted that the top surface and, optionally, the bottom surface of the pressurizing section 10 may be sealed by a yoke frame or the like. As yet another example, the top surface of the pressurizing section 10 may be sealed using any known configuration, 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 examples. 【0089】 Referring to Figure 1, the standby unit 50 is configured to be mounted at a predetermined distance from the pressurizing unit 10, with a cassette 3 containing a secondary battery that has undergone the pressurizing process being mounted from the pressurizing unit 10. Such a standby unit 50 may also correspond to the side into which the cassette 3 is inserted for the pressurizing process. In other words, depending on the circumstances, the standby unit 50 can perform both the functions of an insertion unit and an ejection unit. 【0090】 The storage tank 60 is configured to supply the fluid, which is the pressure transmission medium, to the pressurizing section 10 while it is stored therein. Such a storage tank 60 can communicate with the input holes 130 of individual pressurizing sections 10 by the piping section 70. In this case, a heating block 610 can be formed on one side of the storage tank 60 in order to supply high-temperature fluid. In general, in all-solid-state secondary batteries, the solid electrolyte requires that the contact interface between the active material and the electrolyte be maximized while minimizing interfacial resistance, as ions move between the solid grid. This necessitates a high-temperature / high-pressure pressurizing process. For this reason, it is preferable that the storage tank 60 be equipped with a heating block 610 so that the fluid is supplied to the pressurizing section 10 in a high-temperature state. Furthermore, the storage tank 60 may be formed as one unit or as multiple units, and there are no further restrictions on this. 【0091】 The piping section 70 has a flow path configuration in which one end is connected to the pressurizing section 10 and the other end to the storage tank 60, thereby supplying fluid to the pressurizing section 10. A valve 710 can also be formed on one side of the piping section 70. The valve 710 is, for example, configured as a check valve, and the fluid supply to the pressurizing section 10 can be determined by opening or closing the valve. Furthermore, the piping section 70 can be configured so that fluid is easily supplied to the pressurizing section 10 by the operation of a pump (not shown). 【0092】 Figures 5 to 8 are reference diagrams illustrating a high-temperature pressurization method for all-solid-state secondary batteries according to one embodiment of the present invention. 【0093】 The following describes in detail a high-temperature pressurization method for an all-solid-state secondary battery according to one embodiment of the present invention, with reference to the attached drawings. Since the high-temperature pressurization method for an all-solid-state secondary battery described below can be performed by the high-temperature pressurization system 1 described above, detailed explanations of redundant content will be omitted. Furthermore, although the drawings show that pressurization processes by multiple pressurization units are performed simultaneously, this is merely for the sake of explanation, and it should be noted that at least some of the pressurization processes by the pressurization units do not necessarily have to be performed simultaneously. 【0094】 First, referring to Figure 5, a cassette 3 with a secondary battery or airtight compartment inside is located on the standby section 50. At this time, the standby section 50 may contain a single cassette 3 or multiple cassettes 3. 【0095】 Referring to Figure 6, one side of the door section 20 descends and connects with the cassette 3, then moves up and down to the pressurizing section 10 side. At this time, the connection of the cassette 3 may be performed by an operator or by a separate automatic device such as a robot arm, and there are no further restrictions on this. To describe this step in detail, the coupling plate 211 and the lid section 220 connected to the coupling plate 211 both descend when driven by the drive means. At this time, the first contact section 213 and the second contact section 221 are in close contact. After the cassette 3 is connected to the lid section 220, the coupling plate 211 and the lid section 220 both move up and down when driven by the drive means. After that, the door section 20 can be moved to the upper side of the pressurizing section 10 by the door transport section 30. As mentioned above, it should be noted that in the present invention, the door section 20 does not necessarily have to be connected to the cassette 3, and the secondary battery may be directly inserted into the pressurizing section 10. 【0096】 Subsequently, referring to Figure 7, the door portion 20 can be lowered so that the cassette 3 is placed into the inner space 110a of the vessel 110, and the lid portion 220 can be inserted into the opening 111a and insertion portion 110b of the inner space 110a. At this time, the lowering of the door portion 20 can be performed by the lowering of the coupling plate 211 and the lid portion 220 by the drive of the drive means. As a result, the inner space 110a of the vessel 110 can be completely sealed (see Figure 4). At this time, the fixing pin 410 can be advanced and inserted into the first insertion hole 150 and the second insertion hole 240. As a result, the vessel 110 and the door portion 20 can be coupled to each other. When the door pin 410 is inserted, the first contact portion 213 can be reversed to complete contact with the second contact portion 221. 【0097】 Subsequently, the valve 710 is opened to supply high-temperature fluid from the storage tank 60 to the internal space 110a of the vessel 110 via the piping section 70. Then, 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 process for the secondary battery in the cassette 3 corresponding to the individual pressurization unit 10 may be performed substantially simultaneously, or only the pressurization process for the secondary battery in the cassette 3 corresponding to some of the pressurization units 10 may be performed substantially simultaneously, or the pressurization process for the secondary battery in the cassette 3 corresponding to the individual pressurization unit 10 may be performed independently in time, or the pressurization process proceeding via at least some of the pressurization units 10 may overlap in time, and there are no further restrictions thereon. 【0099】 Referring to Figure 8, if a pressurized section 10 that has undergone the high-temperature pressurization process is present, the fixing pin 410 corresponding to the pressurized section 10 retracts and is released from the first insertion hole 150 and the second insertion hole 240. At this time, the first contact section 213 and the second contact section 221 corresponding to the pressurized section 10 can be brought into close contact. After that, the door section 20 can be raised and lowered so that the cassette 3 containing the processed secondary battery can be removed from the internal space 110a of the vessel 110. Alternatively, after the door section 20 is raised and lowered, the secondary battery may be removed from the pressurized section 10 by a separate operation. 【0100】 Furthermore, the operation of the door transport unit 30 allows the door unit 20, which is coupled to the cassette 3 containing the processed secondary battery, to move toward the standby unit 50. 【0101】 The above detailed description is illustrative of the present invention. Furthermore, the foregoing describes preferred embodiments of the present invention, and the present invention can be used in a variety of different combinations, modifications, and environments. That is, modifications and alterations are possible within the scope of the concept of the invention disclosed herein, the scope equivalent to the disclosed content, and / or within the scope of the art or knowledge of the art. The embodiments described herein describe the best possible state for realizing the technical idea of ​​the present invention, and various modifications are possible as required in the specific field of application and use of the present invention. Therefore, the above detailed description of the invention is not intended to limit the present invention to the disclosed embodiments. [Explanation of symbols] 【0102】 1. High-temperature pressurized system for all-solid-state secondary batteries 10 Pressurized section 110 Vessel 110a Interior space 111a opening 110b Insertion section 120 tension wire 130 Input hole 140 Spacer 150 First insertion hole 20 Door section 210 Joint 211 Bonding plate 213 First Contact Section 2131 Lower extension 2133 Bend section 215 Joint guide section 217 Fixing plate 220 Lid 220a Upper part 220b Lower part 221 Second Contact Section 2211 Head section 2213 Body part 230 Discharge hole 240 Second insertion hole 30 Door transport section 40 Locking section 410 Fixing pins 50 Waiting section 60 storage tanks 610 Heating Block 70 Piping section 710 Valve 3 cassettes

Claims

[Claim 1] A pressurizing section is formed vertically so that an all-solid-state secondary battery is inserted downward, and the secondary battery is pressurized by the supplied fluid. One side is configured to move up and down, and a door portion covers the open side of the pressurized section, A storage tank for storing the aforementioned 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, Includes, The aforementioned pressurizing units are arranged in large numbers at a distance from each other within a pressurized space, forming a high-temperature pressurizing system for all-solid-state secondary batteries. [Claim 2] The high-temperature pressurization system for all-solid-state secondary batteries according to claim 1, wherein the pressurization process by multiple pressurizing units overlaps with each other in time. [Claim 3] A door transport unit is connected to the door section and configured to allow the door section to reciprocate between a pressurizing section and a standby section, The all-solid-state secondary battery high-temperature pressurization system according to claim 1, further comprising a standby section from which the pressurized secondary battery is discharged. [Claim 4] Each pressurized section is A vessel having an internal space extending vertically so as to insert a secondary battery, The all-solid-state secondary battery high-temperature pressurization system according to claim 1, further comprising an inlet for supplying fluid from the storage tank to the internal space. [Claim 5] The all-solid-state secondary battery high-temperature pressurization system according to claim 4, wherein individual input holes are formed in the bottom surface of the corresponding vessel. [Claim 6] Each pressurized section is The all-solid-state secondary battery high-temperature pressurization system according to claim 4, further comprising spacers formed on the inner surface of the internal space to control the volume of individual internal spaces. [Claim 7] The aforementioned door section is formed in large numbers, Individual door sections are A coupling plate that moves up and down when connected to a drive mechanism on one side, The all-solid-state secondary battery high-temperature pressurization system according to claim 4, comprising a lid portion that is releasably coupled to the coupling plate and seals or opens the internal space of the vessel. [Claim 8] Individual door sections are The all-solid-state secondary battery high-temperature pressurization system according to claim 7, further comprising a coupling guide that is coupled to a corresponding coupling plate and controls the corresponding coupling plate to remain horizontal with respect to the ground. [Claim 9] Individual door sections are A pair of components that connect to a corresponding coupling plate, further including a first contact portion that moves back and forth relative to each other, The individual lids are, The all-solid-state secondary battery high-temperature pressurization system according to claim 7, comprising a second contact portion formed on the upper surface of a corresponding lid portion and in close contact with the corresponding first contact portion as it advances. [Claim 10] Individual door sections are The all-solid-state secondary battery high-temperature pressurization system according to claim 7, further comprising a discharge hole for discharging air from the internal space of the vessel when a fluid is introduced into the internal space of the vessel. [Claim 11] Each pressurized section is The vessel further includes a first insertion hole drilled at a predetermined height, Individual door sections are The lid further includes a second insertion hole drilled at a predetermined height, The all-solid-state secondary battery high-temperature pressurization system according to claim 7, further comprising a number of fixing pins that move forward and are inserted into corresponding first and second insertion holes. [Claim 12] Numerous pressurizing sections are formed vertically so that all-solid-state secondary batteries are inserted downward, and the secondary batteries are subjected to high temperature and pressurization by the supplied fluid. As one side descends, numerous door sections cover the open side of the corresponding pressurized section, A storage tank for storing the aforementioned fluid, A high-temperature pressurization system for all-solid-state secondary batteries, comprising: individual pressurization units and a piping section communicating with a storage tank to supply fluid from the storage tank to the individual pressurization units. [Claim 13] A method for high-temperature pressurizing an all-solid-state secondary battery using the high-temperature pressurizing system for all-solid-state secondary batteries described in claim 7, The steps include: lowering an individual door section to insert an individual secondary battery into the internal space of the corresponding vessel, or covering the open side of the corresponding vessel in which the individual secondary battery has been inserted; A high-temperature pressurization method for all-solid-state secondary batteries, comprising the step of raising and lowering individual pressurized door sections so that the processed secondary batteries are discharged from the internal space of the corresponding vessels. [Claim 14] The high-temperature pressurization method for all-solid-state secondary batteries according to claim 13, wherein the fluid is water. [Claim 15] Individual door sections are The invention further includes a discharge port that allows air from the internal space of the corresponding vessel to be discharged when a fluid is introduced into the internal space of the corresponding vessel, The steps include: introducing fluid from the storage tank into the internal space of individual vessels via piping; The high-temperature pressurization method for all-solid-state secondary batteries according to claim 13, further comprising the step of discharging air from the corresponding internal space to the outside when introducing a fluid into the internal space of an individual vessel. [Claim 16] The individual door section lowers to secure the secondary battery in which the process is to be carried out, A step in which an individual door is moved to the corresponding pressurizing section by a door transport section, A high-temperature pressurization method for all-solid-state secondary batteries according to claim 13, further comprising the step of lowering individual door sections to insert fixed secondary batteries into the internal space of corresponding vessels.

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