All-solid-state battery assembly

Abstract

An all-solid-state battery assembly includes: an all-solid-state battery including a plurality of electrode layers and a plurality of solid electrolyte layers laminated in a lamination direction; a case accommodating the all-solid-state battery; a restraint pad between a first inner surface of the case and the all-solid-state battery in the lamination direction; and a driving unit connected to the constraining pad so that the constraining pad controls a magnitude of pressure applied to the all-solid-state battery.

Description

[0001] Related Applications

[0002] This application claims the benefit of Korean Patent Application No. 10-2023-0132642 filed in the Korean Intellectual Property Office on October 5, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to all-solid-state battery assemblies. Background Art

[0004] Unlike primary batteries that cannot be recharged after being discharged, secondary batteries that can be reused by being charged after being discharged can be applied to various fields such as smartphones, automobiles, drones, and robots, and their importance is increasing.

[0005] Since secondary batteries according to the related art use liquid as an electrolyte, there are problems of poor stability such as explosion and fire when expansion due to temperature changes or leakage due to external impact occurs, and in order to solve these problems, research and development of all-solid-state batteries are being actively carried out.

[0006] All-solid-state batteries have high structural stability because the electrolyte located between the positive electrode active material layer and the negative electrode active material layer is formed of a solid, so there is no need to provide safety-related items (such as a separator), and the battery can be miniaturized with high energy density. However, in the case of all-solid-state batteries, there are limitations such as expansion and contraction of the electrode active material during charging / discharging. Therefore, the interface between the electrode active material and the solid electrolyte may separate, thereby reducing performance. Summary of the invention

[0007] On one hand, the present disclosure is made to solve the above-mentioned problems occurring in the prior art while keeping the advantages achieved by the prior art intact.

[0008] Embodiments of the present disclosure provide an all-solid-state battery assembly capable of controlling the pressure of the all-solid-state battery.

[0009] Embodiments of the present disclosure may provide an all-solid-state battery assembly that may acquire the pressure of an all-solid-state battery in real time and may control the pressure based on the acquired data.

[0010] The technical problems to be solved by the present disclosure are not limited to the above-mentioned problems, and any other technical problems not mentioned herein will be clearly understood by those skilled in the art to which the present disclosure belongs from the following description.

[0011] Embodiments of the present disclosure may provide an all-solid-state battery assembly that may acquire the pressure of an all-solid-state battery in real time and may control the pressure based on the acquired data.

[0012] According to an embodiment of the present disclosure, an all-solid-state battery assembly may include: an all-solid-state battery, including a plurality of electrode layers and a plurality of solid electrolyte layers laminated in a specific lamination direction; a shell, accommodating the all-solid-state battery; a constraint pad, between a first inner surface of the shell and the all-solid-state battery in the lamination direction; and a drive unit, connected to the constraint pad so that the constraint pad controls the magnitude of pressure applied to the all-solid-state battery.

[0013] The drive unit may be configured to adjust a distance between the restraint pad and a second inner surface of the housing opposite to the first inner surface of the housing.

[0014] The restraint pad may be disposed to be spaced apart from a second inner surface of the housing in the lamination direction to support the all-solid-state battery when pressed by the restraint pad, wherein the second inner surface overlaps the all-solid-state battery in the lamination direction.

[0015] The driving unit may be located between the second inner surface of the housing supporting the all-solid-state battery when pressed by the restraint pad and the restraint pad to control the magnitude of pressure applied by the restraint pad to the all-solid-state battery by changing its length.

[0016] The driving unit may include: a fixing portion protruding in a lamination direction from a second inner surface of a shell that supports the all-solid-state battery when pressed by a restraint pad; a coupling portion coupled to the fixing portion to move relative to the fixing portion in the lamination direction; and a driving portion connected to the coupling portion, and the driving portion drives the coupling portion so that the coupling portion moves relative to the fixing portion.

[0017] The coupling portion may be threadably coupled to the fixing portion, and the driving portion may be configured to rotate the coupling portion.

[0018] The driving unit may be a rotating electrical machine.

[0019] The all-solid-state battery assembly may further include a pressure acquisition unit overlapping the all-solid-state battery in the lamination direction to acquire the magnitude of pressure applied to the all-solid-state battery in the lamination direction.

[0020] The pressure acquisition unit may include: a first pressure acquisition unit stacked between the constraint pad and the all-solid-state battery; and a second pressure acquisition unit stacked between the second inner surface of the shell supporting the all-solid-state battery when pressed by the constraint pad and the all-solid-state battery.

[0021] The all-solid-state battery assembly may further include a processor that drives the driving unit based on the pressure of the all-solid-state battery acquired by the pressure acquiring unit.

[0022] The pressure may control the driving of the driving unit based on a difference between a preset initial pressure of the all-solid-state battery and a measured pressure of the all-solid-state battery.

[0023] The processor may control the driving unit such that the driving unit is driven when a ratio of the difference value to the preset initial pressure is greater than a preset indication value.

[0024] The processor can control the driving direction of the driving unit so that when the ratio of the difference to the preset initial pressure is greater than the preset indication value and the measured pressure of the all-solid-state battery is greater than the preset initial pressure, the pressure of the all-solid-state battery decreases.

[0025] The processor can control the driving direction of the driving unit so that when the ratio of the difference value to the preset initial pressure is greater than the preset indication value and the measured pressure of the all-solid-state battery is the preset initial pressure or less, the pressure of the all-solid-state battery increases.

[0026] The at least one driving unit may be a pair of driving units, and the pair of driving units may be disposed on one side and opposite sides of the all-solid-state battery.

[0027] The restraint pad may have elasticity, and a thickness of the restraint pad may be configured to change according to a pressure applied to the restraint pad.

[0028] As the driving unit is driven, the restraint pad may expand and contract in the lamination direction in the interior of the housing.

[0029] In some embodiments, an all-solid-state battery assembly is provided, comprising: an all-solid-state battery, comprising a plurality of electrode layers and a plurality of solid electrolyte layers laminated in a lamination direction; a shell for accommodating the all-solid-state battery; a constraint pad, between a first inner surface of the shell and the all-solid-state battery in the lamination direction; a drive unit, connected to the constraint pad so that the constraint pad controls the magnitude of pressure applied to the all-solid-state battery; and a pressure acquisition unit, disposed between the constraint pad and the all-solid-state battery.

[0030] The drive unit may be disposed between the restraint pad and a second inner surface of the housing opposite to the first inner surface of the housing.

[0031] In some embodiments, an all-solid-state battery assembly is provided, comprising: an all-solid-state battery, comprising a plurality of electrode layers and a plurality of solid electrolyte layers laminated in a lamination direction; a shell for accommodating the all-solid-state battery; a constraint pad, between a first inner surface of the shell and the all-solid-state battery in the lamination direction; a drive unit, connected to the constraint pad so that the constraint pad controls the magnitude of pressure applied to the all-solid-state battery; and a pressure acquisition unit, arranged between the all-solid-state battery and a second inner surface of the shell, the second inner surface being opposite to the first inner surface of the shell.

[0032] As discussed, the method and system suitably include the use of a controller or processor.

[0033] The term "all-solid-state battery" as used herein includes rechargeable secondary batteries that include a solid electrolyte, such as a gel or polymer (cured) or solid material, which may include ionomers and other electrolytic components for transferring ions between the electrodes of the battery.

[0034] In other aspects, a vehicle including an all-solid-state battery as disclosed herein is provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and other objects, features and advantages of the present disclosure will become more apparent from the following detailed description in conjunction with the accompanying drawings:

[0036] Figure 1 is a perspective view showing a housing of an all-solid-state battery assembly according to an embodiment of the present disclosure;

[0037] Figure 2 is a schematic diagram of the internal structure of a housing of an all-solid-state battery assembly viewed from a direction perpendicular to a lamination direction according to an embodiment of the present disclosure;

[0038] Figure 3 is a schematic diagram of the internal structure of the housing of the all-solid-state battery assembly viewed from the lamination direction according to an embodiment of the present disclosure;

[0039] Figure 4 and Figure 5 is a schematic diagram showing a driving scheme of a driving unit of an all-solid-state battery assembly according to an embodiment of the present disclosure;

[0040] Figure 6 is a schematic diagram showing a driving scheme of an all-solid-state battery assembly according to another embodiment of the present disclosure;

[0041] Figure 7 is a circuit diagram conceptually illustrating an all-solid-state battery according to an embodiment of the present disclosure; and

[0042] Figure 8 is a flowchart illustrating a process of controlling the pressure of an all-solid-state battery of an all-solid-state battery assembly according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0043] Hereinafter, the preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement the present disclosure. The following description is one of several embodiments of the embodiment, and when describing an embodiment, the detailed description of known functions or configurations is omitted to clarify the main points of the present disclosure.

[0044] When reference numerals are added to components in the various drawings in this specification, the same or similar reference numerals are used for the same or similar components throughout the specification. The same names will be used in other embodiments to describe components included in one embodiment and components including common functions. Based on the principle that the inventor must appropriately define the concept of terms in order to describe his or her invention in the best way, the terms or words used in this specification and claims should not be interpreted as limited to their ordinary or dictionary meanings, and must be interpreted with meanings and concepts consistent with the technical concept of the present disclosure.

[0045] In addition, the present disclosure is not limited to the above-mentioned embodiments, and a person skilled in the art to which the present disclosure belongs may make various modifications and changes from these descriptions. Therefore, the concept of the present disclosure should not be limited to the above-mentioned embodiments, and the scope of the patent claims described later and all things equivalent to or equivalent to the scope of the patent claims are considered to fall within the scope of the concept of the present disclosure.

[0046] The terms used herein are only used for the purpose of describing specific embodiments, and are not intended to limit the present disclosure. As used herein, unless the context clearly indicates otherwise, the singular forms "one", "an" and "the" are intended to also include plural forms. These terms are only intended to distinguish one component from another component, and these terms do not limit the nature, order or order of the components. It should also be understood that when the terms "include" and / or "include" are used in this specification, it specifies the existence of the features, wholes, steps, operations, elements and / or parts, but does not exclude the existence or addition of one or more other features, wholes, steps, operations, elements, parts and / or their combinations. As used in this article, the term "and / or" includes any and all combinations of one or more related listed items. Throughout the specification, unless explicitly described to the contrary, the word "include" and variants such as "include" or "contain" will be understood to imply the inclusion of the elements, but do not exclude any other elements. In addition, the terms "unit", "-person", "-device" and "module" described in the specification are meant to be used to process at least one function and operation unit, and can be implemented by hardware components or software components and combinations thereof.

[0047] Although the exemplary embodiments are described as using multiple units to perform the exemplary processes, it should be understood that the exemplary processes can also be performed by one or more modules. In addition, it should be understood that the term controller / control unit refers to a hardware device that includes a memory and a processor and is specifically programmed to perform the processes described herein. The memory is configured to store the modules, and the processor is specifically configured to execute the modules to perform one or more processes described further below.

[0048] In addition, the control logic of the present disclosure may be embodied as a non-volatile computer-readable medium on a computer-readable medium containing executable program instructions executed by a processor, controller, etc. Examples of computer-readable media include, but are not limited to, ROM, RAM, compact disk (CD)-ROMs, magnetic tapes, floppy disks, flash drives, smart cards, and optical data storage devices. The computer-readable medium may also be distributed in a network-coupled computer system so that the computer-readable medium is stored and executed in a distributed manner, such as by a telematics server or a controller area network (CAN).

[0049] Unless otherwise specified or apparent from the context, as used herein, the term "about" should be understood as being within the normal tolerance range in the art, such as within 2 standard deviations of the mean. "About" can be understood as being within 10%, 9%, 8%, 7%, 6%, 5%, 4%, 3%, 2%, 1%, 0.5%, 0.1%, 0.05%, or 0.01% of the value. Unless otherwise clear from the context, all numerical values ​​provided herein are modified by the term "about".

[0050] Figures 1 to 3 The structure of an all-solid-state battery assembly 1 according to an embodiment of the present disclosure is shown.

[0051] Figure 1 is a perspective view showing a housing 20 of an all-solid-state battery assembly 1 according to an embodiment of the present disclosure, Figure 2 is a schematic diagram of the internal structure of the housing 20 of the all-solid-state battery assembly 1 according to an embodiment of the present disclosure, and Figure 3 Schematic diagram of the internal structure of the housing 20 of the all-solid-state battery assembly 1 viewed from another direction according to an embodiment of the present disclosure.

[0052] In detail, Figure 2 is a schematic diagram of the shape of the internal structure of the housing 20 viewed from a first direction v1 perpendicular to the lamination direction of the all-solid-state battery according to an embodiment of the present disclosure, and Figure 3 Schematic diagram of the internal structure of the housing 20 of the all-solid-state battery assembly 1 viewed from the second direction v2 as the lamination direction of the all-solid-state battery (see Figure 1 ). However, it should be noted that in order to understand Figure 3 The internal structure in the embodiment of the present invention omits the shape of the restraint pad 30. In addition, it is noted in advance that Figure 2 and Figure 3 These are schematic diagrams conceptually showing components arranged in the interior of the housing 20 , and the shapes or arrangement structures of these components are not directly limited to these diagrams.

[0053] Structure of all-solid-state battery assembly 1

[0054] Reference Figure 2 , the all-solid-state battery assembly 1 according to an embodiment of the present disclosure may include an all-solid-state battery 10 , a housing 20 , a restraint pad 30 , and a driving unit 40 .

[0055] The all-solid-state battery 10 may be configured such that a plurality of electrode layers and a plurality of solid electrolyte layers are laminated along a specific lamination direction. The plurality of electrode layers may include a positive electrode layer and a negative electrode layer, and, for example, the all-solid-state battery 10 may be configured such that a positive electrode layer, a solid electrolyte layer, a negative electrode layer, and a solid electrolyte layer are repeatedly laminated in their order.

[0056] The housing 20 may be configured to accommodate the all-solid-state battery 10. The housing 20 may serve as a frame that accommodates the all-solid-state battery 10 and supports the all-solid-state battery 10 to maintain the shape of the all-solid-state battery 10. The housing 20 may be configured to have a shape of an angular shell surrounding the all-solid-state battery 10, for example.

[0057] The all-solid-state battery 10 may be laminated in a direction from an inner surface 21 of the shell 20 toward an inner surface 22 opposite thereto, and an inner surface 21 of the shell 20 and the opposite inner surface 22 may be surfaces opposite to each other. When pressed by the constraint pad 30, an inner surface 21 of the shell 20 may provide support for the all-solid-state battery 10. The area of ​​an inner surface 21 of the shell 20 and the opposite inner surface 22 may be greater than the area of ​​the all-solid-state battery 10. Here, the area of ​​the all-solid-state battery 10 may refer to a cross-sectional area perpendicular to its lamination direction. For example, the all-solid-state battery 10 may be located at the center portion of an inner surface 21 of the shell 20 and the opposite inner surface 22.

[0058] The constraint pad 30 may be configured to press the all-solid-state battery 10 in the lamination direction. The constraint pad 30 may be disposed inside the housing 20. The constraint pad 30 may be disposed to overlap the all-solid-state battery 10. The constraint pad 30 may have a shape that covers the all-solid-state battery 10, and its area is greater than that of the all-solid-state battery 10. For example, the constraint pad 30 may have a size corresponding to the inner surface of the housing 20.

[0059] One surface of the constraint pad 30 faces one surface of the all-solid-state battery 10, and the opposite surface of the constraint pad 30 may contact the opposite inner surface 22 of the housing 20. Basically, the all-solid-state battery 10 and the constraint pad 30 may be sequentially arranged in a direction from one inner surface 21 of the housing 20 toward the opposite inner surface 22.

[0060] Pressure on all-solid-state batteries 10

[0061] The all-solid-state battery 10 may be pressed between one inner surface 21 of the housing 20 and the restraint pad 30. That is, one inner surface 21 of the housing 20 and the restraint pad 30 may press the all-solid-state battery 10 therebetween, and therefore, a specific pressure may be generated in the lamination direction of the all-solid-state battery 10. That is, the pressure of the all-solid-state battery 10 may refer to the pressure generated in the lamination direction of the all-solid-state battery 10 when the all-solid-state battery 10 is pressed between one inner surface 21 of the housing 20 and the restraint pad 30.

[0062] Then, when the distance between the constraint pad 30 and one inner surface 21 of the housing 20 decreases, the pressure applied to the all-solid-state battery 10 may increase, and conversely, when the distance between the constraint pad 30 and one inner surface 21 of the housing 20 increases, the pressure applied to the all-solid-state battery 10 may decrease. The distance between the constraint pad 30 and one inner surface 21 of the housing 20 may be adjusted by the drive unit 40.

[0063] Drive unit 40

[0064] The driving unit 40 may be configured to control the pressure applied to the all-solid-state battery 10 through the restraint pad 30. The driving unit 40 may be disposed inside the housing 20. The driving unit 40 may be disposed inside the housing 20 and may be arranged to be spaced apart from the all-solid-state battery 10 by a certain distance.

[0065] The drive unit 40 may be connected to the restraint pad 30. The drive unit 40 may be connected to one inner surface 21 of the housing 20. The drive unit 40 may be connected to the restraint pad 30 and one inner surface 21 of the housing 20. The drive unit 40 may extend between one inner surface 21 of the housing 20 and the restraint pad 30.

[0066] The drive unit 40 is configured so that its length can be changed. Because the length of the drive unit 40 changes between one inner surface 21 of the housing 20 and the restraint pad 30, the distance between one inner surface 21 of the housing 20 and the restraint pad 30 can be adjusted, and therefore, the pressure applied to the all-solid-state battery 10 can be controlled by driving the drive unit 40.

[0067] For example, when the length of the driving unit 40 becomes shorter, the distance between one inner surface 21 of the housing 20 and the restraint pad 30 may decrease, resulting in an increase in the pressure applied to the all-solid-state battery 10. Conversely, when the length of the driving unit 40 becomes longer, the distance between one inner surface 21 of the housing 20 and the restraint pad 30 may increase, resulting in a decrease in the pressure applied to the all-solid-state battery 10. Figure 4 and Figure 5 The driving mechanism of the driving unit 40 is described in detail.

[0068] A plurality of drive units 40 may be provided. For example, a pair of drive units 40 may be provided on opposite sides of the all-solid-state battery 10. The drive unit 40 may include a first drive unit 41 provided on one side of the all-solid-state battery 10 and a second drive unit 42 provided on the opposite side of the all-solid-state battery 10. The first drive unit 41 and the second drive unit 42 may be controlled to have the same length to apply uniform pressure to the all-solid-state battery 10.

[0069] However, the number and arrangement form of the driving units 40 are not limited thereto, and a greater number of driving units 40 may be disposed around the all-solid-state battery 10 if necessary.

[0070] Pressure acquisition unit 50

[0071] The all-solid-state battery assembly 1 according to an embodiment of the present disclosure may further include a pressure acquisition unit 50 .

[0072] The pressure acquisition unit 50 may be configured to acquire the pressure of the all-solid-state battery 10. The pressure acquisition unit 50 may be configured to be stacked on the all-solid-state battery 10. The pressure acquisition unit 50 may overlap the all-solid-state battery 10 in a flat plate form, and may be, for example, a pressure sensor.

[0073] A plurality of pressure acquisition units 50 may be provided. The pressure acquisition unit 50 may include a first pressure acquisition unit 51 stacked between the constraint pad 30 and the all-solid-state battery 10, and a second pressure acquisition unit 52 stacked between one inner surface 21 of the housing 20 and the all-solid-state battery 10. Therefore, the second pressure acquisition unit 52, the all-solid-state battery 10, the first pressure acquisition unit 51, and the constraint pad 30 may be sequentially stacked in a direction from one inner surface 21 of the housing 20 toward the opposite inner surface 22.

[0074] The pressure acquisition unit 50 can acquire the pressure of the all-solid-state battery 10 between an inner surface 21 of the shell 20 and the constraint pad 30 in real time, and the pressure acquisition unit can be electrically connected to a processor to be described later to provide pressure data as a basis for controlling the drive unit 40.

[0075] Driving principle of drive unit 40

[0076] Figure 4 and Figure 5 is a schematic diagram showing a driving scheme of the driving unit 40 of the all-solid-state battery assembly 1 according to an embodiment of the present disclosure. Figure 4 The driving of the driving unit 40 to increase the pressure of the all-solid-state battery 10 is shown, and Figure 5 Driving of the driving unit 40 to reduce the stress of the all-solid-state battery 10 is shown.

[0077] refer to Figure 4 and Figure 5 According to an embodiment of the present disclosure, the driving unit 40 of the all-solid-state battery assembly 1 may include a fixing portion 401 , a coupling portion 402 , and a driving portion 403 .

[0078] The fixing portion 401 may be formed on one inner surface 21 of the housing 20. The fixing portion 401 may protrude from one inner surface 21 of the housing 20. The fixing portion 401 may be fixed to one inner surface 21 of the housing 20 in the form of a bolt having a certain length, for example. Then, the length direction of the fixing portion 401 may be the lamination direction of the all-solid-state battery 10.

[0079] The coupling portion 402 may be coupled to be movable relative to the fixing portion 401. For example, the coupling portion 402 may be coupled to be rotatable relative to the fixing portion 401. The coupling portion 402 may be in the form of a nut coupled to the fixing portion 401 provided in the form of a rotatable bolt. That is, the coupling portion 402 may have a thread on its inner surface, and the fixing portion 401 may engage with the thread. The coupling portion 402 provided in the form of a nut may be rotatable relative to the fixing portion 401, and may be movable in the length direction of the fixing portion 401. Therefore, adjusting the coupling portion 402 relative to the fixing portion 401 may allow the length of the drive unit 40 to be changed.

[0080] The driving part 403 may be connected to the connecting part 402, and may drive the connecting part 402 so that the connecting part 402 moves relative to the fixing part 401. For example, as described above, when the fixing part 401 and the coupling part 402 are provided in the form of a bolt and a nut and driven in a threaded scheme, the driving part 403 may be configured to rotate the coupling part 402. Then, the driving part 403 may be, for example, a rotating motor that is electrically driven.

[0081] The driving unit 40 may further include a terminal portion 404 .

[0082] The terminal portion 404 may be formed in the driving portion 403, and may supply external power to the driving portion 403 so that the driving portion 403 may drive the coupling portion 402. The terminal portion 404 may be provided in the form of an electrode, for example.

[0083] The driving portion 403 may be fixed to the restraint pad 30. As described above, the restraint pad 30 may be in contact with the opposite inner surface 22 of the housing 20. For example, the restraint pad 30 may be formed of an elastically deformable material. Therefore, when the driving portion 403 rotates the coupling portion 402 and the coupling portion 402 moves along the longitudinal direction of the fixing portion 401, the thickness of the restraint pad 30 may change correspondingly thereto. Because the distance between one inner surface 21 and the opposite inner surface 22 of the housing 20 is fixed, when the driving portion 403 rotates the coupling portion 402 and the length of the driving unit 40 increases, the thickness of the restraint pad 30 may decrease, and conversely, when the length of the driving unit 40 decreases, the thickness of the restraint pad 30 may increase.

[0084] When the coupling portion 402 is rotated in one direction by the driving portion 403, the length of the driving unit 40 may increase, and when the coupling portion 402 is rotated in the opposite direction, the length of the driving unit 40 may decrease. During the process of adjusting the length of the driving unit 40, the distance between the constraint pad 30 and one inner surface 21 of the housing 20 may change, and thus, the pressure of the all-solid-state battery 10 may be controlled. During the entire adjustment process, the pressure acquisition unit 50 may acquire the pressure of the all-solid-state battery 10, and here, acquisition may comprehensively represent the process of sensing the pressure of the all-solid-state battery 10 or calculating or deriving the pressure of the all-solid-state battery 10 based on the sensing data.

[0085] The pressure acquisition unit 50 can acquire the pressure of the all-solid-state battery 10. As described above, the pressure acquisition unit 50 may include a first pressure acquisition unit 51 stacked between the constraint pad 30 and the all-solid-state battery 10, and a second pressure acquisition unit 52 stacked between an inner surface 21 of the housing 20 and the all-solid-state battery 10.

[0086] Another embodiment (removable restraint pad)

[0087] Figure 6 is a schematic diagram showing a driving scheme of an all-solid-state battery assembly 2 according to another embodiment of the present disclosure.

[0088] The all-solid-state battery assembly 2 according to the second embodiment of the present disclosure may be different from the previous embodiment in that the thickness of the restraint pad 30 may not be deformed. The contents overlapping with the previous embodiment will be omitted, and reference will be made to Figure 6 Mainly describe the differences between them.

[0089] Reference Figure 6Similarly, in the all-solid-state battery assembly 2 according to the second embodiment of the present disclosure, when the coupling portion 402 is rotated in one direction by the driving portion 403, the length of the driving unit 40 may be increased, and when the coupling portion 402 is rotated in the opposite direction, the length of the driving unit 40 may be reduced. In the process of increasing and reducing the length of the driving unit 40, the distance between the constraint pad 31 and one inner surface 21 of the housing 20 may be changed, and therefore, the pressure of the all-solid-state battery 10 may be controlled.

[0090] Then, as the length of the drive unit 40 increases and decreases, the constraint pad 31 may move in the lamination direction. Then, the lamination direction in which the constraint pad 31 moves may refer to two directions, a direction from the constraint pad 31 toward one inner surface 21 of the housing 20 and a direction from the constraint pad 31 toward the opposite inner surface 22 of the housing 20. For example, when the length of the drive unit 40 decreases, the constraint pad 31 in contact with the opposite inner surface 22 of the housing 20 may also move in the direction in which the length of the drive unit 40 decreases, and may be spaced apart from the opposite inner surface 22 of the housing 20, and in this case, a space 25 may be generated between the constraint pad 31 and the opposite inner surface 22 of the housing 20.

[0091] In other words, as in the previous embodiment, even when the constraint pad is formed of an elastic material so that its thickness is not deformed, the constraint pad 31 can be moved in the lamination direction of the all-solid-state battery 10 according to the driving unit 40, and the pressure of the all-solid-state battery 10 can be controlled.

[0092] Control structure of all-solid-state battery components

[0093] Figure 7 is a circuit diagram conceptually illustrating an all-solid-state battery assembly according to an embodiment of the present disclosure.

[0094] Reference Figure 7 , the all-solid-state battery assembly according to an embodiment of the present disclosure may further include a processor 60 , a switch unit 70 , and a power unit 80 .

[0095] The processor 60 may control the driving of the driving unit 40 based on the pressure of the all-solid-state battery acquired in real time through the pressure acquisition unit 50. The processor 60 may include an ECU 61 and a current controller 62.

[0096] The ECU 61 and the current controller 62 may be electrically / physically connected to each other. The ECU 61 is an electronic control unit and may be connected to the pressure acquisition unit 50 to receive the acquired pressure and calculate it to transmit it to the current controller 62. In other words, the ECU 61 may adjust the amount of current required by the current controller 62 and input a signal. In addition, the ECU 61 may be connected to the switch unit 70 described later, and a signal of the rotation direction of the drive unit 403 may be input to the switch unit 70.

[0097] The current controller 62 may receive current from the power unit 80, and may be connected to the ECU 61 to receive a signal from the ECU 61. As will be described later, the power unit 80 may be configured to include the all-solid-state battery 10. The current controller 62 may receive current from the power unit 80, and may appropriately control the amount of current supplied to the drive portion 403 based on the signal received from the ECU 61.

[0098] The switch unit 70 may be provided between the processor 60 and the drive unit 40. The switch unit 70 may be configured to adjust the rotation direction of the drive portion 403 of the drive unit 40. The switch unit 70 is, for example, a 6-pin switch, and may control the drive portion 403 so that the drive portion 403 provided in the form of a motor rotates forward and reverse. The switch unit 70 may receive a forward / reverse rotation signal from the ECU 61 of the processor 60, and may receive a current (the amount of the current is controlled by the current controller 62 of the processor 60) and transmit it to the drive portion 403 of the drive unit 40.

[0099] The power unit 80 may include a battery 81 and a converter 82. The battery 81 may be configured to supply power, and the converter 82 may be a DC-DC converter. Preferably, the battery 81 may be the above-mentioned all-solid-state battery 10 accommodated in the housing 20. In other words, the drive unit 40 of the all-solid-state battery assembly according to the embodiment may receive power directly from the all-solid-state battery 10 in the housing 20 (rather than a separate external power source to be driven).

[0100] Pressure control algorithm for all-solid-state batteries

[0101] Figure 8 is a flowchart illustrating a process of controlling the pressure of an all-solid-state battery of an all-solid-state battery assembly according to an embodiment of the present disclosure.

[0102] Reference Figure 8 , the pressure of the all-solid-state battery assembly according to an embodiment of the present disclosure can be controlled by sequentially performing a pressure measuring operation a1, a pressure difference calculating operation a2, judging operations a3 and a4, and controlling operations a5 and a6.

[0103] In the pressure measurement operation a1, the pressure of the all-solid-state battery may be measured, and, for example, the changing pressure of the all-solid-state battery during charge / discharge may be measured in real time.

[0104] After that, in the pressure difference calculation operation a2, the difference between the preset initial pressure of the all-solid-state battery and the real-time measured pressure can be calculated. Next, the judgment operations a3 and a4 are performed to judge whether pressure adjustment is required and find out the pressure control method.

[0105] The judging operations a3 and a4 may include a pressure control judging operation a3 and a pressure control direction judging operation a4.

[0106] In the pressure control judgment operation a3, it can be judged whether the pressure needs to be controlled by the preset indication value "K". The preset indication value "K" can be set differently according to the size and type of various types of various all-solid-state batteries. In the pressure control judgment operation a3, the pressure Po of the all-solid-state battery preset in the initial stage and the pressure Pt of the all-solid-state battery measured can be compared, and for example, the difference between the two can be converted into an indication value and it can be determined whether the indication value is greater than the preset indication value "K".

[0107] If it is determined that the difference between the pressure Po of the all-solid-state battery preset in the initial stage and the pressure Pt of the all-solid-state battery measured is above the reference range, the process proceeds to the pressure control direction determination operation a4 to determine whether it is necessary to increase the pressure (increase in pressure) or decrease the pressure (decrease in pressure). When it is determined that the difference between the initial pressure Po of the all-solid-state battery and the measured pressure Pt of the all-solid-state battery is below the reference range, the operation a1 of measuring the pressure of the all-solid-state battery that changes in real time may be performed again.

[0108] In the pressure control direction determination operation a4, it can be determined whether the measured pressure Pt of the all-solid-state battery is higher or lower than the initial pressure Po, and through this, it can be determined whether to perform the pressure increase operation a5 or the pressure reduction operation a6 in the control operations a5 and a6. When the measured pressure Pt of the all-solid-state battery is greater than the initial pressure Po of the all-solid-state battery, the pressure reduction operation a6 of releasing the bolts and nuts and reducing the pressure can be performed, and when the measured pressure Pt of the all-solid-state battery is less than the initial pressure Po of the all-solid-state battery, the pressure increase operation a5 of further tightening the bolts and nuts and increasing the pressure can be performed.

[0109] In other words, control operations a5 and a6 may be performed based on the judgment performed in the pressure control direction judgment operation a4. In the control operation, the pressure increasing operation a5 of increasing the pressure of the all-solid-state battery by reducing the length of the driving unit or the pressure reducing operation a6 of reducing the pressure of the all-solid-state battery by increasing the length of the driving unit may be selectively performed.

[0110] In the pressure increasing operation a5, the driving part can be rotated in a direction in which the fixing part provided in the form of a bolt and the coupling part provided in the form of a nut are fastened to each other. Conversely, in the pressure reducing operation a6, the driving part can also be rotated in a direction in which the connection between the fixing part and the coupling part is loosened.

[0111] In all processes of charging and discharging the all-solid-state battery, for example, charging, using or leaving the all-solid-state battery, the sequential process including pressure measurement operation a1 to control operations a5 and a6 can be repeated, and the pressure of the all-solid-state battery can be maintained within an appropriate numerical range.

[0112] The all-solid-state battery assembly according to an embodiment of the present disclosure may control the pressure of the all-solid-state battery.

[0113] The all-solid-state battery assembly according to an embodiment of the present disclosure can acquire the pressure of the all-solid-state battery in real time, and can control the pressure based on the acquired data.

[0114] Furthermore, effects that can be easily predicted by those skilled in the art can be shown from the configuration according to the embodiment of the present disclosure.

[0115] The above description is a simple exemplary description of the technical spirit of the present disclosure, and a person skilled in the art to which the present disclosure belongs may make various corrections and modifications without departing from the essential features of the present disclosure.

[0116] Therefore, the embodiments disclosed in the present disclosure are not intended to limit the technical spirit of the present disclosure, but to describe these technical spirits, and the scope of the technical spirit of the present disclosure is not limited to these embodiments. The protection scope of the present disclosure should be interpreted by the attached claims, and all technical spirits within the equivalent scope should be interpreted as included in the scope of the present disclosure.

Claims

1. An all-solid-state battery assembly, comprising: An all-solid-state battery comprising a plurality of electrode layers and a plurality of solid electrolyte layers laminated in a lamination direction; A housing for accommodating the all-solid-state battery; a restraint pad, between the first inner surface of the housing and the all-solid-state battery in the lamination direction; as well as A driving unit is connected to the constraint pad so that the constraint pad controls the magnitude of the pressure applied to the all-solid-state battery.

2. The all-solid-state battery assembly according to claim 1, wherein: The driving unit is configured to adjust a distance between the restraint pad and a second inner surface of the shell, wherein the second inner surface is opposite to the first inner surface of the shell.

3. The all-solid-state battery assembly according to claim 1, wherein: The restraint pad is arranged to be spaced apart from a second inner surface of the housing, wherein the second inner surface overlaps the all-solid-state battery in the lamination direction to support the all-solid-state battery in the lamination direction when pressed by the restraint pad.

4. The all-solid-state battery assembly according to claim 1, wherein: The drive unit is located between the second inner surface of the shell and the constraint pad to control the magnitude of the pressure applied to the all-solid-state battery by the constraint pad by changing the length of the drive unit, wherein the second inner surface supports the all-solid-state battery when pressed by the constraint pad.

5. The all-solid-state battery assembly according to claim 1, wherein: The driving unit comprises: a fixing portion protruding from a second inner surface of the housing, wherein the second inner surface supports the all-solid-state battery in the lamination direction when pressed by the restraint pad; a coupling portion coupled to the fixing portion to move relative to the fixing portion in the laminating direction; and The driving portion is connected to the coupling portion and is configured to drive the coupling portion so that the coupling portion moves relative to the fixing portion.

6. The all-solid-state battery assembly according to claim 5, wherein: The coupling portion is threadedly coupled to the fixing portion, and Wherein, the driving portion is configured to rotate the coupling portion.

7. The all-solid-state battery assembly according to claim 6, wherein: The driving unit is a rotating motor.

8. The all-solid-state battery assembly according to claim 1, further comprising: A pressure acquisition unit overlaps with the all-solid-state battery in the lamination direction to acquire the magnitude of the pressure applied to the all-solid-state battery in the lamination direction.

9. The all-solid-state battery assembly according to claim 8, wherein: The pressure acquisition unit comprises: a first pressure acquisition unit, stacked between the constraint pad and the all-solid-state battery; and A second pressure acquisition unit is stacked between a second inner surface of the housing and the all-solid-state battery, wherein the second inner surface supports the all-solid-state battery when pressed by the restraint pad.

10. The all-solid-state battery assembly according to claim 7, further comprising: A processor is configured to drive the driving unit based on the pressure of the all-solid-state battery acquired by the pressure acquiring unit.

11. The all-solid-state battery assembly according to claim 10, wherein: The driving of the driving unit is pressure-controlled based on a difference between a preset initial pressure of the all-solid-state battery and the measured pressure of the all-solid-state battery.

12. The all-solid-state battery assembly according to claim 11, wherein: The processor controls the driving unit so that the driving unit is driven when a ratio of the difference value to the preset initial pressure is greater than a preset indication value.

13. The all-solid-state battery assembly according to claim 11, wherein: The processor controls the driving direction of the driving unit so that when the ratio of the difference to the preset initial pressure is greater than a preset indication value and the measured pressure of the all-solid-state battery is greater than the preset initial pressure, the pressure of the all-solid-state battery decreases.

14. The all-solid-state battery assembly according to claim 11, wherein: The processor controls the driving direction of the driving unit so that when the ratio of the difference to the preset initial pressure is greater than a preset indication value and the measured pressure of the all-solid-state battery is the preset initial pressure or less, the pressure of the all-solid-state battery increases.

15. The all-solid-state battery assembly according to claim 1, comprising a pair of drive units, in, The pair of driving units are disposed on one side and an opposite side of the all-solid-state battery.

16. The all-solid-state battery assembly according to claim 1, wherein: The restraint pad has elasticity, and a thickness of the restraint pad is configured to change according to a pressure applied to the restraint pad.

17. The all-solid-state battery assembly according to claim 1, wherein: The restraint pad is configured to expand and contract in the laminating direction inside the housing as the driving unit is driven.

18. An all-solid-state battery assembly, comprising: An all-solid-state battery comprising a plurality of electrode layers and a plurality of solid electrolyte layers laminated in a lamination direction; A housing for accommodating the all-solid-state battery; a restraint pad, between the first inner surface of the housing and the all-solid-state battery in the lamination direction; a driving unit connected to the constraint pad so that the constraint pad controls the magnitude of the pressure applied to the all-solid-state battery; as well as A pressure acquisition unit is arranged between the constraint pad and the all-solid-state battery.

19. The all-solid-state battery assembly according to claim 18, wherein: The driving unit is disposed between the restraint pad and a second inner surface of the shell, wherein the second inner surface is opposite to the first inner surface of the shell.

20. An all-solid-state battery assembly, comprising: An all-solid-state battery comprising a plurality of electrode layers and a plurality of solid electrolyte layers laminated in a lamination direction; A housing for accommodating the all-solid-state battery; a restraint pad, between the first inner surface of the housing and the all-solid-state battery in the lamination direction; a driving unit connected to the constraint pad so that the constraint pad controls the magnitude of the pressure applied to the all-solid-state battery; as well as A pressure acquisition unit is arranged between the all-solid-state battery and a second inner surface of the shell, wherein the second inner surface is opposite to the first inner surface of the shell.

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