All-solid rechargeable battery temperature measurement apparatus

Abstract

An all-solid rechargeable battery temperature measurement apparatus comprises: a seating part on which a first electrode tab of an all-solid rechargeable battery is seated; a pressing part positioned on the seating part and pressing the seating part with the first electrode tab interposed therebetween; a wire connected to the first electrode tab and positioned between the seating part and the pressing part; and a temperature sensor contacting the first electrode tab positioned between the seating part and the pressing part.

Description

All-solid-state secondary battery temperature measurement device

[0001] It relates to a temperature measuring device for an all-solid-state secondary battery.

[0002] Recent reports of explosion risks in batteries using liquid electrolytes have led to the development of all-solid-state secondary batteries. All-solid-state secondary batteries are batteries composed entirely of solid materials and utilize solid electrolytes.

[0003] These all-solid-state secondary batteries are safe because there is no risk of explosion due to electrolyte leakage, and they have the advantage of being easy to manufacture thin batteries.

[0004] An all-solid-state secondary battery includes an all-solid-state electrode assembly including a cathode, a cathode, and a solid electrolyte layer, and a pouch storing the same therein.

[0005] In order to analyze the state of an all-solid-state secondary battery during charging and discharging, it is necessary to measure the temperature inside the all-solid-state secondary battery.

[0006] One embodiment is to provide an all-solid-state secondary battery temperature measuring device capable of measuring temperature and voltage inside an all-solid-state secondary battery.

[0007] One aspect provides an all-solid-state secondary battery temperature measuring device including a mounting portion on which a first electrode tab of an all-solid-state secondary battery is mounted, a pressing portion positioned on the mounting portion and pressing the mounting portion with the first electrode tab therebetween, a wire connected to the first electrode tab positioned between the mounting portion and the pressing portion, and a temperature sensor in contact with the first electrode tab positioned between the mounting portion and the pressing portion.

[0008] It may further include a control unit connected to the above wire and the above temperature sensor.

[0009] The control unit applies current to the first electrode tab through the wire, and the control unit can measure the temperature of the all-solid-state secondary battery through the first electrode tab through the temperature sensor.

[0010] The above temperature sensor may include a thermocouple.

[0011] The above-described all-solid-state secondary battery may include the first electrode, a second electrode on the first electrode, an all-solid-state electrode assembly positioned between the first electrode and the second electrode, a pouch sealing the all-solid-state electrode assembly in an internal space, the first electrode tab protruding from the first electrode through the pouch and out of the pouch, and a second electrode tab spaced apart from the first electrode tab and protruding from the second electrode through the pouch and out of the pouch.

[0012] The second electrode tab is mounted on the above-mentioned mounting portion, the pressing portion presses the mounting portion with the second electrode tab therebetween, and may further include another wire connected to the second electrode tab positioned between the mounting portion and the pressing portion, and another temperature sensor in contact with the second electrode tab positioned between the mounting portion and the pressing portion.

[0013] The above-mentioned all-solid-state secondary battery may further include a pressing jig for pressing the front and back surfaces of the pouch.

[0014] It may further include a fixing part that is coupled to the above-mentioned fixing part and fixed to the above-mentioned pressurizing jig.

[0015] A portion of the above pressurized jig can be inserted into the above fixed portion.

[0016] It may further include an elastic hinge that connects the above-mentioned mounting portion and the above-mentioned pressing portion and elastically rotates the pressing portion with respect to the above-mentioned mounting portion.

[0017] The pressurizing unit may include a first sub-pressurizing unit equipped with the wire, and a second sub-pressurizing unit coupled to the first sub-pressurizing unit and equipped with the temperature sensor.

[0018] The first sub-pressure part and the second sub-pressure part can rotate simultaneously by the elastic hinge.

[0019] The first sub-pressurizing portion may include a conductor, and the second sub-pressurizing portion may include an insulator.

[0020] The first sub-pressure portion may include a wire connection portion to which the wire is connected, and a tab contact portion connected to the wire connection portion and in contact with the first electrode tab.

[0021] The second sub-pressurizing portion includes a through-hole corresponding to the first electrode tab, and the temperature sensor extends along the side of the second sub-pressurizing portion and can penetrate the through-hole to come into contact with the first electrode tab.

[0022] The above wire and the above temperature sensor can be mounted on the mounting portion between the mounting portion and the pressurizing portion.

[0023] The above-mentioned mounting portion may include a heat-resistant structure in which the wire and the temperature sensor are located.

[0024] The first electrode tab is mounted on the heat-resistant structure, and the wire and the temperature sensor can be in contact with the first electrode tab.

[0025] It may further include a hinge connecting the above-mentioned mounting portion and the above-mentioned pressing portion.

[0026] The above wire may include a heat-resistant material.

[0027] According to one embodiment, an all-solid-state secondary battery temperature measuring device capable of measuring temperature and voltage inside an all-solid-state secondary battery is provided.

[0028] Figure 1 is a cross-sectional view of an all-solid-state battery.

[0029] Figure 2 is a cross-sectional view of an all-solid-state battery including a precipitated negative electrode.

[0030] FIG. 3 is a perspective view showing an all-solid-state secondary battery temperature measuring device according to one embodiment of measuring temperature and voltage inside an all-solid-state secondary battery.

[0031] FIG. 4 is a side view showing an all-solid-state secondary battery temperature measuring device according to one embodiment of measuring temperature and voltage inside an all-solid-state secondary battery.

[0032] Figure 5 is a cross-sectional view of an all-solid-state secondary battery taken along line V-V of Figure 3.

[0033] Fig. 6 is a perspective view showing an all-solid-state secondary battery temperature measuring device according to one embodiment.

[0034] Fig. 7 is a perspective view showing the back surface of the second sub-pressurizing section of the pressurizing section of the all-solid-state secondary battery temperature measuring device according to one embodiment.

[0035] Fig. 8 is a perspective view showing an all-solid-state secondary battery temperature measuring device according to another embodiment.

[0036] FIG. 9 is a perspective view showing an all-solid-state secondary battery temperature measuring device according to another embodiment for measuring temperature and voltage inside an all-solid-state secondary battery.

[0037] Fig. 10 is a perspective view showing an all-solid-state secondary battery temperature measuring device and an all-solid-state secondary battery according to another embodiment.

[0038] Fig. 11 is a perspective view showing an all-solid-state secondary battery temperature measuring device according to another embodiment for measuring temperature and voltage inside an all-solid-state secondary battery.

[0039] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. The present invention may be implemented in various different forms and is not limited to the embodiments described herein.

[0040] Additionally, throughout the specification, whenever a part is said to "include" a component, this does not mean that it excludes other components, but rather that it may include other components, unless otherwise specifically stated.

[0041] To clearly illustrate various layers and regions in the drawings, their thicknesses are enlarged, and similar parts are designated by the same drawing reference numerals throughout the specification. When an element such as a layer, film, region, or plate is said to be "over" or "on" another element, this includes not only the case where it is "directly over" the other element, but also the case where there are other elements in between. Conversely, when an element is said to be "directly over" another element, it means that there are no other elements in between.

[0042] Furthermore, the term "layer" here includes not only shapes formed on the entire surface when observed in a plan view, but also shapes formed on a portion of the surface. Here, "or" is not interpreted in an exclusive sense; for example, "A or B" is interpreted to include A, B, A+B, etc.

[0043] Cathode for all-solid-state secondary batteries

[0044] In one embodiment, a positive electrode for an all-solid-state secondary battery is provided, which includes a current collecting layer and a positive electrode active material layer positioned on the current collecting layer, wherein the positive electrode active material layer includes at least one of a positive electrode active material, a sulfide-based solid electrolyte, a binder, and a conductive material. However, without limitation thereto, the positive electrode for an all-solid-state secondary battery may include more or less components than the components described above.

[0045] In one embodiment, a positive electrode for an all-solid-state secondary battery is manufactured by applying a positive electrode composition including at least one of a positive electrode active material, a sulfide-based solid electrolyte, a binder, and a conductive material to a current collecting layer, followed by drying and rolling.

[0046] positive electrode active material

[0047] The cathode active material can be applied without limitation as long as it is one commonly used in all-solid-state secondary batteries. For example, the cathode active material may be a compound capable of reversible lithium intercalation and deintercalation, and may include a compound represented by any of the following chemical formulas.

[0048] Li a A 1-b X b D2(0.90 ≤ a ≤ 1.8, 0 ≤ b ≤ 0.5);

[0049] Li a A 1-b X b O 2-c D c (0.90 ≤ a ≤ 1.8, 0 ≤ b ≤ 0.5, 0 ≤ c ≤ 0.05);

[0050] Li a E 1-b X b O 2-c D c (0.90 ≤ a ≤ 1.8, 0 ≤ b ≤ 0.5, 0 ≤ c ≤ 0.05);

[0051] Li a E 2-b X b O4-c D c (0.90 ≤ a ≤ 1.8, 0 ≤ b ≤ 0.5, 0 ≤ c ≤ 0.05);

[0052] Li a Ni 1-b-c Co b X c D α (0.90 ≤ a ≤1.8, 0 ≤ b ≤ 0.5, 0 ≤ c ≤ 0.5, 0 <α ≤ 2);

[0053] Li a Ni 1-b-c Co b X c O 2-α T α (0.90 ≤ a ≤ 1.8, 0 ≤ b ≤ 0.5, 0 ≤ c ≤ 0.05, 0 < α < 2);

[0054] Li a Ni 1-b-c Co b X c O 2-α T2(0.90 ≤ a ≤ 1.8, 0 ≤ b ≤ 0.5, 0 ≤ c ≤ 0.05, 0 < α < 2);

[0055] Li a Ni 1-b-c Mr b X c D α (0.90 ≤ a ≤ 1.8, 0 ≤ b ≤ 0.5, 0 ≤ c ≤ 0.05, 0 < α ≤ 2);

[0056] Li a Ni 1-b-c Mr b X c O 2-α T α (0.90 ≤ a ≤ 1.8, 0 ≤ b ≤ 0.5, 0 ≤ c ≤ 0.05, 0 < α < 2);

[0057] Li a Ni 1-b-c Mr b X c O 2-αT2(0.90 ≤ a ≤ 1.8, 0 ≤ b ≤ 0.5, 0 ≤ c ≤ 0.05, 0 <α < 2);

[0058] The a Nor b E c G d O2(0.90 ≤ a ≤ 1.8, 0 ≤ b ≤ 0.9, 0 ≤ c ≤ 0.5, 0.001 ≤ d ≤ 0.1);

[0059] The a Nor b Co c Mn d G e O2(0.90 ≤ a ≤ 1.8, 0 ≤ b ≤ 0.9, 0 ≤ c ≤ 0.5, 0 ≤ d ≤0.5, 0.001 ≤ e ≤ 0.1);

[0060] The a NiG b O2(0.90 ≤ a ≤ 1.8, 0.001 ≤ b ≤ 0.1);

[0061] The a CoG b O2(0.90 ≤ a ≤ 1.8, 0.001 ≤ b ≤ 0.1);

[0062] The a Mn 1-b G b O2(0.90 ≤ a ≤ 1.8, 0.001 ≤ b ≤ 0.1);

[0063] The a Mn2G b O4(0.90 ≤ a ≤ 1.8, 0.001 ≤ b ≤ 0.1);

[0064] The a Mn 1-g G g PO4(0.90 ≤ a ≤ 1.8, 0 ≤ g ≤ 0.5);

[0065] QO2; QS2; LiQS2;

[0066] V2O5; LiV2O5;

[0067] LiZO2;

[0068] LiNiVO4;

[0069] Li (3-f) J2(PO4)3(0 ≤ f ≤ 2);

[0070] Li (3-f) Fe2(PO4)3(0 ≤ f ≤ 2);

[0071] Li a FePO4(0.90 ≤ a ≤ 1.8).

[0072] In the above chemical formulas, A is selected from the group consisting of Ni, Co, Mn, and combinations thereof; X is selected from the group consisting of Al, Ni, Co, Mn, Cr, Fe, Mg, Sr, V, rare earth elements, and combinations thereof; D is selected from the group consisting of O, F, S, P, and combinations thereof; E is selected from the group consisting of Co, Mn, and combinations thereof; T is selected from the group consisting of F, S, P, and combinations thereof; G is selected from the group consisting of Al, Cr, Mn, Fe, Mg, La, Ce, Sr, V, and combinations thereof; Q is selected from the group consisting of Ti, Mo, Mn, and combinations thereof; Z is selected from the group consisting of Cr, V, Fe, Sc, Y, and combinations thereof; J is selected from the group consisting of V, Cr, Mn, Co, Ni, Cu, and combinations thereof.

[0073] The cathode active material may be, for example, lithium cobalt oxide (LCO), lithium nickel oxide (LNO), lithium nickel cobalt oxide (NC), lithium nickel cobalt aluminum oxide (NCA), lithium nickel cobalt manganese oxide (NCM), lithium nickel manganese oxide (NM), lithium manganese oxide (LMO), or lithium iron phosphate (LFP).

[0074] The positive electrode active material may include a lithium nickel-based oxide represented by the following chemical formula 1, a lithium cobalt-based oxide represented by the following chemical formula 2, a lithium iron phosphate-based compound represented by the following chemical formula 3, or a combination thereof.

[0075] [Chemical Formula 1]

[0076] Li a1 Ni x1 M 1 y1 M 2 1-x1-y1 O2

[0077] In the above chemical formula 1, 0.9≤a1≤1.8, 0.3≤x1≤1, 0≤y1≤0.7, and M 1 and M 2 is one or more elements independently selected from the group consisting of Al, B, Ba, Ca, Ce, Co, Cr, Cu, F, Fe, Mg, Mn, Mo, Nb, P, S, Si, Sr, Ti, V, W, and Zr.

[0078] [Chemical Formula 2]

[0079] Li a2 Co x2 M 3 1-x2 O2

[0080] In the above chemical formula 2, 0.9≤a2≤1.8, 0.6≤x2≤1, and M 3 is one or more elements selected from the group consisting of Al, B, Ba, Ca, Ce, Cr, Cu, F, Fe, Mg, Mn, Mo, Nb, P, S, Si, Sr, Ti, V, W, and Zr.

[0081] [Chemical Formula 3]

[0082] Li a3 Fe x3 M 4 (1-x3) PO4

[0083] In the above chemical formula 3, 0.9≤a3≤1.8, 0.6≤x3≤1, and M 4 is one or more elements selected from the group consisting of Al, B, Ba, Ca, Ce, Co, Cr, Cu, F, Fe, Mg, Mn, Mo, Nb, P, S, Si, Sr, Ti, V, W, and Zr.

[0084] The average particle diameter (D50) of the positive electrode active material may be 1 μm to 25 μm, for example, 3 μm to 25 μm, 5 μm to 25 μm, 5 μm to 20 μm, 8 μm to 20 μm, or 10 μm to 18 μm. A positive electrode active material having such a particle diameter range can be harmoniously mixed with other components within the positive electrode active material layer and can realize high capacity and high energy density.

[0085] The above-mentioned positive electrode active material may be in the form of a secondary particle formed by agglomeration of a plurality of primary particles, or may be in the form of a single particle. In addition, the above-mentioned positive electrode active material may be spherical or nearly spherical in shape, or may be polyhedral or irregular in shape.

[0086] Sulfide-based solid electrolyte

[0087] Sulfide-based solid electrolytes include, for example, Li2S-P2S5, Li2S-P2S5--LiX (where X is a halogen element, for example, I or Cl), Li2S-P2S5-Li2O, Li2S-P2S5-Li2O-LiI, Li2S-SiS2, Li2S-SiS2-LiI, Li2S-SiS2-LiBr, Li2S-SiS2-LiCl, Li2S-SiS2-B2S3-LiI, Li2S-SiS2-P2S5-LiI, Li2S-B2S3, Li2S-P2S5-Z. m S n (m, n are integers, Z is Ge, Zn or Ga), Li2S-GeS2, Li2S-SiS2-Li3PO4, Li2S-SiS2-Li p MO q (p, q are integers, and M is P, Si, Ge, B, Al, Ga or In), or a combination thereof.

[0088] Such sulfide-based solid electrolytes can be obtained, for example, by mixing Li2S and P2S5 in a molar ratio of 50:50 to 90:10, or 50:50 to 80:20, and optionally heat-treating them. Within the above mixing ratio range, a sulfide-based solid electrolyte having excellent ionic conductivity can be produced. Here, the ionic conductivity can be further improved by further including other components such as SiS2, GeS2, and B2S3.

[0089] Methods for mixing sulfur-containing raw materials for producing sulfide-based solid electrolytes include mechanical milling or the solution method. Mechanical milling involves placing the starting raw materials in a reactor and vigorously stirring them with a ball mill or similar device to finely atomize and mix them. Using the solution method, the starting raw materials are mixed in a solvent to obtain a solid electrolyte as a precipitate. Furthermore, heat treatment after mixing can solidify the crystals of the solid electrolyte and improve ionic conductivity. For example, a sulfide-based solid electrolyte can be produced by mixing sulfur-containing raw materials and heat-treating them twice or more, resulting in a sulfide-based solid electrolyte with high ionic conductivity and robustness.

[0090] For example, the sulfide-based solid electrolyte particles may include argyrodite-type sulfides. The argyrodite-type sulfides may include, for example, Li a M b P c S d A e (wherein a, b, c, d and e are all 0 or more and 12 or less, M is a metal other than Li or a combination of multiple metals other than Li, and A is F, Cl, Br, or I) and a specific example is Li 7-x PS 6-x A x(x is 0.2 or more and 1.8 or less, and A is F, Cl, Br, or I) can be expressed by the chemical formula. The above argyrodite-type sulfide is specifically Li3PS4, Li7P3S 11 , Li7PS6, Li6PS5Cl, Li6PS5Br, Li 5.8 PS 4.8 Cl 1.2 , Li 6.2 PS 5.2 Br 0.8 It could be the back.

[0091] Sulfide-based solid electrolyte particles containing these argyrodite-type sulfides have an ionic conductivity of 10, which is the ionic conductivity of a typical liquid electrolyte at room temperature. -4 10 inland -2 It has a high ionic conductivity approaching the S / cm range, can form a close bond between a positive electrode active material and a solid electrolyte without causing a decrease in ionic conductivity, and can further form a close interface between an electrode layer and a solid electrolyte layer. An all-solid-state battery including this can have improved battery performance, such as rate characteristics, Coulombic efficiency, and cycle life characteristics.

[0092] An argyrodite-type sulfide-based solid electrolyte can be prepared, for example, by mixing lithium sulfide, phosphorus sulfide, and optionally, a lithium halide. After mixing, a heat treatment may be performed. The heat treatment may include, for example, two or more heat treatment steps.

[0093] According to one embodiment, the average particle diameter (D50) of the sulfide-based solid electrolyte particles may be 5.0 ㎛ or less, for example, 0.1 ㎛ to 5.0 ㎛, 0.1 ㎛ to 4.0 ㎛, 0.1 ㎛ to 3.0 ㎛, 0.5 ㎛ to 2.0 ㎛, or 0.1 ㎛ to 1.5 ㎛. Alternatively, the sulfide-based solid electrolyte particles may be small particles having an average particle diameter (D50) of 0.1 ㎛ to 1.0 ㎛, or may be large particles having an average particle diameter (D50) of 1.5 ㎛ to 5.0 ㎛, depending on the location or purpose of use. The sulfide-based solid electrolyte particles having such a particle diameter range can effectively penetrate between solid particles in a battery, and have excellent contact with an electrode active material and connectivity between solid electrolyte particles. The average particle size of the sulfide-based solid electrolyte particles may be measured from a microscope image, for example, by measuring the sizes of about 20 particles in a scanning electron microscope image to obtain a particle size distribution and calculating D50 from this.

[0094] The content of the solid electrolyte in the positive electrode for the all-solid-state battery may be 0.5 wt% to 35 wt%, for example, 1 wt% to 35 wt%, 5 wt% to 30 wt%, 8 wt% to 25 wt%, or 10 wt% to 20 wt%. This is the content relative to the total weight of components in the positive electrode, and specifically, it can be said to be the content relative to the total weight of the positive electrode active material layer.

[0095] In one embodiment, the positive electrode active material layer may include 50 wt% to 99.35 wt% of the positive electrode active material, 0.5 wt% to 35 wt% of the sulfide-based solid electrolyte, 0.1 wt% to 10 wt% of the fluorine-based resin binder, and 0.05 wt% to 5 wt% of the vanadium oxide, based on 100 wt% of the positive electrode active material layer. When the above content ranges are satisfied, the positive electrode for an all-solid-state secondary battery can maintain high adhesiveness while implementing high capacity and high ionic conductivity, and the viscosity of the positive electrode composition can be maintained at an appropriate level, thereby improving processability.

[0096] bookbinder

[0097] The binder serves to adhere the positive electrode active material particles well to each other and also to adhere the positive electrode active material well to the current collector, and representative examples thereof include, but are not limited to, polyvinyl alcohol, carboxymethyl cellulose, hydroxypropyl cellulose, diacetyl cellulose, polyvinyl chloride, carboxylated polyvinyl chloride, polyvinyl fluoride, polymers containing ethylene oxide, polyvinyl pyrrolidone, polyurethane, polytetrafluoroethylene, polyvinylidene fluoride, polyethylene, polypropylene, styrene-butadiene rubber, acrylated styrene-butadiene rubber, epoxy resin, nylon, etc.

[0098] Challenge

[0099] The above-described positive electrode active material layer may further include a conductive material. The conductive material is used to impart conductivity to the electrode, and may include, for example, carbon-based materials such as natural graphite, artificial graphite, carbon black, acetylene black, Ketjen black, carbon fibers, and carbon nanotubes; metal-based materials containing copper, nickel, aluminum, silver, and the like in the form of metal powder or metal fibers; conductive polymers such as polyphenylene derivatives; or combinations thereof.

[0100] The conductive material may be included in an amount of 0.1 wt% to 5 wt%, or 0.1 wt% to 3 wt%, based on the total weight of each component of the positive electrode for the all-solid-state battery, or based on the total weight of the positive electrode active material layer. Within the above content range, the conductive material can improve electrical conductivity without degrading battery performance.

[0101] When the positive electrode active material layer further includes a conductive material, the positive electrode active material layer may include 45 wt% to 99.25 wt% of the positive electrode active material, 0.5 wt% to 35 wt% of the sulfide-based solid electrolyte, 0.1 wt% to 10 wt% of the fluorine-based resin binder, 0.05 wt% to 5 wt% of the vanadium oxide, and 0.1 wt% to 5 wt% of the conductive material, based on 100 wt% of the positive electrode active material layer.

[0102] Meanwhile, the positive electrode for the lithium secondary battery may further include an oxide-based inorganic solid electrolyte in addition to the above-described solid electrolyte. The oxide-based inorganic solid electrolyte may be, for example, Li 1+x Ti 2-x Al(PO4)3(LTAP)(0≤x≤4), Li 1+x+y Al x Ti 2-x Si y P 3-y O 12 (0 <x<2, 0≤y<3), BaTiO3, Pb(Zr,Ti)O3(PZT), Pb 1-x La x Zr 1-y Ti y O3(PLZT)(0≤x<1, 0≤y<1), PB(Mg3Nb 2 / 3 )O3-PbTiO3(PMN-PT), HfO2, SrTiO3, SnO2, CeO2, Na2O, MgO, NiO, CaO, BaO, ZnO, ZrO2, Y2O3, Al2O3, TiO2, SiO2, lithium phosphate (Li3PO4), lithium titanium phosphate (Li x Ti y(PO4)3, 0 <x<2, 0<y<3), Li 1+x+y (Al, Ga) x (Ti, Ge) 2-x Si y P 3-y O 12 (0≤x≤1, 0≤y≤1), lithium lanthanum titanate (Li x La y TiO3, 0 <x<2, 0<y<3), Li2O, LiAlO2, Li2O-Al2O3-SiO2-P2O5-TiO2-GeO2계 세라믹스, 가넷(Garnet)계 세라믹스 Li 3+x La3M2O 12 (M= Te, Nb, or Zr; x is an integer from 1 to 10), or a combination thereof.

[0103] All-solid-state secondary battery

[0104] In one embodiment, an all-solid-state secondary battery is provided, which includes the aforementioned positive electrode, negative electrode, and a solid electrolyte layer positioned between the positive electrode and negative electrode. The all-solid-state secondary battery may also be referred to as an all-solid-state battery or an all-solid-state lithium secondary battery.

[0105] Figure 1 is a cross-sectional view of an all-solid-state battery.

[0106] Referring to FIG. 1, the all-solid-state battery (SB) may have a structure in which an electrode assembly in which a negative electrode (40) including a negative electrode current collecting layer (41) and a negative electrode active material layer (43), a solid electrolyte layer (30), and a positive electrode (20) including a positive electrode active material layer (23) and a positive electrode current collecting layer (21) are laminated is housed in a case such as a pouch. The all-solid-state battery (SB) may further include an elastic layer (50) on the outer side of at least one of the positive electrode (20) and the negative electrode (40). Although FIG. 1 illustrates one electrode assembly including a negative electrode (40), a solid electrolyte layer (30), and a positive electrode (20), an all-solid-state battery may be manufactured by laminating two or more electrode assemblies.

[0107] cathode

[0108] An anode for an all-solid-state battery may include, for example, a current collecting layer and a negative electrode active material layer positioned on the current collecting layer. The negative electrode active material layer includes a negative electrode active material and may further include a binder, a conductive material, and / or a solid electrolyte.

[0109] The negative active material may include a material capable of reversibly intercalating / deintercalating lithium ions, lithium metal, an alloy of lithium metal, a material capable of doping and dedoping lithium, or a transition metal oxide.

[0110] Materials capable of reversibly intercalating / deintercalating lithium ions include carbon-based negative electrode active materials, such as crystalline carbon, amorphous carbon, or a combination thereof. Examples of crystalline carbon include graphite, such as natural graphite or artificial graphite in an amorphous, plate-like, flake-like, spherical, or fibrous form, and examples of amorphous carbon include soft carbon or hard carbon, mesophase pitch carbide, and calcined coke.

[0111] As an alloy of lithium metal, an alloy of lithium with one or more metals selected from Na, K, Rb, Cs, Fr, Be, Mg, Ca, Sr, Si, Sb, Pb, In, Zn, Ba, Ra, Ge, Al, and Sn can be used.

[0112] As a material that can be doped and dedoped with lithium, a Si-based negative electrode active material or a Sn-based negative electrode active material can be used, and as a Si-based negative electrode active material, silicon, silicon-carbon composite, SiO x(0<x≤2), Si-Q 합금(Q는 알칼리 금속, 알칼리 토금속, 13족 원소, 14족 원소, 15족 원소, 16족 원소, 전이금속, 희토류 원소 및 이들의 조합으로 이루어진 군에서 선택되는 원소이며, Si은 아님), Sn계 음극 활물질로는 Sn, SnO2, Sn-R 합금(R은 알칼리 금속, 알칼리 토금속, 13족 원소, 14족 원소, 15족 원소, 16족 원소, 전이금속, 희토류 원소 및 이들의 조합으로 이루어진 군에서 선택되는 원소이며, Sn은 아님) 등을 들 수 있고, 또한 이들 중 적어도 하나와 SiO2를 혼합하여 사용할 수도 있다. 원소 Q 및 R로는 Mg, Ca, Sr, Ba, Ra, Sc, Y, Ti, Zr, Hf, Rf, V, Nb, Ta, Db, Cr, Mo, W, Sg, Tc, Re, Bh, Fe, Pb, Ru, Os, Hs, Rh, Ir, Pd, Pt, Cu, Ag, Au, Zn, Cd, B, Al, Ga, Sn, In, Tl, Ge, P, As, Sb, Bi, S, Se, Te, Po, 및 이들의 조합으로 이루어진 군에서 선택되는 것을 사용할 수 있다.

[0113] The silicon-carbon composite may be, for example, a silicon-carbon composite including a core comprising crystalline carbon and silicon particles and an amorphous carbon coating layer positioned on the surface of the core. The crystalline carbon may be artificial graphite, natural graphite, or a combination thereof. As the amorphous carbon precursor, coal pitch, mesophase pitch, petroleum pitch, coal oil, petroleum heavy oil, or a polymer resin such as a phenol resin, a furan resin, or a polyimide resin may be used. At this time, the content of silicon may be 10 wt% to 50 wt% with respect to the total weight of the silicon-carbon composite. In addition, the content of the crystalline carbon may be 10 wt% to 70 wt% with respect to the total weight of the silicon-carbon composite, and the content of the amorphous carbon may be 20 wt% to 40 wt% with respect to the total weight of the silicon-carbon composite. In addition, the thickness of the amorphous carbon coating layer may be 5 nm to 100 nm.

[0114] The average particle diameter (D50) of the silicon particles may be 10 nm to 20 μm, for example, 10 nm to 500 nm. The silicon particles may exist in an oxidized form, and in this case, the atomic content ratio of Si:O in the silicon particles, which indicates the degree of oxidation, may be 99:1 to 33:67. The silicon particles are SiO x It can be a particle, in which case SiO x In the range of x, it can be greater than 0 and less than or equal to 2. Here, the average particle diameter (D50) is measured by a particle size analyzer using laser diffraction and means the diameter of particles having a cumulative volume of 50% by volume in the particle size distribution.

[0115] The Si-based negative electrode active material or Sn-based negative electrode active material can be used in combination with a carbon-based negative electrode active material. The mixing ratio of the Si-based negative electrode active material or Sn-based negative electrode active material and the carbon-based negative electrode active material can be 1:99 to 90:10 by weight.

[0116] The content of the negative active material in the negative active material layer may be 95 wt% to 99 wt% with respect to the total weight of the negative active material layer.

[0117] In one embodiment, the negative electrode active material layer further includes a binder and may optionally further include a conductive material. The content of the binder in the negative electrode active material layer may be 1 wt% to 5 wt% based on the total weight of the negative electrode active material layer. In addition, when the negative electrode active material layer further includes a conductive material, the negative electrode active material layer may include 90 wt% to 98 wt% of the negative electrode active material, 1 wt% to 5 wt% of the binder, and 1 wt% to 5 wt% of the conductive material.

[0118] The above binder serves to adhere the negative electrode active material particles well to each other and also to adhere the negative electrode active material well to the current collecting layer. The binder may include an insoluble binder, a water-soluble binder, or a combination thereof.

[0119] The above-described non-aqueous binder may include, for example, polyvinyl chloride, carboxylated polyvinyl chloride, polyvinyl fluoride, a polymer comprising ethylene oxide, an ethylene propylene copolymer, polystyrene, polyvinylpyrrolidone, polyurethane, polytetrafluoroethylene, polyvinylidene fluoride, polyethylene, polypropylene, polyamideimide, polyimide, or a combination thereof.

[0120] The water-soluble binder may be a rubber-based binder or a polymer resin binder. The rubber-based binder may be selected from styrene-butadiene rubber, acrylated styrene-butadiene rubber, acrylonitrile-butadiene rubber, acrylic rubber, butyl rubber, fluororubber, and combinations thereof. The polymer resin binder may be selected from polyethylene oxide, polyvinylpyrrolidone, polyepichlorohydrin, polyphosphazene, polyacrylonitrile, ethylene propylene diene copolymer, polyvinylpyridine, chlorosulfonated polyethylene, latex, polyester resin, acrylic resin, phenol resin, epoxy resin, polyvinyl alcohol, and combinations thereof.

[0121] When a water-soluble binder is used as the negative electrode binder, a thickener capable of imparting viscosity may be used together, and the thickener may include, for example, a cellulose-based compound. The cellulose-based compound may include carboxymethyl cellulose, hydroxypropylmethyl cellulose, methyl cellulose, an alkali metal salt thereof, or a combination thereof. Na, K, or Li may be used as the alkali metal. The amount of the thickener used may be 0.1 to 3 parts by weight based on 100 parts by weight of the negative electrode active material.

[0122] The conductive material is used to provide conductivity to the electrode, and may include, for example, carbon-based materials such as natural graphite, artificial graphite, carbon black, acetylene black, Ketjen black, carbon fibers, and carbon nanotubes; metal-based materials in the form of metal powder or metal fibers, including copper, nickel, aluminum, and silver; conductive polymers such as polyphenylene derivatives; or mixtures thereof.

[0123] The cathode current collecting layer may be selected from copper foil, nickel foil, stainless steel foil, titanium foil, nickel foam, copper foam, a polymer substrate coated with a conductive metal, and a combination thereof.

[0124] As another example, the negative electrode for the all-solid-state battery may be a precipitation-type negative electrode. The precipitation-type negative electrode refers to a negative electrode that does not include a negative electrode active material when the battery is assembled, but in which lithium metal or the like is precipitated when the battery is charged, and this acts as a negative electrode active material.

[0125] Figure 2 is a cross-sectional view of an all-solid-state battery including a precipitated negative electrode.

[0126] Referring to FIG. 2, the precipitation-type negative electrode (40') of the all-solid-state battery (SB) may include a current collecting layer (41) and a negative electrode coating layer (45) positioned on the current collecting layer (41). The all-solid-state battery having such a precipitation-type negative electrode (40') starts initial charging in a state in which no negative electrode active material is present, and when charging, high-density lithium metal or the like is precipitated between the current collecting layer (41) and the negative electrode coating layer (45) to form a lithium metal layer (44), which may function as the negative electrode active material. Accordingly, in the all-solid-state battery that has been charged more than once, the precipitation-type negative electrode (40') may include a current collecting layer (41), a lithium metal layer (44) positioned on the current collecting layer (41), and a negative electrode coating layer (45) positioned on the metal layer. The lithium metal layer (44) refers to a layer in which lithium metal, etc. is precipitated during the charging process of the battery, and may be referred to as a metal layer or a negative electrode active material layer.

[0127] The cathode coating layer (45) may include a metal, carbon material, or a combination thereof that acts as a catalyst.

[0128] The metal may include, for example, gold, platinum, palladium, silicon, silver, aluminum, bismuth, tin, zinc, or a combination thereof, and may be composed of one of these or an alloy of several types. When the metal is present in the form of particles, the average particle diameter (D50) may be about 4 μm or less, for example, 10 nm to 4 μm.

[0129] The carbon material may be, for example, crystalline carbon, amorphous carbon, or a combination thereof. The crystalline carbon may be, for example, natural graphite, artificial graphite, mesophase carbon microbeads, or a combination thereof. The amorphous carbon may be, for example, carbon black, activated carbon, acetylene black, Denka black, Ketjen black, or a combination thereof.

[0130] When the cathode coating layer (45) includes both metal and carbon material, the mixing ratio of the metal and carbon material may be, for example, a weight ratio of 1:10 to 2:1. In this case, the precipitation of lithium metal can be effectively promoted and the characteristics of the all-solid-state battery can be improved. The cathode coating layer (45) may include, for example, a carbon material supported with a catalytic metal, or may include a mixture of metal particles and carbon material particles.

[0131] The cathode coating layer (45) may include, for example, a metal and amorphous carbon, in which case the precipitation of lithium metal can be effectively promoted.

[0132] The cathode coating layer (45) may further include a binder, and the binder may be a conductive binder. In addition, the cathode coating layer (45) may further include general additives such as fillers, dispersants, and ionic conductive agents.

[0133] The thickness of the cathode coating layer (45) may be, for example, 100 nm to 20 ㎛, or 500 nm to 10 ㎛, or 1 ㎛ to 5 ㎛.

[0134] The precipitation-type negative electrode (40') may further include, for example, a thin film on the surface of the current collecting layer (41), that is, between the current collecting layer (41) and the negative electrode coating layer (45). The thin film may include an element capable of forming an alloy with lithium. The element capable of forming an alloy with lithium may be, for example, gold, silver, zinc, tin, indium, silicon, aluminum, bismuth, etc., and may be composed of one type thereof or may be composed of multiple types of alloys. The thin film may further flatten the precipitation form of the lithium metal layer (44) and further improve the characteristics of the all-solid-state battery. The thin film may be formed by, for example, a vacuum deposition method, a sputtering method, a plating method, etc. The thickness of the thin film may be, for example, 1 nm to 500 nm.

[0135] solid electrolyte layer

[0136] The solid electrolyte layer (30) may include a sulfide-based solid electrolyte, an oxide-based solid electrolyte, etc. The specific details of the sulfide-based solid electrolyte and the oxide-based solid electrolyte are as described above.

[0137] In one example, the solid electrolyte included in the positive electrode (20) and the solid electrolyte included in the solid electrolyte layer (30) may include the same compound or different compounds. For example, when both the positive electrode (20) and the solid electrolyte layer (30) include an argyrodite-type sulfide-based solid electrolyte, the overall performance of the all-solid-state secondary battery may be improved. In addition, for example, when both the positive electrode (20) and the solid electrolyte layer (30) include the above-described coated solid electrolyte, the all-solid-state secondary battery may implement high capacity and high energy density while implementing excellent initial efficiency and lifespan characteristics.

[0138] Meanwhile, the average particle diameter (D50) of the solid electrolyte included in the positive electrode (20) may be smaller than the average particle diameter (D50) of the solid electrolyte included in the solid electrolyte layer (30). In this case, the energy density of the all-solid-state battery can be maximized while increasing the mobility of lithium ions, thereby improving the overall performance. For example, the average particle diameter (D50) of the solid electrolyte included in the positive electrode (20) may be 0.1 ㎛ to 1.0 ㎛, or 0.1 ㎛ to 0.8 ㎛, and the average particle diameter (D50) of the solid electrolyte included in the solid electrolyte layer (30) may be 1.5 ㎛ to 5.0 ㎛, or 2.0 ㎛ to 4.0 ㎛, or 2.5 ㎛ to 3.5 ㎛. When this particle size range is satisfied, the energy density of the all-solid-state secondary battery can be maximized while lithium ion transport is facilitated, resistance is suppressed, and the overall performance of the all-solid-state secondary battery can be improved. Here, the average particle diameter (D50) of the solid electrolyte can be measured using a particle size analyzer using laser diffraction. Alternatively, the particle size can be measured by selecting 20 or so random particles from a microscope image such as a scanning electron microscope, obtaining a particle size distribution, and calculating the D50 value from this.

[0139] The solid electrolyte layer may further include a binder in addition to the solid electrolyte. The binder may include, but is not limited to, styrene butadiene rubber, polytetrafluoroethylene, polyvinylidene fluoride, polyethylene, an acrylate polymer, or a combination thereof, and any binder used in the art may be used. The acrylate polymer may be, for example, butyl acrylate, polyacrylate, polymethacrylate, or a combination thereof.

[0140] A solid electrolyte layer can be formed by adding a solid electrolyte to a binder solution, coating the solution on a substrate film, and drying the solution. The solvent for the binder solution may be isobutyryl isobutyrate, xylene, toluene, benzene, hexane, or a combination thereof. The solid electrolyte layer formation process is widely known in the art, so a detailed description will be omitted.

[0141] The thickness of the solid electrolyte layer may be, for example, 10 μm to 150 μm.

[0142] The solid electrolyte layer may further include an alkali metal salt, and / or an ionic liquid, and / or a conductive polymer.

[0143] The alkali metal salt may be, for example, a lithium salt. The content of the lithium salt in the solid electrolyte layer may be 1 M or more, for example, 1 M to 4 M. In this case, the lithium salt may improve ionic conductivity by enhancing the mobility of lithium ions in the solid electrolyte layer.

[0144] Lithium salts include, for example, LiSCN, LiN(CN)2, Li(CF3SO2)3C, LiC4F9SO3, LiN(SO2CF2CF3)2, LiCl, LiF, LiBr, LiI, LiB(C2O4)2, LiBF4, LiBF3(C2F5), lithium bis(oxalato)borate (LiBOB), lithium oxalyldifluoroborate (LIODFB), lithium difluoro(oxalato)borate (LiDFOB), lithium bis(trifluoro methanesulfonyl)imide (LiTFSI, LiN(SO2CF3)2), lithium bis(fluorosulfonyl)imide (LiFSI, It may include LiN(SO2F)2), LiCF3SO3, LiAsF6, LiSbF6, LiClO4 or mixtures thereof.

[0145] Additionally, the lithium salt may be an imide type, for example, the imide type lithium salt may include lithium bis(trifluoro methanesulfonyl)imide (LiTFSI, LiN(SO2CF3)2), lithium bis(fluorosulfonyl)imide (LiFSI, LiN(SO2F)2). The lithium salt may maintain or improve ionic conductivity by appropriately maintaining chemical reactivity with the ionic liquid.

[0146] Ionic liquids are salts or molten salts that are composed only of ions and are liquid at room temperature, with a melting point below room temperature.

[0147] The ionic liquid may be a compound comprising a) one or more cations selected from ammonium-based, pyrrolidinium-based, pyridinium-based, pyrimidinium-based, imidazolium-based, piperidinium-based, pyrazolium-based, oxazolium-based, pyridazinium-based, phosphonium-based, sulfonium-based, triazolium-based, and mixtures thereof, and b) one or more anions selected from BF4-, PF6-, AsF6-, SbF6-, AlCl4-, HSO4-, ClO4-, CH3SO3-, CF3CO2-, Cl-, Br-, I-, BF4-, SO4-, CF3SO3-, (FSO2)2N-, (C2F5SO2)2N-, (C2F5SO2)(CF3SO2)N-, and (CF3SO2)2N-.

[0148] The ionic liquid may be, for example, one or more selected from the group consisting of N-methyl-N-propylpyrrolidinium bis(trifluoromethanesulfonyl)imide, N-butyl-N-methylpyrrolidinium bis(3-trifluoromethylsulfonyl)imide, 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)amide, and 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)amide.

[0149] In the solid electrolyte layer, the weight ratio of the solid electrolyte and the ionic liquid may be 0.1:99.9 to 90:10, for example, 10:90 to 90:10, 20:80 to 90:10, 30:70 to 90:10, 40:60 to 90:10, or 50:50 to 90:10. A solid electrolyte layer satisfying the above range can maintain or improve ionic conductivity by improving the electrochemical contact area with the electrode. Accordingly, the energy density, discharge capacity, rate characteristics, etc. of the all-solid-state battery can be improved.

[0150] The all-solid-state battery may be a unit cell having a structure of anode / solid electrolyte layer / cathode, a bi-cell having a structure of cathode / solid electrolyte layer / cathode / solid electrolyte layer / cathode, or a laminated battery in which the structure of the unit cell is repeated.

[0151] The shape of the all-solid-state battery is not particularly limited, and may be, for example, coin-shaped, button-shaped, sheet-shaped, stacked, cylindrical, or flat. Furthermore, all-solid-state batteries can be applied to large-scale batteries used in electric vehicles, for example. For example, all-solid-state batteries can be used in hybrid vehicles such as plug-in hybrid electric vehicles (PHEVs). Furthermore, they can be used in fields requiring large amounts of power storage, such as electric bicycles or power tools.

[0152] Hereinafter, an all-solid-state secondary battery temperature measuring device according to an embodiment will be described with reference to FIGS. 3 to 7. The all-solid-state secondary battery temperature measuring device according to an embodiment can measure the temperature and voltage inside an all-solid-state secondary battery (SB) capable of being charged and discharged. Hereinafter, the positive electrode of the all-solid-state secondary battery (SB) may include a cathode, and the negative electrode may include an anode, but is not limited thereto.

[0153] Fig. 3 is a perspective view illustrating an all-solid-state secondary battery temperature measuring device according to one embodiment of measuring the temperature and voltage inside an all-solid-state secondary battery. Fig. 4 is a side view illustrating an all-solid-state secondary battery temperature measuring device according to one embodiment of measuring the temperature and voltage inside an all-solid-state secondary battery.

[0154] Referring to FIGS. 3 and 4, there are a plurality of all-solid-state secondary battery temperature measuring devices (1000) according to one embodiment, and each of the plurality of all-solid-state secondary battery temperature measuring devices (1000) can contact each of the first electrode tab (30) and the second electrode tab (40) of the all-solid-state secondary battery (SB) to measure the temperature and voltage inside the all-solid-state secondary battery (SB) when the all-solid-state secondary battery (SB) is charged and discharged.

[0155] Each of the plurality of all-solid-state secondary battery temperature measuring devices (1000) can induce the all-solid-state secondary battery (SB) into a charging or discharging state by applying a current to each of the first electrode tab (30) and the second electrode tab (40) of the all-solid-state secondary battery (SB). Each of the plurality of all-solid-state secondary battery temperature measuring devices (1000) can measure the temperature and voltage inside the all-solid-state secondary battery (SB) by measuring the temperature and voltage measured from each of the first electrode tab (30) and the second electrode tab (40) of the all-solid-state secondary battery (SB).

[0156] Figure 5 is a cross-sectional view of an all-solid-state secondary battery taken along line V-V of Figure 3.

[0157] Referring to FIG. 5 and FIG. 3, an all-solid-state secondary battery (SB) according to an example includes an all-solid-state electrode assembly (10), a pouch (20), a first electrode tab (30), a second electrode tab (40), a pressurizing jig (50), a first elastic layer (60), and a second elastic layer (70).

[0158] The all-solid-state electrode assembly (10) is housed inside a pouch (20). The all-solid-state electrode assembly (10) includes a first electrode (11), a second electrode (12), and a solid electrolyte layer (13).

[0159] The first electrode (11) may include, but is not limited to, the negative electrode included in the above-described all-solid-state secondary battery. The first electrode (11) may have a plate or foil shape, but is not limited thereto.

[0160] The second electrode (12) is positioned on the first electrode (11) with a solid electrolyte layer (13) therebetween. The second electrode (12) may include, but is not limited to, the positive electrode included in the aforementioned all-solid-state secondary battery. The second electrode (12) may have a plate or foil shape, but is not limited thereto.

[0161] The solid electrolyte layer (13) is positioned between the first electrode (11) and the second electrode (12). The solid electrolyte layer (13) may include, but is not limited to, the solid electrolyte layer included in the above-described all-solid-state secondary battery. The solid electrolyte layer (13) may have a layer form between the first electrode (11) and the second electrode (12), but is not limited thereto.

[0162] The all-solid-state electrode assembly (10) may have various known laminated structures. For example, the all-solid-state electrode assembly (10) may have a unit cell having a structure of anode / solid electrolyte layer / cathode, a bi-cell having a structure of cathode / solid electrolyte layer / cathode / solid electrolyte layer / cathode, or a laminated cell structure in which the structure of the unit cells is repeated, but is not limited thereto.

[0163] The all-solid-state electrode assembly (10) may include a plurality of stacked all-solid-state electrode assemblies (10). For example, various known elastic layers may be positioned between the plurality of all-solid-state electrode assemblies (10) stacked in one direction.

[0164] The pouch (20) stores the all-solid-state electrode assembly (10) in its internal space. The pouch (20) has a square shape in plan, but is not limited thereto, and may have a polygonal shape such as a triangle, a pentagon, a hexagon, a heptagon, an octagon, a circle, an oval, or a loop shape in plan.

[0165] The first electrode tab (30) protrudes from the first electrode (11) of the all-solid-state electrode assembly (10) through the pouch (20) and out of the pouch (20). The first electrode tab (30) may be integral with the first electrode (11) of the all-solid-state electrode assembly (10), but is not limited thereto and may include various known conductive tabs connected to the first electrode (11) of the all-solid-state electrode assembly (10). By connecting the first electrode tab (30) to the first electrode (11) of the all-solid-state electrode assembly (10), the temperature and voltage inside the all-solid-state secondary battery (SB) can be measured by the all-solid-state secondary battery temperature measuring device according to one embodiment through the first electrode tab (30).

[0166] The first electrode tab (30) is positioned adjacent to the second electrode tab (40), but is not limited thereto.

[0167] For example, the first electrode tab (30) is positioned adjacent to the second electrode tab (40) at one end of the all-solid-state electrode assembly (10), but is not limited thereto, and the first electrode tab (30) may be positioned spaced apart from the second electrode tab (40) at the other end of the all-solid-state electrode assembly (10) with the all-solid-state electrode assembly (10) therebetween.

[0168] As another example, the first electrode tab (30) may protrude from the first electrode (11) of the solid-state electrode assembly (10) through the pouch (20) and out of the pouch (20) at various known locations in the solid-state electrode assembly (10), regardless of the location of the second electrode tab (40).

[0169] The second electrode tab (40) is spaced apart from the first electrode tab (30) and protrudes from the second electrode (12) of the all-solid-state electrode assembly (10) through the pouch (20) to the outside of the pouch (20). The second electrode tab (40) may be integral with the second electrode (12) of the all-solid-state electrode assembly (10), but is not limited thereto and may include various known conductive tabs connected to the second electrode (12) of the all-solid-state electrode assembly (10). By connecting the second electrode tab (40) to the second electrode (12) of the all-solid-state electrode assembly (10), the temperature and voltage inside the all-solid-state secondary battery (SB) can be measured by the all-solid-state secondary battery temperature measuring device according to one embodiment through the second electrode tab (40).

[0170] The second electrode tab (40) is positioned adjacent to the first electrode tab (30), but is not limited thereto.

[0171] For example, the second electrode tab (40) is positioned adjacent to the first electrode tab (30) at one end of the all-solid-state electrode assembly (10), but is not limited thereto, and the second electrode tab (40) may be positioned spaced apart from the first electrode tab (30) at the other end of the all-solid-state electrode assembly (10) with the all-solid-state electrode assembly (10) therebetween.

[0172] As another example, the second electrode tab (40) may protrude from the second electrode (12) of the solid-state electrode assembly (10) through the pouch (20) and out of the pouch (20) at various known locations in the solid-state electrode assembly (10), regardless of the location of the first electrode tab (30).

[0173] The pressurizing jig (50) pressurizes the front surface and the rear surface of the pouch (20). The pressurizing jig (50) pressurizes the front surface and the rear surface of the pouch (20) to apply pressure to the all-solid-state electrode assembly (10) located inside the pouch (20). The battery efficiency of the all-solid-state electrode assembly (10) can be improved by the pressurizing jig (50). The pressurizing jig (50) can have various known jig shapes capable of pressing the pouch (20).

[0174] The first elastic layer (60) is located between the front surface of the pouch (20) and the pressurizing jig (50). The first elastic layer (60) can disperse the pressure of the pressurizing jig (50) applied to the pouch (20) and simultaneously prevent the pouch (20) from being damaged by the pressure of the pressurizing jig (50). The first elastic layer (60) includes various known elastic layers.

[0175] The second elastic layer (70) is located between the back surface of the pouch (20) and the pressurizing jig (50). The second elastic layer (70) can disperse the pressure of the pressurizing jig (50) applied to the pouch (20) and simultaneously prevent the pouch (20) from being damaged by the pressure of the pressurizing jig (50). The second elastic layer (70) includes various known elastic layers.

[0176] Hereinafter, an all-solid-state secondary battery temperature measuring device (1000) according to one embodiment that comes into contact with a first electrode tab (30) of an all-solid-state secondary battery (SB) is described as an example, but is not limited thereto, and an all-solid-state secondary battery temperature measuring device (1000) according to one embodiment can come into contact with a second electrode tab (40) of an all-solid-state secondary battery (SB).

[0177] Fig. 6 is a perspective view showing an all-solid-state secondary battery temperature measuring device according to one embodiment.

[0178] Referring to FIG. 6, FIG. 3, and FIG. 4, an all-solid-state secondary battery temperature measuring device (1000) according to one embodiment includes a mounting portion (100), a pressurizing portion (200), a wire (300), a temperature sensor (400), an elastic hinge (500), a fixing portion (600), and a control portion (800).

[0179] The mounting portion (100) pressurizes and fixes the first electrode tab (30) of the all-solid-state secondary battery (SB) together with the pressing portion (200). The first electrode tab (30) of the all-solid-state secondary battery (SB) is mounted on the mounting portion (100). The mounting portion (100) may contact the rear surface of the first electrode tab (30) of the all-solid-state secondary battery (SB), but is not limited thereto. The mounting portion (100) may include a protruding structure protruding toward the pressing portion (200) corresponding to the portion where the first electrode tab (30) is mounted, but is not limited thereto. For example, the mounting portion (100) may include a protruding structure protruding toward the pressing portion (200) and having grooves in the form of protrusions formed on the surface, but is not limited thereto. The fixing portion (100) may be formed in a clamp shape or a forceps shape together with the pressurizing portion (200), but is not limited thereto.

[0180] The pressing portion (200) presses and fixes the first electrode tab (30) of the all-solid-state secondary battery (SB) together with the mounting portion (100). The pressing portion (200) is located on the mounting portion (100). The pressing portion (200) presses the mounting portion (100) with the first electrode tab (30) of the all-solid-state secondary battery (SB) interposed therebetween, thereby fixing the first electrode tab (30) together with the mounting portion (100). The pressing portion (200) may contact the front surface of the first electrode tab (30) of the all-solid-state secondary battery (SB), but is not limited thereto. The pressing portion (200) may include a protruding structure protruding toward the mounting portion (100) corresponding to a portion for pressing the first electrode tab (30), but is not limited thereto. For example, the pressurizing portion (200) may include a protruding structure that protrudes toward the mounting portion (100) and has grooves formed in the form of protrusions on the surface, but is not limited thereto. The pressurizing portion (200) may form a tongs shape or a clamp shape together with the mounting portion (100), but is not limited thereto.

[0181] The pressurizing unit (200) includes a first sub-pressurizing unit (210) and a second sub-pressurizing unit (220) that are adjacent to each other and connected.

[0182] The first sub-pressurizing unit (210) includes a conductor that is in contact with the first electrode tab (30). The conductor included in the first sub-pressurizing unit (210) is connected to a wire (300) and is in contact with the first electrode tab (30). The conductor included in the first sub-pressurizing unit (210) may include various known conductive materials. The wire (300) is mounted on the first sub-pressurizing unit (210). The first sub-pressurizing unit (210) includes a wire connection portion (211) to which the wire (300) is connected and a tab contact portion (212) that is connected to the wire connection portion (211) and is in contact with the first electrode tab (30).

[0183] The wire connection portion (211) may include various known wire connection means to which the wire (300) is connected. By connecting the wire (300) to the wire connection portion (211), the wire (300) is electrically connected to the first electrode tab (30) via the first sub-pressure portion (210).

[0184] The tab contact portion (212) is located inside the first sub-pressure portion (210) and electrically connects the first electrode tab (30) in contact with the first sub-pressure portion (210) and the wire connection portion (211). The tab contact portion (212) may include various known conductive contact means. Since the tab contact portion (212) of the first sub-pressure portion (210) is in contact with the first electrode tab (30) and the wire (300) is connected to the wire connection portion (211) connected to the tab contact portion (212), the wire (300) can be electrically connected to the first electrode tab (30) through the first sub-pressure portion (210) in contact with the first electrode tab (30).

[0185] The first sub-pressure part (210) is coupled to the second sub-pressure part (220) and can be rotated simultaneously with the second sub-pressure part (220) by an elastic hinge (500) to come into contact with the first electrode tab (30), but is not limited thereto.

[0186] Fig. 7 is a perspective view showing the back surface of the second sub-pressurizing section of the pressurizing section of the all-solid-state secondary battery temperature measuring device according to one embodiment.

[0187] Referring to FIGS. 6 and 7, the second sub-pressurizing unit (220) includes an insulator that is coupled to the first sub-pressurizing unit (210) and comes into contact with the first electrode tab (30). The insulator included in the second sub-pressurizing unit (220) is connected to a temperature sensor (400) and comes into contact with the first electrode tab (30). The insulator included in the second sub-pressurizing unit (220) may include various known insulating materials. The temperature sensor (400) is mounted in the second sub-pressurizing unit (220). The second sub-pressurizing unit (220) includes a through-hole (221) in which the temperature sensor (400) is supported. For example, the temperature sensor (400) may extend along the side surface of the second sub-pressurizing unit (220) and pass through the through-hole (221) of the second sub-pressurizing unit (220) to come into contact with the first electrode tab (30), but is not limited thereto. As another example, the temperature sensor (400) can be mounted on the second sub-pressurizing portion (220) using various known coupling means and brought into contact with the first electrode tab (30).

[0188] Since the temperature sensor (400) is mounted on the second sub-pressurizing unit (220), when the second sub-pressurizing unit (220) comes into contact with the first electrode tab (30), the temperature sensor (400) also comes into contact with the first electrode tab (30).

[0189] Since the second sub-pressurizing unit (220) includes a non-conductor, even if the second sub-pressurizing unit (220) is connected to the first sub-pressurizing unit (210) including a conductor, the wire (300) connected to the first sub-pressurizing unit (210) and the temperature sensor (400) mounted on the second sub-pressurizing unit (220) do not short-circuit each other (shirt circuit).

[0190] The second sub-pressure unit (220) is coupled to the first sub-pressure unit (210) and can be rotated simultaneously with the first sub-pressure unit (210) by an elastic hinge (500) to come into contact with the first electrode tab (30), but is not limited thereto.

[0191] Referring to FIGS. 3, 4, and 6, a wire (300) is electrically connected to a first electrode tab (30) positioned between a mounting portion (100) and a pressing portion (200). The wire (300) is connected to a wire connection portion (211) of a first sub-pressuring portion (210) and can be electrically connected to the first electrode tab (30) through a pressing portion (200) that presses and fixes the first electrode tab (30) together with the mounting portion (100). The wire (300) is connected to a control portion (800). The wire (300) can apply current from the control portion (800) to the first electrode tab (30) to induce the all-solid-state secondary battery (SB) into a charging or discharging state, and at the same time, measure the voltage inside the all-solid-state secondary battery (SB) through the first electrode tab (30). The wire (300) may include various known current applying means and various known voltage measuring means. The wire (300) may include a heat-resistant material. For example, the wire (300) may include a wire coated with various known heat-resistant resins, such as polytetrafluoroethylene, but is not limited thereto. By including the heat-resistant material in the wire (300), damage to the wire (300) due to the heat of the first electrode tab (30) can be suppressed.

[0192] The temperature sensor (400) is in contact with the first electrode tab (30) located between the mounting portion (100) and the pressing portion (200). The temperature sensor (400) is mounted on the second sub-pressuring portion (220) and is supported by the pressing portion (200) that pressurizes and fixes the first electrode tab (30) together with the mounting portion (100) so that the temperature sensor (400) can be in contact with the first electrode tab (30). The temperature sensor (400) is connected to the control portion (800). When the wire (300) applies current from the control portion (800) to the first electrode tab (30) to induce the all-solid-state secondary battery (SB) into a charging or discharging state, the temperature sensor (400) can measure the temperature of the first electrode tab (30) caused by heat conducted from the inside of the all-solid-state secondary battery (SB) to the first electrode tab (30), thereby measuring the temperature inside the all-solid-state secondary battery (SB). The temperature of the first electrode tab (30) measured by the temperature sensor (400) may be transmitted to the control unit (800) and displayed externally, but is not limited thereto. The temperature sensor (400) may include various known temperature sensing means. For example, the temperature sensor (400) may include various known thermocouples utilizing the Seebeck effect, but is not limited thereto. Since the temperature sensor (400) includes a thermocouple, damage to the temperature sensor (400) due to the heat of the first electrode tab (30) can be suppressed due to the characteristics of the metals included in the thermocouple.

[0193] The elastic hinge (500) connects the mounting portion (100) and the pressurizing portion (200) and can elastically rotate the pressurizing portion (200) with respect to the mounting portion (100). For example, the elastic hinge (500) may include, but is not limited to, various known springs that elastically rotate various known axes connecting the mounting portion (100) and the pressurizing portion (200). As another example, the elastic hinge (500) may utilize the elastic restoring force of the spring to maintain the mounting portion (100) in a pressed state by the pressurizing portion (200), but is not limited thereto. As another example, the elastic hinge (500) may include, but is not limited to, various known rotational means and various known elastic means.

[0194] The fixing part (600) is coupled with the mounting part (100) and fixed to the pressing jig (50) of the all-solid-state secondary battery (SB). A part of the pressing jig (50) may be inserted into the fixing part (600) so that the fixing part (600) is fixed to the pressing jig (50), but is not limited thereto. The fixing part (600) may include a recessed portion into which the pressing jig (50) is inserted, but is not limited thereto. For example, the fixing part (600) may include various known fixing means that can be fixed to the pressing jig (50). By fixing the fixing part (600) to the pressing jig (50), the mounting part (100) and the pressing part (200) coupled to the fixing part (600) can pressurize and fix the first electrode tab (30) in a state in which they are fixed to the pressing jig (50).

[0195] The control unit (800) is connected to a wire (300) and a temperature sensor (400). The control unit (800) applies a current to the first electrode tab (30) through the wire (300) to induce the all-solid-state secondary battery (SB) into a charging or discharging state. The control unit (800) measures the voltage of the first electrode tab (30) through the wire (300) to measure the voltage inside the all-solid-state secondary battery (SB) and at the same time measures the temperature of the first electrode tab (30) through the temperature sensor (400) to measure the temperature inside the all-solid-state secondary battery (SB). The control unit (800) may include, but is not limited to, various known current generating means and voltage measuring means connected to the wire (300), and various known temperature measuring means and temperature display means connected to the temperature sensor (400).

[0196] For example, an all-solid-state secondary battery temperature measuring device (1000) according to one embodiment includes a fixing portion (100) and a pressing portion (200) that pressurize and fix a first electrode tab (30) of an all-solid-state secondary battery (SB), includes a wire (300) that applies current to the first electrode tab (30) to induce the all-solid-state secondary battery (SB) into a charge or discharge state and simultaneously measures a voltage inside the all-solid-state secondary battery (SB) through the first electrode tab (30), and includes a temperature sensor (400) that measures the temperature of the first electrode tab (30) due to heat conducted from the inside of the all-solid-state secondary battery (SB) induced into a charge or discharge state to the first electrode tab (30) to measure the temperature inside the all-solid-state secondary battery (SB), thereby enabling the temperature and voltage inside the all-solid-state secondary battery (SB) to be measured.

[0197] An all-solid-state secondary battery temperature measuring device (1000) capable of measuring the temperature and voltage inside an all-solid-state secondary battery (SB) can be provided.

[0198] Hereinafter, an all-solid-state secondary battery temperature measuring device according to another embodiment will be described with reference to FIGS. 8 and 9.

[0199] Below, different parts from the solid-state secondary battery temperature measuring device according to the above-described embodiment will be described.

[0200] Fig. 8 is a perspective view illustrating an all-solid-state secondary battery temperature measuring device according to another embodiment. Fig. 9 is a perspective view illustrating an all-solid-state secondary battery temperature measuring device according to another embodiment for measuring the temperature and voltage inside an all-solid-state secondary battery.

[0201] Referring to FIGS. 8 and 9, an all-solid-state secondary battery temperature measuring device (1002) according to another embodiment includes a mounting portion (100), a pressurizing portion (200), a wire (300), a temperature sensor (400), a hinge (700), and a control portion (800).

[0202] The mounting portion (100) pressurizes and fixes the first electrode tab (30) of the all-solid-state secondary battery (SB) together with the pressing portion (200). The first electrode tab (30) of the all-solid-state secondary battery (SB) is mounted on the mounting portion (100). The mounting portion (100) may be in contact with the rear surface of the first electrode tab (30) of the all-solid-state secondary battery (SB), but is not limited thereto. The mounting portion (100) includes a heat-resistant structure (110) positioned corresponding to a portion where the first electrode tab (30) is mounted. For example, the heat-resistant structure (110) may include various known heat-resistant materials such as epoxy glass, but is not limited thereto. A wire (300) and a temperature sensor (400) may be positioned on the heat-resistant structure (110) and may be in contact with the first electrode tab (30).

[0203] The pressing unit (200) presses and fixes the first electrode tab (30) of the all-solid-state secondary battery (SB) together with the mounting unit (100). The pressing unit (200) is located on the mounting unit (100). The pressing unit (200) presses the mounting unit (100) with the first electrode tab (30) of the all-solid-state secondary battery (SB) interposed therebetween, thereby fixing the first electrode tab (30) together with the mounting unit (100). The pressing unit (200) may contact the front surface of the first electrode tab (30) of the all-solid-state secondary battery (SB), but is not limited thereto. The pressing unit (200) may include a cover means for covering the mounting unit (100), but is not limited thereto.

[0204] The wire (300) can be mounted on the mounting portion (100) between the mounting portion (100) and the pressurizing portion (200). The wire (300) is positioned on the heat-resistant structure (110) of the mounting portion (100) and comes into contact with the first electrode tab (30). The wire (300) can come into contact with the first electrode tab (30) fixed between the mounting portion (100) and the pressurizing portion (200) and be electrically connected to the first electrode tab (30). The wire (300) is connected to the control unit (800). The wire (300) can apply current from the control unit (800) to the first electrode tab (30) to induce the all-solid-state secondary battery (SB) into a charging or discharging state, and at the same time, measure the voltage inside the all-solid-state secondary battery (SB) through the first electrode tab (30). The wire (300) may include various known current applying means and various known voltage measuring means. The wire (300) may include a heat-resistant material. For example, the wire (300) may include a wire coated with various known heat-resistant resins, such as polytetrafluoroethylene, but is not limited thereto. By including the heat-resistant material in the wire (300), damage to the wire (300) due to the heat of the first electrode tab (30) can be suppressed.

[0205] A temperature sensor (400) can be mounted on the mounting portion (100) between the mounting portion (100) and the pressurizing portion (200). The temperature sensor (400) is positioned on the heat-resistant structure (110) of the mounting portion (100) and comes into contact with the first electrode tab (30). The temperature sensor (400) can come into contact with the first electrode tab (30) fixed between the mounting portion (100) and the pressurizing portion (200) and measure the temperature of the first electrode tab (30). The temperature sensor (400) is connected to the control portion (800). The temperature sensor (400) can measure the temperature of the first electrode tab (30) caused by heat conducted from the inside of the all-solid-state secondary battery (SB) to the first electrode tab (30) when the wire (300) applies current from the control unit (800) to the first electrode tab (30) to induce the all-solid-state secondary battery (SB) into a charging or discharging state, thereby measuring the temperature inside the all-solid-state secondary battery (SB). The temperature of the first electrode tab (30) measured by the temperature sensor (400) can be transmitted to the control unit (800) and displayed externally, but is not limited thereto. The temperature sensor (400) can include various known temperature sensing means. For example, the temperature sensor (400) can include various known thermocouples utilizing the Seebeck effect, but is not limited thereto. Since the temperature sensor (400) includes a thermocouple, the temperature sensor (400) can be prevented from being damaged by the heat of the first electrode tab (30) due to the characteristics of the metals included in the thermocouple.

[0206] The hinge (700) connects between the mounting portion (100) and the pressurizing portion (200), and can connect between the mounting portion (100) and the pressurizing portion (200) that rotates relative to the mounting portion (100) to cover the mounting portion. The hinge (700) may include various known hinge means, but is not limited thereto.

[0207] The control unit (800) is connected to a wire (300) and a temperature sensor (400). The control unit (800) applies a current to the first electrode tab (30) through the wire (300) to induce the all-solid-state secondary battery (SB) into a charging or discharging state. The control unit (800) measures the voltage of the first electrode tab (30) through the wire (300) to measure the voltage inside the all-solid-state secondary battery (SB) and at the same time measures the temperature of the first electrode tab (30) through the temperature sensor (400) to measure the temperature inside the all-solid-state secondary battery (SB). The control unit (800) may include, but is not limited to, various known current generating means and voltage measuring means connected to the wire (300), and various known temperature measuring means and temperature display means connected to the temperature sensor (400).

[0208] For example, a solid-state secondary battery temperature measuring device (1002) according to another embodiment includes a fixing portion (100) and a pressing portion (200) that pressurize and fix a first electrode tab (30) of an all-solid-state secondary battery (SB), includes a wire (300) that applies current to the first electrode tab (30) to induce the all-solid-state secondary battery (SB) into a charge or discharge state and simultaneously measures a voltage inside the all-solid-state secondary battery (SB) through the first electrode tab (30), and includes a temperature sensor (400) that measures the temperature of the first electrode tab (30) due to heat conducted from the inside of the all-solid-state secondary battery (SB) induced into a charge or discharge state to the first electrode tab (30) to measure the temperature inside the all-solid-state secondary battery (SB), thereby enabling the temperature and voltage inside the all-solid-state secondary battery (SB) to be measured.

[0209] An all-solid-state secondary battery temperature measuring device (1002) capable of measuring the temperature and voltage inside an all-solid-state secondary battery (SB) can be provided.

[0210] Hereinafter, a solid-state secondary battery temperature measuring device according to another embodiment will be described with reference to FIGS. 10 and 11.

[0211] Below, different parts from the solid-state secondary battery temperature measuring device according to the above-described embodiment will be described.

[0212] Fig. 10 is a perspective view illustrating an all-solid-state secondary battery temperature measuring device and an all-solid-state secondary battery according to another embodiment. Fig. 11 is a perspective view illustrating an all-solid-state secondary battery temperature measuring device according to another embodiment for measuring the temperature and voltage inside an all-solid-state secondary battery.

[0213] Referring to FIGS. 10 and 11, an all-solid-state secondary battery temperature measuring device (1003) according to another embodiment includes a mounting portion (100), a pressurizing portion (200), a first wire (301), a first temperature sensor (401), a second wire (302), a second temperature sensor (402), a hinge (700), and a control portion (800).

[0214] The mounting portion (100) pressurizes and fixes the first electrode tab (30) and the second electrode tab (40) of the all-solid-state secondary battery (SB) together with the pressing portion (200). The first electrode tab (30) and the second electrode tab (40) of the all-solid-state secondary battery (SB) are mounted on the mounting portion (100). The mounting portion (100) may contact the rear surface of each of the first electrode tab (30) and the second electrode tab (40) of the all-solid-state secondary battery (SB), but is not limited thereto. The mounting portion (100) includes a heat-resistant structure (110) positioned corresponding to the portions where the first electrode tab (30) and the second electrode tab (40) are mounted. For example, the heat-resistant structure (110) may include various known heat-resistant materials such as epoxy glass, but is not limited thereto. A first wire (301) and a first temperature sensor (401) are positioned on the heat-resistant structure (110) and can be in contact with the first electrode tab (30), and a second wire (302) and a second temperature sensor (402) are positioned and can be in contact with the second electrode tab (40).

[0215] The pressing unit (200) pressurizes and fixes the first electrode tab (30) and the second electrode tab (40) of the all-solid-state secondary battery (SB) together with the mounting unit (100). The pressing unit (200) is located on the mounting unit (100). The pressing unit (200) presses the mounting unit (100) with the first electrode tab (30) and the second electrode tab (40) of the all-solid-state secondary battery (SB) interposed therebetween, thereby fixing the first electrode tab (30) and the second electrode tab (40) together with the mounting unit (100). The pressing unit (200) may contact the front surface of each of the first electrode tab (30) and the second electrode tab (40) of the all-solid-state secondary battery (SB), but is not limited thereto. The pressing unit (200) may include a cover means for covering the mounting unit (100), but is not limited thereto.

[0216] The first wire (301) can be mounted on the mounting portion (100) between the mounting portion (100) and the pressurizing portion (200). The first wire (301) is positioned on the heat-resistant structure (110) of the mounting portion (100) and comes into contact with the first electrode tab (30). The first wire (301) can be electrically connected to the first electrode tab (30) by coming into contact with the first electrode tab (30) fixed between the mounting portion (100) and the pressurizing portion (200). The first wire (301) is connected to the control unit (800). The first wire (301) can apply current from the control unit (800) to the first electrode tab (30) to induce the all-solid-state secondary battery (SB) into a charging or discharging state, and at the same time, measure the voltage inside the all-solid-state secondary battery (SB) through the first electrode tab (30). The first wire (301) may include various known current applying means and various known voltage measuring means. The first wire (301) may include a heat-resistant material. For example, the first wire (301) may include a wire coated with various known heat-resistant resins such as polytetrafluoroethylene, but is not limited thereto. By including the heat-resistant material in the first wire (301), damage to the first wire (301) due to the heat of the first electrode tab (30) can be suppressed.

[0217] The first temperature sensor (401) can be mounted on the mounting portion (100) between the mounting portion (100) and the pressurizing portion (200). The first temperature sensor (401) is located on the heat-resistant structure (110) of the mounting portion (100) and comes into contact with the first electrode tab (30). The first temperature sensor (401) can come into contact with the first electrode tab (30) fixed between the mounting portion (100) and the pressurizing portion (200) and measure the temperature of the first electrode tab (30). The first temperature sensor (401) is connected to the control portion (800). The first temperature sensor (401) can measure the temperature of the first electrode tab (30) caused by heat conducted from the inside of the all-solid-state secondary battery (SB) to the first electrode tab (30) when the first wire (301) applies current from the control unit (800) to the first electrode tab (30) to induce the all-solid-state secondary battery (SB) into a charging or discharging state, thereby measuring the temperature inside the all-solid-state secondary battery (SB). The temperature of the first electrode tab (30) measured by the first temperature sensor (401) can be transmitted to the control unit (800) and displayed externally, but is not limited thereto. The first temperature sensor (401) can include various known temperature sensing means. For example, the first temperature sensor (401) can include various known thermocouples utilizing the Seebeck effect, but is not limited thereto. Since the first temperature sensor (401) includes a thermocouple, the first temperature sensor (401) can be prevented from being damaged by the heat of the first electrode tab (30) due to the characteristics of the metals included in the thermocouple.

[0218] The second wire (302) may include another wire. The second wire (302) may be mounted on the mounting portion (100) between the mounting portion (100) and the pressurizing portion (200). The second wire (302) is positioned on the heat-resistant structure (110) of the mounting portion (100) and is in contact with the second electrode tab (40). The second wire (302) may be in contact with the second electrode tab (40) fixed between the mounting portion (100) and the pressurizing portion (200) and may be electrically connected to the second electrode tab (40). The second wire (302) is connected to the control portion (800). The second wire (302) can induce the all-solid-state secondary battery (SB) into a charging or discharging state by applying a current from the control unit (800) to the second electrode tab (40), and at the same time, measure the voltage inside the all-solid-state secondary battery (SB) through the second electrode tab (40). The second wire (302) can include various known current applying means and various known voltage measuring means. The second wire (302) can include a heat-resistant material. For example, the second wire (302) can include a wire coated with various known heat-resistant resins such as polytetrafluoroethylene, but is not limited thereto. Since the second wire (302) includes a heat-resistant material, damage to the second wire (302) due to the heat of the second electrode tab (40) can be suppressed.

[0219] The second temperature sensor (402) may include another temperature sensor. The second temperature sensor (402) may be mounted on the mounting portion (100) between the mounting portion (100) and the pressurizing portion (200). The second temperature sensor (402) is positioned on the heat-resistant structure (110) of the mounting portion (100) and comes into contact with the second electrode tab (40). The second temperature sensor (402) may come into contact with the second electrode tab (40) fixed between the mounting portion (100) and the pressurizing portion (200) to measure the temperature of the second electrode tab (40). The second temperature sensor (402) is connected to the control unit (800). The second temperature sensor (402) can measure the temperature of the second electrode tab (40) caused by heat conducted from the inside of the all-solid-state secondary battery (SB) to the second electrode tab (40) when the second wire (302) applies current from the control unit (800) to the second electrode tab (40) to induce the all-solid-state secondary battery (SB) into a charging or discharging state, thereby measuring the temperature inside the all-solid-state secondary battery (SB). The temperature of the second electrode tab (40) measured by the second temperature sensor (402) can be transmitted to the control unit (800) and displayed externally, but is not limited thereto. The second temperature sensor (402) can include various known temperature sensing means. For example, the second temperature sensor (402) can include various known thermocouples utilizing the Seebeck effect, but is not limited thereto. Since the second temperature sensor (402) includes a thermocouple, the second temperature sensor (402) can be prevented from being damaged by the heat of the second electrode tab (40) due to the characteristics of the metals included in the thermocouple.

[0220] The hinge (700) connects between the mounting portion (100) and the pressurizing portion (200), and can connect between the mounting portion (100) and the pressurizing portion (200) that rotates relative to the mounting portion (100) to cover the mounting portion. The hinge (700) may include various known hinge means, but is not limited thereto.

[0221] The control unit (800) is connected to the first wire (301), the first temperature sensor (401), the second wire (302), and the second temperature sensor (402). The control unit (800) applies current to the first electrode tab (30) and the second electrode tab (40) through the first wire (301) and the second wire (302), respectively, thereby inducing the all-solid-state secondary battery (SB) into a charging or discharging state. The control unit (800) measures the voltage of the first electrode tab (30) through the first wire (301) and the voltage of the second electrode tab (40) through the second wire (302) to measure the voltage inside the all-solid-state secondary battery (SB), and at the same time, measures the temperature of the first electrode tab (30) through the first temperature sensor (401) and the temperature of the second electrode tab (40) through the second temperature sensor (402) to measure the temperature inside the all-solid-state secondary battery (SB). The control unit (800) may include, but is not limited to, various known current generating means and voltage measuring means connected to each of the first wire (301) and the second wire (302), and various known temperature measuring means and temperature display means connected to each of the first temperature sensor (401) and the second temperature sensor (402).

[0222] For example, a solid-state secondary battery temperature measuring device (1003) according to another embodiment includes a fixing portion (100) and a pressing portion (200) that simultaneously pressurize and fix a first electrode tab (30) and a second electrode tab (40) of an solid-state secondary battery (SB), and includes a first wire (301) and a second wire (302) that apply current to each of the first electrode tab (30) and the second electrode tab (40) to induce the solid-state secondary battery (SB) into a charge or discharge state, and at the same time measure the voltage inside the solid-state secondary battery (SB) through each of the first electrode tab (30) and the second electrode tab (40), and measures the temperature of each of the first electrode tab (30) and the second electrode tab (40) due to heat conducted from the inside of the solid-state secondary battery (SB) induced into a charge or discharge state to each of the first electrode tab (30) and the second electrode tab (40), thereby measuring the temperature of the solid-state secondary battery (SB) By including a first temperature sensor (401) and a second temperature sensor (402) each for measuring the temperature inside the battery (SB), the temperature and voltage inside the all-solid-state secondary battery (SB) can be measured.

[0223] An all-solid-state secondary battery temperature measuring device (1003) capable of measuring the temperature and voltage inside an all-solid-state secondary battery (SB) can be provided.

[0224] Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements made by those skilled in the art using the basic concept of the present invention defined in the following claims also fall within the scope of the present invention.

[0225] [Explanation of symbols]

[0226] All-solid-state secondary battery (SB), first electrode tab (30), mounting portion (100), pressurizing portion (200), wire (300), temperature sensor (400)

Claims

1. A mounting portion where the first electrode tab of an all-solid-state secondary battery is mounted; A pressing part positioned on the above-mentioned mounting part and pressing the mounting part with the first electrode tab therebetween; A wire connected to the first electrode tab located between the mounting portion and the pressurizing portion; and A temperature sensor in contact with the first electrode tab located between the mounting portion and the pressurizing portion. A solid-state secondary battery temperature measuring device comprising:

2. In paragraph 1, An all-solid-state secondary battery temperature measuring device further comprising a control unit connected to the above wire and the above temperature sensor.

3. In paragraph 2, The above control unit applies current to the first electrode tab through the above wire, The above control unit is an all-solid-state secondary battery temperature measuring device that measures the temperature of the all-solid-state secondary battery through the first electrode tab via the temperature sensor.

4. In paragraph 1, The above temperature sensor is an all-solid-state secondary battery temperature measuring device including a thermocouple.

5. In paragraph 1, The above all-solid-state secondary battery, The first electrode, the second electrode on the first electrode, and the all-solid-state electrode assembly positioned between the first electrode and the second electrode; A pouch for sealing the above all-solid-state electrode assembly in an internal space; The first electrode tab protruding from the first electrode through the pouch and out of the pouch; and A second electrode tab spaced apart from the first electrode tab and protruding from the second electrode through the pouch and out of the pouch A solid-state secondary battery temperature measuring device comprising:

6. In paragraph 5, The second electrode tab is mounted on the above-mentioned mounting portion, and the pressing portion presses the mounting portion with the second electrode tab interposed therebetween. Another wire connected to the second electrode tab located between the mounting portion and the pressurizing portion; and Another temperature sensor in contact with the second electrode tab located between the above-mentioned mounting portion and the above-mentioned pressing portion A solid-state secondary battery temperature measuring device further comprising:

7. In paragraph 5, The above all-solid-state secondary battery further includes a pressurizing jig for pressurizing the front and back surfaces of the pouch.

8. In paragraph 7, An all-solid-state secondary battery temperature measuring device further comprising a fixing part coupled to the above-mentioned fixing part and fixed to the pressurizing jig.

9. In paragraph 8, A solid-state secondary battery temperature measuring device in which a portion of the above pressurized jig is inserted into the above fixed portion.

10. In paragraph 1, An all-solid-state secondary battery temperature measuring device further comprising an elastic hinge connecting the mounting portion and the pressing portion and elastically rotating the pressing portion with respect to the mounting portion.

11. In paragraph 10, The above pressurized part, A first sub-pressurizing unit equipped with the above wire; and A second sub-pressurizing unit coupled to the first sub-pressurizing unit and equipped with the temperature sensor A solid-state secondary battery temperature measuring device comprising:

12. In paragraph 11, An all-solid-state secondary battery temperature measuring device in which the first sub-pressurizing section and the second sub-pressurizing section rotate simultaneously by the elastic hinge.

13. In paragraph 11, The above first sub-pressure unit includes a conductor, The above second sub-pressurizing unit is an all-solid-state secondary battery temperature measuring device including an insulator.

14. In paragraph 11, The above first sub-pressure unit is, A wire connection portion to which the above wire is connected; and A tab contact portion connected to the above wire connection portion and in contact with the first electrode tab A solid-state secondary battery temperature measuring device comprising:

15. In paragraph 11, The second sub-pressure portion includes a through hole corresponding to the first electrode tab, The above temperature sensor is an all-solid-state secondary battery temperature measuring device that extends along the side of the second sub-pressurizing portion, penetrates the through hole, and comes into contact with the first electrode tab.

16. In paragraph 1, The above wire and the above temperature sensor are an all-solid-state secondary battery temperature measuring device mounted on the mounting portion between the mounting portion and the pressurizing portion.

17. In paragraph 16, An all-solid-state secondary battery temperature measuring device, wherein the above-mentioned mounting portion includes a heat-resistant structure in which the above-mentioned wire and the above-mentioned temperature sensor are located.

18. In paragraph 17, The above first electrode tab is mounted on the heat-resistant structure, The above wire and the above temperature sensor are an all-solid-state secondary battery temperature measuring device in contact with the first electrode tab.

19. In paragraph 16, An all-solid-state secondary battery temperature measuring device further comprising a hinge connecting the mounting portion and the pressurizing portion.

20. In paragraph 16, The above wire is an all-solid-state secondary battery temperature measuring device including a heat-resistant material.

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