Battery manufacturing method

Abstract

The invention discloses a manufacturing method of a battery. Provided is a method for manufacturing a battery in which the time required to permeate an electrolyte into an electrode body is shortened. A method for manufacturing a battery includes: a first step of preparing an electrode body including a substance capable of holding an electrolyte solution and the electrolyte solution held by the substance; a second step in which the electrode body is accommodated in an exterior body; and a third step of supplying an electrolyte solution into the exterior body.

Description

Technical Field

[0001] The present disclosure relates to a method for manufacturing a battery. Background Art

[0002] In the manufacturing process of a battery using an electrolytic solution obtained by dissolving an electrolyte in an organic solvent, a liquid injection operation is performed to supply the electrolytic solution into an outer casing that houses an electrode body and allow the electrolytic solution to penetrate into the electrode body.

[0003] The electrodes of the battery are sometimes pressed at high pressure to increase the energy density. If the packing density of the electrode active material in the electrode is increased by pressing the electrode, the permeability of the electrolyte is reduced. The reduction in the permeability of the electrolyte becomes a reason for reducing the efficiency of the injection operation.

[0004] Japanese Patent Application Laid-Open No. 2003-077545 describes a method for manufacturing a battery in which an electrode body having a polymer layer disposed between an electrode and a separator is housed in a battery case, and then an electrolyte is injected into the battery case and allowed to permeate into the electrode body.

[0005] The method described in Japanese Patent Application Laid-Open No. 2003-077545 has improved workability compared to the case where an electrode body is produced using a polymer layer that has been previously permeated with an electrolyte solution. On the other hand, it is desirable to shorten the time required for the electrolyte solution to permeate into the electrode body. Summary of the invention

[0006] In view of the above circumstances, an object of one embodiment of the present disclosure is to provide a method for manufacturing a battery that shortens the time required for an electrolyte solution to permeate into an electrode body.

[0007] Means for solving the above-mentioned problems include the following embodiments.

[0008] <1> A method for manufacturing a battery, comprising:

[0009] A first step of preparing an electrode body, the electrode body comprising a substance capable of retaining an electrolyte and the electrolyte retained by the substance;

[0010] A second step of housing the electrode assembly in an outer casing; and

[0011] A third step of supplying an electrolyte solution into the interior of the outer casing.

[0012] <2> according to <1> The battery manufacturing method can keep the substance of the electrolyte as a high molecular substance.

[0013] <3> according to <1> or <2> The battery manufacturing method can keep the substance of the electrolyte and the electrolyte in a gel state.

[0014] <4> according to <1> ~ <3> A method for manufacturing a battery as described in any one of the above, wherein the method for preparing an electrode body in the first step is to bring an electrolyte into contact with at least one of an electrode and a separator containing a substance capable of retaining the electrolyte, and then use at least one of the electrode and the separator that have been brought into contact with the electrolyte to make the electrode body.

[0015] <5> according to <1> ~ <3> The method for manufacturing a battery described in any one of the above, wherein the method for preparing the electrode body in the first step is to use at least one of an electrode and a separator containing a substance capable of retaining an electrolyte to make the electrode body, and then bring the electrolyte into contact with the electrode body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a diagram schematically showing an example of the structure of a stacked body included in an electrode body.

[0017] Figure 2 This is a diagram schematically showing an example in which a battery module is applied to an electric vehicle.

[0018] Figure 3 This is a diagram schematically showing an example of the configuration of a battery module.

[0019] Figure 4 This is a diagram schematically showing an example of the configuration of a battery module.

[0020] Figure 5 This is a diagram schematically showing an example of the configuration of battery cells included in a battery module. DETAILED DESCRIPTION

[0021] In the present disclosure, a numerical range expressed using "to" means a range including the numerical values ​​described before and after "to" as the minimum value and the maximum value, respectively.

[0022] In the numerical ranges recorded in stages in the present disclosure, the upper limit or lower limit recorded in a certain numerical range can be replaced by the upper limit or lower limit of other numerical ranges recorded in stages. In the numerical ranges recorded in the present disclosure, the upper limit or lower limit recorded in a certain numerical range can be replaced by the value shown in the embodiment.

[0023] In the present disclosure, the term "process" includes not only an independent process but also a process that cannot be clearly distinguished from other processes as long as the intended purpose of the process can be achieved.

[0024] In the present disclosure, when an embodiment is described with reference to the drawings, the configuration of the embodiment is not limited to the configuration shown in the drawings. In addition, the sizes of components in each figure are conceptual, and the relative relationship between the sizes of the components is not limited to this.

[0025] The method for manufacturing a battery disclosed herein comprises:

[0026] A first step of preparing an electrode body, the electrode body comprising a substance capable of retaining an electrolyte and the electrolyte retained by the substance;

[0027] A second step of housing the electrode assembly in an outer casing; and

[0028] A third step of supplying an electrolyte solution into the interior of the outer casing.

[0029] In a general method for manufacturing a battery, an electrode body is contained in an outer body, and then an electrolyte is supplied to the inner part of the outer body. Then, the operation is stopped and a wait is performed until the electrolyte supplied to the outer body penetrates into the electrode body. This waiting time may become a major factor that reduces the efficiency of the injection operation.

[0030] In the method disclosed in the present invention, before the electrode body is housed in the outer body, a substance capable of retaining an electrolyte is made to retain the electrolyte. That is, a portion of the total amount of the electrolyte that eventually permeates the electrode body is made to penetrate into the electrode body before being housed in the outer body. Therefore, the amount of electrolyte supplied to the interior of the outer body is less than the total amount of electrolyte that eventually permeates the electrode body. As a result, the time required for the electrolyte inside the outer body to penetrate into the electrode body can be shortened. Moreover, since the substance capable of retaining an electrolyte retains the electrolyte, the electrolyte can be made to penetrate into the electrode body while suppressing the volatilization of the solvent.

[0031] Hereinafter, each step in the method of the present disclosure will be described.

[0032] (1st step)

[0033] In the first step, an electrode body is prepared, the electrode body including a substance capable of retaining an electrolyte solution and the electrolyte solution retained by the substance.

[0034] In the present disclosure, the electrode body means a structure including a stacked body composed of a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode.

[0035] Examples of the form of the electrode body including a stack composed of a positive electrode, a negative electrode, and a separator disposed therebetween include a stack of multiple stacks cut into predetermined sizes and a wound stack.

[0036] Hereinafter, the positive electrode and the negative electrode included in the electrode body may be collectively referred to as “electrode”.

[0037] The type of substance capable of retaining the electrolyte solution is not particularly limited as long as it does not affect the battery performance.

[0038] The substance capable of retaining the electrolyte solution may be a polymer substance. The type of the polymer substance is not particularly limited, and examples thereof include polyvinylidene fluoride, polyhexafluoropropylene, polytetrafluoroethylene, polyacrylonitrile, styrene-butadiene rubber, acrylic resin, polyester resin, and the like.

[0039] The substance capable of retaining the electrolyte solution may be in a gel state, a sponge state, a fiber state, or the like, for example.

[0040] From the viewpoint of fully ensuring the energy density of the battery, the substance capable of retaining the electrolyte preferably has a large amount of electrolyte retained per unit volume. In addition, from the viewpoint of workability when making the electrode body, it is preferred that the electrolyte is difficult to seep out from the substance capable of retaining the electrolyte.

[0041] Therefore, the substance capable of retaining an electrolyte solution is preferably in a state of being able to retain the electrolyte solution inside the three-dimensional network structure and being in a gel state. That is, the substance capable of retaining an electrolyte solution and the electrolyte solution are preferably in a gel state.

[0042] The type of the electrolyte solution held by the substance capable of holding the electrolyte solution is not particularly limited, and an electrolyte solution obtained by dissolving a solute used in a known electrolyte solution in a solvent can be used.

[0043] Specific examples of the solute of the electrolyte include LiPF6, LiFSi, and the like.

[0044] The solute of the electrolyte solution may be a single type or two or more types.

[0045] As the solvent of the electrolyte, specifically, cyclic or chain carbonates such as ethylene carbonate (EC), dimethyl carbonate (DMC), diethyl carbonate (DEC), and ethyl methyl carbonate (EMC) can be cited. The solvent can also be a mixture of two or more solvents, or a mixture comprising cyclic carbonates and chain carbonates.

[0046] The solvent may contain additives such as vinylene carbonate (VC).

[0047] The amount of the substance capable of retaining the electrolyte contained in the electrode body is not particularly limited.

[0048] From the perspective of reducing the amount of electrolyte supplied to the interior of the outer casing in the third step, the amount of the above-mentioned substance can be an amount that can maintain 5 volume % or more, 10 volume % or more, or 15 volume % or more of the total amount of electrolyte that finally permeates the electrode body.

[0049] From the viewpoint of workability when housing the electrode body in the outer casing in the second step, the amount of the substance may be an amount capable of maintaining 80 volume % or less, 50 volume % or less, or 30 volume % or less of the total amount of the electrolyte solution finally impregnated into the electrode body.

[0050] The amount of the electrolyte solution contained in the electrode body is not particularly limited.

[0051] From the viewpoint of reducing the amount of electrolyte supplied to the interior of the outer casing in the third step, the amount of the electrolyte may be 5 volume % or more, 10 volume % or more, or 15 volume % or more of the total amount of electrolyte finally impregnated into the electrode body.

[0052] From the viewpoint of workability when housing the electrode assembly in the outer casing in the second step, the amount of the electrolyte may be 80 volume % or less, 50 volume % or less, or 30 volume % or less of the total amount of the electrolyte finally impregnated into the electrode assembly.

[0053] As a method for preparing an electrode body including a substance capable of retaining an electrolyte solution and an electrolyte solution retained by the substance, the following method 1 and method 2 can be cited.

[0054] Method 1: A method in which an electrolyte solution is brought into contact with at least one of an electrode and a separator containing a substance capable of retaining the electrolyte solution, and then an electrode body is produced using at least one of the electrode and the separator brought into contact with the electrolyte solution.

[0055] Method 2: A method of producing an electrode body using at least one of an electrode and a separator containing a substance capable of retaining an electrolytic solution, and then bringing the electrolytic solution into contact with the electrode body.

[0056] Of the methods 1 and 2, the method 1 is preferred from the viewpoint of increasing the contact opportunity between the substance capable of retaining the electrolyte and the electrolyte, thereby allowing the electrode body to efficiently contain the electrolyte.

[0057] The method of bringing the substance capable of retaining an electrolyte solution into contact with the electrolyte solution is not particularly limited, and examples thereof include an immersion method, a coating method, and a spraying method.

[0058] In Method 1 and Method 2, the method for producing the electrode body is not particularly limited, and a known method can be used.

[0059] When at least one of the electrode and the separator constituting the electrode body contains a substance capable of retaining an electrolyte, the entirety of at least one of the electrode and the separator may contain the substance capable of retaining an electrolyte, or a portion of at least one of the electrode and the separator may contain the substance capable of retaining an electrolyte.

[0060] When at least one of the electrode and the separator constituting the electrode body contains a substance capable of retaining an electrolyte, the substance capable of retaining an electrolyte may be in a state of being arranged on the surface of at least one of the electrode and the separator, or in a state of being arranged inside at least one of the electrode and the separator.

[0061] The substance capable of retaining the electrolyte contained in at least one of the electrode and the separator may be, for example, arranged in the form of particles on the surface or inside of at least one of the electrode and the separator, or in the form of a layer on the surface or inside of at least one of the electrode and the separator.

[0062] The positive electrode and the negative electrode included in the electrode body contain a positive electrode active material or a negative electrode active material, respectively, as an electrode active material.

[0063] When the battery is a lithium ion secondary battery, the positive electrode active material may be a composite oxide composed of lithium and a transition metal and other metals that may be optionally contained (hereinafter also referred to as a lithium transition metal composite oxide). As transition metals and other metals, Ni, Co, Mn, Al, B, Mg, Ti, V, Cr, Fe, Cu, Zn, Ga, Sr, Zr, Nb, In, Sn, Ta, W, etc. may be mentioned.

[0064] Examples of the lithium transition metal composite oxide include layered lithium transition metal composite oxides, spinel lithium transition metal composite oxides, and olivine lithium transition metal composite oxides.

[0065] Examples of the layered lithium transition metal composite oxide include layered lithium transition metal composite oxides containing at least one selected from Ni, Co and Mn as a transition metal. Specifically, examples include LiNi a Co b Mn c A compound represented by the structural formula O2 (a, b, c are respectively numbers greater than 0 and less than 1, a+b+c=1), and a compound obtained by adding one or more elements selected from Al, Mg, La, Ti, Zn, B, W, Fe, Cr, V, Ru, Cu, Cd, Ag, Y, Sc, Ga, In, As, Sb, Pt, Au, Si, etc. to the above compound.

[0066] Specific examples of spinel-type lithium transition metal composite oxides include LiMn 2 O 4 .

[0067] Specific examples of the olivine-type lithium transition metal composite oxide include LiMPO 4 (M: Fe, Co, Ni, or Mn).

[0068] The positive electrode active material contained in the electrode may be a single type or two or more types.

[0069] When the battery is a lithium ion secondary battery, specific examples of the negative electrode active material include carbon materials such as graphite, hard carbon, soft carbon, and activated carbon, silicon, metallic lithium, lithium alloys, and lithium titanate (LTO).

[0070] The negative electrode active material contained in the electrode may be a single type or two or more types.

[0071] The electrodes may also comprise conductive materials.

[0072] Specific examples of the conductive material include carbon materials such as carbon black (acetylene black, thermal black, furnace black, etc.), carbon nanotubes, and graphite.

[0073] The conductive material contained in the electrode may be a single type or two or more types.

[0074] The electrodes may also contain a binder.

[0075] Specific examples of binders include polyvinylidene fluoride (PVdF), polyethylene, polypropylene, polyethylene terephthalate, cellulose, nitrocellulose, carboxymethyl cellulose, polyethylene oxide, polyepichlorohydrin, polyacrylonitrile, styrene-butadiene rubber (SBR), acrylonitrile-butadiene rubber (NBR), polyacrylate, polymethacrylate, polytetrafluoroethylene (PTFE), and the like.

[0076] The binder contained in the electrode may be a single type or two or more types.

[0077] The electrode included in the electrode body may include a current collector and an electrode layer disposed in contact with one or both surfaces of the current collector.

[0078] The thickness of the electrode layer is not particularly limited and can be selected from the thickness of common electrode layers. For example, the thickness of the electrode layer can be selected from the range of 10 μm to 200 μm.

[0079] Examples of the material of the current collector constituting the positive electrode include aluminum, aluminum alloys, nickel, titanium, stainless steel, etc. Examples of the shape of the current collector include foil, mesh, and the like.

[0080] Examples of the material of the current collector constituting the negative electrode include copper, copper alloys, nickel, titanium, stainless steel, etc. Examples of the shape of the current collector include foil, mesh, and the like.

[0081] Examples of the separator included in the electrode body include nonwoven fabrics, cloths, and microporous films mainly composed of polyolefins such as polyethylene and polypropylene.

[0082] The thickness of the separator is not particularly limited and can be selected from the thickness of common separators. For example, the thickness of the separator can be selected from the range of 10 μm to 200 μm.

[0083] exist Figure 1 An example of the structure of the stacked body included in the electrode body is schematically shown in FIG.

[0084] Figure 1 The laminate 100 shown is composed of a positive electrode 10, a negative electrode 20, and a separator 30 disposed between the positive electrode 10 and the negative electrode 20. The positive electrode 10 is composed of a positive electrode layer 10A and a positive electrode collector 10B. The negative electrode 20 is composed of a negative electrode layer 20A and a negative electrode collector 20B.

[0085] (Second step)

[0086] In the second step, the electrode assembly including the substance capable of retaining the electrolyte and the electrolyte retained by the substance is housed in an outer casing.

[0087] The type of the outer casing that houses the electrode assembly is not particularly limited and can be selected according to the type of the battery.

[0088] In one embodiment, a sheet-shaped outer casing may be used.

[0089] As a sheet-like outer casing, an outer casing containing metal can be cited. Specifically, a laminate (so-called laminate film) having a metal layer containing a metal such as aluminum and a heat seal layer (heat seal layer) containing a resin melted by heating can be cited. That is, the battery manufactured by the method disclosed herein can be a battery using a laminate film as an outer casing (so-called laminate battery).

[0090] The outer casing may be a single member or may be composed of two or more members. For example, when the outer casing is a sheet-like object, the outer casing may be composed of a single sheet-like object or may be composed of two sheet-like objects.

[0091] If necessary, the recessed portion for accommodating the electrode body may be formed in the sheet-like outer casing by embossing.

[0092] As a method of housing the electrode assembly in an outer casing using a sheet-like outer casing, for example, the following method 1 and method 2 can be cited.

[0093] Method 1: A method in which the outer casing around the electrode assembly is joined in a state in which the electrode assembly is disposed between one outer casing folded in half or between two overlapping outer casings.

[0094] Method 2: A method in which a bag is prepared by joining the peripheries of a single outer casing folded in half or two overlapping outer casings, and the electrode assembly is placed in the bag.

[0095] (Step 3)

[0096] In the third step, the electrolyte solution is supplied to the interior of the outer casing housing the electrode assembly.

[0097] The method of supplying the electrolyte solution into the interior of the outer casing is not particularly limited, and can be selected from known methods.

[0098] The supply of the electrolyte solution may include a step of reducing the pressure inside the outer casing that houses the electrode body. By reducing the pressure inside the outer casing that houses the electrode body, the penetration of the electrolyte solution into the electrode body can be promoted.

[0099] In the method disclosed herein, the electrode body before being housed in the outer body is already in a state of containing electrolyte. Therefore, the amount of electrolyte supplied to the interior of the outer body in the third step is less than the total amount of electrolyte that finally permeates the electrode body. Therefore, the time required for the electrolyte to permeate the electrode body in the third step is shortened.

[0100] (Battery types and application examples)

[0101] The type of battery manufactured using the method of the present disclosure is not particularly limited.

[0102] Specific examples of the battery include secondary batteries such as lithium ion secondary batteries, lead storage batteries, nickel-metal hydride storage batteries, nickel-cadmium storage batteries, nickel-iron storage batteries, nickel-zinc storage batteries, silver oxide-zinc storage batteries, and cobalt-titanium-lithium secondary batteries.

[0103] From the viewpoint of energy density, versatility, etc., the battery may be a lithium ion secondary battery.

[0104] The battery manufactured by the method disclosed in the present invention can be installed in an electric vehicle. Hereinafter, an example of applying the battery to an electric vehicle will be described with reference to the accompanying drawings. In the following description, "battery unit 20" corresponds to the battery disclosed in the present invention.

[0105] Figure 2 1 is a schematic plan view showing the main parts of a vehicle 100 to which the battery pack 10 according to the embodiment is applied. Figure 2 As shown, the vehicle 100 is an electric vehicle (BEV) equipped with a battery pack 10 under the floor. In addition, the arrows UP, FR, and LH in each figure respectively indicate the upper side in the vehicle vertical direction, the front side in the vehicle front-back direction, and the left side in the vehicle width direction. When the front-back, left-right, up-down and down directions are used for explanation, unless otherwise specified, they indicate the front-back in the vehicle front-back direction, the left-right in the vehicle width direction, and the up-down in the vehicle vertical direction.

[0106] The vehicle 100 of the present embodiment, as an example, is provided with a DC / DC converter 102, an electric compressor 104, and a PTC (Positive Temperature Coefficient) heater 106 on the vehicle front side relative to the battery pack 10. In addition, an electric motor 108, a gear box 110, an inverter 112, and a charger 114 are provided on the vehicle rear side relative to the battery pack 10.

[0107] The DC current output from battery pack 10 is regulated in voltage by DC / DC converter 102 and then supplied to electric compressor 104, PTC heater 106, inverter 112, etc. Furthermore, by supplying power to electric motor 108 via inverter 112, the rear wheels rotate and vehicle 100 travels.

[0108] A charging port 116 is provided at the right side of the rear portion of the vehicle 100 . By connecting a charging plug of an external charging device (not shown) to the charging port 116 , electricity can be stored in the battery pack 10 via the charger 114 .

[0109] The configuration and structure of each component constituting the vehicle 100 are not limited to the above-mentioned configuration. For example, it can also be applied to a hybrid vehicle (HV: Hybrid Vehicle) or a plug-in hybrid vehicle (PHEV: Plug-in Hybrid Electric Vehicle) equipped with an engine. In addition, in the present embodiment, the motor 108 is mounted on the rear of the vehicle and is a rear-wheel drive vehicle, but it is not limited to this. The motor 108 can also be mounted on the front of the vehicle. A front-wheel drive vehicle can also be mounted on the front and rear of the vehicle. In addition, it can also be a vehicle with an in-wheel motor on each wheel.

[0110] The battery pack 10 is composed of a plurality of battery modules 11. In the present embodiment, as an example, 10 battery modules 11 are provided. Specifically, five battery modules 11 are arranged in the vehicle front-rear direction on the right side of the vehicle 100, and five battery modules 11 are arranged in the vehicle front-rear direction on the left side of the vehicle 100. In addition, each battery module 11 is electrically connected.

[0111] Figure 3 1 is a schematic three-dimensional diagram of the battery module 11. Figure 3 As shown, the battery module 11 is formed into a substantially rectangular parallelepiped shape with the vehicle width direction as the length direction. In addition, the outer shell of the battery module 11 is formed of an aluminum alloy. For example, the outer shell of the battery module 11 is formed by joining aluminum die castings at both ends of an aluminum alloy extrusion material by laser welding or the like.

[0112] A pair of voltage terminals 12 and a connector 14 are provided at both ends of the battery module 11 in the vehicle width direction. A flexible printed circuit board 21 described later is connected to the connector 14. In addition, bus bars (not shown) are welded to both ends of the battery module 11 in the vehicle width direction.

[0113] The battery module 11 has a length MW in the vehicle width direction of, for example, 350 mm to 600 mm, a length ML in the vehicle front-rear direction of, for example, 150 mm to 250 mm, and a height MH in the vehicle up-down direction of, for example, 80 mm to 110 mm.

[0114] Figure 4 1 is a plan view of a state where the upper cover of the battery module 11 is removed. Figure 4 As shown, a plurality of battery cells 20 are housed in an aligned state inside the battery module 11. In the present embodiment, as an example, 24 battery cells 20 are aligned in the vehicle front-rear direction and bonded to each other.

[0115] A flexible printed circuit (FPC) board 21 is disposed on the battery cell 20. The flexible printed circuit board 21 is formed in a strip shape with the vehicle width direction as the longitudinal direction, and thermistors 23 are provided at both ends of the flexible printed circuit board 21. The thermistor 23 is not bonded to the battery cell 20 but is pressed toward the battery cell 20 by the upper cover of the battery module 11.

[0116] In addition, one or more buffer materials (not shown) are accommodated inside the battery module 11. For example, the buffer material is a thin plate-shaped member that can be elastically deformed, and is arranged between adjacent battery cells 20 with the arrangement direction of the battery cells 20 as the thickness direction. In this embodiment, as an example, buffer materials are respectively arranged at both ends in the longitudinal direction and the central part in the longitudinal direction of the battery module 11.

[0117] Figure 5 2 is a schematic diagram of a battery cell 20 housed in a battery module 11 as viewed from the thickness direction. Figure 5 As shown, the battery cell 20 is formed in a substantially rectangular plate shape, and an electrode body (not shown) is accommodated therein. The electrode body is formed by stacking a positive electrode, a negative electrode, and a separator, and is sealed by a laminate film 22 .

[0118] In this embodiment, as an example, the electrode body receiving portion is formed by folding and laminating the embossed sheet-shaped laminate film 22. The laminate film 22 can have any one of a single cup embossed structure with one embossing and a double cup embossed structure with two embossings. The laminate film 22 in one embodiment has a single cup embossed structure with a drawing depth of about 8 mm to 10 mm.

[0119] The upper ends of both ends of the battery cell 20 in the longitudinal direction are bent, and the corners become the outer shape. In addition, the upper end of the battery cell 20 is bent, and a fixing tape 24 is wound around the upper end of the battery cell 20 along the longitudinal direction.

[0120] Terminals (tabs) 26 are provided at both ends of the battery cell 20 in the longitudinal direction. In the present embodiment, as an example, the terminals 26 are provided at positions offset downward from the vertical center of the battery cell 20. The terminals 26 are joined to bus bars (not shown) by laser welding or the like.

[0121] For example, the length CW1 of the battery cell 20 in the vehicle width direction is 530mm~600mm, 600mm~700mm, 700mm~800mm, 800mm~900mm, or 1000mm or more, the length CW2 of the area accommodating the electrode body is 500mm~520mm, 600mm~700mm, 700mm~800mm, 800mm~900mm, or 1000mm or more, the height CH is 80mm~110mm, or 110mm~140mm, the thickness is 5.0mm~7.0mm, 7.0mm~9.0mm, or 9.0mm~11.0mm, and the height TH of the terminal 26 is 40mm~50mm, 50mm~60mm, or 60mm~70mm.

Claims

1. A method for manufacturing a battery, comprising: A first step of preparing an electrode body, the electrode body comprising a substance capable of retaining an electrolyte and the electrolyte retained by the substance; A second step of housing the electrode assembly in an outer casing; and A third step of supplying an electrolyte solution into the interior of the outer casing.

2. The method for manufacturing a battery according to claim 1, wherein the substance capable of retaining the electrolyte is a polymer substance.

3. The method for manufacturing a battery according to claim 1, wherein the substance of the electrolyte solution and the electrolyte solution are in a gel state.

4. The method for manufacturing a battery according to any one of claims 1 to 3, The method of preparing the electrode body in the first step is a method of bringing an electrolyte into contact with at least one of an electrode and a separator containing a substance capable of retaining the electrolyte, and then manufacturing the electrode body using at least one of the electrode and the separator brought into contact with the electrolyte.

5. The method for manufacturing a battery according to any one of claims 1 to 3, The method of preparing the electrode body in the first step is a method of manufacturing the electrode body using at least one of an electrode and a separator containing a substance capable of retaining an electrolyte solution, and then bringing the electrolyte solution into contact with the electrode body.

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