JP5151123B2 - Bipolar battery manufacturing method and manufacturing apparatus - Google Patents

Description

  The present invention relates to a bipolar battery manufacturing method and manufacturing apparatus.

  In recent years, reduction of carbon dioxide emissions has been strongly desired for environmental protection. In the automobile industry, there is a great expectation for the reduction of carbon dioxide emissions by introducing electric vehicles and hybrid electric vehicles, and attention has been focused on bipolar type (bipolar) batteries as a power source for driving motors, which is the key to their practical use. ing.

In a bipolar battery, a current collector in which a positive electrode and a negative electrode are arranged and an electrolyte layer are alternately stacked, and a sealing base material is provided so that the electrolyte does not contact to prevent a liquid junction (for example, , See Patent Document 1).
JP 9-23003 A

  However, it is difficult to stack accurately. Therefore, when a shift | offset | difference arises in an electrode and an electrolyte layer (separator), it has the problem that an internal short circuit by the contact of electrodes and a sealing performance fall will arise, and a yield will fall. Low yields can increase raw material costs and manufacturing costs, which can put pressure on corporate profits.

  The present invention has been made to solve the problems associated with the above-described prior art, and an object of the present invention is to provide a bipolar battery manufacturing method and manufacturing apparatus that can achieve a good yield.

In order to achieve the above object, the invention described in claim 1
A bipolar electrode having a current collector, a positive electrode comprising a positive electrode active material layer disposed on one surface of the current collector, and a negative electrode comprising a negative electrode active material layer disposed on the other surface of the current collector; A stacking means for alternately stacking a plurality of separate electrolyte layers;
The laminating means includes
A holding mechanism capable of alternately holding the bipolar electrode and the electrolyte layer;
A support structure to which the holding mechanism is attached;
A cradle in which a laminate of the bipolar electrode and the electrolyte layer is disposed; and
Z-axis moving means for relatively moving the holding mechanism and the cradle in a direction perpendicular to the surface direction of the bipolar electrode and the electrolyte layer so as to be close to and away from each other;
The holding mechanism is
The bipolar electrode and the electrolyte layer is gripped by the holding mechanism, so as not to contact with each other, are arranged in the vertical direction, and said electrolyte layer, and the positive active material layer of the bipolar electrode, The negative electrode active material layer is aligned with respect to the vertical direction.
The bipolar battery manufacturing apparatus is attached to the support structure.

In order to achieve the above object, the invention described in claim 2
A bipolar electrode having a current collector, a positive electrode comprising a positive electrode active material layer disposed on one surface of the current collector, and a negative electrode comprising a negative electrode active material layer disposed on the other surface of the current collector; Having a stacking means for stacking a plurality of bipolar batteries having the positive electrode or the electrolyte layer disposed on the negative electrode;
The laminating means includes
A holding mechanism capable of gripping the bipolar battery;
A support structure to which the holding mechanism is attached;
A cradle on which the laminate of bipolar batteries is disposed; and
Z-axis moving means for relatively moving the holding mechanism and the cradle in a direction perpendicular to the plane direction of the bipolar battery so as to be close to and away from each other;
The holding mechanism is
The bipolar battery which is gripped by the holding mechanism, so as not to contact with each other, are arranged in the vertical direction, and the positive active material layer of the bipolar battery, the negative active material layer and the electrolyte layer To be aligned with respect to the vertical direction,
The bipolar battery manufacturing apparatus is attached to the support structure.

In order to achieve the above object, the invention according to claim 11 provides:
A bipolar electrode having a current collector, a positive electrode comprising a positive electrode active material layer disposed on one surface of the current collector, and a negative electrode comprising a negative electrode active material layer disposed on the other surface of the current collector; A stacking step for alternately stacking a plurality of separate electrolyte layers;
In the lamination step,
The bipolar electrode and the electrolyte layer are arranged in a direction perpendicular to the surface direction of the bipolar electrode and the electrolyte layer so as not to contact each other, and the electrolyte layer and the bipolar electrode The positive electrode active material layer and the negative electrode active material layer are arranged so as to be aligned with respect to the vertical direction,
The bipolar electrode and the electrolyte layer are moved relative to each other so as to sequentially approach the cradle with respect to the vertical direction,
The bipolar electrode and the electrolyte layer are sequentially arranged on the cradle, and the bipolar electrode and the electrolyte layer are alternately stacked.

In order to achieve the above object, the invention according to claim 12 provides:
A bipolar electrode having a current collector, a positive electrode comprising a positive electrode active material layer disposed on one surface of the current collector, and a negative electrode comprising a negative electrode active material layer disposed on the other surface of the current collector; A stacking step for stacking a plurality of bipolar batteries having the positive electrode or the electrolyte layer disposed on the negative electrode;
In the lamination step,
The bipolar batteries are arranged in a direction perpendicular to the surface direction of the bipolar battery so as not to contact each other, and the positive electrode active material layer, the negative electrode active material layer, and the electrolyte of the bipolar battery Arrange the layers so that they are aligned with respect to said vertical direction;
The bipolar battery is moved relative to the cradle sequentially with respect to the vertical direction,
A bipolar battery manufacturing method comprising: sequentially arranging the bipolar batteries on the cradle and stacking the bipolar batteries.

According to the first aspect of the present invention, the holding mechanism and the cradle are moved relative to each other by the Z-axis moving unit with respect to the direction perpendicular to the surface direction of the bipolar electrode and the electrolyte layer. The electrolyte layers can be alternately stacked. The relative movement suppresses the blurring of the bipolar electrode and the electrolyte layer, and the holding mechanism is disposed in the vertical direction so that the bipolar electrode and the electrolyte layer held by the holding mechanism do not contact each other, And since the electrolyte layer, the positive electrode active material layer of the bipolar electrode , and the negative electrode active material layer are attached to the support structure so as to be aligned with respect to the perpendicular direction, the bipolar electrode and The electrolyte layer can be laminated with high accuracy. Therefore, the occurrence of displacement between the bipolar electrode and the electrolyte layer is suppressed, and the occurrence of an internal short circuit can be avoided, so that the generation of defective products can be reduced. That is, a bipolar battery manufacturing apparatus capable of achieving a good yield can be provided.

According to the invention described in claim 2, the bipolar battery is stacked by moving the holding mechanism and the cradle relative to the direction perpendicular to the plane direction of the bipolar battery by the Z-axis moving means. Is possible. The relative movement suppresses the shake of the bipolar battery, and the holding mechanism is arranged in the vertical direction so that the bipolar batteries gripped by the holding mechanism do not contact each other, and the bipolar battery Since the positive electrode active material layer, the negative electrode active material layer, and the electrolyte layer are attached to the support structure so as to be aligned with respect to the vertical direction, the bipolar battery can be accurately stacked. Therefore, the occurrence of deviation of the bipolar battery is suppressed and the occurrence of an internal short circuit can be avoided, so that the occurrence of defective products can be reduced. That is, a bipolar battery manufacturing apparatus capable of achieving a good yield can be provided.

According to the eleventh aspect of the present invention, in the laminating step, the bipolar electrode and the electrolyte layer are relative to each other so as to be sequentially close to the cradle in a direction perpendicular to the surface direction of the bipolar electrode and the electrolyte layer. The bipolar electrode and the electrolyte layer are sequentially arranged on the cradle, and the bipolar electrode and the electrolyte layer are alternately stacked. The relative movement suppresses the blurring of the bipolar electrode and the electrolyte layer. At this time, the bipolar electrode and the electrolyte layer are arranged in the perpendicular direction so as not to contact each other, and a positive electrode active material layer-type electrode, and the anode active material layer is, with respect to the vertical direction, so as to be aligned, since the arrangement, the bipolar electrodes and electrolyte layers are accurately stacked. Therefore, the occurrence of displacement between the bipolar electrode and the electrolyte layer is suppressed, and the occurrence of an internal short circuit can be avoided, so that the generation of defective products can be reduced. That is, a bipolar battery manufacturing method capable of achieving a good yield can be provided.

According to the invention of claim 12, in the laminating step, a bipolar battery, relates direction perpendicular to the plane direction of the bipolar battery, it is relatively moved to sequentially close to cradle, bipolar battery Are sequentially arranged on the cradle, and the bipolar batteries are stacked. The relative movement suppresses blurring of the bipolar battery. At this time, the bipolar batteries are arranged in the vertical direction so as not to contact each other, and the positive electrode active material layer, the negative electrode active material of the bipolar battery are arranged. Since the material layer and the electrolyte layer are arranged so as to be aligned with respect to the perpendicular direction, the bipolar battery is accurately stacked. Therefore, the occurrence of deviation of the bipolar battery is suppressed and the occurrence of an internal short circuit can be avoided, so that the occurrence of defective products can be reduced. That is, a bipolar battery manufacturing method capable of achieving a good yield can be provided.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 is a cross-sectional view for explaining a bipolar battery according to Embodiment 1, FIG. 2 is a cross-sectional view for explaining the bipolar battery according to Embodiment 1, and FIG. 3 is shown in FIG. FIG. 4 is a schematic view of a vehicle on which the assembled battery shown in FIG. 3 is mounted.

  Bipolar battery 110 according to Embodiment 1 is an electrolyte system, and includes negative electrode 112, positive electrode 113, current collector 111, separator (electrolyte layer) 120, first seal 115, and second seal 117. The current collector 111 is disposed between the positive electrode 113 and the negative electrode 112. The electrolyte layer is formed by soaking the electrolytic solution into the negative electrode surface. The first seal 115 is disposed so as to surround the periphery of the positive electrode 113. The separator 120 is disposed so as to cover the positive electrode 113 and the first seal 115. The second seal 117 is disposed on the separator 120 in alignment with the first seal 115.

  The bipolar battery 110 is in the form of a stacked body 100 of a plurality of single cells (battery elements), and is housed in an outer case 104 for preventing external impact and environmental degradation. Terminal plates 101 and 102 are arranged on the outermost layer (the uppermost layer and the lowermost layer) of the laminate 100.

  The terminal plates 101 and 102 are made of a highly conductive member, and are configured to cover at least all of the outermost electrode projection surfaces of the multilayer body 100. Therefore, the resistance of the current extraction portion in the outermost layer is lowered, and the output of the battery can be increased by reducing the resistance in the current extraction in the surface direction. The highly conductive member is, for example, aluminum, copper, titanium, nickel, stainless steel, or an alloy thereof.

  The terminal plates 101 and 102 extend to the outside of the outer case 104 and also serve as electrode tabs for drawing current from the laminate 100. In addition, it is also possible to draw an electric current from the laminated body 100 by disposing an independent separate electrode tab and connecting it to the terminal plates 101 and 102 directly or using a lead. In addition, the terminal plates 101 and 102 can be configured by the current collector 111 located in the outermost layer of the stacked body 100.

  The exterior case 104 is an exterior such as a polymer-metal composite laminate film in which a metal (including an alloy) such as aluminum, stainless steel, nickel, or copper is covered with an insulator such as a polypropylene film from the viewpoint of weight reduction and thermal conductivity. It consists of a material, and part or all of the outer peripheral part is formed by joining by heat sealing | fusion.

  The outer case 104 can be used alone, but can be used, for example, in the form of an assembled battery 130. The assembled battery 130 is configured by connecting a plurality of exterior cases 104 in series and / or in parallel, and includes conductive bars 132 and 134. The conductive bars 132 and 134 are connected to terminal plates 101 and 102 extending from the inside of each outer case 104.

  When connecting and configuring the outer case 104, the capacitance and voltage can be freely adjusted by appropriately connecting in series or parallel. The connection method is, for example, ultrasonic welding, heat welding, laser welding, rivet, caulking, or electron beam.

  The assembled battery 130 itself may be provided in the form of an assembled battery module (large-sized assembled battery) 140 by serializing and / or parallelizing and connecting a plurality of them.

  Since the assembled battery module 140 has good reliability and can secure a large output, for example, it can be provided as a motor driving power source of the vehicle 145 to provide a vehicle having good reliability. is there. The vehicle is, for example, an electric vehicle, a hybrid electric vehicle, or a train.

  The assembled battery module 140 can perform very fine control such as charging control for each built-in exterior case 104 or each assembled battery 130, so that the travel distance per charge can be extended, and the life as an in-vehicle battery can be achieved. It is possible to improve the performance such as prolonging the time.

  FIG. 5 is a process diagram for explaining the bipolar battery manufacturing method according to the first embodiment.

  The bipolar battery manufacturing method according to the first embodiment includes an electrode forming process, a seal precursor arranging process, an electrode setting process, an electrolyte layer forming process, a vacuum introducing process, an electrode stacking process, a pressing process, and a vacuum releasing process. Have.

  Next, each step will be described in order with reference to FIGS.

  6 is a front view for explaining the positive electrode according to the electrode forming step shown in FIG. 5, FIG. 7 is a rear view for explaining the negative electrode according to the electrode forming step shown in FIG. 5, and FIG. It is sectional drawing regarding line VIII-VIII of FIG.

  In the electrode forming step, first, the positive electrode slurry is adjusted. The positive electrode slurry has a positive electrode active material [85% by weight], a conductive additive [5% by weight], and a binder [10% by weight], and is adjusted to a predetermined viscosity by adding a viscosity adjusting solvent.

The positive electrode active material is LiMn ₂ O ₄ . The conductive auxiliary agent is acetylene black. The binder is PVDF (polyvinylidene fluoride). The viscosity adjusting solvent is NMP (N-methyl-2-pyrrolidone).

  The positive electrode slurry is applied to one surface of a current collector 111 made of stainless steel foil (thickness 20 μm). The coating film of the positive electrode slurry is dried using, for example, a vacuum oven to form the positive electrode 113 made of a positive electrode active material layer having a thickness of 30 μm. At this time, NMP is removed by volatilization.

  Next, the negative electrode slurry is adjusted. The negative electrode slurry has a negative electrode active material [90% by weight] and a binder [10% by weight], and has a predetermined viscosity by adding a viscosity adjusting solvent. The negative electrode active material is hard carbon. The binder and viscosity adjusting solvent are PVDF and NMP.

  The negative electrode slurry is applied to the other surface of the current collector 111. The coating film of the negative electrode slurry is dried using, for example, a vacuum oven to form the negative electrode 112 made of a negative electrode active material layer having a thickness of 30 μm. At this time, NMP is removed by volatilization.

  As a result, a bipolar electrode in which the positive electrode 113 and the negative electrode 112 are formed on one surface and the other surface of the current collector 111 (bipolar battery 110 in which no electrolyte layer is formed) is obtained.

  The bipolar battery 110 is cut to a size of 330 × 250 (mm). The outer peripheral portions of the positive electrode 113 and the negative electrode 112 are peeled off with a width of 20 mm in order to expose the current collector.

The positive electrode active material is not limited to LiMn ₂ O ₄ , but it is preferable to apply a lithium-transition metal composite oxide from the viewpoint of capacity and output characteristics. For example, carbon black or graphite can be used as the conductive assistant. Further, the binder and the viscosity adjusting solvent are not limited to PVDF and NMP.

  The material constituting the current collector 111 is not limited to stainless steel foil, and for example, an aluminum foil, a nickel-aluminum clad material, a copper-aluminum clad material, or a plating material of a combination of these metals may be used. Is possible.

  The negative electrode active material is not limited to hard carbon (non-graphitizable carbon material), and for example, a graphite-based carbon material or a lithium-transition metal composite oxide can be used. A negative electrode active material made of carbon and a lithium-transition metal composite oxide is preferable from the viewpoint of capacity and output characteristics.

  The thicknesses of the positive electrode 113 and the negative electrode 112 are not particularly limited, and are set in consideration of the intended use of the battery (for example, emphasis on output and energy) and ion conductivity.

  9 is a front view for explaining the first seal precursor in the seal precursor arrangement step shown in FIG. 5, FIG. 10 is a sectional view taken along line XX in FIG. 9, and FIG. The front view for demonstrating the 2nd seal precursor of the seal precursor arrangement | positioning process shown, FIG. 12 is sectional drawing regarding the line XII-XII of FIG.

  In the seal precursor arrangement step, first, a first seal precursor (one-component uncured epoxy resin) 114 is arranged on the outer periphery of the positive electrode side where the current collector 111 is exposed. At this time, a non-arranged portion is provided with a width of about 10 mm from the outer peripheral end face. For example, application using a dispenser is applied to the arrangement of the first seal precursor 114.

  Next, the separator 120 is arrange | positioned so that all the positive electrode side surfaces of the electrical power collector 111 may be covered. The separator 120 is made of polyethylene, and the thickness and size thereof are 12 μm and 335 × 255 (mm).

  Thereafter, a second seal precursor (one-component uncured epoxy resin) 116 is disposed on the separator 120. At this time, the second seal precursor 116 is positioned so as to face (overlap) the arrangement site of the first seal precursor 114. For example, application using a dispenser is applied to the arrangement of the second seal precursor 116.

  The constituent material of the first seal precursor 114 and the second seal precursor 116 is not limited to the one-component uncured epoxy resin, and a material that exhibits a good sealing effect in the usage environment is appropriately selected according to the application. can do. For example, other thermosetting resins (polypropylene, polyethylene, etc.) and thermoplastic resins can be applied.

  The constituent material of the separator 120 is not limited to polyethylene, and other polyolefins such as polypropylene, resin materials such as polyamide and polyimide can be applied.

  FIG. 13 is a schematic view for explaining a clip mechanism of the holding mechanism according to the electrode setting step shown in FIG. 5, and FIG. 14 is a cross-sectional view for explaining the electrode setting step.

  In the electrode setting step, six bipolar batteries 110 (110A to 110F) are set in the electrode stocker (stacking means) 150 with the negative electrode surface facing up. In the bipolar battery 110F held at the lowest position, the first seal precursor 114, the second seal precursor 116, and the separator 120 are not arranged.

  The electrode stocker (stacking means) 150 includes a holding mechanism, a support structure 154, a cradle 156, a position sensor 158, and a control unit (not shown).

  The holding mechanism has six clip mechanisms 153 that can grip two opposing portions of the outer peripheral portion of the bipolar battery 110, and can set six bipolar batteries 110. The part of the bipolar battery 110 held by the clip mechanism 153 is located in a region having a width of about 10 mm from the outer peripheral end face, and the first seal precursor 114 and the second seal precursor 116 are not arranged. It is a part.

  The clip mechanism 153 is based on elastic force and includes lower and upper arms 191 and 193, a guide block 195, a movable block 197 and a drive rod 198.

  The lower arm 191 has a distal end portion on which the bipolar battery 110 is placed and a base portion that extends from the distal end portion via a lower stepped portion 192. The upper arm 193 has a tip portion that presses the bipolar battery 110, an intermediate portion that extends from the tip portion via the first upward inclined portion, and a base portion that extends from the intermediate portion via the second upward inclined portion 194. . The lower and upper arms 191 and 192 are elastically biased so as to be close to each other, for example, by an elastic member (not shown) made of a spring.

  The guide block 195 is fixed to the base of the lower arm 191 and has a through hole 196. The movable block 197 is disposed between the guide block 195 and the lower step 192 of the lower arm 191, and is elastically biased toward the guide block 195 by, for example, an elastic member (not shown) made of a spring. Yes.

  The drive rod 198 is disposed so as to freely reciprocate, and the diameter of the drive rod 198 is set so as to pass through the through hole 196 of the guide block 195. Accordingly, the tip of the drive rod 198 protruding from the through hole 196 presses the movable block 197 and moves it toward the lower step 192 of the lower arm 191.

  Since the movable block 197 is in contact with the second upper inclined portion 194 of the upper arm 193, the movement of the movable block 197 causes the upper arm 193 to rise.

  That is, when the drive rod 198 is protruded, the tip portions of the lower and upper arms 191 and 192 are separated from each other, so that the bipolar battery 110 can be disposed or released (released). . On the other hand, when the drive rod 198 is retracted, the tip portions of the lower and upper arms 191 and 192 are close to each other, so that the bipolar battery 110 can be gripped. The clip mechanism 153 is not particularly limited to the above configuration as long as the bipolar battery 110 can be gripped.

  The support structure 154 has a frame shape and a holding mechanism attached to avoid interference when the bipolar battery 110 is set. The holding mechanism is attached in a direction (Z-axis direction) perpendicular to the surface direction (XY-axis direction) of the bipolar battery 110 so that the bipolar batteries 110 are aligned and do not contact each other.

  The support structure 154 is provided with Z-axis moving means (not shown) for moving in a vertical direction toward the cradle 156. Since the Z-axis moving means moves the support structure 154 relative to the cradle 156, the installation space can be used effectively. In particular, since the electrode stocker 150 is disposed inside a vacuum processing apparatus 160 (described later), the equipment cost can be reduced by downsizing the vacuum processing apparatus 160.

  When the Z-axis moving means is disposed on the support structure 154, the structure of the cradle 156 and its surroundings can be simplified. However, the Z-axis moving means is disposed on the cradle 156 and supports the cradle 156. It is also possible to move relative to the structure 154. In this case, the support structure 154 is fixed, and the cradle 156 moves inside the support structure 154, so that the support structure 154 can be prevented from shaking.

  The cradle 156 is used to support the stacked bipolar battery 110. The cradle 156 is provided with XY axis moving means (not shown) for moving in the plane direction of the bipolar battery 110. In addition, by making one axial direction of the XY axis moving means coincide with the moving direction of the cradle 156 to the next process, the XY axis moving means can also be used as a moving mechanism for the cradle 156 to the next process. Is also possible.

  The position sensor 158 is disposed at a position corresponding to the four sides of the bipolar battery 110 on the upper surface of the support structure 154 and constitutes a two-dimensional position detection unit. Therefore, the position sensor 158 can detect a positional shift during the relative movement of the bipolar battery 110, that is, during the movement of the bipolar battery 110 toward the cradle 156. As the two-dimensional position detection means, for example, a CCD (solid-state imaging device) image sensor can be used. In this case, the two-dimensional position detection means can be configured by disposing at one of the four corners on the upper surface of the support structure 154.

  The control unit is used to stack the bipolar battery 110 held by the clip mechanism 153. For example, the control unit controls the holding and release of the bipolar battery 110 by the clip mechanism 153 and the detection result of the position sensor 158. Based on the control of the XY axis moving means. Therefore, the position sensor 158 and the XY axis moving unit constitute a correcting unit for correcting a positional deviation when the bipolar battery 110 is relatively moved.

  In the electrolyte layer forming step, 1 ml of the electrolyte is applied to the negative electrodes 112 of the five bipolar batteries 110B to 110F, excluding the bipolar battery 110A held at the top, using, for example, a micropipette. It is infiltrated by putting it on the surface.

The electrolytic solution contains an organic solvent composed of PC (propylene carbonate) and EC (ethylene carbonate), a lithium salt (LiPF ₆ ) as a supporting salt, and a small amount of a surfactant. The lithium salt concentration is 1M.

The organic solvent is not particularly limited to PC and EC, and for example, other cyclic carbonates, chain carbonates such as dimethyl carbonate, and ethers such as tetrahydrofuran can be applied. The lithium salt is not particularly limited to LiPF ₆ , and other inorganic acid anion salts and organic acid anion salts such as LiCF ₃ SO ₃ can be applied.

  15 is a schematic diagram for explaining the vacuum processing apparatus according to the vacuum introduction process to the vacuum release process shown in FIG. 5, and FIG. 16 is a schematic diagram for explaining the electrode stacking process shown in FIG. 17 is a cross-sectional view for explaining the pressing step shown in FIG.

  The vacuum processing apparatus 160 includes a vacuum unit 162, a press unit 172, and a control unit 178.

  The vacuum unit 162 includes a vacuum chamber 163, a vacuum pump 164, and a piping system 165. The vacuum chamber 163 has a detachable (openable) lid, and a fixed base on which the electrode stocker 150 and the press means 172 are arranged. The vacuum pump 164 is, for example, a centrifugal type, and is used to bring the inside of the vacuum chamber 163 into a vacuum state. The piping system 165 is used to connect the vacuum pump 164 and the vacuum chamber 163, and a leak valve (not shown) is arranged.

  The press unit 172 includes a lower press plate 174, an upper press plate 176, a lower heating unit 175, and an upper heating unit 177 that are disposed so as to be close to and away from the lower press plate 174.

  The lower press plate 174 is provided with a receiving base 156 of the electrode stocker 150. The upper press plate 176 is used to press the stacked body of the bipolar batteries 110 in cooperation with the lower press plate 174.

  The lower heating means 175 and the upper heating means 177 have, for example, resistance heating elements and are disposed inside the lower press plate 174 and the upper press plate 176, and raise the temperature of the lower press plate 174 and the upper press plate 176. Used to make.

  The control unit 178 controls the temperature of the upper press plate 176 and the temperature of the lower heating unit 175 and the upper heating unit 177 to perform appropriate heat pressing on the stacked body of the bipolar battery 110 under vacuum. Used to do.

  Note that one of the lower heating unit 175 and the upper heating unit 177 can be omitted, or the lower heating unit 175 and the upper heating unit 177 can be arranged outside the lower press plate 174 and the upper press plate 176. .

  Next, a vacuum introduction process to a vacuum release process to which the vacuum processing apparatus 160 is applied will be sequentially described.

  In the vacuum introduction process, the lid of the vacuum chamber 163 is removed, and the electrode stocker 150 holding the bipolar battery 110 is disposed at the base of the vacuum chamber 163. When the lid of the vacuum chamber 163 is attached and the vacuum chamber 163 is sealed, the vacuum pump 164 is operated and the inside of the vacuum chamber 163 is evacuated.

  In the electrode stacking step, the support structure 154 of the electrode stocker 150 is moved toward the cradle 156 under vacuum by the Z-axis moving means. That is, the holding mechanism (clip mechanism 153) and the cradle 156 are relatively moved by the Z-axis moving unit in the direction perpendicular to the surface direction of the bipolar battery 110. Since the relative movement suppresses the shake of the bipolar battery 110, the bipolar battery 110 is stacked with high accuracy.

  Then, when the bipolar battery 110 held by the clip mechanism 153 of the support structure 154 comes into contact with the cradle 156, the drive rod 198 of the clip mechanism 153 is controlled to cancel the holding of the bipolar battery 110. .

  On the other hand, when the position sensor 158 detects a positional shift during the relative movement of the bipolar battery 110, the XY axis moving means is controlled, and the position in the surface direction of the cradle 156 is adjusted. This further improves the stacking accuracy. Further, since the cradle 156 is irrelevant to the holding mechanism, the movement of the cradle 156 does not affect the position of the bipolar battery 110 and the positional deviation can be easily adjusted.

  Then, by continuing the movement of the support structure 154 with respect to the cradle 156, the bipolar batteries 110F to 110A are sequentially stacked.

  As described above, blurring of the bipolar battery 110 is suppressed, and the bipolar batteries can be stacked with high accuracy. Therefore, the occurrence of displacement between the bipolar electrode and the electrolyte layer constituting the bipolar battery 110 is suppressed and the occurrence of an internal short circuit can be avoided, so that the occurrence of defective products can be reduced.

  In addition, since the layers are stacked under vacuum, mixing of bubbles with respect to the stack interface between the electrode and the electrolyte layer is suppressed. Therefore, the movement of ions during use is not harmed and the battery resistance does not increase, so that a high output density can be achieved. That is, since a bipolar battery in which the mixing of bubbles is suppressed is obtained, the movement of ions during use is not harmed, and the battery resistance does not increase, so that a high output density can be achieved.

  Note that the XY-axis moving means is not limited to being disposed on the cradle 156, and by placing it on the holding mechanism, the structure of the cradle 156 and the vicinity thereof can be simplified. Further, the Z-axis moving means can be arranged in the clip mechanism 153.

In the pressing process, the cradle 156 of the electrode stocker 150 is disposed on the lower press plate 174. At this time, the pedestal 156 holds the stacked body 100 of the bipolar batteries 110 formed by the electrode stacking process. The upper press plate 176 descends toward the lower press plate 174, presses the stacked body 100, and applies a surface pressure of 1.0 × 10 ⁵ Pa.

  On the other hand, the lower heating means 175 and the upper heating means 177 are operated to heat the laminate of the bipolar battery 110 via the lower press plate 174 and the upper press plate 176. The laminated body of the bipolar battery 110 is heated to 80 ° C., which is the curing temperature of the one-component uncured epoxy resin constituting the first seal precursor 114 and the second seal precursor 116.

The first seal precursor 114 and the second seal precursor are maintained for 1 hour under the pressing conditions (surface pressure 1.0 × 10 ⁵ Pa and 80 ° C.) while maintaining the vacuum state in the electrode lamination step. 116 hardens | cures, the 1st seal | sticker 115 and the 2nd seal | sticker 117 of predetermined thickness are formed, and the laminated body 100 is obtained.

  As described above, since the presses are laminated under vacuum, it is possible to suppress the purge gas from being mixed into the lamination interface. Further, by controlling the distance between the lower press plate 174 and the upper press plate 176 during pressing and setting the thickness of the laminate 100 to a predetermined value, it is possible to reduce the volume and the electrolyte resistance. .

  Moreover, since it is a heating press, the first seal precursor 114 and the second seal precursor 116 are cured simultaneously, so that the manufacturing process can be shortened.

  In the vacuum release process, the vacuum pump 164 is stopped, and the vacuum state of the vacuum chamber 163 is released by opening the leak valve. The upper press plate 176 is raised, and the lid of the vacuum chamber 163 is removed. The cradle 156 of the electrode stocker 150 disposed on the lower press plate 174 is taken out while holding the laminated body 100. Further, parts of the electrode stocker 150 other than the cradle 156 are also taken out.

  In the bipolar battery stack 100, the terminal plates 101 and 102 are then disposed at the uppermost and lowermost positions and accommodated in the outer case 104 (see FIGS. 1 and 2).

  FIG. 18 is a chart for explaining the internal short-circuit test result of the bipolar battery according to the first embodiment.

  The first embodiment and the comparative example were targeted, and evaluation was performed using a voltage measured in the first hour after the completion of the initial charge. The evaluation criterion is the presence or absence of a significant decrease in voltage. The symbols OK and NG represent those that do not have a significant drop in voltage and those that have a voltage, respectively. The numbers are the numbers evaluated as OK or NG when the number of samples is 10. The comparative example is a bipolar battery manufactured without using the manufacturing apparatus according to the first embodiment. The initial charge condition is 4 hours at 21V-0.5C.

  As shown in FIG. 18, the first embodiment is not evaluated as NG, and four comparative examples are NG. Moreover, as a result of conducting a disassembly investigation on the comparative example evaluated as NG, a short circuit due to electrode displacement was confirmed. That is, in the first embodiment, the generation of defective products is suppressed and the yield is improved as compared with the comparative example.

  FIG. 19 is a schematic diagram for explaining a modification according to the first embodiment.

  In order to improve the output density of the battery, it is possible to divide the pressing process into two parts, a first pressing process and a second pressing process, and to insert an initial charging process for removing bubbles generated by the initial charging. The initial charging condition is, for example, 4 hours at 21 V-0.5 C on a capacity basis estimated from the coating weight of the positive electrode.

  In this case, the charge / discharge device 180 is disposed in the vacuum processing device 160. The charging / discharging device 180 is configured to be electrically connected to the stacked body 100 via the lower press plate 174 and the upper press plate 176 of the press means 172.

The pressing condition of the first pressing step is holding for 60 seconds at a surface pressure of 1.0 × 10 ⁵ Pa and a normal temperature. The pressing condition of the second pressing step is holding for 1 hour at a surface pressure of 1.0 × 10 ⁵ Pa and 80 ° C. In addition, the press conditions of a 1st press process are not specifically limited, Considering the press conditions of a 2nd press process, it sets so that a 1st seal precursor and a 2nd seal precursor may not harden | cure.

  As described above, the first embodiment can provide a method and an apparatus for manufacturing an electrolyte-based bipolar battery that can achieve a good yield.

  In addition, it is also possible to laminate | stack alternately with a bipolar type electrode (bipolar type | mold battery with no electrolyte layer arrange | positioned) by making an electrolyte layer (separator) into a different body. In this case, the holding mechanism holds the electrolyte layer and the bipolar electrode alternately, and is aligned with respect to the plane direction of the bipolar electrode and the electrolyte layer so that the bipolar electrode and the electrolyte layer are aligned and do not contact each other. And attached to the support structure 154 in a perpendicular direction.

  In addition, the electrode setting process is preferably performed in the atmosphere in consideration of the installation process and the like, but may be performed in a vacuum as necessary.

  It is also possible to have a preheating step for preheating the bipolar battery 110, the laminate 100, or the lower and upper press plates 174, 176 before the pressing step. In this case, it is possible to shorten the time of the pressing process.

  The preheating of the bipolar battery 110 is performed, for example, by placing the entire electrode stocker 150 holding the bipolar battery 110 in an oven and raising the temperature.

  Preheating of the laminated body 100 is performed by, for example, incorporating a heating unit in the cradle 156 on which the laminated body 100 is disposed, and raising the temperature of the cradle 156 by the heating unit. Further, it is also possible to preheat the stacked body 100 by placing the cradle 156 on the lower press plate 174, raising the temperature by the lower heating means 175, and then incorporating it into the electrode stocker 150. .

  The preheating of the lower and upper press plates 174 and 176 is performed, for example, by operating the lower heating means 175 and the upper heating means 177 before the cradle 156 is arranged.

  Next, a second embodiment will be described. In the following, members having the same functions as those in the first embodiment are denoted by similar reference numerals, and the description thereof is omitted to avoid duplication.

  FIG. 20 is a process diagram for explaining the bipolar battery manufacturing method according to the second embodiment.

  The bipolar battery according to Embodiment 2 is a gel polymer electrolyte system, and the manufacturing method thereof includes an electrode formation process, an electrolyte layer formation process, a seal precursor formation process, an electrode setting process, a vacuum introduction process, an electrode lamination process, It has a press process and a vacuum release process.

  Next, each step will be described sequentially. FIG. 21 is a cross-sectional view for explaining the seal precursor arranging step shown in FIG. 20, and FIG. 22 is a cross-sectional view for explaining the electrode setting step shown in FIG.

  In the electrode formation step, as in the first embodiment, a bipolar electrode in which the positive electrode 213 and the negative electrode 212 are formed on one surface and the other surface of the current collector 211 (bipolar type in which no electrolyte layer is formed) A battery 210) is obtained.

  In the electrolyte layer forming step, an electrolyte is applied to the electrode portions of the positive electrode 213 and the negative electrode 212.

  The electrolyte has an electrolytic solution [90% by weight] and a host polymer [10% by weight], and has a viscosity suitable for coating by adding a viscosity adjusting solvent.

The electrolytic solution contains an organic solvent composed of PC (propylene carbonate) and EC (ethylene carbonate), and a lithium salt (LiPF ₆ ) as a supporting salt. The lithium salt concentration is 1M.

  The host polymer is PVDF-HFP (copolymer of polyvinylidene fluoride and hexafluoropropylene) containing 10% of HFP (hexafluoropropylene) copolymer. The viscosity adjusting solvent is DMC (dimethyl carbonate).

  The electrolyte applied to the electrode part is dried and the DMC is volatilized to form gel polymer electrolyte layers 218 and 219 on the positive electrode 213 and the negative electrode 212.

  The host polymer is not limited to PVDF-HFP, and other polymers that do not have lithium ion conductivity or polymers that have ion conductivity (solid polymer electrolyte) can also be applied. Other polymers having no lithium ion conductivity are, for example, PAN (polyacrylonitrile) and PMMA (polymethyl methacrylate). Examples of the polymer having ion conductivity include PEO (polyethylene oxide) and PPO (polypropylene oxide). The viscosity adjusting solvent is not limited to DMC.

  In the seal precursor forming step, the first seal precursor 214, the separator 220, and the second seal precursor 216 are arranged as in the first embodiment.

  In the electrode setting step, an electrode stocker 250 having a holding mechanism (clip mechanism 253), a support structure 154, a cradle 156, a position sensor 158, and a control unit (not shown) is used, as in the first embodiment. In addition, six bipolar batteries 210 (210A to 210F) are set in the electrode stocker 250 with the negative electrode face up. Note that the bipolar battery 210F held at the lowest level does not include the gel polymer electrolyte layer 218 on the positive electrode side, the first seal precursor 214, the second seal precursor 216, and the separator 220.

  In the vacuum introduction process, by using a vacuum processing apparatus having a vacuum unit, a press unit, and a control unit, the electrode stocker holding the bipolar battery 210 is connected to the base of the vacuum chamber as in the first embodiment. When placed in the vacuum chamber, the inside of the vacuum chamber is maintained in a vacuum state.

  In the electrode stacking step, the holding mechanism (clip mechanism 253) and the cradle 256 are relatively moved by a Z-axis moving unit in a direction perpendicular to the surface direction of the bipolar battery 210 under vacuum. Since the relative movement suppresses the shake of the bipolar battery 210, the bipolar battery 210 is stacked with high accuracy.

  Then, when the bipolar battery 210 held by the clip mechanism 253 of the support structure 254 comes into contact with the cradle 256, the drive rod of the clip mechanism 253 is controlled, and the holding of the bipolar battery 210 is canceled.

  On the other hand, when the position sensor 258 detects a positional shift at the time of relative movement of the bipolar battery 210, the XY axis moving means is controlled, and the position in the surface direction of the cradle 256 is adjusted. This further improves the stacking accuracy. Further, since the cradle 256 is not related to the holding mechanism, the movement of the cradle 256 does not affect the position of the bipolar battery 210, and the positional deviation can be easily adjusted.

  Then, by continuing the movement of the support structure 254 with respect to the cradle 256, the bipolar batteries 210F to 210A are sequentially stacked.

  As described above, blurring of the bipolar battery 210 is suppressed, and the bipolar batteries can be stacked with high accuracy. Therefore, the occurrence of displacement between the bipolar electrode and the electrolyte layer constituting the bipolar battery 210 is suppressed and the occurrence of an internal short circuit can be avoided, so that the occurrence of defective products can be reduced.

  In addition, since the layers are stacked under vacuum, mixing of bubbles with respect to the stack interface between the electrode and the electrolyte layer is suppressed. As a result, a bipolar battery in which mixing of air bubbles is suppressed is obtained, and movement of ions during use is not harmed and battery resistance does not increase, so that a high output density can be achieved.

In the pressing step, the laminated body 200 is heated and pressed while maintaining a vacuum state. The pressing conditions are 1 hour holding at a surface pressure of 1.0 × 10 ⁵ Pa and 80 ° C. Thereby, the first seal precursor and the second seal precursor are cured, and the first seal and the second seal having a predetermined thickness are formed. Further, the gel polymer electrolyte layers 218 and 219 are plasticized and have a predetermined thickness.

  In addition, since the pressing is performed under heating, the first seal precursor 214 and the second seal precursor 216 are cured and the gel polymer electrolyte layers 218 and 219 are completed at the same time, so that the manufacturing process can be shortened. it can.

  In the vacuum releasing step, the vacuum state of the vacuum chamber is released and the stacked body 200 is taken out.

  As described above, Embodiment 2 can provide a gel polymer electrolyte bipolar battery manufacturing method and manufacturing apparatus that can achieve a good yield.

  In addition, the internal short circuit test result of the bipolar battery according to the second embodiment is the same as that of the first embodiment shown in FIG. 18, and the occurrence of defective products is suppressed as compared with the comparative example, and the yield is high. It has improved.

  In addition, since the gel polymer electrolyte layers 218 and 219 are of a thermoplastic type in which an electrolytic solution is held in a polymer skeleton, it is possible to prevent leakage and prevent a liquid junction and constitute a highly reliable bipolar battery. is there. The gel polymer electrolyte is not limited to the thermoplastic type, and a thermoplastic type can also be applied. Also in this case, leakage is prevented and a liquid junction can be prevented.

  Next, a third embodiment will be described.

  FIG. 23 is a process diagram for explaining the manufacturing method of the bipolar battery according to the third embodiment.

  The bipolar battery according to Embodiment 3 is an all-solid electrolyte system, and the manufacturing method thereof includes an electrode forming process, an electrolyte layer forming process, an electrode setting process, a vacuum introducing process, an electrode stacking process, a pressing process, and a vacuum releasing process. Have

  Next, each step will be described sequentially. 24 is a cross-sectional view for explaining the formation of the solid electrolyte layer shown in FIG. 23, FIG. 25 is a cross-sectional view for explaining the formation of the electrode setting step shown in FIG. 23, and FIG. It is the schematic for demonstrating the vacuum processing apparatus which concerns on the form 3.

  In the electrode forming step, first, the positive electrode slurry is adjusted. The positive electrode slurry comprises a positive electrode active material [22% by weight], a conductive auxiliary agent [6% by weight], a polymer [18% by weight], a lithium salt [9% by weight] as a supporting salt, and a slurry viscosity adjusting solvent [45% by weight]. And a small amount of a polymerization initiator.

The positive electrode active material is LiMn ₂ O ₄ . The conductive auxiliary agent is acetylene black. The polymer is polyethylene oxide (PEO). The lithium salt is Li (C ₂ F ₅ SO ₂ ) ₂ N. The slurry viscosity adjusting solvent is NMP. The polymerization initiator is AIBN (azobisisobutyronitrile).

  The positive electrode slurry is applied to one surface of a current collector 311 made of stainless steel foil. The coating film of the positive electrode slurry is held at 110 ° C. for 4 hours using an oven, for example, and cured by thermal polymerization, whereby the positive electrode 313 made of the positive electrode active material layer is formed.

  Next, the negative electrode slurry is adjusted. The negative electrode slurry comprises a negative electrode active material [14% by weight], a conductive auxiliary agent [4% by weight], a polymer [20% by weight], a lithium salt [11% by weight] as a supporting salt, and a slurry viscosity adjusting solvent [51% by weight]. And a small amount of a polymerization initiator.

The negative electrode active material is Li ₄ Ti ₅ O ₁₂ . The conductive auxiliary agent is acetylene black. The polymer is PEO. The lithium salt is Li (C ₂ F ₅ SO ₂ ) ₂ N. The slurry viscosity adjusting solvent is NMP. The polymerization initiator is AIBN.

  The negative electrode slurry is applied to the other surface of the current collector 311. The coating film of the negative electrode slurry is held at 110 ° C. for 4 hours using an oven, for example, and is cured by thermal polymerization, whereby the negative electrode 312 including the negative electrode active material layer is formed.

  As a result, a bipolar electrode in which the positive electrode 313 and the negative electrode 312 are respectively formed on one surface and the other surface of the current collector 311 (bipolar battery 310 without an electrolyte layer) is obtained.

  The bipolar battery 310 is cut to a size of 330 × 250 (mm). The outer peripheral portions of the positive electrode 313 and the negative electrode 312 are peeled off with a width of 10 mm in order to expose the current collector 311.

  In the electrolyte layer forming step, first, a solid electrolyte slurry is prepared. The solid electrolyte slurry contains a polymer [64.5% by weight] and a lithium salt [35.5% by weight] as a supporting salt, and has a predetermined viscosity by a viscosity adjusting solvent.

The polymer is PEO. The lithium salt is Li (C ₂ F ₅ SO ₂ ) ₂ N. The viscosity adjusting solvent is acetonitrile. The polymer is not limited to PEO, and other solid polymer electrolytes (for example, PPO) and inorganic solid electrolytes having ion conductivity such as ceramics can also be applied.

  The solid electrolyte slurry is applied only to the electrode portion of the positive electrode 313. By drying the coating layer of the solid electrolyte slurry, the viscosity adjusting solvent is volatilized, and a 40 μm all solid electrolyte layer 339 is formed. In the all solid electrolyte layer 339, there is no leakage, and a highly reliable bipolar battery can be configured.

  On the other hand, an insulating material 315 is disposed on the outer periphery of the positive electrode side of the bipolar battery 310 where the current collector 311 is exposed. The insulating material 315 is, for example, a polyimide Kapton (registered trademark) tape.

  In the electrode setting process, an electrode stocker 350 having a holding mechanism (clip mechanism 353), a support structure 354, a cradle 356, a position sensor 358, and a control unit (not shown) is used, as in the first embodiment. In addition, six bipolar batteries 310 (310A to 310F) are set in the electrode stocker 350 with the negative electrode face up. Note that the bipolar battery 310F held at the lowest level does not include the positive electrode 313, the all solid electrolyte layer 339, and the insulating material 315. The bipolar battery 310 </ b> A held at the top does not have the negative electrode 312.

  In the vacuum introduction process, by using the vacuum processing device 360 having the vacuum means 362, the press means 372, and the control unit 378, the electrode stocker 350 holding the bipolar battery 310 is formed as in the first embodiment. When arranged at the base of the vacuum chamber 363, the inside of the vacuum chamber 363 is maintained in a vacuum state.

  In the electrode stacking step, the holding mechanism (clip mechanism 353) and the cradle 356 are relatively moved by a Z-axis moving unit in a direction perpendicular to the surface direction of the bipolar battery 310 under vacuum. Since the relative movement suppresses the shake of the bipolar battery 310, the bipolar battery 310 is accurately stacked.

  Then, when the bipolar battery 310 held by the clip mechanism 353 of the support structure 354 comes into contact with the cradle 356, the drive rod of the clip mechanism 353 is controlled, and the holding of the bipolar battery 310 is canceled.

  On the other hand, when the position sensor 358 detects a positional shift during the relative movement of the bipolar battery 310, the XY-axis moving means is controlled, and the position in the surface direction of the cradle 356 is adjusted. This further improves the stacking accuracy. Further, since the cradle 356 is not related to the holding mechanism, the movement of the cradle 356 does not affect the position of the bipolar battery 310, and the positional deviation can be easily adjusted.

  Then, by continuing the movement of the support structure 354 with respect to the cradle 356, the bipolar batteries 210F to 210A are sequentially stacked.

  As described above, blurring of the bipolar battery 310 is suppressed, and the bipolar batteries can be stacked with high accuracy. Therefore, the occurrence of displacement between the bipolar electrode and the electrolyte layer constituting the bipolar battery 310 is suppressed and the occurrence of an internal short circuit can be avoided, so that the occurrence of defective products can be reduced.

  In addition, since the layers are stacked under vacuum, mixing of bubbles with respect to the stack interface between the electrode and the electrolyte layer is suppressed. As a result, a bipolar battery in which mixing of air bubbles is suppressed is obtained, and movement of ions during use is not harmed and battery resistance does not increase, so that a high output density can be achieved.

In the pressing step, the laminated body 300 is pressed in a state where a vacuum state is maintained. The pressing condition is a holding for 3 minutes at a surface pressure of 1.0 × 10 ⁵ Pa and a normal temperature. As a result, the negative electrode 312 and the all solid electrolyte layer 339 are in close contact with each other. In the pressing process according to the third embodiment, since no heating press is applied, the lower press plate 374 and the upper press plate 376 of the press unit 372 of the vacuum processing apparatus 360 are not provided with a heating unit. Reference numerals 364 and 365 denote a vacuum pump and a piping system.

  In the vacuum releasing step, the vacuum state of the vacuum chamber 363 is released and the stacked body 300 is taken out.

  As described above, Embodiment 3 can provide a manufacturing method and a manufacturing apparatus of an all-solid electrolyte bipolar battery that can achieve a good yield.

  In addition, the internal short circuit test result of the bipolar battery according to the third embodiment is the same as that of the first embodiment shown in FIG. 18, and the occurrence of defective products is suppressed as compared with the comparative example, and the yield is increased. It has improved. However, initial charge conditions are 4 hours at 12.5V-0.5C. Further, as a result of conducting a disassembly investigation on the comparative example evaluated as NG, a seal failure due to electrode displacement was confirmed.

  The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the claims.

  For example, it is possible to improve the output density of the battery by applying the modification (the first charging step and the charging / discharging device) according to the first embodiment to the second and third embodiments. The initial charging condition according to Embodiment 3 is, for example, a capacity base estimated from the coating weight of the positive electrode and is 2.5 V-0.5 C for 4 hours.

1 is a perspective view for explaining a bipolar battery according to Embodiment 1. FIG. 4 is a cross-sectional view for explaining the bipolar battery according to Embodiment 1. FIG. It is a perspective view for demonstrating the assembled battery using the bipolar battery shown by FIG. It is the schematic of the vehicle by which the assembled battery shown by FIG. 3 is mounted. FIG. 3 is a process diagram for explaining the manufacturing method of the bipolar battery according to the first embodiment. It is a front view for demonstrating the positive electrode which concerns on the electrode formation process shown by FIG. It is a rear view for demonstrating the negative electrode which concerns on the electrode formation process shown by FIG. It is sectional drawing regarding line VIII-VIII of FIG. It is a front view for demonstrating the 1st seal precursor of the seal precursor arrangement | positioning process shown by FIG. It is sectional drawing regarding line XX of FIG. It is a front view for demonstrating the 2nd seal precursor of the seal precursor arrangement | positioning process shown by FIG. It is sectional drawing regarding the line XII-XII of FIG. It is the schematic for demonstrating the clip mechanism of the holding mechanism which concerns on the electrode setting process shown by FIG. It is sectional drawing for demonstrating an electrode setting process. It is the schematic for demonstrating the vacuum processing apparatus which concerns on the vacuum introduction process-vacuum release process shown by FIG. It is the schematic for demonstrating the electrode lamination process shown by FIG. It is sectional drawing for demonstrating the press process shown by FIG. 4 is a chart for explaining the internal short-circuit test result of the bipolar battery according to Embodiment 1. FIG. FIG. 6 is a schematic diagram for explaining a modified example according to the first embodiment. FIG. 6 is a process diagram for explaining the manufacturing method of the bipolar battery according to the second embodiment. It is sectional drawing for demonstrating the seal | sticker precursor arrangement | positioning process shown by FIG. It is sectional drawing for demonstrating the electrode setting process shown by FIG. FIG. 10 is a process diagram for explaining the manufacturing method of the bipolar battery according to the third embodiment. It is sectional drawing for demonstrating formation of the solid electrolyte layer shown by FIG. FIG. 24 is a cross-sectional view for explaining the formation of the electrode setting step shown in FIG. 23. FIG. 6 is a schematic diagram for explaining a vacuum processing apparatus according to a third embodiment.

Explanation of symbols

100 ... Laminated body,
101, 102 ... Terminal plate,
104 .. Exterior case,
110 (110A to 110F) .. Bipolar battery,
111 .. current collector,
112 .. Negative electrode,
113 .. Positive electrode,
114 .. First seal precursor,
115 .. First seal,
116 .. Second seal precursor,
117 .. second seal,
120 .. separator
130..Battery,
132,134 ... conductive bar,
140..Battery module,
145 ... Vehicle,
150 .. electrode stocker,
153 .. Clip mechanism,
154 .. Support structure,
156 ... the cradle,
158 .. Position sensor,
160 ... Vacuum processing equipment,
162..Vacuum means,
163 ... Vacuum chamber,
164 ... Vacuum pump
165 ... Piping system
172 ..Pressing means,
174 ... Lower press plate,
175 .. Lower heating means,
176 .. Upper press plate,
177 .. Upper heating means,
178 .. Control part,
180 .. charge / discharge device,
191, lower arm,
192 ... Lower step,
193..Upper arm,
194 .. second upward inclined portion,
195 ... Guide block,
196 .. through hole,
197 · · movable block,
198 ・ ・ Drive rod,
200 ... Laminated body,
210 .. Bipolar battery,
210 (210A to 210F) .. Bipolar battery,
211 .. current collector,
212 .. Negative electrode,
213 .. Positive electrode,
214 .. First seal precursor,
216 .. Second seal precursor,
218, 219 .. Gel polymer electrolyte layer,
220 .. separator
250 .. Electrode stocker,
253 .. Clip mechanism,
254 .. Support structure,
256 .. The cradle,
258 .. Position sensor,
300 ... Laminated body,
310 (310A to 310F) .. Bipolar battery,
311 ... current collector,
312 .. Negative electrode,
313 .. Positive electrode,
315..Insulating material,
339..All solid electrolyte layer,
350 .. Electrode stocker,
353 .. Clip mechanism,
354 .. Support structure,
356 ... the cradle,
358 .. Position sensor,
360 ... Vacuum processing equipment,
362..Vacuum means,
363..Vacuum chamber
364 ... Vacuum pump
365 ... Piping system
372 ... Pressing means,
374 ... Lower press plate,
376 .. Upper press plate,
378 .. Control unit.

Claims (20)

A bipolar electrode having a current collector, a positive electrode comprising a positive electrode active material layer disposed on one surface of the current collector, and a negative electrode comprising a negative electrode active material layer disposed on the other surface of the current collector; A stacking means for alternately stacking a plurality of separate electrolyte layers;
The laminating means includes
A holding mechanism capable of alternately holding the bipolar electrode and the electrolyte layer;
A support structure to which the holding mechanism is attached;
A cradle in which a laminate of the bipolar electrode and the electrolyte layer is disposed; and
Z-axis moving means for relatively moving the holding mechanism and the cradle in a direction perpendicular to the surface direction of the bipolar electrode and the electrolyte layer so as to be close to and away from each other;
The holding mechanism is
The bipolar electrode and the electrolyte layer is gripped by the holding mechanism, so as not to contact with each other, are arranged in the vertical direction, and said electrolyte layer, and the positive active material layer of the bipolar electrode, The negative electrode active material layer is aligned with respect to the vertical direction.
An apparatus for manufacturing a bipolar battery, wherein the apparatus is attached to the support structure. A bipolar electrode having a current collector, a positive electrode comprising a positive electrode active material layer disposed on one surface of the current collector, and a negative electrode comprising a negative electrode active material layer disposed on the other surface of the current collector; Having a stacking means for stacking a plurality of bipolar batteries having the positive electrode or the electrolyte layer disposed on the negative electrode;
The laminating means includes
A holding mechanism capable of gripping the bipolar battery;
A support structure to which the holding mechanism is attached;
A cradle on which the laminate of bipolar batteries is disposed; and
Z-axis moving means for relatively moving the holding mechanism and the cradle in a direction perpendicular to the plane direction of the bipolar battery so as to be close to and away from each other;
The holding mechanism is
The bipolar battery which is gripped by the holding mechanism, so as not to contact with each other, are arranged in the vertical direction, and the positive active material layer of the bipolar battery, the negative active material layer and the electrolyte layer To be aligned with respect to the vertical direction,
An apparatus for manufacturing a bipolar battery, wherein the apparatus is attached to the support structure.   The bipolar battery manufacturing apparatus according to claim 2, wherein the holding mechanism includes a clip mechanism capable of gripping an outer peripheral portion of the bipolar battery based on an elastic force.   4. The bipolar battery manufacturing apparatus according to claim 2, further comprising a correction unit configured to correct a positional shift in the relative movement of the bipolar battery. 5. The correcting means is
Two-dimensional position detection means for detecting the position of the bipolar battery with respect to the plane direction; and
5. The bipolar type according to claim 4, further comprising: an XY axis moving means for moving the bipolar battery or the cradle in the plane direction based on a detection result of the two-dimensional position detecting means. Battery manufacturing equipment.   The said XY-axis moving means is arrange | positioned at the said cradle, The said cradle moves to the said surface direction based on the detection result of the said two-dimensional position detection means. Bipolar battery manufacturing equipment.   6. The XY axis moving means is disposed on the support structure, and the support structure moves in the surface direction based on a detection result of the two-dimensional position detection means. An apparatus for manufacturing a bipolar battery according to 1. The Z-axis moving means is disposed on the cradle, and the cradle moves inside the support structure toward the bipolar battery gripped by the holding mechanism. Item 8. The bipolar battery manufacturing apparatus according to any one of Items 2 to 7.   The bipolar apparatus according to claim 2, wherein the Z-axis moving unit is disposed on the support structure, and the support structure moves toward the cradle. Type battery manufacturing equipment.   The bipolar battery manufacturing apparatus according to any one of claims 2 to 9, further comprising vacuum means for holding the stacking means under vacuum. A bipolar electrode having a current collector, a positive electrode comprising a positive electrode active material layer disposed on one surface of the current collector, and a negative electrode comprising a negative electrode active material layer disposed on the other surface of the current collector; A stacking step for alternately stacking a plurality of separate electrolyte layers;
In the lamination step,
The bipolar electrode and the electrolyte layer are arranged in a direction perpendicular to the surface direction of the bipolar electrode and the electrolyte layer so as not to contact each other, and the electrolyte layer and the bipolar electrode The positive electrode active material layer and the negative electrode active material layer are arranged so as to be aligned with respect to the vertical direction,
The bipolar electrode and the electrolyte layer are moved relative to each other so as to sequentially approach the cradle with respect to the vertical direction,
The bipolar electrode and the electrolyte layer are sequentially arranged on the cradle, and the bipolar electrode and the electrolyte layer are alternately stacked. A method of manufacturing a bipolar battery, comprising: A bipolar electrode having a current collector, a positive electrode comprising a positive electrode active material layer disposed on one surface of the current collector, and a negative electrode comprising a negative electrode active material layer disposed on the other surface of the current collector; A stacking step for stacking a plurality of bipolar batteries having the positive electrode or the electrolyte layer disposed on the negative electrode;
In the lamination step,
The bipolar batteries are arranged in a direction perpendicular to the surface direction of the bipolar battery so as not to contact each other, and the positive electrode active material layer, the negative electrode active material layer, and the electrolyte of the bipolar battery Arrange the layers so that they are aligned with respect to said vertical direction;
The bipolar battery is moved relative to the cradle sequentially with respect to the vertical direction,
The bipolar battery is sequentially arranged on the cradle, and the bipolar batteries are stacked. A method of manufacturing a bipolar battery, comprising: Grip the outer periphery of the bipolar battery based on elastic force,
13. The method of manufacturing a bipolar battery according to claim 12, wherein gripping by the elastic force is canceled each time the bipolar battery is sequentially arranged on the cradle.   The method for manufacturing a bipolar battery according to claim 12 or 13, wherein a positional shift in the relative movement of the bipolar battery is corrected. The positional deviation is corrected by moving the bipolar battery or the cradle in the plane direction based on a detection result of the position of the bipolar battery in the plane direction. The manufacturing method of the bipolar battery of description.   The bipolar battery manufacturing method according to claim 15, wherein the displacement is corrected by moving the cradle in the surface direction. The method of manufacturing a bipolar battery according to claim 15, wherein the displacement is corrected by moving the bipolar battery in the plane direction. The bipolar battery according to any one of claims 12 to 17, wherein the cradle is moved in a support structure in which the bipolar battery is disposed toward the bipolar battery. Production method. The method for manufacturing a bipolar battery according to any one of claims 12 to 17, wherein the bipolar battery is moved toward the cradle.   The bipolar battery manufacturing method according to any one of claims 12 to 19, wherein the stacking step is performed under vacuum.

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