Stacked electrode assembly and power storage module

Abstract

The laminated electrode body extends in a second direction perpendicular to a first direction, which is the lamination direction between each electrode and each separator. The first and second surfaces of the metal foil of each electrode have an active material coated area and an active material uncoated area extending in the second direction. The active material uncoated area of ​​the second surface is located on the other side of the active material uncoated area of ​​the first surface. The active material uncoated area of ​​the second surface has a first resin placement area where resin is placed and is also located on the side of the active material coated area of ​​the second surface. Between the end of the active material uncoated area of ​​the second surface in the third direction perpendicular to the first and second directions and the separator, a space is formed on the side of the first resin placement area.

Description

Technology Field

[0001] The present disclosure relates to a stacked electrode body and a capacitor module. Background Technology

[0002] Conventionally, a capacitor module is known. In Japanese Patent Publication No. 2022-65369, a capacitor device is disclosed as such a capacitor module, which is intended to shorten the time required for impregnation of an electrolyte. The capacitor device is configured to include a cell stack formed by stacking a plurality of capacitor cells in a stacking direction. Each capacitor cell is provided with a main liquid pipe that communicates the inside and outside of the capacitor cell. The main liquid pipe has a main liquid port provided to penetrate a spacer, a first internal path extending along the short side when viewed in the stacking direction, and a second internal path extending from the short side of the positive electrode active material layer toward the short side when viewed in the stacking direction. Each of the first internal path and the second internal path is provided with a discharge hole facing the positive electrode active material layer.

[0003] The spacer is positioned between the current collector of the positive electrode and the current collector of the negative electrode, and is bonded to the current collector of the positive electrode and the current collector of the negative electrode so as to surround the active material layer and the negative active material layer when viewed in the stacking direction. Specifically, the spacer forms a receiving space surrounded by the spacer, the current collector of the positive electrode, and the current collector of the negative electrode. In the receiving space, a separator, a positive electrode active material layer, and a negative electrode active material layer are received in a state impregnated with an electrolyte. The spacer also functions as a sealing part that seals the receiving space between the current collector of the positive electrode and the current collector of the negative electrode, and prevents the electrolyte contained in the receiving space from leaking out.

[0004] In the battery cell of Japanese Patent Publication No. 2022-65369, the electrolyte injected from the injection port selectively passes through the first internal path and the second internal path, and is also discharged into the receiving space through each discharge port. In the battery cell, since the first internal path and the second internal path are formed within the receiving space, it is necessary to secure a place to install the first internal path and the second internal path within the receiving space. Therefore, in the energy storage module of Japanese Patent Publication No. 2022-65369 which includes a plurality of such battery cells, a decrease in volumetric energy density cannot be avoided.

[0005] The present disclosure provides a stacked electrode body having excellent impregnation properties of an electrolyte and capable of suppressing a decrease in volumetric energy density in a capacitor module, and a capacitor module having said stacked electrode body.

[0006] According to one aspect of the present disclosure, a laminated electrode body comprises a plurality of electrodes and a plurality of separators. Each electrode and each separator are alternately laminated in a first direction. The laminated electrode body extends in a second direction perpendicular to the first direction. Each electrode comprises a metal foil having a first surface and a second surface on the back side of the first surface. Each first surface and each second surface have an active material coated region that extends in the second direction and is coated with an active material, and an active material uncoated region that is continuous with the active material coated region in the second direction and is not coated with an active material. The active material uncoated region of the second surface is located on the back side of the active material uncoated region of the first surface in the metal foil. The active material uncoated region of the second surface has a first resin placement region in which a resin is disposed and which is located on the side of the active material coated region of the second surface. A first space is formed on the first resin placement area side between the end of the third direction perpendicular to the first and second directions in the active material uncoated area of ​​the second surface and the separator.

[0007] According to this configuration, it becomes possible to impregnate the electrolyte into the interior of the stacked electrode through each first space. That is, each first space can be used as a supply path for the electrolyte. Therefore, there is no need to provide a channel for guiding the electrolyte within the receiver that accommodates the stacked electrode. Consequently, the stacked electrode has excellent electrolyte impregnation properties, and it is also possible to suppress the decrease in volumetric energy density in a capacitor module comprising the stacked electrode and the receiver.

[0008] Preferably, the resin is in contact with the separator. The length of the third direction of the first resin placement area is shorter than the length of the third direction of the metal foil.

[0009] According to this configuration, it is possible to form each first space in the stacked electrode body.

[0010] Preferably, a resin spacer is placed between the resin and the separator.

[0011] According to this configuration, it is possible to form each first space in the stacked electrode body.

[0012] Preferably, the active material uncoated area of ​​the first surface has a resin disposed therein and a second resin disposed area located on the side of the active material coated area of ​​the first surface. Between the third end of the active material uncoated area of ​​the first surface and the separator, a second space is formed on the side of the second resin disposed area.

[0013] With this configuration, it becomes possible to impregnate the electrolyte into the interior of the laminated electrode body through each first space and each second space. Therefore, compared to the case where only the first space among the first and second spaces is formed, the impregnation of the electrolyte is superior.

[0014] According to another aspect of the present disclosure, a capacitor module comprises the stacked electrode body described above and a receiver that accommodates the stacked electrode body.

[0015] With this configuration, a capacitor module can be constructed using a laminated electrode body with excellent electrolyte impregnation properties. Consequently, it is possible to suppress the decrease in volumetric energy density.

[0016] The above and other objects, features, aspects, and advantages of the present invention will become apparent from the following detailed description of the invention, which is understood in conjunction with the accompanying drawings. Brief explanation of the drawing

[0017] Figure 1 is a perspective view of a capacitor module. Figure 2 is a figure showing a stacked electrode body included in a capacitor module. Figure 3 is a diagram showing the negative pole in a predetermined direction. Figure 4 is a diagram showing the negative pole viewed in the opposite direction to Figure 3. Figure 5 is a diagram showing the negative pole in the direction of arrow V in Figures 3 and 4. Figure 6 is a cross-sectional view taken along the line arrow VI-VI in Figure 2. Figure 7 is a figure showing a stacked electrode body. Figure 8 is a diagram showing the negative pole in a predetermined direction. Figure 9 is a diagram showing the negative pole viewed in the opposite direction to Figure 8. Figure 10 is a diagram showing the negative pole in the direction of arrow X in Figures 8 and 9. FIG. 11 is a cross-sectional view taken along the line arrow XI-XI in FIG. 7. Specific details for implementing the invention

[0018] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In addition, in the embodiments shown below, the same reference numerals are assigned to identical or common parts in the drawings, and their descriptions are not repeated.

[0019] FIG. 1 is a perspective view of a capacitor module related to the present embodiment. FIG. 2 is a diagram showing a stacked electrode body included in the capacitor module of FIG. 1. As shown in FIG. 1 and FIG. 2, the capacitor module (1) has a blade shape. The capacitor module (1) comprises a stacked electrode body (100) and a receiver (2) that accommodates the stacked electrode body (100). Furthermore, for convenience of explanation, the capacitor module (1) will be described below by taking an example in which the capacitor module (1) assumes a position in which the D3 direction shown in FIG. 1, FIG. 2, etc. is a vertical direction (more specifically, the D31 direction described below is a vertical upward direction), except when the electrolyte is injected as described later.

[0020] In this example, the battery module (1) is a lithium iron phosphate (LFP) type battery. However, it is not limited thereto, and the battery module (1) may be a ternary (NMC) type battery. The battery module (1) is mounted, for example, in an electric vehicle that runs on driving power obtained from electric energy. Specifically, a battery pack comprising a plurality of battery modules (1) arranged side by side in a predetermined direction is mounted in the electric vehicle. The battery pack is mounted on the vehicle body of the electric vehicle. The battery pack constitutes a part of the vehicle body. The battery pack is made to function as a structural element of the vehicle body.

[0021] As shown in FIG. 1, the receptor (2) is approximately rectangular in shape. In this example, the receptor (2) is a metal case. The receptor (2) has first to sixth surfaces (21 to 26). The first surface (21), the second surface (22), the third surface (23), and the fourth surface (24) are continuous in this order. The first surface (21), the second surface (22), the third surface (23), and the fourth surface (24) form the outer surface of the receptor (2).

[0022] The fifth side (25) and the sixth side (26) are cross-sections of the receiver (2). The first side (21) is the top surface, the second side (22) is the bottom surface, and the third side (23) and the fourth side (24) are the sides. On the fifth side (25), an external connection terminal (27) for the negative side is provided. On the sixth side (26), an external connection terminal (not shown) for the positive side is provided.

[0023] As shown in FIG. 2, the stacked electrode body (100) has a plurality of electrodes (negative electrode (110), positive electrode (120)) and a plurality of separators (130). In the stacked electrode body (100), the plurality of electrodes are stacked in the D1 direction (stacking direction). Specifically, in the stacked electrode body (100), the negative electrode (110) and the positive electrode (120) are alternately stacked in the D1 direction with the separator (130) interposed. To prevent short circuits between the negative electrode (110) and the positive electrode (120), the length of the separator (130) in the D3 direction is longer than the length of each of the negative electrode (110) and the positive electrode (120) in the D3 direction. Additionally, the D1 direction is the width direction of the capacitor module (1).

[0024] The laminated electrode body (100) further comprises a tab (150) connected to an external connection terminal (27) on the negative side and a tab (160) connected to an external connection terminal on the positive side. The tab (150) is formed by packing copper foil. The tab (160) is formed by packing aluminum foil. In addition, the direction of D11 in the D1 direction is the direction from the third surface (23) of the receptacle (2) shown in FIG. 1 toward the fourth surface (24). The direction of D12 in the D1 direction is the direction from the fourth surface (24) toward the third surface (23).

[0025] As shown in FIG. 1, the capacitor module (1) and the receptacle (2) are extended in the D2 direction. As shown in FIG. 2, the stacked electrode body (100) is extended in the D2 direction. The D2 direction is perpendicular to the D1 direction. The D2 direction is the length direction of the capacitor module (1), the receptacle (2), and the stacked electrode body (100). The D3 direction is perpendicular to the D1 direction and the D2 direction. The D3 direction is the height direction of the capacitor module (1). In addition, the direction of D21 in the D2 direction is the direction from the 6th surface (26) of the receptacle (2) shown in FIG. 1 toward the 5th surface (25). The direction of D22 in the D2 direction is the direction from the 5th surface (25) toward the 6th surface (26).

[0026] The D1 direction is the width direction for each of the first surface (21), the second surface (22), the fifth surface (25), and the sixth surface (26). The D2 direction is the length direction for the first to fourth surfaces (21 to 24). The D3 direction is the width direction for the third and fourth surfaces (23, 24), and also the length direction for the fifth and sixth surfaces (25, 26).

[0027] On the fifth surface (25), an injection hole (2h) for injecting an electrolyte into the interior of the receptacle (2) is formed. The injection hole (2h) is formed on the first surface (21) side rather than the second surface (22) of the receptacle (2). The injection hole (2h) is formed on the first surface (21) side rather than the external connection terminal (27). Also, in the state of FIG. 1, since the electrolyte has already been injected into the interior of the receptacle (2), the injection hole (2h) is in a blocked state. The injection hole (2h) may be temporarily blocked by inserting a removable plug into the injection hole (2h). Alternatively, the injection hole (2h) may be blocked with resin or metal so that the electrolyte cannot be re-injected unless the through hole is opened.

[0028] When injecting the electrolyte from the injection hole (2h) during the manufacture of the capacitor module (1), the position of the capacitor module (1) is maintained such that the D2 direction is approximately vertical and the fifth side (25) is positioned higher than the sixth side (26). Due to the gravity of the electrolyte, the electrolyte flows from the fifth side (25) to the sixth side (26). Additionally, since the electrolyte has a certain degree of viscosity, it falls into the receptacle (2) at a relatively slow speed. Accordingly, the electrolyte can be impregnated into the laminated electrode body (100). Furthermore, the method of injecting the electrolyte is not limited to this. The electrolyte may be injected into the capacitor module (1) while the interior of the capacitor module (1) is under reduced pressure (reduced pressure injection).

[0029] In this example, the injection hole (2h) is formed on the first surface (21) side relative to the external connection terminal (27), but is not limited thereto. The injection hole (2h) may be formed on the second surface (22) side relative to the external connection terminal (27). The injection hole (2h) may be formed on the third surface (23) side relative to the external connection terminal (27). The injection hole (2h) may be formed on the fourth surface (24) side relative to the external connection terminal (27).

[0030] In addition, in this example, a configuration in which the injection hole (2h) is formed on the fifth surface (25) has been described as an example, but it is not limited thereto. For example, the injection hole (2h) may be formed on the sixth surface (26). The injection hole (2h) may be formed on the first surface (21) or the second surface (22). When the injection hole (2h) is formed on the first surface (21) or the second surface (22), from the perspective of injection properties, it is preferable that the injection hole (2h) be formed on the end side (the fifth surface (25) side or the sixth surface (26) side) rather than the center side in the longitudinal direction of the receptacle (2). The injection hole (2h) may be formed on the third surface (23) or the fourth surface (24). The location of formation of the injection hole (2h) is not particularly limited.

[0031] FIG. 3 is a view of the negative electrode (110) in the direction of D11 of FIG. 2. In FIG. 3, for convenience of explanation, reference symbols for each part and direction of the positive electrode (120) are indicated in parentheses so as to also explain the positive electrode (120).

[0032] As shown in FIG. 3, the negative electrode (110) includes a metal foil (111). The metal foil (111) is a base material of the negative electrode (110). The metal foil (111) is typically a copper foil. The metal foil (111) extends in the D2 direction along the length of the negative electrode (110) in the D2 direction. Likewise, the metal foil (111) extends in the D3 direction along the length (width) of the negative electrode (110) in the D3 direction. The D1 direction is the thickness direction of the metal foil (111).

[0033] The metal foil (111) has a first surface (1111). The first surface (1111) extends in the D2 direction along the length of the negative electrode (110) in the D2 direction. Likewise, the first surface (1111) extends in the D3 direction along the length (width) of the negative electrode (110) in the D3 direction. The normal direction of the first surface (1111) is the D1 direction.

[0034] The first main surface (1111) extends in the direction of D2 and also has an active material coated area (P111) where the active material (112) is coated. The first main surface (1111) is continuous with the active material coated area (P111) in the direction of D2 and additionally has an active material uncoated area (Q111) where the active material (112) is not coated. The active material uncoated area (Q111) is located in the direction of D21 with respect to the active material coated area (P111).

[0035] The active material uncoated area (Q111) has a resin (113) disposed thereon and also has a partial area (Q111a) located on the side of the active material coated area (P111) of the first main surface (1111). In this example, the partial area (Q111a) is continuous with the active material coated area (P111). On the first main surface (1111), only the area excluding the partial area (Q111a) of the active material uncoated area (Q111) is exposed. Specifically, in FIG. 3, the metal foil (111) is exposed at the right end of the metal foil (111). Also, the direction of D32 in the D3 direction is vertically downward.

[0036] In addition, for example, the resin (113) can be formed by coating the partial region (Q111a) with resin. It is not limited to this, but the resin (113) may also be formed by heat-welding a resin film to the partial region (Q111a). The resin film may also be welded by laser irradiation, etc. In this way, the resin (113) is placed in the partial region (Q111a). In addition, the same applies to the resins (123, 115, 115A, 125, 125A) described later.

[0037] Next, the positive electrode (120) is described. The positive electrode (120) includes a metal foil (121). The metal foil (121) is a member that serves as the base of the positive electrode (120). The metal foil (121) is typically an aluminum foil. The metal foil (121) extends in the D2 direction along the length of the positive electrode (120) in the D2 direction. Likewise, the metal foil (121) extends in the D3 direction along the length (width) of the positive electrode (120) in the D3 direction. The D1 direction is the thickness direction of the metal foil (121).

[0038] The metal foil (121) has a first surface (1211). The first surface (1211) extends in the D2 direction along the length of the D2 direction of the positive electrode (120). Likewise, the first surface (1211) extends in the D3 direction along the length (width) of the D3 direction of the positive electrode (120). The normal direction of the first surface (1211) is the D1 direction. In this example, the first surface (1111) of the negative electrode (110), the second surface (1112) of the negative electrode (110), the first surface (1211) of the positive electrode (120), and the second surface (1212) of the positive electrode (120) are positioned repeatedly in this order in the direction of D11.

[0039] The first main surface (1211) extends in the direction of D2 and also has an active material coated area (P121) coated with active material (122). The first main surface (1211) is continuous with the active material coated area (P121) in the direction of D2 and additionally has an active material uncoated area (Q121) where the active material (122) is not coated. The active material uncoated area (Q121) is located in the direction of D22 with respect to the active material coated area (P121).

[0040] The active material uncoated area (Q121) has a resin (123) disposed thereon and also has a partial area (Q121a) located on the side of the active material coated area (P121) of the first main surface (1211). In this example, the partial area (Q121a) is continuous with the active material coated area (P121). On the first main surface (1211), only the area excluding the partial area (Q121a) of the active material uncoated area (Q121) is exposed. In FIG. 3, a metal foil (121) is exposed at the right end. Also, in this example, the material of the resin (123) is the same as the material of the resin (113).

[0041] FIG. 4 is a view of the negative electrode (110) in the direction of D12 of FIG. 2. Also, in FIG. 4, in order to explain the positive electrode (120) together, reference symbols for each part and direction of the positive electrode (120) are indicated in parentheses, just as in FIG. 3.

[0042] As shown in FIG. 4, the metal foil (111) additionally has a second surface (1112). The second surface (1112) is the back side of the first surface (1111) shown in FIG. 3. The second surface (1112) extends in the D2 direction along the length in the D2 direction of the negative electrode (110), just like the first surface (1111). The second surface (1112) extends in the D3 direction along the length (width) in the D3 direction of the negative electrode (110). The normal direction of the second surface (1112) is the same as the normal direction (D1 direction) of the first surface (1111).

[0043] The second main surface (1112) extends in the direction of D2 and also has an active material coated area (P112) coated with active material (114). The second main surface (1112) is continuous with the active material coated area (P112) in the direction of D2 and additionally has an active material uncoated area (Q112) where the active material (114) is not coated. The active material uncoated area (Q112) is located in the direction of D21 with respect to the active material coated area (P112).

[0044] The active material uncoated area (Q112) has a resin (115) disposed thereon and also has a partial area (Q112a) located on the side of the active material coated area (P112) of the second main surface (1112). In this example, the partial area (Q112a) is continuous with the active material coated area (P112). In addition, the material of the resin (115) is the same as the material of the resin (113).

[0045] The active material uncoated region (Q112) additionally has a first end (E112a) and a second end (E112b). The second end (E112b) is located below the first end (E112a). The partial region (Q112a) does not reach the first end (E112a). Likewise, the partial region (Q112a) does not reach the second end (E112b).

[0046] Accordingly, the length in the D3 direction of the partial region (Q112a) is shorter than the length in the D3 direction of the metal foil (111). The length in the D3 direction of the partial region (Q112a) is shorter than the length (width) in the D3 direction of the second main surface (1112). The length in the D3 direction of the partial region (Q112a) is shorter than the length in the D3 direction of the active material uncoated region (Q112). The length in the D3 direction of the partial region (Q112a) is shorter than the length in the D3 direction of the partial region (Q111a) shown in FIG. 3.

[0047] In the second main surface (1112), only the area excluding the partial area (Q112a) of the active material uncoated area (Q112) is exposed. Specifically, in the second main surface (1112), only the U-shaped area excluding the partial area (Q112a) of the active material uncoated area (Q112) is exposed. Specifically, in FIG. 4, the metal foil (111) is exposed at the left end of the metal foil (111) and above and below the partial area (Q112a).

[0048] Next, the positive electrode (120) will be described. The metal foil (121) of the positive electrode (120) additionally has a second surface (1212). The second surface (1212) is the back side of the first surface (1211) shown in FIG. 3. The second surface (1212), like the first surface (1211), extends in the D2 direction along the length in the D2 direction of the positive electrode (120). The second surface (1212) extends in the D3 direction along the length (width) in the D3 direction of the positive electrode (120). The normal direction of the second surface (1212) is the same as the normal direction (D1 direction) of the first surface (1211).

[0049] The second main surface (1212) extends in the direction of D2 and also has an active material coated area (P122) coated with active material (124). The second main surface (1212) is continuous with the active material coated area (P122) in the direction of D2 and additionally has an active material uncoated area (Q122) where the active material (124) is not coated. The active material uncoated area (Q122) is located in the direction of D22 with respect to the active material coated area (P122).

[0050] The active material uncoated area (Q122) has a resin (125) disposed thereon and also has a partial area (Q122a) located on the side of the active material coated area (P122) of the second main surface (1212). In this example, the partial area (Q122a) is continuous with the active material coated area (P122). In addition, the material of the resin (125) is the same as the material of the resin (115).

[0051] The active material uncoated region (Q122) additionally has a first end (E122a) and a second end (E122b). The second end (E122b) is located below the first end (E122a). The partial region (Q122a) does not reach the first end (E122a). Likewise, the partial region (Q122a) does not reach the second end (E122b).

[0052] Accordingly, the length in the D3 direction of the partial region (Q122a) is shorter than the length in the D3 direction of the metal foil (121). The length in the D3 direction of the partial region (Q122a) is shorter than the length (width) in the D3 direction of the second main surface (1212). The length in the D3 direction of the partial region (Q122a) is shorter than the length in the D3 direction of the active material uncoated region (Q122). The length in the D3 direction of the partial region (Q122a) is shorter than the length in the D3 direction of the partial region (Q121a) shown in FIG. 3.

[0053] In the second main surface (1212), only the area excluding the partial area (Q122a) of the active material uncoated area (Q122) is exposed. Specifically, in the second main surface (1212), only the U-shaped area excluding the partial area (Q122a) of the active material uncoated area (Q122) is exposed. Specifically, in FIG. 4, the metal foil (121) is exposed at the left end of the metal foil (121) and above and below the partial area (Q122a).

[0054] FIG. 5 is a view of the negative electrode (110) in the direction of arrow V in FIG. 3 and FIG. 4. Also in FIG. 5, in order to explain the positive electrode (120) together, reference symbols for each part and direction of the positive electrode (120) are indicated in parentheses, just as in FIG. 3 and others.

[0055] As shown in FIG. 5, in the negative electrode (110), a resin (113) is disposed on the first surface (1111) of the metal foil (111), and an active material (112) (not shown) is coated. A resin (115) is disposed on the second surface (1112) of the metal foil (111), and an active material (114) is coated. As described above, the second surface (1112) of the negative electrode (110) (specifically, an area without active material coating (Q112)) has a first end (E112a) and a second end (E112b). In the first end (E112a) and the second end (E112b), the resin (115) is not disposed, and the active material (114) is not coated. At least, the first end (E112a) and the second end (E112b) are exposed.

[0056] In the positive electrode (120), a resin (123) is disposed on the first surface (1211) of the metal foil (121), and an active material (122) (not shown) is coated. A resin (125) is disposed on the second surface (1212) of the metal foil (121), and an active material (124) is coated. As described above, the second surface (1212) of the positive electrode (120) (specifically, an area without active material coating (Q122)) has a first end (E122a) and a second end (E122b). In the first end (E122a) and the second end (E122b), the resin (125) is not disposed, and the active material (124) is not coated. At least, the first end (E122a) and the second end (E122b) are exposed.

[0057] FIG. 6 is a cross-sectional view taken along the line arrow VI-VI in FIG. 2. As shown in FIG. 6, in the stacked electrode body (100), the negative electrode (110) and the positive electrode (120) are stacked in the D1 direction with a separator (130) interposed.

[0058] The resin (113) placed in the partial region (Q111a) (Fig. 3) and the resin (115) placed in the partial region (Q112a) (Fig. 4) are in contact with the separator (130). Specifically, focusing on one negative electrode (110), the resin (115) is in contact with the separator (130) next to the separator (130) that the resin (113) is in contact with. Specifically, the resin (115) is in contact with the separator (130) on the right side (direction of D11) of the separator (130) that the resin (113) is in contact with.

[0059] In the second main body (1112) of the negative electrode (110), a space (S1) is formed on the side of the partial region (Q112a) between the first and second ends (E112a, E112b) in the D3 direction of the active material uncoated region (Q112) (Fig. 4) and the separator (130). Specifically, a space (S1) is formed between the first end (E112a) and the separator (130) to which the resin (115) is in contact. A space (S1) is formed between the second end (E112b) and the separator (130) to which the resin (115) is in contact. Two spaces (S1) are formed between the metal foil (111) and the separator (130) to which the resin (115) is in contact. The two spaces (S1) are spaced apart in the direction of D3. Space (S1) is a gap.

[0060] The length in the D3 direction of the partial region (Q112a) (Fig. 4) is shorter than the length in the D3 direction of the metal foil (111). Specifically, the length in the D3 direction of the partial region (Q112a) is shorter than the length in the D3 direction of the active material uncoated region (Q112). Therefore, a space (S1) is formed between the metal foil (111) and the separator (130) in contact with the resin (115). In this example, the partial region (Q112a) is formed in the center of the active material uncoated region (Q112) in the D3 direction. Therefore, two spaces (S1) are formed between the metal foil (111) and the separator (130) in contact with the resin (115).

[0061] In addition, in this example, the length in the D3 direction of the partial region (Q111a) (Fig. 3) is the same as the length in the D3 direction of the metal foil (111). Specifically, the length in the D3 direction of the partial region (Q111a) is the same as the length in the D3 direction of the active material uncoated region (Q111). Therefore, a space (S1) is not formed between the metal foil (111) and the separator (130) in contact with the resin (113).

[0062] In the above description, the space (S1) formed between the negative electrode (110) and the separator (130) was explained based on FIG. 6. In the stacked electrode body (100), as shown in FIG. 3, FIG. 4, and FIG. 5, the positive electrode (120) has the same configuration as the negative electrode (110). Therefore, a space (hereinafter referred to as "space (S2)") similar to space (S1) is formed between the positive electrode (120) and the separator (130). Also, the space (S2) is not shown because it is hidden in the state of FIG. 6.

[0063] Specifically, a space (S2) is formed on the side of the partial region (Q122a) between the first and second ends (E122a, E122b) in the D3 direction of the active material uncoated area (Q122) (Fig. 4) of the second main surface (1212) of the positive electrode (120) and the separator (130). More specifically, a space (S2) is formed between the first end (E122a) and the separator (130) to which the resin (125) is in contact. A space (S2) is formed between the second end (E122b) and the separator (130) to which the resin (125) is in contact. Two spaces (S2) are formed between the metal foil (121) and the separator (130) to which the resin (125) is in contact.

[0064] In addition, the configuration of the positive electrode (120) side is not limited to the above. A resin (123) shown in FIG. 3 may be disposed on the second main surface (1212) side shown in FIG. 4, and a resin (125) shown in FIG. 4 may also be disposed on the first main surface (1211) side shown in FIG. 3.

[0065] Additionally, the first surface (1111, 1211) (Fig. 3) corresponds to the "first surface" of the present disclosure. The second surface (1112, 1212) (Fig. 4) corresponds to the "second surface" of the present disclosure. The active material coated area (P111, P112, P121, P122) (Fig. 3, Fig. 4) corresponds to the "active material coated area" of the present disclosure. The active material uncoated area (Q111, Q112, Q121, Q122) (Fig. 3, Fig. 4) corresponds to the "active material uncoated area" of the present disclosure.

[0066] Q16666666666666666666666666666666666666666667

[0067] Partial regions (Q111a, Q121a) (Fig. 3) correspond to the “second resin placement region” of the present disclosure. Partial regions (Q112a, Q122a) (Fig. 4) correspond to the “first resin placement region” of the present disclosure. The first end (E112a, 122a) (Fig. 4) and the second end (E112b, 122b) (Fig. 4) correspond to the “third direction end of the active material uncoated region of the second surface” of the present disclosure. Spaces (S1, S2) correspond to the “first space” of the present disclosure.

[0068] However, in the above, a space (S1) is formed by the resin (115) (Fig. 4, Fig. 6), and a space (S2) is formed by the resin (125) (Fig. 4). Specifically, as shown in Fig. 6, a space (S1) is formed between the metal foil (111) and the separator (130) on the right side (D11 side) of the metal foil (111). Likewise, a space (S2) (not shown) is formed between the metal foil (121) and the separator (130) on the D12 side (see Fig. 5) of the metal foil (121).

[0069] Meanwhile, since the length in the D3 direction of the resin (113) (Fig. 4, Fig. 6) is the same as the length in the D3 direction of the metal foil (111), as shown in Fig. 6, a space such as space (S1) is not formed between the metal foil (111) and the separator (130) on the left side (D12 side) of the metal foil (111). Likewise, since the length in the D3 direction of the resin (123) (Fig. 4) is the same as the length in the D3 direction of the metal foil (121), a space such as space (S2) is not formed between the metal foil (121) and the separator (130) on the D11 side of the metal foil (121).

[0070] However, it is not limited to this. By making the shape and arrangement of the resin (113) (Fig. 3) the same as that of the resin (115) (Fig. 4), a space similar to space (S1) (hereinafter referred to as "space (S1')") may be formed between the metal foil (111) and the separator (130) on the D12 side (left side in Fig. 6) of the metal foil (111). Likewise, by making the shape and arrangement of the resin (123) (Fig. 3) the same as that of the resin (125) (Fig. 4), a space similar to space (S2) (hereinafter referred to as "space (S2')") may be formed between the metal foil (121) and the separator (130) on the D11 side of the metal foil (121).

[0071] More specifically, a space (S1') may be formed between the two ends in the D3 direction of the active material uncoated area (Q111) of the first main surface (1111) of the negative electrode (110) and the separator (130). Likewise, a space (S2') may be formed between the two ends in the D3 direction of the active material uncoated area (Q121) of the first main surface (1211) of the positive electrode (120) and the separator (130). In this way, a space may be formed between the two ends in the D3 direction of the active material uncoated area (Q111, Q121) of the first main surface (1111, 1211) and the separator (130). Furthermore, the said space (S1', S2') corresponds to the "second space".

[0072] Summary

[0073] (1) As shown in FIGS. 1 and 2, the capacitor module (1) has a stacked electrode body (100) and a receptacle (2) that receives the stacked electrode body (100), in which an electrolyte injection hole (2h) is formed to impregnate the stacked electrode body (100). As shown in FIG. 2, the stacked electrode body (100) has each electrode (each negative electrode (110), each positive electrode (120)) and each separator (130) alternately stacked in the D1 direction and also extends in the D2 direction perpendicular to the D1 direction.

[0074] As shown in FIGS. 3, 4, and 5, each negative electrode (110) comprises a metal foil (111) having a first surface (1111) and a second surface (1112) on the reverse side of the first surface (1111). Each positive electrode (120) comprises a metal foil (121) having a first surface (1211) and a second surface (1212) on the reverse side of the first surface (1211).

[0075] As shown in FIG. 3, the first main surface (1111) of the negative electrode (110) has an active material coated area (P111) that extends in the D2 direction and is coated with active material (112), and an active material uncoated area (Q111) that is continuous with the active material coated area (P111) in the D2 direction and is not coated with active material (112). Likewise, the first main surface (1211) of the positive electrode (120) has an active material coated area (P121) that extends in the D2 direction and is coated with active material (122), and an active material uncoated area (Q121) that is continuous with the active material coated area (P121) in the D2 direction and is not coated with active material (122).

[0076] As shown in FIG. 4, the second main surface (1112) of the negative electrode (110) has an active material coated area (P112) that extends in the D2 direction and is coated with active material (114), and an active material uncoated area (Q112) that is continuous with the active material coated area (P112) in the D2 direction and is not coated with active material (114). Likewise, the second main surface (1212) of the positive electrode (120) has an active material coated area (P122) that extends in the D2 direction and is coated with active material (124), and an active material uncoated area (Q122) that is continuous with the active material coated area (P122) in the D2 direction and is not coated with active material (124).

[0077] As shown in FIGS. 3 and 4, the active material uncoated area (Q112) of the second main surface (1112) of the negative electrode (110) is located on the other side of the active material uncoated area (Q111) of the first main surface (1111) of the metal foil (111). Likewise, the active material uncoated area (Q122) of the second main surface (1212) of the positive electrode (120) is located on the other side of the active material uncoated area (Q121) of the first main surface (1211) of the metal foil (121).

[0078] As shown in FIG. 3, the active material uncoated area (Q111) of the first main surface (1111) of the negative electrode (110) has a resin (113) disposed therein and also has a partial area (Q111a) located on the side of the active material coated area (P111) of the first main surface (1111). Likewise, the active material uncoated area (Q121) of the first main surface (1211) of the positive electrode (120) has a resin (123) disposed therein and also has a partial area (Q121a) located on the side of the active material coated area (P121) of the first main surface (1211).

[0079] As shown in FIG. 4, the active material uncoated area (Q112) of the second main surface (1112) of the negative electrode (110) has a resin (115) disposed therein and also has a partial area (Q112a) located on the side of the active material coated area (P112) of the second main surface (1112). Likewise, the active material uncoated area (Q122) of the second main surface (1212) of the positive electrode (120) has a resin (125) disposed therein and also has a partial area (Q122a) located on the side of the active material coated area (P122) of the second main surface (1212).

[0080] As shown in FIG. 6, between the first and second ends (E112a, E112b) in the D3 direction, which are perpendicular to the D1 and D2 directions of the active material uncoated area (Q112) of the second main surface (1112) of the negative electrode (110), and the separator (130), a space (S1) (first space) is formed on the side of the partial area (Q112a). Similarly, between the first and second ends (E122a, E122b) in the D3 direction of the active material uncoated area (Q122) of the second main surface (1212) of the positive electrode (120) and the separator (130), a space (S2) (first space, not shown) is formed on the side of the partial area (Q122a).

[0081] According to this configuration, it becomes possible to impregnate the electrolyte injected through the injection hole (2h) of the receiver (2) into the interior of the stacked electrode body (100) through each space (S1) and each space (S2). That is, each space (S1) and each space (S2) can be used as a supply path for the electrolyte. Therefore, there is no need to provide a conduit for guiding the electrolyte within the receiver (2). Consequently, the stacked electrode body (100) has excellent electrolyte impregnation properties, and it is also possible to suppress the decrease in volumetric energy density in the capacitor module (1).

[0082] (2) As shown in FIG. 6, the resin (115) placed in the partial region (Q112a) (Fig. 4) is in contact with the separator (130) next to the separator (130) that the resin (113) placed in the partial region (Q111a) (Fig. 3) is in contact with. The resin (125) placed in the partial region (Q122a) (Fig. 4) is in contact with the separator (130) next to the separator (130) that the resin (123) placed in the partial region (Q121a) (Fig. 3) is in contact with. As shown in FIG. 4 and FIG. 6, the length in the D3 direction of the partial region (Q112a) is shorter than the length in the D3 direction of the metal foil (111). The length in the D3 direction of the partial region (Q122a) is shorter than the length in the D3 direction of the metal foil (121). According to this configuration, it is possible to form spaces (S1) and (S2) in the stacked electrode body (100).

[0083] (3) As described above, a space (S1') (second space, not shown) may be formed on the side of the partial area (Q111a) between the two ends in the D3 direction of the active material uncoated area (Q111) of the first main body (1111) (see E111a, E111b in FIG. 8) and the separator (130). Likewise, a space (S2') (second space, not shown) may be formed on the side of the partial area (Q121a) between the two ends in the D3 direction of the active material uncoated area (Q121) of the first main body (1211) (see E121a, E121b in FIG. 8) and the separator (130). With such a configuration, in addition to the spaces (S1, S2), the spaces (S1', S2') can be additionally used as supply paths for the electrolyte. Therefore, according to the laminated electrode body (100) with such a configuration, the impregnation of the electrolyte is superior.

[0084] (4) As shown in FIG. 4, a flow path for the electrolyte can be formed in the D2 direction (particularly on the side of the active material coating area (P112)) at both ends (E112a, E112b) in the D3 direction of the metal foil (111) by means of a resin (115). Likewise, a flow path for the electrolyte can be formed in the D2 direction (particularly on the side of the active material coating area (P122)) at both ends (E122a, E122b) in the D3 direction of the metal foil (121) by means of a resin (125).

[0085] Additionally, since the resin (115) is provided on the side of the active material coating area (P112), a flow path for the electrolyte in the D3 direction can be formed at the end of the metal foil (111) on the D21 side. Likewise, since the resin (125) is provided on the side of the active material coating area (P122), a flow path for the electrolyte in the D3 direction can be formed at the end of the metal foil (121) on the D22 side.

[0086] <Variation Example>

[0087] A modified example of a laminated electrode body (100) is described, which is a laminated electrode body (100A).

[0088] FIG. 7 is a figure showing a stacked electrode body (100A). As shown in FIG. 7, the stacked electrode body (100A) has a plurality of negative electrodes (110A), a plurality of positive electrodes (120A), and a plurality of separators (130). In the stacked electrode body (100A), a plurality of electrodes (negative electrodes (110A), positive electrodes (120A)) are alternately stacked in the D1 direction with the separator (130) interposed.

[0089] The laminated electrode body (100A) additionally has a plurality of spacers (190) (Figs. 8–11). Some of the spacers (190) are inserted between the negative electrode (110A) and the separator (130). The remaining spacers (190) are inserted between the positive electrode (120A) and the separator (130). One side of each spacer (190) is in contact with the separator (130).

[0090] Thus, the stacked electrode body (100A) is different from the stacked electrode body (100) which is not equipped with spacers (190) in that it is equipped with a plurality of spacers (190). The stacked electrode body (100A) is different from the stacked electrode body (100) in that it has a negative electrode (110A) instead of a negative electrode (110). The stacked electrode body (100A) is different from the stacked electrode body (100) in that it has a positive electrode (120A) instead of a positive electrode (120).

[0091] FIG. 8 is a view of the negative electrode (110A) in the direction of D11 of FIG. 7. In FIG. 8, for convenience of explanation, reference symbols for each part and direction of the positive electrode (120A) are indicated in parentheses so as to also explain the positive electrode (120A).

[0092] As shown in FIG. 8, the negative electrode (110A) includes a metal foil (111). The metal foil (111) has a first surface (1111) as described above. The negative electrode (110A) has the same configuration as the negative electrode (110) on the side of the first surface (1111) (Fig. 3). Likewise, the positive electrode (120A) includes a metal foil (121). The metal foil (121) has a first surface (1211) as described above. The positive electrode (120A) has the same configuration as the positive electrode (120) on the side of the first surface (1211) (Fig. 3).

[0093] The length in the D3 direction of the partial region (Q111a) of the negative electrode (110A) is equivalent to the length in the D3 direction of the metal foil (111). That is, as described above, the length in the D3 direction of the partial region (Q111a) is equivalent to the length in the D3 direction of the active material uncoated region (Q111). Likewise, the length in the D3 direction of the partial region (Q121a) of the positive electrode (120A) is equivalent to the length in the D3 direction of the metal foil (121). That is, as described above, the length in the D3 direction of the partial region (Q121a) is equivalent to the length in the D3 direction of the active material uncoated region (Q121).

[0094] The active material uncoated region (Q111) of the negative electrode (110A) additionally has a first end (E111a) and a second end (E111b). The second end (E111b) is located below the first end (E111a). Likewise, the active material uncoated region (Q121) of the positive electrode (120A) additionally has a first end (E121a) and a second end (E121b). The second end (E121b) is located below the first end (E121a).

[0095] The resin (113) of the negative electrode (110A) additionally has a first end (E113a) and a second end (E113b). The second end (E113b) is located below the first end (E113a). Likewise, the resin (123) of the positive electrode (120A) additionally has a first end (E123a) and a second end (E123b). The second end (E123b) is located below the first end (E123a).

[0096] Some of the spacers (190) among the plurality of spacers (190) are mounted on the resin (113). One side of the spacer (190) is in contact with the resin (113), and the other side is in contact with the separator (130). In this example, the length of the spacer (190) in the D3 direction is shorter than the length of the resin (113) in the D3 direction. The length of the spacer (190) in the D2 direction is shorter than the length of the resin (113) in the D2 direction. It is not limited thereto, and the length of the spacer (190) in the D2 direction may be the same as the length of the resin (113) in the D2 direction.

[0097] FIG. 9 is a view of the negative electrode (110A) in the direction of D12 of FIG. 7. In FIG. 9, for convenience of explanation, reference symbols for each part and direction of the positive electrode (120A) are indicated in parentheses so as to also explain the positive electrode (120A).

[0098] As shown in FIG. 9, the metal foil (111) has a second surface (1112) as described above. The second surface (1112) has an active material coated area (P112) and an active material uncoated area (Q112) as described above.

[0099] The active material uncoated area (Q112) has a resin (115A) disposed thereon and also has a partial area (Q112b) located on the side of the active material coated area (P112) of the second main surface (1112). In this example, the partial area (Q112b) is continuous with the active material coated area (P112). On the second main surface (1112), only the area excluding the partial area (Q112b) of the active material uncoated area (Q112) is exposed. Specifically, in FIG. 9, the metal foil (111) is exposed at the left end of the metal foil (111).

[0100] As described above, the active material uncoated region (Q112) additionally has a first end (E112a) and a second end (E112b). The resin (115A) additionally has a first end (E115a) and a second end (E115b). The second end (E115b) is located below the first end (E115a). Also, in this example, the material of the resin (115A) and the material of the resin (115) are the same.

[0101] Some of the spacers (190) among the plurality of spacers (190) are mounted on the resin (115A). One side of the spacer (190) is in contact with the resin (115A), and the other side is in contact with the separator (130). In this example, the length in the D3 direction of the spacer (190) mounted on the resin (115A) is shorter than the length in the D3 direction of the resin (115A). The length in the D2 direction of the spacer (190) is shorter than the length in the D2 direction of the resin (115A). It is not limited thereto, and the length in the D2 direction of the spacer (190) may be the same as the length in the D2 direction of the resin (115A).

[0102] Next, the positive electrode (120A) is described. The metal foil (121) has a second surface (1212) as described above. The second surface (1212) has an active material coated area (P122) and an active material uncoated area (Q122) as described above.

[0103] The active material uncoated area (Q122) has a resin (125A) disposed thereon and also has a partial area (Q122b) located on the side of the active material coated area (P122) of the second main surface (1212). In this example, the partial area (Q122b) is continuous with the active material coated area (P122). On the second main surface (1212), only the area excluding the partial area (Q122b) of the active material uncoated area (Q122) is exposed. In FIG. 9, a metal foil (121) is exposed at the left end.

[0104] As described above, the active material uncoated region (Q122) additionally has a first end (E122a) and a second end (E122b). The resin (125A) additionally has a first end (E125a) and a second end (E125b). The second end (E125b) is located below the first end (E125a). Also, in this example, the material of the resin (125A) and the material of the resin (115) are the same.

[0105] Some of the spacers (190) among the plurality of spacers (190) are mounted on the resin (123). One side of the spacer (190) is in contact with the resin (123), and the other side is in contact with the separator (130). Some of the spacers (190) among the plurality of spacers (190) are mounted on the resin (125A). One side of the spacer (190) is in contact with the resin (125A), and the other side is in contact with the separator (130).

[0106] The length in the D3 direction of the partial region (Q112b) of the negative electrode (110A) is equivalent to the length in the D3 direction of the metal foil (111). That is, the length in the D3 direction of the partial region (Q112b) is equivalent to the length in the D3 direction of the active material uncoated region (Q112). Likewise, the length in the D3 direction of the partial region (Q122b) of the positive electrode (120A) is equivalent to the length in the D3 direction of the metal foil (121). That is, the length in the D3 direction of the partial region (Q122b) is equivalent to the length in the D3 direction of the active material uncoated region (Q122).

[0107] FIG. 10 is a view of the negative electrode (110A) in the direction of arrow X in FIG. 8 and FIG. 9. Also in FIG. 10, in order to explain the positive electrode (120A) together, reference symbols for each part and direction of the positive electrode (120A) are indicated in parentheses as in FIG. 8, etc.

[0108] As shown in FIG. 10, in the negative electrode (110A), a resin (113) is disposed on the first surface (1111) of the metal foil (111), and an active material (112) (not shown) is coated. On the second surface (1112) of the metal foil (111), a resin (115A) and an active material (114) (not shown) are coated.

[0109] In the positive electrode (120A), a resin (123) is disposed on the first surface (1211) of the metal foil (121), and an active material (122) (not shown) is coated. A resin (125A) is disposed on the second surface (1212) of the metal foil (121), and an active material (124) (not shown) is coated.

[0110] FIG. 11 is a cross-sectional view taken along the line arrow XI-XI in FIG. 7. As shown in FIG. 11, in the stacked electrode body (100A), the negative electrode (110A) and the positive electrode (120A) are stacked in the D1 direction with a separator (130) interposed.

[0111] Additionally, in the stacked electrode body (100A), a spacer (190) is disposed between the negative electrode (110A) and the separator (130) as described above. Specifically, in this example, a spacer (190) is disposed on the first main surface (1111) side of the negative electrode (110A) (see FIG. 8) and on the second main surface (1112) side of the negative electrode (110A) (see FIG. 9). Likewise, a spacer (190) is disposed between the positive electrode (120A) and the separator (130). Specifically, a spacer (190) is disposed on the first main surface (1211) side of the positive electrode (120A) and on the second main surface (1212) side of the positive electrode (120A). Each spacer (190) is positioned in the center of the D3 direction of the stacked electrode body (100A).

[0112] The length of the spacer (190) in the D3 direction is shorter than the length of the negative electrode (110A) in the D3 direction. The length of the spacer (190) in the D3 direction is shorter than the length of the positive electrode (120A) in the D3 direction. The length of the spacer (190) in the D3 direction is shorter than the length of the metal foil (111, 121) in the D3 direction. The length of the spacer (190) in the D3 direction is shorter than the length of each active material coated area (P111, P121, P112, P122) in the D3 direction. The length of the spacer (190) in the D3 direction is shorter than the length of each active material uncoated area (Q111, Q121, Q112, Q122) in the D3 direction.

[0113] The resin (113) placed in the partial area (Q111a) (Fig. 8) is in contact with the separator (130). Meanwhile, the resin (115A) placed in the partial area (Q112b) (Fig. 9) is not in contact with the separator (130).

[0114] In the second main body (1112) of the negative electrode (110A), a space (S3) is formed on the partial region (Q112b) side between the first and second ends (E112a, E112b) in the D3 direction of the active material uncoated area (Q112) (Fig. 9) and the separator (130). Specifically, a space (S3) is formed between the first end (E115a) of the resin (115A) and the separator (130) in contact with the spacer (190). Likewise, a space (S3) is formed on the partial region (Q112b) side between the second end (E115b) of the resin (115A) and the separator (130) in contact with the spacer (190). The two spaces (S3) formed by one spacer (190) exist spaced apart in the D3 direction. The space (S3) is a gap.

[0115] Since the length of the spacer (190) in the D3 direction is shorter than the length of the negative electrode (110A) in the D3 direction, a space (S3) is formed. Since the spacer (190) is positioned in the center of the D3 direction of the stacked electrode body (100A), two spaces (S3) in the D3 direction are formed by one spacer (190).

[0116] In the first main body (1111) of the negative electrode (110A), a space (S4) is formed on the partial region (Q111a) side between the first and second ends (E111a, E111b) in the D3 direction of the active material uncoated area (Q111) (Fig. 8) and the separator (130). More specifically, a space (S4) is formed between the first end (E113a) of the resin (113) and the separator (130) in contact with the spacer (190). Likewise, a space (S4) is formed on the partial region (Q111a) side between the second end (E113b) of the resin (113) and the separator (130) in contact with the spacer (190). The two spaces (S4) formed by one spacer (190) exist spaced apart in the D3 direction, just like space (S3). Space (S4) is a gap.

[0117] Since the length of the spacer (190) in the D3 direction is shorter than the length of the negative electrode (110A) in the D3 direction, a space (S4) is formed. Since the spacer (190) is positioned in the center of the D3 direction of the stacked electrode body (100A), two spaces (S4) in the D3 direction are formed by one spacer (190).

[0118] In the stacked electrode body (100A), as shown in FIGS. 8, 9, and 10, the positive electrode (120A) has the same configuration as the negative electrode (110A). Also, as described above, a spacer (190) is disposed between the positive electrode (120A) and the separator (130). Therefore, a space similar to the spaces (S3, S4) is formed between the positive electrode (120A) and the separator (130). Also, the space is not shown in FIG. 11 because it is hidden.

[0119] Specifically, between the first and second ends (E122a, E122b) in the direction of D3 of the active material uncoated area (Q122) (Fig. 9) of the second main body (1212) of the positive electrode (120A) and the separator (130), a space (hereinafter referred to as "space (S3')" (not shown)) similar to the space (S3) is formed on the side of the partial area (Q122b). More specifically, a space (S3') is formed between the first end (E125a) of the resin (125A) and the separator (130) to which the spacer (190) is in contact. Likewise, a space (S3') is formed between the second end (E125b) of the resin (125A) and the separator (130) to which the spacer (190) is in contact.

[0120] In the first and second ends (E121a, E121b) in the direction of D3 of the active material uncoated area (Q121) (Fig. 8) of the first main body (120A) of the positive electrode (120A), a space (hereinafter referred to as "space (S4')" (not shown)) similar to the space (S4) is formed on the side of the partial area (Q121a). Specifically, a space (S4') is formed between the first end (E123a) of the resin (123) and the separator (130) to which the spacer (190) is in contact. Likewise, a space (S4') is formed between the second end (E123b) of the resin (123) and the separator (130) to which the spacer (190) is in contact.

[0121] Additionally, the first surface (1111, 1211) (Fig. 8) corresponds to the “first surface” of the present disclosure. The second surface (1112, 1212) (Fig. 9) corresponds to the “second surface” of the present disclosure. The active material coated area (P111, P112, P121, P122) (Fig. 8, Fig. 9) corresponds to the “active material coated area” of the present disclosure. The active material uncoated area (Q111, Q112, Q121, Q122) (Fig. 8, Fig. 9) corresponds to the “active material uncoated area” of the present disclosure.

[0122] [Cars to

[0123] Partial regions (Q111a, Q121a) (Fig. 8) correspond to the "second resin placement region" of the present disclosure. Partial regions (Q112b, Q122b) (Fig. 9) correspond to the "first resin placement region" of the present disclosure. The first end (E112a, 122a) (Fig. 9) and the second end (E112b, 122b) (Fig. 9) correspond to the "third end of the active material uncoated region of the second surface" of the present disclosure. The first end (E111a, 121a) (Fig. 8) and the second end (E111b, 121b) (Fig. 8) correspond to the "third end of the active material uncoated region of the first surface" of the present disclosure. Spaces (S3, S3') correspond to the “first space” of the present disclosure. Spaces (S4, S4') correspond to the “second space” of the present disclosure.

[0124] The stacked electrode body (100A) is summarized as follows.

[0125] (1) As shown in FIG. 7, the stacked electrode body (100A) is formed such that each electrode (each negative electrode (110A), each positive electrode (120A)) and each separator (130) are alternately stacked in the D1 direction and also extended in the D2 direction perpendicular to the D1 direction.

[0126] As shown in FIGS. 8, 9, and 10, each negative electrode (110A) comprises a metal foil (111) having a first surface (1111) and a second surface (1112) on the reverse side of the first surface (1111). Each positive electrode (120A) comprises a metal foil (121) having a first surface (1211) and a second surface (1212) on the reverse side of the first surface (1211).

[0127] As shown in FIG. 8, the first main surface (1111) of the negative electrode (110A) has an active material coated area (P111) that extends in the D2 direction and is coated with active material (112), and an active material uncoated area (Q111) that is continuous with the active material coated area (P111) in the D2 direction and is not coated with active material (112). Likewise, the first main surface (1211) of the positive electrode (120A) has an active material coated area (P121) that extends in the D2 direction and is coated with active material (112), and an active material uncoated area (Q121) that is continuous with the active material coated area (P121) in the D2 direction and is not coated with active material (112).

[0128] As shown in FIG. 9, the second main surface (1112) of the negative electrode (110A) has an active material coated area (P112) that extends in the D2 direction and is coated with active material (114), and an active material uncoated area (Q112) that is continuous with the active material coated area (P112) in the D2 direction and is not coated with active material (114). Likewise, the second main surface (1212) of the positive electrode (120A) has an active material coated area (P122) that extends in the D2 direction and is coated with active material (124), and an active material uncoated area (Q122) that is continuous with the active material coated area (P122) in the D2 direction and is not coated with active material (124).

[0129] As shown in FIGS. 8 and 9, the active material uncoated area (Q112) of the second main surface (1112) of the negative electrode (110A) is located on the other side of the active material uncoated area (Q111) of the first main surface (1111) of the metal foil (111). Likewise, the active material uncoated area (Q122) of the second main surface (1212) of the positive electrode (120A) is located on the other side of the active material uncoated area (Q121) of the first main surface (1211) of the metal foil (121).

[0130] As shown in FIG. 8, the active material uncoated area (Q111) of the first main surface (1111) of the negative electrode (110A) has a resin (113) disposed therein and also has a partial area (Q111a) located on the side of the active material coated area (P111) of the first main surface (1111). Likewise, the active material uncoated area (Q121) of the first main surface (1211) of the positive electrode (120A) has a resin (123) disposed therein and also has a partial area (Q121a) located on the side of the active material coated area (P121) of the first main surface (1211).

[0131] As shown in FIG. 9, the active material uncoated area (Q112) of the second main surface (1112) of the negative electrode (110A) has a resin (115A) disposed thereon and also has a partial area (Q112b) located on the side of the active material coated area (P112) of the second main surface (1112). Likewise, the active material uncoated area (Q122) of the second main surface (1212) of the positive electrode (120A) has a resin (125A) disposed thereon and also has a partial area (Q122b) located on the side of the active material coated area (P122) of the second main surface (1212).

[0132] As shown in FIG. 11, a space (S3) is formed between the first and second ends (E112a, E112b) in the D3 direction, which are perpendicular to the D1 and D2 directions of the active material uncoated area (Q112) of the second main body (1112) of the negative electrode (110A), and the separator (130). More specifically, a space (S3) is formed between the first and second ends (E115a, E115b) in the D3 direction, which are perpendicular to the D1 and D2 directions of the resin (115A) disposed in the partial area (Q112b) of the negative electrode (110A), and the separator (130).

[0133] Likewise, a space (S3') is formed between the first and second ends (E122a, E122b) in the D3 direction of the active material uncoated area (Q122) of the second main body (1212) of the positive electrode (120A) and the separator (130). More specifically, a space (S3') is formed between the first and second ends (E125a, E125b) in the D3 direction of the resin (125A) disposed in the partial area (Q122b) of the positive electrode (120A) and the separator (130).

[0134] According to this configuration, it becomes possible to impregnate the electrolyte injected through the injection hole (2h) of the receptacle (2) into the interior of the stacked electrode body (100A) through each space (S3) and each space (S3'). That is, each space (S3) and each space (S3') can be used as a supply path for the electrolyte. Therefore, in this modified example, there is no need to provide a conduit for guiding the electrolyte within the receptacle (2). Consequently, the stacked electrode body (100A) has excellent electrolyte impregnation properties, and it is also possible to suppress the decrease in volumetric energy density in the capacitor module (1).

[0135] (2) A resin spacer (190) is additionally stacked between the resin (115A) placed in the partial region (Q112b) and the separator (130). With this configuration, a space (S3) can be formed in the laminated electrode body (100). Similarly, a resin spacer (190) is additionally stacked between the resin (125A) placed in the partial region (Q122b) and the separator (130). With this configuration, a space (S3') can be formed in the laminated electrode body (100).

[0136] A resin spacer (190) is additionally stacked between the resin (113) and the separator (130) placed in the partial region (Q111a). With this configuration, a space (S4) can be formed in the laminated electrode body (100). Similarly, a resin spacer (190) is additionally stacked between the resin (123) and the separator (130) placed in the partial region (Q121a). With this configuration, a space (S4') can be formed in the laminated electrode body (100).

[0137] In addition, as shown in FIG. 10, the above description describes a configuration in which a space (S3) and a space (S4) are formed by installing spacers (190) on both sides of the negative electrode (110A), but it is not limited thereto. A spacer (190) may be formed only on one side of the negative electrode (110A). In this case, one side of the space (S3) and the space (S4) is formed. Likewise, a spacer (190) may be formed only on one side of the positive electrode (120A). In this case, one side of the space (S3') and the space (S4') is formed.

[0138] Although embodiments of the present invention have been described, the embodiments disclosed herein should be considered illustrative in all respects and not restrictive. The scope of the present invention is defined by the claims, and all modifications within the meaning and scope equivalent to the claims are intended to be included.

Claims

Claim 1 A laminated electrode body comprises a plurality of electrodes and a plurality of separators, wherein each of the electrodes and each of the separators are alternately laminated in a first direction, and the laminated electrode body extends in a second direction perpendicular to the first direction, and each of the electrodes comprises a metal foil having a first surface and a second surface on the reverse side of the first surface, wherein each of the first surface and each of the second surfaces have an active material coated region extending in the second direction and coated with an active material, and an active material uncoated region continuous with the active material coated region in the second direction and not coated with the active material, wherein the active material uncoated region of the second surface is located on the reverse side of the active material uncoated region of the first surface in the metal foil and has a resin disposed therein, and also has a first resin placement region located on the side of the active material coated region of the second surface, and the active material of the second surface A laminated electrode body, wherein the uncoated region includes an area where the resin is not disposed, and the area where the resin is not disposed includes a first space formed between the end of the first resin disposal region in the third direction and the end of the active material uncoated region in the third direction, in a third direction perpendicular to the first direction and the second direction. Claim 2 A laminated electrode body according to claim 1, wherein the resin is in contact with the separator, and the length of the third direction of the first resin placement area is shorter than the length of the third direction of the metal foil. Claim 3 A laminated electrode body according to claim 1, wherein a resin spacer is disposed between the resin and the separator. Claim 4 A laminated electrode body according to claim 1, wherein the active material uncoated area of ​​the first surface has a resin disposed therein and a second resin disposed area located on the side of the active material coated area of ​​the first surface, and a second space is formed on the side of the second resin disposed area between the end of the active material uncoated area of ​​the first surface in the third direction and the separator. Claim 5 A capacitor module comprising a stacked electrode body described in any one of claims 1 to 4, and a receiver that accommodates the stacked electrode body.

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